US6027520A
Expired / Lapsed
US
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Percutaneous catheter and guidewire having filter and medical device deployment capabilities
Assignee: Boston Scientific Scimed Inc
•
Filing: 1999-04-05
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Granted: 2000-02-22
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Expires: 2019-04-05
Abstract
Abstract An apparatus and method for treating stenosed blood vessels is provided, more particularly a percutaneous catheter, including a filter for capturing loose embolic material, used to deliver a stent, preferably within the ascending aorta, the aortic arch, or the carotid arteries. The catheter includes an expandable stent deployed on an inflatable balloon, or alternatively a self-expanding stent. A filter assembly is provided either directly on the catheter, or in a separate sheath or on a guidewire. The filter assembly comprises an expansion frame, having filter mesh attached to it, disposed on a guidewire inserted through the catheter or sheath, or alternatively attached directly on a distal region of the catheter. The expansion frame comprises a structure which is activated from a contracted condition into an enlarged condition in a blood vessel, thereby traversing the vessel with the filter mesh. The expansion frame includes biased struts, a mechanically operated frame, and/or a fluid-operated frame. The catheter is percutaneously introduced into a blood vessel and directed to a target region. The stent is localized across the region, the filter assembly is opened, and the stent is deployed, substantially permanently engaging the walls of the blood vessel, thereby opening the stenosed region and/or containing aortic plaque.
Inventors
- 👤 Ross S. Tsugita
- 👤 Tracy D. Maahs
- 👤 Yue-Teh Jang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:43
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/01; A61F2/013; A61F2/0105; A61F2/0108; A61F2/011; A61B; A61B17/00; A61B17/22; A61B17/221; A61B2017/2212; A61B17/32; A61B17/3205; A61B17/3207; A61B2017/320716; A61F2/014; A61F2/82; A61F2/95; A61F2002/018; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006; A61F2230/0028; A61F2230/005; A61F2230/0063; A61F2230/0067; A61F2230/0071; A61F2230/0073; A61F2230/0076; A61F2230/008; A61F2230/0093; A61F2250/00; A61F2250/0003
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
158 words
A method of protecting a patient from embolization during a percutaneous procedure on a vessel, comprising the steps of: providing a guidewire having proximal and distal ends, a proximal and a distal region, an expandable filter associated with the distal region, and a removable sheath which covers the expandable filter and is slidable over the guidewire; introducing the distal end of the guidewire into the patient's vessel with the sheath covering the expandable filter, and positioning the filter downstream of a region of interest, wherein the sheath and guidewire cross the region of interest; sliding the sheath toward the proximal end of the guidewire and removing the sheath from the vessel, wherein the expandable filter is uncovered; deploying the filter; advancing over the guidewire a stent-deployment catheter to the region of interest; and expanding the stent at the region of interest, wherein embolic material is generated and captured before the expandable filter is removed from the patient's vessel.
Claim 2
Independent Claim
158 words
A method of protecting a patient from embolization during a percutaneous procedure on a vessel, comprising the steps of: providing a guidewire having proximal and distal ends, a proximal and a distal region, an expandable filter associated with the distal region, and a removable sheath which covers the expandable filter and is slidable over the guidewire; introducing the distal end of the guidewire into the patient's vessel with the sheath covering the expandable filter, and positioning the filter downstream of a region of interest, wherein the sheath and guidewire cross the region of interest; sliding the sheath toward the proximal end of the guidewire and removing the sheath from the vessel, wherein the expandable filter is uncovered; deploying the filter; advancing over the guidewire a stent-deployment catheter to the region of interest; and expanding the stent at the region of interest, wherein embolic material is generated and captured before the expandable filter is removed from the patient's vessel.
Claim 3
Dependent Claim
44 words
The method of claim 1, further comprising the steps of: removing the stent & deployment catheter from the vessel; advancing the sheath into the vessel over the guidewire until the sheath covers the expandable filter; and removing the guidewire and sheath from the vessel.
Claim 4
Dependent Claim
15 words
The method of claim 1, wherein the stent is deployed by inflation of a balloon.
Claim 5
Dependent Claim
14 words
The method of claim 1, wherein the stent-deployment catheter is a rapid exchange catheter.
Claim 6
Dependent Claim
45 words
The method of claim 1, wherein the expandable filter comprises a plurality of struts, each strut having a proximal end in contact with the guidewire and a distal end in contact with the guidewire, and wherein the struts expand to the shape of an eggbeater.
Claim 7
Dependent Claim
13 words
The method of claim 1, wherein the expandable filter includes a filter mesh.
Claim 8
Dependent Claim
16 words
The method of claim 1, wherein the expandable filter comprises a plurality of radially biased struts.
Claim 9
Dependent Claim
23 words
The method of claim 1, wherein the expandable filter comprises a plurality of radially expandable struts which are operable to expand radially outwardly.
