Utility of the ultrasound examination of the hand and wrist joints in the management of established rheumatoid arthritis.

OBJECTIVE: To investigate the usefulness of point-of-care hand and wrist joint ultrasound (US) examination in patients with established rheumatoid arthritis (RA).
METHODS: Fifty-one RA patients were evaluated using clinical disease activity measures and gray-scale and power Doppler (PD) US. Agreement between US and clinical findings and its impact on physicians' confidence and clinical decision were assessed.
RESULTS: Agreement between intraarticular PD signal and joint swelling (JS) was moderate (82%; κ = 0.44). Agreement between PD signal and joint tenderness to palpation (TTP) was fair (75%; κ = 0.24). The greatest agreement between PD signal and clinical findings was seen in the 5th metacarpophalangeal (MCP) joint (96% JS, 88% TTP) and the poorest agreement was seen in the wrist (69% JS, 65% TTP) and 2nd (75% JS, 72% TTP) and 3rd (82% JS, 72% TTP) MCP joints. The presence of PD signal in nonswollen and/or nontender joints accounted for most of the disagreement in the wrists, while the opposite was true for the 2nd/3rd MCP joints. Agreement between sonographic synovial thickening and clinical findings was poor. Total sonographic synovial hypertrophy or PD score correlated significantly with physician-recorded, but not patient-recorded, clinical outcomes. US increased both physicians' confidence in their clinical decision (P < 0.0005, irrespective of Clinical Disease Activity Index score) and patients' confidence in physicians' medical decisions (88.4% of the cases). US modified biologic agent and/or disease-modifying antirheumatic drug (DMARD) use in 7 individual cases, but it did not affect the overall treatment plan (P > 0.15) or DMARD (P < 0.062) or biologic agent (P > 1.0) use in this group of RA patients.
CONCLUSION: PD examination of the wrist and 2nd/3rd MCP joints might be feasible and clinically meaningful in evaluation of disease activity in patients with established RA. US examination of the hand/wrist joints in RA increases physicians' confidence in their clinical decision and can help to individualize DMARD and biologic agent use.