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Fitzgerald N, Thiruvenkatarajan V, Brown-Beresford K, Liu WM, Gupta D, Van Wijk RM, Ludbrook GL. Incidence and predictors of airway obstruction during high-flow nasal oxygen assisted procedural sedation during gastrointestinal interventions: A prospective observational study. J Clin Anesth 2023; 89:111160. [PMID: 37321125 DOI: 10.1016/j.jclinane.2023.111160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 05/22/2023] [Accepted: 05/29/2023] [Indexed: 06/17/2023]
Affiliation(s)
- Nicholas Fitzgerald
- Department of Anaesthesia, The Queen Elizabeth Hospital, Woodville, South Australia, Australia
| | - Venkatesan Thiruvenkatarajan
- Department of Anaesthesia, The Queen Elizabeth Hospital, Woodville, South Australia, Australia; Discipline of Acute Care Medicine, University of Adelaide, South Australia, Australia.
| | - Kate Brown-Beresford
- Department of Anaesthesia, The Queen Elizabeth Hospital, Woodville, South Australia, Australia
| | - Wai-Man Liu
- Research School of Finance, Actuarial Studies and Statistics, The Australian National University, Canberra, ACT, Australia
| | - Drishti Gupta
- School of Medicine, University of Adelaide, South Australia, Australia
| | - Roelof M Van Wijk
- Department of Anaesthesia, The Queen Elizabeth Hospital, Woodville, South Australia, Australia; Discipline of Acute Care Medicine, University of Adelaide, South Australia, Australia
| | - Guy L Ludbrook
- Discipline of Acute Care Medicine, University of Adelaide, South Australia, Australia
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Thiruvenkatarajan V, Dharmalingam A, Arenas G, Wahba M, Liu WM, Zaw Y, Steiner R, Tran A, Currie J. Effect of high-flow vs. low-flow nasal plus mouthguard oxygen therapy on hypoxaemia during sedation: a multicentre randomised controlled trial. Anaesthesia 2021; 77:46-53. [PMID: 34182603 DOI: 10.1111/anae.15527] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/11/2021] [Indexed: 11/29/2022]
Abstract
Whether high-flow vs. low-flow nasal oxygen reduces hypoxaemia for sedation during endoscopic retrograde cholangiopancreatography is currently unknown. In this multicentre trial, 132 patients ASA physical status 3 or higher, BMI > 30 kg.m-2 or with known or suspected obstructive sleep apnoea were randomly allocated to high-flow nasal oxygen up to 60 l.min-1 at 100% FI O2 or low-flow nasal oxygen at 4 l.min-1 . The low-flow nasal oxygen group also received oxygen at 4 l.min-1 through an oxygenating mouthguard, totalling 8 l.min-1 . Primary outcome was hypoxaemia, defined as Sp O2 < 90% regardless of duration. Hypoxaemia occurred in 7.7% (5/65) of patients with high-flow and 9.1% (6/66) with low-flow nasal oxygen (percentage point difference -1.4%, 95%CI -10.9 to 8.0; p = 0.77). Between the groups, there were no significant differences in frequency of hypoxaemic episodes; lowest Sp O2 ; peak transcutaneous carbon dioxide; hypercarbia (transcutaneous carbon dioxide > 2.66 kPa from baseline); requirement of chin lift/jaw thrust; nasopharyngeal airway insertion; bag-mask ventilation; or tracheal intubation. Following adjustment for duration of the procedure, the primary outcome remained non-significant. In high-risk patients undergoing endoscopic retrograde cholangiopancreatography, oxygen therapy with high-flow nasal oxygen did not reduce the rate of hypoxaemia, hypercarbia or the need for airway interventions, compared with combined oral and nasal low-flow oxygen.
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Affiliation(s)
- V Thiruvenkatarajan
- Department of Anaesthesia, Queen Elizabeth Hospital, Woodville, SA, Australia.,Discipline of Acute Care Medicine, University of Adelaide, Adelaide, SA, Australia
| | - A Dharmalingam
- Department of Anaesthesia, John Hunter Hospital, New Lambton Heights, NSW, Australia.,School of Medicine and Public Health, University of Newcastle, Callagen, NSW, Australia
| | - G Arenas
- Department of Anaesthesia, Royal Adelaide Hospital, Adelaide, SA, Australia.,Discipline of Acute Care Medicine, University of Adelaide, Adelaide,, SA, Australia
| | - M Wahba
- Department of Anaesthesia, Queen Elizabeth Hospital, Woodville, SA, Australia
| | - W-M Liu
- Research School of Finance, Actuarial Studies and Statistics, Australian National University, Canberra, ACT, Australia
| | - Y Zaw
- Queen Elizabeth Hospital, Woodville, SA, Australia
| | - R Steiner
- Department of Anaesthesia, Queen Elizabeth Hospital, Woodville, SA, Australia
| | - A Tran
- Royal Adelaide Hospital, Adelaide, SA, Australia
| | - J Currie
- Queen Elizabeth Hospital, Woodville, SA, Australia
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