Troy, N.Y. Changing the hue of hospital gowns and bed sheets to match a patient's skin color could greatly enhance a physician's ability to detect cyanosis and other health-related skin color changes, according to a new study from Rensselaer Polytechnic Institute.
"If a doctor sees a patient, and then sees the patient again later, the doctor will have little or no idea whether the patient's skin has changed color," said neurobiologist and study leader Mark Changizi, assistant professor in the Department of Cognitive Science at Rensselaer. "Small shifts in skin color can have tremendous medical implications, and we have proposed a few simple tools skin-colored gowns, sheets, and adhesive tabs that could better arm physicians to make more accurate diagnoses."
Human eyes evolved to see in color largely for the purpose of detecting skin color changes such as when other people blush, Changizi said. These emotive skin color changes are extremely apparent because humans are hard-wired to notice them, and because the background skin color remains unchanged. The contrast against the nearby "baseline" skin color is what makes blushes so noticeable, he said.
Human skin also changes color as a result of hundreds of different medical conditions. Pale skin, yellow skin, and cyanosis a potentially serious condition of bluish discoloration of the skin, lips, nails, and mucous membranes due to lack of oxygen in the blood are common symptoms. These color changes often go unnoticed, however, because they often involve a fairly universal shift in skin color, Changizi said. The observer in most instances will just assume the patient's current skin color is the baseline color. The challenge is that there is no color contrast against the baseline for the observer to pick up on, as the baseline skin color has changed altogether.
(To hear Changizi address the age-old question of why human veins look blue, see: http://blogger.rpi.edu/approach
|Contact: Michael Mullaney|
Rensselaer Polytechnic Institute