설골상부 근육이완술이 기관성형에 미치는 효과 (실험적 연구)

Experimental Study for the Efficacy of Suprahyoid Release Technique in Dogs

In case of segmental injury of trachea, the primary repair is very difficult, because the trachea is fixed in place without movability from the surrounding tissue. In addition to special anatomical situation of trachea, any ideal artificial prosthesis for tracheal replacement is not still appeared. Many authors proposed several procedures for the tracheal repair, but satisfactory results were few. Among the proposed procedures end to end anastomosis of trachea was noted superior when both ends of trachea could be approximated by mobilization of upper and lower injured trachea. The author's experiment was designed to determine the effect about decreased tension on trachea when the hyoid bone was released downward from the surrounding muscular structures. The experimental dogs were divided into two groups, suprahyoid releasing group (SH R) and control group of intact hyoid. SH R group was subdivided into two groups accord ing to he degree of tension. The experimental results were as follow; 1. SH R group: In view of X-ray, the distance between the angle of mandible and the displaced hyoid bone was lengthened downward. And it's range was from 1.3cm (38%) minimally to 2.7cm(108%) maximally. 2. Control group: The distance between the angle of mandible and hyoid was same in both pre and postoperation. As the result of this experiment study, the suprahyoid release technique seems to be the efficient method that enable of release the trachea maximally. And it should be expected that the SH R technique is applicable clinically.