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Related Experiment Videos

Modified hospital pumps for pulsed insulin delivery

W J Spencer, W T Corbett, D S Schade

    Medical Progress Through Technology
    |April 1, 1980
    PubMed
    Summary

    Modified hospital pumps offer bimodal insulin delivery, acting as artificial beta cells for improved glycemic control in diabetics. This pulsed insulin delivery system enhances fasting and post-meal glucose management.

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    Area of Science:

    • Biomedical Engineering
    • Endocrinology
    • Diabetes Technology

    Background:

    • Diabetes management requires precise insulin delivery to maintain glycemic control.
    • Existing insulin pumps may not fully address dynamic glucose fluctuations, especially during meals.
    • Artificial beta cell systems aim to automate and optimize insulin therapy.

    Purpose of the Study:

    • To modify standard hospital insulin pumps for bimodal insulin delivery, simulating an artificial beta cell function.
    • To evaluate the efficacy of this pulsed insulin delivery system in managing glycemic control in diabetic patients.
    • To assess the system's ability to provide both basal and meal-time insulin infusion rates.

    Main Methods:

    • Standard hospital insulin pumps were modified to enable bimodal insulin delivery (basal and burst rates).
    • The system allows programmable basal rates (1-3 mL/hr) and high burst rates (10-20x basal) with timed return to basal.
    • Delivery was tested via intravenous and intraperitoneal routes in animal models and human patients.

    Main Results:

    • The bimodal insulin delivery system demonstrated improved glycemic control in diabetic patients.
    • Normalization of plasma-free insulin levels was observed in juvenile-onset diabetics.
    • The system provided flexibility in managing various glycemic challenges through adjustable pumping rates.

    Conclusions:

    • Modified hospital pumps can function as open-loop artificial beta cells, offering bimodal insulin delivery.
    • Pulsed insulin delivery improves glycemic control and insulin level normalization in diabetics.
    • This approach offers a flexible treatment option for diverse glycemic management needs.

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