Research
Randomized trial comparing daily interruption of sedation and nursing-implemented sedation algorithm in medical intensive care unit patients
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* Corresponding author: Marjolein de Wit mdewit@mcvh-vcu.edu
1 Pulmonary and Critical Care Division, Department of Internal Medicine, School of Medicine, Virginia Commonwealth University, PO Box 980050, Richmond, VA 23298-0050, USA
2 Department of Biostatistics, School of Medicine, Virginia Commonwealth University, Box 980032, Richmond, VA, USA
3 Tufts University School of Medicine, 145 Harrison Street, Boston, MA 02111, USA
Critical Care 2008, 12:R70 doi:10.1186/cc6908
Published: 20 May 2008Abstract
Introduction
Daily interruption of sedation (DIS) and sedation algorithms (SAs) have been shown to decrease mechanical ventilation (MV) duration. We conducted a randomized study comparing these strategies.
Methods
Mechanically ventilated adults 18 years old or older in the medical intensive care unit (ICU) were randomly assigned to DIS or SA. Exclusion criteria were severe neurocognitive dysfunction, administration of neuromuscular blockers, and tracheostomy. Study endpoints were total MV duration and 28-day ventilator-free survival.
Results
The study was terminated prematurely after 74 patients were enrolled (DIS 36 and SA 38). The two groups had similar age, gender, racial distribution, Acute Physiology and Chronic Health Evaluation II score, and reason for MV. The Data Safety Monitoring Board convened after DIS patients were found to have higher hospital mortality; however, no causal connection between DIS and increased mortality was identified. Interim analysis demonstrated a significant difference in primary endpoint, and study termination was recommended. The DIS group had longer total duration of MV (median 6.7 versus 3.9 days; P = 0.0003), slower improvement of Sequential Organ Failure Assessment over time (0.70 versus 0.23 units per day; P = 0.025), longer ICU length of stay (15 versus 8 days; P < 0.0001), and longer hospital length of stay (23 versus 12 days; P = 0.01).
Conclusion
In our cohort of patients, the use of SA was associated with reduced duration of MV and lengths of stay compared with DIS. Based on these results, DIS may not be appropriate in all mechanically ventilated patients.
Trial registration
ClinicalTrials.gov NCT00205517.