The effect of neuromuscular blockade on canine laparoscopic ovariectomy: A double-blinded, prospective clinical trial

Abstract

The Effect of Neuromuscular Blockade on Canine Laparoscopic Ovariectomy: A Double-Blinded, Prospective Clinical Trial Bart Van Goethem, Diplomate ECVS, Sebastiaan Alexander van Nimwegen, PhD, Ies Akkerdaas, DVM, Joanna Claire Murrell, BVSc., PhD, Diplomate ECVAA, and Jolle Kirpensteijn, PhD, Diplomate ACVS & ECVS Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 108, 3584CM, Utrecht, The Netherlands Corresponding Author: Bart Van Goethem, Diplomate ECVS, Department of Small Animal Medicine and Clinical Biology, Faculty of Veterinary Medicine, Gent University, Gent, Belgium E-mail: Bart.vangoethem@UGent.be Submitted July 2010 Accepted November 2011 DOI:10.1111/j.1532-950X.2011.00962.x Objective: To evaluate the effect of neuromuscular blockade (NMB) on surgical time and various anesthetic variables during laparoscopic ovariectomy in dogs. Study Design: Prospective, double-blinded, randomized clinical trial. Animals: Female dogs (n = 40). Methods: Laparoscopic ovariectomy by bipolar electrocoagulation was performed by 1 surgeon using a standardized protocol, where 1 ovary was removed under NMB, and the other without NMB. Surgical and anesthetic (respiratory and circulatory) variables were recorded for predetermined procedural stages and were statistically evaluated. Results: Mean total surgical time was 25.1 ± 6.3 minutes (range, 16–47 minutes). With NMB, mean duration of surgical excision of the ovary (5.7 ± 2.3 minutes) was not significantly changed compared to ovariectomy without NMB (5.9 ± 1.9 minutes). Arterial blood pressure was the only recorded anesthetic variable that significantly changed under NMB (5% decrease). Occurrence of intraoperative complications did not differ. In obese dogs, total surgical time was increased by 22%. Other variables, including occurrence of intraoperative mesovarial bleeding did not influence surgical duration. Conclusions: NMB did not significantly improve laparoscopic ovariectomy times and except for a 5% decrease in arterial blood pressure did not change any of the evaluated anesthetic and surgical variables.