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US 12,721,645 B2Granted
Atherectomy catheter and system
AssigneeBard Peripheral Vascular, Inc.
InventorChad Van Liere
Life of this patent
Estimating the term…
Abstract
An atherectomy catheter includes a sheath and an elongate corewire. The sheath has a side wall configured to define, in a lumen and in a distal sheath portion, an entrapment boundary region having a drilling allowance region. The elongate corewire has a distal wire portion having an outer bulge portion that is proximal to an elongate drill tip portion. The elongate corewire is located in the lumen of the sheath with the outer bulge portion of the elongate corewire slidably disposed in the drilling allowance region of the sheath, and with the elongate drill tip portion of the elongate corewire distally protruding from the distal end of the sheath.
Claims20
An atherectomy catheter, comprising:
- a sheath having a side wall configured to define a lumen, the sheath having a distal sheath portion and a distal end, the side wall configured to define in the lumen an entrapment boundary region in the distal sheath portion, the entrapment boundary region having a drilling allowance region;
- and
- an elongate corewire having a proximal wire portion and a distal wire portion, the distal wire portion having an outer bulge portion and an elongate drill tip portion, the outer bulge portion being proximal to the elongate drill tip portion;
- and
- wherein the elongate corewire is located in the lumen of the sheath with the outer bulge portion of the elongate corewire slidably disposed in the drilling allowance region of the sheath, and with the elongate drill tip portion of the elongate corewire distally protruding from the distal end of the sheath;
- and
- wherein the entrapment boundary region has a proximal interior protrusion and a distal interior protrusion, the proximal interior protrusion and the distal interior protrusion being axially spaced apart along the longitudinal axis to define the drilling allowance region between the proximal interior protrusion and the distal interior protrusion, the proximal interior protrusion and the distal interior protrusion each define an inner diameter that is less than an inner diameter of the drilling allowance region, and wherein the outer bulge portion of the elongate corewire is slidably disposed between the proximal interior protrusion and the distal interior protrusion of the sheath, the proximal interior protrusion and the distal interior protrusion limiting movement of the outer bulge portion along the longitudinal axis.
4 more elements
An atherectomy system, comprising:
- an ultrasonic energy source configured to operate in a drilling mode and a radial ablation mode;
- and
- an atherectomy catheter coupled, or configured for coupling, to the ultrasonic energy source, the ultrasonic energy source configured to effect a longitudinal motion of the atherectomy catheter in the drilling mode and to effect both longitudinal motion and transverse motion of the atherectomy catheter in the radial ablation mode, the atherectomy catheter comprising:
- a sheath having a side wall configured to define a lumen, the sheath having a distal sheath portion and a distal end, the side wall configured to define in the lumen an entrapment boundary region in the distal sheath portion, the entrapment boundary region having a drilling allowance region;
- and
- an elongate corewire having a proximal wire portion and a distal wire portion, the distal wire portion having an outer bulge portion and an elongate drill tip portion, the outer bulge portion being proximal to the elongate drill tip portion;
- and
- wherein the elongate corewire is located in the lumen of the sheath with the outer bulge portion of the elongate corewire slidably disposed in the drilling allowance region of the sheath, and with the elongate drill tip portion of the elongate corewire distally protruding from the distal end of the sheath;
- and
- wherein the entrapment boundary region has a proximal interior protrusion and a distal interior protrusion, the proximal interior protrusion and the distal interior protrusion being axially spaced apart along the longitudinal axis to define the drilling allowance region between the proximal interior protrusion and the distal interior protrusion, the proximal interior protrusion and the distal interior protrusion each define an inner diameter that is less than an inner diameter of the drilling allowance region, and wherein the outer bulge portion of the elongate corewire is slidably disposed between the proximal interior protrusion and the distal interior protrusion of the sheath, the proximal interior protrusion and the distal interior protrusion limiting movement of the outer bulge portion along the longitudinal axis.
7 more elements
An atherectomy catheter, comprising:
- a sheath having a side wall configured to define a lumen, the sheath having a distal sheath portion and a distal end, the side wall configured to define in the lumen an entrapment boundary region in the distal sheath portion, the entrapment boundary region having a drilling allowance region;
- and
- an elongate corewire having a proximal wire portion and a distal wire portion, the distal wire portion having an outer bulge portion and an elongate drill tip portion, the outer bulge portion being proximal to the elongate drill tip portion;
- and
- wherein the elongate corewire is located in the lumen of the sheath with the outer bulge portion of the elongate corewire slidably disposed in the drilling allowance region of the sheath, and with the elongate drill tip portion of the elongate corewire distally protruding from the distal end of the sheath;
- and
- wherein the side wall of the sheath includes a slotted region proximal to the entrapment boundary region, the slotted region having an elongate slot that radially extends through the side wall of the sheath to the lumen, the elongate slot configured to receive a bend portion of the proximal wire portion of the elongate corewire.
4 more elements
Dependencies are inferred from the claim text.