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CHAPTER 17

ACUTE METABOLIC
COMPLICATIONS IN DIABETES
Arleta Rewers, MD, PhD

Dr. Arleta Rewers is Associate Professor, Department of Pediatrics at University of Colorado Denver School of Medicine, Aurora, CO.

SUMMARY
Diabetic ketoacidosis (DKA), hyperglycemic hyperosmolar state (HHS), lactic acidosis (LA), and hypoglycemia are acute and potentially
life-threatening complications of diabetes. DKA and severe hypoglycemia are more common in type 1 diabetes, while HHS without
ketoacidosis is associated more frequently with type 2 diabetes. In the United States, the SEARCH for Diabetes in Youth study reported
that 29% of patients age 11.10 mmol/L]) also meets criteria for
1 diabetes, particularly at the time of diag-   gastrointestinal illness, trauma and stress,   DKA. Combination of near-normal glucose
nosis. DKA is less common at diagnosis          or pump failure can precipitate DKA. In        levels and ketoacidosis (“euglycemic
and during the course of type 2 diabetes.       type 2 diabetes patients, DKA occurs           ketoacidosis”) has been reported in preg-
                                                during concomitant acute illness or during     nant adolescents, very young or partially
DKA is caused by very low levels of effec-      transition to insulin dependency.              treated children (5), and children fasting
tive circulating insulin and a concomitant                                                     during a period of insulin deficiency (6).
increase in counterregulatory hormones          DEFINITION
levels, such as glucagon, catecholamines,       The American Diabetes Association (1,2),       Administrative data sets use International
cortisol, and growth hormone. This              the International Society for Pediatric        Classification of Diseases, Ninth Revision
combination leads to catabolic changes          and Adolescent Diabetes (3), and jointly       (ICD-9) or Tenth Revision (ICD-10), codes
in the metabolism of carbohydrates, fat,        the European Society for Paediatric            to categorize diabetes and diabetic
and protein. Impaired glucose utilization       Endocrinology and the Lawson Wilkins           complications. The ICD-9 code for DKA
and increased glucose production by the         Pediatric Endocrine Society (4) agreed to      is 250.1x (250.10–250.13). However, the
liver and kidneys result in hyperglycemia.      define DKA as a triad of:                      code 250.3 (diabetes with other coma) is
Lipolysis leads to increased production                                                        used for DKA coma, as well as for coma
of ketones, especially beta-hydroxybu-          § hyperglycemia, i.e., plasma glucose          caused by severe hypoglycemia. In the
tyrate (β-OHB), ketonemia, and metabolic          >250 mg/dL (>13.88 mmol/L)                   ICD-10 categories for diabetes (E10–E14),
acidosis, which is exaggerated by ongoing       § venous pH
DIABETES IN AMERICA, 3rd Edition

The incidence of DKA varies with the           was found less frequently as the initial     first-degree relative with type 1 diabetes,
definition; therefore, it is important to      manifestation of diabetes. DKA was           shows a protective effect. A similar protec-
standardize criteria for comparative epide-    present at diagnosis in 20% of patients in   tive effect is observed among children
miologic studies.                              the Rhode Island Hospital Study, which       involved in longitudinal etiological studies.
                                               was population based (24). A community-      In addition, medications (glucocorticoids,
PREVALENCE OF DIABETIC                         based Rochester, Minnesota, study found      atypical antipsychotics, and diazoxide)
KETOACIDOSIS AT THE                            that 23% of diabetes patients presented      can contribute to precipitation of DKA in
DIAGNOSIS OF DIABETES                          with DKA as the initial manifestation. DKA   individuals without a previous diabetes
In the United States, the large, popula-       was more frequent in patients diagnosed      diagnosis (33,34).
tion-based SEARCH for Diabetes in Youth        before age 30 years, reaching 26%,
study reported that 29% of patients with       and was present in only 15% of those         Most episodes of DKA beyond
type 1 diabetes age
Acute Metabolic Complications in Diabetes

