Determination of the Optimal Size of Oropharyngeal Airway; Correlation With External Body Measurements
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ClinicalTrials.gov Identifier: NCT01679262 |
Recruitment Status :
Completed
First Posted : September 5, 2012
Last Update Posted : September 5, 2012
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Condition or disease | Intervention/treatment | Phase |
---|---|---|
Ear,Nose and Throat Surgery | Device: Guedel type color-coded OPAs | Not Applicable |
Study Type : | Interventional (Clinical Trial) |
Actual Enrollment : | 149 participants |
Allocation: | N/A |
Intervention Model: | Single Group Assignment |
Masking: | Single (Outcomes Assessor) |
Primary Purpose: | Prevention |
Study Start Date : | May 2010 |
Actual Primary Completion Date : | May 2012 |
Actual Study Completion Date : | May 2012 |
Arm | Intervention/treatment |
---|---|
Optimal size of OPAs |
Device: 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 When the size of OPAs was longer than distance from the incisors to the tip of the epiglottis, OPAs were partly withdrawn and repositioned the distal end of OPAs is placed just above the tip of epiglottis.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. . |
- Optimal size of OPA [ Time Frame: 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 When the size of OPAs was longer than distance from the incisors to the tip of the epiglottis, OPAs were partly withdrawn and repositioned the distal end of OPAs is placed just above the tip of epiglottis.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.

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Ages Eligible for Study: | 20 Years to 70 Years (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
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

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01679262
Korea, Republic of | |
Wyun Kon Park, Yonsei University College of Medicine, Department of Anesthesiology and Pain Medicine | |
Seoul, Korea, Republic of, 120-752 |
Responsible Party: | Yonsei University |
ClinicalTrials.gov Identifier: | NCT01679262 |
Other Study ID Numbers: |
4-2007-0407 |
First Posted: | September 5, 2012 Key Record Dates |
Last Update Posted: | September 5, 2012 |
Last Verified: | August 2012 |