A Comparative Pulse Accuracy Study of Two Commercially Available Patch Insulin Infusion Pumps
Background: Patch pumps are a relatively new method of Insulin delivery. This study explores the accuracy of patch pumps by reporting on comparative pulse accuracy study of two patch pumps. Methods: The accuracy of two patch pumps (Cellnovo, [Cellnovo Ltd. Swansea, UK] and OmniPod(r) [Ypsomed Ltd, Escrick, UK] was evaluated micro gravimetrically. Pulse accuracy was analysed by comparing single and time averaged pulses for each device. Results: Single pulses outside accuracy thresholds 5% 10% 15% 20% 25% and 30% were: Cellnovo; 79.6% 55.6% 35.0% 19.9% 9.7% and 4.3% OmniPod; 86.2% 71.6% 57.4% 45.5% 35.2% and 25.4% For 10, 20 and 40 pulse windows mean values outside 15% accuracy level were: Cellnovo; 7.3% 1.5% and 0.4% OmniPod; 37.6% 31.8% and 25.9. Conclusions: This study showed that not all patch pumps are the same. The pumping mechanisms employed in these pumps play a significant role in the accuracy and precision of such devices.
European endocrinology