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CTRI Number  CTRI/2025/08/092983 [Registered on: 13/08/2025] Trial Registered Prospectively
Last Modified On: 12/08/2025
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   Comparing efficacy and safety of two drugs, tramadol and buprenorphine, given through a catheter in epidural space in lower spine for post operative pain relief. 
Scientific Title of Study   Efficacy and safety of tramadol versus buprenorphine administrated epidurally for postoperative pain relief - a prospective comparative 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  Kousika Narasimhan  
Designation  First year PG resident 
Affiliation  Apollo KH hospital  
Address  Apollo KH hospital NH 48, Chennai-Banglore highway, Melvisharam Ranipet, kanchipuram-Vellore Road, Melvisharam, Tamilnadu 632509

Vellore
TAMIL NADU
632509
India 
Phone  9952456765  
Fax    
Email  narasimhankousi17@gmail.com  
 
Details of Contact Person
Scientific Query
 
Name  Dr B Jalakandan 
Designation  Senior consultant and HOD of Anaesthesiology  
Affiliation  Department of Anesthesia, Apollo KH Hospital  
Address  Apollo KH hospital NH 48, Chennai-Banglore highway, Melvisharam Ranipet, kanchipuram-Vellore Road, Melvisharam, Tamilnadu 632509

Vellore
TAMIL NADU
632509
India 
Phone  9994976064  
Fax    
Email  dr_jalakandan@yahoo.co.in  
 
Details of Contact Person
Public Query
 
Name  Dr B Jalakandan 
Designation  Senior consultant and HOD of Anaesthesiology  
Affiliation  Department of Anesthesia, Apollo KH Hospital  
Address  Apollo KH hospital NH 48, Chennai-Banglore highway, Melvisharam Ranipet, kanchipuram-Vellore Road, Melvisharam, Tamilnadu 632509

Vellore
TAMIL NADU
632509
India 
Phone  9994976064  
Fax    
Email  dr_jalakandan@yahoo.co.in  
 
Source of Monetary or Material Support  
Apollo KH hospital NH 48, Chennai-Banglore highway, Melvisharam Ranipet, kanchipuram-Vellore Road, Melvisharam, Tamilnadu 632509 India 
 
Primary Sponsor  
Name  Apollo KH hospital  
Address  Apollo KH hospital NH 48, Chennai-Banglore highway, Melvisharam Ranipet, kanchipuram-Vellore Road, Melvisharam, Tamilnadu 632509 
Type of Sponsor  Private hospital/clinic 
 
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 B Jalakandan  Operation Theatre complex, Department of anesthesiology, Apollo KH Hospital, Melvisharam  Apollo KH hospital NH 48, Chennai-Banglore highway, Melvisharam Ranipet, kanchipuram-Vellore Road, Melvisharam, Tamilnadu 632509 India
Vellore
TAMIL NADU 
9994976064

dr_jalakandan@yahoo.co.in 
 
Details of Ethics Committee  
No of Ethics Committees= 1  
Name of Committee  Approval Status 
KHIHS Ethics Committee   Approved 
 
Regulatory Clearance Status from DCGI  
Status 
Not Applicable 
 
Health Condition / Problems Studied  
Health Type  Condition 
Patients  (1) ICD-10 Condition: M20-M25||Other joint disorders, (2) ICD-10 Condition: M175||Other unilateral secondary osteoarthritis of knee, (3) ICD-10 Condition: N83||Noninflammatory disorders of ovary, fallopian tube and broad ligament,  
 
Intervention / Comparator Agent  
Type  Name  Details 
Comparator Agent  Epidural Buprenorphine   2 mcg per kilograms of body weight in 10 ml normal saline. Used as analgesic. 
Intervention  Epidural Tramadol  1 mg per kilograms of body weight in 10 ml normal saline. Used as an analgesic. 
 
