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CTRI Number  CTRI/2024/10/075624 [Registered on: 22/10/2024] Trial Registered Prospectively
Last Modified On: 09/10/2024
Post Graduate Thesis  No 
Type of Trial  Observational 
Type of Study   Cross Sectional Study 
Study Design  Other 
Public Title of Study   Use of ultrasonography to predict difficult airway by using airway parameters measurement  
Scientific Title of Study   Ultrasonographic measurement of three domain of airway to predict difficult laryngoscopy 
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 SUSHMA H 
Designation  SENIOR RESIDENT 
Affiliation  KASTURBA MEDICAL COLLEGE,MANIPAL 
Address  OR Office,Department of Anesthesiology ,1st floor, Kasturba Hospital, Manipal

Udupi
KARNATAKA
576104
India 
Phone  9483305224  
Fax    
Email  sushmahaithal237@gmail.com  
 
Details of Contact Person
Scientific Query
 
Name  DR SUSHMA H 
Designation  SENIOR RESIDENT 
Affiliation  KASTURBA MEDICAL COLLEGE,MANIPAL 
Address  OR Office,Department of Anesthesiology ,1st floor, Kasturba Hospital, Manipal

Udupi
KARNATAKA
576104
India 
Phone  9483305224  
Fax    
Email  sushmahaithal237@gmail.com  
 
Details of Contact Person
Public Query
 
Name  DR SUSHMA H 
Designation  SENIOR RESIDENT 
Affiliation  KASTURBA MEDICAL COLLEGE,MANIPAL 
Address  OR Office, Department of Anesthesiology ,1st floor, Kasturba Hospital, Manipal

Udupi
KARNATAKA
576104
India 
Phone  9483305224  
Fax    
Email  sushmahaithal237@gmail.com  
 
Source of Monetary or Material Support  
KASTURBA MEDICAL COLLEGE MANIPAL,UDUPI DISTRICT,KARNATAKA STATE,INDIA 576104 
 
Primary Sponsor  
Name  DR SUSHMA H 
Address  C-1304,ROYAL EMBASSY,VIDYARATNA NAGAR,MANIPAL,UDUPI DISTRICT,KARNATAKA STATE,INDIA 576104 
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 Sushma H  KASTURBA MEDICAL COLLEGE,MANIPAL  OR Office,Department of Anesthesiology ,1st floor, Kasturba Hospital, Manipal,Udupi district,Karnataka state,India 576104
Udupi
KARNATAKA 
9483305224

sushmahaithal237@gmail.com 
 
Details of Ethics Committee  
No of Ethics Committees= 1  
Name of Committee  Approval Status 
KASTURBA MEDICAL COLLEGE AND KASTURBA HOSPITAL INSTITUTIONAL ETHICS COMMITTEE  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  70.00 Year(s)
Gender  Both 
Details  a.Patients scheduled for elective procedures under General anaesthesia.
b.Age 18-70years
c.American Society of Anaesthesiologists -physical status( ASA-PS) class 1 and 2 patients
 
 
ExclusionCriteria 
Details  a. Patients with facial trauma
b. Patients with facial tumors
c. Patients with cervical trauma
d. Patients with upper airway anatomical abnormality
e. Patients with history of difficult airway in previous surgery
f. Patients who are pregnant
 
 
Method of Generating Random Sequence    
Method of Concealment    
Blinding/Masking    
Primary Outcome  
Outcome  TimePoints 
Ultrasonographic measurement of paramteres of airway will be helpful in identifying difficult airway  in the preoperative period before shifting inside theatre 
 
Secondary Outcome  
Outcome  TimePoints 
The efficacy of ultrasonography in predicting difficult airway can be compared with clinical parameters to predict difficult airway.  In the preoperative period 
 
Target Sample Size   Total Sample Size="149"
Sample Size from India="149" 
Final Enrollment numbers achieved (Total)= "0"
Final Enrollment numbers achieved (India)="149" 
Phase of Trial   N/A 
Date of First Enrollment (India)   30/10/2024 
Date of Study Completion (India) 14/02/2025 
Date of First Enrollment (Global)  Date Missing 
Date of Study Completion (Global) Date Missing 
Estimated Duration of Trial   Years="1"
Months="0"
Days="0" 
Recruitment Status of Trial (Global)   Not Applicable 
Recruitment Status of Trial (India)  Completed 
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    Aim of the study is to predict difficult laryngoscopy with ultrasonography using the measurement of three domains in airway-Oral space domain (tongue thickness),Anterior neck soft tissue thickness domain (ANS-VC) and anatomic position domain (HMDR)

Inspite of multiple clinical parameters for assessment of difficult airway,incidence of unanticipated difficult laryngoscopy is (1-8%).Clinical assessment can not be done in uncooperative and unconscious patients.Hence USG airway is helpful in overcoming the above said troubles.Hence this study will be helpful in identifying difficult airway.

After obtaining clearance from the institutional ethics committee and registering in CTRI,informed consent will be taken from the patient on the day before the surgery.Patient selection will be based on the inclusion and exclusion criteria posted for elective surgery under general anaesthesia.In the preanaesthetic evaluation,airway assessment like Modified Mallampatti Classification,Thyromental distance,Sternomental distance and interincisor gap distance and neck circumference will be measured using a scale in cms.

On the day of the surgery,enrolled patients will undergo USG examination of airway using sonosite in the preoperative room by a skilled investigator.ANS-VC measurement is done by keeping a linear probe (10-13MHz frequency) in transverse plane,with the patient lying in supine position and head kept in neutral position.ANS-VC will be measured from skin to anterior commissure of true VC by keeping the probe at the level of vocal cords,depth measurement  is done in the central axis of neck in cm.HMDR mearurement is done using a curvilinear probe(4-10MHz frequency).Probe is kept in sagittal plane in suprahyoid region and HMD is calculated by measuring distance from hyoid bone and mentum in neutral position and extended position.HMDR is calculated by dividing HMD in neutral to HMD in extended position.Tongue thickness is measured by stretching the neck and placing probe under the chin in median sagittal plane using a curvilinear probe.Maximal vertical dimension from tongue to submental skin is measured.After induction of patient using standard method,grades of laryngoscopy is noted and compared that with the ultrasonographic parameters
 
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