Carpal Tunnel Syndrome (Median Nerve Compression)

Carpal tunnel syndrome arises from compression of the median nerve, a condition attributable to a multitude of etiologic factors. Primary contributors include soft tissue swelling—such as synovial membrane inflammation of the flexor tendons or tenosynovitis within the wrist—as well as mechanical trauma, including fractures of the radius, ulna, or carpal bones, which may narrow the carpal tunnel space. Commonly cited predisposing causes also encompass repetitive microtrauma (e.g., prolonged computer use), chronic joint inflammation (e.g., rheumatoid arthritis), and metabolic disorders such as diabetes mellitus or hypothyroidism. These factors can induce fibrosis, edema, or structural alterations, culminating in median nerve compression and resultant neurological symptoms.

Carpal tunnel syndrome presents with a constellation of clinical features, which may include: • persistent pain of varying severity, • numbness or altered sensation, • paresthesia (often described as "pins and needles"), • involuntary dropping of held objects due to impaired grip strength. Sensory disturbances most commonly affect the thumb, index finger, middle finger, and—to a lesser extent—the ring finger. Symptoms typically exacerbate during nocturnal hours but may also manifest during routine activities such as driving, gripping a bicycle handlebar, or prolonged reading of printed materials. In advanced cases, permanent sensory deficits and significant muscular weakness of the hand may develop. A thorough medical history is indispensable for accurate diagnosis and should encompass: • the onset and progression of initial symptoms, • the nature of manual occupational or recreational activities (particularly those involving repetitive wrist motions), • any prior trauma or overuse injuries to the upper extremity. To exclude alternative pathologies and confirm the diagnosis, the following evaluations are advised: • imaging studies (e.g., X-rays to assess bony anatomy), • laboratory tests (if systemic conditions are suspected), • electrodiagnostic nerve conduction studies, which provide objective assessment of median nerve function within the carpal tunnel.

In numerous instances, symptoms associated with peripheral nerve compression can be effectively mitigated without resorting to surgical intervention. Available non-invasive therapeutic modalities include: **ergonomic modification of manual task performance conditions** (which contributes to reducing mechanical stress on the nerve), for instance during prolonged computer use; **maintaining a physiologically neutral wrist alignment** (which minimizes tension exerted on neural fibers); **application of a stabilizing wrist splint during nocturnal hours** (which facilitates alleviation of sleep-disrupting symptoms such as paresthesia or pain); **localized corticosteroid injections into the carpal tunnel space** (which leads to a reduction in perineural tissue edema). Should conservative management prove ineffective or if symptoms demonstrate progression, surgical treatment may become necessary. **Division of the transverse carpal ligament**—the structure forming the roof of the carpal tunnel—enables nerve decompression. Postoperatively, incisional pain may persist for several weeks to months. Sensory disturbances, including numbness or tingling, may resolve immediately or gradually diminish during the recovery period. Full restoration of functional capacity in the affected limb may require up to several months. In advanced cases of carpal tunnel syndrome, there remains a possibility that certain symptoms may persist despite surgical intervention.