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CTRI Number  CTRI/2025/03/083698 [Registered on: 28/03/2025] Trial Registered Prospectively
Last Modified On: 15/02/2026
Post Graduate Thesis  Yes 
Type of Trial  Interventional 
Type of Study   Surgical/Anesthesia 
Study Design  Randomized, Parallel Group Trial 
Public Title of Study   A clinical trial to study the effects of two nerve blocks, external oblique intercostal plane nerve block and subcostal transversus abdominis plane nerve block for post operative pain in patients operated for laparoscopic gallbladder removal 
Scientific Title of Study   Comparison of Ultrasound guided External oblique intercostal plane block vs subcostal transversus abdominis plane block for laparoscopic cholecystectomy surgeries: a prospective randomised controlled 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 Gopinath Reddy 
Designation  Post graduate student  
Affiliation  AIIMS, Raipur 
Address  4 th floor, B block, Department of Anesthesiology and Critical care, AIIMS Raipur

Raipur
CHHATTISGARH
492099
India 
Phone  8639593015  
Fax    
Email  gnreddy0911@gmail.com  
 
Details of Contact Person
Scientific Query
 
Name  Dr Mamta Sinha 
Designation  Associate Professor  
Affiliation  AIIMS, Raipur 
Address  4 th floor, B block, Department of Anesthesiology and Critical care, AIIMS Raipur

Raipur
CHHATTISGARH
492099
India 
Phone  9818113061  
Fax    
Email  drmamta12@gmail.com  
 
Details of Contact Person
Public Query
 
Name  Dr Mamta Sinha 
Designation  Associate Professor  
Affiliation  AIIMS, Raipur 
Address  4 th floor, B block, Department of Anesthesiology and Critical care, AIIMS Raipur

Raipur
CHHATTISGARH
492099
India 
Phone  9818113061  
Fax    
Email  drmamta12@gmail.com  
 
Source of Monetary or Material Support  
Department of Anesthesiology, All India Institute of Medical Sciences, Tatibandh, Raipur- 492099 
 
Primary Sponsor  
Name  Dr Gopinath Reddy 
Address  Department of Anesthesiology, 4th floor, B block, All India Institute of Medical Sciences, Raipur 
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 Gopinath Reddy  All India Institute of Medical Sciences Raipur  Department of Anesthesiology, 4 th floor, B block, AIIMS Raipur
Raipur
CHHATTISGARH 
8639593015

gnreddy0911@gmail.com 
 
Details of Ethics Committee  
No of Ethics Committees= 1  
Name of Committee  Approval Status 
INSTITUTE ETHICS COMMITTEE  Approved 
 
Regulatory Clearance Status from DCGI  
Status 
Not Applicable 
 
Health Condition / Problems Studied  
Health Type  Condition 
Patients  (1) ICD-10 Condition: K801||Calculus of gallbladder with othercholecystitis, (2) ICD-10 Condition: O||Medical and Surgical,  
 
Intervention / Comparator Agent  
Type  Name  Details 
Intervention  External Oblique Intercostal plane block  0.25% Bupivacaine + 4mg Dexamethasone will be deposited bilaterally in the plane between External Oblique muscle and 6 & 7 ribs with associated Intercostal muscles under Ultrasound guidance 
Comparator Agent  Subcostal Transversus Abdominis Plane Block  0.25% Bupivacaine 20ml + 4mg Dexamethasone will be deposited bilaterally in between Internal Oblique muscle and Transversus Abdominis Muscle under Ultrasound Guidance 
 
Inclusion Criteria  
Age From  18.00 Year(s)
Age To  65.00 Year(s)
Gender  Both 
Details  ASA status of 1,2 and 3
BMI between 18-35 kg/m2 
 
ExclusionCriteria 
Details  Infection at the site of injection
Coagulopathy
Allergy to study drugs
Pregnant and Lactating females 
 
Method of Generating Random Sequence   Computer generated randomization 
Method of Concealment   Sequentially numbered, sealed, opaque envelopes 
Blinding/Masking   Participant Blinded 
Primary Outcome  
Outcome  TimePoints 
To record time taken for first rescue analgesic requirement  From extubation till 24 hours post operative period 
 
Secondary Outcome  
Outcome  TimePoints 
TO CALCULATE THE DOSE OF TRAMADOL AND DICLOFENAC REQUIREMENT POSTOPERATIVELY
TO ASESS POSTOPERATIVE PAIN BY VAS AT 1h,2h,3h,6h,12h,24h 
First 24 hrs AFTER SURGERY  
 
Target Sample Size   Total Sample Size="64"
Sample Size from India="64" 
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   Phase 4 
Date of First Enrollment (India)   01/04/2025 
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="6"
Days="0" 
Recruitment Status of Trial (Global)
Modification(s)  
Not Yet Recruiting 
Recruitment Status of Trial (India)  Closed to Recruitment of Participants 
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
Modification(s)  

All eligible patients will be well explained about the study protocol and interventions and allocated into two groups. Patients will be taken to the operating room, and anesthesia will be induced as per institutional protocol. After the surgery is completed, one group will be given external oblique intercostal plane block, and in the other group, subcostal transversus abdominis plane block will be given with ultrasound guidance. Then, the patient will be reversed from anesthesia and shifted to the postoperative recovery room and monitored.

Postoperative pain will be assessed with the Visual Analogue Scale for the first 24 hours. If the patient complains of pain (Visual analogue scale score more than 4), rescue analgesia (tramadol and diclofenac) will be given, and time will be noted. This data will be analyzed statistically. Finally, the primary outcome (time taken for first postoperative rescue analgesia) will be compared in both groups.

 
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