Thyromental Height Test (TMHT) as a Predictor of Difficult Airway in Obese Patients

Cairo University (CU)

Status: Completed

Conditions: Difficult Airway Intubation

Study type: Observational

Funder types: Other

Identifiers

NCT04212156

Ms-266-2019

Details and patient eligibility

About

Difficult airway management is a major concern for anesthetists and contributes to perioperative morbidity and mortality. The incidence of difficult intubation in the obese population with a BMI of greater than 30 has been reported to be 15.8%. Thyromental height test (TMHT) is a new bedside test for difficult airway, it is a measure of the height between the anterior borders of the mentum and thyroid cartilage. TMHT can act as a surrogate for amount of mandibular protrusion; dimensions of submandibular space; and anterior position of the larynx. It appears promising as a single anatomical measure to predict the risk of difficult laryngoscopy.

Enrollment: 105 patients

Sex: All

Ages: 18 to 60 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Patients aged between 18-60 years old, ASA physical status II& III with BMI > 30 Kg/m2 who will undergo elective surgical procedures under general anesthesia using endotracheal intubation with conventional laryngoscopy

Exclusion criteria

• Patients with neuromuscular disorders, craniofacial abnormalities, abnormal dentition, uncooperative, who need awake intubation and patients who undergoing emergency operations will be excluded

Trial design

105 participants in 1 patient group

TMH test

Description:

Patient will be asked to lay supine while the head and neck maintained in a neutral position using a pillow under the head. By using digital depth gauge, the TMH will be measured from the anterior border of the thyroid cartilage directly on the thyroid notch till the anterior border of the mentum