Transcutaneous electrical nerve stimulation for knee osteoarthritis

Area of Science:

• Physiotherapy
• Rheumatology
• Pain Management

Background:

• Osteoarthritis (OA) is a degenerative joint disease causing cartilage destruction.
• Current OA treatments aim to alleviate pain and improve function, lacking a cure.
• Transcutaneous electrical nerve stimulation (TENS) is a noninvasive physiotherapy modality for pain control.

Purpose of the Study:

• To evaluate the efficacy of TENS for knee OA treatment.
• To assess primary outcomes including pain relief, functional status, and joint imaging.
• To identify the most effective TENS application mode for pain management.

Main Methods:

• Systematic review of randomized controlled trials (RCTs) up to December 1999.
• Searched multiple databases including MEDLINE, EMBASE, and Cochrane.
• Data extraction and quality assessment by independent reviewers; meta-analysis using fixed or random effects models.

Main Results:

• Seven trials involving 294 patients were included; six used TENS, one used acupuncture-like TENS (AL-TENS).
• Both TENS and AL-TENS demonstrated significant pain relief and improved knee stiffness compared to placebo.
• Specific TENS modes (High Rate, Strong Burst Mode) showed significant benefits for knee OA pain.

Conclusions:

• TENS and AL-TENS are effective for pain control in knee OA over placebo.
• Study heterogeneity was noted, potentially due to design and outcome variations.
• Well-designed studies with standardized protocols are required for definitive conclusions on TENS effectiveness in OA.