to acute complications among diabetic           TABLE 17.1. Hospitalizations for Acute Complications of Diabetes, by Age, U.S.,
patients between 2001 and 2010                  2001–2010
(Table 17.1) decreased compared to the
                                                                                              AVERAGE ANNUAL                           PERCENT (SE)
time period 1981–1991 (46), except                   ACUTE COMPLICATIONS                    NUMBER OF DISCHARGES                    OF TOTAL* DIABETES
for an increase in hospitalizations due            (ICD-9-CM), BY AGE (YEARS)                   (THOUSANDS)                            DISCHARGES
to acidosis. This finding may reflect an         Diabetic ketoacidosis (250.1)
increase in the rates of lactic acidosis (LA)      All                                                   157.7                              3.0 (0.05)
among patients with underlying diabetes
DIABETES IN AMERICA, 3rd Edition

TABLE 17.2. Annual Hospitalizations for Diabetic Ketoacidosis and Diabetic Coma, by Age, Sex, and Race, U.S., 2001–2010
                                                                               DIABETIC KETOACIDOSIS                                   DIABETIC COMA NEC

                             DIABETES      ALL                                                 Percent (SE)                                           Percent (SE)
                            DISCHARGES DISCHARGES*                                     Among All                                              Among All
                            (NUMBER IN (NUMBER IN                    Number             Diabetes         Among All          Number             Diabetes         Among All
 CHARACTERISTICS            THOUSANDS) THOUSANDS)                  (Thousands)         Discharges        Discharges       (Thousands)         Discharges        Discharges
 Total                           5,180             38,619              157.7            3.0 (0.05)        0.4 (0.01)            7.9            0.2 (0.01)       0.02 (0.002)
 Age (years)
   30%–40%
2 Relative standard error >40%–50%
3 Estimate is too unreliable to present; ≤1 case or relative standard error >50%.

SOURCE: National Hospital Discharge Surveys 2001–2010

among those without DKA. As DKA is                          visits for DKA was 64 per 10,000 U.S.                       polydipsia, polyuria, and polyphagia with
treated primarily in hospital settings, the                 diabetic patients, and the number of visits                 weight loss, is the best strategy for early
inpatient expenditures attributed to DKA                    increased between 1993–1998 (315,000)                       detection of type 1 diabetes and preven-
accounted for >90% of the total excess                      and 1999–2003 (438,000) (65).                               tion of DKA at the time of diagnosis.
medical expenditures attributed to DKA                                                                                  Both public and health professional
(63). Among adults with type 1 diabetes,                    During 2004, there were 120,000                             education should make people aware of
reported medical expenditures are twice                     admissions due to DKA, 15,000 due to                        those symptoms, as patients admitted
as high ($13,046 [2007 dollars]), most                      hyperosmolar hyperglycemic state (HHS),                     with severe DKA are often seen hours
likely due to coexisting comorbidities (62).                and an additional 5,000 due to “diabetic                    or days earlier by health care providers
Tieder et al. examined a retrospective                      coma” (66). Based on the Diagnostic                         who missed the diagnosis, particularly
cohort of children age 2–18 years with                      Related Group codes in the inpatient                        in the youngest children (69,70). The
a diagnosis of DKA between 2004 and                         records, the total hospital cost for DKA                    Diabetes Autoimmunity Study in the
2009. The mean hospital-level total                         was estimated at $1.4–$1.8 billion.                         Young, an observational study following
standardized cost of DKA treatment was                      An independent analysis by Kitabchi et al.                  children at genetically high risk for type 1
$7,142 (64).                                                estimated the annual hospital cost of DKA                   diabetes by periodic testing for diabetes
                                                            in the United States in excess of $1 billion                autoantibodies, glycosylated hemo-
According to National Hospital Ambulatory                   (67). Approximately 25% of the cost is                      globin (A1c), and random blood glucose,
Medical Care Surveys between 1993 and                       related to DKA at diabetes diagnosis (68).                  demonstrated that prevention of DKA
2003, DKA accounted for approximately                                                                                   in newly diagnosed children is possible.
753,000 visits or an average 68,000 visits                  PREVENTION                                                  The prevalence of DKA at the time of
per year. The majority of DKA patients                      Prevention of DKA should be one of                          diagnosis among children enrolled in this
(87%) were admitted, with most admis-                       the main goals of diabetes education.                       study was significantly lower compared
sions to a non-intensive care unit setting.                 Knowledge of the signs and symptoms                         to the community level (71). Similar find-
The rate of emergency department                            of diabetes, such as the classic triad of                   ings came from the Diabetes Prevention

