CC BY-NC-ND 4.0 · J Hand Microsurg 2021; 13(02): 069-074
DOI: 10.1055/s-0040-1701318
Original Article

Causes of Procedural Failures of Closed Reductions using an Extension-Block Pin for Bony Mallet Finger

Taku Suzuki
1  Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
,
Takuji Iwamoto
1  Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
,
Noboru Matsumura
1  Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
,
Hiroo Kimura
1  Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
,
Masaya Nakamura
1  Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
,
Morio Matsumoto
1  Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
,
Kazuki Sato
2  Institute for Integrated Sports Medicine, Keio University School of Medicine, Tokyo, Japan
› Author Affiliations

Abstract

This retrospective study evaluated procedural failures of closed reductions using an extension-block Kirschner wire (K-wire) for bony mallet finger. A total of 132 patients who underwent a closed reduction for bony mallet finger in a procedure using an extension-block K-wire were radiographically assessed. Radiographs were used to evaluate (1) postoperative displacement of the reduction before or after K-wire removal and (2) inaccurate reduction of the fragment immediately after surgery. The causes of procedural failure and bone union were evaluated using radiographs and medical records of the intraoperative findings. Out of 132 patients, 17 with procedural failure were enrolled. Displacement of the reduction before and after K-wire removal occurred in seven and six cases, respectively. Inaccurate reduction immediately after surgery occurred in four cases. The most common cause of procedural failure was inaccurate insertion of the K-wire to fix the distal interphalangeal joint (eight cases) followed by inaccurate insertion of the extension-block pin (five cases). All patients had bone union regardless of the displacement of the reduction or inaccurate reduction of the fragment. Caution should be exercised during the reduction and fixation when an extension-block K-wire is used in a closed reduction procedure.



Publication History

Publication Date:
07 April 2020 (online)

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