SCOTTISH MUSCLE NETWORK DUCHENNE MUSCULAR DYSTROPHY MULTIDISCIPLINARY PATHWAY
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SCOTTISH MUSCLE NETWORK DUCHENNE MUSCULAR DYSTROPHY MULTIDISCIPLINARY PATHWAY Approved July 2019 Review July 2022 NSD610-018.23 V1 Page 1 of 38
This care pathway was developed in 2015, and updated in 2019, to support the multi-disciplinary care of boys and young men with Duchenne Muscular Dystrophy in Scotland. The care pathway has been developed from the model of the DMD Scottish Physiotherapy Profile (Journal of the Association of Paediatric Chartered Physiotherapists, 2007) and we are very grateful to the physiotherapy network for all the work they have done in laying the foundations and template design for the multi-disciplinary care pathway. This care pathway is intended to be used as a guideline in the management of DMD, in a format which is easy to use, by all members of the multi- disciplinary team, in a clinical setting. It is not intended to be prescriptive of management in specialist areas, but rather as an overview of interventions at key stages in the progress of this condition. Further guidance on the multi-disciplinary management of DMD is now available, and this care pathway is best read in conjunction with this- "Updated international care consensus for management of DMD 2018" The pathway has been written with support from the following working and advisory groups, to whom we are very grateful. Scottish Neuromuscular Physiotherapy Group Scottish Muscle Network Paediatric Subgroup Scottish Paediatric Cardiologists Scottish Paediatric Respiratory Interest Group Scottish National Spinal Deformity Services Scottish Adult Home Ventilation Services Scottish Muscle Network Transitional Care Subgroup Scottish Paediatric Endocrinologists Approved July 2019 Review July 2022 NSD610-018.23 V1 Page 2 of 38
Contents Page Number Stages 4 Stage 1: Diagnosis and Early Stage 5 Stage 2: Young Mobile 6 Stage 3: Going Off Feet 7 Stage 4: Early Power Chair Users 8 Stage 5: Long Term Powered Wheelchair User 9 End of Life Care 11 Useful Information 12 Appendix 1: The Use of Steroids in Duchenne Muscular Dystrophy 13 Appendix 2: SMN – Guidelines for the Management of Bone Mineral Density Problems in Boys with DMD 23 Appendix 3 – Cardiac Assessment in DMD 25 Appendix 4: Respiratory Chart for DMD 27 Appendix 5: Lung Volume Recruitment Techniques 30 Appendix 6: Epworth Sleepiness Scale 32 Appendix 7: Spinal Fusion 33 Appendix 8: References 35 Appendix 9: Useful Contacts 38 Approved July 2019 Review July 2022 NSD610-018.23 V1 Page 3 of 38
STAGES In considering the care pathway, assessments and interventions it is helpful to consider stages of DMD. Stage 1 Early/pre-symptomatic This may occur when diagnosis has been made incidentally, for example diagnostic screening for boys presenting with developmental delay or in families with a positive family history. Being given a new diagnosis like this is devastating for families, sensitive counselling and support at this time can influence the family’s ability to manage in the future. Stage 2 Early ambulant In this stage boys may present with motor difficulties for example toe walking, or difficulty with activities such as running, hopping and stairs. Later boys may have difficulty rising from the floor (Gower’s manoeuvre). Interventions at this stage are aimed at maintaining mobility and preventing secondary complications. Stage 3 Late Ambulant/going off feet Mobility is increasingly difficult. Boys have difficulty managing stairs and walking distances. They may be prone to falls and have difficulty getting back up on their feet without assistance. Long bone fractures can occur, and may lead to loss of mobility. Loss of ambulation can be predicted and anticipatory planning is needed Stage 4 Early non-ambulant In this stage boys are able to sit independently but have lost the ability to walk. In addition to wheelchair provision to aid independent mobility, good postural management is required with particular attention to the increased risk of scoliosis. Stage 5 Late non-ambulant In this stage boys have difficulty maintaining posture, and upper limb function is affected, impacting on other activities of daily living. Ability to feed and possible difficulties with oro-motor function can lead to nutritional problems. Respiratory and cardiac functions are more likely to be impaired, and require interventions. Adolescence and transition to adult services, further education and employment require careful planning and co-ordination. Stage 6 Palliative Care/ End of Life Approved July 2019 Review July 2022 NSD610-018.23 V1 Page 4 of 38
Young men with DMD do face living with a life-limiting condition. Planning for end of life care should be in place when it becomes appropriate. STAGE 1 – Diagnosis and Early Stage Difficulties Diagnosis/ Paediatrician After diagnosis Genetics Physiotherapy Orthotics Equipment/ Social Services Education Presenting OT Approved July 2019 Review July 2022 NSD610-018.23 V1 Page 5 of 38
Speech / Global -Referral to Paediatric -Information Information about -Encourage -For foot -Equipment -Information -Referral to local developmental Neurologist and/or should be given genetic basis for activities as able, variations provision not about DLA - pre-school inter Delay/FTT. Community both in verbal and diagnosis consider referral to such as pes usually Mobility agency planning -Muscle Paediatrician with NM in written form e.g wheelchair services planus (flat required at this component from group. weakness special interest for *MDUK leaflets Family tree and risk for reinforced feet) it may stage. age 3 -Referral to pre- (particularly assessment and *DMD care card of carrier status buggy/light be useful to -Consider Blue badge for school education proximal) investigation. *SMN leaflet determined wheelchair if refer to an access issues parking. support services if presenting with -Investigations include: *Treat-NMD DMD mobility