TMH And Ultrasound For Difficult Airway Prediction

NCT07547943 | Not Yet Recruiting

• 1 other identifier: TMH-USG-2026
• Study Type: observational
• Target: 240
• Locations: 1 country
• Sites: 1

Brief Summary

This prospective observational study aims to evaluate the predictive value of thyromental height (TMH) and ultrasonographic airway measurements in predicting difficult airway in adult patients undergoing elective surgery under general anesthesia. Preoperative airway assessment will include standard clinical evaluation, TMH measurement, and ultrasonographic measurements of anterior neck soft tissue. Perioperative airway management data, including intubation difficulty, number of attempts, and Cormack-Lehane classification, will be recorded. The relationship between preoperative measurements and difficult airway will be analyzed to determine their predictive accuracy and clinical usefulness.

Conditions

Difficult Airway; Airway Management

Keywords

Thyromental Height; Airway Ultrasound; Difficult Intubation; Cormack-Lehane

Outcome Measures

Primary Outcomes (1)

• Prediction of Difficult Intubation

  The primary outcome is the ability of thyromental height (TMH) and ultrasonographic airway measurements to predict difficult intubation. Difficult intubation will be defined as Cormack-Lehane grade ≥3, requirement of multiple intubation attempts, or use of advanced airway devices.

  During induction of anesthesia (intraoperative period)

Study Arms (1)

Airway Assessment Cohort

Adult patients undergoing elective surgery under general anesthesia will be included. All participants will undergo standard preoperative airway assessment, including thyromental height (TMH) measurement and ultrasonographic airway evaluation. Intraoperative airway management and intubation-related parameters will be recorded to assess the predictive value of TMH and ultrasound measurements for difficult airway.

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

Adult patients undergoing elective surgical procedures under general anesthesia at a tertiary care hospital will be prospectively enrolled. All participants will undergo standardized preoperative airway assessment, including thyromental height measurement and ultrasonographic airway evaluation, followed by perioperative airway management assessment.

You may qualify if:

• Adult patients aged 18 years and older Patients scheduled for elective surgery under general anesthesia Patients requiring endotracheal intubation Patients who provide written informed consent

You may not qualify if:

• Patients with known upper airway pathology (e.g., tumor, trauma, infection) Patients with previous head and neck surgery or anatomical deformity affecting airway evaluation Patients with limited mouth opening (\<3 cm) or severe cervical spine restriction Patients with contraindications to ultrasonographic examination Patients requiring rapid sequence induction or emergency surgery Patients who refuse to participate

Sponsors & Collaborators

• Bursa City Hospital: lead
• Emre ULUSOY: collaborator

Study Sites (1)

Bursa City Hospital

Bursa, Nilüfer, 16110, Turkey (Türkiye)

Location

Central Study Contacts

Serra Topal, MD

CONTACT

05068823855; dr.serra@msn.com

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER GOV
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: MD

Study Record Dates

• First Submitted: April 13, 2026
• First Posted: April 23, 2026
• Study Start (Estimated): May 15, 2026
• Primary Completion (Estimated): May 15, 2027
• Study Completion (Estimated): May 15, 2027
• Last Updated: April 23, 2026

Record last verified: 2026-03

Data Sharing

• IPD Sharing: Will not share

Locations

TU (1)