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Contents
  • Physical Examination: The First Step
  • Electrodiagnostic Tests: Getting on Your Nerves
  • Imaging: A Deeper Look
  • Blood Tests: Ruling Out Other Causes

Diagnosing Carpal Tunnel Syndrome: What Tests Should You Expect?

Diagnosing Carpal Tunnel Syndrome: What Tests Should You Expect?

Beyond the Tingle

If you're experiencing hand pain or numbness, your doctor may suspect carpal tunnel syndrome (CTS). But how do they confirm this diagnosis? Several tests can help pinpoint CTS and rule out other conditions.
Contents
  • Physical Examination: The First Step
  • Electrodiagnostic Tests: Getting on Your Nerves
  • Imaging: A Deeper Look
  • Blood Tests: Ruling Out Other Causes

Physical Examination: The First Step

Your doctor will start with a thorough physical exam. They'll check your hand and wrist for tenderness, swelling, and strength. They may perform specific tests like the Tinel's sign (tapping over the median nerve) or Phalen's maneuver (holding the wrists in a flexed position). These tests can provoke CTS symptoms, helping with diagnosis.

Electrodiagnostic Tests: Getting on Your Nerves

The gold standard for CTS diagnosis is electrodiagnostic testing. This includes nerve conduction studies (NCS) and electromyography (EMG). NCS measures how quickly electrical signals travel through the median nerve. In CTS, this signal is often slowed or weakened. EMG examines the electrical activity in hand muscles, which can be affected by CTS.
Carpal Tunnel Syndrome (CTS) is a condition caused by pressure on the median nerve, leading to pain, numbness, and weakness in the hand and wrist. Diagnosis involves physical examinations and electrodiagnostic tests.

Imaging: A Deeper Look

While not always necessary, imaging tests can sometimes help diagnose CTS. Ultrasound can show if the median nerve is swollen within the carpal tunnel. MRI provides detailed images of the wrist anatomy and can reveal other causes of symptoms, like tumors or cysts. X-rays may be used if arthritis or fractures are suspected.

Blood Tests: Ruling Out Other Causes

Your doctor may order blood tests to check for underlying conditions that can cause CTS-like symptoms. These might include tests for diabetes, thyroid disorders, or rheumatoid arthritis. Identifying these conditions can help guide treatment and improve overall health outcomes.

FAQs

Are these tests painful?

Most are painless, though EMG may cause brief discomfort.

How long do the tests take?

Electrodiagnostic tests usually take 30-60 minutes.

Are the tests always accurate?

No test is perfect, but combined with symptoms, they're very reliable.

Will insurance cover these tests?

Most insurance plans cover CTS diagnostic tests when medically necessary.

Can I eat before the tests?

Usually yes, but check with your doctor about specific instructions.

Knowledge is Power

Understanding these tests can help you feel more prepared and empowered in your CTS diagnosis journey.
Curious about which CTS tests might be right for you? Consult with Doctronic to learn more about the diagnostic process.
Additional References
  1. Jablecki CK, et al. Practice parameter: Electrodiagnostic studies in carpal tunnel syndrome. Neurology 2002; 58:1589.
  2. Cartwright MS, et al. Evidence-based guideline: neuromuscular ultrasound for the diagnosis of carpal tunnel syndrome. Muscle Nerve 2012; 46:287.
  3. American Academy of Orthopaedic Surgeons. Carpal Tunnel Syndrome: Diagnosis.
This article has been reviewed for accuracy by one of the licensed medical doctors working for Doctronic.