impaired. orthotist for with -Free nappies cognitive gross motor CK, Genetic testing for Family Guide Testing for carrier -Avoid muscle insoles / physiotherapy from age 4 if developmental difficulties eg mutation analysis and -Information status and strengthening/ and inlays. eg home and continence issues concerns. waddling gait, sequencing if required, about support counselling of eccentric exercise -Night nursery/school (Health visitor). -For running, Consideration of muscle groups results, including (It is advisable to splints may . -Referral to social nursery/school hopping, stairs. biopsy if genetics are *MDUK campaign cardiomyopathy avoid strengthening be -Develop- work OT if information about -Toe walking negative. *Action Duchenne screening of female exercises and appropriate if mental housing issues. diagnosis would (tight TAs). -Referral to Genetic clinic, -Request carriers eccentric muscle loss of range assessment if -Referral be helpful. -Boys will Refer to Physiotherapist permission to work as this can of appropriate to/information -Consider rise from the Occupational therapist enrol SMN CAS Other family cause further dorsiflexion with given about social accessibility floor via a prone SALT if necRefer for initial and North star if members at risk damage to the is noted. programme to work services for issues (OT and position using cardiac assessment. appropriate identified and muscle cell promote skills. family assessment PT). their hands to -Consider whether -Information offered counselling membrane). if need for -Transport to “walk” up their appropriate to refer to about/referral to -Introduce and additional support school may be body. (Gower’s clinical trials or treatments Neuromuscular Risk for siblings advise on stretches services. helpful. manoeuvre). depending on mutation e.g care advisor or discussed and for tight muscle -Support and -Additional -muscle Ataluren/Eteplirsen family support. offered future groups and joints. information for support may be cramps. -Information genetic counselling -Advice for nursery/ siblings. required in -Pseudo about other local when appropriate teachers on fatigue educational hypertrophy of support groups issues and muscle environment. calves. weakness. *Information about single shared support plan to family Approved July 2019 Review July 2022 NSD610-018.23 V1 Page 6 of 38
Stage 2 – Young Mobile Description of Paediatrician Respiratory Physiotherapy Orthotic/ Equipment Support Education difficulties Orthopaedic Provision Services -Motor skills affected by -Discuss role and prescribing -Ensure -Liaise with Lead -Night orthoses -Around age 5 *MDUK & -Raise progressive muscle regimes of steroids (0.75mg/day immunisations Consultant and for years if Family care awareness of weakness eg difficulty prednisolone OR Deflazocort are up to date. NM gastrocnemius mobility/fatigue/ advisor/ associated with jump / run / hop and 0.9mg/kg/day: continuous vs 10 -Annual physiotherapist re when ankle falling is Action developmental frequent falls. day on/off pulse therapy). influenza steroid therapy range of problematic Duchenne/ and learning Difficulty with stairs and *Steroid Parent information leaflet immunisation and 6 monthly movement is encourage Information on difficulties, may rising from chairs. given. Recommended. North Star compromised. use of lightweight SMN family be global or -Changes to gait with -Issue steroid care card and -Consider Ambulatory -Continuation manual wheelchair events & specific, lumbar lordosis and information leaflet in event of pneumococcal Assessment with inlays / rather than buggy. patient group. increased risk of waddling/trendelenberg intercurrent illness. vaccination if not (modified version insoles if *refer to MDUK -Social SLD including gait. Refer to endocrinology already given. for centres not appropriate. wheelchair and services ASD and ADHD. -Pseudo-hypertrophy of clinic/specialist nurse for steroid -Baseline lung signed up NS -Walking AFO’s seating guidelines. If need for -Increased risk of muscles e.g. emergency protocol and function tests project). not usually -Specialised additional mental health and gastrocnemius / deltoid. hydrocortisone injection training. (Annual -Encourage recommended as seating and support at emotional -Risk of contractures and Information and video on SMN FVC/FEV1) activities e.g. this can cause equipment in home. difficulties. tightness at end of range website. Cardiovascular swimming as able. deterioration in school may be -Consider - May need particularly ankles, hips If starting steroids: -Avoid standing/ walking beneficial -refer to Social work additional support and wrist flexors. *Check vit D calcium and bone -Information strengthening ability. MDUK booklet on O.T. (Housing for learning -Muscle cramps and pain studies. Consider dexa scan leaflet re: cardiac exercise inclusive and -Action after activity. baseline and annual/bi-annual assessment especially education. adaptations). Duchenne -Learning difficulties in screening according to current given to families. eccentric muscle -Local sleep Learning and school, may be global or guidelines. vit D supplement 400- -ECG and work. counselling or behaviour toolkit specific, increased risk of 800 IU daily. echocardiography -Continuation of *Sleep which can be SLD including ASD and -Check varicella titres and offer biannual after stretches Scotland if downloaded. ADHD. immunisation if negative. age 6- screening appropriate to problems with -Consider access -Increased risk of mental -Assess TB risk and offer BCG if for stage of sleeping to curriculum and health and emotional appropriate. cardiomyopathy progression (refer through the accessibility of difficulties -Assess growth and BMI. Healthy in ambulant boys to Scottish night. classrooms and diet information given, 6 monthly with DMD Physiotherapy -Support facilities. paediatric review for side-effects profile for specific through (BP, growth, behaviour, urinalysis physiotherapy school, for glucose, fundoscopy adjust relating to stage of clinical steroid dose as required for the condition). psychology growth or side effects. Demonstration or CAMHS Approved July 2019 Review July 2022 NSD610-018.23 V1 Page 7 of 38
