A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
A61B 17/32 (2006.01) A61B 17/22 (2006.01)
Patent
CA 2075973
IMPROVED APPARATUS AND METHOD FOR ATHERECTOMY ABSTRACT The invention provides a catheter (10) for excision of obstructive tissue from the vessel of a living body. The catheter (10) includes a cut/collect catheter (20) having a torque cable (22) whose proximal end lies outside the living body and whose distal end is coupled to the distal end of a cutting cylinder (26) that has a cutting edge (27) at the cutting cylinder (26) proximal end. The cutting edge (27) cuts tissue from the tissue wall as it is pulled back in a retrograde direction. Additionally, there is included a shielding catheter (40) which is displaceable with respect to the cut/collect catheter (20) throughout most of the length of the cut/collect catheter (20). The shielding catheter (40) has a metal cut-out cylinder attached to a plastic cylinder distal end. The cut-out cylinder has a cut-out section and a cylindrical arc portion which forms a shield to prevent cutting of an arc of a vessel wall.
Fischell David R.
Fischell Robert E.
Fischell Tim A.
Harding Richard L.
Thompson James J.
Fischell David R.
Fischell Robert E.
Fischell Tim A.
Gowling Lafleur Henderson Llp
Harding Richard L.
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