Upper Airway Ultrasound in the Assessment of Difficult Visualization of the Larynx

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

111 participants

Study Classification

INTERVENTIONAL

Study Start Date

2020-02-20

Study Completion Date

2021-07-30

Brief Summary

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failed and Difficult tracheal intubation after direct laryngoscopy is a dreaded complication of general anesthesia as it is associated with serious morbidity and mortality. There are several conventional clinical airway assessment parameters such as the modified Mallampati classification,thyromental and hyomental distance, interincisor distance, neck movementsand neck circumference, which are usually used to predict a difficult airwayand are components of multivariate risk indices. Despite the use of these parameters, the diagnostic accuracy of a preanesthetic airway assessment in predicting difficult intubation is very low. Ultrasound has been evolving as a useful device for airway assessment,and sublingual ultrasound has been used for this purpose.

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Detailed Description

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By an anesthesiologist who is experienced in airway ultrasound, patients will preoperative sonographic assessment . the patient will lie in the ramped up position , with head in the neutral position.The linear probe of the ultrasound machine will be used. Under the patient's chin, The probe of ultrasond will be placed , at different levels, to get the of the submandibular area in transverse view and the upper part of the neck. The transverse view will be used for measuring the the skin to hyoid, tongue volume,and the skin to epiglottis distance. The mid-sagittal view will be used for measuring the distance between epiglottis ,pre-epiglottic space , vocal cords, and the neck fat volume .

Conditions

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Airway Assessment

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Primary Study Purpose

DIAGNOSTIC

Blinding Strategy

NONE

Study Groups

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preoperative sonographic assessment group

preoperative sonographic assessment to airway

Group Type OTHER

sonographic assessment

Intervention Type RADIATION

preoperative sonographic assessment to airway

Interventions

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sonographic assessment

preoperative sonographic assessment to airway

Intervention Type RADIATION

Eligibility Criteria

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Inclusion Criteria

1. Adult patients above 18 years of age.
2. Both genders
3. Patients scheduled for elective surgery under general anesthesia
4. Obese patients with BMI \> 30 kg/m2

Exclusion Criteria

1. Patients with psychological disorders or those lacking co-operation.
2. Patients with maxillofacial anomalies, restricted neck movements and limited mouth opening.
3. American Society of Anesthesiologists (ASA) physical status class IV
4. Emergency operations

Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes