Patent US4451137A successfully refreshed from Google Patents.
Patent US5158540A successfully refreshed from Google Patents.
US5158540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perfusion catheter
Assignee: Boston Scientific Scimed Inc
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Filing: 1990-05-22
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Granted: 1992-10-27
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Expires: 2010-05-22
Abstract
Abstract A low-profile angioplasty catheter is disclosed which is insertable through a guiding catheter. The angioplasty catheter has two balloons. The distal balloon dilates the stenosis. The proximal balloon is separately inflatable and selectively closes the annular passage between the angioplasty catheter and the guiding catheter. The angioplasty catheter has a central lumen with a series of openings allowing fluid communication from the central lumen into the annular passage proximally of the balloon which seals the annular passage. While the first balloon is inflated to dilate the stenosis, blood can be withdrawn from an arterial source through a lumen (or plurality thereof) in the guiding catheter and pumped into the annular passage between the angioplasty catheter and the guiding catheter. The blood then passes through the openings proximal to the proximal balloon into the central lumen of the PTCA catheter and flows beyond the distal tip of the angioplasty catheter to maintain circulation of the patient's blood at a point distal of the stenosis.
Inventors
- 👤 Bandula Wijay
- 👤 Paolo Angelini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:12
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/104; A61M25/0043; A61M25/0054; A61M25/1002; A61M2025/0004; A61M2025/0006; A61M2025/1043; A61M2025/1059; A61M2025/1079; A61M2025/1093; A61M25/0067; A61M25/0068; A61M25/0071
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
266 words
An apparatus for perfusing blood beyond a blockage created in a patient's circulatory system during catheterization, comprising an elongated catheter having a proximal end and a distal end; at least one first catheter lumen extending through the distal end of said catheter; guide means for guiding said catheter in a vessel, said guide means surrounding at least a portion of said catheter, creating an annular passage therebetween; valve means on said catheter between said proximal and said distal ends thereof for selectively closing said annular passage; said first catheter lumen having flow communication with said annular passage at a point proximal to said valve means; sheath means coaxially surrounding and extending along said guide means for at least a portion of the length of said guide means to a distal end proximally of said valve means; a first sheath means lumen extending through the sheath means to an opening at the distal end of said sheath means, said first sheath means lumen having flow communication with said annular passage adjacent a proximal end of said sheath means; and pump means including a fluid inlet in fluid communication with said first sheath lumen adjacent a proximal end thereof and further including a fluid outlet in fluid communication with said annular passage, for drawing a patient's blood through said distal opening of said sheath lumen during catheterization and, upon selective energization of said valve means, for pumping said drawn blood through said annular passage into said catheter lumen and out said distal end of said catheter lumen to the vascular anatomy of the patient distal to said blockage.
Claim 2
Independent Claim
266 words
An apparatus for perfusing blood beyond a blockage created in a patient's circulatory system during catheterization, comprising an elongated catheter having a proximal end and a distal end; at least one first catheter lumen extending through the distal end of said catheter; guide means for guiding said catheter in a vessel, said guide means surrounding at least a portion of said catheter, creating an annular passage therebetween; valve means on said catheter between said proximal and said distal ends thereof for selectively closing said annular passage; said first catheter lumen having flow communication with said annular passage at a point proximal to said valve means; sheath means coaxially surrounding and extending along said guide means for at least a portion of the length of said guide means to a distal end proximally of said valve means; a first sheath means lumen extending through the sheath means to an opening at the distal end of said sheath means, said first sheath means lumen having flow communication with said annular passage adjacent a proximal end of said sheath means; and pump means including a fluid inlet in fluid communication with said first sheath lumen adjacent a proximal end thereof and further including a fluid outlet in fluid communication with said annular passage, for drawing a patient's blood through said distal opening of said sheath lumen during catheterization and, upon selective energization of said valve means, for pumping said drawn blood through said annular passage into said catheter lumen and out said distal end of said catheter lumen to the vascular anatomy of the patient distal to said blockage.
Claim 3
Dependent Claim
52 words
The apparatus of claim 1 further comprising at least one second channel in said sheath means having a distal opening for fluid communication with a patient's circulatory system during catheterization and a proximal opening to allow continuous measurement of the pressure in the system where the distal opening is disposed during catheterization.
Claim 4
Dependent Claim
46 words
The apparatus of claim 2, wherein said catheter further comprises: expanding means disposed on said catheter distally of said guide means for expanding a passageway in a patient's circulatory system during catheterization, and means for actuating said expanding means from the proximal end of said catheter.
