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CTRI Number  CTRI/2025/02/080825 [Registered on: 18/02/2025] Trial Registered Prospectively
Last Modified On: 02/02/2025
Post Graduate Thesis  Yes 
Type of Trial  Interventional 
Type of Study   Medical Device 
Study Design  Randomized, Parallel Group Trial 
Public Title of Study   A Study Comparing Three Methods of Providing Oxygen to Patients Under Anaesthesia When They Cannot Breathe on Their Own 
Scientific Title of Study   To compare the efficacy of apnoeic oxygenation by nasopharyngeal airway vs nasal cannula vs THRIVE during airway management under general anaesthesia :A Prospective Randomised Controlled Trial 
Trial Acronym  NIL 
Secondary IDs if Any  
Secondary ID  Identifier 
NIL  NIL 
 
Details of Principal Investigator or overall Trial Coordinator (multi-center study)  
Name  Shrutijharna Das 
Designation  Junior Resident 
Affiliation  AIIMS NEW DELHI 
Address  Department of Anaesthesiology, Pain Medicine & Critical Care. Room No-5011, 5th floor. Teaching Block, AIIMS. Ansari Nagar, New Delhi-110029.

New Delhi
DELHI
110049
India 
Phone    
Fax    
Email  shrujharna@gmail.com  
 
Details of Contact Person
Scientific Query
 
Name  Dr. Devalina Goswami 
Designation  Professor 
Affiliation  AIIMS NEW DELHI 
Address  Department of Anaesthesiology, Pain Medicine & Critical Care. Room No-5011, 5th floor. Teaching Block, AIIMS. Ansari Nagar, New Delhi-110029.

New Delhi
DELHI
110049
India 
Phone    
Fax    
Email  dr.devalina@gmail.com  
 
Details of Contact Person
Public Query
 
Name  Shrutijharna Das 
Designation  Junior Resident 
Affiliation  AIIMS NEW DELHI 
Address  Department of Anaesthesiology, Pain Medicine & Critical Care. Room No-5011, 5th floor. Teaching Block, AIIMS. Ansari Nagar, New Delhi-110029.


DELHI
110049
India 
Phone    
Fax    
Email  shrujharna@gmail.com  
 
Source of Monetary or Material Support  
All India Institute of Medical Sciences, Sri Aurobindo Marg, Ansari Nagar, Ansari Nagar East, New Delhi, Delhi, India Pincode - 110029 
 
Primary Sponsor  
Name  Shrutijharna Das 
Address  Hostel-19, AIIMS campus-1, Gautam Nagar, New Delhi 110049 India 
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 Shrutijharna Das  All India Institute of Medical Sciences  Department of Anaesthesiology, Pain Medicine and Critical Care. Room No 5011, 5th floor. Teaching Block, AIIMS. Ansari Nagar, New Delhi 110029
New Delhi
DELHI 
8250529474

shrujharna@gmail.com 
 
Details of Ethics Committee  
No of Ethics Committees= 1  
Name of Committee  Approval Status 
Institute of ethics committee for post graduate research AIIMS  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 
Intervention  Nasopharyngeal airway, nasal cannula , THRIVE  1. Nasopharyngeal airway : A device inserted into the nasal passage to maintain airflow and deliver oxygen. 2. Nasal cannula : A thin tube placed in the nostrils to provide continuous oxygen. 3. THRIVE (Transnasal Humidified Rapid-Insufflation Ventilatory Exchange) : A method using humidified, high-flow oxygen through nasal cannula to maintain oxygenation 
Comparator Agent  Nasopharyngeal airway, Nasal cannula, THRIVE  Comparison of the above three oxygen delivery methods focusing on maintaining adequate oxygen saturation during apnoeic oxygenation in patients under anaesthesia. 
 
