Diabetic neuropathy: Tests and diagnosis - MayoClinic.com

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Diabetic neuropathy: Tests and diagnosis - MayoClinic.com
Jan. 16, 2008
By Mayo Clinic Staff
MayoClinic.com

Tests and diagnosis

Diabetic neuropathy is usually diagnosed based on your symptoms, your medical history and a physical exam. During the exam, your doctor is likely to check your muscle strength and tone, tendon reflexes, and sensitivity to touch, temperature and vibration.

Filament test
Sensitivity to touch is often tested using a soft nylon monofilament. If you're unable to feel the filament on your feet, it's a sign that you've lost sensation in those nerves.

Other tests
In some cases, other tests may be needed, including:

* Nerve conduction studies. This test measures how quickly the nerves in your arms and legs conduct electrical signals. It's often used to diagnose carpal tunnel syndrome.
* Electromyography (EMG). Often performed along with nerve conduction studies, electromyography measures the electrical discharges produced in your muscles.
* Quantitative sensory testing. This noninvasive test is used to assess how your nerves respond to vibration and changes in temperature.

The American Diabetes Association recommends that all people with diabetes have a comprehensive foot exam — either by a doctor or a foot specialist (podiatrist) — at least once a year. In addition, your feet should be checked for sores, cracked skin, calluses, blisters, and bone and joint abnormalities at every office visit.

If you already have diabetic neuropathy, you'll likely be referred to a podiatrist or other specialist for monitoring and treatment.

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