17–4
Acute Metabolic Complications in Diabetes

Trial (72). A community intervention to        In adults, in the absence of cardiac compro-                              administration of an initial intravenous dose
raise awareness of the signs and symp-         mise, isotonic saline is given at a rate of                               of regular insulin (0.1 units/kg) followed
toms of childhood diabetes in the Parma        15–20 mL/kg per hour or 1–1.5 L during                                    by the infusion of 0.1 units/kg per hour.
region of Italy reduced the prevalence of      the first hour. Subsequent fluid replace-                                 A prospective randomized study reported
DKA at diagnosis of type 1 diabetes from       ment depends on hemodynamic status,                                       that a bolus dose of insulin is not necessary,
83% to 13% (73). The effect persisted 8        serum electrolyte levels, and urinary output.                             if patients receive an hourly insulin infusion
years later, but there was an indication       Treatment algorithms recommend the                                        of 0.14 units/kg body weight (82).
that the campaign should be periodically
renewed (74).
                                               FIGURE 17.1. Trends in Age-Standardized Mortality Rate Coded to Diabetic Ketoacidosis
                                               Per 100,000 People With Diabetes, U.S., 2000–2009
Most studies have shown that most
episodes of DKA beyond disease                                                                       Underlying cause*             Multiple causes†
diagnosis are preventable by identification                                        25
of at-risk patients and use of targeted

                                                    Mortality rate (per 100,000)
interventions. Comprehensive diabetes                                              20
programs and telephone help lines
reduced the rates of DKA from 15–60                                                15
to 5–6 per 100 patient-years (75,76,77).
                                                                                   10
In the adolescent cohort of the Diabetes
Control and Complications Trial (DCCT),                                             5
intensive diabetes management was
associated with less DKA (conventional                                              0
and intensive treatment groups: 4.7                                                     2000 2001   2002 2003 2004 2005 2006 2007 2008 2009
                                                                                                                 Year
and 2.8 episodes per 100 patient-years,
respectively) (78). In patients treated with   Ketoacidosis is defined as International Classification of Diseases, Tenth Revision (ICD-10), codes E10.1, E11.1,
insulin pumps, episodes of DKA can be          E12.1, E13.1, or E14.1. Data are standardized to the National Health Interview Survey 2010 diabetes population
                                               using age categories
DIABETES IN AMERICA, 3rd Edition

