Intubation, Laryngoscope, Laryngoscopy
Conditions
Keywords
Video laryngoscope, Glottis, Airway
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.
Interventions
DEVICEVideo laryngoscopic view
The glottic view on the screen of the video laryngoscope during laryngoscopy with a C-MAC video laryngoscope, which installed with Macintosh blade.
DEVICEDirect laryngoscopic view
The glottic view evaluated by the anesthesiologist who performing tracheal intubation, by direct laryngoscopy with C-MAC installed with Macintosh blade.
Sponsors
SMG-SNU Boramae Medical Center
Seoul National University Hospital
Study design
Observational model
CASE_ONLY
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
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
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| POGO (Percentage of Glottic Opening) score | 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 | 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
| Measure | Time frame | Description |
|---|---|---|
| POGO score with external laryngeal manipulation | during laryngoscopy | POGO score of the glottic view by video/direct laryngoscope during laryngoscopy with 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 with external laryngeal manipulation | during laryngoscopy | Cormack-Lehane grade with video/direct laryngoscope, during laryngoscopy with 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) |
Countries
South Korea
Contacts
Primary ContactDongwook Won
Backup ContactJung-Man Lee
Outcome results
None listed