Compliance to ventilator care bundles and its association with ventilator-associated pneumonia

Purpose

Ventilator care bundles are effective in the prevention of ventilator-associated pneumonia (VAP). However, the compliance of these bundles in intensive care units (ICUs) remains poorly studied. This study investigates the Medical Information Mart for Intensive Care (MIMIC)-IV cohort’s compliance with the Institute for Healthcare Improvement (IHI) bundle and its resulting association with VAP incidence.

Methods

This is a retrospective cohort study of the MIMIC-IV database. Patients with > 48 h of invasive mechanical ventilation (IMV) were included. Diagnosis of VAP was identified with the International Classification of Diseases (ICD)-9 and ICD-10 codes. Compliance rates to the IHI bundle were extracted. The association of the IHI bundle and its individual interventions with VAP incidence was analyzed with univariate and multivariate analysis.

Results

8270 patients were included, of which 1328 (16.1%) had VAP. 25 patients (0.3%) had full compliance to the IHI bundle. 137 patients (1.7%) received no interventions from the bundle. Gastroprophylaxis had the lowest (2.1%) while head elevation had the highest (89.3%) compliance rates. In patients receiving the IHI bundle, each additional intervention was associated with lower VAP incidence (OR [odds ratio] = 0.906, 95% CI [confidence interval] 0.847–0.969). Appropriate sedation levels (OR = 0.765, 95% CI 0.661–0.885) and the use of heat and moisture exchanger (HME) filters (OR = 0.862, 95% CI 0.745–0.998) were individually associated with reduced VAP incidence, while active humidification was individually associated with increased VAP incidence (OR = 1.139, 95% CI 1.001–1.296).

Conclusion

The use of the IHI bundle was associated with a lower incidence of VAP, but compliance with the bundle was poor. Appropriate sedation and HME filters were individually associated with reduced VAP incidence. Better compliance with the IHI bundle may reduce VAP rates in mechanically ventilated patients.

Graphical Abstract