Intravascular catheter having combined imaging abrasion head
First Claim
Patent Images
1. An intravascular catheter for removing stenotic material from a patient'"'"'s vascular system, said catheter comprising:
- an elongate catheter body having proximal and distal ends;
a housing secured to the distal end of the catheter body, said housing having an interior surface and an aperture therethrough;
a head having an abrasive surface comprising a bonded abrasive material, wherein said abrasive surface is contained substantially within the housing for abrading stenotic material that penetrates said aperture, wherein at least one of the head and the interior surface of the housing have axial channels whereby abraded stenotic material is captured within the housing and may pass distally through said channels; and
means internal the catheter for withdrawing abraded material through said channels from within the housing.
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Accused Products
Abstract
Front-end and side-on intravascular catheters are described that comprise an abrasive head contained substantially within a housing. Aspiration means and flushing means are connected to the region of grinding to remove dislodged debris. A preferred embodiment has the abrasive surface of a rotatable head comprised of diamond powder, fused silica, tungsten carbide, aluminum oxide, or boron nitride. Another preferred embodiment has an ultrasonic transducer affixed to the head to permit transluminal imaging of the site of occlusion.
561 Citations
23 Claims
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1. An intravascular catheter for removing stenotic material from a patient'"'"'s vascular system, said catheter comprising:
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an elongate catheter body having proximal and distal ends; a housing secured to the distal end of the catheter body, said housing having an interior surface and an aperture therethrough; a head having an abrasive surface comprising a bonded abrasive material, wherein said abrasive surface is contained substantially within the housing for abrading stenotic material that penetrates said aperture, wherein at least one of the head and the interior surface of the housing have axial channels whereby abraded stenotic material is captured within the housing and may pass distally through said channels; and means internal the catheter for withdrawing abraded material through said channels from within the housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An intravascular catheter for removing stenotic material from a patient'"'"'s vascular system, said catheter comprising:
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an elongate catheter body having proximal and distal ends; a housing attached to the distal end of the catheter body, said housing having an open interior and an aperture through a side thereof, said housing further having a plurality of axial channels formed in its interior surface; a rotatable member having an abrasive surface comprising a bonded abrasive material, wherein said abrasive surface is disposed substantially within the housing for abrading stenotic material that penetrates the aperture so that abraded material collects within the housing; means for rotating the rotatable member; and means within the catheter body for withdrawing abraded material through said axial channels from within the housing. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A method for removing stenotic material from a patient'"'"'s vascular system comprising the steps of:
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introducing a catheter having proximal and distal ends into the vascular system; engaging an aperture formed in the side of a housing attached to the distal end of the catheter against the stenotic material, whereby at least a portion of the stenotic material penetrates laterally into the housing through the aperture; contacting the penetrating stenotic material with an abrasive surface comprising a bonded abrasive material on a rotatable member within the housing; rotating the rotatable member, whereby the stenotic material is abraded and collected in the housing on both sides of the rotatable member; and withdrawing at least a portion of the abraded material past the rotatable member and from the housing through the catheter. - View Dependent Claims (19, 20, 21, 22, 23)
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Specification