Saline Injection Gives Longer Relief for Carpal Tunnel Pain

Carpal tunnel syndrome makes everyday tasks feel impossible when the median nerve is pinched inside the wrist. Pain, tingling, numbness, and weakness can make writing, typing, or even holding a pen exhausting. Doctors usually recommend medication, wrist splints, or in severe cases, surgery. A recent pilot trial tested whether a simple saline injection could keep symptoms down longer than the standard steroid shot.

Carpal tunnel syndrome makes everyday tasks impossible

The procedure, called hydrodissection, uses ultrasound to guide a fine needle beside the nerve. A sterile salt solution is then injected, creating a fluid space that pulls the nerve away from surrounding tissues. By freeing the nerve, the saline may reduce pressure and allow smoother movement. Steroids, on the other hand, work by dampening inflammation and swelling, but do not separate the tissues.

The study enrolled 39 adults with persistent symptoms, treating 63 wrists with three methods: saline alone, steroid alone, or saline plus steroid. All treatments were guided by ultrasound, and patients were followed for six months. Results showed that relief from the saline-only group lasted through the entire follow‑up, while pain returned in most patients who received only steroids. Adding steroids to saline did not extend the benefit, and ultrasound scans confirmed less nerve swelling in the hydrodissection groups.

The procedure took about fifteen minutes, required no hospital stay, and caused only mild, short‑term discomfort in a few patients. No serious complications were reported. Limitations include the small sample size, the lack of a placebo arm, and the fact that only mild‑to‑moderate cases were studied; severe cases still need surgery. A larger, longer trial comparing different fluids is underway.