Computerized cuff pressure algometry: A new method to assess deep-tissue hypersensitivity in fibromyalgia.

Area of Science:

• Pain Medicine
• Neurology
• Rheumatology

Background:

• Fibromyalgia (FM) is a chronic pain disorder characterized by widespread musculoskeletal pain.
• Deep-tissue sensitivity and its relationship with disease markers in FM require further investigation.

Purpose of the Study:

• To evaluate the utility of computerized cuff pressure algometry (CPA) for assessing deep-tissue sensitivity in fibromyalgia.
• To correlate CPA-derived sensitivity measures with other established FM disease markers.

Main Methods:

• Forty-eight women with FM and 16 healthy controls underwent CPA using a pneumatic tourniquet cuff on the gastrocnemius muscle.
• Participants rated pain intensity on a visual analogue scale (VAS) during cuff inflation to determine pressure-pain threshold, tolerance, and limit.
• FM disease markers included isokinetic knee muscle strength, tender point count, myalgic score, Beck Depression Inventory, and Fibromyalgia Impact Questionnaire.

Main Results:

• Patients with FM exhibited significantly lower pressure-pain threshold and pressure-pain tolerance compared to healthy controls, suggesting muscle hyperalgesia.
• No significant difference was found in the pressure-pain limit between groups.
• CPA parameters correlated significantly with isokinetic knee muscle strength, with greater hypersensitivity associated with lower strength.

Conclusions:

• Computerized cuff pressure algometry effectively identifies reduced deep-tissue sensitivity and muscle hyperalgesia in fibromyalgia patients.
• CPA-assessed hypersensitivity is linked to impaired muscle strength in FM but shows no significant association with psychological distress or mood indicators.