Description of a Novel Patch Pump for Insulin Delivery and Comparative Accuracy Evaluation

Area of Science:

• Biomedical Engineering
• Diabetes Technology

Background:

• Continuous subcutaneous insulin infusion (CSII) is crucial for diabetes management.
• Existing insulin patch pumps and durable pumps have varying accuracy profiles.
• A new insulin patch pump design integrating reusable and disposable components was developed.

Purpose of the Study:

• To evaluate the accuracy of a newly developed insulin patch pump.
• To compare the new pump's basal rate and bolus delivery accuracy against existing patch and durable insulin pumps.

Main Methods:

• A microgravimetric method was employed to assess insulin delivery accuracy.
• Boluses of 0.2 U, 1 U, and 7 U were tested.
• Basal rate delivery at 1 U/h was evaluated over 1-hour intervals.

Main Results:

• All tested insulin pumps demonstrated increased bolus accuracy with larger delivered volumes.
• Median deviations in insulin delivery were similar across the new patch pump, existing patch pump, and durable pump.
• Significant differences were observed in the precision of individual bolus deliveries and basal rate accuracy when divided into hourly segments.

Conclusions:

• The new insulin patch pump exhibits comparable median accuracy to existing devices.
• Precision in bolus delivery and hourly basal rate accuracy present areas for further optimization in the new pump design.
• This study provides valuable data for the development of advanced insulin delivery systems.