US5989281A
Expired / Lapsed
US
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Cannula with associated filter and methods of use during cardiac surgery
Assignee: Edwards Lifesciences Corp
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Filing: 1997-04-16
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Granted: 1999-11-23
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Expires: 2017-04-16
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
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:21
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: 35
Claim 1
Independent Claim
130 words
A method for protecting a patient from embolization during cardiopulmonary bypass, comprising the steps of: providing a cannula having a lumen, said cannula adapted to receive a separately insertable blood filter device having a filter adapted to operate at a site within the aorta of the patient, and to be removed thereafter; introducing the cannula into the patient's aorta; introducing the blood filter device through said cannula into the patient's aorta; deploying the filter at the site within the patient's aorta; blocking the aorta in a region upstream of the site within the patient's aorta; and removing the blood filter device from the patient's aorta after the step of blocking the aorta, wherein embolic material is generated and filtered before the blood filter device is removed from the patient's aorta.
Claim 2
Independent Claim
130 words
A method for protecting a patient from embolization during cardiopulmonary bypass, comprising the steps of: providing a cannula having a lumen, said cannula adapted to receive a separately insertable blood filter device having a filter adapted to operate at a site within the aorta of the patient, and to be removed thereafter; introducing the cannula into the patient's aorta; introducing the blood filter device through said cannula into the patient's aorta; deploying the filter at the site within the patient's aorta; blocking the aorta in a region upstream of the site within the patient's aorta; and removing the blood filter device from the patient's aorta after the step of blocking the aorta, wherein embolic material is generated and filtered before the blood filter device is removed from the patient's aorta.
Claim 3
Dependent Claim
17 words
The method of claim 1, wherein the filter is deployed before the step of blocking the aorta.
Claim 4
Dependent Claim
26 words
The method of claim 1, further comprising the step of unblocking the aorta, and wherein the filter is deployed before the step of unblocking the aorta.
Claim 5
Dependent Claim
18 words
The method of claim 1, wherein the blood filter device is introduced through the lumen of said cannula.
Claim 6
Dependent Claim
12 words
The method of claim 1, wherein the embolic material comprises atheromatous material.
Claim 7
Dependent Claim
12 words
The method of claim 1, wherein the embolic material comprises gaseous bubbles.
Claim 8
Dependent Claim
16 words
The method of claim 1, wherein the step of blocking the aorta includes clamping the aorta.
Claim 9
Dependent Claim
18 words
The method of claim 1, further comprising the step of performing coronary artery bypass surgery on the patient.
Claim 10
Dependent Claim
19 words
The method of claim 1, wherein the lumen of the cannula delivers blood to the aorta during cardiopulmonary bypass.
Claim 11
Dependent Claim
20 words
The method of claim 1, wherein the filter is deployed in the ascending aorta between the heart and carotid arteries.
Claim 12
Independent Claim
133 words
A method for protecting a patient from embolization during cardiopulmonary bypass, comprising the steps of: providing a cannula having a lumen, said cannula adapted to receive a separately insertable blood filter device having a filter adapted to operate at a site within the aorta of the patient, and to be removed thereafter; introducing the cannula into the patient's aorta; introducing the blood filter device through said cannula into the patient's aorta; blocking the aorta in the region upstream of the site within the patient's aorta; deploying the filter at the site within the patient's aorta; unblocking the aorta; and removing the blood filter device from the patient's aorta after the step of unblocking the aorta, wherein embolic material is generated and filtered before the blood filter device is removed from the patient's aorta.
Claim 13
Independent Claim
133 words
A method for protecting a patient from embolization during cardiopulmonary bypass, comprising the steps of: providing a cannula having a lumen, said cannula adapted to receive a separately insertable blood filter device having a filter adapted to operate at a site within the aorta of the patient, and to be removed thereafter; introducing the cannula into the patient's aorta; introducing the blood filter device through said cannula into the patient's aorta; blocking the aorta in the region upstream of the site within the patient's aorta; deploying the filter at the site within the patient's aorta; unblocking the aorta; and removing the blood filter device from the patient's aorta after the step of unblocking the aorta, wherein embolic material is generated and filtered before the blood filter device is removed from the patient's aorta.
Claim 14
Dependent Claim
17 words
The method of claim 11, wherein the filter is deployed before the step of blocking the aorta.
