ĐÁNH GIÁ HIỆU QUẢ GIẢM ĐAU SAU PHẪU THUẬT HÀM MẶT CỦA PHONG BẾ DÂY V2, V3 DƯỚI HƯỚNG DẪN SIÊU ÂM BẰNG ROPIVACAINE PHỐI HỢP DEXAMETHASONE

Abstract

Objective: To compare the pain-reducing effects of nerve block on the V2 and V3 cranial nerves under ultrasound guidance between the Ropivacaine-only group and the Ropivacaine combined with Dexamethasone group. Method: Prospective study, randomized, controlled, single-blind clinical trial. 60 patients were randomly divided into two groups: group RD (Ropivacaine and Dexamethasone, n=30) and group R (Ropivacaine alone, n=30). Results: The pain relief duration in the group treated with Ropivacaine and Dexamethasone was longer than that of the group treated with Ropivacaine alone. This was shown by the rate of patients not requiring postoperative pain relief in the RD group being 93% higher than that in the R group being 60%, the difference was statistically significant (p < 0.05). The VAS scores at rest and movement at all time points in the RD group were lower than those in the R group, this difference was statistically significant for the movement VAS at 1 hour, 2 hours, 3 hours, 6 hours, 9 hours, 12 hours, 18 hours after nerve block V2, V3 (p < 0.05). The RD group had an insignificantly higher rate of satisfaction – 96.7% patients being very satisfied compared to 93% patients in the R group. The side effects of nausea, itching and numbness were low in both groups and had no difference (p>0.05). Conclusion: Using Ropivacaine combined with dexamethasone in V2, V3 nerve block prolongs the pain relief duration after maxillofacial surgery and improves VAS scores at all time points compared to using Ropivacaine alone.