US5160321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balloon catheters
Assignee: Boston Scientific Scimed Inc
•
Filing: 1991-11-27
•
Granted: 1992-11-03
•
Expires: 2011-11-27
Abstract
Abstract Dilatation catheters for use in administering treatments to relieve stenotic regions within a body lumen are described. In one aspect of the invention, a two wire catheter system, of minimal diameter for treating distal arteries is disclosed, In addition, a number of various dilatation balloon configurations, for treating stenotic areas which are present in tortuous vessels, as well as hardened, or calcified stenotic portions are also described. Finally, a catheter system which provides a path for conducting blood past the stenosis and inflated dilatation balloon is discussed.
Inventors
- 👤 Harvinder Sahota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:25
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/104; A61M25/1002; A61M25/1011; A61M2025/1013; A61M2025/1043; A61M2025/107
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
216 words
A dilation catheter for relieving an obstructed coronary artery while maintaining a steady flow of blood past the obstruction, comprising: an axially elongate catheter shaft; a guidewire conduit in said catheter shaft; a dilatation balloon, secured to said catheter shaft, said dilatation balloon having a proximal end and a distal end; an inflation lumen in said catheter shaft for transmitting pressurized fluid into and out of said dilatation balloon, for selective inflation and deflation thereof; a perfusion conduit in said catheter shaft for providing a path through which blood may bypass said dilatation balloon when said balloon is in an inflated state and occluding said artery, said perfusion conduit separate from said guidewire conduit, obviating the need to withdraw said guidewire to allow blood to bypass said dilatation balloon; a plurality of influent perfusion ports, disposed proximate to the proximal end of said dilatation balloon, said influent ports opening into said perfusion conduit so as to enable blood to enter said perfusion conduit; and at least one effluent perfusion port opening into said perfusion conduit, said effluent perfusion port disposed proximate said distal end of said dilatation balloon so as to conduct blood from said perfusion conduit back into said artery and maintain a steady flow of blood past said dilatation balloon during the dilatation process.
Claim 2
Dependent Claim
216 words
A dilation catheter for relieving an obstructed coronary artery while maintaining a steady flow of blood past the obstruction, comprising: an axially elongate catheter shaft; a guidewire conduit in said catheter shaft; a dilatation balloon, secured to said catheter shaft, said dilatation balloon having a proximal end and a distal end; an inflation lumen in said catheter shaft for transmitting pressurized fluid into and out of said dilatation balloon, for selective inflation and deflation thereof; a perfusion conduit in said catheter shaft for providing a path through which blood may bypass said dilatation balloon when said balloon is in an inflated state and occluding said artery, said perfusion conduit separate from said guidewire conduit, obviating the need to withdraw said guidewire to allow blood to bypass said dilatation balloon; a plurality of influent perfusion ports, disposed proximate to the proximal end of said dilatation balloon, said influent ports opening into said perfusion conduit so as to enable blood to enter said perfusion conduit; and at least one effluent perfusion port opening into said perfusion conduit, said effluent perfusion port disposed proximate said distal end of said dilatation balloon so as to conduct blood from said perfusion conduit back into said artery and maintain a steady flow of blood past said dilatation balloon during the dilatation process.
Claim 3
Dependent Claim
190 words
A catheter for dilatation of an obstructed artery while maintaining a steady flow of blood past the obstruction, comprising: an axially elongate catheter shaft, constructed and arranged for insertion into a body lumen, said catheter shaft having a perfusion conduit and a separate guide wire conduit extending axially therethrough; a dilatation balloon, secured to said catheter shaft, said dilatation balloon having a proximal end and a distal end; an inflation lumen adjacent at least one of said guide wire conduit and said perfusion conduit, said inflation lumen in fluid communication with said dilatation balloon for selective inflation and deflation of said dilatation balloon; at least one influent perfusion port, disposed upstream of the proximal end of said dilatation balloon, said influent port opening into said perfusion conduit to enable blood from said artery to enter said perfusion conduit; and at least one effluent perfusion port opening into said perfusion conduit, said effluent perfusion port disposed downstream of the distal end of said dilatation balloon to conduct blood from said perfusion conduit back into said artery and maintain a steady flow of blood past said dilatation balloon during the dilatation process.
