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Low profile perfusion catheter
| Details |
Inventors: Crocker, Michael;
Assignee: Cardiovascular Dynamics, Inc. (Irvine, CA)
Primary Examiner: McDermott; Corrine M.
Assistant Examiner: Gring; N. Kent
Attorney, Agent or Firm: Knobbe, Martens, Olson & Bear
Disclosed is a Low Profile Perfusion Catheter, for use in coronary angioplasty applications. Preferably, the catheter is provided with an inflatable dilatation balloon, and a perfusion lumen extending therethrough. The diameter of the perfusion lumen is enlargable from a first, reduced diameter to a second, enlarged diameter. In one embodiment, an axially movable tubular support is movable within the lumen from a proximal, insertion position to a distal perfusion position. In another embodiment, the support is radially expandable. In a further embodiment, a porus drug delivery balloon is provided. |
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DETAILED DESCRIPTION There is provided in accordance with one aspect of the present invention a balloon catheter, such as for performing balloon dilatation procedures in a body lumen.
The catheter comprises an elongate flexible tubular body, having an inflatable balloon thereon.
At least one influent port is provided on the body on a first side of the balloon, and at least one effluent port is provided on the body on a second side of the balloon.
The influent and effluent ports are in fluid communication with each other by way of a central lumen extending through the balloon.
An axially movable support is positioned within the central lumen, such that the support is movable from a first, proximal position for installation of the catheter, to a second, distal position for maintaining patency of the central lumen and permitting perfusion while the balloon is inflated.
The central lumen has a first inside diameter when the support is in the proximal position, and a second, larger inside diameter when the support is in the distal position.
Preferably, the support comprises a spring coil.
In an over the wire embodiment of the invention, the tubular body is provided with a guidewire lumen extending from a proximal guidewire access port to a distal guidewire opening an the tip of the catheter.
In another embodiment of the invention, an access port is provided on the side of the tubular body for providing access to the guidewire lumen at a point in between the inflation balloon and the proximal end of the tubular body, to produce a monorail catheter.
In accordance with another aspect of the present invention, there is provided a balloon catheter comprising an elongate flexible tubular body having an inflatable balloon thereon.
The balloon is expandable from a first, reduced diameter to a second, enlarged diameter.
A perfusion conduit extends through the inflatable balloon, and at least a portion of the perfusion conduit is expandable from a first reduced diameter to a second enlarged diameter.
Preferably, the second, enlarged diameter of the perfusion conduit is larger than the first, reduced diameter of the inflatable balloon
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