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Evaluation of the Accuracy of the POGO Score

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. Identifier: NCT03960567
Recruitment Status : Not yet recruiting
First Posted : May 23, 2019
Last Update Posted : May 23, 2019
Information provided by (Responsible Party):
DILEK YAZICIOGLU, Diskapi Teaching and Research Hospital

Brief Summary:

A classification method describing the larynx appearance during laryngoscopy accepted by all anesthetists has not been defined yet. In one study, it was shown that anesthetists mis classed the glottis image by 50%. The most commonly used classification method is the Cormack Lehane (CL) classification. This classification classifies the larynx appearance during direct laryngoscopy form 1 to 4. 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.

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.

Condition or disease Intervention/treatment
Intubation Device: Videolaryngoscopy

Detailed Description:

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. A group of independent anesthesiologist 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 outcome of interest is the correct POGO score rate of the participants.

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Study Type : Observational
Estimated Enrollment : 20 participants
Observational Model: Other
Time Perspective: Prospective
Official Title: Evaluation of the Accuracy and the Intra and Inter Rater Reliability of the POGO Score
Estimated Study Start Date : May 31, 2019
Estimated Primary Completion Date : July 25, 2019
Estimated Study Completion Date : July 25, 2019

Intervention Details:
  • Device: Videolaryngoscopy
    Patient will be intubated by using videolaryngoscope

Primary Outcome Measures :
  1. 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.

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 80 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Patients undergoing surgery and those who are intubated

Inclusion Criteria:

  • Patients receiving general anesthesia

Exclusion Criteria:

  • Emergency surgery

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT03960567

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Contact: Dilek Ünal, Assoc.Prof. 05336957855

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Dilek Ünal Active, not recruiting
Ankara, Turkey, 06300
Sponsors and Collaborators
Diskapi Teaching and Research Hospital
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Principal Investigator: Dilek Ünal, Assoc. Prof. Netherlands: Ministry of Health, Welfare and Sports

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Responsible Party: DILEK YAZICIOGLU, Assoc Prof, Diskapi Teaching and Research Hospital Identifier: NCT03960567     History of Changes
Other Study ID Numbers: POGO
First Posted: May 23, 2019    Key Record Dates
Last Update Posted: May 23, 2019
Last Verified: May 2019
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No

Keywords provided by DILEK YAZICIOGLU, Diskapi Teaching and Research Hospital:
Laryngeal view
Scoring systems