• Alain Deschamps, Richard Hall, Hilary Grocott, C David Mazer, Peter T Choi, Alexis F Turgeon, Etienne de Medicis, Jean S Bussières, Christopher Hudson, Summer Syed, Doug Seal, Stuart Herd, Jean Lambert, André Denault, Alan Mutch, Alexis Turgeon, Andre Denault, Andrea Todd, Angela Jerath, Ashraf Fayad, Barry Finnegan, Blaine Kent, Brent Kennedy, Brian H Cuthbertson, Brian Kavanagh, Brian Warriner, Charles MacAdams, Christian Lehmann, Christine Fudorow, Colin McCartney, Dan McIsaac, Daniel Dubois, David Campbell, David Mazer, David Neilpovitz, David Rosen, Davy Cheng, Dennis Drapeau, Derek Dillane, Diem Tran, Dolores Mckeen, Duminda Wijeysundera, Eric Jacobsohn, Etienne Couture, Fahad Alam, Faraj Abdallah, Fiona E Ralley, Frances Chung, Francois Lellouche, Gary Dobson, Genevieve Germain, George Djaiani, Ian Gilron, Gregory Hare, Gregory Bryson, Hance Clarke, Heather McDonald, Helen Roman-Smith, Homer Yang, James Douketis, James Paul, Jean Beaubien, Jean Bussières, Jeremy Pridham, J N Armstrong, Joel Parlow, John Murkin, Jonathan Gamble, Kaylene Duttchen, Keyvan Karkouti, Kim Turner, Leyla Baghirzada, Linda Szabo, Manoj Lalu, Marcin Wasowicz, Michael Bautista, Michael Jacka, Michael Murphy, Michael Schmidt, Michaël Verret, Michel-Antoine Perrault, Nicolas Beaudet, Norman Buckley, Peter Choi, Peter MacDougall, Philip Jones, Pierre Drolet, Pierre Beaulieu, Ravi Taneja, Rene Martin, Ronald George, Rosa Chun, Sarah McMullen, Scott Beattie, Sonia Sampson, Stephen Choi, Stephen Kowalski, Stuart McCluskey, Sylvain Boet, Tim Ramsay, Tarit Saha, Thomas Mutter, Tumul Chowdhury, Vishal Uppal, William Mckay, and Canadian Perioperative Anesthesia Clinical Trials Group.
• From the Department of Anesthesiology (A. Deschamps, A. Denault) and Department of Intensive Care Medicine (A. Denault), Montreal Heart Institute, University of Montreal, Montreal, Quebec, Canada; Department of Anesthesiology and Critical Care Medicine, Queen Elizabeth II Health Science Centre, Dalhousie University, Halifax, Canada (R.H.); Department of Anesthesiology, University of Manitoba, St. Boniface Hospital, Winnipeg, Manitoba, Canada (H.G.); Department of Anesthesia, University of Toronto, Keenan Research Centre for Biomedical Science, Li Ka Shing Knowledge Institute of St. Michael's Hospital, Toronto, Ontario, Canada (C.D.M.); Department of Anesthesiology Pharmacology and Therapeutics, University of British Columbia, Vancouver, British Columbia, Canada (P.T.C.); Department of Anesthesiology and Critical Care Medicine, Division of Critical Care Medicine, and Population Health and Optimal Health Practices, CHU de Québec Research Center, CHU de Québec, Université Laval, Quebec City, Quebec, Canada (A.F.T.); Department of Anesthesiology, CHU de Sherbrooke, Université de Sherbrooke, Sherbrooke, Quebec, Canada (E.d.M.); Department of Anesthesiology, Institut universitaire de cardiologie et de pneumologie de Québec, Université Laval, Quebec, Canada (J.S.B.); Department of Anesthesiology, Ottawa Heart Institute, University of Ottawa, Ottawa, Ontario, Canada (C.H.); Department of Anesthesiology, McMaster University, Hamilton, Ontario, Canada (S.S.); Department of Anesthesiology, Calgary Foothills Hospital, University of Calgary, Calgary, Alberta, Canada (D.S.); Department of Anesthesiology, Vancouver General Hospital, University of British Columbia, Vancouver, British Columbia, Canada (S.H.); and Department of Social and Preventive Medicine, University of Montreal, Montreal, Quebec, Canada (J.L.).Montreal Heart Institute, Montreal, QuébecUniversity of Manitoba, Winnipeg, ManitobaUniversité Laval, Québec, QuébecPh.D., Montreal Heart Institute, Montreal, Qu
• Anesthesiology. 2016 Apr 1; 124 (4): 826-36.

BackgroundCerebral oxygen desaturation during cardiac surgery has been associated with adverse perioperative outcomes. Before a large multicenter randomized controlled trial (RCT) on the impact of preventing desaturations on perioperative outcomes, the authors undertook a randomized prospective, parallel-arm, multicenter feasibility RCT to determine whether an intervention algorithm could prevent desaturations.MethodsEight Canadian sites randomized 201 patients between April 2012 and October 2013. The primary outcome was the success rate of reversing cerebral desaturations below 10% relative to baseline in the intervention group. Anesthesiologists were blinded to the cerebral saturation values in the control group. Intensive care unit personnel were blinded to cerebral saturation values for both groups. Secondary outcomes included the area under the curve of cerebral desaturation load, enrolment rates, and a 30-day follow-up for adverse events.ResultsCerebral desaturations occurred in 71 (70%) of the 102 intervention group patients and 56 (57%) of the 99 control group patients (P = 0.04). Reversal was successful in 69 (97%) of the intervention group patients. The mean cerebral desaturation load (SD) in the operating room was smaller for intervention group patients compared with control group patients (104 [217] %.min vs. 398 [869] %.min, mean difference, -294; 95% CI, -562 to -26; P = 0.03). This was also true in the intensive care unit (P = 0.02). There were no differences in adverse events between the groups.ConclusionsStudy sites were successful in reversal of desaturation, patient recruitment, randomization, and follow-up in cardiac surgery, supporting the feasibility of conducting a large multicenter RCT.

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