Sensitive median-ulnar motor comparative techniques in carpal tunnel syndrome
| Autor: | Christine Quinto, Sudhansu Chokroverty, Peter B. Saadeh, Howard W. Sander |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
medicine.medical_specialty
medicine.diagnostic_test Physiology business.industry Median Neuropathy Electromyography Wrist musculoskeletal system medicine.disease Median nerve Nerve conduction velocity Surgery body regions Cellular and Molecular Neuroscience medicine.anatomical_structure Physiology (medical) medicine Neurology (clinical) Radiology Latency (engineering) Carpal tunnel syndrome business Polyneuropathy |
| Zdroj: | Muscle & Nerve. 22:88-98 |
| ISSN: | 1097-4598 0148-639X |
| Popis: | We describe two modified methods for median-to-ulnar motor conduction comparison in the diagnosis of median neuropathy at the wrist: the median-thenar to ulnar-thenar latency difference (TTLD), and the median-thenar to ulnar-hypothenar latency difference (THLD). We also describe an F-wave ulnar-to-median comparative test, the F-wave latency difference (FWLD). The abnormal cutoffs based upon 34 normal controls are: TTLD, 0.8 ms; THLD, 1.2 ms; FWLD, 0.6 ms. In 50 patients (79 hands) with clinically defined carpal tunnel syndrome and electrophysiological evidence of median neuropathy at the wrist (based upon a prolonged median nerve palm-wrist latency), the diagnostic sensitivities were: 95-98%, 85-88%, and 75-78%, respectively. These tests are therefore highly sensitive. They are easily performed and require minimal additional effort to incorporate into commonly used clinical electrodiagnostic routines. They may be advantageous when a concomitant polyneuropathy is present, and they may also help avoid technical pitfalls and aid in identification of anatomic variants. |
| Databáze: | OpenAIRE |
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