TY - JOUR
T1 - Daily intra-abdominal pressure, sequential organ failure score and fluid balance predict duration of mechanical ventilation
AU - Iyer, Dushyant
AU - Hunt, Leanne
AU - Frost, Steven A.
AU - Aneman, Anders
PY - 2018
Y1 - 2018
N2 - Background: Elevated intra-abdominal pressure (IAP) is a common occurrence in mechanically ventilated patients in the intensive care unit (ICU). This study was undertaken to determine the relationship between IAP, pulmonary compliance and the duration of mechanical ventilation. Methods: A prospective study of 220 consecutively enrolled mechanically ventilated patients admitted to a mixed surgical-medical ICU in a tertiary referral hospital. The IAP was measured at least twice daily, benchmarked against consensus guidelines. Dynamic pulmonary compliance was calculated together with admission Acute Physiology and Chronic Health Evaluation (APACHE III) score and daily Sequential Organ Failure Assessment (SOFA) score. Results: No relationship between highest IAP for the day and pulmonary compliance (P=0.61) was found. For each 5mm Hg increase in IAP, the risk of remaining intubated increased 19% (HR=1.19, 95% CI: 0.98-1.44); for each standard deviation increase in SOFA score (3.7 points), the risk of remaining intubated increased by 14% (HR=1.14, 95% CI: 0.98-1.33); and for each 1 L increase in fluid balance, the risk of remaining intubated increased by 11% (HR=1.11, 95% CI: 1.04-1.19). A nomogram was developed to predict the probability of extubation based on daily highest IAP for the day, SOFA score and fluid balance. Conclusion: IAPs did not correlate with pulmonary compliance in critically ill patients. Increased IAP was associated with a longer duration of mechanical ventilation. A nomogram integrating daily IAP, SOFA score and fluid balance may be used to predict the duration of mechanical ventilation.
AB - Background: Elevated intra-abdominal pressure (IAP) is a common occurrence in mechanically ventilated patients in the intensive care unit (ICU). This study was undertaken to determine the relationship between IAP, pulmonary compliance and the duration of mechanical ventilation. Methods: A prospective study of 220 consecutively enrolled mechanically ventilated patients admitted to a mixed surgical-medical ICU in a tertiary referral hospital. The IAP was measured at least twice daily, benchmarked against consensus guidelines. Dynamic pulmonary compliance was calculated together with admission Acute Physiology and Chronic Health Evaluation (APACHE III) score and daily Sequential Organ Failure Assessment (SOFA) score. Results: No relationship between highest IAP for the day and pulmonary compliance (P=0.61) was found. For each 5mm Hg increase in IAP, the risk of remaining intubated increased 19% (HR=1.19, 95% CI: 0.98-1.44); for each standard deviation increase in SOFA score (3.7 points), the risk of remaining intubated increased by 14% (HR=1.14, 95% CI: 0.98-1.33); and for each 1 L increase in fluid balance, the risk of remaining intubated increased by 11% (HR=1.11, 95% CI: 1.04-1.19). A nomogram was developed to predict the probability of extubation based on daily highest IAP for the day, SOFA score and fluid balance. Conclusion: IAPs did not correlate with pulmonary compliance in critically ill patients. Increased IAP was associated with a longer duration of mechanical ventilation. A nomogram integrating daily IAP, SOFA score and fluid balance may be used to predict the duration of mechanical ventilation.
KW - artificial respiration
KW - body fluid disorders
KW - intensive care units
KW - intra-abdominal pressure
KW - multiple organ failure
UR - http://handle.westernsydney.edu.au:8081/1959.7/uws:49692
U2 - 10.1111/aas.13211
DO - 10.1111/aas.13211
M3 - Article
SN - 1399-6576
SN - 0001-5172
VL - 62
SP - 1421
EP - 1427
JO - Acta Anaesthesiologica Scandinavica
JF - Acta Anaesthesiologica Scandinavica
IS - 10
ER -