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Frei DR, Beasley R, Campbell D, Forbes A, Leslie K, Mackle D, Martin C, Merry A, Moore MR, Myles PS, Ruawai-Hamilton L, Short TG, Young PJ. A vanguard randomised feasibility trial comparing three regimens of peri-operative oxygen therapy on recovery after major surgery. Anaesthesia 2023; 78:1272-1284. [PMID: 37531294 DOI: 10.1111/anae.16103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/02/2023] [Indexed: 08/04/2023]
Abstract
International recommendations encourage liberal administration of oxygen to patients having surgery under general anaesthesia, ostensibly to reduce surgical site infection. However, the optimal oxygen regimen to minimise postoperative complications and enhance recovery from surgery remains uncertain. The hospital operating theatre randomised oxygen (HOT-ROX) trial is a multicentre, patient- and assessor-blinded, parallel-group, randomised clinical trial designed to assess the effect of a restricted, standard care, or liberal peri-operative oxygen therapy regimen on days alive and at home after surgery in adults undergoing prolonged non-cardiac surgery under general anaesthesia. Here, we report the findings of the internal vanguard feasibility phase of the trial undertaken in four large metropolitan hospitals in Australia and New Zealand that included the first 210 patients of a planned overall 2640 trial sample, with eight pre-specified endpoints evaluating protocol implementation and safety. We screened a total of 956 participants between 1 September 2019 and 26 January 2021, with data from 210 participants included in the analysis. Median (IQR [range]) time-weighted average intra-operative Fi O2 was 0.30 (0.26-0.35 [0.20-0.59]) and 0.47 (0.44-0.51 [0.37-0.68]) for restricted and standard care, respectively (mean difference (95%CI) 0.17 (0.14-0.20), p < 0.001). Median time-weighted average intra-operative Fi O2 was 0.83 (0.80-0.85 [0.70-0.91]) for liberal oxygen therapy (mean difference (95%CI) compared with standard care 0.36 (0.33-0.39), p < 0.001). All feasibility endpoints were met. There were no significant patient adverse events. These data support the feasibility of proceeding with the HOT-ROX trial without major protocol modifications.
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Affiliation(s)
- D R Frei
- Department of Anaesthesia and Pain Management, Wellington Hospital, Wellington, New Zealand
- Medical Research Institute of New Zealand, Wellington, New Zealand
| | - R Beasley
- Medical Research Institute of New Zealand, Wellington, New Zealand
| | - D Campbell
- Department of Anaesthesiology, University of Auckland, Auckland, New Zealand
- Department of Anaesthesia and Peri-operative Medicine, Auckland City Hospital, Auckland, New Zealand
| | - A Forbes
- Biostatistics Unit, Division of Research Methodology, School of Public Health and Preventive Medicine, Faculty of Medicine, Nursing, and Health Sciences, Monash University, Melbourne, VIC, Australia
| | - K Leslie
- Department of Anaesthesia and Pain Management, Royal Melbourne Hospital, Melbourne, VIC, Australia
- Department of Critical Care, Melbourne Medical School, University of Melbourne, Melbourne, VIC, Australia
| | - D Mackle
- Medical Research Institute of New Zealand, Wellington, New Zealand
| | - C Martin
- Biostatistics Unit, Division of Research Methodology, School of Public Health and Preventive Medicine, Faculty of Medicine, Nursing, and Health Sciences, Monash University, Melbourne, VIC, Australia
| | - A Merry
- Department of Anaesthesiology, University of Auckland, Auckland, New Zealand
| | - M R Moore
- Department of Anaesthesiology, University of Auckland, Auckland, New Zealand
| | - P S Myles
- Department of Anaesthesiology and Peri-operative Medicine, Alfred Hospital, Melbourne, VIC, Australia
- Department of Anaesthesiology and Peri-operative Medicine, Central Clinical School, Faculty of Medicine, Nursing, and Health Sciences, Monash University, Melbourne, VIC, Australia
| | - L Ruawai-Hamilton
- Department of Anaesthesia and Pain Management, Wellington Hospital, Wellington, New Zealand
| | - T G Short
- Department of Anaesthesia and Peri-operative Medicine, Auckland City Hospital, Auckland, New Zealand
- Department of Anaesthesiology, University of Auckland, Auckland, New Zealand
| | - P J Young
- Department of Anaesthesiology, University of Auckland, Auckland, New Zealand
- Department of Intensive Care, Wellington Regional Hospital, Wellington, New Zealand
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