Median nerve compression at the wrist

Area of Science:

• Orthopedics
• Neurology
• Hand Surgery

Background:

• Carpal tunnel syndrome is a common condition requiring surgical intervention.
• Surgical failure rates range from 7% to 20%, necessitating accurate diagnosis and treatment selection.

Purpose of the Study:

• To outline diagnostic criteria for carpal tunnel syndrome.
• To identify factors predicting nonoperative treatment success.
• To describe optimal surgical decompression techniques.

Main Methods:

• Correlation of patient symptoms with diagnostic studies, including nerve conduction studies and sensibility tests.
• Evaluation of laboratory tests for systemic conditions and imaging studies.
• Identification of clinical predictors for nonoperative treatment response.
• Description of surgical decompression using a preferred incision and technique.

Main Results:

• Delayed sensory conduction time and Semmes-Weinstein monofilaments are reliable diagnostic indicators.
• Predictive factors for nonoperative treatment include age >50, constant paresthesias, duration >10 months, stenosing flexor tenosynovitis, and positive Phalen's test (<30s).
• Fewer than 10% of patients with three or more predictive factors achieve nonoperative cure.

Conclusions:

• Accurate diagnosis through symptom correlation and appropriate testing is crucial.
• Nonoperative treatment is suitable for patients with normal diagnostic findings, but success is limited by specific clinical factors.
• Surgical decompression requires meticulous technique, including exploration and decompression of the motor branch.