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CTRI Number  CTRI/2025/08/092546 [Registered on: 06/08/2025] Trial Registered Prospectively
Last Modified On: 05/08/2025
Post Graduate Thesis  Yes 
Type of Trial  Interventional 
Type of Study   Surgical/Anesthesia 
Study Design  Randomized, Parallel Group, Active Controlled Trial 
Public Title of Study   Effect of neuromuscular blockade on post operative diaphragmatic function  
Scientific Title of Study   Effect of shallow vs moderate neuromuscular blockade in major abdominal surgeries on post operative diaphragmatic function- a randomized 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  Arju Choudhary  
Designation  Junior resident (MD) 
Affiliation  AIIMS New Delhi  
Address  5011, 5th floor, Anaesthesia office, AIIMS New Delhi

New Delhi
DELHI
110029
India 
Phone  6378333477  
Fax    
Email  arjupradhansingh@gmail.com  
 
Details of Contact Person
Scientific Query
 
Name  Dr. Sulagna Bhattacharjee  
Designation  Associate Professor  
Affiliation  AIIMS New Delhi  
Address  5014, 5th floor, Anaesthesia office, AIIMS New Delhi

New Delhi
DELHI
110029
India 
Phone  9818212531  
Fax    
Email  bhattacharjee.sulagna85@gmail.com  
 
Details of Contact Person
Public Query
 
Name  Arju Choudhary  
Designation  Junior resident (MD) 
Affiliation  AIIMS New Delhi  
Address  5011, 5th floor, Anaesthesia office, AIIMS New Delhi

New Delhi
DELHI
110029
India 
Phone  6378333477  
Fax    
Email  arjupradhansingh@gmail.com  
 
Source of Monetary or Material Support  
All India Institute of Medical Sciences, New Delhi  
 
Primary Sponsor  
Name  All India Institute of Medical Sciences, New Delhi  
Address  5014,5th floor Anaesthesia office, AIIMS New Delhi  
Type of Sponsor  Research institution and hospital 
 
Details of Secondary Sponsor  
Name  Address 
NIL   
 
Countries of Recruitment     India  
Sites of Study  
No of Sites = 1  
Name of Principal Investigator  Name of Site  Site Address  Phone/Fax/Email 
Arju Choudhary   All India Institute of Medical Sciences, New Delhi   Main OT block, AIIMS New Delhi
New Delhi
DELHI 
6378333477

arjupradhansingh@gmail.com 
 
Details of Ethics Committee  
No of Ethics Committees= 1  
Name of Committee  Approval Status 
AIIMS institutional Ethics Committee   Approved 
 
Regulatory Clearance Status from DCGI  
Status 
Not Applicable 
 
Health Condition / Problems Studied  
Health Type  Condition 
Patients  (1) ICD-10 Condition: C15-C26||Malignant neoplasms of digestive organs, (2) ICD-10 Condition: K20-K31||Diseases of esophagus, stomach and duodenum, (3) ICD-10 Condition: K50-K52||Noninfective enteritis and colitis, (4) ICD-10 Condition: K80-K87||Disorders of gallbladder, biliary tract and pancreas, (5) ICD-10 Condition: K55-K64||Other diseases of intestines, (6) ICD-10 Condition: K35-K38||Diseases of appendix, (7) ICD-10 Condition: K42||Umbilical hernia, (8) ICD-10 Condition: K43||Ventral hernia, (9) ICD-10 Condition: N17-N19||Acute kidney failure and chronic kidney disease, (10) ICD-10 Condition: C64-C68||Malignant neoplasms of urinary tract, (11) ICD-10 Condition: K70-K77||Diseases of liver,  
 
Intervention / Comparator Agent  
Type  Name  Details 
Comparator Agent  Application of Moderate neuromuscular blockade in major abdominal surgeries   •Preoperative Diaphragmatic thickness fraction will be recorded • Induction dose of Atracurium will be given • moderate neuromuscular blockade will be maintained by infusion of Atracurium(0.2 mg /kg/hr)throughout the surgery • Post operative diaphragmatic thickness fraction will be recorded 
Intervention  Application of shallow neuromuscular blockade in major abdominal surgeries.  •Pre operative diaphragmatic thickness fraction will be monitored •Induction dose of Atracurium will be given •Shallow neuromuscular blockade will be maintained by infusion of Atracurium(0.1mg/kg/hour )throughout the surgery • Post operative diaphragmatic thickness fraction will be recorded  
 
Inclusion Criteria  
Age From  18.00 Year(s)
Age To  75.00 Year(s)
Gender  Both 
Details  Patients undergoing major abdominal surgery with an expected duration of at least 2 hours. 
 
ExclusionCriteria 
Details   
 
Method of Generating Random Sequence    
Method of Concealment    
Blinding/Masking    
Primary Outcome  
Outcome  TimePoints 
To compare the effect of shallow vs moderate neuromuscular blockade on post operative diaphragmatic thickness fraction 60 minutes after extubation in patients undergoing major abdominal surgery with an expected duration of at least 2 hours.  To compare the effect of shallow vs moderate neuromuscular blockade on post operative diaphragmatic thickness fraction 60 minutes after extubation in patients undergoing major abdominal surgery with an expected duration of at least 2 hours. 
 
Secondary Outcome  
Outcome  TimePoints 
To assess the the effect of shallow vs moderate neuromuscular blockade on post operative lung ultrasound score & DE  60 minutes after extubation  
To assess the incidence of POPC  POD 3 
To assess patient centred outcomes like duration of ICU stay and hospital stay   Post operative Hospital stay  
 
Target Sample Size   Total Sample Size="136"
Sample Size from India="136" 
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)   16/08/2025 
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="2"
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   Neuromuscular blockade is a crucial pillar of GA. Recent evidence recommends moderate level of blockade for most surgical procedures causing patient immobility without deep muscle paralysis. The multi-centered POPULAR observational study suggests that use of neuromuscular blocking agents were associated with post operative pulmonary complications. Previous studies have compared deep vs moderate neuromuscular blockade in laparoscopic surgeries, demonstrating benefits of better operating conditions along with better post operative pain scores in deep block in long duration of surgeries. A recent prospective observational study has demonstrated that a lower diaphragmatic thickness fraction was associated with postoperative pulmonary complications. We therefore aim to assess the hypothesis that shallow neuromuscular blockade as compared to moderate blockade will improve diaphragmatic function and reduce POPC. 
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