Thrombus filter with break-away anchor members
a filter and anchor member technology, applied in the field of filters, can solve the problems of blockage of pulmonary arteries, pulmonary embolism can be fatal, and patients are constantly at risk of a clot breaking free, and achieve the effect of reducing the cross sectional area of each strut and further reducing the cross sectional area of the stru
Inactive Publication Date: 2013-01-24
BOSTON SCI SCIMED INC
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Problems solved by technology
These patients are constantly at risk of a clot breaking free and traveling via the inferior vena cava to the heart and lungs.
Pulmonary embolization can frequently be fatal, for example when a large blood clot interferes with the life-sustaining pumping action of the heart.
If a blood clot passes through the heart it will be pumped into the lungs and may cause a blockage in the pulmonary arteries.
A blockage of this type in the lungs will interfere with the oxygenation of the blood causing shock or death.
Because the portions of the filter contacting the blood vessel wall become fixed in this way, it is impractical to remove many prior art filters percutaneously after they have been in place for more than two weeks.
A loose thrombus filter is undesirable because it may migrate to a dangerous or life threatening position.
Method used
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[0025]The following detailed description should be read with reference to the drawings, in which like elements in different drawings are numbered identically. The drawings which are not necessarily to scale, depict selected embodiments and are not intended to limit the scope of the invention.
[0026]Examples of constructions, materials, dimensions, and manufacturing processes are provided for selected elements. All other elements employ that which is known to those of skill in the field of the invention. Those skilled in the art will recognize that many of the examples provided have suitable alternatives which may be utilized.
[0027]FIG. 1 is a perspective view of a thrombus filter 20. Thrombus filter 20 includes a body member 22 and a plurality of elongated struts 24. Struts 24 each have a joined end 26 and a free end 28. Joined end 26 of each strut 24 is fixedly attached to body member 22.
[0028]Struts 24 may be fabricated from wire with a circular or rectangular cross section. For ex...
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A thrombus filter which can be securely fixed at a selected location in the vascular system of a patient and removed when no longer required. The thrombus filter includes a body portion and a plurality of struts, each strut having a joined end and a free end. The joined end of each strut is fixably attached to the body portion. The struts radiate outwardly from the body member such that the thrombus filter is generally conical in shape. The free end of each strut includes an anchor member. A weakened portion is disposed proximate the free end of each strut. When removal of the thrombus filter is desired, forces are applied to the thrombus filter causing the struts to break at the weakened portions proximate the free ends.
Description
RELATED APPLICATIONS[0001]This application is a continuation of U.S. application Ser. No. 10 / 615,652 filed Jul. 9, 2003, which is a continuation of U.S. application Ser. No. 09 / 804,319 filed Mar. 12, 2001, now U.S. Pat. No. 6,620,183, which is a continuation of U.S. application Ser. No. 09 / 491,272 filed Jan. 26, 2000, now U.S. Pat. No. 6,217,600.FIELD OF THE INVENTION[0002]The present invention relates generally to filters for use inside blood vessels. More particularly, the present invention relates to thrombus filters which can be securely affixed at a selected location in the vascular system and removed when no longer required.BACKGROUND OF THE INVENTION[0003]There are a number of situations in the practice of medicine when it becomes desirable for a physician to place a filter in the vascular system of a patient. One of the most common applications for vascular filters is the treatment of Deep Venous Thrombosis (DVT). Deep Venous Thrombosis patients experience clotting of blood ...
Claims
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IPC IPC(8): A61F2/01A61B17/00A61B17/12A61F2/00
CPCA61B2017/1205A61B2019/307A61F2/01A61F2002/011A61F2230/008A61F2250/0071A61F2230/005A61F2230/0067A61F2002/016A61B2090/037A61F2/0105A61F2/011
Inventor DIMATTEO, KRISTIAN
Owner BOSTON SCI SCIMED INC