Five-day programmed intraperitoneal insulin delivery in insulin-dependent diabetic man

Area of Science:

• Endocrinology
• Metabolic Disorders
• Diabetes Management

Background:

• Insulin-dependent diabetes mellitus (Type 1 diabetes) requires exogenous insulin for glycemic control.
• C-peptide negativity indicates a lack of endogenous insulin production.
• Traditional insulin delivery methods may not always achieve optimal glycemic control and physiological insulin profiles.

Purpose of the Study:

• To assess the feasibility of continuous programmed intraperitoneal (IP) insulin infusion for glycemic control.
• To evaluate the effectiveness of IP insulin delivery in insulin-dependent, C-peptide-negative diabetic individuals.
• To determine if IP insulin can normalize plasma free insulin profiles.

Main Methods:

• A 5-day study involving 10 insulin-dependent, C-peptide-negative diabetic subjects.
• Insulin delivered via a transcutaneous IP catheter connected to a portable, programmable insulin pump.
• Plasma glucose, free insulin, and C-peptide levels monitored at 16 intervals daily.
• Standard ADA diets provided, with insulin dosage adjusted for glycemia and caloric intake.

Main Results:

• Continuous IP insulin infusion successfully maintained glycemic control over the 5-day study period.
• Normalization of plasma free insulin profiles was achieved, with insulin peaks coinciding with meal-induced glucose rises.
• Subjects maintained normal daily activities, indicating the practicality of the delivery system.

Conclusions:

• The peritoneum is a suitable site for insulin delivery in C-peptide-negative diabetic patients.
• Continuous programmed IP insulin infusion offers a promising alternative for managing insulin-dependent diabetes.
• This approach can lead to improved glycemic control and more physiological insulin profiles.