Final answer:
Vena Cava Filters are used over LMWH in DVT when anticoagulants are contraindicated, have failed, cause significant bleeding, or when surgery necessitates minimized anticoagulation.
Step-by-step explanation:
There are circumstances where the use of a Vena Cava Filter may be indicated over low molecular weight heparin (LMWH) therapy in the treatment of deep vein thrombosis (DVT) or other hypercoagulable states:
- Patients who have contraindications to anticoagulation therapy, such as those with a high risk of bleeding.
- Patients who have failed anticoagulation therapy, meaning they have developed new clots despite adequate treatment.
- Patients experiencing complications from anticoagulation therapy, like significant bleeding.
- Those who require imminent surgery where anticoagulation needs to be minimized to reduce bleeding risk during the operative period.
Vena Cava Filters are designed to prevent pulmonary embolism by catching clots that break loose from veins in the legs before they can travel to the lungs. However, their placement is typically considered when anticoagulant therapy is not possible or ineffective.