Claim 10
Dependent Claim
187 words
A percutaneous system having filter and stent deployment capabilities, comprising: a guidewire having proximal and distal ends, a proximal and distal region, and an expandable filter associated with the distal region; a sheath which is shaped to receive the guidewire and retain the filter in a contracted condition, and to slidably release the filter to an expanded condition when the sheath moves toward the proximal end of the guide wire; a catheter having a proximal and a distal end, a proximal and a distal region, and a lumen which slidably receives the guidewire; and an expandable stent disposed about the distal region of the catheter, the stent having a first diameter which permits intraluminal delivery of the stent into a body passageway and which places the stent in close proximity to the catheter, and having a second expanded diameter adapted to substantially engage a wall of the body passageway, wherein, during use, the guidewire is positioned across a region of interest, the filter is expanded, and the stent is deployed within the region of interest and remains in place after removal of the catheter from the vessel.
Claim 11
Dependent Claim
187 words
A percutaneous system having filter and stent deployment capabilities, comprising: a guidewire having proximal and distal ends, a proximal and distal region, and an expandable filter associated with the distal region; a sheath which is shaped to receive the guidewire and retain the filter in a contracted condition, and to slidably release the filter to an expanded condition when the sheath moves toward the proximal end of the guide wire; a catheter having a proximal and a distal end, a proximal and a distal region, and a lumen which slidably receives the guidewire; and an expandable stent disposed about the distal region of the catheter, the stent having a first diameter which permits intraluminal delivery of the stent into a body passageway and which places the stent in close proximity to the catheter, and having a second expanded diameter adapted to substantially engage a wall of the body passageway, wherein, during use, the guidewire is positioned across a region of interest, the filter is expanded, and the stent is deployed within the region of interest and remains in place after removal of the catheter from the vessel.
Claim 12
Dependent Claim
22 words
The system of claim 9 wherein the expandable filter comprises an expansion frame and a filter mesh attached to the expansion frame.
Claim 13
Dependent Claim
23 words
The system of claim 10, wherein the expansion frame comprises a plurality of struts which, upon activation, bend outwardly to the enlarged condition.
Claim 14
Dependent Claim
70 words
The system of claim 11, wherein the guidewire includes a distal segment which can be moved longitudinally relative to a proximal segment, and wherein the proximal end of each strut is in contact with the proximal segment and a distal end of each strut is in contact with the distal segment, and wherein the struts expand radially when the distal segment is pulled toward the proximal region of the catheter.
Claim 15
Dependent Claim
21 words
The system of claim 10, wherein the expansion frame comprises radially biased struts attached to an outer surface of the catheter.
Claim 16
Dependent Claim
42 words
The system of claim 13, wherein a proximal end of each strut is in contact with the catheter and the distal end of each strut is in contact with the catheter, and wherein the struts expand to the shape of an eggbeater.
Claim 17
Dependent Claim
13 words
The system of claim 10, wherein the expansion frame comprises an inflation seal.
Claim 18
Dependent Claim
96 words
The system of claim 15, further comprising an inflation system comprising a first lumen adapted to receive pressurized fluid and a second lumen adapted to evacuate gas, and wherein the inflation seal further includes an entry port in fluid communication with the first lumen of the inflation system and an exit port in fluid communication with the second lumen of the inflation system, so that when fluid is advanced through the first lumen, the fluid enters the inflation seal and forces gas from the inflation seal through the second lumen, thereby purging the system of gas.
Claim 19
Dependent Claim
41 words
The system of claim 15, wherein the inflation seal comprises a tubular balloon which encloses a chamber and wherein the entry port and exit port are in close proximity, and wherein a septum is disposed between the entry and exit ports.
Claim 20
Dependent Claim
13 words
The system of claim 9, wherein the stent and the filter are self-expanding.
Claim 21
Dependent Claim
10 words
The system of claim 9, wherein the stent is removable.
Claim 22
Dependent Claim
10 words
The system of claim 9, wherein the stent is self-expanding.
Claim 23
Dependent Claim
12 words
The system of claim 9, wherein the stent comprises stainless steel material.
Claim 24
Dependent Claim
11 words
The system of claim 9, wherein the stent comprises nitinol material.
Claim 25
Dependent Claim
28 words
The system of claim 9, wherein the stent has a shape selected from the group consisting of a tube, a sheet, a wire, a mesh, and a spring.
Claim 26
Dependent Claim
22 words
The system of claim 9, wherein the sheath is shaped to receive the catheter and retain the stent at the first diameter.
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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) | 2003-02-21 | 2003-08-23 | 2004-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-02-21 | 2007-08-23 | 2008-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-02-21 | 2011-08-23 | 2012-02-22 | $7700.00 | Window Closed / Lapsed |