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IMPACT OF X-RAY EXPOSURE FROM COMPUTED TOMOGRAPHY (CT) ON A WEARABLE INSULIN DELIVERY DEVICE
Abstract
Background and Aims
Wearable insulin delivery devices are popular among people living with diabetes. However, manufacturer’s instructions for use requires the device be removed during a radiological procedure, which adds cost and inconvenience since the device cannot be reused. The aim of this study was to investigate the impact of radiation exposure from a CT scanner on the functionality and integrity of a wearable insulin delivery device.
Methods
One-hundred and sixty Omnipod DASH® Pods (Insulet, Acton, MA) were evenly divided into 4 groups: 1) control group (not irradiated); 2) typical exposure group (within a radiation field of a CT scan for an average patient size); 3) high exposure group (4x typical exposure); 4) scatter radiation group (indirect exposure outside the radiation field used for the high exposure group). The devices were placed on the abdomen (for direct exposure) and shoulder (for scatter radiation) regions of an anthropomorphic torso phantom (see Figure below). The functionality and integrity testing includes communication (activation, deactivation, and status update) and insulin delivery (basal delivery, bolus delivery, suspension and resume).
Results
All Pods passed the functionality and integrity tests, except for one from the scatter radiation group which alarmed during testing. An investigation identified the alarm was due to an occlusion in the insulin delivery path, not caused by radiation exposure.
Conclusions
Radiation exposures (direct or indirect) from a CT scanner had no impact on the functionality and integrity of Omnipod DASH Pods, even under the direct irradiation from 4x typical exposure in the abdomen/pelvis region.