Thyromental Height Test as a Predictor of Difficult Airway:

The Validity of the Thyromental Height Test as a Predictor of the Difficult Airway: A Prospective Comparative Study With Interincisor Distance, Thyromental Distance, Sternomental Distance & Modified Mallampati Test

Status

UNKNOWN

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT04264338

Enrollment

612

Registered

2020-02-11

Start date

2020-02-20

Completion date

2020-10-20

Last updated

2020-02-11

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

Conditions

Difficult Intubation

Brief summary

Anesthesia is increasingly safe. Major complications of airway management are no more common but still the most life-threatening condition amongst anesthesia practice and even medicine. Thyromental height test (TMHT) is an objective measure of the height between the anterior borders of the mentum and thyroid cartilage, measured while the patient is lying supine with the mouth closed. This study was designed to assess the validity of the TMHT as a single objective predictor for difficult laryngoscopy and to be compared to other objective measures.

Interventions

DIAGNOSTIC_TESTThyromental height test

Assessment of difficult airway

Study design

Observational model

COHORT

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

18 Years to 60 Years

Healthy volunteers

Inclusion criteria

* ASA physical status I & II * Scheduled for elective surgical procedures under general anesthesia using endotracheal with conventional laryngoscopy

Exclusion criteria

* Patients with a body mass index \>35 kg/m2. * Patients with neuromuscular disorders, craniofacial abnormalities, and abnormal dentition. * Patients with airway diseases e.g cancer larynx or tongue, uncooperative patients, those who will need awake intubation and patients who will undergo emergency operations.

Design outcomes

Primary

Measure	Time frame
validity of the TMHT in prediction of difficult airway in patients undergoing general anesthesia for elective surgeries using area under ROC curve for the TMHT.	baseline (before induction of general anesthesia)
Validity of TMHT in comparison with that of Modified Mallampati test (MMT) in prediction of difficult airway by comparing area under ROC curve for both tests.	baseline (before induction of general anesthesia)

Contacts

Primary ContactAbeer Ahmed, MD

abeer_ahmed@kasralainy.edu.eg01005244590

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 11, 2026