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Percutaneous retrievable vascular filter

A filter, blood vessel technology, applied in the direction of filters, blood vessels, catheters, etc. in blood vessels, which can solve problems such as impossible recovery

Inactive Publication Date: 2012-01-04
MERIT MEDICAL SYST INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Migration or tilting further makes filter retrieval difficult or impossible

Method used

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  • Percutaneous retrievable vascular filter
  • Percutaneous retrievable vascular filter
  • Percutaneous retrievable vascular filter

Examples

Experimental program
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Embodiment Construction

[0053] The present invention provides a vena cava filter ("filter") which may be permanent or retractable and which may be used to temporarily or permanently prevent pulmonary embolism (PE). The filter can be inserted into the body percutaneously through a vein such as the femoral vein. The filter has a tube-in-tube structure that produces hemispherical shapes that may or may not overlap when deployed. Together with the hemisphere forms a cage when unfolded. The filter is positioned within the vena cava at or below the renal vein junction. The hemispherical shape or cage of the filter ensures stable and non-migrating vena cava filtration. Because the hemisphere is collapsible, the filter can be easily retracted from the vena cava. Additionally, the design of the present filter allows the filter to be retracted from either end.

[0054] A filter may be formed from a first tube and a second tube. The first tube has a first plurality of slots, a second plurality of slots, a ...

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Abstract

Retrievable vena cava filters for the temporary or permanent prevention of Pulmonary embolism (PE) are disclosed. A filter in accordance with the present invention has a tube-within-tube structure with overlapping semi-spheres. The semispheres comprise a plurality of expandable legs. The first tube may have a plurality of slots allowing for deployment of a first, second, third or fourth sets of expandable legs on the second tube. The free end of each leg in the first set of expandable legs is oriented in a direction opposite to the free end of each leg in the second set forming a cage which comprises legs from the first and second sets of expandable legs. The design of the present invention allows retrieval of the filter by a catheter and snare from either end of the filter.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application Nos. 61 / 149,482 (filed February 3, 2009) and 61 / 180,041 (filed May 20, 2009). technical field [0003] The present invention relates to intravascular filters. In particular, the invention relates to vena cava filters which may be permanent or retractable. Background technique [0004] Pulmonary embolism (PE) is a common health problem and the leading cause of death in all age groups. Most pulmonary embolisms are caused by deep vein thrombosis (DVT) in the lower extremities or pelvis. A blood clot that forms in another part of the body may migrate through the veins back to the heart and into the lungs, causing a pulmonary infarction due to loss of blood and oxygen supply to part of the lungs. An important risk factor for the development of DVT is venous stasis; common conditions include bedridden injured patients and passengers on long-distance aircraft f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M29/00
CPCA61F2230/0078A61F2002/061A61F2002/016A61F2002/011A61F2/01A61F2230/005A61F2002/018A61F2230/008A61F2/0103A61F2/011A61M25/01A61M29/00
Inventor 迈克尔·J·哈利赛
Owner MERIT MEDICAL SYST INC
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