Claim 4
Dependent Claim
190 words
A catheter for dilatation of an obstructed artery while maintaining a steady flow of blood past the obstruction, comprising: an axially elongate catheter shaft, constructed and arranged for insertion into a body lumen, said catheter shaft having a perfusion conduit and a separate guide wire conduit extending axially therethrough; a dilatation balloon, secured to said catheter shaft, said dilatation balloon having a proximal end and a distal end; an inflation lumen adjacent at least one of said guide wire conduit and said perfusion conduit, said inflation lumen in fluid communication with said dilatation balloon for selective inflation and deflation of said dilatation balloon; at least one influent perfusion port, disposed upstream of the proximal end of said dilatation balloon, said influent port opening into said perfusion conduit to enable blood from said artery to enter said perfusion conduit; and at least one effluent perfusion port opening into said perfusion conduit, said effluent perfusion port disposed downstream of the distal end of said dilatation balloon to conduct blood from said perfusion conduit back into said artery and maintain a steady flow of blood past said dilatation balloon during the dilatation process.
Claim 5
Dependent Claim
20 words
A catheter as defined by claim 2, wherein the guide wire conduit extends axially through and within said perfusion conduit.
Claim 6
Dependent Claim
33 words
A catheter as defined by claim 2, further comprising a guide wire, constructed and arranged for insertion into said guide wire conduit, said guide wire aiding in steering said catheter through said artery.
Claim 7
Dependent Claim
167 words
A dilatation catheter for relieving an obstructed artery while maintaining a steady flow of blood past the obstruction, comprising: an elongate tubular body; a dilatation balloon, secured to said tubular body, said balloon having two ends; a first conduit extending axially through at least a portion of said elongate tubular body for receiving a guide wire; a second conduit extending axially through at least a portion of the tubular body for allowing blood flow to bypass the dilatation balloon; at least one influent perfusion port in fluid communication with said second conduit, said influent perfusion port disposed upstream from said dilatation balloon so as to enable blood from said artery to enter said second conduit; and at least one effluent perfusion port in fluid communication with said second conduit, said effluent perfusion port disposed downstream from said dilatation balloon so as to conduct blood from said second conduit back into said artery and maintain a steady flow of blood past said dilatation balloon during the dilatation process.
Claim 8
Dependent Claim
167 words
A dilatation catheter for relieving an obstructed artery while maintaining a steady flow of blood past the obstruction, comprising: an elongate tubular body; a dilatation balloon, secured to said tubular body, said balloon having two ends; a first conduit extending axially through at least a portion of said elongate tubular body for receiving a guide wire; a second conduit extending axially through at least a portion of the tubular body for allowing blood flow to bypass the dilatation balloon; at least one influent perfusion port in fluid communication with said second conduit, said influent perfusion port disposed upstream from said dilatation balloon so as to enable blood from said artery to enter said second conduit; and at least one effluent perfusion port in fluid communication with said second conduit, said effluent perfusion port disposed downstream from said dilatation balloon so as to conduct blood from said second conduit back into said artery and maintain a steady flow of blood past said dilatation balloon during the dilatation process.
Claim 9
Independent Claim
150 words
A method of relieving stenotic regions of a body lumen while maintaining a steady flow of blood distal to the stenotic region, said method comprising the steps of: positioning a guide wire within a body lumen; mounting an axially elongate dilatation catheter with a separate perfusion conduit and guide wire conduit on the guide wire by positioning the guide wire within the guide wire conduit; advancing the dilatation catheter along the guide wire into the body lumen to position a dilatation balloon proximate said stenosis; injecting a suitable pressurized fluid into said dilatation balloon to increase radially the size of said dilatation balloon so as to increase the size of said lumen by radial expansion; channeling blood flow through said perfusion conduit so as to bypass said dilatation balloon without the need to move the guide wire; deflating the dilatation balloon; and withdrawing said dilatation catheter from said body lumen.
