Determining delayed admission to the intensive care unit for mechanically ventilated patients in the emergency department

作者：Hung Shih Chiang; Kung Chia Te; Hung Chih Wei; Liu Ber Ming; Liu Jien Wei; Chew Ghee; Chuang Hung Yi; Lee Wen Huei^*; Lee Tzu Chi

来源：Critical Care, 2014, 18(4): 485.

DOI：10.1186/s13054-014-0485-1

Introduction: The adverse effects of delayed admission to the intensive care unit (ICU) have been recognized in previous studies. However, the definitions of delayed admission vary across studies. This study proposed a model to define %26apos;delayed admission%26apos;, and explored the effect of ICU waiting time on patients%26apos; outcome. %26lt;br%26gt;Methods: This retrospective cohort study included nontraumatic adult patients on mechanical ventilation in the emergency department (ED), from July 2009 to June 2010. The primary outcomes measures were 21-ventilator-day mortality and prolonged hospital stays (over 30 days). Models of Cox regression and logistic regression were used for multivariate analysis. The non-delayed ICU waiting was defined as a period in which the time effect on mortality was not statistically significant in a Cox regression model. To identify a suitable cutoff point between %26apos;delayed%26apos; and %26apos;non-delayed%26apos; subsets from the overall data were made based on ICU waiting time and the hazard ratio of ICU waiting hour in each subset was iteratively calculated. The cutoff time was then used to evaluate the impact of delayed ICU admission on mortality and prolonged length of hospital stay. %26lt;br%26gt;Results: The final analysis included 1,242 patients. The time effect on mortality emerged after 4 hours, thus we deduced ICU waiting time in the ED of %26gt;4 hours as delayed. By logistic regression analysis, delayed ICU admission affected the outcomes of 21-ventilator-day mortality and prolonged hospital stay, with an odds ratio of 1.41 (95% confidence interval, 1.05 to 1.89) and 1.56 (95% confidence interval, 1.07 to 2.27) respectively. %26lt;br%26gt;Conclusions: For patients on mechanical ventilation in the ED, delayed ICU admission is associated with higher probability of mortality and additional resource expenditure. A benchmark waiting time of no more than 4 hours for ICU admission is recommended.

• 出版日期2014
• 单位长春大学