Claim 5
Dependent Claim
80 words
The apparatus of claim 1 wherein said pump means further comprises: a pump body including said fluid inlet; means on said body for elevating pressure of blood passing through said body; and means in flow communication with said body for dampening pulsation of the blood as it emerges from said pump body, said pulsation dampening means having said fluid outlet and further comprising: a housing defining an accumulator cavity therein; and isolating from said cavity blood passing to said outlet.
Claim 6
Dependent Claim
46 words
The apparatus of claim 3, wherein: said valve means is mounted to said catheter proximally of said expanding means; and further comprising means operatively connected to said valve means from said proximal end of said catheter for selectively energizing said valve means from such proximal end.
Claim 7
Dependent Claim
34 words
The apparatus of claim 5, wherein: said guide means is coaxial with said catheter and extends from said proximal end of said catheter, over said valve means and terminates proximally of said expanding means.
Claim 8
Dependent Claim
51 words
The apparatus of claim 6, wherein: said actuating means for said expanding means is a second lumen in said catheter, extending from adjacent its proximal end to said expanding means; and said energizing means is a third lumen in said catheter, extending from adjacent its proximal end to said valve means.
Claim 9
Dependent Claim
56 words
The apparatus of claim 7, wherein: said first catheter lumen is larger in cross-sectional area than said second or third catheter lumens; and further comprising stiffener means disposed in said second or third catheter lumen to stiffen the proximal portion of said catheter; and a removable guidewire selectively extendable through and beyond said first catheter lumen.
Claim 10
Dependent Claim
34 words
The apparatus of claim 7 wherein said expanding and valve means are balloons selectively inflatable independently of each other through said second and third lumens respectively; and said guide means is a guiding catheter.
Claim 11
Dependent Claim
73 words
The apparatus of claim 26, wherein: said annular passage has a cross-sectional area at least 10 times greater than said first catheter lumen; and wherein said pump means in fluid communication with said annular passage is capable of pumping blood at least 60 cc/min. out the distal end of said first catheter lumen when said catheter is about 140 cm long with a developed pressure at said pump means not exceeding 100 psig.
Claim 12
Dependent Claim
236 words
The apparatus of claim 1, wherein said elongated catheter further comprises: an elongated body having a proximal and distal segment, said body defining said first lumen extending therethrough; an elongated tip segment connected adjacent to the distal end of said distal segment of said body, said tip defining at least one substantially smooth bore lumen therethrough, said first lumen in said body in flow communication with said smooth bore lumen in said tip, thereby allowing the catheter to be advanced over a guide extending through said lumen in said body in said tip; said body being made of a harder material than the material of said tip; a balloon mounted in close proximity to the outer surface of said distal segment of said body defining a balloon cavity therebetween, said balloon having a proximal and distal neck, said balloon disposed substantially proximally to said tip, juncture means for providing a transition between said tip and said distal segment of said body, said distal neck of said balloon mounted adjacent to the juncture between said elongated tip segment and said distal end of said distal segment of said body; said proximal neck of said balloon mounted to said elongated body; said distal segment of said body being substantially nondistensible as the balloon is inflated to substantially its full normal operating inflation pressure; and means within said body for selectively inflating and deflating said balloon through said cavity.
Claim 13
Dependent Claim
80 words
The apparatus of claim 10, wherein said pump means further comprises: a pump body including said fluid inlet; means on said body for elevating pressure of blood passing through said body; and means in flow communication with said body for dampening pulsation of the blood as it emerges from said pump body, said pulsation dampening means having said fluid outlet and further comprising a housing defining an accumulator cavity therein; and isolating from said cavity blood passing to said outlet.
Claim 14
Independent Claim
115 words
A method of perfusing blood during balloon angioplasty, comprising: inserting a guiding catheter into a patient; inserting a balloon angioplasty catheter through said guiding catheter; inflating a distal balloon on said angioplasty catheter to perform angioplasty; inflating a proximal balloon to seal between said guiding catheter and said angioplasty catheter, closing off an annular passage therebetween; drawing blood from the patient through a channel in a sheath on the guiding catheter; pumping the blood back into said annular passage up to said proximal balloon; and directing the blood into the angioplasty catheter proximally of said proximal balloon to pump it into a lumen extending distally of said inflated second balloon, to the distal vascular anatomy.
Claim 15
Independent Claim
115 words
A method of perfusing blood during balloon angioplasty, comprising: inserting a guiding catheter into a patient; inserting a balloon angioplasty catheter through said guiding catheter; inflating a distal balloon on said angioplasty catheter to perform angioplasty; inflating a proximal balloon to seal between said guiding catheter and said angioplasty catheter, closing off an annular passage therebetween; drawing blood from the patient through a channel in a sheath on the guiding catheter; pumping the blood back into said annular passage up to said proximal balloon; and directing the blood into the angioplasty catheter proximally of said proximal balloon to pump it into a lumen extending distally of said inflated second balloon, to the distal vascular anatomy.