-Recommend family attend local videos available if concern orthoptist annually for cataract on SMN website about screening. behaviour or mental health. Stage 3 – Going off feet Difficulties Paediatrician Respiratory Physiotherapy Orthotic/orthopaedic Equipment and postural Support Education Description bone health management Services -Increased -Paediatrician maintains -Monitor FVC -Continuation of -Night AFO’s if child is still -PT/OT assessment to -Social -As above effort and time to overview of all medical annually while stretches / passive compliant. minimise risk of falls. services -Moving and rise from chair / care. above 50% then movements and -Consider daytime -Manual wheelchair with support at handling floor. May be -Discussion about 6monthly. exercises as able. AFOs if sitting in wheelchair supportive cushion and home review as per unable to rise treatment plan for -Ensure -Hydrotherapy if for long periods of time. backrest. Referral for /respite care local without support. continuation of steroids if immunisations up available. -Referral to local powered wheelchair. It may as above. policy (both -Increasing prescribed. Monitoring for to date. -6 monthly North orthopaedic surgeon if be appropriate to consider -Motability at home frequency of side-effects as above -Encourage Star Ambulatory contractures present-may a powered chair with (adapted and school). falls. including, BP, urinalysis, annual influenza n Assessments need future surgery. advanced functions (see vehicle should -Raise -Requires a weight, behaviour - and pneumococcal (NSAA). -Risk of long bone fracture MDUK booklet on be considered awareness wide base of annual bloods FBC, vaccination if not -Continue to increased, often associated wheelchairs and seating). at this stage). of need for support. calcium, phosphate, alk already. monitor lower limb with loss of continuing -Introduce standing frame -Blue Badge hoisting. -Difficulty phos/ vitD/ gluc contractures as ambulation. if appropriate Consider heel for parking. -Postural standing with -dexa studies Cardiac surgery may be -Maintain mobility/ standing wedges to assist standing if -Safety risk of support heels down. ability within a standing dorsiflexion compromised. stairs, housing Approved July 2019 Review July 2022 NSD610-018.23 V1 Page 8 of 38
-Difficulty -check emergency -Information indicated once non frame/ wheelchair if -Familiarisation with safe needs to be within the standing still for protocol. leaflet re: cardiac ambulant. appropriate. moving and handling/ accessible and classroom >3s. -Discuss need for spinal assessment given -Games to -Thoracolumbar lateral x- hoisting techniques. adapted for and -Tires easily and respiratory to families* promote effective rays if complains of back -Profiling bed for home wheelchair increased with physical assessment on loss of -ECG and echo in – expiration eg pain. with lateral tilt if available. assistance activity. ambulation. biannual screening wind instruments, -Referral/discussion re: may be -Increased -Review of emotional and for cardiomyopathy Blowing bubbles, bisphosphonate therapy in required for upper limb mental status. From age 6 whilst Incentive event of low impact toileting weakness. ambulant. spirometer. fracture, if low bone mineral -Wheelchair -Asymmetry -Blood pressure -Inspiratory muscle density present accessible noted in monitoring at training not transport to standing and paediatric clinic if recommended as it school. sitting. still on steroids. requires resistance. -Consider pre- symptomatic treatment if cardiac function deteriorating. Stage 4 – Early Power Chair Users Difficulty Paediatrician Respiratory Cardiac Orthopaedic Equipment Support Services Description Provision/OT -Boys have lost -Paediatrician maintains -Refer to local Respiratory -Cardiac review annually for -Referral to national -Introduction to -Consider referral to children ability to walk overview of medical care and Paediatrician for cardiomyopathy screening. spinal deformity sleep system if social work team for community independently co-ordination. respiratory assessment. -If cardiac screening centre for spinal unable to change support/ respite services if not but may be able -Discussion about treatment -Monitor FVC 6-12 undertaken by paediatrician management if position in bed already known. to sit and assist plan for continuation of steroids monthly while > 50%, For refer to cardiology services if scoliosis develops. -Profiling bed -Introduction of care agency to with transfers. if prescribed. Monitoring for 6-12 monthly night time abnormalities on screening, if -Surgical TA release should be issued assist with areas of personal -Increased risk side-effects as above including, SpO2 (ideally with CO2) not already known. may improve sitting -Standing frame care. of scoliosis. BP, urinalysis, weight, behaviour once FVC
-Some ability to Not on steroids, every 2–3 (ideally carboxyography) 6- removal of plasters to hip / knees are Education self-propel years. 12 monthly if FVC
