a study to determine the usefulness of ultrasonography to measure neck tissue to help us predict difficulty in intubation.

Completed

• Conditions: ASA I/II

• Registration Number: CTRI/2017/09/009614
• Lead Sponsor: AIIMS Patna

Brief Summary

Unanticipated difficult intubation remains a primary concern foranesthesiologists  as failure to securethe airway can cause anesthesia-related life-threatening morbidity andmortality. Difficult laryngoscopy & intubation rate is still as high as1.5-13% instead of various screening tools. Ultrasound is a non-invasive, repeatable, portable device which providesimproved visualization of airway structure. Hence we aim to study the role ofairway ultrasound in predicting difficult laryngoscopy by measuring anteriorneck soft tissue thickness and comparing with clinical parameters &Cormack-Lehane grading. We will sonographically examine the neck of the patient preoperatively and willcorrelate it with laryngoscopic examination.

Ultrasound measurements will be performed with the patient supineand the head and neck in neutral position by the primary investigator. Thethicknesses of anterior neck soft tissue at vocal cord, thyroid isthmus, andsupra-sternal notch levels were obtained transversely across the anteriorsurface of the neck with a 13–6 MHz linear array ultrasound probe attached to aSonoSite machine (SonoSite Inc., Bothell, WA, USA). At vocal cord level (ZoneI), the minimal distance from the thyroid cartilage to skin surface & 15mmto the left & right will be measured. At thyroid isthmus level (Zone II),the distance from skin to trachea & 15mm to the left & right wasmeasured. At supra-sternal notch level (Zone III), the minimal distance from skinto trachea & 15mm to the left & right will be obtained. In theoperation theatre,  laryngoscopy will bedone and Cormack lahane grading will be noted.   The results obtained will be statisticallyanalyzed. Comparison analysis will be performed using the t-test for continuousvariables and chi-square or Fisher exact tests, as appropriate, fornon-continuous variables. Correlation analysis will be performed using thePearson test & p value<0.05 will be considered as significant.

Detailed Description

Not available

Study Timeline

• Study Completion: 2016-03-11
• Study Start: 2016-04-20
• Last Update Posted: 2017-03-09

Recruitment & Eligibility

• Status: Completed
• Sex: All
• Target Recruitment: 200

Inclusion Criteria

ASA I or II patients undergoing elective surgeries under general anaesthesia with endotracheal intubation.

Exclusion Criteria

Patients with history of airway trauma Patients with anterior neck masses/ swellings Patients with limited mouth opening/ neck extention due to various reasons.

Study & Design

• Study Type: Interventional
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
any correlation between anterior neck tissue measurement at the level of vocal cords and Cormack Lahane classification on laryngoscopy	at the time of laryngoscopy

Secondary Outcome Measures

Name	Time	Method
any correlation between anterior neck tissue maesurement at the level of suprasternal notch and cormack lahane classification on laryngoscopy.	at the time of laryngoscopy
correlation between anterior neck tissue measurement at the level of thyroid isthmus and cormack lahane classification	at the time of laryngoscopy

Trial Locations

Locations (1)

AIIMS,Patna; 🇮🇳 Patna, BIHAR, India

AIIMS,Patna

🇮🇳Patna, BIHAR, India

Dr Chandni Sinha

Principal investigator

06122451205

chandni.doc@gmail.com