Unintentional use of mistaken insulin products: a retrospective review of poison center data

Measurement of Ambulatory Medication Errors in Children: A Scoping Review

BACKGROUND AND OBJECTIVES

Children use most medications in the ambulatory setting where errors are infrequently intercepted. There is currently no established measure set for ambulatory pediatric medication errors. We have sought to identify the range of existing measures of ambulatory pediatric medication errors, describe the data sources for error measurement, and describe their reliability.

METHODS

We performed a scoping review of the literature published since 1986 using PubMed, CINAHL, PsycINFO, Web of Science, Embase, and Cochrane and of grey literature. Studies were included if they measured ambulatory, including home, medication errors in children 0 to 26 years. Measures were grouped by phase of the medication use pathway and thematically by measure type.

RESULTS

We included 138 published studies and 4 studies from the grey literature and identified 21 measures of medication errors along the medication use pathway. Most measures addressed errors in medication prescribing (n = 6), and administration at home (n = 4), often using prescription-level data and observation, respectively. Measures assessing errors at multiple phases of the medication use pathway (n = 3) frequently used error reporting databases and prospective measurement through direct in-home observation. We identified few measures of dispensing and monitoring errors. Only 31 studies used measurement methods that included an assessment of reliability.

CONCLUSIONS

Although most available, reliable measures are too resource and time-intensive to assess errors at the health system or population level, we were able to identify some measures that may be adopted for continuous measurement and quality improvement.

A Systematic Review on Insulin Overdose Cases: Clinical Course, Complications and Treatment Options

A large overdose of insulin is a serious health matter. Information concerning administration and duration of intravenous (IV) glucose, other treatment options or complications besides hypoglycaemia following large insulin overdoses is not readily apparent from the literature. A systematic search, compilation and review of case reports on insulin overdoses, published 1986-2017, was performed in PubMed, EMBASE, Cochrane and PROSPERO databases. Of 1523 published articles, 45 cases of insulin overdoses were included with a total median insulin dose of 900 international units (IU) (range 26-4800 IU). Hospitalization occurred in 44 cases with a median hospitalization duration of 94 hr (range 12-721 hr), and one-third (n = 15) admitted to the intensive care unit. First-line treatment was IV glucose treatment in 95% of cases. Treatment options besides IV glucose that were reported beneficial included glucagon IV or intramuscular (IM), octreotide IV or IM, surgical excision, hydrocortisone IV and oral intake of complex carbohydrates. Prevalent complications were intermittent cerebral impairment (73%), hypokalaemia (49%), other electrolyte disturbances (42%), and hepatic disturbances (7%) and cardiac toxicity (e.g. cardiac arrhythmia) (9%). Long-term consequences were one case of lasting hypoglycaemic encephalopathy and one death. In conclusion, following large insulin overdoses, in-hospital admission and treatment with IV glucose may be needed for up to a week. Monitoring of electrolytes and hepatic and cardiac functions seems important. Several experimental treatment options may be considered in addition to glucose administration. With appropriate pre- and in-hospital treatment, cases with severe hypoglycaemia and neurologic complications may have a favourable outcome.

Treatment of sulfonylurea and insulin overdose

The most common toxicity associated with sulfonylureas and insulin is hypoglycaemia. The article reviews existing evidence to better guide hypoglycaemia management. Sulfonylureas and insulin have narrow therapeutic indices. Small doses can cause hypoglycaemia, which may be delayed and persistent. All children and adults with intentional overdoses need to be referred for medical assessment and treatment. Unintentional supratherapeutic ingestions can be initially managed at home but if symptomatic or if there is persistent hypoglycaemia require medical referral. Patients often require intensive care and prolonged observation periods. Blood glucose concentrations should be assessed frequently. Asymptomatic children with unintentional sulfonylurea ingestions should be observed for 12 h, except if this would lead to discharge at night when they should be kept until the morning. Prophylactic intravenous dextrose is not recommended. The goal of therapy is to restore and maintain euglycaemia for the duration of the drug's toxic effect. Enteral feeding is recommended in patients who are alert and able to tolerate oral intake. Once insulin or sulfonylurea-induced hypoglycaemia has developed, it should be initially treated with an intravenous dextrose bolus. Following this the mainstay of therapy for insulin-induced hypoglycaemia is intravenous dextrose infusion to maintain the blood glucose concentration between 5.5 and 11 mmol l(-1) . After sulfonylurea-induced hypoglycaemia is initially corrected with intravenous dextrose, the main treatment is octreotide which is administered to prevent insulin secretion and maintain euglycaemia. The observation period varies depending on drug, product formulation and dose. A general guideline is to observe for 12 h after discontinuation of intravenous dextrose and, if applicable, octreotide.

National estimates of insulin-related hypoglycemia and errors leading to emergency department visits and hospitalizations

IMPORTANCE

Detailed, nationally representative data describing high-risk populations and circumstances involved in insulin-related hypoglycemia and errors (IHEs) can inform approaches to individualizing glycemic targets.

OBJECTIVE

To describe the US burden, rates, and characteristics of emergency department (ED) visits and emergency hospitalizations for IHEs.

DESIGN, SETTING, AND PARTICIPANTS

Nationally representative public health surveillance of adverse drug events among insulin-treated patients seeking ED care (National Electronic Injury Surveillance System-Cooperative Adverse Drug Event Surveillance project) and a national household survey of insulin use (the National Health Interview Survey) were used to obtain data from January 1, 2007, through December 31, 2011.

MAIN OUTCOMES AND MEASURES

Estimated annual numbers and estimated annual rates of ED visits and hospitalizations for IHEs among insulin-treated patients with diabetes mellitus.

RESULTS

Based on 8100 National Electronic Injury Surveillance System-Cooperative Adverse Drug Event Surveillance cases, an estimated 97,648 (95% CI, 64,410-130,887) ED visits for IHEs occurred annually; almost one-third (29.3%; 95% CI, 21.8%-36.8%) resulted in hospitalization. Severe neurologic sequelae were documented in an estimated 60.6% (95% CI, 51.3%-69.9%) of ED visits for IHEs, and blood glucose levels of 50 mg/dL (to convert to millimoles per liter, multiply by 0.0555) or less were recorded in more than half of cases (53.4%). Insulin-treated patients 80 years or older were more than twice as likely to visit the ED (rate ratio, 2.5; 95% CI, 1.5-4.3) and nearly 5 times as likely to be subsequently hospitalized (rate ratio, 4.9; 95% CI, 2.6-9.1) for IHEs than those 45 to 64 years. The most commonly identified IHE precipitants were reduced food intake and administration of the wrong insulin product.

CONCLUSIONS AND RELEVANCE

Rates of ED visits and subsequent hospitalizations for IHEs were highest in patients 80 years or older; the risks of hypoglycemic sequelae in this age group should be considered in decisions to prescribe and intensify insulin. Meal-planning misadventures and insulin product mix-ups are important targets for hypoglycemia prevention efforts.