A simulation study to determine optimal insulin priming during glucose clamp studies

Area of Science:

• Endocrinology
• Metabolic Research
• Computational Biology

Background:

• Hyperinsulinaemic euglycaemic clamp studies (HECS) are vital for assessing insulin sensitivity.
• Accurate insulin kinetics modeling is essential for reliable HECS results.
• Patients with non-insulin-dependent diabetes mellitus often require optimized HECS protocols.

Purpose of the Study:

• To investigate the impact of different insulin priming strategies on glucose uptake equilibrium during HECS.
• To determine the optimal insulin priming regimen for achieving steady-state glucose uptake within 90 minutes.
• To evaluate the accuracy of conventional priming methods in HECS.

Main Methods:

• Computer simulation using a novel model of insulin kinetics.
• Analysis of glucose uptake and plasma insulin concentration under various priming conditions.
• Comparison of a 10-min, six-fold higher rate insulin infusion priming with bolus and monoexponential-decay priming.

Main Results:

• A 10-min insulin infusion priming at six times the target rate achieves glucose uptake equilibrium within 90 minutes.
• Alternative priming regimens (bolus, monoexponential-decay) also reach equilibrium but cause higher insulin transients.
• No priming or conventional priming results in only ~80% of equilibrium glucose uptake at 90 minutes.

Conclusions:

• Insulin priming is essential for achieving steady-state glucose uptake within 90 minutes in HECS.
• Conventional priming regimens may lead to an underestimation of glucose uptake.
• The simulated 10-min, high-rate insulin infusion priming offers an effective strategy for HECS in non-insulin-dependent diabetes mellitus.