Pressure Support Ventilation Reduces Diaphragm Damage from Mechanical Ventilation
Author Information
Author(s): Futier Emmanuel, Constantin Jean-Michel, Combaret Lydie, MoMosoni Laurent, Roszyk Laurence, Sapin Vincent, Attaix Didier, Jung Boris, Jaber Samir, Bazin Jean-Etienne
Primary Institution: University Hospital of Clermont-Ferrand
Hypothesis
Mechanical ventilation in pressure support ventilation (PSV), which preserves diaphragm muscle activity, would limit diaphragmatic protein catabolism.
Conclusion
PSV is effective at reducing mechanical ventilation-induced proteolysis and inhibition of protein synthesis without increasing oxidative injury compared to continuous mechanical ventilation.
Supporting Evidence
- Diaphragmatic protein catabolism was significantly increased after 18 hours of CMV.
- CMV decreased protein synthesis by 50% after 6 hours and by 65% after 18 hours.
- PSV did not significantly increase proteolysis compared to CMV.
- Both CMV and PSV increased protein carbonyl levels after 18 hours.
Takeaway
Using a special type of breathing machine called pressure support ventilation helps protect the diaphragm muscle from damage that can happen with regular mechanical ventilation.
Methodology
Forty-two adult Sprague-Dawley rats were randomly assigned to receive either controlled mechanical ventilation (CMV) or pressure support ventilation (PSV) for 6 or 18 hours, followed by biochemical analysis of diaphragm samples.
Potential Biases
Potential bias due to the use of a single anesthetic agent across all groups.
Limitations
The anesthetic protocol may have influenced protein synthesis rates, and the study did not evaluate contractile properties of the diaphragm.
Participant Demographics
Adult male Sprague-Dawley rats, weighing approximately 250 grams.
Statistical Information
P-Value
0.0001
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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