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CTRI Number  CTRI/2025/03/082556 [Registered on: 18/03/2025] Trial Registered Prospectively
Last Modified On: 17/03/2025
Post Graduate Thesis  Yes 
Type of Trial  Observational 
Type of Study   Prospective observational comparitive study 
Study Design  Single Arm Study 
Public Title of Study   Which is better in predicting difficult intubation - acromio-axillo-suprasternal notch index or ratio of neck circumference to thyromental distance  
Scientific Title of Study   Comparison of acromio-axillo-suprasternal notch index with ratio of neck circumference to thyromental distance in predicting difficult intubation 
Trial Acronym  NIL 
Secondary IDs if Any  
Secondary ID  Identifier 
EC/NEW/INST/2022/KA/0174  Other 
 
Details of Principal Investigator or overall Trial Coordinator (multi-center study)  
Name  Nithya Ramachandran  
Designation  Junior Resident 
Affiliation  K S Hegde Medical Academy 
Address  Department of Anaesthesiology and Critical Care, K S Hegde Medical Academy,P.O. Nityanandanagar, Deralakatte, Mangaluru

Dakshina Kannada
KARNATAKA
575018
India 
Phone  8884586420  
Fax    
Email  nithya02m@gmail.com   
 
Details of Contact Person
Scientific Query
 
Name  Ananda Bangera 
Designation  Professor 
Affiliation  K S Hegde Medical Academy 
Address  Department of Anaesthesiology and Critical Care, K S Hegde Medical Academy,P.O. Nityanandanagar, Deralakatte, Mangaluru

Dakshina Kannada
KARNATAKA
575018
India 
Phone  9845278880  
Fax    
Email  anandabangera@gmail.com  
 
Details of Contact Person
Public Query
 
Name  Ananda Bangera 
Designation  Professor 
Affiliation  K S Hegde Medical Academy 
Address  Department of Anaesthesiology and Critical Care, K S Hegde Medical Academy,P.O. Nityanandanagar, Deralakatte, Mangaluru

Dakshina Kannada
KARNATAKA
575018
India 
Phone  9845278880  
Fax    
Email  anandabangera@gmail.com  
 
Source of Monetary or Material Support  
K S Hegde Medical Academy,P.O. Nityanandanagar, Deralakatte, Mangaluru, Karnataka 575018 
 
Primary Sponsor  
Name  Nithya Ramachandran  
Address  Department of Anaesthesiology and Critical Care, K S Hegde Medical Academy,P.O. Nityanandanagar, Deralakatte, Mangaluru, Karnataka 575018 
Type of Sponsor  Other [Self] 
 
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 Ananda Bangera  K S Hegde Hospital   Department of Anaesthesiology and Critical care, K S Hegde Medical Academy, Deralakatte, Mangalore
Dakshina Kannada
KARNATAKA 
9845278880

anandabangera@gmail.com 
 
Details of Ethics Committee  
No of Ethics Committees= 1  
Name of Committee  Approval Status 
IEC K S HEGDE MEDICAL ACADEMY   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 
Comparator Agent  Nil  Nil 
 
Inclusion Criteria  
Age From  18.00 Year(s)
Age To  60.00 Year(s)
Gender  Both 
Details  Patients aged 18-60 years scheduled to undergo elective surgery under general endotracheal anaesthesia
Adults belonging to ASA physical status (ASA PS)I,II & III 
 
ExclusionCriteria 
Details  Patients with obvious pathological condition in and around the mouth and neck
Restricted mouth opening
Pregnant ladies
Patients requiring rapid sequence intubation 
 
Method of Generating Random Sequence   Not Applicable 
Method of Concealment   Not Applicable 
Blinding/Masking   Not Applicable 
Primary Outcome  
Outcome  TimePoints 
predictive accuracy(sensitivity, apecificity and predictive value) of AASI and NC to TMD ration in identifying difficult intubation, validated against Cormack-Lehane grade or intubation difficulty score(IDS)   Baseline  
 
Secondary Outcome  
Outcome  TimePoints 
sensitivity, specificity, correlation with other predictive tools.  Baseline  
 
Target Sample Size   Total Sample Size="340"
Sample Size from India="340" 
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)   31/03/2025 
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="0"
Months="5"
Days="0" 
Recruitment Status of Trial (Global)   Not Yet Recruiting 
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  
Title:
Comparison of acromio-axillo-suprasternal notch index with ratio of neck circumference to thyromental distance n predicting difficult intubation
This prospective observational study aims to compare the effectiveness of the acromio-axillo-suprasternal notch index and neck circumference to thyromental distance ratio in predicting difficult intubation in adult surgical patients. Preoperative assessments will include age, sex, surgery, ASA status,  height, weight, BMI, mouth opening, mallampati class, temoromandibular joint, sternomental distance, hyomental distance, upper lip bite test, inter incisor gap, thyromental distance , neck circumference, AASI, CL grading, IDS score. The study seeks to determine the sensitivity, specificity and predictive values of these indices for identifying patients at risk of difficult intubation, providing valuable insights for improving airway management strategies. 
 
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