US5980555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of using cannula with associated filter during cardiac surgery
Assignee: Edwards Lifesciences Corp
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Filing: 1997-11-14
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Granted: 1999-11-09
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Expires: 2017-11-14
Abstract
Abstract Devices and methods for filtering blood. The devices generally comprise: a mesh for filtering blood flowing within a blood vessel, particularly within an artery such as the aorta; a structure adapted to open and close the mesh within the blood vessel; and a means to actuate the structure. The methods generally include the following steps: introducing a mesh into a blood vessel to entrap embolic material; adjusting the mesh, if necessary, during the course of filtration; and removing the mesh and the entrapped foreign matter from the blood vessel. Additionally, visualization techniques are used to ensure effective filtration.
Inventors
- 👤 Denise Barbut
- 👤 Jonathan D. Root
- 👤 Giovanni Pastrone
- 👤 James M. Sellers
- 👤 Robert Rizzari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:05
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/01; A61F2/011; A61F2002/018; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006; A61F2230/0063; A61F2230/0067; A61F2250/00; A61F2250/0003; A61M; A61M2210/00; A61M2210/12; A61M2210/127
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
173 words
A method for protecting a patient from embolization during cardiac surgery, comprising the steps of: providing a cannula having an outer surface, a distal end adapted to enter an artery, a proximal end adapted to receive blood from a bypass-oxygenator machine, a lumen which extends longitudinally from the proximal to the distal end, an inflation seal associated with the distal end which is expandable between a deflated condition and an inflated condition, the inflation seal having an entry port and an exit port, and a filter mesh having a first edge attached to the inflation seal; introducing fluid into the entry port of the inflation seal so that fluid enters the inflation seal and forces gas from the inflation seal through the exit port, thereby purging the system of gas; introducing the distal end of the cannula into the patient's aorta; deploying the filter within the patient's aorta; contracting the filter; and removing the cannula from the patient's aorta, wherein embolic material is captured by the filter and removed from the patient's aorta.
Claim 2
Independent Claim
173 words
A method for protecting a patient from embolization during cardiac surgery, comprising the steps of: providing a cannula having an outer surface, a distal end adapted to enter an artery, a proximal end adapted to receive blood from a bypass-oxygenator machine, a lumen which extends longitudinally from the proximal to the distal end, an inflation seal associated with the distal end which is expandable between a deflated condition and an inflated condition, the inflation seal having an entry port and an exit port, and a filter mesh having a first edge attached to the inflation seal; introducing fluid into the entry port of the inflation seal so that fluid enters the inflation seal and forces gas from the inflation seal through the exit port, thereby purging the system of gas; introducing the distal end of the cannula into the patient's aorta; deploying the filter within the patient's aorta; contracting the filter; and removing the cannula from the patient's aorta, wherein embolic material is captured by the filter and removed from the patient's aorta.
Claim 3
Dependent Claim
14 words
The method of claim 1, wherein the expandable filter is mounted on the cannula.
Claim 4
Dependent Claim
15 words
The method of claim 2, wherein the embolic material is generated by manipulating the heart.
Claim 5
Dependent Claim
14 words
The method of claim 2, wherein embolic material is generated by manipulating the aorta.
Claim 6
Dependent Claim
13 words
The method of claim 4, further comprising the step of blocking the aorta.
Claim 7
Dependent Claim
18 words
The method of claim 5, wherein the expandable filter is deployed before the step of blocking the aorta.
Claim 8
Dependent Claim
16 words
The method of claim 5, wherein the step of blocking the aorta includes cross-clamping the aorta.
Claim 9
Dependent Claim
13 words
The method of claim 5, further comprising the step of unblocking the aorta.
Claim 10
Dependent Claim
18 words
The method of claim 8, wherein the expandable filter is deployed before the step of unblocking the aorta.
Claim 11
Dependent Claim
15 words
The method of claim 1, wherein the expandable filter is separately inserted through the cannula.
References Cited (Backward Citations)
US3701433A
Cited
US4494531A
Cited
US4572724A
Cited
DE3417738A1
Cited
US4619246A
Cited
FR2567405A1
Cited
US4688553A
Cited
US4723549A
Cited
US4955895A
Cited
US4873978A
Cited
US4832055A
Cited
US5152777A
Cited
US4969891A
Cited
US5133733A
Cited
US5300086A
Cited
US5329942A
Cited
US5053008A
Cited
US5147379A
Cited
US5370685A
Cited
US5415630A
Cited
US5375612A
Cited
US5330451A
Cited
US5599329A
Cited
US5383887A
Cited
US5370657A
Cited
BR9301980A
Cited
US5549626A
Cited
WO1997017100A1
Cited
US5695519A
Cited
EP0791340A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-11-08 | 2003-05-10 | 2003-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-11-08 | 2007-05-10 | 2007-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-11-08 | 2011-05-10 | 2011-11-09 | $7700.00 | Window Closed / Lapsed |