Sternomental Displacement Test for Predicting Difficult Airway in Obese Patients

Difficult Airway Intubation Clinical Trial

Official title:

Sternomental Displacement and Neck Circumference as Predictors of Difficult Airway in Obese Patients During General Anesthesia: a Prospective Observational Cohort Study

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT04524546
• Other study ID #: Ms-141-2020
• Status: Completed
• Start date: September 1, 2020
• Est. completion date: April 30, 2021

Study information

• Verified date: May 2021
• Source: Cairo University
• Contact: n/a
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

Difficulties airway significantly contribute to the morbidity and mortality associated with anesthesia. Identifying situations and patients at risk for airway management problems is the key to optimal care and has been the focus of numerous publications. Although controversial, Body Mass Index (BMI) is considered as associated with difficult intubation in both and operating theaters. A modified measurement of SMD is obtained with the head in neutral position (SMD neutral), then the difference between SMD extension and SMD neutral was calculated and it was referred to as sternomental displacement (SMDD). SMDD was proved to be a good objective predictor for difficult laryngoscopy in adult patients, and its predictive ability was increased when combined with other tests as neck circumference (NC). To the best of our knowledge, the validity of the SMDD test was not previously assessed in obese patients.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 135
• Est. completion date: April 30, 2021
• Est. primary completion date: February 20, 2021
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years to 60 Years

Eligibility

Inclusion Criteria:

• Patients of either sex, aged between 18-60 years old, ASA physical status II & III with BMI > 30 Kg/m2 undergoing elective surgical procedures under general anesthesia using endotracheal intubation by conventional laryngoscopy.

Exclusion Criteria:

• neuromuscular disorders, craniofacial abnormalities, abnormal dentition, lesions or scares in head and neck limiting the neck mobility, uncooperative, who needed awake intubation and patients who underwent emergency operations

Related Conditions & MeSH terms

• Difficult Airway Intubation

Intervention

Diagnostic Test:
• Sterno-mental displacement test
While the patient is in sitting position, (SMD neutral) will be is measured using tape as the distance between upper borders of the manubrium sterni to the mentum with the head in a neutral position. The (SMD extension) will be then measured in the same way with the head extended on the neck. The difference between SMD extension and SMD neutral will be then calculated as sternomental displacement (SMDD).

Locations

Country	Name	City	State
Egypt	Anesthesia department - Faculty of medicine- Cairo University	Cairo

Sponsors (1)

Lead Sponsor	Collaborator
Cairo University

Country where clinical trial is conducted

Egypt, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	A a cut-off value, sensitivity (Sn), specificity (Sp), positive predictive values (PPV), negative predictive values (NPV) of sternomental displacement in predicting difficult laryngoscopy in obese patient undergoing GA.		before induction of general anesthesia