Inclusion Criteria  
Age From  18.00 Year(s)
Age To  65.00 Year(s)
Gender  Both 
Details  Patient willing to give written informed consent
American society of Anaesthesiologist class 1 and class 2
Patients undergoing elective and emergency surgeries 
 
ExclusionCriteria 
Details  Patient refusal for combined spinal epidural anaesthesia
Pregnant and lactating women
Patient with hepatic and renal dysfunction
Patients allergic to tramadol or buprenorphine
Patients with COPD
Local infection at epidural site
Vertebral anomalies
Coagulopathies
Neurological diseases
Psychiatric illness
BMI more than 35 kg/m²
 
 
Method of Generating Random Sequence   Computer generated randomization 
Method of Concealment   Alternation 
Blinding/Masking   Participant Blinded 
Primary Outcome  
Outcome  TimePoints 
Post operative pain relief in visual analouge scale  At baseline, 30 minutes, 60 minutes, 90 minutes, 120 minutes, 180 minutes, 240 minutes, 300 minutes, 360 minutes. 12 hours and 24 hours 
 
Secondary Outcome  
Outcome  TimePoints 
Onset of pain relief, time interval from administration of drug to beginning of noticeable pain relief in minutes.  Calculated from baseline in minutes. 
Duration of pain relief.
From administration of first dose of drug till requirement of second dose of drug. 
At baseline, 30 minutes, 60 minutes, 90 minutes, 120 minutes, 180 minutes, 240 minutes, 300 minutes, 360 minutes. 12 hours & 24 hours 
 
Target Sample Size   Total Sample Size="50"
Sample Size from India="50" 
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   Post Marketing Surveillance 
Date of First Enrollment (India)   01/09/2025 
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)   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   Efficacy and safety of tramadol versus buprenorphine administered epidurally for postoperative pain relief- a prospective randomized comparative study 
 METHODOLOGY:
During pre-anesthetic assessment, detailed history will be collected and the clinical
examination will be done. Relevant investigations will be obtained for each patient. The patients will
be explained about the epidural technique with catheter in situ. Patients will be explained about usage
of linear visual analogue scale for assessment of the intensity of pain. A written informed consent will
be obtained from each patient. All the patients will be kept in nil by mouth as per ASA guidelines,
prior to the surgery. All patients will be randomized into two groups, (Group T Tramadol group (n=25)
and Group B Buprenorphine group(n=25)) by lots.
All the patients in both the groups will be premedicated with Tab. Alprazolam 0.25mg per oral,
night before the scheduled day of surgery. An appropriately sized cannula will be used to secure
intravenous access. On the day of surgery, in operating room, pulse oximeter, electrocardiogram, and
non-invasive blood pressure will be connected to the patient and the baseline values will be recorded.
All the emergency drugs and airway equipment’s will be kept ready. After positioning the patient in
sitting position, under strict aseptic precautions, 18 G Tuohy epidural needle will be introduced at L1-
L2 or L2- L3 interspace and space will be confirmed using loss of resistance technique. Epidural
catheter will be inserted and fixed at the skin level as such 5cm of the catheter stays in the epidural
space. A test dose of 3ml of 2% lignocaine with adrenaline will be given to ensure that epidural catheter
is not intravascular or intrathecal.
Following epidural catheter placement, all patients will be given spinal anesthesia for the
surgical procedure one interspace below epidural puncture site using 23G or 25G Quincke spinal
needle and appropriate dose of 0.5% bupivacaine heavy will be given. Sensory and motor block levels
will be assessed
Sensory block will be assessed using pinprick test to determine the level of dermatome
blocked.
Motor block will be assessed by the Bromage scale.
Intraoperative epidural top up will be activated with local anesthetic once spinal effect
regresses two levels below the initial level.
At the end of surgery, patients will be shifted to recovery room. Upon arrival to recovery room,
pulse rate, respiratory rate, peripheral oxygen saturation, blood pressure, pain score will be assessed
and recorded.
Epidural dose of opioid will be given according to group allotted, when the patient complaints
of pain (VAS score >3)
Group T (tramadol group) will receive single dose 1mg per kg of tramadol in 10ml of normal
saline and group B (buprenorphine group) will receive single dose of 2 mcg per kg of buprenorphine
in 10ml of normal saline, via epidural catheter.
Following the first epidural opioid dose, patients will be assessed for pain intensity (VAS score)  onset,
duration of analgesia, hemodynamic parameters ( heart rate, systolic blood pressure, diastolic blood pressure, percentage saturation of oxygen,  respiratory rate) , adverse effects such as nausea, vomiting,  pruritus,  urinary retention at intervals of 0 mins, 30 mins,
1st hour, 1hour 30mins, 2nd hour, 3rd hour, 4th hour, 5th hour, 6th hour, 12th hour and 24th hour.

Duration of analgesia is assessed from the administration of first dose of drug till requirement of second dose of drug. Then study is abandoned
 
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