Abstract

PURPOSE: In rats, controlled mechanical ventilation (CMV) induced a profound reduction in diaphragm (DIA) muscle force-generating capacity as early as 24h, whereas in rabbits a similar decline was observed after 48h. Conflicting responses in rats and rabbits were extended to high-dose of methylprednisolone (MP). In rats, high-dose MP had a protective effect on CMV-induced DIA dysfunction (Respir Research 2010), whereas in rabbits had a deleterious effect (Muscle Nerve 2011). This study aimed to determine DIA force-generating capacity in animal model of critical-illness myopathy in which both cisatracurium (NM) and high-dose MP were administered in rats and rabbits receiving CMV for 48 h.

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