Please select the eligibility criteria that correspond to the clinical trial below.
Title: 9-10 Days Versus Prolonged Thromboprophylaxis in Patients Without Evidence of Ultrasound Proximal Thromboembolism After Total Knee Joint Replacement: a Randomized Controlled Trial
Brief Summary: The purpose of this study is to determine whether stopping Low Molecular Weight Heparin (LMWH) thromboprophylaxis is safe after total knee joint replacement. The investigators select patients without proximal thromboembolism assessed by bilateral venous ultrasound examination 7-10 days after surgery. the investigators hypothesis is that stopping thromboprophylaxis is equally effective than prolonging thromboprophylaxis in order to prevent post-surgery complications in this population.


Options:
A: Inclusion criteria

Inclusion criteria (selected):

* Patients (18 years or older) scheduled to undergo a primary, unilateral, elective total hip replacement
* Written Informed Consent

Exclusion criteria

Exclusion criteria (selected):

* Patients with an excessive risk of bleeding, for example because of history of bleeding diathesis major surgery or trauma within the last 3 months history of haemorrhagic stroke or any of the following intracranial pathologies: bleeding, neoplasm, AV malformation or aneurysm clinically relevant bleeding or gastric / duodenal ulcer within the last 6 months treatment with anticoagulants within 7 days prior to joint replacement surgery or anticipated need during the study treatment period thrombocytopenia.
* Active malignant disease or current cytostatic treatment
* Known severe renal insufficiency
* Liver disease expected to have any potential impact on survival, or elevated AST or ALT \> 2x upper limit of normal
* Recent unstable cardiovascular disease or history of myocardial infarction within the last 3 months
* Pre-menopausal women who are pregnant or nursing, or are of child-bearing potential and are not practising or do not plan to continue practising acceptable methods of birth control
* Allergy to radio opaque contrast media or iodine, heparins (incl. heparin induced thrombocytopenia) or dabigatran
* Contraindications to enoxaparin
* Participation in a clinical trial during the last 30 days
B: Key Inclusion Criteria

* Patients undergoing elective unilateral total hip replacement or a revision of at least 1 component of a total hip replacement.
* Patients who were willing and able to undergo bilateral ascending contrast venography
* Either sex, any race, 18 years and older

Key Exclusion Criteria

* Known or suspected bleeding or coagulation disorder in the patient or his or her first-degree relative
* Known or suspected history of heparin-induced thrombocytopenia
* Known coagulopathy
* Active bleeding or at high risk for bleeding
* Brain, spinal, ophthalmologic, or major surgery or trauma within the past 90 days
* Active hepatobiliary disease
* Alcohol and/or substance abuse within the past year
* Any condition for which surgery or administration of an anticoagulant is contraindicated
* Two consecutive blood pressure readings within 15 to 30 minutes with supine systolic blood pressure \>180 mm Hg or supine diastolic blood pressure \>105 mm Hg
* Clinically significant laboratory abnormalities at the enrollment visit:
* Hemoglobin \<10 g/dL
* Platelet count \<100,000/mm\^3
* Creatinine clearance \<30 mL/min, as estimated by the method of Cockcroft and Gault
* Alanine aminotransferase or aspartate aminotransferase \>2\*upper limit of normal or a total bilirubin ≥ 1.5\*1 (unless an alternative causative factor such as Gilbert's syndrome was identified)
* Need for ongoing treatment with a parenteral or oral anticoagulant (eg, subjects with mechanical valves, warfarin eligible atrial fibrillation)
* Current use of dextrans or fibrinolytics
* Treatment with medications affecting coagulation or platelet function
C: Inclusion Criteria:

* Signed informed consent,
* Female or male aged 18 years and over
* Patient scheduled for primary elective hip replacement or patient requiring surgery for hip fracture.

Exclusion Criteria:

* History of heparin-induced thrombocytopenia
* Conditions associated with increased risk of bleeding, renal impairment, known active liver disease or liver insufficiency.
* Myocardial infarction, Ischemic stroke or Transient Ischemic Attack (TIA), systemic embolism or venous thrombo-embolism within 30 days of enrollment.
D: Inclusion Criteria:

* First total knee joint replacement
* Signed informed consent

Non-inclusion Criteria:

* History of venous thromboembolism/major bleeding/Heparin induced thrombopenia
* Active cancer
* Long-term anticoagulation

Answer: D