Claim 16
Independent Claim
368 words
An apparatus for perfusing blood beyond a blockage created in a patient's circulatory system during catheterization, comprising an elongated catheter having a proximal end and a distal end; at least one catheter lumen extending through the distal end of said catheter; guide means for guiding said catheter in said vessel, said guide means coaxially surrounding at least a portion of said catheter, creating an annular passage therebetween; first balloon means on said catheter between said proximal and said distal ends thereof for selectively closing said annular passage, said guide means extending over said first balloon means; second balloon means disposed on said catheter distally of said guide means for expanding a passageway in a patient's circulatory system during catheterization; actuating means for actuating said second balloon means from the proximal end of said catheter, said actuating means including a second lumen in said catheter extending from adjacent its proximal end to said second balloon means; means for selectively energizing said first balloon means from the proximal end of said catheter, said energizing means including a third lumen in the catheter extending from adjacent the proximal end thereof to said first balloon; said first catheter lumen being larger in cross-sectional area than said second or third catheter lumens; sheath means coaxially surrounding and extending along said guide means for at least a portion of the length of said guide means to a distal end proximally of said first balloon means; a first sheath means lumen extending through the sheath means to an opening at the distal end of said sheath means; said catheter lumen having flow communication with said annular passage at a point proximal to said first balloon means; and pump means including a fluid inlet in fluid communication with said first sheath lumen adjacent a proximal end thereof and further including a fluid outlet in fluid communication with said annular passage, for drawing a patient's blood through said distal opening of said sheath lumen during catheterization and, upon selective energization of said valve means, for pumping said drawn blood through said annular passage into said catheter lumen and out said distal end of said catheter lumen to the vascular anatomy of the patient distal to said blockage.
Claim 17
Independent Claim
368 words
An apparatus for perfusing blood beyond a blockage created in a patient's circulatory system during catheterization, comprising an elongated catheter having a proximal end and a distal end; at least one catheter lumen extending through the distal end of said catheter; guide means for guiding said catheter in said vessel, said guide means coaxially surrounding at least a portion of said catheter, creating an annular passage therebetween; first balloon means on said catheter between said proximal and said distal ends thereof for selectively closing said annular passage, said guide means extending over said first balloon means; second balloon means disposed on said catheter distally of said guide means for expanding a passageway in a patient's circulatory system during catheterization; actuating means for actuating said second balloon means from the proximal end of said catheter, said actuating means including a second lumen in said catheter extending from adjacent its proximal end to said second balloon means; means for selectively energizing said first balloon means from the proximal end of said catheter, said energizing means including a third lumen in the catheter extending from adjacent the proximal end thereof to said first balloon; said first catheter lumen being larger in cross-sectional area than said second or third catheter lumens; sheath means coaxially surrounding and extending along said guide means for at least a portion of the length of said guide means to a distal end proximally of said first balloon means; a first sheath means lumen extending through the sheath means to an opening at the distal end of said sheath means; said catheter lumen having flow communication with said annular passage at a point proximal to said first balloon means; and pump means including a fluid inlet in fluid communication with said first sheath lumen adjacent a proximal end thereof and further including a fluid outlet in fluid communication with said annular passage, for drawing a patient's blood through said distal opening of said sheath lumen during catheterization and, upon selective energization of said valve means, for pumping said drawn blood through said annular passage into said catheter lumen and out said distal end of said catheter lumen to the vascular anatomy of the patient distal to said blockage.
Claim 18
Dependent Claim
59 words
The apparatus of claim 14 further comprising at least one second lumen in said sheath means having a distal opening for fluid communication with a patient's circulatory system during catheterization and having a proximal opening to allow continuous measurement of pressure in the patient's circulatory system where the distal opening of said second sheath lumen is disposed during catheterization.
Claim 19
Dependent Claim
80 words
The apparatus of claim 15, wherein said pump means further comprises: a pump body including said fluid inlet; means on said body for elevating pressure of blood passing through said body; and means in flow communication with said body for dampening pulsation of the blood as it emerges from said pump body, said pulsation dampening means having said fluid outlet and further comprising a housing defining an accumulator cavity therein; and isolating from said cavity blood passing to said outlet.
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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) | 1995-10-27 | 1996-04-27 | 1996-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-27 | 2000-04-27 | 2000-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-27 | 2004-04-27 | 2004-10-27 | $7700.00 | Window Closed / Lapsed |