Carpal tunnel syndrome results in numbness, tingling and weakness due to pressure on the median nerve. Located in the wrist, the median nerve travels through a narrow passageway known as the carpal tunnel. Should the passageway be narrowed, pressure is placed on the nerve and the symptoms of carpal tunnel syndrome occur. An ultrasound may be used in order to confirm a diagnosis of carpal tunnel syndrome.
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Carpal tunnel syndrome ultrasound is a non-invasive imaging test that uses sound waves to examine the median nerve and surrounding structures at the wrist. If you have feelings of numbness, tingling, or weakness in your wrist and hand, then you may benefit from this diagnostic tool.
At Cayman Neurology, we offer a comprehensive approach to diagnosing conditions that affect the nerves. Schedule your appointment in the Cayman Islands today.
Ultrasound is an imaging test that uses high-frequency sound waves to create real-time images of the soft tissues inside the body. When diagnosing carpal tunnel syndrome, the clinician is able to visualize the median nerve and surrounding carpal tunnel structures.
The clinician will look at changes in the cross-sectional area of the median nerve, such as swelling, flattening, and reduced mobility. They will also look for the causes of these changes, such as swollen tendons or cysts that could be putting pressure on the nerve.
There is very little you need to do to prepare for an ultrasound diagnosis. You do not need to fast or change any medication. Come to the appointment with clothing that allows easy access to the hand and wrist, and do not put any lotions on your wrist before the appointment.
At the appointment, you may be asked about any previous wrist injuries, surgeries, or other conditions that have affected the wrist.
An ultrasound is an outpatient procedure that is usually done in the office. During the ultrasound test for carpal tunnel syndrome, your doctor will usually follow these steps:
Many patients wonder why imaging tests are ordered as well as nerve conduction studies and electromyography. While nerve conduction studies and electromyography can show how the median nerve functions, an ultrasound will highlight the structural changes that may be causing the nerve’s functional impairment.
An ultrasound can clearly show if there is any swelling in the median nerve. A measurement of 10–12 mm² or greater is generally considered abnormal and may indicate carpal tunnel syndrome. Ultrasound can also identify structural causes of nerve compression. It can identify things like swollen tendons or cysts.
Following the ultrasound, your clinician will determine whether you have carpal tunnel syndrome. The results may also reveal other conditions that are leading to the symptoms you are experiencing.
You may also be required to carry out nerve conduction studies or electromyography to further confirm your diagnosis.
Once the results have been understood, a personalized treatment plan will be made to relieve the symptoms you have been experiencing. Options may include wrist splinting, activity modification, medication, corticosteroid injection, or surgery for selected severe or persistent cases.
If the ultrasound identifies significant compression, discussing treatment earlier may help reduce the risk of ongoing nerve injury and permanent nerve damage.
If you have been experiencing tingling, numbness, or weakness in your hand, then schedule an appointment with one of our neurological specialists. At Cayman Neurology, we provide a range of diagnostic tests to identify your symptoms and provide personalized treatments. Schedule your appointment today!
An ultrasound can show the size, shape, and movement of the median nerve, as well as changes in surrounding tendons and other structures.
The ultrasound procedure is generally painless. It involves moving a handheld transducer over the wrist with the help of ultrasound gel.
An Ultrasound can provide valuable information about the internal structures in the wrist. However, further diagnostic tools such as nerve conduction studies and electromyography may also be recommended sometimes.