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CTRI Number  CTRI/2025/08/092497 [Registered on: 06/08/2025] Trial Registered Prospectively
Last Modified On: 05/08/2025
Post Graduate Thesis  No 
Type of Trial  Interventional 
Type of Study   Drug
Surgical/Anesthesia 
Study Design  Randomized, Parallel Group Trial 
Public Title of Study   A study to compare the post operative pain relief in patients undergoing gall bladder surgery, provided by injecting local anaesthetic drugs at two different sites. 
Scientific Title of Study   Comparison of analgesic efficacy of ultrasound guided external oblique intercostal plane block and subcostal transverse abdominis plane block in patients undergoing laparoscopic cholecystectomy – A double blinded randomised interventional 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  Aswini L 
Designation  Associate Professor 
Affiliation  Esic Medical College and Hospital 
Address  Modulat Ot, First floor, Dept.of anaesthesiology, Esic medical college and hospital, Ashok Pillar Road, KK nagar, Chennai.

Chennai
TAMIL NADU
600078
India 
Phone  9442011352  
Fax    
Email  aswinijipmer@gmail.com  
 
Details of Contact Person
Scientific Query
 
Name  Aswini L 
Designation  Associate Professor 
Affiliation  Esic Medical College and Hospital 
Address  Modulat Ot, First floor, Dept.of anaesthesiology, Esic medical college and hospital, Ashok Pillar Road, KK nagar, Chennai.

Chennai
TAMIL NADU
600078
India 
Phone  9442011352  
Fax    
Email  aswinijipmer@gmail.com  
 
Details of Contact Person
Public Query
 
Name  Aswini L 
Designation  Associate Professor 
Affiliation  Esic Medical College and Hospital 
Address  Modulat Ot, First floor, Dept.of anaesthesiology, Esic medical college and hospital, Ashok Pillar Road, KK nagar, Chennai.

Chennai
TAMIL NADU
600078
India 
Phone  9442011352  
Fax    
Email  aswinijipmer@gmail.com  
 
Source of Monetary or Material Support  
Esic Medical College and Hospital, KK Nagar, Chennai. 
 
Primary Sponsor  
Name  nil 
Address  nil 
Type of Sponsor  Government medical college 
 
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 
Aswini L  Esic medical college and hospital, KK nagar, Chennai.  Modular Ot, First floor, Dept. of Anaesthesiology, Esic medical college and hospital,Ashok Pillar Road, KK nagar
Chennai
TAMIL NADU 
9442011352

aswinijipmer@gmail.com 
 
Details of Ethics Committee  
No of Ethics Committees= 1  
Name of Committee  Approval Status 
Institutional Ethics Committee Esic medical College and Hospital  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  External oblique intercostal plane block  Ultrasound guided bilateral external oblique intercostal block using 20 ml of 0.25% ropivacaine 
Comparator Agent  Subcostal plane block  Ultrasound guided bilateral transverse abdominis plane block using 20 ml of 0.25% ropivacaine on each side 
 
Inclusion Criteria  
Age From  18.00 Year(s)
Age To  70.00 Year(s)
Gender  Both 
Details  American Society of Association
1 and 2
Patients undergoing laparoscopic cholecystectomy 
 
ExclusionCriteria 
Details  Patients undergoing emergency surgeries,Revision or re-do surgeries, patients with
allergy to local anaesthetics, patients with coagulation disorders and patients
undergoing surgery due to infectious causes will be excluded from the study.  
 
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 analgesic efficacy of subcostal transverse abdominis plane block and
external oblique intercostal plane block in patients undergoing laparoscopic
cholecystectomy. To compare the time for the first request of rescue analgesia post operatively between
the two groups.  
To compare the time for the first request of rescue analgesia post operatively between
the two groups.  
 
Secondary Outcome  
Outcome  TimePoints 
1. Total opioid consumption between the two groups
2. Comparison of pain scores & postoperative comfort scores between the two
groups.  
1. In the first 24 hours after surgery.
2. At 0,4,8,12,24 hours 
 
Target Sample Size   Total Sample Size="38"
Sample Size from India="38" 
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)   20/08/2025 
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="0"
Months="3"
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   Laparoscopic cholecystectomy is one of the most common upper abdominal surgeries. Pain after laparoscopic cholecystectomy is a hindering factor for  early discharge of the patients. Use of opioids leads to unwanted side effects .External oblique intercostal plane block is a novel technique covering the anterior and lateral cutaneous branches of the intercostal nerves. This study is aimed to compare the post operative analgesic efficacy of two different plane blocks- subcostal transverse abdominis block and external oblique intercostal plane block. This block if successful will help in early discharge of the patients and will reduce the use of opioids. 
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