Inclusion Criteria  
Age From  18.00 Year(s)
Age To  65.00 Year(s)
Gender  Both 
Details  1. ASA PS I and II
2. Patients with normal cardiorespiratory function
3. Patients with thyromental distance more than 6cm
4. Patients with MMPG I,II and mouth opening more than 2.5cm
5. Patients with normal mask ventilation 
 
ExclusionCriteria 
Details  Patients with
1. Anatomical abnormalities or a surgical history of the face, nose or upper airway
2. Nasal obstruction or difficult airway
3. Elevated intracranial pressure
4. Uncontrolled hypertension
5. BMI more than 30kg per m2
6. Refusal of consent 
 
Method of Generating Random Sequence   Computer generated randomization 
Method of Concealment   Sequentially numbered, sealed, opaque envelopes 
Blinding/Masking   Participant and Outcome Assessor Blinded 
Primary Outcome  
Outcome  TimePoints 
To compare the effect of apnoeic oxygenation by nasopharyngeal airway vs nasal cannula vs THRIVE in prolonging the duration of apnoea  8 minutes 
 
Secondary Outcome  
Outcome  TimePoints 
1. To assess arterial oxygen partial pressures, arterial carbon dioxide partial pressure after the induction of anaesthesia and at the end of 8 minutes or when SpO2 drops to 95% whichever occurs earlier 2. To assess SBP, DBP, MAP and HR every 30 seconds  2 years 
 
Target Sample Size   Total Sample Size="120"
Sample Size from India="120" 
Final Enrollment numbers achieved (Total)= "0"
Final Enrollment numbers achieved (India)="120" 
Phase of Trial   N/A 
Date of First Enrollment (India)   01/03/2025 
Date of Study Completion (India) Date Missing 
Date of First Enrollment (Global)  Date Missing 
Date of Study Completion (Global) Date Missing 
Estimated Duration of Trial   Years="2"
Months="0"
Days="0" 
Recruitment Status of Trial (Global)   Not Yet Recruiting 
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   Title of the study: To compare the efficacy of apnoeic oxygenation by nasopharyngeal airway vs nasal cannula vs THRIVE during airway management under general anaesthesia : A Prospective Randomised Controlled Trial
Primary Objective: To compare the efficacy of apnoeic oxygenation by nasopharyngeal airway vs nasal cannula vs THRIVE in prolonging the duration of apnoea up to a period of 8 minutes or till oxygen saturation (SpO2) is < 95% whichever is earlier
Secondary objective: 1. To assess the PaO2, PaCO2 after the induction of anesthesia and at the end of 8 minutes or when oxygen saturation falls to 95% whichever occurs earlier. 2. To assess SBP, DBP, MAP, HR every 30 seconds for 8 minutes or till SpO2 falls to 95%
Sample Size: Total 120 patients with 40 patients in each group 
Randomisation: The patients will be randomised into three groups. Randomization will be done by using Sequentially Numbered Opaque Sealed Envelope technique concealig the randomization group as determined by a computer generated random numbers table.
Methodology: 
All selected patients will undergo a routine pre anesthetic check up a day prior to surgery. Standard fasting guidelines (WHO) will be followed by all patients. In the operating room, standard monitoring will be done as per ASA recommendation. Patients will be placed in a supine position with their heads elevated approximately 15 degrees. Preoxygenation will be done with 100% oxygen for 3 minutes. General anesthesia will be administered to the patient as per the standard protocol of the institute. Once induced, according to the randomization and group assigned to the patient, the anesthetist will place a nasopharyngeal airway or nasal cannula or THRIVE on the patient.
Group P: will receive !00% oxygen @5L/min  via nasopharyngeal airway
Group C : will receive 100% oxygen@5L/min via nasal cannula 
Group H: will receive 100% oxygen @70L/min via THRIVE
SpO2 will be closely monitored. Timing will be terminated when the safe apnoea time of 8 minutes or if the SpO2 drops tp 95% at any time before 8 minutes. 
Arterial blood gas analysis will be done at two separate times
1. After the induction of anesthesia 
2. at the end of 8 minutes or when SpO2 drops to 95% whichever occurs earlier.
Maintenance and reversal of anesthesia will be as per standard protocol
Outcome parameters:
1. safe apnoea duration
2. Number of patients whose SpO2 dropped to or below 95%
3. PaO2 and PaCO2 immediately after induction of anesthesia and at the end of 8 minutes 
4. SBP, DBP, MAP and HR every 30 seconds for 8 minutes

 
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