Stage 5 – Long Term Power Wheelchair User Description Paediatric Clinic Respiratory Cardiac GI/ Nutritional Support Services -Young person is -Paediatrician maintains -Immunisations up to date. -Cardiac review annually or as -Nutrition BMI monitored at -Continence care adviser for dependent on overview of medical care -Active treatment of recommended. Monitor ECG and paediatric/young adult clinic. toileting difficult eg power chair for and co-ordination. respiratory infections with echo annually.MRI if indicated. -Referral to SALT for feeding Uribags (discreet bottles). mobility, unable to -Review steroid antibiotics. -Consider treatment with ACE assessment of concerns/risk of -Young people’s advocacy assist with prescription and side- -Teach parents / carers chest inhibitors +/- Beta blocker if aspiration. services. transfers, no effects if still prescribed. clearing and assisted coughing progressive changes seen. -Referral to dietetics if concerns re: -Welfare Rights. longer has sitting Steroid monitoring as techniques. Including access Treatment should be initiated ideally intake and weight. -Referral to social work services balance. above. Check to cough assist machines if before onset of symptoms -Consider referral for gastrostomy for respite care and support at -Scoliosis may emergency protocol. clinically indicated. (development of symptoms is placement if weight unsatisfactory home. be rapidly -Referral to - (app 1) Consider Lung usually late due to immobility). despite supplements or Transition to adult/ other progressive if endocrinology age 14 for volume recruitment -Monitor for rhythm disturbances, supplements needed > 2 years. services surgical puberty assessment or if techniques. symptoms of cardiac failure -Assess symptoms of GO reflux -Consider further education/ intervention growth poor if on steroid -Monitor spirometry at least Consider treatment if appropriate. and manage appropriately. Employment/independent living. delayed. Therapy. annually. -Holter monitoring if arrhythmia/ -Assess bowel function and -Transition support worker if -Respiratory - Bone health -Arrange overnight oximetry palpitations. management. available. function may be -Consideration of (ideally carboxyography) 6-12 -SMN leaflets “some useful things impaired, with transitional care to adult monthly if FVC
Description Paediatric clinic Respiratory Physiotherapy GI/Nutritional Equipment Provision Support Services Person is Consider emergency Medication to reduce saliva Passive movements SALT Specialised pressure reducing dependent for all care and links with acute and secretions and regular assessment if mattress may be required such as care hospitals Cough augmentation and positioning to relieve concerns about an airflow mattress. Profiling chest clearing techniques if pain and pressure safe swallow/ risk bed/chair. Occasionally collar is Functional muscle Consider: tolerated of aspiration required to support airway when power may be anticipatory care Addition of assisted daytime Complementary lying limited to finger planning, DNR plan, ventilation when sats therapies may be Consider non oral movements palliative care register- dropping or symptoms helpful nutrition with NG Wheelchair provision with adequate Difficulty chewing see below present daytime despite tube or degree of tilt, consider chairs with and swallowing / nocturnal ventilation gastrostomy specialised function loss of appetite Ventilation used more placement and weight loss frequently at this stage. Ensure adequate head support Frequent chest Invasive ventilation may be Ensure adequate particularly during feeding and infections considered with fluid intake to travelling). tracheostomy and access to prevent Positioning with pillows or sleep Multiple airway suctioning if daytime dehydration system for comfort contractures support required Changing plinth/ shower Day time Cardiac ventilatory Hoist for transfers assistance may be required Environmental controls and aids to support independent living as far as Difficulty sitting possible upright in chair – spending long periods of time in bed Approved July 2019 Review July 2022 NSD610-018.23 V1 Page 12 of 38
End of Life Care DMD is a progressive disease and life expectancy is limited. It is difficult to pinpoint when someone is reaching end stages of their life, but at some point everyone will. With this in mind, the opportunity needs to be taken to talk about end of life care, to plan ahead about the things that are important to the young person and their loved ones, before and around the time of death. A review of the young person’s wishes, priorities and needs should be undertaken with their active participation, and that of their family and loved ones, at this time. Whilst practitioners working within children’s and adult’s palliative care services will assist with end of life and bereavement care, a number of tools are available e.g. the Anticipatory Care Planning tool (Living and Dying Well). This can help any staff working with the young person at this sensitive time to engage and involve them in reviewing their wishes and those of their family and loved ones, and to draw up an end of life plan. Use of the Together for Short Lives Core and Transitional Care Pathways can help ensure good care planning and managing of end of life needs. District Nurses and GPs are familiar with the Gold Standards Framework, and out of hours palliative care summary systems that assist these services to support and provide effective end of life care at home if this is the young person’s wishes Approved July 2019 Review July 2022 NSD610-018.23 V1 Page 13 of 38
1. MDUK booklet - Introductory guide for families with a child newly diagnosed with Duchenne Muscular Dystrophy 2. MDUK website- www.musculardystrophyuk.org 3. Action Duchenne website - www.actionduchenne.org 4. Scottish Muscle network website- www.smn.scot.nhs.uk 5. Scottish Muscle network- “some useful things to know about DMD” leaflet available on website 6. Scottish Muscle network- DMD care card leaflet available on website 7. A Guide for parents- the Education (Additional support for Learning)(Scotland) Act 2004- www.scotland.gov.uk 8. Steroids and duchenne muscular dystrophy- FAQs- available on MDC website (appendix 2) 9. Healthy eating for children with NM conditions- available on MDC website (appendix 3) North star information and consent form 10. North star project - monitoring for side-effects of steroids (appendix 1) Scottish Muscle Network - guideline for bone management in DMD (appendix 1) 11. Wheelchair provision for children and adults with muscular dystrophy and other neuromuscular disorders www.musculardystrophyuk.org 12. Sleep Scotland- www.sleepscotland.org 13. Learning and Behaviour Toolkit- action Duchenne website www.actionduchenne.org 14. Physiotherapy management for boys with DMD- available on website www.musculardystrophyuk.org 15. Scottish Muscle network leaflet “some useful things to know about transition” available on SMN website www.smn.scot.nhs.uk 16. TREAT-NMD DMD Care Standards www.treat-nmd.eu/care/dmd/dmd-care 17. TREAT-NMD DMD Family Guide www.treat-nmd.eu/care/dmd/family-guide 18. Passive movement and stretches video www.smn.scot.nhs.uk Approved July 2019 Review July 2022 NSD610-018.23 V1 Page 14 of 38
