• Nicholas Heming, Souheil Elatrous, Samir Jaber, Anne Sylvie Dumenil, Joël Cousson, Xavier Forceville, Antoine Kimmoun, Jean Louis Trouillet, Jérôme Fichet, Nadia Anguel, Michael Darmon, Claude Martin, Sylvie Chevret, Djillali Annane, and CRISTAL Investigators.
• General Intensive Care Unit, Raymond Poincaré Hospital, Garches, France.
• BMJ Open. 2017 Oct 6; 7 (10): e016736.

ObjectiveTo compare the haemodynamic effect of crystalloids and colloids during acute severe hypovolaemic shock.DesignExploratory subgroup analysis of a multicentre randomised controlled trial (Colloids Versus Crystalloids for the Resuscitation of the Critically Ill, CRISTAL, ClinicalTrials.gov NCT00318942).SettingCRISTAL was conducted in intensive care units in Europe, North Africa and Canada.ParticipantsCurrent analysis included all patients who had a pulmonary artery catheter in place at randomisation. 220 patients (117 received crystalloids vs 103 colloids) underwent pulmonary artery catheterisation.InterventionCrystalloids versus colloids for fluid resuscitation in hypovolaemic shock.Outcome MeasuresHaemodynamic data were collected at the time of randomisation and subsequently on days 1, 2, 3, 4, 5, 6 and 7.ResultsMedian cumulative volume of fluid administered during the first 7 days was higher in the crystalloids group than in the colloids group (3500 (2000-6000) vs 2500 (1000-4000) mL, p=0.01). Patients in the colloids arm exhibited a lower heart rate over time compared with those allocated to the crystalloids arm (p=0.014). There was no significant difference in Cardiac Index (p=0.053), mean blood pressure (p=0.4), arterial lactates (p=0.9) or global Sequential Organ Failure Assessment score (p=0.3) over time between arms.ConclusionsDuring acute severe hypovolaemic shock, patients monitored by a pulmonary artery catheter achieved broadly similar haemodynamic outcomes, using lower volumes of colloids than crystalloids. The heart rate was lower in the colloids arm.© Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2017. All rights reserved. No commercial use is permitted unless otherwise expressly granted.

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