Patent US6582447B1 successfully refreshed from Google Patents.
US6582447B1
Expired / Lapsed
US
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Convertible blood clot filter
Assignee: Angiodynamics Inc
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Filing: 2000-10-20
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Granted: 2003-06-24
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Expires: 2020-10-20
Abstract
Abstract A vena cava blood clot filter is described that is attached to the walls of the vena cava by barbed anchors. In its filtering state, the filter is cone shaped which causes the blood to be filtered. The cone shape is formed by an appropriate restraining mechanism. When it is desired to stop filtering, the restraining mechanism is released and the filter takes a cylindrical shape. The cylindrical shaped filter will then line the vena cava wall and cease filtration of the blood.
Inventors
- 👤 Nilesh Patel
- 👤 Kenneth P. Moresco
- 👤 William M. Appling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:10
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/22; A61B17/221; A61F; A61F2/00; A61F2/01; A61F2002/016; A61F2230/00; A61F2230/0002; A61F2230/0028; A61F2230/005; A61F2230/0063; A61F2230/0067
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
138 words
A blood filter mechanism for use in a vascular lumen comprising: an implantable filter having an active state and an inactive state; said filter, when in said active state, being positioned to catch blood clots while said filter is implanted in the vascular lumen; and said filter, when in said inactive state, being positioned to pass blood clots while said filter is implanted in the vascular lumen; a switching mechanism to switch said filter from said active state to said inactive state comprising a breakable element holding said filter in a position to intercept particles in blood flowing in the vascular lumen to establish said active state; said filter switched from said active state to said inactive status by breaking said breakable element; wherein said breakable element remains attached to said filter after said breakable clement is broken.
Claim 2
Dependent Claim
138 words
A blood filter mechanism for use in a vascular lumen comprising: an implantable filter having an active state and an inactive state; said filter, when in said active state, being positioned to catch blood clots while said filter is implanted in the vascular lumen; and said filter, when in said inactive state, being positioned to pass blood clots while said filter is implanted in the vascular lumen; a switching mechanism to switch said filter from said active state to said inactive state comprising a breakable element holding said filter in a position to intercept particles in blood flowing in the vascular lumen to establish said active state; said filter switched from said active state to said inactive status by breaking said breakable element; wherein said breakable element remains attached to said filter after said breakable clement is broken.
Claim 3
Dependent Claim
19 words
The blood filter mechanism as claimed in claim 1 , wherein said filter is biased toward said inactive state.
Claim 4
Dependent Claim
18 words
The blood filter mechanism as claimed in claim 1 , wherein said breakable element is composed of polytetrafluoroethylene.
Claim 5
Dependent Claim
23 words
The blood filter mechanism as claimed in claim 1 , wherein said filter is attached to the vascular lumen by a barbed anchor.
Claim 6
Dependent Claim
21 words
The blood filter mechanism as claimed in claim 1 , wherein said filter forms a conical shape in said active state.
Claim 7
Dependent Claim
21 words
The blood filter mechanism as claimed in claim 1 , wherein said filter forms a cylindrical shape in said inactive state.
Claim 8
Dependent Claim
28 words
The blood filter mechanism as claimed in claim 1 , wherein said filter in said active state is sized to pass blood clots less than a predetermined size.
Claim 9
Dependent Claim
17 words
The blood filter mechanism as claimed in claim 7 , wherein said predetermined size is three millimeters.
Claim 10
Dependent Claim
19 words
The blood filter mechanism as claimed in claim 1 wherein said switching mechanism further comprises a balloon angioplasty catheter.
Claim 11
Dependent Claim
25 words
The blood filter mechanism as claimed in claim 1 wherein said filter in said inactive state is aligned against the walls of the vascular lumen.
Claim 12
Dependent Claim
123 words
A blood filtering method for use in a vascular lumen comprising: implanting an implantable filter having an active state and an inactive state; positioning said filter, when in said active state, to catch blood clots while said filter is implanted in the vascular lumen; and positioning said filter, when in said inactive state, to pass blood clots while said filter is implanted in the vascular lumen; holding said filter in a position with a breakable element to intercept particles in blood flowing in the vascular lumen to establish said active state; and watching said filter from said active state to said inactive status by breaking said breakable element; wherein said breakable element remains attached to said filter after said breakable element is broken.
Claim 13
Dependent Claim
123 words
A blood filtering method for use in a vascular lumen comprising: implanting an implantable filter having an active state and an inactive state; positioning said filter, when in said active state, to catch blood clots while said filter is implanted in the vascular lumen; and positioning said filter, when in said inactive state, to pass blood clots while said filter is implanted in the vascular lumen; holding said filter in a position with a breakable element to intercept particles in blood flowing in the vascular lumen to establish said active state; and watching said filter from said active state to said inactive status by breaking said breakable element; wherein said breakable element remains attached to said filter after said breakable element is broken.
Claim 14
Dependent Claim
19 words
The blood filtering method as claimed in claim 11 , wherein said filter is pre-biased toward said inactive state.
Claim 15
Dependent Claim
18 words
The blood filtering method as claimed in claim 11 , wherein said breakable element is composed of polytetrafluoroethylene.
Claim 16
Dependent Claim
23 words
The blood filtering method as claimed in claim 11 , wherein said filter is attached to the vascular lumen by a barbed anchor.
Claim 17
Dependent Claim
21 words
The blood filtering method as claimed in claim 11 , wherein said filter forms a conical shape in said active state.
Claim 18
Dependent Claim
21 words
The blood filtering method as claimed in claim 11 , wherein said filter forms a cylindrical shape in said inactive state.
Claim 19
Dependent Claim
28 words
The blood filtering method as claimed in claim 11 , wherein said filter in said active state is sized to pass blood clots less than a predetermined size.
Claim 20
Dependent Claim
17 words
The blood filtering method as claimed in claim 17 , wherein said predetermined size is three millimeters.
Claim 21
Dependent Claim
19 words
The blood filtering method as claimed in claim 11 wherein said switching method further comprises a balloon angioplasty catheter.
Claim 22
Dependent Claim
39 words
The blood filtering method as claimed in claim 11 wherein said switching step further comprises using an endovascular device having a sharp portion capable of cutting said breakable element and a hook portion capable of grabbing said breakable element.
Claim 23
Dependent Claim
25 words
The blood filtering method as claimed in claim 11 wherein said filter in said inactive static is aligned against the walls of the vascular lumen.
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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) | 2006-06-23 | 2006-12-23 | 2007-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-06-23 | 2010-12-23 | 2011-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-06-23 | 2014-12-23 | 2015-06-24 | $7700.00 | Window Closed / Lapsed |