Pre-operative upper airway examination by ultrasonography and its correlation with intra-operative difficulty in voice box visualization for airway tube insertion.

Not Applicable

• Conditions: Health Condition 1: 4- Measurement and Monitoring

• Registration Number: CTRI/2021/03/032079
• Lead Sponsor: Dr Sunaina Tejpal Karna

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Results First Posted: 1900-01-01
• Last Update Posted: 24 November 2021

Recruitment & Eligibility

• Status: ot Yet Recruiting
• Sex: Not specified
• Target Recruitment: 0

Inclusion Criteria

American society of anesthesiologist grade 1, 2,3.

Exclusion Criteria

1. Gross anatomical abnormalities of upper airway

2. Airway pathologies preventing the use of clinical screening tests and/or USG of airway like - head and neck trauma/tumors/burns and scars/radiotherapy injuries, Neck abscess/hematoma, Rheumatoid arthritis, Ankylosing spondylitis.

3. Pregnancy.

4. BMI >40Kg/m2.

5. Previous history/documentation suggestive of difficult laryngoscopy / awake intubation.

6. Any modification of anesthesia protocol/cancellation of intubation for non-airway reasons.

7. Missing data on study variables.

8. Patient refusing informed consent.

Study & Design

• Study Type: Observational
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Correlation of airway measurements done by 3-point USG with difficult laryngoscopy as assessed by Cormack-Lehane(C-L) grading. <br/ ><br>C-L grade 1 and 2 easy laryngoscopy, C-L grade 3 and 4 difficult laryngoscopy. <br/ ><br>Timepoint: USG measurements are done at Baseline, 1 hour before surgery in pre-operative room. Compared with intra-operative C-L grading done during laryngoscopy in operation theater, after the induction of anaesthesia at the time of intubation.

Secondary Outcome Measures

Name	Time	Method
Compare the diagnostic profile of 3-point USG airway with commonly used clinical screening tests for predicting difficult laryngoscopy.Timepoint: USG measurements are done at baseline, 1 hour before surgery in the pre-operative room. <br/ ><br>Clinical screening tests for difficult laryngoscopy are done at baseline, 1 day before surgery in the pre-operative clinic.;Device a composite scoring system using statistically significant 3-point USG airway parameters.Timepoint: The composite scoring system will be developed during data analysis at the end of study.;Evaluate the diagnostic profile of 3-point USG airway parameters in predicting difficult laryngoscopy. <br/ ><br>3-point USG airway measured parameters like tongue thickness, the ratio of tongue thickness to the floor of mouth thickness, skin to epiglottis distance, hyomental distance can predict difficult laryngoscopy.Timepoint: USG measurements are done at baseline, 1 hour before surgery in the pre-operative room.