US4413989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expandable occlusion apparatus
Assignee: Schneider USA Inc
•
Filing: 1981-08-17
•
Granted: 1983-11-08
•
Expires: 2001-08-17
Abstract
Abstract A catheter assembly or catheter attachment for use in treatment of coronary artery disease resulting from atheromatous lesions whereby stenotic lesions can be dilated without interruption to the blood supply distal to the stenotic lesion being treated, the catheter further allowing blood pressure distal to the site to be measured throughout the treatment procedure. In one form of the invention, the catheter assembly comprises first and second coaxial telescoping tubes, the outer tube having a pattern of perforations through its side wall proximate the distal end thereof and an inelastic expander member sealed to its outer surface at spaced apart locations so as to span the pattern of perforations. The patient's own blood may be perfused through the lumen of the outer tube between the outer surface of the inner tube and the inner surface of the outer tube and through the pattern of perforations to uniformly expand the inelastic expander member. The inner and outer tubes are tapered at their distal ends so as to facilitate insertion of the catheter assembly through a blood vessel and, by relative longitudinal displacement of the inner tube with respect to the outer tube, the pressure and rate of flow of blood from the open distal end of the catheter can be controlled from its proximal end. In an alternative arrangement, the inner tube is replaced with a cylindrical wire of a predetermined diameter less than the inner diameter of said outer tube. Further, the distal end portion of the outer tube may be made distensible so that it can be made to expand by applying a suitable pressure at the proximal end of the catheter, and the catheter may be provided with a highly flexible guidance pigtail for facilitating the insertions of the instrument into a blood vessel, without interfering with the expanding and perfusing functions of the instrument.
Inventors
- 👤 Gilmore T. Schjeldahl
- 👤 B. Sharma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:14
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/1027; A61M25/1029; A61M25/1002; A61M25/104; A61M25/01; A61M2025/0175; A61M2025/1043; A61M2025/1093
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
151 words
A catheter attachment for facilitating coronary transluminal angioplasty/coronary perfusion procedures, comprising: (a) an elongated outer tubular member having at least one perforation proximate the distal end thereof; (b) a generally non-elastic, hollow, expander member surrounding said outer tubular member proximate said distal end and sealingly connected to said outer tubular member at longitudinally spaced apart locations on either side of said perforation; and (c) an elongated inner tubular member of a predetermined diameter less than the inner diameter of said outer tubular member and disposed within the lumen of said outer tubular member and extending from the proximal end thereof beyond the distal end thereof, the arrangement being such that a fluid introduced at said proximal end of said outer tubular member perfuses between said outer and inner tubular members, through said perforation to fill the volume of said expander member and out the distal end of said outer tubular member.
Claim 2
Dependent Claim
151 words
A catheter attachment for facilitating coronary transluminal angioplasty/coronary perfusion procedures, comprising: (a) an elongated outer tubular member having at least one perforation proximate the distal end thereof; (b) a generally non-elastic, hollow, expander member surrounding said outer tubular member proximate said distal end and sealingly connected to said outer tubular member at longitudinally spaced apart locations on either side of said perforation; and (c) an elongated inner tubular member of a predetermined diameter less than the inner diameter of said outer tubular member and disposed within the lumen of said outer tubular member and extending from the proximal end thereof beyond the distal end thereof, the arrangement being such that a fluid introduced at said proximal end of said outer tubular member perfuses between said outer and inner tubular members, through said perforation to fill the volume of said expander member and out the distal end of said outer tubular member.
Claim 3
Dependent Claim
25 words
The catheter attachment as in claim 1 wherein said outer tubular member tapers to a lesser diameter a predetermined distance proximal the distal end thereof.
Claim 4
Dependent Claim
42 words
The catheter attachment as in claim 2 wherein said elongated outer tubular member has an outer diameter generally in the range of from 0.5 to 5 millimeters and wherein said lesser diameter is in the range of from 0.025 to 5.0 millimeters.
Claim 5
Dependent Claim
35 words
The catheter attachment as in claim 1 wherein said inner tubular member tapers to a lesser diameter from a predetermined distance proximal said distal end of said inner tubular member to said distal end thereof.
Claim 6
Dependent Claim
34 words
The catheter as in claim 4 wherein said inner tubular member is longitudinally displaceable within the lumen of said outer tubular member from a location near said proximal end of said outer tubular member.
Claim 7
Dependent Claim
43 words
The catheter attachment as in claim 5 wherein the longitudinal displacement of said inner tubular member within the lumen of said outer tubular member controls the perfusion rate of fluid therebetween and the pressure acting on the wall surface of said expander member.
Claim 8
Dependent Claim
42 words
The catheter attachment as in claim 4 wherein said elongated inner tubular member has an outer diameter generally in the range of from 0.2 to 3.0 millimeters and wherein said lesser diameter is in the range of from 0.16 to 2.4 millimeters.
Claim 9
Dependent Claim
50 words
Apparatus as in claim 1 wherein said non-elastic expander member comprises a longitudinally extending thin, flexible, tubular element formed from a biaxially oriented synthetic plastic material surrounding said outer tubular member with opposed ends thereof secured to said outer tubular member at spaced apart locations proximate said distal end thereof.
Claim 10
Dependent Claim
12 words
Apparatus as in claim 8 wherein said synthetic plastic material is polypropylene.
Claim 11
Dependent Claim
37 words
The catheter attachment as in claim 8 wherein said expander member, when expanded, has a continuous taper from a relatively large diameter middle zone thereof to a lesser diameter at said opposed ends of said expander member.
Claim 12
Dependent Claim
56 words
The catheter attachment as in claim 10 wherein said relatively large diameter of said middle zone of expander member is in the range of from 1.0 to 30.0 millimeters and wherein the length of said expander member between said sealed connections to said outer tubular member is in the range of from 5 to 100 millimeters.
Claim 13
Dependent Claim
34 words
The catheter attachment as in claim 8 wherein said expander member, when expanded, tapers continuously from an enlarged cross-sectional dimension inward of said distal end to a lesser cross-sectional dimension proximate said distal end.
Claim 14
Dependent Claim
23 words
The catheter attachment as in claim 8 wherein said expander member and said outer tubular member surrounded thereby form a generally smooth curve.
Claim 15
Dependent Claim
31 words
The catheter attachment as in claim 8 wherein said expander member, when expanded, has a continuous taper from a relatively large diameter proximal end toward a relatively small diameter distal end.
Claim 16
Dependent Claim
19 words
The catheter attachment as in claim 8 wherein said expander member, when expanded, includes at least two bifurcated branches.
Claim 17
Dependent Claim
28 words
The catheter attachment as in claim 8 wherein said expander member, when expanded, imparts a curve to portion of said outer tubular member surrounded by said expander member.
Claim 18
Dependent Claim
30 words
The catheter attachment as in claim 1 wherein said outer and said inner tubular members are formed from synthetic plastic materials selected from the class including polyurethane, polyvinylchloride and polyethylene.
Claim 19
Dependent Claim
50 words
The catheter attachment as in claim 1 and further including a predetermined length of wire reinforced high-torque tubing attached to the proximal end of said outer tubular member for facilitating the application of twisting forces to said outer tubular member during the insertion of said catheter through a blood vessel.
Claim 20
Dependent Claim
24 words
The catheter attachment as in claim 1 and further including a radiopaque coating on the inside surface of said generally non-elastic, hollow, expander member.
Claim 21
Dependent Claim
153 words
A catheter attachment for facilitating coronary transluminal angioplasty/coronary perfusion procedures, comprising: (a) an enlongated expander mounting tube having at least one perforation proximate the distal end thereof; (b) a generally non-elastic, hollow, expander member surrounding said elongated expander member proximate said distal end and sealingly connected to said expander mounting tube at longitudinally spaced apart locations on either side of said perforation; and (c) an elongated generally cylindrical member of a predetermined diameter less than the inner diameter of said expander mounting tube and disposed within the lumen of said expander mounting tube and extending from the proximal end thereof beyond the distal end thereof, the arrangement being such that a fluid introduced at said proximal end of said expander mounting tube perfuses between said expander mounting tube and said cylindrical member, through said perforation to fill the volume of said expander member and out the distal end of said expander mounting tube.
Claim 22
Dependent Claim
153 words
A catheter attachment for facilitating coronary transluminal angioplasty/coronary perfusion procedures, comprising: (a) an enlongated expander mounting tube having at least one perforation proximate the distal end thereof; (b) a generally non-elastic, hollow, expander member surrounding said elongated expander member proximate said distal end and sealingly connected to said expander mounting tube at longitudinally spaced apart locations on either side of said perforation; and (c) an elongated generally cylindrical member of a predetermined diameter less than the inner diameter of said expander mounting tube and disposed within the lumen of said expander mounting tube and extending from the proximal end thereof beyond the distal end thereof, the arrangement being such that a fluid introduced at said proximal end of said expander mounting tube perfuses between said expander mounting tube and said cylindrical member, through said perforation to fill the volume of said expander member and out the distal end of said expander mounting tube.
