Improvement of the Glottic View by the Use of Video Laryngoscope
Trial Snapshot
- Phase
- Not Applicable
- Enrollment
- 39
- Locations
- 1
- Primary Endpoint
- POGO (Percentage of Glottic Opening) score
Study Overview
Brief Summary
This study aims to compare the exposure of glottis by the use of video and direct laryngoscopy.
Detailed Description
It is well known that a video laryngoscope can provide better glottic view than a direct laryngoscope. However, to date, a direct laryngoscope has been the standard equipment for tracheal intubation. Recently, it seems that use of the video laryngoscope has increased. However, the advantage of the video laryngoscope over a direct laryngoscope has not been measured quantitatively. In this study, the glottic view by the use of video laryngoscope will be compared with that of the direct laryngoscope simultaneously, by using C-MAC S-imager installed with a disposable Macintosh blade. Intubating anesthesiologists will use it as if it is a direct laryngoscope. Simultaneously, the glottic views visualized on the monitor of the video laryngoscope will be recorded and evaluated later. For quantitative comparison, the glottic view will be scored with the Percentage of glottic opening scale, for both direct laryngoscopy and video laryngoscopy. Also, the glottic view will be compared by Cormack-Lehane grade.
Study Design
- Study Type
- Observational
- Observational Model
- Case Only
- Time Perspective
- Prospective
Eligibility Criteria
- Ages
- 18 Years to — (Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- •Patients who are over 18 years old, and are planning surgeries that require general anesthesia and tracheal intubation.
Exclusion Criteria
- •Patients who are not agreed to participate in the trial
- •Patients who have a poor dental condition which requires other than direct laryngoscopy
- •Patients who require rapid sequence induction technique
- •Patients with cervical spine instability
Outcomes
Primary Outcomes
POGO (Percentage of Glottic Opening) score
Time Frame: during laryngoscopy
POGO (Percentage of Glottic Opening) score of the glottic view by video/direct laryngoscope during laryngoscopy without external laryngeal manipulation. (Percentage of glottic opening score, which means a better outcome at higher score: linear span from the anterior commissure to the interarytenoid notch; 0%, only interarytenoid notch seen; 100% full view of vocal cords)
Cormack-Lehane grade
Time Frame: during laryngoscopy
Cormack-Lehane grade with video/direct laryngoscope, during laryngoscopy without external laryngeal manipulation (Cormack-Lehane grade, which means a better outcome at lower score: grade 1, Full view of glottis; grade 2a, Partial view of glottis; grade 2b, Only posterior extremity of glottis or arytenoid cartilages; grade 3, Only epiglottis seen; grade 4, Neither glottis nor epiglottis seen)
Secondary Outcomes
- Cormack-Lehane grade with external laryngeal manipulation(during laryngoscopy)
- POGO score with external laryngeal manipulation(during laryngoscopy)
Investigators
Dongwook Won
Associate professor
Seoul National University Hospital