US4804365A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vascular cannulae for transfemoral cardiopulmonary bypass and method of use
Assignee: CR Bard Inc
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Filing: 1987-02-13
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Granted: 1989-02-14
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Expires: 2007-02-13
Abstract
Abstract A cannula assembly suitable for rapid, closed-chest cannulation of the cardiopulmonary system to an extracorporeal bypass machine through punctures in the femoral veins and arteries is disclosed. The assembly comprises a conduit made of a smooth, flexible, thin-walled material and capable of longitudinal insertion through these vessels by use of an associated "introducer" and conventional guide wire. The conduit has adequate hemodynamic flow capacity and sufficient unsupported hoop strength to resist collapse from suctional and vasoconstrictive forces during use.
Inventors
- 👤 Ken Litzie
- 👤 Craig P. Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:55
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
269 words
A cardiopulmonary bypass system for rapid, closed-chest, cardiopulmonary cannulation during a cardiopulmonary bypass procedure, comprising: a first smooth, elongated, flexible, open-ended, thin-walled conduit having proximal and distal ends, a perforated portion adjacent said distal end, and having an outer diameter sufficiently small to permit said conduit to be inserted through a puncture in a femoral vein and advanced through said vein, and an inner diameter selected such that the hemodynamic flow of blood through the first conduit during use is approximately 2.2 lit./min./m 2 of body surface area; first flexible introducer means for inserting and guiding said first conduit through said puncture and coaxially through said vein, and for obturating said conduit during insertion thereof; first connector means joined to said first conduit adjacent said proximal end for connecting said proximal end of said conduit to an extracorporeal cardiopulmonary bypass system; a second smooth, elongated, flexible, open-ended, thinwalled conduit having proximal and distal ends, a perforated portion adjacent said distal end, and an outer diameter sufficiently small to permit said second conduit to be inserted through a puncture in a femoral artery and advanced through said artery, and an inner diameter selected such that the hemodynamic flow of blood through the second conduit during use is approximately 2.2 lit./min./m 2 of body surface area; second flexible introducer means for inserting and guiding said second conduit through said puncture and coaxially through said artery, and for obturating said conduit during insertion thereof; and second connector means joined to said second conduit adjacent said proximal end for connecting said proximal end of said second conduit to an extracorporeal cardiopulmonary bypass system.
Claim 2
Dependent Claim
269 words
A cardiopulmonary bypass system for rapid, closed-chest, cardiopulmonary cannulation during a cardiopulmonary bypass procedure, comprising: a first smooth, elongated, flexible, open-ended, thin-walled conduit having proximal and distal ends, a perforated portion adjacent said distal end, and having an outer diameter sufficiently small to permit said conduit to be inserted through a puncture in a femoral vein and advanced through said vein, and an inner diameter selected such that the hemodynamic flow of blood through the first conduit during use is approximately 2.2 lit./min./m 2 of body surface area; first flexible introducer means for inserting and guiding said first conduit through said puncture and coaxially through said vein, and for obturating said conduit during insertion thereof; first connector means joined to said first conduit adjacent said proximal end for connecting said proximal end of said conduit to an extracorporeal cardiopulmonary bypass system; a second smooth, elongated, flexible, open-ended, thinwalled conduit having proximal and distal ends, a perforated portion adjacent said distal end, and an outer diameter sufficiently small to permit said second conduit to be inserted through a puncture in a femoral artery and advanced through said artery, and an inner diameter selected such that the hemodynamic flow of blood through the second conduit during use is approximately 2.2 lit./min./m 2 of body surface area; second flexible introducer means for inserting and guiding said second conduit through said puncture and coaxially through said artery, and for obturating said conduit during insertion thereof; and second connector means joined to said second conduit adjacent said proximal end for connecting said proximal end of said second conduit to an extracorporeal cardiopulmonary bypass system.
Claim 3
Dependent Claim
15 words
The sytem of claim 1, wherein said first and second conduits are made of polytetrafloroethylene.
Claim 4
Dependent Claim
34 words
The system of claim 1, wherein said first and second conduits each have an outside diameter of from about 6.3 to 7.0 mm and a wall thickness of from about 0.35 to 0.40 mm.
Claim 5
Dependent Claim
39 words
The system of claim 1 wherein said first and second conduits have a hoop strength sufficient to permit a hemodynamic flow of approximately 2.2 lit./min/m 2 of body surface area through each of said conduits during use without collapse.
Claim 6
Dependent Claim
41 words
The system of claim 1, wherein said first conduit is of a length sufficient to permit said first conduit to extend from said puncture site in the femoral vein to the junction of the superior vena cava and the right atrium.
Claim 7
Dependent Claim
39 words
The system of claim 1, wherein said second conduit is of a length sufficent to permit said second conduit to extend from said puncture site in the femoral artery to a site in the proximal femoral or iliac artery.
Claim 8
Dependent Claim
15 words
The system of claim 1, further including means for clamping said first and second conduits.
Claim 9
Dependent Claim
34 words
The system of claim 1, further comprising: marker means disposed on each of said first and second conduits and movable longitudinally for marking the length of insertion of each of conduits through said vessels.
Claim 10
Dependent Claim
18 words
The system of claim 1 wherein said first and second connector means are made of a clear material.
Claim 11
Dependent Claim
29 words
The system of claim 1 further including: guidewire means for introducing said first and second conduits and said first and second introducer means into an associated vein or artery.
Claim 12
Dependent Claim
30 words
The assembly of claim 10, wherein said first conduit has an outside diameter of from about 6.3 to 7.0 mm, and a wall thickness from about 0.35 to 0.40 mm.
Claim 13
Independent Claim
121 words
A method for rapid, closed-chest, vascular cannulation of a patient's cardiopulmonary system, comprising the steps of: advancing a guide wire through a puncture site in a patient's upper femoral vein or artery and into a predetermined region of said patient; sliding an in-line conduit and flexible introducer assembly coaxially over said guide wire, through said puncture site and said vein or artery to said predetermined location in said patient, said conduit having a wall thickness of from about 0.35 to 0.40 mm; removing said guide wire and said introducer, thereby placing said conduit at said predetermined location; and flowing a body fluid through the conduit at a rate of approximately 2.0 to 2.2 lit./min/m 2 of said patient's body surface area.
Claim 14
Independent Claim
121 words
A method for rapid, closed-chest, vascular cannulation of a patient's cardiopulmonary system, comprising the steps of: advancing a guide wire through a puncture site in a patient's upper femoral vein or artery and into a predetermined region of said patient; sliding an in-line conduit and flexible introducer assembly coaxially over said guide wire, through said puncture site and said vein or artery to said predetermined location in said patient, said conduit having a wall thickness of from about 0.35 to 0.40 mm; removing said guide wire and said introducer, thereby placing said conduit at said predetermined location; and flowing a body fluid through the conduit at a rate of approximately 2.0 to 2.2 lit./min/m 2 of said patient's body surface area.
References Cited (Backward Citations)
US3565074A
Cited
US3788328A
Cited
US4531935A
Cited
US4661094A
Cited
US4670008A
Cited
US4650472A
Cited
US4701160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-14 | 1992-08-15 | 1993-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-14 | 1996-08-15 | 1997-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-14 | 2000-08-15 | 2001-02-14 | $7700.00 | Window Closed / Lapsed |