Claim 10
Independent Claim
150 words
A method of relieving stenotic regions of a body lumen while maintaining a steady flow of blood distal to the stenotic region, said method comprising the steps of: positioning a guide wire within a body lumen; mounting an axially elongate dilatation catheter with a separate perfusion conduit and guide wire conduit on the guide wire by positioning the guide wire within the guide wire conduit; advancing the dilatation catheter along the guide wire into the body lumen to position a dilatation balloon proximate said stenosis; injecting a suitable pressurized fluid into said dilatation balloon to increase radially the size of said dilatation balloon so as to increase the size of said lumen by radial expansion; channeling blood flow through said perfusion conduit so as to bypass said dilatation balloon without the need to move the guide wire; deflating the dilatation balloon; and withdrawing said dilatation catheter from said body lumen.
Claim 11
Dependent Claim
49 words
The method of claim 6, further comprising the step of leaving the catheter in the body lumen with said dilatation balloon across the stenosis, such that blood will perfuse through the perfusion conduit and bypass the stenotic region to maintain a steady flow of blood through said stenotic region.
Claim 12
Independent Claim
153 words
A method for maintaining steady blood flow through a stenotic region in a vascular lumen, said method comprising the steps of: positioning a guide wire within a body lumen; mounting an axially elongate dilatation catheter with a separate perfusion conduit and guide wire conduit on the guide wire by positioning the guide wire within the guide wire conduit; advancing the dilatation catheter along the guide wire into the body lumen to position a dilatation balloon proximate said stenotic region; channeling blood from said body lumen through at least one upstream influent perfusion port in fluid communication with said perfusion conduit; and channeling blood from said perfusion conduit through at least one downstream effluent perfusion port in fluid communication with said perfusion conduit without the need to move the guide wire, such that blood from said perfusion conduit flows back into said body lumen to maintain a steady blood flow through said stenotic region.
Claim 13
Independent Claim
153 words
A method for maintaining steady blood flow through a stenotic region in a vascular lumen, said method comprising the steps of: positioning a guide wire within a body lumen; mounting an axially elongate dilatation catheter with a separate perfusion conduit and guide wire conduit on the guide wire by positioning the guide wire within the guide wire conduit; advancing the dilatation catheter along the guide wire into the body lumen to position a dilatation balloon proximate said stenotic region; channeling blood from said body lumen through at least one upstream influent perfusion port in fluid communication with said perfusion conduit; and channeling blood from said perfusion conduit through at least one downstream effluent perfusion port in fluid communication with said perfusion conduit without the need to move the guide wire, such that blood from said perfusion conduit flows back into said body lumen to maintain a steady blood flow through said stenotic region.
Claim 14
Independent Claim
122 words
A method for maintaining steady blood flow through a stenotic region in a vascular lumen, said method comprising the steps of: positioning a guide wire within said vascular lumen; mounting an axially elongate dilatation catheter having a first conduit adapted to receive a guide wire and a second conduit for allowing blood to bypass a dilatation balloon on the guide wire by positioning the guide wire within the guide wire conduit; advancing the catheter along the guide wire into said vascular lumen to position said dilatation balloon proximate said stenotic region; and channeling blood flow through said second conduit to bypass said dilatation balloon to allow a steady blood flow through said stenotic region without the need to move the guide wire.
Claim 15
Independent Claim
122 words
A method for maintaining steady blood flow through a stenotic region in a vascular lumen, said method comprising the steps of: positioning a guide wire within said vascular lumen; mounting an axially elongate dilatation catheter having a first conduit adapted to receive a guide wire and a second conduit for allowing blood to bypass a dilatation balloon on the guide wire by positioning the guide wire within the guide wire conduit; advancing the catheter along the guide wire into said vascular lumen to position said dilatation balloon proximate said stenotic region; and channeling blood flow through said second conduit to bypass said dilatation balloon to allow a steady blood flow through said stenotic region without the need to move the guide wire.