Claim 23
Dependent Claim
17 words
The catheter attachment as in claim 20 wherein said cylindrical member comprises a generally solid, flexible wire.
Claim 24
Dependent Claim
16 words
The catheter attachment as in claim 20 wherein said elongated cylindrical member has a tubular cross-section.
Claim 25
Dependent Claim
20 words
The catheter attachment as in claim 20 wherein said expander mounting tube is formed from a soft, distensible, plastic material.
Claim 26
Dependent Claim
31 words
The catheter attachment as in claim 23 wherein the portion of said expander member sealingly connected to said expander mounting tube on the distal side of said perforation is generally non-distensible.
Claim 27
Dependent Claim
23 words
The catheter attachment as in claim 24 and further including a high-torque tube secured to the proximal end of said expander mounting tube.
Claim 28
Dependent Claim
148 words
A catheter attachment for use in treatment of coronary artery disease, comprising: (a) an outer tubular member formed from a distensible, soft plastic material and having a central lumen a distal end and a proximal end and a relatively expandable segment formed thereon displaced a predetermined distance proximal of said distal end; and (b) an elongated generally cylindrical member of a predetermined diameter less than or equal to the inner diameter of said outer tubular member and disposed within the central lumen of said outer tubular member and extending from said proximal end thereof beyond said distal end thereof, the arrangement being such that a fluid introduced at said proximal end of said outer tubular member perfuses between said outer tubular member and said elongated generally cylindrical member to distend said relatively expandable segment to a desired diameter and out said distal end of said outer tubular member.
Claim 29
Dependent Claim
148 words
A catheter attachment for use in treatment of coronary artery disease, comprising: (a) an outer tubular member formed from a distensible, soft plastic material and having a central lumen a distal end and a proximal end and a relatively expandable segment formed thereon displaced a predetermined distance proximal of said distal end; and (b) an elongated generally cylindrical member of a predetermined diameter less than or equal to the inner diameter of said outer tubular member and disposed within the central lumen of said outer tubular member and extending from said proximal end thereof beyond said distal end thereof, the arrangement being such that a fluid introduced at said proximal end of said outer tubular member perfuses between said outer tubular member and said elongated generally cylindrical member to distend said relatively expandable segment to a desired diameter and out said distal end of said outer tubular member.
Claim 30
Dependent Claim
19 words
The catheter attachment as in claim 26 wherein said expandable segment is integrally formed in said outer tubular member.
Claim 31
Dependent Claim
20 words
The catheter attachment as in claim 27 wherein said elongated generally cylindrical member is a generally solid, flexible, wire member.
Claim 32
Dependent Claim
38 words
The catheter attachment as in claim 27 wherein said outer tubular member has a predetermined distensibility less than the distensibility of said relatively expandable segment in the portion of said outer tubular member distal of said expandable segment.
Claim 33
Dependent Claim
27 words
The catheter attachment as in claim 29 and further including a high-torque tube of a predetermined diameter secured to said proximal end of said outer tubular member.
Claim 34
Dependent Claim
93 words
A catheter comprising, in combination: (a) a first, tubular member having an open end; (b) a second member of smaller diameter slidable within said first member to define a lumen between the inner wall of the first member and the outer wall of the second member; (c) valving means carried by said second member near one end thereof for engaging the second end of said first member and preventing access to said lumen lumenn; (d) and flexible guide means extending from the last named means in a direction away from said first member.
Claim 35
Dependent Claim
93 words
A catheter comprising, in combination: (a) a first, tubular member having an open end; (b) a second member of smaller diameter slidable within said first member to define a lumen between the inner wall of the first member and the outer wall of the second member; (c) valving means carried by said second member near one end thereof for engaging the second end of said first member and preventing access to said lumen lumenn; (d) and flexible guide means extending from the last named means in a direction away from said first member.
Claim 36
Dependent Claim
52 words
A catheter according to claim 31 in which said second member is tubular and said valve means comprises an enlargement on the end thereof, and in which a side port is provided in said second member near said enlargement for enabling communication between said lumen and the interior of said second member.
Claim 37
Dependent Claim
45 words
A catheter according to claim 31 in which said second member is tubular and said guide means includes a central core having a generally spherical enlargement near one end to be received in said second member and enlarging the same to comprise said valving means.
References Cited (Backward Citations)
US2845930A
Cited
US3833003A
Cited
US3902492A
Cited
US4024873A
Cited
US4024873B1
Cited
US4141364A
Cited
US4276874A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |