Prehospital paediatric emergency care

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Prehospital paediatric emergency care
26                    Review Articles          Medical Education

           Prehospital paediatric
                emergency care

                                                  Citation: Kaufmann J, Laschat M, Wappler F: Prehospital paediatric emergency care.
                                                    Anästh Intensivmed 2020;61:026–037. DOI: 10.19224/ai2020.026

   Summary                                      more, competency and technical re­                             1 Abteilung für Kinderanästhesie,
                                                                                                                 Kinderkrankenhaus der Kliniken der Stadt
                                                sources are not identical to those found
   Because prehospital paediatric emer-                                                                          Köln gGmbH
                                                in a specialised environment, e.g. a                             (Direktor: Prof. Dr. F. Wappler)
   gency care is commonly rendered by
                                                paediatric emergency department. In a                          2 Fakultät für Gesundheit, Universität
   non-specialist teams, always operating                                                                        Witten/Herdecke
                                                prehospital environment, paediatric
   in a suboptimal environment, simple                                                                           (Dekan: Prof. Dr. S. Wirth)
                                                emergencies and – for example – en-
   and feasible treatment recommendations
                                                dotracheal intubation are so uncommon
   are required. First and foremost, these
                                                that practice solely in this environment
   are provided by the resuscitation guide-
                                                cannot provide for advanced experience
   lines, which provide recommendations
                                                [1].
   consistent with the above premise not
   only for cardiac arrest but for most other
   important situations. The laryngeal mask      More than 80% of emergency physi-
   airway and the intraosseous needle are        cians are afraid of being over-
   essential technical adjuncts for airway       whelmed by paediatric emergencies
   management and venous access respec-          or have experienced overwhelming
   tively. Equipment must be provisioned         in such a situation [2].
   for each and every age bracket. Simple
   basic principles and support provided        Complex deficits have been described
   by references and aids can increase the      in the context of simulated scenarios
   safety of drug administration. Sound         [3] and prehospital emergencies [4]; for
   individual and institutional preparations    example, difficulties with endotracheal
   for paediatric emergencies ensure safe       intubation arose in 2/3 of children
   initial care of the child prior to ongoing   with head injuries, whilst the same was
   treatment provided by specialists.           only true of 1/5 of adults in the same
                                                health care setting. At the same time,
       Introduction                             intravenous access was successfully
                                                established in 86% of adults investi­
   When considering prehospital paediat-        gated, whilst the same could only be
   ric emergency care, it is imperative to      said of 66% of children [5]. The European
   develop strategies based on a realistic      Resuscitation Council (ERC) Guidelines
   analysis of circumstances and available      note that due to real-life limitations,
   resources, aiming to provide care at         the recommendations must be “simple
   as close to optimum level as possible.       and feasible” [6]. Even though it may
   Because the circumstances under which        seem remarkable to read this in the                              Keywords
   prehospital care is provided – consider      preamble of a guideline, it is precisely                         Prehospital emergency care
   for example the location, e.g. at the        this basic nature, seeking compromise,                           – Children – Drug safety –
   roadside – can per se be suboptimal,         avoiding excessive burdens on the user                           Treatment recommendations
   compromise is indispensable. Further­        and providing a clear, easily remembered
                                                             Medical Education            Review Articles                              27

and practicable course of action which        amenable to defibrillation (approx. 5%       – due to their relatively high oxygen con-
is its greatest quality. It is as such that   of cases) underscores this mechanism.        sumption and small pulmonary residual
these guidelines offer an essential con-                                                   volume relative to body weight – the
tribution to safe paediatric emergency         Due to the typical pathophysiology          reserve in children is small and they will
care.                                          of cardiac arrest, oxygenation and          suffer a decrease in oxygen saturation
Based on the aforementioned prerequi­-         ventilation are the most important          within seconds following respiratory
sites, this review takes into account          measures in paediatric resuscitation.       arrest. On the other hand, the anatomy
the feasibility and effectivity of recom-                                                  is advantageous when compared with
mended measures and adjuvants. Those                                                       that of the adult, with the larynx situated
                                              • As demonstrated by clear evidence
measures which are either indispensable                                                    relatively higher and a factually difficult
                                                and ascertained by all international
(e.g. intraosseous access) or which –                                                      airway being rather less common. It has
                                                guidelines, resuscitation of a newborn
whilst requiring only a small effort –                                                     been shown that experience and clear
                                                is not possible without successful
would be expected to significantly en-                                                     strategies can significantly increase
                                                ventilation, and chest compressions
hance the safety of paediatric emergency                                                   safety when managing the paediatric
                                                without ventilation are actually
care (e.g. the laryngeal mask airway)                                                      airway.
                                                neither helpful nor indicated [10,11].
are emphasised. A potential desire for        • Whilst, at least for lay persons           Airway management
paediatric emergency care to be rendered        providing telephone-guided aid,            Only approximately 5% of prehospital
solely by designated experts in the field       resuscitation of adults may be             emergencies in Germany involve chil-
is surely an example of the opposite – a        performed forgoing ventilation and         dren, and of those only approximately
measure requiring insurmountable effort,        providing chest compressions only          5% require endotracheal intubation.
espe­cially considering that the required       [12], the resuscitation of children        Therefore, statistically speaking, emer-
number of experts couldn’t even be pro-         has been shown to be associated            gency physicians will perform prehos-
vided. Good preparation in a “protected         with a significantly higher rate of        pital endotracheal intubation of a child
environment” (e.g. simulated scenarios),        survival with good neurological            once every 3 years, and of an infant once
knowledge of current, simple, structured                                                   every 13 years [1].
                                                outcome when lay persons provide
guidelines and the use of adjuvants
                                                chest compressions and rescue
enable non-specialised emergency phy-
                                                breaths [13].                               Airway management routine cannot
sicians to provide safe care [7].
                                              • A further observational study involv-       be established only by experience as
                                                ing prehospital paediatric resus­           an emergency physician.
Typical challenges                              citation also showed conventional
                                                resuscitation incorporating ventilation
                                                                                           Even in paediatric emergency depart-
Oxygenation                                     to be superior. A relatively small
                                                                                           ments, emergency intubation performed
Significance of ventilation for paediatric      group of children who received only
                                                                                           by paediatric medical staff was asso-
emergencies                                     ventilations without chest com­-
                                                                                           ciated with a serious drop in oxygen
                                                pressions showed even better “good
In contrast to adult resuscitation, in                                                     saturation in almost half of the cases. 2
                                                neurological” outcomes [14]. This
which cardiac arrest mostly arises from                                                    out of 116 children even suffered hy-
                                                group was too small to deliver a
a cardiac incident, in children and                                                        poxic cardiac arrest [15]. Prehospital
                                                statistically definitive result, but the
especially in a prehospital environment,                                                   intubation associated with a lower rate
                                                finding underscores the importance
respiratory causes are usually foremost                                                    of complications and higher rate of suc-
                                                of ventilation for the survival of
[8]. Here, cardiac arrest is typically the                                                 cess can only be achieved by physicians
                                                children even outside the neonatal
result of a respiratory incident leading to                                                who intubate children on an everyday
                                                period.
myocardial hypoxia. Whilst in an ideal                                                     basis. It is for these reasons that the ERC
                                              • In addition, clinical experience shows
scenario, adults whose cardiocir­culatory                                                  guidelines note that only those who have
                                                very clearly that infants and toddlers
arrest due to ventricular fibrillation is                                                  safe command of drugs required for
rapidly terminated by defibrillation            cannot be resuscitated without
                                                                                           intubation and are proficient in preoxy-
won’t necessarily suffer tissue hypoxia,        ventilation. As such, measures and         genation and intubation should consider
the respiratory cause of cardiac arrest         adjuncts which enable safe ventilation     prehospital intubation [6]. In all other
in children means that serious organ            of children are indispensable and,         cases supraglottic airways should be
damage has already ensued. This is a            whilst requiring only a small effort,      the airway adjuncts of choice. Under no
major factor in the lower rate of survival      have a significant effect on patient       circumstances may repeated intubation
in infants following cardiac arrest when        survival.                                  attempts be made, as these may lead to
compared with youths or adults [9]. A         Even outside of resuscitation, providing     prolonged apnoea and can cause swell-
more favourable rate of survival in those     oxygenation and ventilation to children      ing and bleeding, leading to a total loss
few children presenting a cardiac rhythm      takes on a central role. This is because     of the airway.
28                                                         Review Articles                 Medical Education

   A prehospital trial involving more than                                                  Working Group for Paediatric Anaes-          recommendation that invasive tech-
   800 children suffering grave conditions                                                  thesia (WAKKA) of the German Society         niques (cricothyrotomy, tracheotomy,
   (cardiac arrest, multiple trauma, head                                                   of Anaesthesiology and Intensive Care        surgical airway) are never required.
   injuries) failed to show any difference in                                               (DGAI) [17]. However, the authors are        Needle cricothyrotomy cannot real-
   the survival rate or neurological outcome                                                of the opinion that laryngoscopy should      istically be performed on infants and
   between those primarily successfully                                                     be performed at an early stage of man-       toddlers as the location coincides with
   intubated and those who were mask                                                        agement, especially in a prehospital         the narrowest section of the paediatric
   ventilated [16]. Seeing then that even                                                   setting. This way airway obstruction         airway and the short neck forces the
   successful intubation cannot positively                                                  by a foreign body or secretions can          operator to adopt a very steep approach
   influence the outcome, the rationale be-                                                 be detected at an early phase. It is not     [18, 19]. If anything, needle tracheot-
   hind intubation needs to be questioned.                                                  necessary to force the laryngoscope into     omy, which likewise is difficult, should
   However, mask ventilation by itself is                                                   a deep position as for intubation; instead   be attempted; the procedure is possible
   certainly also not an ideal ventilation                                                  it can be sufficient simply to open and      with a less steep approach, and the
                                                                                            light up the mouth, making it possible       tracheal lumen is wider at this location
   strategy in a prehospital setting; it binds
                                                                                            to detect the aforementioned compli-         [20]. If at all possible, however, surgical
   at least one person continuously and can
                                                                                            cations, suction the airway or remove a      tracheotomy – a procedure which can be
   be difficult to perform. At that point at
                                                                                            foreign body using Magill forceps.           performed by an experienced surgeon
   the latest, the use of a supraglottic airway
                                                                                                                                         (including paediatric surgeons) within
   is required.
                                                                                                                                         a small number of minutes – should be
   For situations when mask ventilation is                                                   It is extremely unlikely that, follow-
                                                                                                                                         preferred [21].
   not successful, a clear and simple strat-                                                 ing immediate and complete imple-
                                                                                             mentation of the measures set out,          The laryngeal mask airway (LM) is the
   egy needs to be available for immediate                                                                                               airway adjunct which has been most
                                                                                             ventilation should remain impossible
   recall and easy implementation (Fig. 1).                                                                                              thoroughly examined in good clinical
                                                                                             by the point at which a laryngeal
   The measures set out should be es-                                                                                                    trials for both elective and emergency
                                                                                             mask airway is used.
   calated step by step until ventilation of                                                                                             use, is most commonly used, and as
   the child is successful. To a significant                                                                                             such is the supraglottic airway adjunct
   extent, the algorithm equates to the                                                     Based on their own experience however,       which can best be recommended for
   recommendations of the Scientific                                                        the authors do not share the WAKKA           use in children from 1.5 kg body weight
                                                                                                                                         (BW) upwards [22]. Evidence for the
                                                                                                                                         use of the laryngeal tube (LT) is not
       Figure 1
                                                                                                                                         comparable and consists solely of a
                                                                                                                                         small number of studies demonstrating
                                                                              mask ventilation impossible
                                                                                                                                         successful use in children from 10 kg
                                                                                                                                         body weight upwards. Despite this
                                                                                                                                         fact, the LT is used surprisingly often in
                                                                activate                                   CALL FOR HELP                 prehospital settings. However, according
                                                            EMERGENCY PLAN                        e.g. consultant, medical supervisor
                                                                                                                                         to current consensus reached by numer-
                                                                                                                                         ous professional bodies, provisioning
          escalate until ventilation successful

                                                                                                                                         the LT only whilst forgoing the LM as
                                                        DIRECT LARYNGOSCOPY                                                              the clearly “better” airway adjunct,
                                                                                                        remove foreign bodies,
                                                  (to exclude e.g. foreign bodies, blood,
                                                                                                          treat laryngospasm             cannot be recommended. At the same
                                                        secrections, swabs, spasm)
                                                                                                                                         time, provisioning both devices (LM and
                                                                                                                                         LT) and thereby promoting confusion,
                                                                                                                                         increasing costs and taking up addi-
                                                   1)   jaw thrust, two-person mask ventilation, Guedel airway                           tional space would seem less than ideal
                                                   2)   increase anaesthetic depth, decompress stomach
                                                   3)   supraglottic airways (e.g. nasopharyngeal tube, LM)                              [22]. For a brief period at least, during
                                                   4)   neuromuscular blockade                                                           intubation or when neither an LM nor
                                                   5)   (careful) intubation attempt                                                     an LT are available, sufficient ventilation
                                                   6)   intubation aids (e.g. video laryngoscope, bronchoscope)
                                                                                                                                         can almost always be provided using a
                                                   7)   needle tracheotomy (cricothyrotomy)
                                                                                                                                         nasopharyngeal tube (pharyngeal tube;
                                                                                                                                         a nasally inserted tube in the “Wendl
                                                                                                                                         position”) whilst manually providing
                                                                               no success: surgical airway
                                                                                                                                         closure of the mouth and contralateral
       Algorithm for the management of difficult mask ventilation in a child.
                                                                                                                                         nostril. It is imperative that all the afore-
                                                                                                                                         mentioned adjuncts and techniques
                                                                   Medical Education                   Review Articles                                 29

should be trained in the context of job        health require larger fluid volumes.                     pulse oximeter plethysmograph can
shadowing or through participation in          The fluid deficit can be categorised                     point to serious hypovolaemia.
simulated scenarios before they are used       by weighing the child or by clinical                     Deficits resulting in haemodynamic dis­-
in paediatric care.                            assessment (Tab. 2, taken from [27]).                    ruption and any other situation in which
                                               In addition, respiratory variation of the                blood pressure is insufficient with­
Cardiocirculatory support
Blood pressure by age
There is good evidence that age adapted         Table 1
normal blood pressure values (Tab. 1)           Age adapted blood pressure range (min – max) considered safe [25].
are a sufficient therapeutic goal even in        Age group                                                Age adapted blood pressure
emergency situations with increased cer-
                                                 Preterms (approximation)                    Mean arterial pressure = gestational age in weeks
ebral pressure [23] and as such should
                                                                                             systolic pressure               mean arterial pressure
be achieved, but not overstepped [24].
It is also clear that failing to reach these     Preterms                                       55 – 75                             35 – 45
values can cause serious damage.                 0 – 3 months                                   65 – 85                             45 – 55
                                                 3 – 6 months                                   70 – 90                             50 – 65
Rational infusion therapy
Adequate fluid therapy is the basis of           6 – 12 months                                  80 – 100                            55 – 65

sufficient circulatory support. To avoid         1 – 3 years                                    90 – 105                            55 – 70
hyponatraemia and cerebral oedema                3 – 6 years                                    95 – 110                            60 – 75
only balanced electrolyte solutions may          6 – 12 years                                   100 – 120                           60 – 75
be used. When treating infants (< 1 year         > 12 years                                     110 – 135                           65 – 85
of age), the use of solutions containing
additional glucose (1%) is expedient,
if available in the prehospital setting.
Patient safety considerations, however,         Table 2
mean that individual blending of such           Estimating fluid loss (dehydration) based on clinical signs [27].

solutions cannot be recommended.                 Signs and                  minimal/no            slight/medium                 severe
Instead, intravenous boli of 0.1 – 0.2 g/        Symptoms                   dehydration           dehydration                   dehydration
kg BW glucose can be used to treat low           Weight loss                < 3%                  3 – 8%                         ≥ 9%
blood glucose levels, which should be            Consciousness, health      normal                agitated, irritable            apathetic,
determined for every infant and when                                                              or tired                       lethargic,
confronted with altered consciousness.                                                                                           unconscious
                                                 Drinking                   normal                thirsty, drinks greedily       drinks poorly or is
    Acetate-based balanced electrolyte                                                                                           unable to drink
    solutions are the most suitable fluids       Heart rate                 normal                normal to increased            tachycardia; severen
    for maintenance and fluid replenish-                                                                                         cases: bradycardia
    ment.                                        Pulse quality              normal                normal to decreased            weak or not palpable
                                                 (comparison of central
                                                 vs. peripheral pulses)
Basal requirements can be calculated
                                                 Respirations               normal                normal to deep;                deep breathing
using the 4-2-1 rule:
                                                                                                  increased resp. rate           (acidosis!)
• 4 ml/kg/h for every kg for the first
                                                 Eyes                       normal                sunken                         deeply sunken
    10 kg BW,
• 2 ml/kg/h for every kg for the next            Tears                      present               reduced                        none
    10 kg BW,                                    Mucosa                     moist                 dry                            desiccated
• 1 ml/kg/h for every additional kg              Skin folds                 smooth                delayed smoothing,             standing > 2 s
    BW.                                                                     immediately           but ≤ 2 s

To balance deficits caused e.g. by preop-        Capillary refill           normal                prolonged (< 3 s)              severely prolonged
                                                                                                                                 (> 3 s)
erative fasting, in keeping with the above
                                                 Urine production           normal                reduced                        oliguria or anuria
recommendation for basal requirements,
the basal requirement for the first hour         Fluid loss                 < 30                  mild 30 – 50                   > 100
                                                 (ml/kg BW)*                                      medium 50 – 100
can be assumed to be a blanket 10 ml/
kg/h [26]. Children suffering exsiccosis        Resp.: Respiratory; BW: Body weight;
                                                * for children < 6 years of age; school children and adults require smaller fluid volumes due to their
in the context of vomiting and diarrhoea
                                                smaller extracellular space relative to body weight.
or inadequate fluid intake due to poor
30                      Review Articles        Medical Education

   out clear cause should be treated by          adrenaline should be carefully titrat-                ml, from the 7th year of life on 0.5 to
   administration of a 20 ml/kg BW fluid         ed and used only in conjunction with                  1.0 ml administered intramuscularly
   bolus with subsequent re-evaluation           an inotropic catecholamine.                           or intravenously as a single dose…”
   [6]. Current knowledge suggests that for                                                            Experience suggests that a quarter of this
   children with fever and serious infec-                                                              dose should be given initially and the
                                                In prehospital situations, safe and rapid
   tious disease (e.g. pneumonia, sepsis)                                                              drug then titrated according to effect. It
                                                treatment with catecholamines can be
   fluid should, when possible, only be                                                                is also possible to bolus 0.5 (-1) µg/kg
   administered in this fashion once [28]       difficult to implement, particularly be­
                                                cause drug choice and dose are often                   adrenaline, whereby the effect is short
   and catecholamines introduced early.                                                                lived and repeat doses may be required.
   Repeated administration may be neces­        unfamiliar, and dopamine and in some
   sary, especially when treating exsiccosis    cases syringe drivers, are not routinely
                                                provisioned by emergency services.                      Injecting the contents of a 1 ml = 1 mg
   and hypovolaemia; however, an (ad-
   ditional) drop in haemoglobin levels         As such, it is necessary to stabilise                   ampoule of adrenaline into a bottle
   through haemodilution should be kept         the cardio-circulatory situation during                 containing 100 ml of isotonic saline
   in mind. Whilst the use of colloids is       transfer to a paediatric intensive care or              (NaCl 0.9%) results in a concentra-
   typically not necessary and their value      emergency facility using a simple and                   tion of 10 µg/ml, which can then be
   unclear, attempted treatment of an           safe concept. Cafedrine/Theodrenaline                   dosed highly accurately using 1 ml
   otherwise unstable circulatory situation     (Akrinor®) is an example of a suitable                  syringes with a 0.01 ml scale.
   by admin­  istration of 5 – 10 ml/kg BW,     drug. The manufacturer’s summary of
   taking the manufacturer’s recommen-          product characteristics recommends the
                                                following doses [43]: “…Children: de-                  Gaining access for drug administration
   dations regarding contraindications and
                                                pending on the severity of the condition,              and fluid therapy
   maximum doses into account (e.g. 6%
   HES 130/0,42: 30 ml/kg), can be justi-       in the 1st and 2nd years of life 0.2 – 0.4             Placement of an intravenous catheter
   fied [27].                                   ml, in the 3rd to 6th years of life 0.4 – 0.6          can often be difficult in paediatric emer-

   Rational use of catecholamines
   The aim of treatment with catechola-          Table 3
   mines is to re-establish adequate perfu-      Prehospital treatment of children with haemodynamic shock using catecholamines.
   sion and oxygenation of the organs. A
                                                  Type of shock   Catechola-    Dose                     Rules of thumb
   significant intraindividual variability in                     mine                                   a) Preparation
   pharmacokinetics and -dynamics [29]                                                                   b) Dosing
   and the effect of catecholamines can be                                                               c) Escalating treatment
   observed in infants and toddlers (due,         hypody­         dopamine      5 – 20 µg/kg/min         a) 1 ampoule dopamine 5 ml = 50 mg;
   amongst other things, to individual re-        namic/                                                     1 ml = 10 mg + 29 ml NaCl 0.9%
                                                  cardiogenic,                                               → 0.33 mg/ml
   ceptor density and intracellular response                                                             b) rate (ml/h)) = body weight equating to
                                                  preterms and
   [30,31]). When there is no response to         newborns                                                   6 µg/kg/min
   treatment, increasing the dose by one                                                                 c) dobutamine, hydrocortisone, adrenaline
   order of magnitude is recommended,             hypody­         dobutamine    5 – 20 µg/kg/min         a) 1 ampoule dobutamine 50 ml = 250 mg;
   titrating down once an effect ensues [32].     namic/                                                     draw up undiluted → 5 mg/ml
                                                  cardiogenic,                                           b) rate (ml/h) = 1/10th body weight age
   Another peculiarity when compared to           all other age                                              brackets equating to 8 µg/kg/min
   the treatment of adults is the use of do-      brackets
   pamine which, on the basis of available        hypovolae-      adrenaline    0.05 – 2.5 µg/kg/min     a) 1 ampoule adrenaline 1 ml = 1 mg;
   data, is still the most commonly used          mic                                                        6 ml = 6 mg + 44 ml NaCl 0.9%
   catecholamine in newborns, infants and                                                                    → 0.12 mg/ml
                                                                                                         b) rate (ml/h) = 1/10th body weight equating
   toddlers [32,33]. Table 3 summarises the                                                                  to 0.2 µg/kg/min
   catecholamine of choice for treatment
                                                  septic          adrenaline    0.05 – 2.5 µg/kg/min     a) 1 ampoule adrenaline 1 ml = 1 mg;
   of different types of shock in children                                                                   6 ml = 6 mg + 44 ml NaCl 0.9%
   based on current guidelines [34–42] and                                                                   → 0.12 mg/ml
   provides “rules of thumb” for prepara-                                                                b) rate (ml/h) = 1/10th body weight equating
                                                                                                             to 0.2 µg/kg/min
   tion of and dosing with syringe drivers.                                                              c) noradrenaline carefully titrated, only if
                                                                                                             extremities warm
       Even for septic shock, noradrenaline       additionally,   noradrena-    0.05 – 2.5 µg/kg/min     a) 1 ampoule Noradrenalin 1 ml = 1 mg;
       is not the catecholamine of choice in      as required:    line                                       6 ml = 6 mg + 44 ml NaCl 0.9%
                                                                                                             → 0.12 mg/ml
       children because the increase in af-                                                              b) rate (ml/h) = 1/10th body weight equating
       terload rapidly leads to a decrease                                                                   to 0.2 µg/kg/min
       in contractility [32]. As such, nor­
                                                             Medical Education             Review Articles                              31

gencies and may be impossible in some          ministration of drugs, and most              which point on overdosing adrenaline is
circumstances, e.g. exsiccosis or cardiac      drugs achieve bioavailability similar        potentially fatal, there is no doubt that
arrest. In prehospital emergencies of this     to that following intravenous admin-         overdosing by an order of magnitude
kind, placement of a central venous line       istration.                                   (1,000% of the recommended dose;
is inarguably not a suitable alternative.                                                   100 µg/kg BW) is not compatible with
                                                                                            survival [47]. All international guidelines
                                              Doses similar to those used for intra-
    The intraosseous (IO) needle is a                                                       warn explicitly of overdosing adrena­
                                              venous administration can often be
    quick, easy and safe adjunct for ac-                                                    line during resuscitation of paediatric
                                              used for intranasal administration. The
    cess to the vascular system.                                                            patients of any age. Vigilance derived
                                              total should always be split across both
                                                                                            simply from awareness of the danger
                                              nostrils so as to utilise the maximum
                                                                                            and recognition of personal fallibility is
Complications are rare and are only           possible mucosal surface. Administered
                                                                                            pivotal for drug safety [48].
to be expected when the needle remains        volumes should preferably be 0.2 – 0.3 ml
in situ for prolonged periods of time. The    per nostril and should not exceed 1 ml.       Using simple measures can help achieve
current ERC Guidelines recommend the          Copious quantities of secretions or blood     a significant increase in drug safety when
use of an IO needle in all critically ill     can inhibit adequate resorption from the      caring for children [49,59].
children in whom venous access has not        nose, making cleansing or selection of an
been able to be established within one        alternative method necessary. Published        It can safely be assumed that any
minute [6]. The most suitable and typi-       experience is available especially for         measure which reduces the cogni-
cal location in children is the proximal      • midazolam                                    tive load of the prescribing physician
anterior tibia. Use of IO needles can         • fentanyl                                     will increase drug safety in children.
be trained using chicken bones, which         • sufentanil
provide for very realistic conditions.        • ketamine and
It is essential that training should take                                                   In a test of written orders for adrenaline
                                              • dexmedetomidine                             administration for resuscitation, for ex-
place before taking on work in emer-
gency care. Intraosseous drills (EZ-IO®,                                                    ample, use of a simple table was shown
                                              Drug safety in paediatric emergency
Teleflex), which are widely available in                                                    to avoid nine out of ten single order of
                                              care
Germany, are not suitable for newborns                                                      magnitude errors, and the same fraction
and small infants weighing less than 3 kg.                                                  of errors by two orders of magnitude
                                               Grave errors occur regularly during
The tibial spongiosa is so shallow in                                                       [51]. A similar effect was also seen
                                               paediatric emergency care, even in
these children that there is a risk the                                                     when the Paediatric Emergency Ruler
                                               specialised facilities such as paediat-
posterior cortex could be pierced, lead-                                                    (“PädNFL”; “Pädiatrisches Notfalllineal”;
                                               ric emergency departments.
ing to serious damage or even re-                                                           www.notfalllineal.de) was used during
quiring amputation of the lower leg                                                         treatment of “real” prehospital paediat-
[44]. Instead, suitable manual needles        Because suitable doses have to be cal-        ric emergencies: nine out of ten severe
need to be provisioned. The authors           culated on an individual basis, mistakes      dosing errors (> 300% of the recom-
have had very good experience using           such as misplacing the decimal point can      mended dose) of all drugs studied were
18 g butterfly needles in these situations,   lead to results which are off by an order     avoided [52]. With regard to adrenaline,
as is also recommended elsewhere              of magnitude. Whilst typical doses feel       which was overdosed by more than
[45]. They can easily be gripped by the       familiar when treating adults, the wide       300% of the recommended dose in all
wings, are very sharp and have a tube         range of paediatric patients – ranging from   cases where the PädNFL was not used,
attached, simplifying the use.                infants to youths – precludes familiarity     no mistakes were made when using the
For on-off administration of sedatives        with correct doses. Even doses off by an      PädNFL.
and analgesics, the intranasal route us-      order of magnitude can be serviced from       Body weight is a deciding factor for drug
ing an atomiser (“mucosal atomization         a single ampoule, making recognition          administration and must, as such, be
device” – MAD) is an option. The intense      of the error less likely. Because prehos­     taken into meticulous consideration. In
vascularisation of the nasal mucosa and       pital care is neither rendered in a spe-      a prehospital analysis in Germany only
the close proximity to the brain lead to a    cialised environment, nor by specialised      0.5% of emergency physicians’ records
rapid onset of action comparable with         personnel [6], significantly increased        specified the weight of the child [52].
that following intravenous administra-        error rates are incurred. A study in the      If the parents can give the weight of
tion.                                         USA showed that adrenaline was ad-            the child, that weight should be used.
                                              ministered incorrectly 60% of the time,       When the weight is unknown however,
    Owing to venous drainage avoiding         and that the average overdose was 808%        estimates based on age are unhelpful
    liver passage, first-pass metabolism      of the recommended 10 µg/kg BW                and weight should be estimated based
    does not occur following nasal ad-        dose [46]. Whilst it is not known from        on length.
32                         Review Articles                Medical Education

   Team communication is pivotal. Regard-                  lymphadenopathy in the context of             ing external signs (such as bruising or
   less of any hierarchy, all those involved               infection, and unexplained events are         neurological symptoms). For this reason,
   must check every order in its entirety                  described below.                              serious trauma requires neurocranial
   (weight of the child, desired dose per                                                                imaging, preferably in a paediatric
                                                           Trauma
   kg BW, calculated dose and quantity to                                                                radiology department. Prior to fusion
   be administered) and acknowledge it by                  Most injuries are isolated to a single ex-    of the fontanelles, ultrasound is a rapid,
   repeating the entire order before a drug                tremity. The same basic principles used       radiation-free imaging tool, while all
   is administered [53]. When 1 ml syringes                in adult trauma care should be applied,       other children with a score of < 12 on
   with a 0.01 ml scale are used, dilution                 adequate analgesia provided, and the          the Paediatric Glasgow Coma Scale
   can be avoided for most drugs so long                   injury stabilised carefully. Using sup-       should undergo computed tomography
   as administration is followed by flushing               positories in an emergency situation is       (CT) or magnetic resonance imaging
   with NaCl 0.9%. Every emergency                         unlikely to provide a rapid and adequate      (MRI). Bony injuries are better seen
   physician should have paediatric phar-                  effect. Instead, administering opioids        on CT, whilst brainstem injuries and
   macologic information (e.g. age-specific                such as fentanyl via a nasal atomiser [54]    haemorrhage are better represented on
   contraindications and doses) at their                   or using one of the alternatives set out in   MRI. Subgaleal haemorrhage represents
   disposal on scene, e.g. in the shape of a               Table 4 [55] is well suited.                  a special type of head injury which
   tabular compilation or pocketbook.                                                                    does not occur in adults, and which
                                                               As a rule, care for children with mul-    involves haemorrhage between the scalp
   Common paediatric disorders                                 tiple trauma follows the same basic       and the calvaria. As the haematoma may
   Preliminary remarks                                         principles which apply to adult care      spread around the whole head, blood
                                                               [56].                                     loss may become life-threatening and
                                                                                                         must be recognised as such, triggering
       The three most common prehospital
                                                                                                         blood transfusion if required. External
       paediatric disorders, each account-
                                                           Owing to their proportions and skeletal       compression is not helpful, and obsolete
       ing for approximately a third of cas-
                                                           development, however, up to 90%               in the case of open fontanelles. Those
       es, are injuries, respiratory disorders
                                                           of children with serious injuries also        providing prehospital care should be
       and seizures.
                                                           have head injuries, while the chest and       aware of subgaleal haemorrhage and
                                                           ab­domen are less commonly affected           include assessment for this injury in their
   In addition to these three, intussuscep-                when compared with adults. It is note­        trauma evaluation, which would other-
   tion (which does not occur in adults),                  worthy that children may regularly suffer     wise be comparable with an appropriate
   abdominal pain caused by systemic                       serious intracranial injury without show-     adult routine. In contrast, pelvic fractures
                                                                                                         leading to significant blood loss do not
                                                                                                         occur in toddlers.
       Table 4
       Examples of suitable prehospital emergency analgesia.                                             Respiratory emergencies
                                                                                                         Asthma
        Drug, mode of delivery                       Dose, Dosing interval
                                                                                                         Sudden occurrence of dyspnoea with an
        Piritramide (e.g. Dipidolor)
        • IV                                          0.05 – 0.1 mg/kg BW initial bolus                  expiratory stridor and prolonged expira-
                                                      0.025 mg/kg BW every 5 min until pain free         tion should bring a diagnosis of asthma
        Morphine                                                                                         to mind. In addition to auscultation,
        • IV                                          0.05 – 0.1 mg/kg BW initial bolus                  the smaller the child, the more helpful
                                                      0.025 mg/kg BW every 5 min until pain free         laying hands on the chest can be – bron-
        Fentanyl (ampoules containing 50 µg/ml)                                                          chospasm, secretions, consolidation and
        • IV                                          1 – 2 µg/kg BW initial bolus                       the breathing pattern can all be felt and
                                                      0.25 µg/kg BW every 5 min until pain free
        • intranasal using MAD                        1.5 µg/kg BW (0.03 ml/kg BW)                       localised. Therapeutic measures (Tab.
                                                                                                         5) don’t differ from those employed in
        Esketamine (e.g. Ketanest S, ampoules
        containing 5 mg/ml or 25 mg/ml)                                                                  adults [7], and inhaled therapies don’t
        • rectal                                      10 mg/kg BW                                        require age-based dose adjustment.
        • IV                                          0.5 – 1 mg/kg BW
        • intranasal using MAD                        2 mg/kg KG                                         Croup syndrome (stenosing laryngo­
        Ketamine (e.g. Ketamin, ampoules                                                                 tracheitis)
        containing 10 mg/ml or 50 mg/ml)                                                                 Sudden occurrence of an inspiratory
        • rectal                                      15 – 20 mg/kg BW
                                                                                                         stridor together with a barking cough
        • IV                                          1 – 2 mg/kg BW
        • intranasal using MAD                        4 mg/kg BW                                         is usually caused by Croup syndrome
                                                                                                         which generally arises in conjunction
       MAD: mucosal atomization device (nasal atomiser).
                                                                                                         with viral infections, but which may
                                                                            Medical Education          Review Articles                              33

