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Publication Detail
Induced hypothermia in patients with septic shock and respiratory failure (CASS): A randomised, controlled, open-label trial
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Article
  • Authors:
    Itenov TS, Johansen ME, Bestle M, Thormar K, Hein L, Gyldensted L, Lindhardt A, Christensen H, Estrup S, Pedersen HP, Harmon M, Soni UK, Perez-Protto S, Wesche N, Skram U, Petersen JA, Mohr T, Waldau T, Poulsen LM, Strange D, Juffermans NP, Sessler DI, Tønnesen E, Møller K, Kristensen DK, Cozzi-Lepri A, Lundgren JD, Jensen JU
  • Publication date:
    03/2018
  • Journal:
    The Lancet Respiratory Medicine
  • Status:
    Accepted
  • Print ISSN:
    2213-2600
Abstract
© 2018 Elsevier Ltd. Background: Animal models of serious infection suggest that 24 h of induced hypothermia improves circulatory and respiratory function and reduces mortality. We tested the hypothesis that a reduction of core temperature to 32-34°C attenuates organ dysfunction and reduces mortality in ventilator-dependent patients with septic shock. Methods: In this randomised, controlled, open-label trial, we recruited patients from ten intensive care units (ICUs) in three countries in Europe and North America. Inclusion criteria for patients with severe sepsis or septic shock were a mean arterial pressure of less than 70 mm Hg, mechanical ventilation in an ICU, age at least 50 years, predicted length of stay in the ICU at least 24 h, and recruitment into the study within 6 h of fulfilling inclusion criteria. Exclusion criteria were uncontrolled bleeding, clinically important bleeding disorder, recent open surgery, pregnancy or breastfeeding, or involuntary psychiatric admission. We randomly allocated patients 1:1 (with variable block sizes ranging from four to eight; stratified by predictors of mortality, age, Acute Physiology and Chronic Health Evaluation II score, and study site) to routine thermal management or 24 h of induced hypothermia (target 32-34°C) followed by 48 h of normothermia (36-38°C). The primary endpoint was 30 day all-cause mortality in the modified intention-to-treat population (all randomly allocated patients except those for whom consent was withdrawn or who were discovered to meet an exclusion criterion after randomisation but before receiving the trial intervention). Patients and health-care professionals giving the intervention were not masked to treatment allocation, but assessors of the primary outcome were. This trial is registered with ClinicalTrials.gov, number NCT01455116. Findings: Between Nov 1, 2011, and Nov 4, 2016, we screened 5695 patients. After recruitment of 436 of the planned 560 participants, the trial was terminated for futility (220 [50%] randomly allocated to hypothermia and 216 [50%] to routine thermal management). In the hypothermia group, 96 (44·2%) of 217 died within 30 days versus 77 (35·8%) of 215 in the routine thermal management group (difference 8·4% [95% CI -0·8 to 17·6]; relative risk 1·2 [1·0-1·6] ; p=0·07]). Interpretation: Among patients with septic shock and ventilator-dependent respiratory failure, induced hypothermia does not reduce mortality. Induced hypothermia should not be used in patients with septic shock. Funding: Trygfonden, Lundbeckfonden, and the Danish National Research Foundation.
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