An observational study in Airway Management, sponsored by Diskapi Teaching and Research Hospital. Not yet recruiting at 2 sites in Turkey (Türkiye). Open to participants aged 18 Years to 100 Years. Per ClinicalTrials.gov, last updated 2026-08-11.
Sponsored by Diskapi Teaching and Research Hospital · Observational
Background:
Videolaryngoscopy has improved glottic visualization and facilitated tracheal intubation. However, difficulties-including failed intubation-still occur. At present, no prospectively derived classification system exists to assess the difficulty of videolaryngoscopic (VL) intubation across both normal and anticipated difficult airways. Additionally, current glottic view grading systems, designed for direct laryngoscopy, may not adequately capture the specific challenges of VL intubation.
Objectives:
This study aims to:
Background:
Videolaryngoscopy has improved glottic visualization and facilitated tracheal intubation. However, difficulties-including failed intubation-still occur. At present, no prospectively derived classification system exists to assess the difficulty of videolaryngoscopic (VL) intubation across both normal and anticipated difficult airways. Additionally, current glottic view grading systems, designed for direct laryngoscopy, may not adequately capture the specific challenges of VL intubation.
Objectives:
This study aims to:
Methods:
A prospective cohort of 4,977 patients will be enrolled. Patient and intubation related variables-including VL findings, airway features, clinical parameters, device, and procedural details-will be analyzed. Binary logistic regression will be employed to build the initial predictive model. In parallel, machine learning techniques (Random Forest, Support Vector Machine, XGBoost, LightGBM, etc.) will be applied to evaluate predictive performance. Comparative analysis will be conducted between the machine learning models and the logistic regression baseline.
Expected Impact:
The development of a robust predictive tool and an associated VL-specific glottic view score could enhance clinical decision making, particularly in identifying patients at risk of difficult or failed VL intubation. This may support early consideration of awake tracheal intubation, and use of standardized terminology and reduce complications associated with difficult airway management
Diskapi Teaching and Research Hospital is the lead sponsor of 106 studies on the registry; 13 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Adults, both with normal or predicted difficult airways, undergoing orotracheal intubation with a videolarygoscope, for a case mix of surgeries
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Failed first intubation attempt
Failed to intubate at firtst attempt
Time frame: 2 minutes after anesthesia induction
Difficult intubation
Failed to intubate at 1-2 attempts and/or intubation duration longer than 120 second
Time frame: 2 minutes after anesthesia induction
Failed intubation
Not able to intubate the patient
Time frame: 2 minutes after anesthesia induction
Intubation duration
Time elapsed from entring the blade between the teeth to detecting an entidal carbondioxide trace
Time frame: 2 minutes after anesthesia induction
Glottic view description
Vocal cords are fully visible Vocal cords are partially separately Vocal cords are not visible Cords are adducted Epiglottis is visible Epiglottis is large Epiglottis is small Epiglottis is edematous Epiglottis mass is present Arytenoids are visible Arytenoid luxation or subluxation Arytenoid edema Valecula problem (edema, Coffee grounds, etc., unable to insert a blade) Aryepiglottic plica pathology (edema, Coffee grounds scar) Laryngeal structures should be formed Glottic stenosis Laryngospasm
Time frame: 2 minutes after anesthesia induction
Percentil of glottic opening score
the percentage of glottic opening seen, defined by the linear span from the anterior commissure to the inter-arytenoid notch
Time frame: 2 minutes after anesthesia induction
Cormack lehanne score
grade 1 being a full view of the glottis, grade 2 being a partial view, grade 3 being only a view of the epiglottis, and grade 4 being an absent view of the glottis and epiglottis
Time frame: 2 minutes after anesthesia induction
Plan to share: No
Start is estimated for Oct 2026; primary completion for Feb 2027, 4 months later.
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This study is not yet recruiting, as verified in Aug 2026. You cannot join it, but the record below documents what was studied.
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Diskapi Teaching and Research Hospital →