Preoperative Electrodiagnostic Study Findings Differ Between Patients With Double-crush Syndrome and Carpal Tunnel Syndrome: A Propensity Matched Analysis.

Autor:	Pohl NB; From the Department of Orthopedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA (Pohl, Narayanan, Brush, Lee, Kanhere, Micou, Fras, Kaye, Mangan, Kurd, Canseco, Hilibrand, Vaccaro, Kepler, Schroeder), Department of Orthopedic Surgery and Sports Medicine, Temple University Hospital, Philadelphia, PA (Dr. Qureshi), and the Department of Physical Medicine & Rehabilitation, Rothman Institute, Thomas Jefferson University, Philadelphia, PA (Mehnert)., Narayanan R, Brush PL, Lee Y, Qureshi R, Kanhere A, Micou ML, Fras SI, Kaye ID, Mangan JJ, Kurd MF, Mehnert MJ, Canseco JA, Hilibrand AS, Vaccaro AR, Kepler CK, Schroeder GD
Jazyk:	angličtina
Zdroj:	The Journal of the American Academy of Orthopaedic Surgeons [J Am Acad Orthop Surg] 2024 Sep 15; Vol. 32 (18), pp. 856-861. Date of Electronic Publication: 2024 May 08.
DOI:	10.5435/JAAOS-D-24-00056
Abstrakt:	Introduction: Double-crush syndrome (DCS) represents a condition that involves peripheral nerve compression in combination with spinal nerve root impingement. The purpose of this study was to compare electrodiagnostic study (EDS) results in patients undergoing carpal tunnel release (CTR) for carpal tunnel syndrome with those undergoing both CTR and anterior cervical diskectomy and fusion for DCS. Methods: Patients receiving an isolated CTR were compared with those undergoing CTR and anterior cervical diskectomy and fusion within two years of CTR. The latter group was defined as our DCS cohort. Electrodiagnostic study results were collected which included sensory and motor nerve conduction data as well as electromyogram (EMG) findings. All electrodiagnostic studies were done before CTR in both sets of patients. Results: Fifty-four patients with DCS and 137 CTR-only patients were included. Patients with DCS were found to have decreased sensory onset latency (3.51 vs 4.01; P = 0.015) and peak latency (4.25 vs 5.17; P = 0.004) compared with the CTR-only patients. Patients with DCS had slower wrist motor velocity (30.5 vs 47.7; P = 0.012), decreased elbow motor latency (9.62 vs 10.6; P = 0.015), and faster elbow motor velocity (56.0 vs 49.4; P = 0.031). EMG results showed that patients with DCS were more likely to have positive findings in the biceps (31.9% vs 1.96%; P < 0.001) and triceps (24.4% vs 2.97%; P < 0.001), but not abductor pollicis brevis (APB) (45.7% vs 37.9%; P = 0.459). Conclusion: We identified changes on EDS between patients with and without DCS. In patients with DCS, sensory nerve studies showed shorter peak and onset latency than in CTR-only patients. Interestingly, DCS and CTR-only patients had different patterns of wrist and elbow motor nerve conduction. Providers observing positive EMG findings proximal to the APB should raise their suspicion for possible cervical radiculopathy and when present with carpal tunnel syndrome-like symptoms, should also consider DCS in their diagnostic differential. (Copyright © 2024 by the American Academy of Orthopaedic Surgeons.)
Databáze:	MEDLINE
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