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J Clin Outcomes Manage
2008 Apr;15(4):179-181
Isopropyl alcohol left on the skin falsely lowers capillary glucose values
Ferretti J, Martin KD
Abstract Objective: To evaluate the effect of isopropyl alcohol left on the skin during portable capillary blood glucose testing. Methods: Two capillary blood samples from 2 different fingers were obtained from 192 volunteers. The first finger was prepped with alcohol and the second finger had no preparation. The 2 samples were obtained within 2 minutes of each other and in most cases from the same hand. Results: Capillary blood glucose samples obtained from the finger prepped with alcohol yielded a consistently lower blood glucose level than those taken from the finger with no prep (mean difference, –10.44 points; P < 0.005). Conclusion: Capillary blood glucose testing should be performed without prepping the skin with alcohol.
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