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| Name | Class |
|---|---|
| SMG-SNU Boramae Medical Center | OTHER |
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This study aims to compare the exposure of glottis by the use of video and direct laryngoscopy.
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.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| patient | 39 patients who are planning surgeries that require general anesthesia and tracheal intubation |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Video laryngoscopic view | Device | The glottic view on the screen of the video laryngoscope during laryngoscopy with a C-MAC video laryngoscope, which installed with Macintosh blade. |
| Measure | Description | Time Frame |
|---|---|---|
| POGO (Percentage of Glottic Opening) score | 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) | during laryngoscopy |
| Cormack-Lehane grade | 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) | during laryngoscopy |
| Measure | Description | Time Frame |
|---|---|---|
| POGO score with external laryngeal manipulation | 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) | during laryngoscopy |
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Inclusion Criteria:
Exclusion Criteria:
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Patients who have airways with various degrees of difficulty will be candidates for this observational study.
| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Dongwook Won | Contact | +82-2-870-2516 | dngwkwn@gmail.com | |
| Jung-Man Lee | Contact | +82-2-870-2513 | jungman007@gmail.com |
| Name | Affiliation | Role |
|---|---|---|
| Dongwook Won | SMG-SNU Boramae Medical Center | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| SMG-SNU | Recruiting | Seoul | 07061 | South Korea |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 29576112 | Background | Arulkumaran N, Lowe J, Ions R, Mendoza M, Bennett V, Dunser MW. Videolaryngoscopy versus direct laryngoscopy for emergency orotracheal intubation outside the operating room: a systematic review and meta-analysis. Br J Anaesth. 2018 Apr;120(4):712-724. doi: 10.1016/j.bja.2017.12.041. Epub 2018 Feb 26. | |
| 16905081 | Background |
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| Direct laryngoscopic view | Device | The glottic view evaluated by the anesthesiologist who performing tracheal intubation, by direct laryngoscopy with C-MAC installed with Macintosh blade. |
|
| Cormack-Lehane grade with external laryngeal manipulation | 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) | during laryngoscopy |
| Kaplan MB, Hagberg CA, Ward DS, Brambrink A, Chhibber AK, Heidegger T, Lozada L, Ovassapian A, Parsons D, Ramsay J, Wilhelm W, Zwissler B, Gerig HJ, Hofstetter C, Karan S, Kreisler N, Pousman RM, Thierbach A, Wrobel M, Berci G. Comparison of direct and video-assisted views of the larynx during routine intubation. J Clin Anesth. 2006 Aug;18(5):357-62. doi: 10.1016/j.jclinane.2006.01.002. |
| 9754506 | Background | Levitan RM, Ochroch EA, Kush S, Shofer FS, Hollander JE. Assessment of airway visualization: validation of the percentage of glottic opening (POGO) scale. Acad Emerg Med. 1998 Sep;5(9):919-23. doi: 10.1111/j.1553-2712.1998.tb02823.x. |
| 6507827 | Background | Cormack RS, Lehane J. Difficult tracheal intubation in obstetrics. Anaesthesia. 1984 Nov;39(11):1105-11. |