US5720764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vena cava thrombus filter
Assignee: Individual
•
Filing: 1995-06-10
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Granted: 1998-02-24
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Expires: 2015-06-10
Abstract
Abstract A vena cava thrombus filter includes a catheter for insertion in a vein including a tube of flexible plastic and a guiding and holding wire supported and axially displaceable in the tube. The distal end of the wire has a filter element formed of wires which are elastically expandable inside a vein, wherein, in a forwardly pushed position outside of the catheter insertion end, the wires can expand to form a basket through which liquid can flow. The catheter has at the handling end of the guiding and holding wire a handle, and a fitting closable to irrigation fluid provided with a bayonet lock for fastening the handle relative to the fitting. The fitting has a metallic guide sleeve, wherein the flexible tube of the catheter is pulled over the metallic guide sleeve. A flexible rubber or plastic sleeve is arranged over the metallic guide sleeve and the flexible tube pulled over the metallic guide sleeve.
Inventors
- 👤 Eduard Naderlinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:05
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/01; A61F2/011; A61F2002/016; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006; A61F2230/0063; A61F2230/0071
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
178 words
A vena cava thrombus filter comprising a catheter for insertion in a vein, the catheter comprising a tube of flexible plastic and a guiding and holding wire axially displaceably supported in the tube of flexible plastic, the guiding and holding wire having a handling end and a distal end, the distal end having a filter element formed of wires configured to be elastically expandable inside a vein, wherein, in a forwardly pushed position outside of an insertion end of the catheter, the wires are expandable to form a basket through which liquid can flow, further comprising a handle mounted at the handling end of the guiding and holding wire, a fitting closable to irrigation fluid and having means comprising a bayonet lock for fastening the handle relative to the fitting, the fitting further having a metallic guide sleeve, the flexible tube of the catheter being pulled over the metallic guide sleeve, and a flexible rubber or plastic sleeve being arranged over the metallic guide sleeve and the flexible tube of the catheter pulled over the metallic guide sleeve.
Claim 2
Dependent Claim
178 words
A vena cava thrombus filter comprising a catheter for insertion in a vein, the catheter comprising a tube of flexible plastic and a guiding and holding wire axially displaceably supported in the tube of flexible plastic, the guiding and holding wire having a handling end and a distal end, the distal end having a filter element formed of wires configured to be elastically expandable inside a vein, wherein, in a forwardly pushed position outside of an insertion end of the catheter, the wires are expandable to form a basket through which liquid can flow, further comprising a handle mounted at the handling end of the guiding and holding wire, a fitting closable to irrigation fluid and having means comprising a bayonet lock for fastening the handle relative to the fitting, the fitting further having a metallic guide sleeve, the flexible tube of the catheter being pulled over the metallic guide sleeve, and a flexible rubber or plastic sleeve being arranged over the metallic guide sleeve and the flexible tube of the catheter pulled over the metallic guide sleeve.
Claim 3
Dependent Claim
84 words
The vena cava thrombus filter according to claim 1, further comprising a metal sleeve arranged at a distal end of the wires forming the filter element, and a Teflon-coated guide wire having a Teflon-coated J-shaped guide wire tip being fastened to the metal sleeve, wherein the guiding and holding wire is axially displaceable in the tube of flexible plastic by a distance which is at least equal to a combined length of the basket and of the metal sleeve and the Teflon-coated guide wire.
Claim 4
Dependent Claim
30 words
The vena cava thrombus filter according to claim 1, wherein the basket formed by the wires has a diameter of approximately 35 mm and a length of approximately 55 mm.
Claim 5
Dependent Claim
28 words
The vena cava thrombus filter according to claim 3, wherein the basket comprises a plurality of implant-quality memory wires capable of opening up into a bulging helical shape.
Claim 6
Dependent Claim
19 words
The vena cava thrombus filter according to claim 4, comprising eight memory wires having a diameter of 0.08 mm.
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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) | 2001-02-23 | 2001-08-25 | 2002-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-02-23 | 2005-08-25 | 2006-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-02-23 | 2009-08-25 | 2010-02-24 | $7700.00 | Window Closed / Lapsed |