Along with increased usage of continuous glucose monitors, flash glucose monitors, and patch pumps by patients with diabetes, the frequency of skin reactions has also increased. Skin irritation and itching can be annoying to users. However, more serious contact allergies to one or more components of the adhesives or plastic material of the housing of the devices can become lifelong. Redness and itchiness are so strong that patients can no longer use a particular system. In August 2017, a major culprit allergen, isobornyl acrylate (IBOA), was identified for these more serious reactions. Our objective was to evaluate IBOA content in different medical products. The plastic material used for the housing of the Freestyle Libre ( = 3), Dexcom G6 ( = 3), and Enlite ( = 4) was analyzed for IBOA content by gas chromatography-mass spectrometry. Adhesives of the different systems were also analyzed. IBOA was found in the housings of Freestyle Libre and Enlite sensor, but not in the Dexcom G6. Patients with an IBOA allergy should consider switching to a medical product without IBOA. Furthermore, removal of IBOA from devices that contact the skin is encouraged.
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