PMID: 11902343Mar 21, 2002Paper

Eliminating the issue of skin color in assessment of the blanch response

Advances in Skin & Wound Care
Anna MatasHenry H Mantsch

Abstract

The high melanin concentration in dark skin prevents the observation of a blanch response to light finger pressure. The objective of this study was to determine the ability of visible and near-infrared spectroscopy (the technique used in pulse oximetry) to monitor a blanch response from in vivo spectra in individuals with light and dark skin, based on changes in blood volume. A quasi-experimental repeated measures design was employed. A stepper motor with an attached spectrophotometer probe was used to deliver controlled pressure to the participants' forearms, mimicking the finger-blanching test. Visible and near-infrared spectra were acquired throughout the blanching cycle. The In Vivo Tissue Optics Lab at the Institute for Biodiagnostics, Winnipeg, Manitoba, Canada. A convenience sample of 10 healthy light-skinned individuals and 10 healthy dark-skinned individuals. Determined by analysis of the spectra, the 2 groups differed in pigmentation in both the visible (P<.01) and near-infrared (P<.01) regions of the absorbance spectrum. There was a significant difference in total hemoglobin at high and low pressure in both the visible (P<.01) and near-infrared (P<.05) regions. The observation of a significant difference in total hem...Continue Reading

References

Jan 1, 1986·Photochemistry and Photobiology·N Kollias, A Baqer
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Dec 1, 1996·Archives of Otolaryngology--head & Neck Surgery·R E HaydenB Chance
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Citations

Jun 1, 2005·The Nursing Clinics of North America·Joann Maklebust
Dec 20, 2008·Advances in Skin & Wound Care·Richard Salcido
Aug 29, 2009·Advances in Skin & Wound Care·Carol Dealey
Dec 2, 2009·Journal of Forensic Nursing·Marilyn S SommersTherese M Zink
Aug 28, 2020·Journal of Clinical Nursing·Neesha Oozageer GunowaDebra Jackson
Aug 18, 2020·International Journal of Pediatric Otorhinolaryngology·Joel W JonesBrian K Reilly

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