Health Dictionary
Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.
Carpal tunnel syndrome other diagnostic studies
Introduction
Overview
Primary prevention of CTS emphasizes ergonomic adaptations, healthy lifestyle practices, and management of systemic diseases. Early education and risk mitigation in high-exposure groups (e.g., office workers, manual laborers) are key to reducing incidence.
| Carpal tunnel diagnosis | ||||
|---|---|---|---|---|
| Clinical | Numbness/tingling in radial 3½ digits | Nocturnal paresthesias | Hand clumsiness/weakness | Thenar atrophy (advanced) First-line diagnosis based on history and physical exam |
| Provocative Tests | Phalen’s test: Wrist flexion reproduces symptoms | Tinel’s sign: Percussion elicits tingling | Durkan’s test: Direct compression; most sensitive Bedside screening maneuvers | |
| Electrodiagnostic (Gold Standard) | Prolonged distal motor latency | Slowed sensory conduction across tunnel | Reduced amplitude in severe cases | EMG: Denervation in thenar muscles Confirms diagnosis, quantifies severity |
| Imaging | Ultrasound: Median nerve CSA >9–10 mm², flattening, hypoechogenicity | MRI: Nerve swelling, T2 hyperintensity, flexor retinaculum bowing, secondary causes | X-ray/CT: Detects fractures, arthritis, deformities (not diagnostic) Adjunct in atypical, recurrent, or secondary CTS |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Dheeraj Makkar, M.D.[2]