Alexandru Tutunaru1, Julien Dupont2, Vincent Huberty3, Mostafa Ibrahim3, Didier Serteyn2, Charlotte Sandersen2. 1. Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium. Electronic address: actutunaru@ulg.ac.be. 2. Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium. 3. Hôpital Erasme-Gastroenterology, Université Libre de Bruxelles, Bruxelles, Belgium.
Abstract
OBJECTIVE: To determine the dose of cis-atracurium needed to produce a moderate neuromuscular blockade (NMB) in pigs. STUDY DESIGN: Prospective experimental study. ANIMALS: Seven pigs [five females and two males; median (range) body weight: 47 (36-64) kg]. METHODS: Pigs were premedicated with intramuscular midazolam (0.3 mg kg-1) and ketamine (7 mg kg-1). Anaesthesia was induced with intravenous (IV) propofol 3 (1-4) mg kg-1 and maintained with isoflurane in oxygen. Based on a preliminary study, the subjects were administered 0.3 mg kg-1 cis-atracurium followed by 0.48 mg kg-1 hour-1 constant rate infusion (CRI) IV. A moderate NMB was defined as a train-of-four (TOF) count of ≤2 by acceleromyography. When the TOF count was >2, 0.1 mg kg-1 cis-atracurium was administered and the CRI was increased. The cis-atracurium CRI was decreased when the TOF count was under 2 for more than 15 minutes. The total dose of cis-atracurium required to maintain a moderate NMB was calculated as the total amount of cis-atracurium used (both CRI and supplementary boluses) divided by the administration time. RESULTS: The cis-atracurium CRI lasted for 87 (76-151) minutes. To induce and maintain a moderate neuromuscular blockade, the initial dose of cis-atracurium was 0.3 (0.3- 0.5) mg kg-1 and the CRI was 0.71 (0.37-0.98) mg kg-1 hour-1. CONCLUSIONS AND CLINICAL RELEVANCE: The doses described in our study may help researchers obtain a moderate NMB using cis-atracurium in pigs.
OBJECTIVE: To determine the dose of cis-atracurium needed to produce a moderate neuromuscular blockade (NMB) in pigs. STUDY DESIGN: Prospective experimental study. ANIMALS: Seven pigs [five females and two males; median (range) body weight: 47 (36-64) kg]. METHODS:Pigs were premedicated with intramuscular midazolam (0.3 mg kg-1) and ketamine (7 mg kg-1). Anaesthesia was induced with intravenous (IV) propofol 3 (1-4) mg kg-1 and maintained with isoflurane in oxygen. Based on a preliminary study, the subjects were administered 0.3 mg kg-1 cis-atracurium followed by 0.48 mg kg-1 hour-1 constant rate infusion (CRI) IV. A moderate NMB was defined as a train-of-four (TOF) count of ≤2 by acceleromyography. When the TOF count was >2, 0.1 mg kg-1 cis-atracurium was administered and the CRI was increased. The cis-atracurium CRI was decreased when the TOF count was under 2 for more than 15 minutes. The total dose of cis-atracurium required to maintain a moderate NMB was calculated as the total amount of cis-atracurium used (both CRI and supplementary boluses) divided by the administration time. RESULTS: The cis-atracurium CRI lasted for 87 (76-151) minutes. To induce and maintain a moderate neuromuscular blockade, the initial dose of cis-atracurium was 0.3 (0.3- 0.5) mg kg-1 and the CRI was 0.71 (0.37-0.98) mg kg-1 hour-1. CONCLUSIONS AND CLINICAL RELEVANCE: The doses described in our study may help researchers obtain a moderate NMB using cis-atracurium in pigs.
Authors: Alexandru Tutunaru; Julien Dupont; Alexandra Gougnard; Keila Ida; Didier Serteyn; Charlotte Sandersen Journal: PLoS One Date: 2019-08-15 Impact factor: 3.240