HYPERGLYCEMIC HYPEROSMOLAR STATE
PATHOGENESIS                                    disease, and cancer, seems to be respon-       controls) to be independently associated
Decrease in the effective action of circu-      sible for the higher mortality associated      with the presence of HHS (95). Among
lating insulin coupled with a concomitant       with HHS compared to DKA (86).                 200 HHS patients in Rhode Island,
elevation of counterregulatory hormones                                                        nursing home residents accounted for
is the underlying mechanism for both            The incidence of HHS is most likely under-     18% of the cases (85).
HHS and DKA. These alterations lead             estimated in children, as the presenting
to increased hepatic and renal glucose          clinical picture in many patients has          MORBIDITY AND MORTALITY
production and impaired glucose utiliza-        elements of both HHS and DKA (87,88).          Hospitalization data from the National
tion in peripheral tissues, which result in                                                    Hospital Discharge Surveys 2001–2010
hyperglycemia and parallel changes in           Several studies of pediatric and               were analyzed for Diabetes in America,
osmolality of the extracellular space (83).     adolescent diabetic patients, mostly case      confirming that HHS occurs rarely (Tables
HHS is associated with glycosuria, leading      series or single-institution reviews, have     17.1 and 17.3). The 18–44 years age group
to osmotic diuresis, with loss of water,        described more than 50 cases of HHS            had the highest percentage of hospital-
sodium, potassium, and other electrolytes.      (7,89,90,91,92). Most patients were            izations listing HHS. The average annual
In HHS, insulin levels are inadequate for       adolescents with newly diagnosed type          number of hospital discharges listing HHS
glucose utilization by insulin sensitive        2 diabetes, and many were of African           as a cause doubled to 23,900 during 2001–
tissues but sufficient (as determined by        American descent. A study based on             2010 compared to 10,800 in 1989–1991.
residual C-peptide) to prevent lipolysis        data from the Kid’s Inpatient Database
and ketogenesis (83).                           provided the first national estimate of        In adults, mortality rates attributed to
                                                hospitalizations due to HHS among              HHS range from 5% to 25% (82,85,86,
DEFINITION                                      U.S. children between 1997 and 2009.           94,96). The mortality increases sharply
HHS is defined as extreme elevation in blood    The estimated population rate for HHS          with age from none in patients age 600 mg/dL (>33.30 mmol/L)              diagnoses for children age 0–18 years          years to 1.2% in those age 35–55 years
and serum osmolality >320 mOsm/kg               was 2.1 per 1,000,000 children in 1997,        and 15.0% in patients age >55 years.
in the absence of significant ketosis and       rising to 3.2 in 2009. The majority (70.5%)    A U.S. study of 613 adult patients hospi-
acidosis. Small amounts of ketones may          of HHS hospitalizations occurred among         talized for hyperglycemic crises reported
be present in blood and urine (84).             children with type 1 diabetes (93).            similar findings (85). Fatality rates for DKA,
                                                                                               mixed DKA-HHS, and isolated HHS alone
In the ICD-9, the HHS code is 250.2:            RISK FACTORS                                   were, respectively, 4%, 9%, and 12%. In
diabetes with hyperosmolarity or hyper-         The majority of HHS episodes are precip-       both studies, older age and the degree of
osmolar (nonketotic) coma. The ICD-10           itated by an infectious process; other         hyperosmolarity were the most powerful
does not have a specific code for HHS;          precipitants include cerebrovascular           predictors of a fatal outcome. Deaths
E1x.0 denotes coma with or without keto-        accident, alcohol abuse, pancreatitis,         due to hyperglycemic crisis in adults with
acidosis, hyperosmolar or hypoglycemic          myocardial infarction, trauma, and             diabetes dropped from 2,989 in 1985 to
(x digit is used to define type of diabetes).   drugs. In a case series of 119 patients        2,459 in 2002, according to data from the
                                                with HHS, nearly 60% of the patients           National Vital Statistics System. During
INCIDENCE AND PREVALENCE                        had an infection, and 42% had a stroke         the time period, age-adjusted death rates
The incidence of HHS is unknown because         (94). Medications affecting carbohydrate       decreased from 42 to 24 per 100,000
of the lack of population-based studies         metabolism, such as corticosteroids,           adults with diabetes (97); the decrease
and multiple comorbidities often found in       thiazides, and sympathomimetic agents          was found in all age groups (Figure 17.3)
these patients. Estimated rates of hospital     (e.g., dobutamine and terbutaline), may        (97). During the period between 1997 and
admissions for HHS are lower compared           also precipitate the development of HHS.       2009, the mortality rate among children
to DKA. HHS accounts for
Acute Metabolic Complications in Diabetes

TABLE 17.3. Annual Hospitalizations for Diabetic Hyperosmolar Nonketotic Coma, by Age,                                              PREVENTION AND TREATMENT
Sex, and Race, U.S., 2001–2010                                                                                                      Appropriate diabetes education, adequate
                                                                                                                                    treatment, and frequent self-monitoring
                                                                                                  PERCENT (STANDARD ERROR)
                DIABETIC HYPEROSMOLAR                                                                                               of blood glucose help to prevent HHS
                   NONKETOTIC COMA                                                             Among Diabetes        Among All
CHARACTERISTICS (NUMBER IN THOUSANDS)                                                            Discharges         Discharges*     in patients with known diabetes. HHS
                                                                                                                                    can be precipitated by dehydration and
 Total                                                                         23.9               0.5 (0.02)        0.06 (0.003)
                                                                                                                                    medications, such as corticosteroids,
 Age (years)                                                                                                                        thiazides, and sympathomimetic agents.
   40%–50%
3 Estimate is too unreliable to present; ≤1 case or relative standard error >50%.

