| 摘要 |
Implantable valve for use in blood vessels, particularly veins, more particularly venous confluences comprising a first supporting element and a second operative element; said first supporting element can be in the form of a bent body or of a cut sheet; and said operative element can be joined to the first one, by known means, e.g., glueing, soldering, sewing, embedding, embodying, etc., or be integral with said first element. In the former case, the operative element can be made from a number of suitable materials, such as plastics, biological materials and of the same material as the first element; in the latter case such operative element is of the same material as the first element. A catheter-based tool for remotely removing/rescuing the eventually misplaced/mislodged valve, comprising a stiff operative probe-guide, thermally pre-shaped starting from a thermoreactive alloy wire, able to hook up the valve and to withdraw it from the body. |
