초록 ▼

A removable or absorbable vena cava filter is introducible through a relatively small bore catheter. These filters formed of a single high-memory wire. The wire has a coiled cylindrical portion and a coiled conical portion. The wire assumes a straight configuration when in a catheter. The coils of t

A removable or absorbable vena cava filter is introducible through a relatively small bore catheter. These filters formed of a single high-memory wire. The wire has a coiled cylindrical portion and a coiled conical portion. The wire assumes a straight configuration when in a catheter. The coils of the cylindrical portion have a sufficiently large diameter contact the walls of the inferior vena cava with sufficient force to hold the coils in place against the inferior vena cava. The cylindrical portions of the wire has an anchor attached to it in a non-absorbable embodiment of the invention. The conical portion of the wire has a segment which aids in the removing of the filter from the vena cava.

대표청구항 ▼

[ What is claimed:] [1.] A non-permanent clot filter formed of a single high memory coiled wire, said coiled wire having a cylindrical segment and a conical segment, said coiled wire assuming a straight configuration when in a catheter, said coiled wire having a first end and a second end, said cyli

[ What is claimed:] [1.] A non-permanent clot filter formed of a single high memory coiled wire, said coiled wire having a cylindrical segment and a conical segment, said coiled wire assuming a straight configuration when in a catheter, said coiled wire having a first end and a second end, said cylindrical segment extending from said first end to an intermediate position and said conical segment extending from said intermediate position to said second end.