Clinical trial NCT04620434: Improvement of the Glottic View by Video Laryngoscope
Official title: Improvement of the Glottic View by the Use of Video Laryngoscope
Study type: OBSERVATIONAL
Overall status: UNKNOWN
Conditions: Laryngoscope
Intubation
Laryngoscopy
Keywords: Video laryngoscope
Glottis
Airway
Lead sponsor: Seoul National University Hospital
Sponsor class: OTHER
Collaborators: name: SMG-SNU Boramae Medical Center
First posted: 2020-11-09
Enrollment: 39
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Observational model: CASE_ONLY
Time perspective: PROSPECTIVE
Sampling method: PROBABILITY_SAMPLE
Study population: Patients who have airways with various degrees of difficulty will be candidates for this observational study.

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.

Eligibility criteria: 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

Primary outcomes:
measure: POGO (Percentage of Glottic Opening) score
timeFrame: during laryngoscopy
measure: Cormack-Lehane grade
timeFrame: during laryngoscopy
Secondary outcomes:
measure: POGO score with external laryngeal manipulation
timeFrame: during laryngoscopy
measure: Cormack-Lehane grade with external laryngeal manipulation
timeFrame: during laryngoscopy
Other outcomes:
Locations:
city: Seoul
country: Korea, Republic of
facility: SMG-SNU
Study officials:
affiliation: SMG-SNU Boramae Medical Center
name: Dongwook Won
role: PRINCIPAL_INVESTIGATOR
References:
citation: 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.
citation: 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.
citation: 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.
citation: Cormack RS, Lehane J. Difficult tracheal intubation in obstetrics. Anaesthesia. 1984 Nov;39(11):1105-11.