Chief Cushie ~MaryO~ Posted January 22, 2008 Chief Cushie Report Share Posted January 22, 2008 LONG URL Evaluation of the Pituitary Function with Insulin Tolerance (Hypoglycaemia) Testing: Are There Any Differences Using Insulin Lispro Compared to Regular Insulin? Kevin C.J. Yuena, Rakesh Aminb, Marie B. Cooka, Sharon A. Rhoadsa, David M. Cooka Department of Endocrinology, Oregon Health and Science University, Portland, Oreg., USA; Department of Endocrinology, Royal Manchester Children's Hospital, Manchester, UK Horm Res 2008;69:233-239 (DOI: 10.1159/000113024) Key Words * Insulin tolerance test * Hypoglycaemia * Insulin lispro * Regular insulin Abstract Background/Aim: The insulin tolerance test (ITT) remains the gold standard for evaluating the pituitary function, but has potential risks when hypoglycaemia is induced. There are scarce data using short-acting insulin analogs for ITTs. This pilot study compares the effects of insulin lispro (LPI) with regular insulin (RGI) during an ITT. Methods: Patients with suspected hypopituitarism (n = 103) randomly received either LPI (n = 51) or RGI (n = 52). Results: All patients reported signs and symptoms when hypoglycaemia was induced. In the LPI group, hypoglycaemia occurred sooner (23.6 ? 1.6 vs. 28.3 ? 1.4 min, p < 0.05), and duration of hypoglycaemia (25.0 ? 1.7 vs. 31.9 ? 1.9 min, p < 0.05) and time for blood glucose levels to return to a 'safe' level (>3.3 mmol/l; 56.5 ? 2.3 vs. 76.0 ? 2.1 min, p < 0.001) were shorter as compared with the RGI group. No differences in peak growth hormone and cortisol levels were observed between the two groups. Conclusions: Our data suggest that despite inducing similar symptomatology, LPI exerted a quicker onset and a shorter duration of hypoglycaemia as compared with RGI. Thus, using LPI might reduce the potential risks associated with an ITT by shortening the hypoglycaemic phase of the test. Copyright ? 2008 S. Karger AG, Basel Author Contacts Dr. Kevin C.J. Yuen Department of Endocrinology, Oregon Health and Science University 3181 SW Sam Jackson Park Road, mailcode L607 Portland, OR 97239-3098 (USA) Tel. +1 503 494 0175, Fax +1 503 494 6990, E-Mail firstname.lastname@example.org Article Information Received: December 11, 2006 Accepted: June 7, 2007 Published online: January 21, 2008 Number of Print Pages : 7 Number of Figures : 1, Number of Tables : 2, Number of References : 36 Free Abstract Article (Fulltext) Article (PDF 164 KB) Link to comment Share on other sites More sharing options...
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