Evaluation of the Accuracy and Reliability of the Percentage of Glottic Opening Score

Current classifications of the laryngeal view during laryngoscopy are criticized for being subjective.

The modified CL classification is criticized as it does not predict difficult intubation and especially grade 2 is operator dependent and partial view is not well defined. The numerical expression of the percentage of the glottic aperture (POGO = percentile of glottic opening) is another score. In this score, A POGO score of 100% accounts for full visualization of the larynx starting from anterior commissure to the posterior cartilage, while 0% indicated a complete absence of glottic opening. Previous validation studies reported on the reliability of POGO; however, accuracy was not evaluated.

The use of a standard and effective classification method will facilitate and accelerate communication between anesthetists in difficult life-threatening situations such as difficult airway / difficult intubation / difficult ventilation and contribute to patient safety. The use of common terminology can also facilitate the evaluation of the performance of intubation tools. The aim of this study was to evaluate the accuracy and intra and inter rater reliability of the POGO score

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Key information

Conditions

Intubation Laryngeal Diseases Otorhinolaryngologic Diseases Respiratory Tract Diseases

Age range

19 year–80 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Ankara Diskapi Yildirim Beyazit Teaching and Research Hospital

Ankara, 06110, Turkey (Türkiye)

About this study

Reviewer anesthesiologist will be asked to score still images of laryngeal views, which will be obtained from patients requiring intubation for general anesthesia, after obtaining written informed consent. The images of the larynx will be captured first with the Macintosh blade and thereafter with the D blade. An expert panel will score these images with the Cormack Lehane and POGO scores. The set of images will be prepared from patients with both difficult and normal airway anatomy. Some images in the series will be repeated to assess intra rater variability. The anesthesiologist will be asked to rate 20 images both with the CL and POGO scores. The experience of the raters in airway management, their experience with videolaryngoscopy and scoring systems used currently when documenting videolaryngoscopy and demographic data will be also obtained. The POGO scores of the participants and investigators will be compared. The primary outcome measure was the reviewer's agreement with the correct POGO scores (accuracy).

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

Patients receiving general anesthesia

Exclusion criteria

Emergency surgery-

Treatment and study plan

Videolaryngoscopy

Other

Patient will be intubated by using videolaryngoscope

Primary outcomes

Percentile of glottic opening

Time frame: 2 minutes after induction of anesthesia

A percentile of glottic opening score of 100% accounts for full visualization of the larynx starting from anterior commissure to the posterior cartilage, while 0% indicated a complete absence of glottic opening.

Sponsors and collaborators

Lead sponsor

Diskapi Teaching and Research Hospital

Other

Registry information

Important dates

Study start: 2020
Primary completion: 2020
Study completion: 2020
First posted: Jan 28, 2020
Registry last updated: Mar 4, 2020

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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Completed