Claim 16
Dependent Claim
183 words
A dilatation catheter for relieving an obstructed artery while maintaining a steady flow of blood past the obstruction, comprising: an elongate tubular body; a dilatation balloon, secured to said tubular body, said balloon having an upstream end and a downstream end; a first conduit extending axially through at least a portion of said elongate tubular body for receiving a guide wire; a second conduit extending axially about the first conduit and through at least a portion of the tubular body for allowing blood flow to bypass the dilatation balloon; a plurality of influent perfusion ports in fluid communication with said second conduit and disposed upstream from the upstream end of said dilatation balloon so as to enable blood from said artery to enter said second conduit; and at least one effluent perfusion port in fluid communication with said second conduit, and said effluent perfusion port disposed downstream from the downstream end of said dilatation balloon so as to conduct blood from said second conduit back into said artery and maintain a steady flow of blood past said dilatation balloon during the dilatation process.
Claim 17
Dependent Claim
183 words
A dilatation catheter for relieving an obstructed artery while maintaining a steady flow of blood past the obstruction, comprising: an elongate tubular body; a dilatation balloon, secured to said tubular body, said balloon having an upstream end and a downstream end; a first conduit extending axially through at least a portion of said elongate tubular body for receiving a guide wire; a second conduit extending axially about the first conduit and through at least a portion of the tubular body for allowing blood flow to bypass the dilatation balloon; a plurality of influent perfusion ports in fluid communication with said second conduit and disposed upstream from the upstream end of said dilatation balloon so as to enable blood from said artery to enter said second conduit; and at least one effluent perfusion port in fluid communication with said second conduit, and said effluent perfusion port disposed downstream from the downstream end of said dilatation balloon so as to conduct blood from said second conduit back into said artery and maintain a steady flow of blood past said dilatation balloon during the dilatation process.
Claim 18
Dependent Claim
195 words
A catheter for dilatation of an obstructed artery while maintaining a steady flow of blood past the obstruction, comprising: an axially elongate catheter shaft, constructed and arranged for insertion into a body lumen, said catheter shaft having a perfusion conduit and a separate guide wire conduit extending axially therethrough, wherein the guide wire conduit extends co-axially through and within said perfusion conduit; a dilatation balloon, secured to said catheter shaft, said dilatation balloon having a proximal end and a distal end; an inflation lumen adjacent at least one of said guide wire conduit and said perfusion conduit, said inflation lumen in fluid communication with said dilatation balloon for selective inflation and deflation of said dilatation balloon; a plurality of influent perfusion ports disposed upstream from the proximal end of said dilatation balloon, said influent perfusion ports opening into said perfusion conduit to enable blood from said artery to enter said perfusion conduit; and at least one effluent perfusion pot disposed downstream from the distal end of said dilatation balloon to conduct blood from said perfusion conduit back into said artery and maintain a steady flow of blood past said dilatation balloon during the dilatation process.
Claim 19
Dependent Claim
195 words
A catheter for dilatation of an obstructed artery while maintaining a steady flow of blood past the obstruction, comprising: an axially elongate catheter shaft, constructed and arranged for insertion into a body lumen, said catheter shaft having a perfusion conduit and a separate guide wire conduit extending axially therethrough, wherein the guide wire conduit extends co-axially through and within said perfusion conduit; a dilatation balloon, secured to said catheter shaft, said dilatation balloon having a proximal end and a distal end; an inflation lumen adjacent at least one of said guide wire conduit and said perfusion conduit, said inflation lumen in fluid communication with said dilatation balloon for selective inflation and deflation of said dilatation balloon; a plurality of influent perfusion ports disposed upstream from the proximal end of said dilatation balloon, said influent perfusion ports opening into said perfusion conduit to enable blood from said artery to enter said perfusion conduit; and at least one effluent perfusion pot disposed downstream from the distal end of said dilatation balloon to conduct blood from said perfusion conduit back into said artery and maintain a steady flow of blood past said dilatation balloon during the dilatation process.
