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CTRI Number  CTRI/2025/07/091707 [Registered on: 25/07/2025] Trial Registered Prospectively
Last Modified On: 24/07/2025
Post Graduate Thesis  No 
Type of Trial  Interventional 
Type of Study   Drug 
Study Design  Randomized, Parallel Group, Active Controlled Trial 
Public Title of Study   Comparison of two doses of aspirin for preventing blood clots after hip and knee replacement surgery 
Scientific Title of Study   A Randomized Controlled Trial Comparing the Efficacy and Safety of Aspirin 75 mg vs. Aspirin 150 mg for Venous Thromboembolism (VTE) Prophylaxis in Patients Undergoing Total Hip and Knee Arthroplasty 
Trial Acronym   
Secondary IDs if Any  
Secondary ID  Identifier 
NIL  NIL 
 
Details of Principal Investigator or overall Trial Coordinator (multi-center study)  
Name  Sahil Sanghavi 
Designation  Principal Investigator, Consultant Orthopedic Surgeon 
Affiliation  Sancheti Institute for Orthopedics and Rehabilitation 
Address  Sancheti Institute for Orthopedics and Rehabilitation 11,12 Shivajinagar, Pune 411005
Sancheti Institute for Orthopedics and Rehabilitation SIOR, Main building, 1st floor, OPD 1,room no 5,6
Pune
MAHARASHTRA
411005
India 
Phone  9921522220  
Fax    
Email  sahil.sanghavi@hotmail.com  
 
Details of Contact Person
Scientific Query
 
Name  Sahil Sanghavi 
Designation  Principal Investigator, Consultant Orthopedic Surgeon 
Affiliation  Sancheti Institute for Orthopedics and Rehabilitation 
Address  Sancheti Institute for Orthopedics and Rehabilitation 11,12 Shivajinagar, Pune 411005
Sancheti Institute for Orthopedics and Rehabilitation SIOR, Main building, 1st floor OPD 1, room no 5,6
Pune
MAHARASHTRA
411005
India 
Phone  9921522220  
Fax    
Email  sahil.sanghavi@hotmail.com  
 
Details of Contact Person
Public Query
 
Name  Sahil Sanghavi 
Designation  Principal Investigator, Consultant Orthopedic Surgeon 
Affiliation  Sancheti Institute for Orthopedics and Rehabilitation 
Address  Sancheti Institute for Orthopedics and Rehabilitation 11,12 Shivajinagar, Pune 411005
Sancheti Institute for Orthopedics and Rehabilitation SIOR, Main building, 1st floor OPD 1, room no 5,6
Pune
MAHARASHTRA
411005
India 
Phone  9921522220  
Fax    
Email  sahil.sanghavi@hotmail.com  
 
Source of Monetary or Material Support  
Sancheti Institute for Orthopedics and Rehabilitation  
 
Primary Sponsor  
Name  Sancheti Institute for Orthopaedics and Rehabilitation  
Address  Sancheti Institute for Orthopaedics and Rehabilitation 11,12 Thube Park, Shivajinagar, Pune 411005 
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 sahil sanghavi  Sancheti Hospital, Pune, Maharashtra, India  11,12 Thube Park, Shivajinagar, Pune 411005, SIOR Main building 1st floor OPD 1, Room No 5,6,Hip+Knee department
Pune
MAHARASHTRA 
9921522220

sahil.sanghavi@hotmail.com 
 
Details of Ethics Committee  
No of Ethics Committees= 1  
Name of Committee  Approval Status 
Institutional Ethics Committee, Sancheti Institute for Orthopedics and Rehabilitation, shivajinagar pune.  Approved 
 
Regulatory Clearance Status from DCGI  
Status 
Not Applicable 
 
Health Condition / Problems Studied  
Health Type  Condition 
Patients  (1) ICD-10 Condition: M16||Osteoarthritis of hip, (2) ICD-10 Condition: M17||Osteoarthritis of knee,  
 
Intervention / Comparator Agent  
Type  Name  Details 
Comparator Agent  Aspirin 150 mg  Aspirin 150 mg tablet, administered orally once daily for 4 weeks postoperatively for VTE prophylaxis in patients undergoing total hip and knee arthroplasty 
Intervention  Aspirin 75 mg  Aspirin 75 mg tablet, administered orally once daily for 4 weeks postoperatively for VTE prophylaxis in patients undergoing total hip and knee arthroplasty. 
 
Inclusion Criteria  
Age From  18.00 Year(s)
Age To  90.00 Year(s)
Gender  Both 
Details  1. Adults undergoing primary total hip or knee arthroplasty
2. No prior history of DVT or VTE
3. Willing to provide written informed consent
 
 
ExclusionCriteria 
Details  1. Active bleeding disorders or peptic ulcer disease
2. History of stroke, recent myocardial infarction (MI), or severe renal or liver dysfunction
3. Patients on chronic anticoagulant therapy
4. Patients undergoing partial hip or knee replacement
 
 
Method of Generating Random Sequence   Computer generated randomization 
Method of Concealment   Not Applicable 
Blinding/Masking   Open Label 
Primary Outcome  
Outcome  TimePoints 
Incidence of symptomatic venous thromboembolism (VTE) within 90 days postoperatively   Incidence of symptomatic venous thromboembolism (VTE) within 90 days postoperatively  
 
Secondary Outcome  
Outcome  TimePoints 
1. Incidence of major, minor bleeding events  At baseline, 4 weeks, 12 weeks 
2.Rate of early periprosthetic joint infection  At baseline, 4 weeks, 12 weeks 
3. Gastrointestinal complications ,all couse mortality  At baseline, 4 weeks, 12 weeks 
 
Target Sample Size   Total Sample Size="3000"
Sample Size from India="3000" 
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)   05/08/2025 
Date of Study Completion (India) Applicable only for Completed/Terminated trials 
Date of First Enrollment (Global)  05/08/2025 
Date of Study Completion (Global) Applicable only for Completed/Terminated trials 
Estimated Duration of Trial   Years="3"
Months="0"
Days="0" 
Recruitment Status of Trial (Global)   Open to Recruitment 
Recruitment Status of Trial (India)  Open to Recruitment 
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   This is a randomized controlled trial to compare the efficacy and safety of Aspirin 75 mg versus Aspirin 150 mg for venous thromboembolism (VTE) prophylaxis in patients undergoing primary total hip and knee arthroplasty. The study aims to determine if low-dose aspirin is as effective as a higher dose in preventing VTE, while also evaluating bleeding risks and early post-operative complications. A total of 3,000 patients will be enrolled and randomized into two groups. The study is currently in the pre-recruitment phase. 
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