Claim 15
Dependent Claim
16 words
The method of claim 12, wherein the step of blocking the aorta includes clamping the aorta.
Claim 16
Dependent Claim
17 words
The method of claim 11, wherein the filter is deployed before the step of unblocking the aorta.
Claim 17
Dependent Claim
18 words
The method of claim 11, wherein the blood filter device is introduced through the lumen of said cannula.
Claim 18
Dependent Claim
12 words
The method of claim 11, wherein the embolic material comprises atheromatous material.
Claim 19
Dependent Claim
12 words
The method of claim 11, wherein the embolic material comprises gaseous bubbles.
Claim 20
Dependent Claim
18 words
The method of claim 11, further comprising the step of performing coronary artery bypass surgery on the patient.
Claim 21
Dependent Claim
19 words
The method of claim 11, wherein the lumen of the cannula delivers blood to the aorta during cardiopulmonary bypass.
Claim 22
Dependent Claim
20 words
The method of claim 11, wherein the filter is deployed in the ascending aorta between the heart and carotid arteries.
Claim 23
Independent Claim
144 words
A method for protecting a patient from embolization during cardiopulmonary bypass, comprising the steps of: providing a cannula having a lumen, said cannula adapted to receive a separately insertable blood filter device having a filter adapted to operate at a site within the aorta of the patient, and to be removed thereafter; introducing the cannula into the patient's aorta; introducing the blood filter device through said cannula into the patient's aorta; deploying the filter at the site within the patient's aorta; placing the patient on cardiopulmonary bypass; manipulating the aorta or heart in a region upstream of the site within the patient's aorta; removing the patient from cardiopulmonary bypass; and removing the blood filter device from the patient's aorta after the step of manipulating the aorta, wherein embolic material is generated and filtered before the blood filter device is removed from the patient's aorta.
Claim 24
Independent Claim
144 words
A method for protecting a patient from embolization during cardiopulmonary bypass, comprising the steps of: providing a cannula having a lumen, said cannula adapted to receive a separately insertable blood filter device having a filter adapted to operate at a site within the aorta of the patient, and to be removed thereafter; introducing the cannula into the patient's aorta; introducing the blood filter device through said cannula into the patient's aorta; deploying the filter at the site within the patient's aorta; placing the patient on cardiopulmonary bypass; manipulating the aorta or heart in a region upstream of the site within the patient's aorta; removing the patient from cardiopulmonary bypass; and removing the blood filter device from the patient's aorta after the step of manipulating the aorta, wherein embolic material is generated and filtered before the blood filter device is removed from the patient's aorta.
Claim 25
Dependent Claim
17 words
The method of claim 21, wherein the filter is deployed before the step of manipulating the aorta.
Claim 26
Dependent Claim
20 words
The method of claim 21, wherein the filter is deployed before the step of placing the patient on cardiopulmonary bypass.
Claim 27
Dependent Claim
19 words
The method of claim 21, wherein the step of manipulating the aorta includes the step of blocking the aorta.
Claim 28
Dependent Claim
19 words
The method of claim 21, wherein the step of manipulating the aorta includes the step of unblocking the aorta.
Claim 29
Dependent Claim
18 words
The method of claim 21, wherein the blood filter device is introduced through the lumen of said cannula.
Claim 30
Dependent Claim
12 words
The method of claim 21, wherein the embolic material comprises atheromatous material.
Claim 31
Dependent Claim
12 words
The method of claim 21, wherein the embolic material comprises gaseous bubbles.
Claim 32
Dependent Claim
16 words
The method of claim 21, wherein the step of blocking the aorta includes clamping the aorta.
Claim 33
Dependent Claim
18 words
The method of claim 21, further comprising the step of performing coronary artery bypass surgery on the patient.
Claim 34
Dependent Claim
19 words
The method of claim 21, wherein the lumen of the cannula delivers blood to the aorta during cardiopulmonary bypass.
Claim 35
Dependent Claim
20 words
The method of claim 21, wherein the filter is deployed in the ascending aorta between the heart and carotid arteries.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2002-11-22 | 2003-05-24 | 2003-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-11-22 | 2007-05-24 | 2007-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-11-22 | 2011-05-24 | 2011-11-23 | $7700.00 | Window Closed / Lapsed |