The primary objective and endpoints of the study is compare the efficacy of two products containing heparin sodium, evaluating if the formulation produced by Eurofarma can be considered non-inferior to the reference product.

The primary objective of the study is to assess the efficacy of unfractionated heparin sodium of porcine origin (Eurofarma) in the prophylaxis of VTE relative to unfractionated heparin sodium of porcine origin from APP Pharmaceuticals. The primary endpoint will be the frequency of DVT determined by Doppler ultrasound (DUS).

Inclusion Criteria:

In order to be enrolled in this study, eligible patients must meet all criteria below:

• ICF signing;
• Aged 60 to 85 years old;
• Indication of hip orthopedic surgery due to fracture occurred within the last 5 days;
• Normal coagulation profile or with alterations up to 25% of normal values.

Exclusion Criteria:

Patients who meet any of the following criteria will not be eligible for the study:

• Previous hip surgery;
• Fracture secondary to the presence of metastasis;
• Recent traumatic brain, thoracic, or abdominal injury (up to 30 days before study start);
• Recent occurrence (up to 30 days before study start) of cerebrovascular accident;
• Serum concentration of hemoglobin below 9 g/dL;
• Prior occurrence (in the last 5 years) of confirmed or suspected thromboembolic event;
• Occurrence of major bleeding in the last 6 months (any spontaneous gastrointestinal bleeding; central nervous system bleeding; massive epistaxis, or gum bleeding; gross hematuria, or vaginal bleeding);
• Confirmed or suspected blood dyscrasia;
• Diagnosis of neoplasm other than in situ in the last 24 months or any active neoplasm (neoplasms in situ do not prevent patient from participating);
• Liver or kidney failure;
• Clinically significant gastrointestinal cardiovascular, neurological disease, or laboratory abnormalities, which at the investigator's opinion, may interfere with individual's participation in the study or with assessment of individual's response to treatment;
• Hypersensitivity to heparin;
• Previous use (15 days before study start) of oral anticoagulants or expected use during the study (see Appendix B);
• Recent participation (previous 12 months) in a clinical trial.