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Provocative testing for cubital tunnel syndrome
C B Novak1, G W Lee, S E Mackinnon
1Division of Plastic and Reconstructive Surgery, Washington University School of Medicine, St. Louis, MO.
The Journal of Hand Surgery
|September 1, 1994
Summary
The combined elbow flexion and pressure provocation test is the most effective diagnostic tool for cubital tunnel syndrome. This method offers higher sensitivity than individual tests like Tinel's sign for diagnosing this nerve condition.
Area of Science:
- Orthopedics
- Neurology
- Clinical Diagnostics
Background:
- Cubital tunnel syndrome is a common entrapment neuropathy affecting the ulnar nerve at the elbow.
- Accurate diagnosis is crucial for effective treatment and management.
- Provocative tests are frequently used to aid in diagnosis, but their relative efficacy varies.
Purpose of the Study:
- To evaluate the clinical usefulness and diagnostic sensitivity of four provocative tests for cubital tunnel syndrome.
- To compare the effectiveness of individual tests versus combined maneuvers.
Main Methods:
- A prospective study involving 32 patients with confirmed cubital tunnel syndrome and 33 healthy controls.
- Four provocative tests were assessed: Tinel's sign, elbow flexion, pressure provocation, and combined elbow flexion and pressure provocation.
- Sensitivity was calculated for each test.
Main Results:
- The combined elbow flexion and pressure provocation test demonstrated the highest sensitivity (0.91) in diagnosing cubital tunnel syndrome.
- Tinel's sign had a sensitivity of 0.70, pressure provocation 0.55, and elbow flexion alone 0.32.
- Provocative tests were infrequently positive in the control group.
Conclusions:
- The combination of elbow flexion and direct pressure provocation is the most sensitive provocative test for diagnosing cubital tunnel syndrome.
- This combined approach significantly improves diagnostic accuracy compared to individual provocative maneuvers.