Effects of locally applied water-filtered infrared a irradiation adjunctive to iloprost and carbon dioxide hand baths in patients with systemic sclerosis and severe Raynaud’s phenomenon – a randomized controlled trial

BACKGROUND: hand baths remains unclear. METHODS: hand baths. The intervention group (IG) received additional water-filtered infrared-A (wIRA; 2 × 30 min/day, 8 days), while the control group (CG) received baseline therapy alone. The primary endpoint was the difference in RP-associated pain (VAS 0-100 mm) after treatment. Secondary outcomes included changes in RP duration, frequency, and intensity, Health Assessment Questionnaire (HAQ), serum interleukin-6 (IL-6) and vascular endothelial growth factor (VEGF). RESULTS: > 0.05). No adverse events occurred. CONCLUSIONS: Adjunctive wIRA during iloprost therapy was safe and yielded modest, short-term improvements in pain and RP duration. These exploratory effects warrant confirmation in larger controlled trials.