Claim 20
Dependent Claim
229 words
A dilatation catheter for relieving an obstructed coronary artery while maintaining a steady flow of blood past the obstruction, comprising: an axially elongate catheter shaft; a guide wire conduit in said catheter shaft adapted to receive a guide wire; a dilatation balloon, secured to said catheter shaft, said dilatation balloon having a proximal end and a distal end; an inflation lumen in said catheter shaft for transmitting pressurized fluid into and out of said dilatation balloon, for selective inflation and deflation thereof; a perfusion conduit in said catheter shaft for providing a path through which blood may bypass said dilatation balloon when said balloon is in an inflated state and occluding said artery, said perfusion conduit separate from said guide wire conduit and extending along at least a portion of the guide wire conduit, obviating the need to withdraw said guide wire to allow blood to bypass said dilatation balloon; a plurality of influent perfusion ports disposed proximate to the proximal end of said dilatation balloon, said influent ports opening into said perfusion conduit so as to enable blood to enter said perfusion conduit; and at least one effluent perfusion port disposed proximal to said distal end of said dilatation balloon so as to conduct blood from said perfusion conduit back into said artery and maintain a steady flow of blood past said dilatation balloon during the dilatation process.
Claim 21
Dependent Claim
229 words
A dilatation catheter for relieving an obstructed coronary artery while maintaining a steady flow of blood past the obstruction, comprising: an axially elongate catheter shaft; a guide wire conduit in said catheter shaft adapted to receive a guide wire; a dilatation balloon, secured to said catheter shaft, said dilatation balloon having a proximal end and a distal end; an inflation lumen in said catheter shaft for transmitting pressurized fluid into and out of said dilatation balloon, for selective inflation and deflation thereof; a perfusion conduit in said catheter shaft for providing a path through which blood may bypass said dilatation balloon when said balloon is in an inflated state and occluding said artery, said perfusion conduit separate from said guide wire conduit and extending along at least a portion of the guide wire conduit, obviating the need to withdraw said guide wire to allow blood to bypass said dilatation balloon; a plurality of influent perfusion ports disposed proximate to the proximal end of said dilatation balloon, said influent ports opening into said perfusion conduit so as to enable blood to enter said perfusion conduit; and at least one effluent perfusion port disposed proximal to said distal end of said dilatation balloon so as to conduct blood from said perfusion conduit back into said artery and maintain a steady flow of blood past said dilatation balloon during the dilatation process.
References Cited (Backward Citations)
US2930377A
Cited
US3045677A
Cited
US3173418A
Cited
US3448739A
Cited
US3889686A
Cited
US4040413A
Cited
US4233983A
Cited
US4329993A
Cited
US4328056A
Cited
US4338930A
Cited
US4608984A
Cited
US4403612A
Cited
US4461280A
Cited
US4467790A
Cited
US4423725A
Cited
WO1983003766A1
Cited
US4527549A
Cited
US4644936A
Cited
US4563181A
Cited
US4581017B1
Cited
US4581017A
Cited
US4546759A
Cited
US4547193A
Cited
US4762129A
Cited
US4762129B1
Cited
US4689040A
Cited
US4738666A
Cited
EP0214721A1
Cited
US4822345A
Cited
US4763654A
Cited
US4744366A
Cited
US4988356A
Cited
US4826480A
Cited
US4784639A
Cited
US4909252A
Cited
US4877031A
Cited
US4983167A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-11-03 | 1996-05-04 | 1996-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-03 | 2000-05-04 | 2000-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-03 | 2004-05-04 | 2004-11-03 | $7700.00 | Window Closed / Lapsed |