SOURCE: National Hospital Discharge Surveys 2001–2010

FIGURE 17.3. Age-Specific Death Rates for Hyperglycemic Crisis Among Persons With
Diabetes Age ≥18 Years, by Age, U.S., 1985–2002

                                                                          18–44 years    45–64 years            ≥65 years
                                                       90

                                                       80
       Death rate (per 100,000 people with diabetes)

                                                       70

                                                       60

                                                       50

                                                       40

                                                       30

                                                       20

                                                       10
                                                        0
                                                                     86                                                  01
                                                              85

                                                                        00
                                                                        90

                                                                        99
                                                                        93
                                                                        94
                                                                        92

                                                                        98
                                                                        89

                                                                                                                            02
                                                                       88

                                                                        95
                                                                        96
                                                                        97
                                                                        87

                                                                        91

                                                                   19                                                 20
                                                            19

                                                                     19

                                                                     19
                                                                     19

                                                                     19

                                                                     19

                                                                     20
                                                                     19
                                                                     19

                                                                     19
                                                                     19

                                                                                                                         20
                                                                     19
                                                                     19
                                                                     19

                                                                     19

                                                                                        Year

Data are based on the National Vital Statistics System 1985–2002. Denominators are based on National Health
Interview Surveys 1985–2002 data.
SOURCE: Reference 97, copyright © 2006 American Diabetes Association, reprinted with permission from The
American Diabetes Association

                                                                                                                                                                          17–7
DIABETES IN AMERICA, 3rd Edition

LACTIC ACIDOSIS
DEFINITION                                                  The frequency of hospitalizations due to                     comparative trials and observational
LA consists of elevation of lactic acid                     LA increased from 0.6% to 1.2% among                         cohort studies showed no difference in
above 5.0 mEq/L with acidosis (pH 0.4–45 years, in women, in whites, and                     contraindicated in conditions associated                     MORBIDITY AND MORTALITY
in patients for whom diabetes was not                       with LA, such as cardiovascular, renal,                      LA leads to neurologic impairment. Rapid
listed on the hospital discharge summary,                   hepatic, and pulmonary diseases, and                         correction of the acid-base and electro-
the percentage of diabetes discharges                       advanced age. However, a Cochrane                            lyte disturbances may induce cerebral
with LA was greater in younger people.                      Database review of prospective                               edema. The mechanism of cerebral

TABLE 17.4. Annual Hospitalizations for Lactic Acidosis, by Diabetes Status, Age, Sex, and Race, U.S., 2001–2010
                                                                   DIABETES                                                               NO DIABETES

                                    Lactic Acidosis                                   Percent (SE)                         Lactic Acidosis                  Percent (SE)
                                     and Diabetes                   Among Diabetes                Among All               and No Diabetes                    Among All
   CHARACTERISTICS               (Number in Thousands)                Discharges                 Discharges*           (Number in Thousands)                 Discharges
 Total                                      65.2                        1.2 (0.03)               0.17 (0.005)                     340.3                      1.02 (0.012)
 Age (years)
   30%–40%

SOURCE: National Hospital Discharge Surveys 2001–2010

17–8
Acute Metabolic Complications in Diabetes

edema in the course of LA is unclear.          PREVENTION AND TREATMENT                       The only effective treatment for LA is
The mortality rates from LA are high and       LA is usually associated with unexpected       cessation of lactic acid production by
associated with higher lactic acid levels.     and catastrophic hypoxic events and is         the improvement of tissue oxygenation.
Based on data from National Hospital           therefore less likely to be amenable to        Treatment of underlying conditions,
Discharge Surveys 2001–2010, LA                preventive measures. Long-term preven-         such as shock or myocardial infarc-
accounts for 1.2% of all hospitalizations      tion of cardiovascular disease or sepsis       tion, includes restoration of the fluid
in diabetic patients (Table 17.4).             among diabetic patients through improved       volume, improvement of cardiac function,
                                               glucose control and alteration of other risk   amelioration of sepsis, and correction of
                                               factors could decrease the incidence of LA.    hyperglycemia (104).

