Prolonged Invasive Mechanical Ventilation in a Tertiary Respiratory ICU: Outcomes, Challenges, and Future Directions

Area of Science:

• Critical Care Medicine
• Pulmonology
• Infectious Diseases

Background:

• Prolonged invasive mechanical ventilation (PMV) poses significant challenges in critical care, leading to high mortality and morbidity.
• Limited data exist on PMV management and outcomes in resource-limited settings, particularly from specialized Respiratory Intensive Care Units (RICUs).

Purpose of the Study:

• To evaluate the clinical characteristics, management strategies, and outcomes of patients requiring PMV in a tertiary RICU.
• To assess the effectiveness of standardized weaning protocols in a high-acuity patient population.

Main Methods:

• An observational case series of 40 consecutive patients requiring PMV (>7 days) in a tertiary RICU.
• Data collection included demographics, diagnoses, severity scores (APACHE II), microbiology, and ventilatory parameters.
• Standardized protocols for weaning, tracheostomy, non-invasive ventilation (NIV), physiotherapy, and multidisciplinary care were applied.

Main Results:

• The cohort had high illness severity (mean APACHE II score 36.5) and frequent multidrug-resistant infections (e.g., Pseudomonas aeruginosa, Klebsiella pneumoniae).
• 42.5% of patients were successfully weaned, and 30% were decannulated, with a mean ventilation duration of 14 days and hospital stay of 48 days.
• Observed survival exceeded predicted mortality; successful outcomes correlated with early tracheostomy, targeted antimicrobial therapy, structured weaning, early mobilization, and nutritional support.

Conclusions:

• PMV in a tertiary RICU, despite associated morbidity, can yield meaningful weaning success via a protocolized, multidisciplinary approach.
• Outcomes in this high-acuity cohort were favorable compared to general ICU data, even without dedicated weaning units.
• Specialized weaning units and post-discharge follow-up could further enhance outcomes, especially in resource-constrained environments.