Numbness and tingling in the hand — especially in the thumb, index, and middle fingers — is one of the most common reasons patients are referred for a nerve conduction study. Often, the cause is carpal tunnel syndrome: compression of the median nerve as it passes through a narrow tunnel of ligament and bone at the wrist.
Common symptoms
- Numbness or tingling in the thumb, index, and middle fingers
- Symptoms that are often worse at night or after repetitive wrist movements
- Weak grip strength or a tendency to drop objects
- In longer-standing cases, visible thinning of the muscle at the base of the thumb
When rest isn't enough
Mild cases sometimes improve with wrist splinting, activity changes, and time. But when numbness is persistent, progressively worsening, or grip strength is declining, waiting it out risks permanent nerve damage. This is where diagnostic testing — nerve conduction studies and EMG — helps confirm the severity and guide next steps.
Ultrasound-guided hydrodissection
Hydrodissection is a minimally invasive, ultrasound-guided procedure that uses fluid injection to gently separate the median nerve from surrounding tissue that may be compressing it. It's performed directly in clinic, guided in real time by ultrasound imaging to ensure precise placement around the nerve.
Frequently Asked Questions
Diagnosis typically combines a clinical exam with nerve conduction studies (NCS) and EMG, which measure how well electrical signals travel along the median nerve and assess muscle response.
It's performed under ultrasound guidance with local anesthetic, and most patients tolerate it well as an outpatient procedure with minimal downtime.
For many patients, it can reduce symptoms and delay or avoid the need for surgical release, though the right approach depends on the severity and duration of nerve compression, which is assessed individually.
It's possible, especially if repetitive strain or an underlying condition contributing to it isn't addressed. Follow-up and activity modification are usually part of long-term management.
Concerned about your symptoms?
Dr. Rahul Gunde practices at KIMS Hospitals, Kompally (mornings) and Lifespan Hospital, Jeedimetla (evenings).