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CTRI Number  CTRI/2025/10/095658 [Registered on: 06/10/2025] Trial Registered Prospectively
Last Modified On: 04/10/2025
Post Graduate Thesis  Yes 
Type of Trial  Observational 
Type of Study   Cross Sectional Study 
Study Design  Other 
Public Title of Study   A study comparing ketamine and tramadol medicines to prevent shivering after spinal anaesthesia 
Scientific Title of Study   Comparative study of intravenous tramadol versus ketamine on shivering among patients undergoing spinal anesthesia 
Trial Acronym  NIL 
Secondary IDs if Any  
Secondary ID  Identifier 
NIL  NIL 
 
Details of Principal Investigator or overall Trial Coordinator (multi-center study)  
Name  DIVYA MARIA MATHEW 
Designation  JUNIOR RESIDENT 
Affiliation  Kasturba Medical College, Manipal 
Address  Department of Anaesthesiology Kasturba Medical College Manipal,Udupi

Dakshina Kannada
KARNATAKA
576104
India 
Phone  9447878438  
Fax    
Email  divya.maria97@gmail.com  
 
Details of Contact Person
Scientific Query
 
Name  Dr Arun Kumar H D 
Designation  Additional Professor  
Affiliation  Kasturba Medical College, Manipal 
Address  Department of Anaesthesiology Kasturba Medical College Manipal,Udupi

Dakshina Kannada
KARNATAKA
576104
India 
Phone  9008415858  
Fax    
Email  arunhd2000@yahoo.com  
 
Details of Contact Person
Public Query
 
Name  Dr Arun Kumar H D 
Designation  Additional Professor  
Affiliation  Kasturba Medical College, Manipal 
Address  Department of Anaesthesiology Kasturba Medical College Manipal,Udupi

Dakshina Kannada
KARNATAKA
576104
India 
Phone  9008415858  
Fax    
Email  arunhd2000@yahoo.com  
 
Source of Monetary or Material Support  
Kasturba Medical College, Manipal 
 
Primary Sponsor  
Name  Kasturba Medical College, Manipal 
Address  Department of Anaesthesiology, Kasturba Medical college Manipal, Udupi, Karnataka 
Type of Sponsor  Private 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 
Dr Arun Kumar H D  Kasturba Hospital and Kasturba Medical College Manipal  Department of Anaesthesiology Kasturba Medical College Manipal Udupi Karnataka
Dakshina Kannada
KARNATAKA 
9008415858

arunhd2000@yahoo.com 
 
Details of Ethics Committee  
No of Ethics Committees= 1  
Name of Committee  Approval Status 
Kasturba Medical College and Kasturba Hospital Institutional Ethics Committee 2 (Student Research)  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  Nil  Nil 
 
Inclusion Criteria  
Age From  20.00 Year(s)
Age To  60.00 Year(s)
Gender  Both 
Details  Adult patients aged 20 to 60 years scheduled for elective surgery under subarachnoid block, American Society of Anesthesiologists Physical Status 1 or 2, Willingness to provide informed consent for participation in the study
 
 
ExclusionCriteria 
Details  Known allergy or hypersensitivity to ketamine or tramadol, Absolute contraindication for subarachnoid blockade, Patient with baseline core temperature greater than 37.5°C or less than 35.5°C, Patient denial, patient with any psychological condition 
 
Method of Generating Random Sequence   Not Applicable 
Method of Concealment   Not Applicable 
Blinding/Masking   Not Applicable 
Primary Outcome  
Outcome  TimePoints 
Shivering incidence and Shivering score  As primary outcome patient shivering score will be measured throughout the surgery at 10min interval until end of the surgery  
 
Secondary Outcome  
Outcome  TimePoints 
Sedation Score , incidence of any adverse events like nausea and vomiting , hemodynamic changes like blood pressure, heart rate and SPO2  Sedation score and adverse events will be measured throughout the surgery at 10min interval until end of the surgery. Hemodynamics, baseline values will be noted first followed by every 5 mins for the first 30 mins post spinal anesthesia and every 15 minutes until end of the surgery 
 
Target Sample Size   Total Sample Size="130"
Sample Size from India="130" 
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)   15/10/2025 
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="2"
Days="3" 
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   Shivering is a common and distressing complication following spinal anaesthesia with an incidence ranging from 40 to 60 percent. It causes patient discomfort and can lead to increased oxygen consumption interference with monitoring and hemodynamic instability. In routine anesthetic practice various pharmacological agents are already used for prevention of post spinal shivering most commonly ketamine and tramadol. However previous studies have shown inconsistent results regarding their comparative effectiveness and side effect profiles. This prospective observational study will compare patients who receive prophylactic low dose ketamine prophylactic tramadol or no prophylactic medication which is also a standard practice followed by some anesthesiologist. Since these drugs are already administered in routine care at our hospital the study will only involve systematic observation and documentation of their effects without altering patient management. The primary objective is to compare the incidence and severity of shivering after spinal anesthesia across the three groups. Secondary objectives include assessment of intraoperative hemodynamic changes and other adverse effects associated with ketamine and tramadol 
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