HYPOGLYCEMIA
PATHOGENESIS                                   DEFINITION                                     The DCCT defined severe hypoglycemia as
Hypoglycemia is the most common,               Various definitions of hypoglycemia are in     an episode in which the patient required
life-threatening acute complication of         use; for comparative epidemiologic studies,    assistance with treatment from another
diabetes treatment. It is characterized by     it is important to standardize criteria. The   person to recover; blood glucose level had
multiple risk factors and complex patho-       American Diabetes Association Workgroup        to be documented as
DIABETES IN AMERICA, 3rd Edition

INCIDENCE IN TYPE 1                            agents. However, the risk of hypoglycemia      based on whether they were receiving
DIABETES PATIENTS                              increases with transition to insulin-​         insulin and/or sulfonylureas. Instances of
The incidence of moderate or mild hypo-        dependence. In the United Kingdom              overtreatment were defined as using one
glycemia is unknown; those events are          Prospective Diabetes Study (UKPDS),            of these agents in patients with A1c levels
frequent among patients treated with           the risk of severe hypoglycemia was 1.0        below specific thresholds, such as
Acute Metabolic Complications in Diabetes

uptake, which may result in hypoglycemia                    psychiatric disorders affecting patients and                 30% of patients with type 1 diabetes,
without modification of insulin dose and                    their families have been shown to have                       increase the risk of hypoglycemia
intake of carbohydrates (151).                              significant influence on glycemic control                    (162,163,164,165). In pregnancy with
                                                            and the rate of hypoglycemia. Family                         type 1 diabetes, the incidence of mild and
Alcohol consumption is a significant                        relationships and personality type have                      severe hypoglycemia is highest in early
risk factor for development of severe                       also had a significant effect on adaptation                  pregnancy, although metabolic control
hypoglycemia. Alcohol suppresses                            to illness and metabolic control among                       is usually tighter in the last part of preg-
gluconeogenesis and glycogenolysis                          persons with diabetes (156). Presence of                     nancy. Predictors for severe hypoglycemia
and acutely improves insulin sensitivity                    psychiatric disorders has a detrimental                      are history of severe hypoglycemia and
(152,153) and may induce hypoglycemia                       effect on metabolic control (157,158)                        impaired awareness (166). Chronic kidney
unawareness (154). In combination                           and compliance with treatment (159).                         disease can be found in up to 23% of
with exercise, drinking alcohol can lead                    Prevalence of psychiatric disorders among                    patients with diabetes. Chronic kidney
to severe hypoglycemia with a delay                         patients with type 1 diabetes reached 48%                    disease is an independent risk factor for
of symptoms up to 10–12 hours after                         by 10 years of diabetes duration and age                     hypoglycemia and augments the risk
alcohol consumption (155).                                  20 years in a small longitudinal cohort                      already present in people with diabetes
                                                            (160,161), the most prevalent being major                    (167,168).
Family dynamics, behavioral factors, and                    depressive disorder (28%). Prevalence of
psychiatric factors are important risk                      psychiatric disorders, however, has been                     MORBIDITY AND MORTALITY
factors, particularly in the pediatric popula-              shown to be much lower in other studies,                     A new analysis for Diabetes in America
tion. The DCCT showed that conventional                     as discussed in Chapter 33 Psychiatric and                   of the frequency of hypoglycemia
risk factors explained only 8.5% of the                     Psychosocial Issues Among Individuals                        (ICD-9 codes 250.8 and 251.2) as a
variance in the occurrence of severe hypo-                  Living With Diabetes.                                        discharge diagnosis for hospitalizations
glycemia (117). Factors such as inadequate                                                                               in the United States in 2001–2010 is
diabetes education, low socioeconomic                       Coexisting autoimmune conditions, such                       shown in Tables 17.1 and 17.5, using data
status, lack of insurance, unstable living                  as autoimmune thyroid, celiac, and                           from the National Hospital Discharge
conditions, behavioral factors, and                         Addison’s diseases, occurring in up to                       Survey. Hypoglycemia was listed as

