Ventilator-Associated Pneumonia Predicts Severe Cognitive Disability in Severe Traumatic Brain Injury

Area of Science:

• Neurology
• Critical Care Medicine
• Infectious Disease

Background:

• Ventilator-associated pneumonia (VAP) is a known complication in severe traumatic brain injury (TBI) patients, associated with adverse outcomes.
• The specific impact of VAP on long-term cognitive disability following TBI remains largely unexplored.

Purpose of the Study:

• To investigate the association between the development of VAP and severe cognitive disability in adult patients with severe TBI.
• To identify VAP as a potential risk factor for cognitive impairment in this patient cohort.

Main Methods:

• A post hoc analysis was conducted on data from a prospective, multi-center, observational study involving 309 adult patients with severe blunt TBI.
• Patients were categorized based on the occurrence of VAP, and severe cognitive disability was defined as a Disability Rating Scale (DRS) score >13 at discharge or 28 days post-injury.
• Multivariable regression analysis was employed to determine independent risk factors for severe cognitive disability.

Main Results:

• 31.7% of patients developed VAP. The VAP group exhibited higher rates of diffuse axonal injury, neurosurgical interventions, and tracheostomies, along with longer mechanical ventilation durations.
• Patients with VAP had significantly higher proportions of severe cognitive disability (64.3% vs. 19.9%) and worse median DRS scores (8 vs. 2).
• VAP was identified as an independent risk factor for severe cognitive disability (aOR: 4.2, 95% CI: 2.2-7.8).

Conclusions:

• Ventilator-associated pneumonia is a prevalent complication in severe TBI patients.
• VAP is a significant risk factor associated with severe cognitive disability in this population.
• Implementing VAP prevention strategies may be crucial for mitigating cognitive impairment in TBI patients.