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

NCT ID: NCT01679262

Last Updated: 2012-09-05

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 149 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2010-05-31
• Study Completion Date: 2012-05-31

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.

Conditions

Ear,Nose and Throat Surgery

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: PREVENTION
• Blinding Strategy: SINGLE

Study Groups

Optimal size of OPAs

Group Type: OTHER

Guedel type color-coded OPAs

Intervention Type: DEVICE

The OPAs was used four different sizes as No. 8 (80 mm, green), 9 (90 mm, yellow), 10 (100 mm, red), and 11 (110 mm, orange) in regular sequence. The curvilinear distance from the incisors to the tip of the epiglottis was measured by FOB (Olympus LF-GP; Olympus Optical Co., Tokyo, Japan) with tape marking via each size of OPAs. 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 When the size of OPAs was longer than distance from the incisors to the tip of the epiglottis, OPAs were partly withdrawn and repositioned the distal end of OPAs is placed just above the tip of epiglottis.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. .

Interventions

Guedel type color-coded OPAs

The OPAs was used four different sizes as No. 8 (80 mm, green), 9 (90 mm, yellow), 10 (100 mm, red), and 11 (110 mm, orange) in regular sequence. The curvilinear distance from the incisors to the tip of the epiglottis was measured by FOB (Olympus LF-GP; Olympus Optical Co., Tokyo, Japan) with tape marking via each size of OPAs. 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. .

Intervention Type: DEVICE

Eligibility Criteria

Inclusion Criteria

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

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

• Minimum Eligible Age: 20 Years
• Maximum Eligible Age: 70 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Yonsei University

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Locations

Wyun Kon Park, Yonsei University College of Medicine, Department of Anesthesiology and Pain Medicine

Seoul, Seoul, South Korea

Countries

South Korea

Other Identifiers

4-2007-0407

Identifier Type: -

Identifier Source: org_study_id