TABLE 17.5. Annual Hospitalizations for Hypoglycemia, by Diabetes Status, Age, Sex, and Race, U.S., 2001–2010
                                                                   DIABETES                                                              NO DIABETES

                                     Hypoglycemia                                    Percent (SE)                          Hypoglycemia                     Percent (SE)
                                     and Diabetes                 Among All Diabetes             Among All                With No Diabetes                   Among All
   CHARACTERISTICS               (Number in Thousands)               Discharges                 Discharges*            (Number in Thousands)                 Discharges
 Total                                      287.6                       5.4 (0.07)              0.74 (0.009)                      28.9                      0.09 (0.003)
 Age (years)
   50%).
AI/AN, American Indian/Alaska Native; ICD-9-CM, International Classification of Diseases, Ninth Revision, Clinical Modification.
* All discharges include patients with diabetes and those without diabetes.
† Twenty-three percent of participants were missing race data.
1 Relative standard error >30%–40%
2 Relative standard error >40%–50%

SOURCE: National Hospital Discharge Surveys 2001–2010

                                                                                                                                                                        17–11
DIABETES IN AMERICA, 3rd Edition

an underlying cause in about 288,000          baseline), while increasing the incidence of    lower A1c levels and improve quality of
hospitalizations, which represented           hypoglycemia, did not lead to a significant     life compared to multiple daily injections
5.4% of hospitalizations due to diabetes.     worsening of neuropsychological or cogni-       of insulin and, of importance, reduce the
Hospital discharges for hypoglycemia in       tive functioning during the trial (186,187),    rate of severe hypoglycemia (193,194).
diabetic patients occurred least often in     as well as 18 years after entry into the
patients age
Acute Metabolic Complications in Diabetes

diabetes management is the development              Behavioral Interventions                            accomplished by giving glucose tablets or
of automatic glucose sensing and insulin           Behavioral interventions, including                  sweetened fluids, such as juice, glucagon
delivery without patient intervention (206).       intensive diabetes education, good                   injection in unconscious patients, or
Studies evaluating closed-loop insulin             access to care, and psychosocial                     dextrose infusion in a hospital setting.
delivery suggest improved glucose control          support, including treatment of
and a decreased risk of hypoglycemia               psychiatric disorders, lower the risk of
(207,208). Data from the Automation to             hypoglycemia (210,211).
Simulate Pancreatic Insulin REsponse
(ASPIRE) study confirmed that use of               TREATMENT
sensor-augmented insulin pump therapy              The goal of treatment of hypogly-
with the threshold-suspend feature                 cemia is to immediately increase the
reduced nocturnal hypoglycemia, without            blood glucose approximately 3–4
increasing A1c values (209).                       mmol/L (~55–70 mg/dL). This can be

     LIST OF ABBREVIATIONS                                                                                 CONVERSIONS
     A1c. . . . . . . . . . . . . . . . . . . glycosylated hemoglobin                                      Conversions for A1c and glucose
     β-OHB . . . . . . . . . . . . . . . . beta-hydroxybutyrate                                            values are provided in Diabetes in
     CSII . . . . . . . . . . . . . . . . . .continuous subcutaneous insulin infusion                      America Appendix 1 Conversions.
     DCCT . . . . . . . . . . . . . . . . . Diabetes Control and Complications Trial
     DKA . . . . . . . . . . . . . . . . . . diabetic ketoacidosis
     HHS . . . . . . . . . . . . . . . . . . hyperglycemic hyperosmolar state
     ICD-9-CM/ICD-10 . . . . . . . International Classification of Diseases, Ninth Revision,               DUALITY OF INTEREST
                                              Clinical Modification/Tenth Revision
                                                                                                           Dr. Rewers reported no conflicts of
     LA . . . . . . . . . . . . . . . . . . .lactic acidosis
                                                                                                           interest.
     SEARCH . . . . . . . . . . . . . .SEARCH for Diabetes in Youth study
     UKPDS. . . . . . . . . . . . . . . .United Kingdom Prospective Diabetes Study

REFERENCES

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