title: A randomized, controlled trial to determine the effectiveness of fascial infiltration of bupivacaine in preventing respiratory complications after elective abdominal surgery.
abstract: A randomized, controlled trial was performed to determine whether infiltration of fascia with bupivacaine, a long-acting local anesthetic, at the time of closure after elective laparotomy, is effective in preventing postoperative respiratory complications. At the Toronto General Hospital 415 patients undergoing elective laparotomy were randomly allocated to receive bupivacaine 0.25% (2 ml/cm incision), infiltrated into the fascia evenly along both sides of the incision before wound closure (202 patients), or to have closure without infiltration (213 patients). Chest x-ray (CXR) films of all patients were obtained preoperatively and on the second postoperative day. Pulmonary function studies were performed preoperatively and for the first two consecutive days postoperatively. CXR films were scored by a blinded observer. Postoperatively, 64% of the treatment group and 56% of the control group had evidence of atelectasis on CXR films (p = NS, chi 2 test). Both groups had similar decrements in vital capacity and expiratory reserve volume on the first and second postoperative days. There was no significant difference in the amount of analgesic taken in the first 24 hours, although the time to first analgesic was significantly longer in the treatment group (2.2 vs 1.3 hours, p less than 0.055). We conclude that infiltration of the fascia with 0.25% bupivacaine at a dose of 2 ml/cm of incision is not effective in preventing postoperative atelectasis. It does not reduce use of an analgesic although it may delay its initial requirement.
mesh_terms: D000328:Adult; D000368:Aged; D002045:Bupivacaine / Q000008:administration & dosage / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D005205:Fascia; D005260:Female; D006801:Humans; D007813:Laparotomy / Q000009:adverse effects*; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000517:prevention & control*; D001261:Pulmonary Atelectasis / Q000000981:diagnostic imaging / Q000209:etiology / Q000517:prevention & control*; D011859:Radiography; D011897:Random Allocation
chemical_list: D002045:Bupivacaine