Appendix 1 THE USE OF STEROIDS IN DUCHENNE MUSULAR DYSTROPHY CONSENSUS BEST PRACTICE 2005 Recommendations These recommendations are based on review of the existing literature and clinical experience of the members of the North Star Network for paediatric neuromuscular disease management. The decision to start glucocorticoid treatment should be made by a physician experienced in management of DMD, after a full discussion with the affected child and the parents. The arrangements for long term follow up should be made at a clinic / centre with medical and physiotherapy facilities for monitoring of disease activity and glucocorticoid therapy are available. Which Glucocorticoid? Prednisolone: We consider Prednisolone to be the glucocorticoid of choice in view of our familiarity and experience in the UK studies and clinical practice, its easy availability and low cost, and the high incidence of cataracts reported with the use of deflazacort. Prednesol 5mg water-soluble tablets may have the benefit of ease of administration and less gastrointestinal side effects. Deflazacort: Deflazacort appears to have less weight gain side effects. Randomized controlled trial to compare deflazacort and prednisolone for their adverse effects is in process. Deflazacort may be a consideration for prednisolone treated boys who have excessive weight gain which is unresponsive to dietary / exercise / dose adjustments. What dose? The starting dose is as follows: Prednisolone 0.75 mg/kg/day, (rounded off to the nearest 2.5 mg e.g. 10, 12.5, 15, 17.5 or 20 mg per day), to a maximum of 40 mg/day. In glucocorticoid equivalence, 1 mg prednisolone = 1.2 mg deflazacort 0.75 mg prednisolone = 0.9 mg deflazacort Which regime? The preceding text explains why there is no overwhelming consensus on which to base didactic recommendations on continuous (daily) prednisolone vs an intermittent (repetitive cycles of 10 days on, 10 days off prednisolone) regime. In view of these facts a reasonable option is to explain our current understanding of the pros and cons of these two treatments to each family and allow them to make an informed consent decision on whether to opt for the daily regime or the intermittent regime. An information sheet highlighting the two regimes is available at the MDC North Star website. In both regimes the dose may require a decremental adjustment, if there are side effects. Each patient offered corticosteroid therapy should be included as part of an agreed protocol to monitor efficacy and minimise potential side effects of treatment.
Contraindications to the use of prednisolone in DMD Hypertension, diabetes mellitus, gastric / peptic ulceration are relative contraindications. Use of Prednisolone in DMD The following recommendations for prednisolone therapy have been customised for specific age (and functional) groups of boys with DMD because of the variability in the therapeutic response and the side effects in these groups. A randomised trial of glucocorticoids in young vs older DMD patients has not been published but analysis of subgroup of patients studied by Taylor suggests a more significant response in the younger patients (Dubowitz 1997). This was further highlighted by the recent report by Dubowitz et al (2002) and other unpublished data from the group of Angelini. On the other hand, the long term cumulative side effects of steroids initiated at an early age in DMD have not been systematically assessed in large studies. The age specific recommendations attempt to get the best benefit vs risk ratio at the various disease stages. "Presymptomatic" phase (age range 0 - 3 years) This group comprises of boys who are diagnosed early on the basis of family history or following incidental discovery of high CK or ALT/AST in the course investigation of other medical problems. There may be a theoretical advantage in starting glucocorticoid treatment early, prior to major muscle cell necrosis and replacement by fibrosis. With the evidence available however, we are reluctant to expose these young boys to the long term side effects of steroid treatment at a relatively asymptomatic stage and therefore do not recommend routine use of prednisolone in this group. Early ambulant phase (4 - 7 years) The option of glucocorticoid therapy should be offered to all families in this age group being followed up at centres with expertise and facilities for long term monitoring of efficacy of treatment and side effects. If the possible side effect profile is acceptable to the parents / child and physician, treatment may be initiated in the context of a nationwide program with regular audit to enable improvements in clinical practice. Late ambulant phase (7 years till loss of walking) These are boys who often have lost the ability to rise from the floor and their walking is deteriorating gradually or rapidly, with impending loss of ambulation. Glucocorticoids should also be offered at this stage, provided the adverse effect profile is acceptable to the family and the physician. It has to be appreciated that the benefit of starting glucocorticoids, from the mobility perspective, at this age might be limited. The decision regarding treatment entails a full discussion with the family and the need for monitoring facilities as above. Constant wheel chair dependent phase There is little data, in this group, to support the initiation of glucocorticoid therapy, and at this stage, the adverse effects may out-weigh potential benefits. In view of the reported long term improvement of respiratory function (Biggar 2002, Alman 2004), pilot studies to demonstrate the effect of glucocorticoids on respiratory muscles are being considered Approved July 2019 Review July 2022 NSD610-018.23 V1 Page 16 of 38