    Table 5                                                                                             a smooth surface in a restive situation.
    Pharmacological treatment for asthma attacks (from [7]).                                            Initially, the foreign body enters the
                                                                                                        trachea, causing an impressive bout of
     Nebulised treatment                                                                                coughing, expelling the foreign object.
     Epinephrine (e.g. Infectokrupp®)                 up to 10 kg BW: 1 ml + 1 ml NaCl 0.9 %            If instead the foreign body reaches the
                                                      (= 4 mg) from 10 kg BW: 2 ml undiluted (= 8 mg)   bronchial system, the child’s condition
     Salbutamol nebuliser solution (e.g. Sultanol®    5 – 10 drops (= 1.25 – 2.5 mg)                    will commonly improve [57]. However,
     sol.)                                            (1 drop per year or 3 kg BW, minimum 3,
                                                                                                        in the course of things, the object may
                                                      maximum 10 drops) in 2 ml NaCl 0.9%
                                                                                                        dislocate into the trachea causing a
     Ipratropium bromide solution (z. B. Atrovent®    5 – 10 pumps (= 0.125 – 0.25 mg)
                                                                                                        life-threatening situation. As such,
     sol.)                                            Dose as for salbutamol, in 2 ml NaCl 0.9%
                                                                                                        fol­lowing aspiration, children should
     Inhalation using a spacer
                                                                                                        always present to a competent hospital
     Salbutamol (e.g. Sultanol®)                      1 – 2 puffs (0.1 – 0.2 mg)                        where any suspicion of aspiration should
     Fenoterol (e.g. Berotec®)                        1 – 2 puffs (0.1 – 0.2 mg)                        be investigated by bronchoscopy. Chest
     Terbutaline (e.g. Bricanyl®)                     1 – 2 puffs (0.25 – 0.5 mg)                       radiographs on the other hand do not
     Corticoids                                                                                         provide any helpful information [57].
     Methylprednisolone (e.g. Urbason®)               2 – 4 mg/kg BW IV                                 In the case of an unconscious child, the
     Prednisolone (e.g. Decortin H , Solu
                                    ®
                                                      2 – 10 mg/kg BW IV                                oral cavity must be inspected and swept
     Decortin®)                                                                                         without delay, followed immediately by
     Prednisone (e.g. Decortin®, Rectodelt®)          5 – 10 mg/kg BW (usually 100 mg) per rectum       measures as set out in the resuscitation
     β2 mimetics IM
                                                                                                        guidelines. These describe in detail the
                                                                                                        measures to be taken in case of foreign
     e.g. Epinephrine or Terbutaline                  10 µg/kg BW (max. 300 µg)
                                                                                                        body aspiration (including, amongst
     Additional Options
                                                                                                        other things, the Heimlich manoeuvre
     Magnesium, Ketamine, Theophylline                                                                  and back blows) [6]. The oral cavity
                                                                                                        should be inspected using a laryngo-
                                                                                                        scope as soon as possible, removing any
occur spontaneously, and which in                       ever, unlike Croup syndrome, children           visible foreign objects. If the condition
turn is caused by subglottic swelling of                with epiglottitis show signs of serious         does not improve, the child should be
mucous membranes. Croup is seldom                       bacterial infection including high fever        intubated. If ventilation is not possible
threatening and can be treated in an                    and notable poor general condition.             via the correctly situated tube, attempts
equivalent fashion to asthma. The differ-               Preclinical intubation should only be           should be made to push the foreign body
ential diagnoses include tracheitis and                 attempted in dire straits and can be            into one or the other main bronchus
epiglottitis (see below), both of which                 extremely problematic in the presence           by intentional deep insertion of the
can be differentiated from Croup by a                   of purulent swelling of the epiglottis. The     tube, following which ventilation of the
prolonged progressing course and high                   receiving hospital should be informed           unrestricted lung should be performed
fever. In unvaccinated children espe-                   of the suspected diagnosis as early as          after retracting the tube into the trachea.
cially, hoarseness, inspiratory stridor and             possible so as to be able to have an ex-        If the aforementioned measures are not
a barking cough – which can typically                   perienced team available for the patient        successful, success is not to be expected
be triggered by applying pressure on                    on arrival. Tracheitis, which cannot be         and the child should be transferred to
the tongue using a spatula – progressing                differentiated from epiglottis clinically,      hospital undergoing ongoing resusci-
over days may indicate diphtheria, a                    has become the most common form of              tation, where the foreign body can be
disease once referred to as “real Croup”.               life-threatening respiratory tract infec-       removed from the trachea.
                                                        tion. The diagnosis can only be made by         Seizures
Epiglottitis, Tracheitis
                                                        bronchoscopy. As a rule, these children         Although seizures in children are usually
Since the introduction of the Haemophi-
                                                        can be intubated without difficulty; even       febrile, other possible causes must be
lus influenza B vaccination, epiglottitis
                                                        so, intubation should be performed              considered:
has become extremely rare, but does still
                                                        using a fibreoptic scope, taking samples        • hypoglycaemia
occur because not all parents go through
                                                        and ensuring precise placement of the           • intoxication
with recommended vaccinations – but
                                                        tube at the same time.                          • head injury
also because other pathogens can be
causative. The clinical picture seen                    Foreign body aspiration                         Meningitis must be excluded in infants
in epiglottitis is similar to that seen in              Foreign body aspiration typically occurs        suffering a febrile seizure without an
croup syndrome and is characterised by                  when a playing child inserts something          obvious focus of infection. Repeated
inspiratory stridor and coughing. How-                  into their mouth or eats something with         application of rectal drugs, which are
34                          Review Articles               Medical Education

