Diagnostic tests in Raynaud's phenomena in workers exposed to vibration: a comparative study

Area of Science:

• Occupational Health
• Vascular Medicine
• Diagnostic Testing

Background:

• Raynaud's phenomena (RP) affects workers exposed to hand-arm vibrations.
• Vibration-induced white finger is a common occupational RP.
• Accurate diagnosis is crucial for managing RP.

Purpose of the Study:

• To evaluate the diagnostic value of four objective tests for Raynaud's phenomena.
• To compare the sensitivity and specificity of these tests in exposed workers.

Main Methods:

• Evaluated finger systolic blood pressure (FSP) tests (FSP(0) and FSP(A)) and finger colour tests (FCV and FCS).
• Tests were applied to workers exposed to hand-arm vibrations with and without RP, and healthy controls.
• A medical interview served as the reference method.

Main Results:

• FSP(A) showed high sensitivity (96%) but lower specificity (64%).
• Sensitivity did not significantly differ between FSP(0) (74%), FCS (61%), and FCV (57%).
• Finger colour tests (FCV/FCS) showed potential diagnostic value, comparable to FSP(0).

Conclusions:

• Finger colour tests may be as valuable as the FSP(0) test for diagnosing RP.
• FSP(A) indicates an exaggerated cold response but does not diagnose RP.
• Pressure measurements can guide evaluation of preventive measures and treatments for RP.