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

Yonsei University

Status: Completed

Conditions: Ear,Nose and Throat Surgery

Treatments: Device: Guedel type color-coded OPAs

Study type: Interventional

Funder types: Other

Identifiers

NCT01679262

4-2007-0407

Details and patient eligibility

About

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.

Enrollment: 149 patients

Sex: All

Ages: 20 to 70 years old

Volunteers: No Healthy Volunteers

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

Trial design

Primary purpose: Prevention

Allocation: N/A

Interventional model: Single Group Assignment

Masking: Single Blind

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149 participants in 1 patient group

Optimal size of OPAs

Other group

Treatment:

Device: Guedel type color-coded OPAs