Filter-catheter and method of manufacturing same
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United States of America Patent
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-
Jun 6, 1995
Issued Date -
N/A
app pub date -
May 12, 1994
filing date -
Dec 13, 1989
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
This invention relates to a filter for the partial and at least temporary interruption of a vein, comprising a tube made of polytetrafluoroethylene presenting towards its distal end longitudinal notches distributed symmetrically over its periphery and defining flexible bands, and a conduit made of polytetrafluoroethylene inside the tube; the conduit and the tube are joined for example by thermo-welding by their distal ends. A ring made of a radio-opaque material is preferably included between the distal ends during thermo-welding. The flexible bands open out transversely by the conduit sliding in the tube. They have undergone a treatment of thermo-setting, memorizing in the polymeric structure of the tetrafluoroethylene the opened out form and/or a helical form.
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