US5549626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vena caval filter
Assignee: Hospital for Special Surgery
•
Filing: 1994-12-23
•
Granted: 1996-08-27
•
Expires: 2014-12-23
Abstract
Abstract A co-axial filtering device for removing particles from arteries and veins comprises an outer catheter that can be inserted into a blood vessel and an inner catheter with a filter at its distal end. The filter is a radially expandable receptacle made of an elastic mesh structure of spring wires or plastic monofilaments. The filter expands into engagement with the walls of the blood vessel when it is pushed from the distal end of the outer catheter. A syringe is attached to the proximal end of the inner catheter and particles entrapped within the filter are aspirated through the inner catheter into the syringe. When filtering is no longer necessary, the filter can easily be removed by pulling the elastic material through the outer catheter.
Inventors
- 👤 Theodore T. Miller
- 👤 Bernard Ghelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:40
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/01; A61F2/011; A61F2002/018; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006; A61F2230/0063; A61F2230/0073; A61F2230/008
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
101 words
A filtering device for removing particles from a blood vessel, comprising: an outer catheter having distal and proximal ends; an inner catheter for insertion through said outer catheter, said inner catheter having distal and proximal ends and a through lumen, and being movable relative to said outer catheter; a mesh-like collapsible basket attached to said distal end of said inner catheter, said basket being made of a radially expandable material which can be compressed by said outer catheter, whereby said basket will expand into contact with the blood vessel when said basket extends from said distal end of said outer catheter.
Claim 2
Dependent Claim
101 words
A filtering device for removing particles from a blood vessel, comprising: an outer catheter having distal and proximal ends; an inner catheter for insertion through said outer catheter, said inner catheter having distal and proximal ends and a through lumen, and being movable relative to said outer catheter; a mesh-like collapsible basket attached to said distal end of said inner catheter, said basket being made of a radially expandable material which can be compressed by said outer catheter, whereby said basket will expand into contact with the blood vessel when said basket extends from said distal end of said outer catheter.
Claim 3
Dependent Claim
45 words
The filtering device of claim 1, further comprising clamping means arranged at said proximal end of said inner and outer catheters for locking said inner and outer catheters together to prevent an unintended axial displacement of said inner and outer catheters relative to each other.
Claim 4
Independent Claim
124 words
A method for filtering particles from blood in a blood vessel of a patient comprising the steps of: introducing an outer catheter into the blood vessel; advancing said outer catheter to a desired location within the blood vessel; guiding an inner catheter having a contracted mesh-like collapsible basket distally attached to said inner catheter to said desired location within said outer catheter, said inner catheter having a suction means proximally attached; positioning said basket at a desired location beyond said distal end of said outer catheter whereby said basket expands radially within the blood vessel; aspirating the particles from within said basket by applying suction to said inner catheter; and withdrawing the basket from the blood vessel by pulling it through said outer catheter.
Claim 5
Independent Claim
124 words
A method for filtering particles from blood in a blood vessel of a patient comprising the steps of: introducing an outer catheter into the blood vessel; advancing said outer catheter to a desired location within the blood vessel; guiding an inner catheter having a contracted mesh-like collapsible basket distally attached to said inner catheter to said desired location within said outer catheter, said inner catheter having a suction means proximally attached; positioning said basket at a desired location beyond said distal end of said outer catheter whereby said basket expands radially within the blood vessel; aspirating the particles from within said basket by applying suction to said inner catheter; and withdrawing the basket from the blood vessel by pulling it through said outer catheter.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-08-27 | 2000-02-26 | 2000-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-27 | 2004-02-26 | 2004-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-27 | 2008-02-26 | 2008-08-27 | $7700.00 | Window Closed / Lapsed |