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  • Title: Postoperative analgesia with "3-in-1" femoral nerve block after prosthetic hip surgery.
    Author: Fournier R, Van Gessel E, Gaggero G, Boccovi S, Forster A, Gamulin Z.
    Journal: Can J Anaesth; 1998 Jan; 45(1):34-8. PubMed ID: 9466024.
    Abstract:
    PURPOSE: To evaluate the efficacy of a single shot "3-in-1" femoral nerve block for prosthetic hip surgery in association with general anaesthesia on post-operative analgesia. METHODS: Forty patients, ASA 1 to 3, received sham block or "3-in-1" femoral nerve block, following Winnie's landmarks with a nerve stimulator, and 40 ml bupivacaine 0.5% with epinephrine were injected after induction of anaesthesia. Vecuronium, 0.1 mg.kg-1, was added after performing the block and anaesthesia was maintained with isoflurane, oxygen 40% and nitrous oxide 60%. Fentanyl, 1.5 microgram.kg-1, was administered before incision to all patients. Heart rate, blood pressure, fentanyl requirements and FETiso were measured throughout surgery. During the post-operative period, 75 mg diclofenac i.m. and/or 0.1 mg.kg-1 morphine s.c. were administered when pain score was > 3/10 and repeated when necessary. Pain scores at first analgesic intervention, at 24 hr and 48 hr as well as diclofenac and morphine requirements after surgery were recorded. RESULTS: There was no difference in anaesthetic requirements during surgery. The time from performance of sham or "3-in-1" femoral nerve block to the first analgesic intervention (261 +/- 49 min versus 492 +/- 40 min, P < 0.05) and time from extubation to the first analgesic intervention (61 +/- 44 min vs 298 +/- 39 min, P < 0.05) were prolonged in the study group. However, pain scores and the analgesic requirements in the postoperative periods (24 and 48 hr) were similar. CONCLUSION: There is a short-term benefit during the first few postoperative hours in using a single shot "3-in-1" femoral nerve block to complement general anaesthesia for elective hip surgery.
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