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½Å¸í½Ä/Myung Sik Shin À̵¿ÇÑ/À̽ÂÁÖ/Á¶¼ö¿¬/Á¶¿ëÇö/À±¹®¼ö/±è¿µ½Ç/Dong Han Lee/Seung Ju Lee/Su Yeon Cho/Yong Hyun Cho/Moon Soo Yoon/Young Sill Kim

Abstract

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#ÃÊ·Ï#
Purpose: Conventional suture anastomosis using fine non-absorbable suture material is
the most commonly used vasovasostomy procedure. But it needs experienced
microsurgical skills and prolonged operative time and sometimes it causes local injury to
the vats to prevent healing of anastomosis. Recent advances of tissue-welding laser
technology in vasovasostomy have resulted in reduced requirement of microsurgical
skills, less trauma of anastomotic site and less operative time. Its pitfalls are, however,
the difficulty in transfering equal laser energy to anastomotic site and weakness in
tensile strength of anastomosis. We conducted this study to determine whether a tissue
adhesive which is widely used in clinical field recently could solve the problems of the
conventional suture anastomosis and laser technology as mentioned above.
Materials and Methods: 42 male Sprague-Dawley rats initially underwent midline
scrotal exploration and transection of their vas deferens bilaterally followed by
immediate microsurgical vasovasostomy by one of the three experimental methods. All
groups initially had the vats ends coacted by two full layered sutured sutures of 10-0
nylon under an operating microscope. The conventionally sutured group had an
additional four to six 10-0 nylon sutures. The Nd:YAG laser-assisted group underwent
laser welding with denaturation of the serosa to seal the anastomosis. A fibrin glue was
placed topically over the coacted vas ends in tissue adhesive group.
Results: 1. There were statistically significant differences in operative time among the
conventionally sutured(31.5 minutes) group, the laser-assisted(19.4 minutes) group and
the tissue adhesive group(14.4 minutes)(p<0.05). 2. The patency rates of the
anastomosed vats were 75.0%, 84.6%, and 89.3% respectively in the conventionally
sutured group, the laser-assisted group and the tissue adhesive group. Although the
patency rate was highest in the tissue adhesive group, it was not statistically
significant(p>0.05). 3. The patency degree of the vas, measured by the flow rate of
saline, was 1.40§¢/min, 1.76§¢/min, and 2.17§¢/min respectively in the conventionally
sutured group, the laser-assisted group and the tissue adhesive group and there was
statistically significant difference between the conventionally sutured group and the
tissue adhesive group(p<0.05). 4. The tensile strength of the anastomosed vas was
112.9g, 100.2g, and 124.8g respectly in the conventionally sutured group, the
laser-assisted group and the tissue adhesive group and there was statistically significant
difference between the laser-assisted group and the tissue adhesive group(p<0.05). 5.
Histological findings showed relatively thick fibrotic scar on the anastomotic plain of the
conventional suture group and limited scar formation on that of the laser-assisted group
and the tissue adhesive group.
Contusions: These results demonstrate that vasovasostomy using fibrin glue tissue
adhesive does not need expert microsurgical skill, requires less operative time and would
give more favorable postoperative results than conventionally sutured or laser-assisted
vasovasostomy.

Å°¿öµå

Vasovasostomy; Tissue adhesive; Laser;

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