US5536250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perfusion shunt device and method
Assignee: LocalMed Inc
•
Filing: 1994-09-13
•
Granted: 1996-07-16
•
Expires: 2014-09-13
Abstract
Abstract A perfusion shunt device is used in conjunction with balloon catheters to provide blood perfusion across an inflated balloon in a blood vessel. The perfusion shunt device comprises a flexible conduit structure having one or more blood perfusion paths formed from a proximal end to a distal end thereof. The flexible conduit structure is usually attached directly or indirectly to a proximal shaft structure. Discrete anchors or expansible sleeves or cages are provided for locating the conduit structure over the balloon on the catheter. The flexible conduit structure will not be directly attached to the balloon, but rather will be secured at locations distal to an proximal of the balloon. In this way, constriction and distortion of the conduit structure and/or balloon resulting from balloon expansion are minimized. The device may be loaded over a conventional angioplasty balloon catheter within or outside of the blood vessel being treated, either before or after an angioplasty procedure.
Inventors
- 👤 Enrique J. Klein
- 👤 Paul M. Goeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:01
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/104; A61M25/0021; A61M25/0023; A61M2025/0025; A61M25/0043; A61M2025/0063; A61M25/01; A61M2025/0183; A61M25/1002; A61M2025/1004; A61M2025/1043; A61M2025/105; A61M2025/1072; A61M2025/1079; A61M2025/1081; A61M2025/1095
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
82 words
A perfusion shunt device comprising: a flexible conduit structure having a proximal end, a distal end, and a blood perfusion path extending axially over at least a portion of the conduit structure; a proximal shaft structure extending proximally from the conduit structure; and means attached to the conduit structure for securing the conduit structure to a catheter at locations proximal of and distal to an expansible balloon on the catheter, wherein the flexible conduit structure is not directly secured over the balloon.
Claim 2
Dependent Claim
82 words
A perfusion shunt device comprising: a flexible conduit structure having a proximal end, a distal end, and a blood perfusion path extending axially over at least a portion of the conduit structure; a proximal shaft structure extending proximally from the conduit structure; and means attached to the conduit structure for securing the conduit structure to a catheter at locations proximal of and distal to an expansible balloon on the catheter, wherein the flexible conduit structure is not directly secured over the balloon.
Claim 3
Dependent Claim
41 words
A device as in claim 1, wherein the blood perfusion path comprises at least one lumen extending through the conduit structure, wherein the lumen has a plurality of axially spaced-apart ports which permit blood perfusion into the out of the lumen.
Claim 4
Dependent Claim
27 words
A device as in claim 2, wherein the blood perfusion path comprises a pair of axial lumens, each of which has a plurality of axially spaced-apart ports.
Claim 5
Dependent Claim
26 words
A device as in claim 1, wherein the blood perfusion path comprises at least one axial channel formed in an exterior surface of the conduit structure.
Claim 6
Dependent Claim
24 words
A device as in claim 1, wherein the shaft structure comprises a rod attached directly to the proximal end of the flexible conduit structure.
Claim 7
Dependent Claim
22 words
A device as in claim 1, wherein the shaft structure comprises a tubular sleeve having a proximal end and a distal end.
Claim 8
Dependent Claim
27 words
A device as in claim 6, wherein a distal portion of the tubular sleeve is axially split to allow for radial expansion and comprises the balloon-securing means.
Claim 9
Dependent Claim
33 words
A device as in claim 1, wherein the balloon-attaching means comprises an anchor disposed near the distal end of the conduit structure, which anchor captures a distal end of an angioplasty balloon catheter.
Claim 10
Dependent Claim
44 words
A device as in claim 8, wherein the single anchor is a distal end piece having a receptacle open in a proximal direction for receiving the distal end of the angioplasty balloon catheter, wherein said receptacle is radially offset from the flexible conduit structure.
Claim 11
Dependent Claim
33 words
A device as in claim 8, wherein the conduit-securing means comprises at least one additional anchor disposed on the conduit structure, which additional anchor(s) capture the angioplasty balloon catheter proximally of the balloon.
Claim 12
Dependent Claim
43 words
A device as in claim 1, wherein the conduit-securing means comprises an expansible cage which receives the balloon and which is attached to the flexible conduit structure only at locations distal and proximal to a portion of the cage which receives the balloon.
Claim 13
Dependent Claim
15 words
A device as in claim 11, wherein the expansible cage comprises an axially split tube.
Claim 14
Dependent Claim
14 words
A device as in claim 11, wherein the expansible cage comprises an elastomeric tube.
Claim 15
Dependent Claim
14 words
A device as in claim 11, wherein the expansible cage comprises a mesh structure.
Claim 16
Dependent Claim
18 words
A device as in claim 11, wherein the expansible cage comprises a pouch composed of a non-compliant material.
Claim 17
Dependent Claim
17 words
A device as in claim 11, wherein a proximal extension of the expansible cage comprises the shaft.
Claim 18
Independent Claim
95 words
A method for perfusing blood past a treatment site within a blood vessel, said method comprising: providing a flexible conduit structure having a blood perfusion path extending axially over at least a portion thereof; positioning the flexible conduit over an expansible balloon on a vascular catheter, wherein the conduit is attached to the catheter at locations distal of an proximal to the expansible balloon but is not directly attached to the balloon; and expanding the balloon at the treatment site within the blood vessel, wherein blood flows through the perfusion path past the expanded balloon.
Claim 19
Independent Claim
95 words
A method for perfusing blood past a treatment site within a blood vessel, said method comprising: providing a flexible conduit structure having a blood perfusion path extending axially over at least a portion thereof; positioning the flexible conduit over an expansible balloon on a vascular catheter, wherein the conduit is attached to the catheter at locations distal of an proximal to the expansible balloon but is not directly attached to the balloon; and expanding the balloon at the treatment site within the blood vessel, wherein blood flows through the perfusion path past the expanded balloon.
Claim 20
Dependent Claim
52 words
A method as in claim 17, wherein the flexible conduit is attached by a first anchor disposed at a distal end of the flexible conduit which is placed over a distal end of the balloon catheter and at least one additional anchor which is placed over a proximal portion of the catheter.
Claim 21
Dependent Claim
46 words
A method as in claim 17, wherein the flexible conduit is attached by an expansible cage which receives the expansible balloon and which is attached to the flexible conduit structure only at locations distal and proximal to a portion of the cage which receives the balloon.
Claim 22
Dependent Claim
25 words
A method as in claim 17, wherein flexible conduit is positioned over the expansible balloon while the vascular catheter is withdrawn from the blood vessel.
Claim 23
Dependent Claim
26 words
A method as in claim 17, wherein the flexible conduit is positioned over the expansible balloon while the vascular catheter is disposed within the blood vessel.
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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) | 1999-07-16 | 2000-01-15 | 2000-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-16 | 2004-01-15 | 2004-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-16 | 2008-01-15 | 2008-07-16 | $7700.00 | Window Closed / Lapsed |