Carpal Tunnel Syndrome: Tests
When any of the nine long passing through the swell or degenerate, the narrowing of the canal often results in the becoming entrapped or compressed.
About Carpal Tunnel Syndrome Tests
Early diagnosis and are important to avoid permanent damage to the . A physical examination of the , , , and can help determine if the patient’s complaints are related to daily activities or to an underlying disorder, and can rule out other painful conditions that mimic .
The is examined for tenderness, swelling, warmth, and discoloration. Each finger should be tested for sensation, and the at the base of the should be examined for strength and signs of . Routine laboratory tests and X-rays can reveal , , and fractures.
Physicians can use specific tests to try to produce the symptoms of . In the Tinel test, the doctor taps on or presses on the in the patient’s . The test is positive when tingling in the or a resultant shock-like sensation occurs.
The Phalen, or -, test involves having the patient hold his or her upright by pointing the down and pressing the backs of the together. The presence of is suggested if one or more symptoms, such as tingling or increasing numbness, is felt in the fingers within 1 minute. Doctors may also ask patients to try to make a movement that brings on symptoms.
Often it is necessary to confirm the diagnosis by use of electrodiagnostic tests. In a conduction study, electrodes are placed on the and . Small electric shocks are applied and the speed with which transmit impulses is measured. In electromyography, a fine needle is inserted into a ; electrical activity viewed on a screen can determine the severity of damage to the .
Ultrasound imaging can show impaired movement of the . Magnetic resonance imaging (MRI) can show the of the but to date has not been especially useful in diagnosing .