Nosocomial infections and balloon counterpulsation: risk factors and outcome

Area of Science:

• Cardiovascular Surgery
• Infectious Diseases
• Critical Care Medicine

Background:

• Intra-aortic balloon counterpulsation (IABC) is used in cardiac surgery patients.
• Nosocomial infections are a significant concern in this population.
• Understanding risk factors is crucial for improving patient outcomes.

Purpose of the Study:

• To identify risk factors for nosocomial infections in cardiac surgery patients receiving IABC.
• To analyze the association between specific factors and infection development.
• To evaluate the impact of IABC on patient mortality.

Main Methods:

• Retrospective analysis of 2,558 cardiac surgery patients from February to September 2003.
• 136 patients received IABC, divided into infected (Group 1) and non-infected (Group 2) cohorts.
• Univariate and multivariate analyses were performed to identify risk factors.

Main Results:

• Significant univariate risk factors included operation time, IABC duration, ventilation hours, central venous catheter duration, blood transfusions, low ejection fraction, cardiopulmonary bypass, combined procedures, re-exploration, and APACHE II score.
• Multivariate analysis identified ventilation hours and blood transfusions as independent predictors of infection.
• Respiratory tract infections were common (41.1%) in the IABC group.
• Mortality was higher in IABC patients (19.9%) versus controls (1.1%), but similar between infected and non-infected IABC groups.

Conclusions:

• Ventilation duration and blood transfusion amount are independent risk factors for nosocomial infections in cardiac surgery patients with IABC.
• Identifying these risk factors aids in targeted surveillance and potentially improves prognosis.
• IABC support is associated with increased mortality, emphasizing the need for careful patient selection and management.