Determination of the Optimal Size of Oropharyngeal Airway; Correlation With External Body Measurements

Not Applicable

Completed

• Conditions: Ear,Nose and Throat Surgery
• Interventions: Device: Guedel type color-coded OPAs

• Registration Number: NCT01679262
• Lead Sponsor: Yonsei University

Brief Summary

There are several studies that have measured various oropharyngeal airway space distances using radiological method. However, direct confirmation of optimal size of oropharyneal airways (OPAs) in individual using fiberoptic bronchoscope (FOB) is lacking as now. The purposes of this study were to directly determinate the proper size of OPA in individual by FOB via different sizes of OPA in adults under general anestheisia. Additionally, we examine the relationships among the size of OPA, straight length from the incisors to the tip of the epiglottis by laryngoscopy, patient height, and external facial measurements.

Detailed Description

Not available

Basic Information
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Recruitment & Eligibility
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Study & Design
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Trial Locations

Study Timeline

• Study Start: 2010-05
• Primary Completion: 2012-05
• Study Completion: 2012-05
• Status Verified: 2012-08
• Study First Submitted: 2012-08-31
• Study First Submitted QC: 2012-08-31
• Last Update Submitted: 2012-08-31
• Study First Posted: 2012-09-05
• Last Update Posted: 2012-09-05

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 149

Inclusion Criteria

• ASA class I-II 2. 20-70 years adults

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Exclusion Criteria

• 1. an abnormal airway anatomy in preoperative radiologic study.
• 2. cervical spine pathology,
• 3. a history of difficult intubation,
• 4. neurologic disease or cardiovascular disease,
• 5. obesity (body mass index ≥ 30 kg m-1),
• 6. dental problem

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Optimal size of OPAs	Guedel type color-coded OPAs	-

Primary Outcome Measures

Name	Time	Method
Optimal size of OPA	1 min after each FOB measurement	Primary Outcome - 기술(Description) The distance from the distal end of OPA to the tip of the epiglottis was calculated by the difference between measured distance from the incisors to the tip of the epiglottis via each OPA by FOB and typical distance from the flange to distal end of each OPA via inside tube of OPA. When the size of OPAs was longer than distance from the incisors to the tip of the epiglottis, OPAs were partly withdrawn and repositioned the distal end of OPAs is placed just above the tip of epiglottis. Then, the length from the incisors to the flange of OPAs was measured. The optimal size of OPAs in individuals was defined that the distal end of OPA is placed the tip of epiglottis as close as possible without impingement on the epiglottis when the flange of OPA contact with the four central incisors.

Trial Locations

Locations (1)

Wyun Kon Park, Yonsei University College of Medicine, Department of Anesthesiology and Pain Medicine; 🇰🇷 Seoul, Korea, Republic of