Assessment Of Difficult Airway Predictors: A Prospective Comparison Of Upper Airway Ultrasound And Conventional Anthropometric Measures

Status

Recruiting

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT07309978

Enrollment

200

Registered

2025-12-30

Start date

2025-12-25

Completion date

2027-12-25

Last updated

2026-03-10

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Difficult Airway Intubation, Prediction of Difficult Airway

Brief summary

This prospective observational study aims to evaluate whether upper airway ultrasound measurements can improve the prediction of difficult airway compared with conventional anthropometric assessments. Adult patients undergoing elective procedures requiring airway management will be included. Ultrasound parameters such as tongue thickness, anterior neck soft tissue thickness, and hyomental distance will be measured before airway intervention. Standard clinical predictors (Mallampati score, thyromental distance, neck circumference, etc.) will also be recorded. The primary objective is to determine the diagnostic accuracy of ultrasound-based measurements in predicting difficult laryngoscopy and intubation. The study seeks to provide evidence supporting the integration of upper airway ultrasound into routine pre-anesthetic airway evaluation.

Interventions

None listed

Study design

Observational model

COHORT

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

18 Years to 99 Years

Healthy volunteers

Inclusion criteria

* Adults aged 18-99 years * Patients scheduled for elective surgery under general anesthesia * ASA Physical Status I-III * Able to provide informed consent * Undergoing preoperative airway evaluation

Exclusion criteria

* \- Emergency surgery cases * Age \<18 years * ASA Physical Status IV-V * Pregnant or breastfeeding patients * Patients with limited cooperation or inability to provide consent * Known anatomical airway anomalies or previous major neck surgery

Design outcomes

Primary

Measure	Time frame	Description
Diagnostic accuracy of ultrasound airway measurements for predicting difficult mask ventilation	Preoperative assessment (within 1 hour before induction of anesthesia)	Evaluation of the sensitivity, specificity, and area under the ROC curve (AUC) of ultrasound-based airway measurements-tongue thickness, hyoid-to-skin distance, and epiglottis-to-skin distance-in predicting difficult mask ventilation. These ultrasound parameters will be compared with conventional anthropometric airway assessment tests to determine their predictive performance.

Countries

Turkey (Türkiye)

Outcome results