Vascular filter for controlled release
First Claim
1. A vascular filter for delivery through a catheter to a desired site in a body vessel for therapeutic treatment of a patient, comprising:
- a base member;
at least one filter element coupled to the base member, the filter element having a compressed shape and an expanded shape, and the filter element tending to resiliently expand from the compressed shape to the expanded shape,such that when the filter element is positioned at the desired site and immersed in a body fluid flowing past the desired site, the filter element is adapted to filter the body fluid; and
at least one brake coupled to the base member, wherein the brake extends radially outward in a relaxed configuration, and tends to resiliently press radially outward when in a compressed configuration.
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Accused Products
Abstract
The present invention relates to a vascular filter which can be placed inside a body cavity, such as a blood vessel. A catheter may be used to deliver the filter, and consists of a tubular basic body with a distal end, a proximal end and a lumen extending between the ends. The vascular filter may be received in a compressed state inside the catheter lumen. The catheter may include an ejection device, which can be used to eject the vascular filter from the distal end of the catheter. Some portion of the vascular filter may tend to push off in a resilient manner against the distal end of the catheter, and the filter preferably includes a brake for acting on the catheter lumen, which tends to slow and control ejection from the catheter.
412 Citations
9 Claims
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1. A vascular filter for delivery through a catheter to a desired site in a body vessel for therapeutic treatment of a patient, comprising:
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a base member; at least one filter element coupled to the base member, the filter element having a compressed shape and an expanded shape, and the filter element tending to resiliently expand from the compressed shape to the expanded shape, such that when the filter element is positioned at the desired site and immersed in a body fluid flowing past the desired site, the filter element is adapted to filter the body fluid; and at least one brake coupled to the base member, wherein the brake extends radially outward in a relaxed configuration, and tends to resiliently press radially outward when in a compressed configuration. - View Dependent Claims (2, 3, 4)
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5. A filter delivery system for delivery and deployment of a vascular filter through a catheter to a desired site in a body vessel for therapeutic treatment of a patient, comprising:
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a catheter having proximal and distal ends, the catheter defining a lumen extending between the catheter proximal and distal ends; a filter disposed within the catheter lumen in a compressed shape; and an ejection member slidably received within the catheter lumen, the ejection member being selectively actuable to push the filter out the catheter distal end into the body vessel in the region of the desired site; wherein the filter has a filter element tending to resist movement of the filter form the catheter;
in a body fluid flowing past the desired site, the filter element is adapted to filter the body fluid;and wherein the filter has at least one brake tending to resist movement of the filter from the catheter;
thereby controlling the motion of the filter during delivery to the desired site. - View Dependent Claims (6, 7, 8, 9)
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Specification