Evaluation of Glucose Monitoring Devices in the Hyperbaric Chamber

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Abstract
Diabetic patients may experience fluctuations in whole blood glucose (WBG) levels while receiving hyperbaric oxygen therapy (HBO) resulting in seizure-like activity. Therefore, hyperbaric medical attendants must accurately monitor the WBG levels of these patients during HBO. In addressing this concern, this study evaluated the accuracy and reliability of commercially available glucometers (Glucometer M+, Companion 2, HemoCue, One Touch II, and ExacTech Pen) in the hyperbaric environment. WBG samples were prepared, ranging from 25 to 250 mg/dl, for testing glucometers at ground level and at 2.36 atmospheres absolute (ATA). It was noted that at 2.36 ATA, glucose values increased using the Glucometer M+, but decreased with the Companion 2 and HemoCue. The One Touch II values decreased in the hyperglycemic ranges (<150 mg/dl), whereas the ExacTech Pen monitor readings increased in the hypoglycemic ranges (<100 mg/dl). The accuracy of WBG monitors is significantly affected by changes in atmospheric pressure.

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