Modified coaxial portals for posterior ankle arthroscopy: an anatomic study
- VernacularTitle:改进的踝关节镜后方共轴入路的解剖学研究
- Author:
Feng GAO
;
Jianchao GUI
- Publication Type:Journal Article
- Keywords:
Ankle joint;
Arthroscopes;
Anatomy
- From:
Chinese Journal of Orthopaedics
2000;0(02):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective The purpose of this study is to evaluate the safety and operation of a modified coaxial portals for posterior ankle arthroscopy. Methods 20 anticeptic-frozen ankle specimens were divided into 2 teams at random equally. In the first team, the original coaxial portals designed by Acevedo were established with K-wires first, then followed by modified coaxial portals. In the second team, modified coaxial portals were created at two levels, one at 1.5 cm proximal to the tip of lateral malleolus and the other at 2.5 cm to the tip. K-wires were left in place for distance measurement between them and the posterior important anatomic structures. Mimic ankle arthroscopy operation was performed on 5 fresh ankle amputations, using 2.7 mm, 30? arthroscopy with the modified coaxial portals technique. Results Results of the anatomic study show that the average distince was (22.07+2.82) mm to the small saphenous vein, (5.39+1.47) mm to flexor hallucis longus tendon, (6.27+1.84) mm to the tibial nerve in modified coaxial portals and (8.54+2.76) mm to the small saphenous, (3.62+1.37) mm to flexor hallucis longus, (4.40+1.40) mm to the tibial nerve in the original one. Only the difference of the average distance to the tibial nerve in the No.2 team has statistic significance. Flexor hallucis longus and flexor digitorum tendon were identified as the inner-safety landmarks. Neither penetration nor contact of nerve or vessel was observed. Conclusion Compared with original ankle posterior coaxial portals, the modified coaxial portals may be superior safety, easier-operated and reproducible.
