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Comparative analysis of a preoperative airway ultrasound protocol and direct laryngoscopy in oncologic surgery patients

NCT ID NCT07813104

NEW Sponsor: Dr Abdurrahman Yurtaslan Ankara Oncology Training and Research Hospital Source: ClinicalTrials.gov ↗

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Cancelled before anyone took part.

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First seen Sep 10, 2026 · Last updated Sep 10, 2026

Summary

This prospective observational study evaluated the predictive performance of the Difficult Airway Evaluation with Sonography (DARES) protocol for identifying difficult laryngoscopy and other airway management difficulties in adult patients undergoing elective oncologic surgery. Preoperative airway ultrasonography was performed together with conventional clinical airway assessment. Ultrasound parameters included the distance from skin to epiglottis (DSE), hyomental distance (HMD) measured in different head positions, hyomental distance ratios (HMDR1 and HMDR2), and tongue thickness (TT). Conventional airway assessment parameters were also recorded. The primary objective was to evaluate the ability of ultrasound-derived airway parameters to predict difficult laryngoscopy, defined as a Cormack-Lehane grade \>2a (grades 2b, 3, or 4) during direct laryngoscopy, and to compare their predictive performance with conventional clinical airway assessment methods. Secondary objectives included evaluating the relationship between ultrasound parameters and difficult mask ventilation, assessed using the Han scale; investigating their relationship with difficulties or complications encountered during extubation; and exploring differences in airway ultrasound parameters and their predictive performance across oncologic patient subgroups.

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Study facts

What this study's own registry entry says, in plain language.

Participants

118 people

The number who actually took part.

Started

Oct 2024

Finished

Jul 2025

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Patients who underwent surgery and preoperative airway ultrasonographic imaging at Ankara Dr. Abdurrahman Yurtaslan Oncology Training and Research Hospital in 2024-2025

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: Age ≥18 years Undergoing elective oncologic surgery ASA physical status I-III No history of previous head or neck surgery No history of radiotherapy to the head or neck region Exclusion Criteria: Age \<18 years Emergency surgery ASA physical status IV Previous head or neck surgery Previous radiotherapy to the head or neck region Missing data in patient study forms Patients scheduled to undergo head and neck surgery were not excluded if they had no history of previous head or neck surgery or radiotherapy to the head and neck region.

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As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Airway management Dares protocol Difficult airway Difficult laryngoscopy Oncologic surgery

Contacts and locations

Locations

  • Ankara Dr. Abdurrahman Yurtaslan Onkoloji Eğitim ve Araştırma Hastanesi

    Ankara, 06170, Turkey (Türkiye)

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