   difficult to control and have a delayed                 risk of necrosis of the affected portions      rare. Adherence to guideline-recom-
   onset of action, can cause overdose and                 of the intestines when untreated. The          mended treatment of BRUE requires the
   respiratory depression. As such, the use                diagnosis is made using sonography and         emergency services to present children
   of drugs and routes of administration set               treatment by reduction of intussuscep-         for treatment by a consultant paedi-
   out in Table 6, leading to a rapid onset                tion by insufflation of air or fluid can be    atrician at a children’s hospital [58].
   of action, would seem better suited [7].                provided by the radiology department of        Following thorough examination by the
                                                           any paediatric hospital.                       paediatrician, immediate discharge from
   Abdominal lymphadenopathy and
                                                           Unexplained events                             hospital may be justified.
   intussusception
   Regardless of the focus of infection,                   Emergency services are regularly con-          The role of parents during emer-
   toddlers regularly suffer swelling of                   fronted with reports of events perceived
                                                                                                          gency care
   the abdominal lymph nodes, causing                      to be life-threatening, whilst the elicited
   abdominal pain. This can lead to an                     history doesn’t provide for clear-cut          Presence of parents
   erroneous diagnosis of an abdominal                     deductions and the child presents itself
   disorder, which in turn can sometimes                   in good health. Formerly an apparent            Whenever possible, parents should
   even culminate in unwarranted surgery.                  life-threatening event (ALTE), this             have the opportunity to be present
                                                           expression has been replaced by the             during treatment of their children.
                                                           term brief resolved unexplained event
       Children complaining of abdominal
                                                           (BRUE). This nomenclature was chosen
       pain must always be investigated for                                                               On one hand, parents are generally well
                                                           so as to include events which had
       a focus of infection outside the ab-                                                               informed of the past medical history of
                                                           not been interpreted as life-threatening.
       domen, e.g. by auscultation of the                                                                 their child, can tell the precise weight
                                                           Despite this, the term still defines a
       lungs and inspection of the tympanic                                                               and offer the only possibility to elicit a
                                                           condition involving a change in
       membranes.                                                                                         history. On the other hand, it has been
                                                           • muscle tone
                                                                                                          shown time and again that relevant
                                                           • skin colour
                                                           • consciousness                                psychopathologies are significantly less
   The swollen abdominal lymph nodes
                                                           • and/or breathing.                            common in parents who were present
   may, however, actually cause a real
                                                                                                          for at least some of the treatment of their
   abdominal emergency, namely intus-                      A working diagnosis of BRUE is only            child, even when the child died. As such,
   susception. This usually occurs at the                  permissible if a detailed history and
                                                                                                          the resuscitation guidelines recommend
   ileocecal junction and involves parts of                examination by a paediatrician shows
                                                                                                          parents should be given the opportunity
   the intestine folding into one another,                 no further irregularities. Colloquially, the
                                                                                                          to be present during treatment of their
   typically triggering abrupt, severe spas-               term “unexplained event” is often used.
                                                                                                          child, so long as their presence does not
   modic pain. Bloody diarrhoea may also                   Generally speaking, these events have a
                                                                                                          impact on the quality of medical care
   occur. Spontaneous reduction of intus-                  multitude of possible causes, including
                                                                                                          [6].
   susception can occur, although delaying                 gastroesophageal reflux, seizures and
   treatment whilst hoping for spontaneous                 upper respiratory tract infections. Cardi-     Child abuse and neglect
   resolution is not permissible as there is a             opulmonary causes, however, are very           It should not be overlooked, however,
                                                                                                          that parents may play a role in or be
                                                                                                          the cause of the illness or injury. Parents
       Table 6
                                                                                                          smoking at home, for example, may be
       Pharmacological treatment for seizures.
                                                                                                          the sole cause of asthma in their child.
        Sublingual tablets                                                                                To an often underestimated degree,
        Lorazepam (e.g. Tavor® Expidet®)              < 0.05 mg/kg BW administered as a sublingual        children may be the victims of violence
                                                      tablet                                              or neglect. The most recent available
        Intranasal administration                                                                         figures show an incidence of 10 – 15%
        Midazolam* (e.g. Buccolam®, Dormicum®)        0.2 mg/kg BW (maximum 10 mg)                        in Germany, although a significant dark
                                                                                                          figure has to be assumed. A review article
        Lorazepam (e.g. Tavor® pro injectione)        0.1 mg/kg BW (maximum 4 mg)
                                                                                                          looking at head injuries in children
        Intravenous drug administration
                                                                                                          determined that a quarter of all injuries
        Clonazepam (e.g. Rivotril®)                   0.05 – 0.1 mg/kg BW IV (max. 2 mg)                  in children under 2 years of age were
        Midazolam (e.g. Dormicum®)                    0.1 – 0.2 mg/kg BW IV or intranasal                 inflicted by others [59]. Recognising
        Diazepam (e.g. Valium®)                       0.05 – 0.2 mg/kg BW IV                              abuse gains particular importance with
        Thiopental (e.g. Trapanal®)                   1 mg/kg BW IV                                       the knowledge that violence and abuse
                                                                                                          are commonly not single occurrences
       * midazolam solutions for IV administration cause smarting when administered intranasally.
                                                                                                          but rather not only repeat themselves
                                                                    Medical Education                Review Articles                                  35

but escalate. This does not mean that                  Epistry-Cardiac Arrest. Circulation            19. Navsa N, Tossel G, Boon JM: Dimensions
the worst should always be assumed of                  2009;119:1484–1491                                 of the neonatal cricothyroid membrane –
parents or that forensic aspects should          10.   Wyllie J, Bruinenberg J, Roehr CC,                 how feasible is a surgical cricothyroidot-
                                                       Rüdiger M, Trevisanuto D, Urlesberger              omy? Paediatr Anaesth 2005;15:402–406
dictate treatment. Nevertheless, simple
                                                       B: European Resuscitation Council              20. Johansen K, Holm-Knudsen RJ, Charabi
attentive observation and recording
                                                       Guidelines for Resuscitation 2015.                 B, Kristensen MS, Rasmussen LS: Cannot
of attendant circumstances can offer a                 Section 7. Resuscitation and support of            ventilate-cannot intubate an infant: surgi-
chance to free the child from a spiral of              transition of babies at birth. Resuscitation       cal tracheotomy or transtracheal cannu-
abuse through a process managed by a                   2015;95:249–263                                    la? Paediatr Anaesth 2010;20:987–993
family court after completion of medical         11.   Wyckoff MH, Aziz K, Escobedo MB,               21. Holm-Knudsen RJ, Rasmussen LS,
care (further reading regarding the legal              Kapadia VS, Kattwinkel J, Perlman JM,              Charabi B, Bøttger M, Kristensen MS:
framework and suitable course of action                et al: Part 13: Neonatal Resuscitation:            Emergency airway access in children –
is provided by [60]).                                  2015 American Heart Association                    transtracheal cannulas and tracheotomy
                                                       Guidelines Update for Cardiopulmonary              assessed in a porcine model. Pediatric
                                                       Resuscitation and Emergency                        Anesthesia 2012;22:1159–1165
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