The effect of proactive versus reactive treatment of hypotension on postoperative disability and outcome in surgical patients under anaesthesia (PRETREAT): clinical trial protocol and considerations
Matthijs Kant,
Wilton A. van Klei,
Markus W. Hollmann,
Denise P. Veelo,
Teus H. Kappen,
Eline de Klerk,
Lisette Vernooij,
Luuk C. Otterspoor,
Geert-Jan E. Cromheecke,
Marlous Huijzer,
Jannie Witziers,
Lotte E. Terwindt,
Tim Bastiaanse,
Rogier V. Immink,
Magnus Strypet,
Niek H. Sperna Weiland,
Marije Wijnberge,
Marc G.H. Besselink,
Lisette M. Vernooij,
Yvonne C. Janmaat,
Annemarie Akkermans
Affiliations
Matthijs Kant
Department of Anaesthesiology, University Medical Centre Utrecht, Utrecht, The Netherlands; Corresponding author.
Wilton A. van Klei
Department of Anaesthesiology, University Medical Centre Utrecht, Utrecht, The Netherlands
Markus W. Hollmann
Department of Anaesthesiology, Amsterdam University Medical Centre, Location University of Amsterdam, Amsterdam, The Netherlands
Denise P. Veelo
Department of Anaesthesiology, Amsterdam University Medical Centre, Location University of Amsterdam, Amsterdam, The Netherlands
Teus H. Kappen
Department of Anaesthesiology, University Medical Centre Utrecht, Utrecht, The Netherlands
Eline de Klerk
Department of Anaesthesiology, Amsterdam University Medical Centre, Location University of Amsterdam, Amsterdam, The Netherlands
Lisette Vernooij
Department of Anaesthesiology, University Medical Centre Utrecht, Utrecht, The Netherlands
Luuk C. Otterspoor
Department of Cardiology and Department of Intensive Care Medicine, Catharina Hospital, Eindhoven, The Netherlands
Geert-Jan E. Cromheecke
Department of Anaesthesiology, University Medical Centre Utrecht, Utrecht, The Netherlands
Marlous Huijzer
Department of Anaesthesiology, University Medical Centre Utrecht, Utrecht, The Netherlands
Jannie Witziers
Department of Anaesthesiology, University Medical Centre Utrecht, Utrecht, The Netherlands
Lotte E. Terwindt
Department of Anaesthesiology, Amsterdam University Medical Centre, Location University of Amsterdam, Amsterdam, The Netherlands
Tim Bastiaanse
Department of Anaesthesiology, Amsterdam University Medical Centre, Location University of Amsterdam, Amsterdam, The Netherlands
Rogier V. Immink
Department of Anaesthesiology, Amsterdam University Medical Centre, Location University of Amsterdam, Amsterdam, The Netherlands
Magnus Strypet
Department of Anaesthesiology, Amsterdam University Medical Centre, Location University of Amsterdam, Amsterdam, The Netherlands
Niek H. Sperna Weiland
Department of Anaesthesiology, Amsterdam University Medical Centre, Location University of Amsterdam, Amsterdam, The Netherlands
Marije Wijnberge
Department of Anaesthesiology, Amsterdam University Medical Centre, Location University of Amsterdam, Amsterdam, The Netherlands
Marc G.H. Besselink
Department of Anaesthesiology, Amsterdam University Medical Centre, Location University of Amsterdam, Amsterdam, The Netherlands
Lisette M. Vernooij
Department of Anaesthesiology, University Medical Centre Utrecht, Utrecht, The Netherlands
Yvonne C. Janmaat
Department of Anaesthesiology, University Medical Centre Utrecht, Utrecht, The Netherlands
Annemarie Akkermans
Department of Anaesthesiology, University Medical Centre Utrecht, Utrecht, The Netherlands
Background: Intraoperative hypotension has been extensively studied for its association with adverse outcomes. However, small sample sizes and methodological issues limit the causal inference that can be drawn. Methods: In this multicentre, adaptive, randomised controlled trial, we will include 5000 adult inpatients scheduled for elective non-cardiac surgery under general or central neuraxial anaesthesia. Patients will be either randomly allocated to the intervention or care-as-usual group using computer-generated blocks of four, six, or eight, with an allocation ratio of 1:1. In the intervention arm patients will be divided into low-, intermediate-, and high-risk groups based on their likelihood to experience intraoperative hypotension, with resulting mean blood pressure targets of 70, 80, and 90 mm Hg, respectively. Anaesthesia teams will be provided with a clinical guideline on how to keep patients at their target blood pressure. During the first 6 months of the trial the intervention strategy will be evaluated and further revised in adaptation cycles of 3 weeks if necessary, to improve successful impact on the clinical process. The primary outcome is postoperative disability after 6 months measured with the World Health Organization Disability Assessment Score (WHODAS) 2.0 questionnaire. Ethics and dissemination: This study protocol has been approved by the Medical Ethics Committee of the University Medical Centre Utrecht (20–749) and all protocol amendments will be communicated to the Medical Ethics Committee. The study protocol is in adherence with the Declaration of Helsinki and the guideline of Good Clinical Practice. Dissemination plans include publication in a peer-reviewed journal. Clinical trial registration: The Dutch Trial Register, NL9391. Registered on 22 March 2021.
