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Preoperative maximal expiratory pressure is associated with duration of invasive mechanical ventilation after cardiac

Maurice Zanini1, Rosane Maria Nery2, Raquel Petry Buhler3

  • 1Federal University of Rio Grande do Sul, Hospital de Clínicas de Porto Alegre, Brazil.

Heart & Lung : the Journal of Critical Care
|February 25, 2016
PubMed
Abstract

Insights

Preoperative maximal expiratory pressure (MEP) predicts shorter invasive mechanical ventilation (IMV) duration in cardiac surgery patients. Higher MEP indicates a reduced need for prolonged IMV, aiding in better postoperative outcomes.

Area of Science:

  • Cardiology
  • Pulmonology
  • Critical Care Medicine

Background:

  • Prolonged invasive mechanical ventilation (IMV) increases risks of infections, extended hospital stays, and mortality.
  • Pulmonary function tests (PFTs) show potential in predicting postoperative results in cardiac surgery patients.

Purpose of the Study:

  • To investigate the relationship between maximal expiratory pressure (MEP), maximal inspiratory pressure (MIP), and peak expiratory flow (PEF) and the duration of IMV.
  • To determine if PFTs can predict IMV duration in patients undergoing cardiac surgery.

Main Methods:

  • Recruited patients undergoing cardiac surgery.
  • Measured MEP, MIP, and PEF before surgery.
  • Utilized multivariable linear regression to analyze the association between PFTs and IMV duration, controlling for confounders.

Main Results:

  • 125 patients were included in the analysis.
  • Higher MEP was significantly associated with a shorter duration of IMV (P=0.015) after adjusting for confounders.
  • No significant association was found between MIP or PEF and IMV duration.

Conclusions:

  • Preoperative MEP is a significant predictor of IMV duration in patients undergoing elective cardiac surgery.
  • MEP may serve as a valuable tool for risk stratification and predicting postoperative ventilation requirements.
Keywords:
Coronary artery bypass graftingHeart valve replacementMechanical ventilationRespiratory functionRespiratory pressure

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