Intra-artery obstruction clearing apparatus and methods
First Claim
1. A combination for concentric arterial plaque removal comprising:
- a hollow catheter tube comprising a distal end and an inside diameter;
a drive cable rotatably passing through the hollow of the catheter tube, the drive cable comprising a distal end;
a rotatable cutting head of fixed dimensions for plaque removal as the head is distally advanced to increase blood flow;
the cutting head comprising a maximum diametral size greater than the inside diameter of the catheter tube a distal portion comprising a rounded leading end.
2 Assignments
0 Petitions
Accused Products
Abstract
Disposable intra-arterial augering and dottering-instruments for use in patients in clearing pathways at obstructed or nearly obstructed arterial sites are disclosed. A number of augering tips used on the instruments are disclosed along with a method for releasibly affixing augering tips to the instruments. In addition, a dottering tip is disclosed for use in procedures where it is desired to open a pathway without excising material from the obstructed site. A combined augering and dottering tip is disclosed for a procedure in which material displacement followed by excising of material from within an artery is accomplished without removal of the combined augering and dottering tip until the procedure is complete.
464 Citations
18 Claims
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1. A combination for concentric arterial plaque removal comprising:
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a hollow catheter tube comprising a distal end and an inside diameter; a drive cable rotatably passing through the hollow of the catheter tube, the drive cable comprising a distal end; a rotatable cutting head of fixed dimensions for plaque removal as the head is distally advanced to increase blood flow; the cutting head comprising a maximum diametral size greater than the inside diameter of the catheter tube a distal portion comprising a rounded leading end. - View Dependent Claims (2)
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3. A combination for cutting arterial plaque comprising:
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a hollow catheter tube comprising a distal end and an inside radius; a drive cable rotatably passing through the hollow of the catheter tube, the drive cable comprising a distal end; a plaque-cutting head comprising a dimensionally fixed plaque cutter comprising at least one cutting edge which comprises a radial dimension greater than the inside radius of the catheter tube. - View Dependent Claims (4)
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5. A combination for displacing arterial plaque comprising:
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a hollow catheter tube comprising a distal end and an inside diameter; a cable rotatably passing through the hollow of the catheter tube, the cable comprising a distal end; a lumen-enlarging dimensionally invariable cutting head carried beyond the distal end of the catheter tube and comprising a distally-directed cutter comprising a concave distal end; the distal end of the cable being non-rotatably connected to the head; whereby rotation of the cable rotates the head.
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6. A combination for displacing arterial plaque comprising:
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a hollow catheter tube comprising a distal end; a cable rotatably passing through the hollow of the catheter tube, the cable comprising a distal end; a lumen-enlarging cutting head carried beyond the distal end of the catheter tube and comprising a distal bulbous-shaped cutter comprising a concave leading portion. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A combination for displacing arterial plaque comprising:
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a hollow catheter tube comprising a distal end; a cable rotatably passing through the hollow of the catheter tube, the cable comprising a distal end; a lumen-enlarging hollow cutting head carried beyond the distal end of the catheter tube and comprising a bulbous shape; at least one apertured cutting site at bulbous cutting head at which plaque is both cut and displaced into the hollow of the cutting head.
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18. A dottering tip which is used in conjunction with a catheter and a rotary drive cable to clear a pathway in an artery to completely obstructed artery initially impassable by other atherectomy devices, said dottering tip comprising:
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a connector for connecting the tip to the drive cable; a lobe-shaped distal end comprising an asymmetric distribution of weight about the longitudinal axis of the tip to enhance oscillation of the tip without electrosurgical phenomenon.
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Specification