Eun-Hee Kim, Jung-Bin Park, Pyoyoon Kang, Sang-Hwan Ji, Young-Eun Jang, Ji-Hyun Lee, Hee-Soo Kim, Jin-Tae Kim
{"title":"Oxygen reserve index versus conventional peripheral oxygen saturation for prevention of hypoxaemia: A randomised controlled trial.","authors":"Eun-Hee Kim, Jung-Bin Park, Pyoyoon Kang, Sang-Hwan Ji, Young-Eun Jang, Ji-Hyun Lee, Hee-Soo Kim, Jin-Tae Kim","doi":"10.1097/EJA.0000000000002018","DOIUrl":null,"url":null,"abstract":"<p><strong>Background: </strong>Hypoxaemia occurs frequently during paediatric laryngeal microsurgery.</p><p><strong>Objective: </strong>The oxygen reserve index is a noninvasive and continuous parameter to assess PaO2 levels in the range of 100 to 200 mmHg. It ranges from 0 to 1.0. We investigated whether monitoring the oxygen reserve index can reduce the incidence of SpO2 90% or less.</p><p><strong>Design: </strong>Randomised controlled trial.</p><p><strong>Setting: </strong>A tertiary care paediatric hospital.</p><p><strong>Participants: </strong>Paediatric patients aged 18 years or less scheduled to undergo laryngeal microsurgery.</p><p><strong>Intervention: </strong>The patients were randomly allocated to the oxygen reserve index or control groups, and stratified based on the presence of a tracheostomy tube. Rescue intervention was performed when the oxygen reserve index was 0.2 or less and the SpO2 was 94% or less in the oxygen reserve index and control groups, respectively.</p><p><strong>Main outcome measure: </strong>The primary outcome was the incidence of SpO2 90% or less during the surgery.</p><p><strong>Results: </strong>Data from 88 patients were analysed. The incidence of SpO2 ≤ 90% did not differ between the oxygen reserve index and control groups [P = 0.114; 11/44, 25% vs. 18/44, 40.9%; relative risk: 1.27; and 95% confidence interval (CI): 0.94 to 1.72]. Among the 128 rescue interventions, SpO2 ≤ 90% event developed in 18 out of 75 events (24%) and 42 out of 53 events (79.2%) in the oxygen reserve index and control groups, respectively (P < 0.001; difference: 55.2%; and 95% CI 38.5 to 67.2%). The number of SpO2 ≤ 90% events per patient in the oxygen reserve index group (median 0, maximum 3) was less than that in the control group (median 0, maximum 8, P = 0.031).</p><p><strong>Conclusion: </strong>Additional monitoring of the oxygen reserve index, with a target value of greater than 0.2 during paediatric airway surgery, alongside peripheral oxygen saturation, did not reduce the incidence of SpO2 ≤ 90%.</p>","PeriodicalId":11920,"journal":{"name":"European Journal of Anaesthesiology","volume":null,"pages":null},"PeriodicalIF":4.2000,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"European Journal of Anaesthesiology","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1097/EJA.0000000000002018","RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/5/27 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"ANESTHESIOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Background: Hypoxaemia occurs frequently during paediatric laryngeal microsurgery.
Objective: The oxygen reserve index is a noninvasive and continuous parameter to assess PaO2 levels in the range of 100 to 200 mmHg. It ranges from 0 to 1.0. We investigated whether monitoring the oxygen reserve index can reduce the incidence of SpO2 90% or less.
Design: Randomised controlled trial.
Setting: A tertiary care paediatric hospital.
Participants: Paediatric patients aged 18 years or less scheduled to undergo laryngeal microsurgery.
Intervention: The patients were randomly allocated to the oxygen reserve index or control groups, and stratified based on the presence of a tracheostomy tube. Rescue intervention was performed when the oxygen reserve index was 0.2 or less and the SpO2 was 94% or less in the oxygen reserve index and control groups, respectively.
Main outcome measure: The primary outcome was the incidence of SpO2 90% or less during the surgery.
Results: Data from 88 patients were analysed. The incidence of SpO2 ≤ 90% did not differ between the oxygen reserve index and control groups [P = 0.114; 11/44, 25% vs. 18/44, 40.9%; relative risk: 1.27; and 95% confidence interval (CI): 0.94 to 1.72]. Among the 128 rescue interventions, SpO2 ≤ 90% event developed in 18 out of 75 events (24%) and 42 out of 53 events (79.2%) in the oxygen reserve index and control groups, respectively (P < 0.001; difference: 55.2%; and 95% CI 38.5 to 67.2%). The number of SpO2 ≤ 90% events per patient in the oxygen reserve index group (median 0, maximum 3) was less than that in the control group (median 0, maximum 8, P = 0.031).
Conclusion: Additional monitoring of the oxygen reserve index, with a target value of greater than 0.2 during paediatric airway surgery, alongside peripheral oxygen saturation, did not reduce the incidence of SpO2 ≤ 90%.
期刊介绍:
The European Journal of Anaesthesiology (EJA) publishes original work of high scientific quality in the field of anaesthesiology, pain, emergency medicine and intensive care. Preference is given to experimental work or clinical observation in man, and to laboratory work of clinical relevance. The journal also publishes commissioned reviews by an authority, editorials, invited commentaries, special articles, pro and con debates, and short reports (correspondences, case reports, short reports of clinical studies).