후두의 영상기록
Published Online: May 31, 2020
ABSTRACT
Since the first successful photographic documentation of the larynx by Thomas French in 1882, many different method of laryngeal photography have been developed. But it was not popular until 1980s, because of difficult technique to take a photo, improper light source and expenditure etc. In the 1980s, with the development of telescope, laryngeal photography have been widely accepted as a part of examination of the larynx. The purpose of this study is to compare the currently available methods of still photography of the larynx and to find out which methods are more suitable for laryngeal documentation.
The results obtained were as follows:
Direct and indirect laryngeal photography is simple results but the images obtained from both methods are too small to differentiate the laryngeal pathology.
Fiberscopic laryngeal photography is very useful in case of children and adult with hyperactive gag reflex. But the image obtained is distorted and less clear to demonstrate the early mucosal lesion.
90° Telescopic laryngeal photography can be taken under local anesthesia and provides a large, clear wide-angle view but there is some difficult in exposing and focusing the larynx.
0° Telescopic laryngeal photography provides a large excellent picture of the larynx, especially a close-up view for detecting early mucosal lesion of the vocal cord. But there is some limit for exposing posterior glottis, arytenoid, piriform sinus and epiglottis.
Microscopic laryngeal photography provides variable sized image according to different magnification and relatively clear picture. But it requires bright illumination and there is some limits for posterior glottis, arytenoid, piriform sinus and epiglottis.
In conclusion, to obtained a clear wide angle view of the larynx, 90° Telescopic laryngeal photography is useful and to demonstrate the early mucosal lesion of vocal cord, 0° Telescopic laryngeal photography and microscopic photography is recommendable