Obesity as a Predictor of Prolonged Mechanical Ventilation

Area of Science:

• Critical Care Medicine
• Pulmonary Medicine
• Internal Medicine

Background:

• Prolonged mechanical ventilation (PMV) is a significant concern in medical intensive care units (MICUs).
• Predictive tools like the I-TRACH scale aim to identify patients at risk for PMV.
• The role of obesity in predicting PMV requires further investigation.

Purpose of the Study:

• To evaluate the predictive value of obesity, defined by body mass index (BMI) >30, in conjunction with I-TRACH scale parameters for prolonged mechanical ventilation.
• To determine if incorporating BMI improves the prediction of prolonged mechanical ventilation compared to the I-TRACH scale alone.

Main Methods:

• Retrospective cohort study involving 455 patients requiring mechanical ventilation in a tertiary care MICU.
• Data collected included demographics, clinical parameters, duration of ventilation, and BMI.
• Statistical analysis, including univariate and multivariate regression, was used to identify predictors of prolonged mechanical ventilation (≥10 or ≥14 days).

Main Results:

• A body mass index (BMI) >30 was found to be a statistically significant predictor of prolonged mechanical ventilation (P < .05).
• The parameters of the I-TRACH scale, individually or combined, did not demonstrate significant predictive value for prolonged mechanical ventilation.
• Average ventilation duration was 10.4 days, with a wide range observed.

Conclusions:

• Obesity (BMI >30) is a significant independent predictor of prolonged mechanical ventilation in MICU patients.
• The I-TRACH scale parameters alone are not reliable predictors of prolonged mechanical ventilation.
• Including BMI in predictive models can enhance the assessment of prolonged mechanical ventilation risk in critically ill patients.