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Humphreys S, von Ungern-Sternberg BS, Skowno J, Williams T, Taylor J, Taverner F, Gibbons K, Burgoyne L, Sommerfield D, Stephens P, Hallett B, Vijayasekaran S, Slee N, Burns H, Sowa M, Davidson A, Schibler A. High-flow oxygen for children's airway surgery: rando mi sed controll ed trial protocol (HAMSTER). BMJ Open 2019; 9:e031873. [PMID: 31615801 PMCID: PMC6797255 DOI: 10.1136/bmjopen-2019-031873] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
INTRODUCTION Hypoxaemia during anaesthesia for tubeless upper airway surgery in children with abnormal airways is common due to the complexity of balancing adequate depth of anaesthesia with maintenance of spontaneous breathing and providing an uninterrupted field of view of the upper airway for the surgeon. High-flow nasal oxygenation (HIGH-FLOW) can prolong safe apnoea time and be used in children with abnormal airways but to date has not been compared with the alternative technique of low-flow nasal oxygenation (LOW-FLOW). The aim is to investigate if use of HIGH-FLOW can reduce the number of hypoxaemic events requiring rescue oxygenation compared with LOW-FLOW. METHODS AND ANALYSIS: High-flow oxygen for children's airway surgery: randomised controlled trial (HAMSTER) is a multicentre, unmasked, randomised controlled, parallel group, superiority trial comparing two oxygenation techniques during anaesthesia. Children (n=530) aged >37 weeks to 16 years presenting for elective tubeless upper airway surgery who fulfil inclusion but not exclusion criteria will be randomised prior to surgery to HIGH-FLOW or LOW-FLOW post induction of anaesthesia. Maintenance of anaesthesia with HIGH-FLOW requires Total IntraVenous Anaesthesia (TIVA) and with LOW-FLOW, either inhalational or TIVA at discretion of anaesthetist. The primary outcome is the incidence of hypoxaemic events requiring interruption of procedure for rescue oxygenation by positive pressure ventilation and the secondary outcome includes total hypoxaemia time, adverse cardiorespiratory events and unexpected paediatric intensive care admission admission. Hypoxaemia is defined as Sp02 <90%. Analysis will be conducted on an intention-to-treat basis. ETHICS AND DISSEMINATION Ethical approval has been obtained by Children's Health Queensland Human Research Ethics Committee (HREC/18/QRCH/130). The trial commenced recruitment in 2018. The primary manuscript will be submitted for publication in a peer-reviewed journal. TRIAL REGISTRATION NUMBER The HAMSTER is registered with the Australia and New Zealand Clinical TrialsRegistry: ACTRN12618000949280.
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Affiliation(s)
- Susan Humphreys
- Paediatric Critical Care Research Group, Child Health Research Centre, The University of Queensland, Brisbane, Queensland, Australia
- Department of Anaesthesia, Queensland Children's Hospital, South Brisbane, Queensland, Australia
| | - Britta Sylvia von Ungern-Sternberg
- Anaesthesia, Perth Children's Hospital, Nedlands, Queensland, Australia
- University of Western Australia, Crawley, Western Australia, Australia
| | - Justin Skowno
- Department of Anaesthesia, Children's Hospital at Westmead, Westmead, New South Wales, Australia
- Discipline of Child and Adolescent Health, University of Sydney, Sydney, New South Wales, Australia
| | - Tara Williams
- Paediatric Critical Care Research Group, Child Health Research Centre, The University of Queensland, Brisbane, Queensland, Australia
| | - Julia Taylor
- Paediatric Critical Care Research Group, Child Health Research Centre, The University of Queensland, Brisbane, Queensland, Australia
- Department of Anaesthesia, Queensland Children's Hospital, South Brisbane, Queensland, Australia
| | - Fiona Taverner
- Department of Anaesthesia, Women's and Children's Hospital Adelaide, North Adelaide, South Australia, Australia
- University of South Australia, Adelaide, South Australia, Australia
| | - Kristen Gibbons
- Statistics, Mater Medical Research Institute, South Brisbane, Queensland, Australia
| | - Laura Burgoyne
- Department of Anaesthesia, Women's and Children's Hospital Adelaide, North Adelaide, South Australia, Australia
- University of South Australia, Adelaide, South Australia, Australia
| | - David Sommerfield
- Anaesthesia, Perth Children's Hospital, Nedlands, Queensland, Australia
- University of Western Australia, Crawley, Western Australia, Australia
| | - Philip Stephens
- Department of Anaesthesia, Queensland Children's Hospital, South Brisbane, Queensland, Australia
| | - Ben Hallett
- Department of Anaesthesia, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia
| | - Shyan Vijayasekaran
- University of Western Australia, Crawley, Western Australia, Australia
- Ear, Nose and Throat Surgery, Perth Children's Hospital, Nedlands, Queensland, Australia
| | - Nicola Slee
- Department of Surgery; Ear, Nose and Throat, Queensland Children's Hospital, South Brisbane, Queensland, Australia
| | - Hannah Burns
- Department of Surgery; Ear, Nose and Throat, Queensland Children's Hospital, South Brisbane, Queensland, Australia
| | - Marcin Sowa
- Health Economics, The University of Queensland, South Brisbane, Queensland, Australia
| | - Andrew Davidson
- Department of Anaesthesia, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia
- Murdoch Childrens Research Institute, Parkville, Victoria, Australia
| | - Andreas Schibler
- Paediatric Critical Care Research Group, Child Health Research Centre, The University of Queensland, Brisbane, Queensland, Australia
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