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CTRI Number  CTRI/2025/07/090562 [Registered on: 09/07/2025] Trial Registered Prospectively
Last Modified On: 04/07/2025
Post Graduate Thesis  Yes 
Type of Trial  Observational 
Type of Study   Cross Sectional Study 
Study Design  Single Arm Study 
Public Title of Study   Predicting difficult airway using ultrasound and clinical airway assessment parameters. 
Scientific Title of Study   Evaluation of predictive ability of sonography based airway assessment parameters and clinical parameters as predictors of difficult laryngoscopy and intubation: An Observational Clinical Study 
Trial Acronym  NIL 
Secondary IDs if Any  
Secondary ID  Identifier 
NIL  NIL 
 
Details of Principal Investigator or overall Trial Coordinator (multi-center study)  
Name  Dr Vishakha Sinsinwal 
Designation  Second Year Anaesthesia Resident 
Affiliation  Sir Sayaji Rao Gaekward Hospital 
Address  SIR SAYAJI RAO GAEKWARD HOSPITAL, ANANDPURA, VADODARA, GUJARAT

Vadodara
GUJARAT
390001
India 
Phone  9974314808  
Fax    
Email  vishakhasinsinwal11@gmail.com  
 
Details of Contact Person
Scientific Query
 
Name  Dr Kavita Lalchandani 
Designation  Professor 
Affiliation  Sir Sayaji Rao Gaekward Hospital 
Address  SIR SAYAJI RAO GAEKWARD HOSPITAL, ANANDPURA, VADODARA, GUJARAT

Vadodara
GUJARAT
390001
India 
Phone  9274586809  
Fax    
Email  lalchandanikavita@yahoo.in  
 
Details of Contact Person
Public Query
 
Name  Dr Vishakha Sinsinwal 
Designation  Second Year Anaesthesia Resident 
Affiliation  Sir Sayaji Rao Gaekward Hospital 
Address  SIR SAYAJI RAO GAEKWARD HOSPITAL, ANANDPURA, VADODARA, GUJARAT

Vadodara
GUJARAT
390001
India 
Phone  9974314808  
Fax    
Email  vishakhasinsinwal11@gmail.com  
 
Source of Monetary or Material Support  
Department of Anaethesiology, SSG Hospital, Vadodara, Gujarat, India 
 
Primary Sponsor  
Name  Sir Sayaji Rao Gaekward Hospital 
Address  SIR SAYAJI RAO GAEKWARD HOSPITAL, ANANDPURA, VADODARA, GUJARAT - 390001 
Type of Sponsor  Government medical college 
 
Details of Secondary Sponsor  
Name  Address 
NIL  NIL 
 
Countries of Recruitment     India  
Sites of Study  
No of Sites = 1  
Name of Principal Investigator  Name of Site  Site Address  Phone/Fax/Email 
Dr Vishakha Sinsinwal  SSG Hospital  C - Operation Theatre, Department of General Surgery, 2nd floor, New Surgical Block, SSG Hospital, Anandpura, Vadodara - 390001
Vadodara
GUJARAT 
9974314808

vishakhasinsinwal11@gmail.com 
 
Details of Ethics Committee  
No of Ethics Committees= 1  
Name of Committee  Approval Status 
Institutional Ethics Committee for Biomedical and Health Research (IECBHR), VADODARA  Approved 
 
Regulatory Clearance Status from DCGI  
Status 
Not Applicable 
 
Health Condition / Problems Studied  
Health Type  Condition 
Patients  (1) ICD-10 Condition: O||Medical and Surgical,  
 
Intervention / Comparator Agent  
Type  Name  Details 
 
Inclusion Criteria  
Age From  18.00 Year(s)
Age To  60.00 Year(s)
Gender  Both 
Details  1.Patients willing and giving consent for the procedure.
2.Patients posted for Elective Surgeries under Department of General Surgery SSG Hospital requiring Endotracheal Tube pacement.
3.Patients conformed to American Society of Anaesthesiologist (ASA) physical status Grade I, II, III in preoperative assessment. 
 
ExclusionCriteria 
Details  1.Patients with past history of difficult laryngoscopy or difficult intubation.
2.Pregnant women.
3.Obese patients with Basal Metabolic Index of 40 or higher.
4.Patients with noticeable swelling in the neck region.
5.Patients with maxillofacial anomalies.
6.Patients with history of burns and neck skin contracture. 
 
Method of Generating Random Sequence   Not Applicable 
Method of Concealment   Not Applicable 
Blinding/Masking   Not Applicable 
Primary Outcome  
Outcome  TimePoints 
The primary outcome of this study is to determine the predictive ability of sonography-based airway assessment parameters as predictors of difficult laryngoscopy and intubation using POGO score (percentage of glottic opening) and intubation difficulty scale (IDS)   Till 4 weeks 
 
Secondary Outcome  
Outcome  TimePoints 
The secondary outcome is to determine the predictive ability of clinical airway predictors & to evaluate the efficacy in terms of specificity & sensitivity of clinical & sonographic airway parameters for predicting difficult laryngoscopy & difficult intubation.  Till 4 weeks 
 
Target Sample Size   Total Sample Size="54"
Sample Size from India="54" 
Final Enrollment numbers achieved (Total)= "Applicable only for Completed/Terminated trials"
Final Enrollment numbers achieved (India)="Applicable only for Completed/Terminated trials" 
Phase of Trial   N/A 
Date of First Enrollment (India)   20/07/2025 
Date of Study Completion (India) Applicable only for Completed/Terminated trials 
Date of First Enrollment (Global)  Date Missing 
Date of Study Completion (Global) Applicable only for Completed/Terminated trials 
Estimated Duration of Trial   Years="1"
Months="0"
Days="0" 
Recruitment Status of Trial (Global)   Not Applicable 
Recruitment Status of Trial (India)  Not Yet Recruiting 
Publication Details   N/A 
Individual Participant Data (IPD) Sharing Statement

Will individual participant data (IPD) be shared publicly (including data dictionaries)?  

Response - NO
Brief Summary  
Routine preoperative airway assessment aids in the proper management of difficult airway conditions. Clinical screening tests used routinely in airway assessment lack adequate sensitivity and specificity for detecting difficult laryngoscopy. Ultrasound is a non-invasive procedure and allows real-time visualization of anatomical structures, aiding in rapid assessment. It helps gauge parameters like airway patency, identify potential obstructions, and assess the position of vocal cords. This dynamic imaging enhances decision-making during interventions such as intubation through optimal preparation involving appropriate choice of equipment before managing airway.

In this study we aim for comprehensive use of ultrasound airway parameters along with clinical airway parameters in airway management through Clinical parameters:
1.MO - Mouth opening
2.MMG - Modified Mallampati grade
3.ULBT - upper lip bite test
4.TMD - thyromental distance
5.MHD - myohyoid distance
6.NC - neck circumference

and sonography based parameters:
1.HMDN - hyomental distance neutral neck
2.HMDE - hyomental distance extended neck
3.TW - tongue width
4.TT - tongue thickness
5.SED - skin to epiglottis distance
6.SVC - skin to vocal cords distance
7.ANS TM - anterior neck soft tissue distance at level of thyrohyoid membrane
8.ANS Hyoid bone - anterior neck soft tissue distance at level of hyoid bone

and POGO score (Percentage of glottic opening) on direct laryngoscopy and IDS (Intubation Difficulty Scale) as key metrics.
 
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