Arch Hand Microsurg 2019; 24(3): 218-224  
Complications of Modified Chow’s Two-Portal Technique in Endoscopic Carpal Tunnel Release
Hee-June Kim1,2, Hyun-Joo Lee1,2, Poong-Taek Kim3, In-Ho Jeon4, Hee-Soo Kyung1,2, Suk-Joong Lee5, Young-Soo Jung1
1Department of Orthopaedic Surgery, Kyungpook National University Hospital, Daegu, Korea
2Department of Orthopaedic Surgery, School of Medicine, Kyungpook National University, Daegu, Korea
3Daegu Park’s Hospital, Daegu, Korea
4Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
5Department of Orthopaedic Surgery, Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea
Correspondence to: Hyun-Joo Lee
Department of Orthopaedic Surgery, Kyungpook National University Hospital, 130 Dongduk-ro, Jung-gu, Daegu 41944, Korea
TEL: +82-53-200-5628, FAX: +82-53-422-6605, E-mail: hjleeleehj@gmail.com, ORCID: https://orcid.org/0000-0003-2837-3434
Received: January 21, 2019; Revised: July 15, 2019; Accepted: July 15, 2019; Published online: September 1, 2019.
© Korean Society for Surgery of the Hand, Korean Society for Microsurgery, and Korean Society for Surgery of the Peripheral Nerve. All rights reserved.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Purpose: Endoscopic carpal tunnel release has gained popularity as a primary surgical option for carpal tunnel release. The purpose of this study was to evaluate the complication of endoscopic carpal tunnel release using modified Chow’s extrabursal dual-portal technique in a large cohort in a single center.
Methods: Data of 2,248 wrists in 1,438 patients who underwent endoscopic carpal tunnel release by the extrabursal dual-portal technique were collected retrospectively from 2000 to 2016. Clinically, postoperative symptom was assessed, and complications were reported.
Results: At the final follow-up, the complication rate was 2.8% including digital nerve injury and tendon injury. Except for 16 hands, the patients showed recovery from the initial symptoms.
Conclusion: Extrabursal modified Chow’s dual-portal technique is a reliable and safe method to treat carpal tunnel syndrome with minimal complications.
Keywords: Carpal tunnel syndrome, Endoscopic carpal tunnel release, Complications


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