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Critical Care

, 5:P51 | Cite as

Early prediction of mechanical ventilation length of stay (MV-LOS) forpatients submitted to heart surgery

  • HTF Mendonça F°
  • LA Campos
  • RV Gomes
  • MA Fernandes
  • PM Nogueira
  • J Sabino
  • FG Aranha
  • DJ Silva F°
  • R Farina
  • HF Dohmann
Meeting abstract
  • 741 Downloads

Keywords

Chronic Obstructive Pulmonary Disease Sofa Score Vasoactive Agent Postoperative Level Left Ventricle Systolic Function 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Background

Among clinical cardiologists, intensivists and cardiac surgeons, weaning from mechanical ventilation is usually considered a major determinant of short course outcome for patients submitted to heart surgery.

Objective

To determine factors collected preoperatively, perioperatively and within the first 24 h postoperative that could predict the MV-LOS.

Methods

We retrospectively analyzed 207 patients submitted to heart surgery from June 2000 to February 2001 at a tertiary care cardiology hospital, correlating data obtained before, during, and within first 24 h postoperative to LOS-MV. Data were treated applying linear regression and R-R2 goodness-of-fit statistics.

Results

Under univariate analysis one could note significant predictive value of the variables age (P = 0.001), body mass index (P = 0.004), reoperation (P < 0.001), hemotransfusion (P < 0.001), pre-existing chronic obstructive pulmonary disease (P = 0.02) and diabetes mellitus (P = 0.005), preoperative (P = 0.004) levels of creatinine, immediate postoperative levels of arterial bicarbonate (P = 0.004), oxygen alveolar-arterial gradient (P = 0.002), first posoperative day (FPD) MODs (P = 0.018), and SOFA scores (P = 0.015) and pressure-adjusted heart rate (PAR; P < 0.001). Multivariate analysis (R=0.791, R2=0.625, R2 adjusted=0.594) revealed significant predictive value of the variables age (P < 0.001), PAR (P = 0.006), preoperative creatinine (P = 0.003), hemotransfusion (P < 0.001), arterial bicarbonate (P = 0.003) and reoperation (P < 0.001).

Conclusion

In our sample only the variables age, reoperation, pre- and postoperative creatinine levels, total hemotransfusion, and arterial bicarbonate level at immediate postoperative and PAR in FDP demonstrated significant correlation to LOS-MV. Even under univariate analysis, variables like previous left ventricle systolic function, length of extracorporeal circulation, Cleveland Clinic score, and use of vasoactive agents demonstrated no relevant correlation to MV-LOS.

Copyright information

© The Author(s) 2010

Authors and Affiliations

  • HTF Mendonça F°
    • 1
  • LA Campos
    • 1
  • RV Gomes
    • 1
  • MA Fernandes
    • 1
  • PM Nogueira
    • 1
  • J Sabino
    • 1
  • FG Aranha
    • 1
  • DJ Silva F°
    • 1
  • R Farina
    • 1
  • HF Dohmann
    • 1
  1. 1.Hospital Pró-CardíacoSurgical Intensive Care UnitRio de JaneiroBrazil

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