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[Nerve compression syndrome in the thoracic outlet]
F Fernández-González1, T Suárez-Fernández
1Servicio de Neurofisiología Clínica, Hospital Central de Asturias, España.
Revista De Neurologia
|May 20, 1998
Summary
Standard electrodiagnostic tests have low sensitivity for Thoracic Outlet Compression Syndrome (TOCS). Provocative maneuvers like Wright's test can improve diagnosis accuracy in TOCS patients with initial negative findings.
Area of Science:
- Neurophysiology
- Diagnostic Imaging
- Neurology
Context:
- Thoracic Outlet Compression Syndrome (TOCS) diagnosis relies on electrodiagnostic studies, which often show low sensitivity.
- Standard nerve conduction studies, F-waves, and evoked potentials may not detect TOCS.
- A negative electrodiagnostic study does not rule out TOCS.
Purpose:
- To evaluate the utility of specific clinical tests as neurophysiological provocative maneuvers for TOCS.
- To determine the impact of brachial plexus positioning on electrodiagnostic parameters during provocative testing.
- To enhance the diagnostic accuracy of TOCS.
Summary:
- Nine patients with suspected TOCS underwent electrodiagnostic evaluations before and after provocative maneuvers (Wright's hyperabduction, costoclavicular compression, Adson's scalenus tests) for 3 and 6 minutes.
- Positive electrodiagnostic findings were observed in 7 out of 9 patients following provocative maneuvers.
- This suggests that provocative tests can unmask TOCS in patients with initially negative electrodiagnostic results.
Impact:
- Recommends reevaluation of patients with presumptive TOCS and negative electrodiagnostic findings immediately after 6 minutes of provocative testing.
- Highlights the potential of using clinical provocative tests as neurophysiological tools for TOCS diagnosis.
- Aims to improve the diagnostic yield of electrodiagnostic studies in TOCS.