MATERIAL REMOVAL DEVICE HAVING IMPROVED MATERIAL CAPTURE EFFICIENCY AND METHODS OF USE
First Claim
Patent Images
1. An atherectomy catheter, comprising:
- a body having an opening;
a rotatable shaft coupled to the body;
a tissue collection chamber coupled to the body and positioned distal to the cutting element;
a cutting element coupled to the rotatable shaft, the cutting element having a cutting edge; and
a lumen configured to direct fluid into the tissue collection chamber.
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Abstract
The present invention provides an improved atherectomy catheter having means for directing particles generated by a cutting element into a collection chamber. Methods of directing the cut material from a blood vessel lumen into a collection chamber are also provided.
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Citations
59 Claims
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1. An atherectomy catheter, comprising:
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a body having an opening; a rotatable shaft coupled to the body; a tissue collection chamber coupled to the body and positioned distal to the cutting element; a cutting element coupled to the rotatable shaft, the cutting element having a cutting edge; and a lumen configured to direct fluid into the tissue collection chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. An atherectomy catheter, comprising:
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a body having an opening; a rotatable shaft coupled to the body; a tissue collection chamber coupled to the body and positioned distal to the cutting element; a cutting element coupled to the rotatable shaft, the cutting element having a cutting edge; and a part for propelling fluid distally in the tissue collection chamber, the part being selected from the group consisting of;
(i) a drive shaft having a proximal end and a distal portion, the proximal end being attached to the cutting element and a propeller being attached to the distal portion; and
(ii) a paddle attached to the cutting element. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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49. A method of recirculating fluid in an atherectomy catheter comprising:
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providing an atherectomy catheter, the atherectomy catheter comprising; a body having an opening; a rotatable shaft coupled to the body; a tissue collection chamber coupled to the body and positioned distal to the cutting element, the tissue collection chamber having vent holes; a cutting element coupled to the rotatable shaft, the cutting element having a cutting edge; and moving fluid out of the tissue collection chamber through the vent holes such that a negative pressure is created inside the tissue collection chamber and this negative pressure causing fluid to enter the tissue collection chamber through the opening of the body of the catheter. - View Dependent Claims (50, 51)
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52. A method of removing material from a body lumen, the method comprising:
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providing an atherectomy catheter, the atherectomy catheter comprising; a body having an opening; a rotatable shaft coupled to the body; a tissue collection chamber coupled to the body and positioned distal to the cutting element; a cutting element coupled to the rotatable shaft, the cutting element having a cutting edge; and a lumen configured to direct fluid into the tissue collection chamber; placing the catheter in the body lumen; and moving the catheter in the body lumen to contact the cutting element with the material in the body lumen. - View Dependent Claims (53, 54, 55)
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56. A method of removing material from a body lumen, the method comprising:
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providing an atherectomy catheter, the atherectomy catheter comprising; a body having an opening; a rotatable shaft coupled to the body; a tissue collection chamber coupled to the body and positioned distal to the cutting element; a cutting element coupled to the rotatable shaft, the cutting element having a cutting edge; and a part for propelling fluid distally in the tissue collection chamber, the part being selected from the group consisting of;
(i) a drive shaft having a proximal end and a distal portion, the proximal end being attached to the cutting element and a propeller being attached to the distal portion; and
(ii) a paddle attached to the cutting element;placing the catheter in the body lumen; and moving the catheter in the body lumen to contact the cutting element with the material in the body lumen. - View Dependent Claims (57, 58, 59)
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Specification