Methods and devices for cutting tissue
First Claim
1. An atherectomy catheter comprising:
- a catheter body adapted to be inserted into a blood vessel of a subject, the catheter body including a proximal body portion and a distal body portion coupled to the proximal body portion at a joint, wherein the distal body portion is deflectable about the joint relative to the proximal body portion between a non-deflected position and a deflected position, the distal body portion having a side opening window;
a cutter in the distal body portion, the cutter being rotatable relative to the catheter body about a rotation axis and adapted to debulk the blood vessel, wherein the cutter is movable axially relative to the distal body portion from a distal location distal of the side opening window to a proximal location adjacent a proximal end of the side opening window to impart deflection of the distal body portion from the non-deflected position to the deflected position, wherein the cutter protrudes outside the distal body portion through the side opening window when the distal body portion is in the deflected position; and
a drive shaft extending within the proximal body portion, the drive shaft being coupled to the cutter and adapted to impart rotation to the cutter about the rotation axis and axial movement of the cutter relative to the distal body portion from the distal location to the proximal location.
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Accused Products
Abstract
A method of removing material from a blood flow lumen generally includes providing a device having a cutting element and an opening, advancing the device through the blood flow lumen to a site where material is to be removed, forcing the opening toward a wall of the site where material is to be removed, and moving the cutting element and the opening so that material in the blood flow lumen is cut by the cutting element and directed into the opening for removal as the cutting element and opening are moved through the blood flow lumen. In some embodiments, the device may be deflected or bent to force the opening toward a wall to remove material. The cutting element may be rotatable and may have an axis that is movable, that is not parallel to the longitudinal axis of the device, or both.
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Citations
30 Claims
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1. An atherectomy catheter comprising:
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a catheter body adapted to be inserted into a blood vessel of a subject, the catheter body including a proximal body portion and a distal body portion coupled to the proximal body portion at a joint, wherein the distal body portion is deflectable about the joint relative to the proximal body portion between a non-deflected position and a deflected position, the distal body portion having a side opening window; a cutter in the distal body portion, the cutter being rotatable relative to the catheter body about a rotation axis and adapted to debulk the blood vessel, wherein the cutter is movable axially relative to the distal body portion from a distal location distal of the side opening window to a proximal location adjacent a proximal end of the side opening window to impart deflection of the distal body portion from the non-deflected position to the deflected position, wherein the cutter protrudes outside the distal body portion through the side opening window when the distal body portion is in the deflected position; and a drive shaft extending within the proximal body portion, the drive shaft being coupled to the cutter and adapted to impart rotation to the cutter about the rotation axis and axial movement of the cutter relative to the distal body portion from the distal location to the proximal location. - 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 catheter body adapted to be inserted into a blood vessel of a subject, the catheter body including a proximal body portion and a distal body portion coupled to the proximal body portion, wherein the distal body portion is deflectable relative to the proximal body portion between a non-deflected position and a deflected position, wherein the distal body portion has a longitudinal axis, the distal body portion having a side opening window; a cutter in the distal body portion, the cutter being rotatable relative to the catheter body about a rotation axis and adapted to debulk the blood vessel, wherein the cutter is movable axially relative to the distal body portion from a distal location distal of the side opening window to a proximal location adjacent a proximal end of the side opening window to impart deflection of the distal body portion from the non-deflected position to the deflected position, wherein the rotation axis of the cutter is disposed at an offset angle relative to the longitudinal axis of the distal body portion when the distal body portion is in the deflected position. - View Dependent Claims (28, 29, 30)
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Specification