When to discontinue glucocorticoid treatment. The functional and clinical benefit is almost always obvious within 6 months treatment. If there is no improvement / stabilisation over the first 6 months of treatment, glucocorticoid therapy may be discontinued. The presence of side effects unacceptable to the child / parents / physician Loss of ambulation. In this situation, the risks and side effects of ongoing treatment may outweigh the potential benefits. However, in view of the possible benefit to arm and respiratory function, this policy needs to be kept under review and under discussion with families. Protocol of monitoring - "Good practice" Baseline assessment Baseline assessment should include the following Full physiotherapy assessment urine dipstix testing full blood count (FBC), random glucose, electrolytes urea, creatinine 25OH Vit D levels varicella antibodies, bone mineral density assessment by Dual X-ray Absorptiometery (DXA) scan is desirable (See further under "strategy for prevention of osteoporosis"). Dietary advice. Referral to the dietician at initiation of prednisolone should be made. Emphasis on plans to prevent excessive weight gain and maintenance of adequate Vit D and Calcium intake is recommended. Screening for Tuberculosis: Family history of tuberculosis (Tb) should be sought from all at the baseline assessment. If there is history of active Tb in a family member, this would be a contra-indication for steroid use, till the affected member has been fully treated, the boy has received the appropriate screening prophylaxis and infectious diseases specialist’s review and advice. Boys from communities with high incidence of Tb (eg recent immigrants from developing world countries) should be offered Mantoux testing and BCG as indicated, with parental consent prior to joining the trial; such children should not be started on prednisolone until 4 months following the BCG vaccination. Varicella vaccination should be offered to boys who are susceptible as evidenced by varicella antibody negative status. This will prevent routine future need for Zoster Immunoglobulin (ZIG) and acyclovir on exposure of these boys to chickenpox. If the boy is coming up to school starting age, consideration may be given to expedite the MMR pre-school booster ahead of starting the glucocorticosteroid. MMR pre-school booster can be given from 3.5 years of age onwards. Progression of disease activity / response to treatment Regular assessments should be done at 3 months and then six monthly or more frequently if indicated in a particular patient. Approved July 2019 Review July 2022 NSD610-018.23 V1 Page 17 of 38
Physiotherapy assessment (according to North Star assessment protocol) MRC score Timed Gowers’ manoeuvre (starting from the cross legged sitting position) 10 metres walking times Motor ability score Measurement of contractures Myometry of 4 muscle groups (elbow flexion; grip; knee flexion; knee extension) Forced vital capacity (FVC), as soon as the boys are able to co-operate with the technique. Monitoring of possible side effects at each assessment – (Table 3) Weight plotted on Child Growth Foundation Chart Standing height // BP Urine dipstix testing for glucose Cushingoid features Mood / behavioural / personality / GI / skin changes Screening for cataracts with red reflex Record any bone fractures Record any intercurrent infections Specialised assessments to include Ophthalmologic review for cataracts is not recommended as routine, as the huge majority of steroid induced cataracts have been asymptomatic. Red reflex should be screened for on each assessment. Visual acuity should be tested annually, and this can be done by the opticians) Echocardiogram to be performed, as clinically indicated, before any surgery and at time of loss of ambulation. Please note the ENMC workshop recommendations Approved July 2019 Review July 2022 NSD610-018.23 V1 Page 18 of 38
Adverse event Measure Prophylactic Events as criterion for dose Events as criterion for drug Specific comments group measures reduction withdrawal Behaviour Parental Advice on Behaviour changes disrupting family/ Severe behaviour changes changes reporting behaviour school life disrupting family/ school life modification Weight Weight for Dietary 25% or 3 centile increase from Weight gain unacceptable to age/ height/ advice baseline child/ family despite dietetic BMI input/ dose reduction Height Standing Failure to gain height that is Failure to gain height that is height or unacceptable to child/ family unacceptable to child/ family arm span in despite dose reduction non - ambulatory Bone Density DEXA Dietary Treat limb fractures annually if advice about with early available, Ca & Vit D, mobilisation. recording of sunshine, Treat vertebral fracture exercise fractures with iv history bisphosphonates Glucose Glycosuria Dietary fasting blood sugar >110 126 checked if glycosuria glucose two hours after meal mg/dl or blood glucose 2 present on urinalysis >140
