Early intensive care sedation predicts long-term mortality in ventilated critically ill patients

Shehabi, Yahya, Bellomo, Rinaldo, Reade, Michael C., Bailey, Michael, Bass, Frances, Howe, Belinda, McArthur, Colin, Seppelt, Ian M., Webb, Steve, Weisbrodt, Leonie and Sedation Practice in Intensive Care Evaluation (SPICE) Study Investigators and the ANZICS Clinical Trials Group (2012) Early intensive care sedation predicts long-term mortality in ventilated critically ill patients. American Journal of Respiratory and Critical Care Medicine, 186 8: 724-731. doi:10.1164/rccm.201203-0522OC

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Author Shehabi, Yahya
Bellomo, Rinaldo
Reade, Michael C.
Bailey, Michael
Bass, Frances
Howe, Belinda
McArthur, Colin
Seppelt, Ian M.
Webb, Steve
Weisbrodt, Leonie
Sedation Practice in Intensive Care Evaluation (SPICE) Study Investigators and the ANZICS Clinical Trials Group
Title Early intensive care sedation predicts long-term mortality in ventilated critically ill patients
Journal name American Journal of Respiratory and Critical Care Medicine   Check publisher's open access policy
ISSN 1073-449X
1535-4970
Publication date 2012-10-01
Sub-type Article (original research)
DOI 10.1164/rccm.201203-0522OC
Volume 186
Issue 8
Start page 724
End page 731
Total pages 8
Place of publication New York, NY, United States
Publisher American Thoracic Society
Language eng
Formatted abstract
Rationale: Choice and intensity of early (first 48 h) sedation may affect short- and long-term outcome.

Objectives:
To investigate the relationships between early sedation and time to extubation, delirium, and hospital and 180-day mortality among ventilated critically ill patients in the intensive care unit (ICU).

Methods:  Multicenter (25 Australia and New Zealand hospitals) prospective longitudinal (ICU admission to 28 d) cohort study of medical/surgical patients ventilated and sedated 24 hours or more. We assessed administration of sedative agents, ventilation time, sedation depth using Richmond Agitation Sedation Scale (RASS, four hourly), delirium (daily), and hospital and 180-day mortality. We used multivariable Cox regression to quantify relationships between early deep sedation (RASS, -3 to -5) and patients' outcomes.

Measurements and
Main Results:  We studied 251 patients (mean age, 61.7 ± 15.9 yr; mean Acute Physiology and Chronic Health Evaluation [APACHE] II score, 20.8 ± 7.8), with 21.1% (53) hospital and 25.8% (64) 180-day mortality. Over 2,678 study days, we completed 14,736 RASS assessments. Deep sedation occurred in 191 (76.1%) patients within 4 hours of commencing ventilation and in 171 (68%) patients at 48 hours. Delirium occurred in 111 (50.7%) patients with median (interquartile range) duration of 2 (1-4) days. After adjusting for diagnosis, age, sex, APACHE II, operative, elective, hospital type, early use of vasopressors, and dialysis, early deep sedation was an independent predictor of time to extubation (hazard ratio [HR], 0.90; 95% confidence interval [CI], 0.87-0.94; P < 0.001), hospital death (HR, 1.11; 95% CI, 1.02-1.20; P = 0.01), and 180-day mortality (HR, 1.08; 95% CI, 1.01-1.16; P = 0.026) but not delirium occurring after 48 hours (P = 0.19).

Conclusions:
Early sedation depth independently predicts delayed extubation and increased mortality, making it a potential target for interventional studies.
Keyword Ventilation
Mortality
Sedation
Delirium
Intensive care
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published ahead of print on 2 August 2012.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2013 Collection
School of Medicine Publications
 
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Created: Sun, 25 Nov 2012, 10:22:09 EST by System User on behalf of Anaesthesiology and Critical Care - RBWH