Abstract
The purpose of this study is to compare mucosal blood flow with mucosal blood volume in human larynx. Subjects were two men who had vocal fold polyps. In laryngomicrosurgery under general anesthesia we measured hemoglobin concentration (IHb) by using spectrophotometric analyzer and measured mucosal blood flow (BF) by using laser speckle flow meter. In normal mucosa of the vocal fold, the mean value of IHb was 25.5 and the mean value of BF was 4.6, whereas in that of the ventricular fold, the mean value of IHb was 72.3 and the mean value of BF was 2.4. The IHb value was lower in the vocal fold than in the ventricular fold, while BF was higher in the vocal fold than in the ventricular fold. In the region of telangiectatic polyp of the vocal fold, IHb was 88 and BF was 4.1. IHb was 17 and BF was 2.0 in the region of gelatinous polyp. Both IHb and BF had higher value in the telangiectatic polyp than in the gelatinous polyp. It was considered reasonable for vocal fold vibration that blood flow was high and blood volume was low.
