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Myung-Sun Kim1, Dong Whan Kim2, Young Eun Choi2, Larry Bachman Jr3, Sae Hoon Kim2
1 Department of Orthopedic Surgery, Chonnam National University College of Medicine, Chonnam National University Hospital, Gwangju, Korea
2 Department of Orthopedic Surgery, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Korea
3 Department of Bioengineering, University of California, San Diego, USA
Correspondence Address:
Sae Hoon Kim
Department of Orthopaedic Surgery, Seoul National University College of Medicine, Seoul
Korea
 Source of Support: This work was funded by donation grant-aid-program in the institution: SNUH no. 3020130210 (2013-2705), Conflict of Interest: None
DOI: 10.4103/0973-6042.154760
Purpose: To determine the effect of tendon thickness on the needle penetration ability of four different designs of antegrade suture passers.
Materials and Methods: Four antegrade suture passers were tested: (a) ExpresSew II (Depuy Mitek Inc., Raynham, MA), (b) Arthrex Scorpion (Arthrex, Naples, FL), (c) Concept (Linvatec Corp, Largo, FL), and (d) ElitePass (Smith and Nephew Endoscopy, Andover, MA). Bovine tendons were divided into five thickness groups: 3, 5, 7, 9 and 11 mm. At each tendon thickness, we performed 15 trials with the suture loaded and 15 unloaded per device. Successful needle penetration was recorded, and in case of success, the exit point of the needle was noted in relation to the superior arm of the grasping component.
Results: All tested suture passing devices successfully penetrated tendon thicknesses of 3 and 5 mm. With the suture loaded, one device (Concept) only successfully penetrated 7 mm group tendons in 3/15 (20%) trials. Success rates at 9 mm with the suture loaded were 40% in ExpresSew II, 53% in Arthrex Scorpion, 0% in Concept and 53% in ElitePass. Among successful passages with a loaded suture in the 7 and 9 mm-groups, about 20-50% of passages were oblique, and the needle came out distal to the superior arm of grasping the component. No trial with any device succeeded with 11 mm tendons in the suture loading condition.
Conclusion: Using an antegrade suture passer during arthroscopic rotator cuff repair should be carefully considered when the torn end of the tendon is thicker than about 7-9 mm due to potential failure of needle penetration and/or too oblique a suture passage.
Level of Evidence: Controlled laboratory study.
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