Tuberc Respir Dis > Volume 65(4); 2008 > Article
Tuberculosis and Respiratory Diseases 2008;65(4):292-300.
DOI:    Published online October 1, 2008.
Analysis of Characteristics and Prognostic Factors in Adult Patients Receiving Mechanical Ventilation in the Medical Intensive Care Unit of a University Hospital.
Jin Woo Song, Chang Min Choi, Sang Bum Hong, Yeon Mok Oh, Tae Sun Shim, Chae Man Lim, Sang Do Lee, Woo Sung Kim, Dong Soon Kim, Won Dong Kim, Younsuck Koh
Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
Respiratory failure is a common condition that requires intensive care, and has a high mortality rate despite the recent improvements in respiratory care. Previous reports of patients with respiratory failure focused on the specific disease or included a large proportion of surgical patients. This study evaluated the clinical characteristics, outcomes and prognostic factors of adult patients receiving mechanical ventilation in a medical intensive care unit. METHODS: Retrospective chart review was performed on 479 adult patients, who received mechanical ventilation for more than 48 hours in the medical ICU of one tertiary referral hospital. RESULTS: The mean age of the patients was 60.3+/-15.6 years and 34.0% were female. The initial mean APACHE III score was 72.3+/-25. The cause of MV included acute respiratory failure (71.8%), acute exacerbation of chronic pulmonary disease (20.9%), coma (5.6%), and neuromuscular disorders (1.7%). Pressure controlled ventilation was used as the initial ventilator mode in 67.8% of patients, and pressure support ventilation was used as the initial weaning mode in 83.6% of the patients. The overall mortality rate in the ICU and hospital was 49.3% and 55.4%, respectively. The main cause of death in hospital was septic shock (32.5%), respiratory failure (11.7%), and multiorgan failure (10.2%). Males, an APACHE III score >70, the cause of respiratory failure (interstitial lung disease, coma, aspiration, pneumonia, sepsis and hemoptysis), the total ventilation time, and length of stay in hospital were independently associated with mortality. CONCLUSION: The cause of respiratory failure, severity of the patients, and gender appears to be significantly associated with the outcome of mechanical ventilatory support in patients with respiratory failure.
Key Words: Respiratory failure, Mechanical ventilation, Outcome, Prognostic factor

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