Table 3. Managing steroid side-effects / adverse events of echocardiogram at diagnosis, before any surgery, every two years till 10 years of age and then annually (Bushby et al 2003) Management of side effects – Please refer to tables 3 Strategy for prevention of osteoporosis This issue was discussed in detail in an MDC sponsored workshop (Quinlivan 2005). The key aspects recognized were as follows: Three published studies have demonstrated that in boys with DMD, the bone mineral density as measured by DEXA scanning, is lower than normal for age (Larson 2000, Aparicio 2002, Bianchi 2003). The high fracture incidence in DMD, ranging from 20 - 40 % is well recognised. In-patients not treated with glucocorticoids these fractures are almost exclusively in the limbs, and spare the vertebrae. Nutritional aspects for prevention of osteopenia / osteoprosis are important. One study (Bianchi 2003) documented low 25 OH Vit D levels in boys with DMD. Checking for this at diagnosis and treatment if indicated is recommended With long term glucocorticoid use in long non-randomised studies, a high incidence of vertebral fractures has been reported (Bothwell 2003) Long term steroid use, with cumulative doses of glucocorticoid, inevitably leads to trabecular bone loss, osteoporosis, and consequent vertebral fractures. The effect on long bones is not as marked. DEXA scan measured bone density scores have been used in adults for WHO definition of osteoporosis, but these criteria cannot be applied in children. The pitfalls of DEXA scanning, and the need to interpret DEXA bone density Z scores in context of child's age, height, weight (Fewtrell 2003) emphasized. "Given the difficulties discussed, a child may most appropriately act as his or her own control, with serial (DEXA) scans to monitor progress" (Fewtrell 2003) At present, in the paediatric age group, the precise correlation / threshold (if any) of Bone density Z scores and risk of vertebral fractures is not known. DEXA scan, therefore, in an individual boy with DMD not predict the vertebral fracture. Serial DEXA scans in the individual patient can identify trends of change, and may be used to monitor the effect of specific treatment. In patients on Gluccortcicoid treatment, there is no evidence base to demonstrate prevention of osteoporosis with the routine use of Ca or Vit D. (This will obviously not be applicable to the individual patient who is Ca or Vit D deficient) There is not enough paediatirc data to support routine clinical prophylactic use of bisphosphonates in boys with DMD on glucocorticoids. Glucocorticoid therapy induced osteoporotic vertebral fractures can be treated effectively with IV palmidronate treatment, and the anticipated duration of treatment is usually 1 year Dr Quinlivan is the paediatric lead for submitting a grant proposal for a study of bone density and effects of bisphosphonate treatment in DMD. The clinical role of DEXA scanning in DMD and it's glucocorticoid treatment is still being clarified. Acquisition of data and further studies in this area may allow us to better delineate the clinical and prognostic value of DEXA scans over the coming years. DEXA scans of children should be interpreted by or in collaboration with centres with a clinical team with a specific interest and expertise in bone densitometry in children, especially if the scan results are to be used to start or change treatment. Approved July 2019 Review July 2022 NSD610-018.23 V1 Page 20 of 38
The North Star Network will review the osteoporosis assessment and prevention policy in future with the further availability of data. As of now, the following are recommended Ca and Vit D intake dietary assessment at diagnosis and initiation of Glucocorticoids 25OH Vit D levels check at diagnosis / initiation of glucocorticoids DEXA scan is desirable at starting glucocorticoids In DMD boys on glucocorticoid treatment, lateral XR of thoraco lumbar spine and DEXA scan will be indicated for back pain spinal deformity loss of height Serial DEXA scans may be indicated to monitor patients with vertebral fractures on bisphosphonate treatment. Please ensure that the DXA scan software uses age appropriate normative bone density data from paediatric population to define normal ranges and to calculate z scores, and that any abnormal results are discussed with the regional "Bone metabolism expert" Management of Osteoporosis / Fractures Single long bone fracture is not considered an indication for DEXA scan or discontinuation of glucocorticoids. Recurrent long bone fractures or a single vertebral fracture will need to be discussed with the "bone metabolism specialist" / endocrinologist. Effective treatment with IV palmidronate is available. The decision to continue/discontinue prednisolone depends on the quantum of benefit to that child, and his and the parental wishes. Data collection and maintenance of database It is important to systematically collect sequential data on disease progression and the effects and side effects of prednisolone treatment and maintain a database of all affected boys at the local neuromuscular centres. This is essential to facilitate audit and research and improve clinical practice. The North Star network project co-ordinator will be instrumental in this regard. Muscular Dystrophy UK MDUK has a suite of factsheets which you can find here: https://www.musculardystrophyuk.org/search/healthy+eating+and+neuromuscular Approved July 2019 Review July 2022 NSD610-018.23 V1 Page 21 of 38
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Kissel JT, Burrow K, Rammohan KW. et al (1991). Mononuclear cell analysis of muscle biopsies in prednisolone and azathioprine treated Duchenne muscular dystrophy. Neurol 41:667-672 Larson CM, Henderson RC (2000). Bone mineral density and fractures in boys with Duchenne muscular dystrophy. J Pediatr Orthop. 20:71-4. Manzur A, Kuntzer T, Pike M, Swan A. Glucocorticoid corticosteroids for Duchenne muscular dystrophy. Cochrane Database Syst Rev. 2004;2:CD003725 Manzur AY, Dubowitz V. 2000 "Muscular dystrophies" in New treatments in Neurology. Ed Neil Scolding. Butterworth Heinemann Manzur AY, Kuntzer T, Pike M, Swan A. Glucocorticoid corticosteroids for Duchenne muscular dystrophy. Cochrane Database Syst Rev. 2004;(2):CD003725. Manzur AY. 2001"Treatment of muscular dystrophy" in Muscular dystrophy. Ed AEH Emery. Oxford Medical Publications McDonald DG, Kinali M, Gallagher AC, Mercuri E, Muntoni F, Roper H, Jardine P, Jones DH, Pike MG. Fracture prevalence in Duchenne muscular dystrophy. Dev Med Child Neurol. 2002 Oct; 44(10): 695-8. McDonald DG, Kinali M, Gallagher AC, Mercuri E, Muntoni F, Roper H, Jardine P, Jones DH, Pike MG. Fracture prevalence in Duchenne muscular dystrophy. Dev Med Child Neurol. 