The Effect of Continuous Pulse Oximetry Monitoring and Early Intervention Using Wearable Device on the Incidence of Postoperative Hypoxemia

Study Overview
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Brief Summary
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Vital signs of postoperative patient are monitored intensively in post-anesthesia care unit or intensive care unit, but the frequency of surveillance decreases in typical surgical wards. The continuous pulse oximetry in surgical wards is known to be useful in detection and prevention of hypoxemia, reducing complications caused by postoperative respiratory depression. However, continuous monitoring is not conducted, due to shortage of equipment and personnel. Recently, wearable device for measuring pulse oxygen saturation, which is inexpensive, applicable to patients with mobility, and can be monitored continuously through wireless connection, has been supplied. In this study, the investigators evaluate the effect of continuous monitoring of oxygen saturation with wireless device(MASIMO Radius-7) on postoperative patients who are transferred to general wards, and evaluate the effect of early intervention in reducing the event of hypoxemia.

Official Title
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The Effect of Continuous Pulse Oximetry Monitoring and Early Intervention Using Wearable Device on the Incidence of Postoperative Hypoxemia a Randomized Controlled Trial

Conditions
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Postoperative Respiratory Complication

Intervention / Treatment
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* Device: Low flow oxygen


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients undergoing noncardiac surgery under general anesthesia American Society of Anesthesiologists (ASA) physical status class I-III Exclusion Criteria: Patients refusing to participate in the study Patients under emergency surgery Patients who wearable device is not applicable Patients scheduled to be transferred to intensive care unit Patients scheduled to receive oxygen supplementation in surgical ward Patients scheduled to undergo continuous pulse oximetry monitoring

Ages Eligible for Study
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Minimum Age: 45 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Early intervention<br>The experimental group will receive oxygen supplementation when oxygen saturation decreases according to the monitoring of wearable devices. | Device: Low flow oxygen<br>* Low flow oxygen delivered via nasal prong or facial mask. The flow rate is adjusted according to oxygen saturation of the patient.<br>|
| Active Comparator: Typical<br>The control group will receive oxygen supplementation when oxygen saturation decreases according to typical periodical monitoring. | Device: Low flow oxygen<br>* Low flow oxygen delivered via nasal prong or facial mask. The flow rate is adjusted according to oxygen saturation of the patient.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The prevalence of prolonged hypoxemic episodes | the prevalence of hypoxia lasting more than 1 hour, according to a threshold of SpO2<90% | 24 hours after transfer to surgical ward |