Insulin pump therapy vs. multiple daily injections in obese Type 2 diabetic patients

J. Wainstein, M. Metzger, M. Boaz, O. Minuchin, Y. Cohen, A. Yaffe, Y. Yerushalmy, Itamar Raz, I. Harman-Boehm

Research output: Contribution to journalArticlepeer-review

110 Scopus citations


Aims: To compare the efficacy of insulin pump treatment with multiple daily injections in the treatment of poorly controlled obese Type 2 diabetic patients already receiving two or more daily injections of insulin plus metformin. Methods: Forty obese Type 2 diabetic subjects (using insulin) were randomized to treatment with continuous subcutaneous infusion pump (CSII) (Minimed®) or multiple daily insulin injections (MDI). At the end of the first 18-week treatment period, patients underwent a 12-week washout period during which they were treated with MDI plus metformin. They were then crossed-over to the other treatment for an 18-week follow-up period. Patients performed 4-point daily self blood-glucose monitoring (SBGM) on a regular basis and 7-point monitoring prior to visits 2, 8, 10 and 16. A subset of patients underwent continuous glucose monitoring using the Minimed® continuous glucose monitoring system (CGMS) at visits 2, 8, 10 and 16. A standard meal test was performed in which serum glucose was tested at fasting and once each hour for 6 h following a test meal. Glucose levels were plotted against time and the area under the curve (AUC) was calculated. HbA1c, weight, daily insulin dose and hypoglycaemic episodes were recorded. Results: In obese Type 2 diabetic patients already treated with insulin, treatment with CSII significantly reduced HbA1c levels compared with treatment with MDI. An additional CSII treatment benefit was demonstrated by reduced meal-test glucose AUG. Initial reduction of daily insulin requirement observed in CSII-treated subjects during the first treatment period was attributable to a period effect and did not persist over time. Conclusions: In the intent-to-treat analysis, CSII appeared to be superior to MDI in reducing HbA1c and glucose AUC values without significant change in weight or insulin dose in obese, uncontrolled, insulin-treated Type 2 diabetic subjects.

Original languageEnglish
Pages (from-to)1037-1046
Number of pages10
JournalDiabetic Medicine
Issue number8
StatePublished - 1 Aug 2005
Externally publishedYes


  • Insulin
  • Obese
  • Pump
  • Type 2 diabetes

ASJC Scopus subject areas

  • Internal Medicine
  • Endocrinology, Diabetes and Metabolism
  • Endocrinology


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