Comparison of intra-articular injection of platelet-rich plasma with combination of bupivacaine and corticosteroid in osteoarthritis knee.

Background and aims: The use of intra-articular injection has been widely accepted as a therapy for pain due to osteoarthritis of the knee. We aimed to compare the efficacy of intra-articular injection of platelet-rich plasma (PRP) with a combination of bupivacaine and corticosteroid in osteoarthritis of the knee.

Material and methods: Fifty patients (aged more than 50 years) with pain pattern consistent with osteoarthritis of the knee who did not respond to conservative treatment were included in the study. They were randomly divided into two groups of 25 each: group I (n = 25) patients were administered fluoroscope-guided intra-articular knee injection of bupivacaine and steroid, and group II (n = 25) patients were administered intra-articular knee injection of PRP. In group I, patients were administered 9 ml of drug solution comprising 8 ml of 0.5% bupivacaine and 1 ml of triamcinolone (40 mg). In group II, patients were administered 6 ml of PRP. Pain, patient satisfaction, and the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) were assessed at different time intervals before and after the procedure for up to 12 months.

Results: Pain score and WOMAC were both clinically and statistically better at 2 weeks and 1 month after injection in group I (P < 0.05). But results were better clinically in group II compared to group I at 2, 3, 6, and 12 months after the procedure. More than 50% of patients in both groups had excellent satisfaction.

Conclusions: Both techniques were effective in providing good analgesia. Pain relief and improvement in disability were clinically higher with PRP for longer duration.