PMID: 9543355Jun 6, 1998Paper

Respiratory muscle dysfunction in sepsis

Molecular and Cellular Biochemistry
S N Hussain

Abstract

It became evident in the past 12 years that venitlatory muscle contractile performance is significantly impaired during the course of septic shock. In animal models of septic shock, depression of ventilatory muscle contractile performance has been shown to cause hypercapneic ventilatory failure and respiratory arrest. Failure of ventilatory muscle contractility in septic shock has never been attributed to a single factor, but two groups of factors are likely to be involved: (a) increased ventilatory muscle metabolic demands due to augmentation of ventilation, hypoxemia and increased pulmonary impedance; and (b) specific cellular, metabolic, immune and hemodynamic defects which interfere with several processes necessary for normal force generation. These defects are mediated by complex interactions between several local and systematic mediator such a bacterial endotoxin, proinflammatory cytokines, prostaglandins, platelet activating factor, reactive oxygen species and nitric oxide. This is a summary of how these interactions are likely to interfere with ventilatory muscle contractile performance in septic shock with particular emphasis on the newly described role of nitric oxide.

Citations

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