Biomechanical testing of a modified knotless transscleral suture fixation technique: an ex vivo study

• Published in: Annals of translational medicine 2023-03, Vol.11 (6), p.244-244
• Main Authors: Xu, Pusheng, Li, Xuepei, Ke, Zongwen, Young, Charlotte, Lian, Zhangkai, Jin, Guangming, Zheng, Danying
• Format: Article
• Language: English
• Subjects: Original
• ISSN: 2305-5839; 2305-5839
• DOI: 10.21037/atm-22-3184

To investigate the safety and effectiveness of a modified transscleral suture through tests. tests were performed in full-thickness porcine scleral pieces using modified knotless transscleral zigzag-shaped suture (Z-suture) fixation technology. The minimum traction force required to loosen or rupture the suture was assessed. The effects of different polypropylene sutures (10-0, 8-0), different suture spans (2.0, 3.0, 4.0 mm), different passes (3, 4, 5 passes), and scleral grooves were investigated. The average minimum traction forces required to loosen 10-0 polypropylene sutured for 3.0 mm with a suture span of 3, 4, and 5 passes, were 0.18 (0.15-0.18), 0.22 (0.21-0.22), and 0.37 (0.37-0.37) N, respectively. The maximum traction force to prevent the suture from rupturing for the 10-0 polypropylene suture was 0.37-0.41 N in the sclera. The average of the minimum traction forces required to loosen the 8-0 polypropylene sutured with 5 passes and spanning 2.0, 3.0, and 4.0 mm were 0.37 (0.3 -0.39), 0.42 (0.42-0.45), and 0.50 (0.50-0.51) N, respectively, which were 14-28% higher than that of the 10-0 polypropylene suture under same conditions (all P values