Determinants of long-term mortality after prolonged mechanical ventilation

Area of Science:

• Pulmonary Medicine
• Critical Care Medicine

Background:

• Prolonged mechanical ventilation is associated with poor long-term patient survival.
• Identifying early factors influencing survival post-discharge is crucial for improving outcomes.

Purpose of the Study:

• To assess early determinants of long-term survival after discharge from a specialized respiratory care unit.
• To identify modifiable factors that may impact survival in patients requiring prolonged mechanical ventilation.

Main Methods:

• Retrospective analysis of 113 patients admitted to a respiratory care unit (June 2001-August 2003).
• Mortality outcomes determined via record review and national Death Master File survey (April 2005).
• Collected potential determinants of survival during unit admission.

Main Results:

• Fifty-five percent of discharged patients died within the first year.
• Older age (≥65), sacral ulcers, elevated serum creatinine (>124 µmol/L), and failure to wean were associated with shorter survival.
• Age, skin integrity, and weaning status remained independent predictors in multivariable analysis; chronic neurological diseases were also significant.

Conclusions:

• High mortality rates are observed after respiratory care unit discharge.
• Interventions targeting modifiable factors like weaning, renal dysfunction, and skin breakdown may improve long-term survival.
• Early identification of risk factors is essential for patient management.