Age-Specific Efficacy of Platelet-Rich Plasma in Tonsillectomy: A Systematic Review and Meta-Analysis

Background/Objectives: The objective of this study was to evaluate age-specific effects of intraoperative platelet-rich plasma (PRP) administration on postoperative pain, wound healing, and bleeding after tonsillectomy. Methods: PubMed, Embase, Scopus, Google Scholar, and Cochrane databases were searched from inception to October 2025. Randomized controlled trials comparing intraoperative PRP with placebo or no treatment in patients undergoing tonsillectomy were included. Data on postoperative pain, wound healing, and bleeding were extracted and analyzed using standardized mean differences (SMDs) and odds ratios (ORs) with 95% confidence intervals (CIs). Subgroup analyses were performed by age (adults versus children) and by postoperative day. Results: Nine randomized controlled trials comprising 442 participants were included. In adults, PRP significantly reduced postoperative pain (SMD = -1.26 [-1.70 to -0.81]) and improved wound healing (SMD = -1.43 [-2.65 to -0.22]). The analgesic effect was greatest during the early recovery period (postoperative days 0-5) and diminished thereafter. There were no significant differences in primary postoperative bleeding (OR = 0.49 [0.04 to 5.61]) or secondary postoperative bleeding (OR = 0.23 [0.02 to 2.16]) between the PRP and control groups. In children, PRP did not significantly affect pain or bleeding outcomes. Conclusions: Intraoperative PRP may reduce early postoperative pain and may promote mucosal recovery in adults. However, its clinical efficacy in children remains unclear. Further well-designed, age-stratified trials are warranted to clarify the role of PRP in enhancing postoperative recovery.