Safety of the insulin tolerance test

Area of Science:

• Pediatric Endocrinology
• Diagnostic Testing
• Endocrine Disorders

Background:

• The insulin tolerance test (ITT) is a standard diagnostic tool for assessing growth hormone (GH) secretion.
• Concerns exist regarding the safety and potential hazards associated with the ITT.
• Establishing the safety and efficacy of ITT in pediatric populations is crucial.

Purpose of the Study:

• To evaluate the safety and outcomes of the insulin tolerance test (ITT) in a pediatric cohort over a 10-year period.
• To assess the incidence of adverse events associated with ITT in children.
• To determine the reliability of ITT in diagnosing growth hormone deficiency (GHD).

Main Methods:

• Retrospective review of 550 insulin tolerance tests (ITTs) performed between 1989 and 1999.
• Analysis of adverse events, including seizures and need for intravenous glucose.
• Evaluation of test yield for growth hormone (GH) deficiency over time.

Main Results:

• No serious adverse events were recorded during 550 ITTs.
• No pediatric patient experienced seizures or required intravenous glucose.
• A decrease in test frequency in later years correlated with a higher diagnosis rate of GH deficiency, indicating a more selective approach.

Conclusions:

• The insulin tolerance test (ITT) is a safe and reliable diagnostic procedure for pediatric patients when conducted under a strict protocol.
• Adherence to standardized procedures is paramount for minimizing risks associated with ITT.
• The findings support the continued use of ITT in pediatric endocrinology for accurate GH assessment.