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

NCT01679262 | Completed

• 1 other identifier: 4-2007-0407
• Study Type: interventional
• Target: 149
• Locations: 1 country
• Sites: 1

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

Outcome Measures

Primary Outcomes (1)

• Optimal size of OPA

  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 When the size of OPAs was longer than distance from the incisors to the tip of the epiglottis, OPAs were partly withdrawn and repositioned the distal end of OPAs is placed just above the tip of epiglottis.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.

  1 min after each FOB measurement

Study Arms (1)

Optimal size of OPAs

OTHER

Device: Guedel type color-coded OPAs

Interventions

Guedel type color-coded OPAs 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. .

Optimal size of OPAs

Eligibility Criteria

• Age: 20 Years - 70 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

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

You may not qualify if:

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

Sponsors & Collaborators

• Yonsei University: lead

Study Sites (1)

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

Seoul, Seoul, 120-752, South Korea

Location

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: NA
• Masking: SINGLE
• Who Masked: OUTCOMES ASSESSOR
• Purpose: PREVENTION
• Intervention Model: SINGLE GROUP
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: August 31, 2012
• First Posted: September 5, 2012
• Study Start: May 1, 2010
• Primary Completion: May 1, 2012
• Study Completion: May 1, 2012
• Last Updated: September 5, 2012

Record last verified: 2012-08

Locations

KR (1)