2002 Oct;44(10):695-8 Mendell JR, Moxley RT, Griggs RC. et al (1989). Randomized controlled trial of prednisolone in Duchenne's muscular dystrophy. NEJM 320:1592-1597, Merlini L, Cicognani A, Malaspina E, Gennari M, Gnudi S, Talim B, Franzoni E. Early prednisone treatment in Duchenne muscular dystrophy. Muscle Nerve. 2003;2:222-7 Mesa LE, Dubrovsky AL, Corderi J, Marco P, Flores D (1991). Steroids in Duchenne muscular dystrophy--deflazacort trial. Neuromuscul Disord. 1:261-6. Moxley RT 3rd, Ashwal S, Pandya S, Connolly A, Florence J, Mathews K, Baumbach L, McDonald C, Sussman M, Wade C; Quality Standards Subcommittee of the American Academy of Neurology; Practice Committee of the Child Neurology Society. Practice parameter: corticosteroid treatment of Duchenne dystrophy: report of the Quality Standards Subcommittee of the American Academy of Neurology and the Practice Committee of the Child Neurology Society. Neurology. 2005 Jan 11;64(1):13-20 Muntoni F, Fisher I, Morgan JE, Abraham D. Steroids in Duchenne muscular dystrophy: from clinical trials to genomic research. Neuromuscul Disord. 2002 Oct;12 Suppl 1:S162-5 Pandya S, Myers G and RT Moxley. Effect of daily prednisone on independent ambulation in patients with Duchenne muscular dystrophy treated up to 15 years. World Muscle Society Congress, Salt Lake City, Utah, 5-8th September 2001. Neuromuscular Disorders, 2001; 11, Pandya S, R.T. Moxley. Long Term Daily Prednisone Therapy Delays Loss of Ambulation and Decline in Pulmonary Function in Patients with Duchenne Dystrophy. Xth International Congress on Neuromuscular Diseases, Vancouver, Canada, 8th-12th July 2002. Pasquini F, Guerin C, Blake D. et al (1995). The effect of glucocorticoids on the accumulation of utrophin by cultured normal and dystrophic human skeletal muscle satellite cells. Neuromusc Disord 5:105-114 Passaquin AC, Lhote P, Ruegg UT(1998). Calcium influx inhibition by steroids and analogs in C2C12 skeletal muscle cells. Br J Pharmacol 124(8):1751-9 Quinlivan R, Roper H, Davie M, Shaw NJ, McDonagh J, Bushby K. Report of a Muscular Dystrophy Campaign funded workshop Birmingham, UK, January 16th 2004. Osteoporosis in Duchenne muscular dystrophy; its prevalence, treatment and prevention. Neuromuscul Disord. 2005 Jan;15(1):72-9. Rahman MM, Hannan MA, Mondol BA, Bhoumick NB, Haque A. Prednisolone in Duchenne muscular dystrophy. Bangladesh Med Res Counc Bull. 2001 Apr;27(1):38-42 Reitter B (1995). Deflazacort vs. prednisone in Duchenne muscular dystrophy: trends of an ongoing study. Brain Dev. 17 Suppl:39-43. Rifai Z, Welle E, Moxley RT. et al (1995). Effect of prednisolone on protein metabolism in Duchenne muscular dystrophy. Am J Physiol 268:E67-E74 Sansome A, Royston P, Dubowitz V (1993). Steroids in Duchenne muscular dystrophy; Pilot study of a new low- dosage schedule. Neuromusc Disord 3:567-569 Scott OM, Hyde SA, Goddard C, Dubowitz V (1982). Quantitation of muscle function in children: a prospective study in Duchenne muscular dystrophy. Muscle Nerve 1982 ;5:291-301 Siegel IM, Miller JE, Ray RD (1974). Failure of corticosteroid in the treatment of Duchenne (pseudo-hypertrophic) muscular dystrophy. Report of a clinically matched three year double-blind study. IMJ Ill Med J. 145:32-3 Talim B, Malaguti C, Gnudi S et al. (2002) Vertebral compression in Duchenne muscular dystrophy following deflazacort. Neuromuscul Disord. 12:294-5. Winter K, Schara U, Mortimer J, Liersch R, Mortier W (1999). Duchenne muscular dystrophy with long term steroid Approved July 2019 Review July 2022 NSD610-018.23 V1 Page 24 of 38
therapy. Absence of cardiac side effects. Acta Myologica III:159162 WM, Pandya S, Robison J, Schierbecker J, et al (1989). Duchenne muscular dystrophy: patterns of clinical progression and effects of supportive therapy. Neurology, 39:475-81. Wong BL, Christopher C. (2002) Corticosteroids in Duchenne muscular dystrophy: a reappraisal. J Child Neurol.17:183-90 Appendix 2 Scottish Muscle Network - Guideline for the Management of Bone Mineral Density Problems in Boys with Duchenne Muscular Dystrophy Introduction Duchenne Muscular Dystrophy (DMD) is the most common muscular dystrophy of boys, and is characterised by poor muscle function and progressive loss of ability to walk, generally with patients becoming wheelchair bound by teenage years. Children and young people with poor mobility are at increased risk of osteoporosis and pathological fractures. There is good evidence that corticosteroids given to ambulant boys with DMD improve muscle function, at least in the short term1. Most boys with DMD will be started on corticosteroids, either on intermittent pulse therapy or continuous treatment. Long term use of corticosteroids and prolonged poor mobility are independent risk factors for pathological fracture. Over time as children get older and, possibly, less mobile, bone mineral density (BMD) falls in DMD and this fall may be most marked in those treated with corticosteroids2. Bone mineral density can be measured by a Dual Energy X-ray Absorptiometry (DXA) scanner and this service is available in most large hospitals for monitoring osteoporosis in the elderly. However, for children, the results should be interpreted by a clinician or paediatrician with a knowledge of DXA scans in children. There is evidence in adult practice that prophylactic use of bisphosphonates may be beneficial (3) but insufficient evidence exists for this in children, and is not currently recommended. This guideline is based on consensus between local and regional paediatricians with interests in neuromuscular disorders and metabolic bone disease. Aim The aim of this guideline is to maintain health, mobility and function as much as possible, by promoting bone health, measuring bone mineral density and treating those with fractures. Approved July 2019 Review July 2022 NSD610-018.23 V1 Page 25 of 38
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