alexa The Progression of Isoflurane-induced Malignant Hyperthermia and Its Attenuation by Cisatracurium in a Pre-clinical Porcine Model of Heart Transplant | Abstract
ISSN: 2155-6148

Journal of Anesthesia & Clinical Research
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Research Article

The Progression of Isoflurane-induced Malignant Hyperthermia and Its Attenuation by Cisatracurium in a Pre-clinical Porcine Model of Heart Transplant

Samar K Lowalekar1*, Haiyan Cao1 , Xiu-Gui Lu1, Patrick R Treanor2, Charles K Allam3, Vladimir Birjiniuk4, Kay B Leissner5,6 and Hemant S Thatte1

1Departments of Surgery, Cardiothoracic Surgery Division, Harvard Medical School, VA Boston Healthcare System, Brigham and Women’s Hospital, Boston, Massachusetts, USA

2VA Boston Healthcare System, Boston, Massachusetts, USA

3Department of Pathology, VA Boston Healthcare System, Boston, Massachusetts, USA

4Harvard Medical School, Mt. Auburn Hospital, Boston, Massachusetts, USA

5Department of Anesthesiology, Harvard Medical School, Boston, Massachusetts, USA

6Boston University, Boston, Massachusetts, USA

*Corresponding Author:
Samar Lowalekar
Research Service (MC 151)
Harvard Medical School
VA Boston Healthcare System
1400 V. F. W. Parkway
West Roxbury, MA 02132, USA
Tel: 857-203-5914
Fax: 857-203-5592
E-mail: [email protected]

Received date: October 04, 2013; Accepted date: November 22, 2013; Published date: November 24, 2013

Citation: Lowalekar SK, Cao H, Lu XG, Treanor CCP PR, Allam CK, et al. (2013) The Progression of Isoflurane-induced Malignant Hyperthermia and Its Attenuation by Cisatracurium in a Pre-clinical Porcine Model of Heart Transplant. J Anesth Clin Res 4:365. doi: 10.4172/2155-6148.1000365

Copyright: © 2013 Lowalekar SK, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Background: Even after several years of study, the intra-operative diagnosis of Malignant Hyperthermia (MH) and the approach to anesthesia in MH-susceptible individuals has remained a challenge. In this study we present the pre-operative and intra-operative findings of development and progression of MH in a porcine model that was assigned for heart transplants.

Methods: Female Yorkshire swine were assigned as either donor or recipient and anesthetized with inhalational isoflurane with or without cisatracurium. The inadvertent development of signs indicating MH, including, alterations required in ventilator/bypass machine settings, arterial and venous blood tests, gross- and histo-pathology, were followed through the surgeries that lasted for variable durations between donors and recipients.

Results: Both donors and the recipients were apparently MH-susceptible, and showed systemic intraoperative signs of variable severity, that were greater in longer duration recipient surgeries, and in those in which cisatracurium was not administered. These included features of hypermetabolism such as elevated pCO2 and serum lactate, increased requirements for O2 (FIO2), and multi-organ changes, including pulmonary congestion, features of intestinal pseudo-obstruction, and inflammatory infiltrates in livers and hearts.

Conclusions: The isoflurane-induced MH progressed temporally in severity with the duration of surgery. Use of cisatracurium was directly beneficial in attenuating and/or delaying the progress of MH.

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