Reverse flow transport pump and organ stabilization apparatus including related methods

• US 6,083,260 A
• Filed: 09/19/1997
• Issued: 07/04/2000
• Est. Priority Date: 07/11/1997
• Status: Expired due to Fees

• Current Assignee: Maquet Cardiovascular LLC (Getinge AB)
• Original Assignee: A-Med Systems, Inc.
• Inventors: Aboul-Hosn, Walid
• Primary Examiner(s): SNOW, BRUCE EDWARD
• Application Number:
  US08/933,566
• Time in Patent Office: 1,019 Days
• Field of Search: 623/3, 600/17, 600/16, 604/43, 604/4, 415/900, 417/168, 417/172
• US Class Current: 623/3.14
• CPC Class Codes: A61M 1/3653 Interfaces between patient blood circulation and extra-corporal blood circuit
• CPC Class Codes: A61M 1/3659 Cannulae pertaining to extracorporeal circulation
• CPC Class Codes: A61M 2205/32 with radio-opaque indicia
• CPC Class Codes: A61M 2205/3334 Measuring or controlling the flow rate
• CPC Class Codes: A61M 60/117 for assisting the heart, e.g. transcutaneous or external ventricular assist devices
• CPC Class Codes: A61M 60/135 inside a blood vessel, e.g. using grafting
• CPC Class Codes: A61M 60/148 in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices
• CPC Class Codes: A61M 60/232 Centrifugal pumps
• CPC Class Codes: A61M 60/237 the blood flow through the rotating member having mainly axial components, e.g. axial flow pumps
• CPC Class Codes: A61M 60/279 Peristaltic pumps, e.g. roller pumps
• CPC Class Codes: A61M 60/35 for specific surgeries, e.g. for Fontan procedure
• CPC Class Codes: A61M 60/414 transmitted by a rotating cable, e.g. for blood pumps mounted on a catheter
• CPC Class Codes: A61M 60/441 generated by an electromotor
• CPC Class Codes: A61M 60/531 using blood pressure data, e.g. from blood pressure sensors
• CPC Class Codes: A61M 60/546 of blood flow, e.g. by adapting rotor speed
• CPC Class Codes: A61M 60/859 Connections therefor
• CPC Class Codes: A61M 60/867 using position detection during deployment, e.g. for blood pumps mounted on and driven through a catheter
• CPC Class Codes: A61M 60/894 Passive valves, i.e. valves actuated by the blood
• CPC Class Codes: Y10S 415/90 Rotary blood pump

Abstract

A reverse flow pump for transporting bodily fluids comprising an outer pump housing formed with concentric inner and outer passageways, a rotatedly fixed rotor positioned within the pump housing, and an interior compartment surrounding at least a portion of the rotor in communication with the inner and outer pump housing passageways. A hubless reverse flow rotor is further provided comprising a central portion formed with a passageway for the directional flow of fluid relative to the rotor in a spaced apart relation to a base portion to permit the reverse flow of fluid relative to the rotor. A reverse flow pump and coaxial lumen system if also provided comprising a pair of concentric conduits formed of different lengths for the directionally opposed transport of fluids including blood within a closed environment such as the heart region wherein the proximal ends of the concentric conduits are substantially aligned with the pump housing to provide continuous flow between the conduits and reversal of fluid flow direction. A stabilization system and related methods for the heart and other bodily organs are further provided that may cooperate with other embodiments of the present invention to maintain circulatory functions while immobilizing surgical sites which may comprise a cannula and an inflatable stabilization balloon for internally supporting a heart or organ wall in cooperation with externally applied surgical instruments.

Claims

1. A pump and coaxial lumen system for transporting bodily fluids, comprising:

a pump housing having generally concentric inner and outer passageways;

a rotor rotatedly disposed within said pump housing in fluid communication and generally axially aligned with the inner passageway for causing a generally reverse fluid flow between said inner and outer passageways; and

first and second generally concentric conduits each having a lumen extending between a proximal end and a distal end, said proximal ends communicatively coupled to said inner and outer passageways, respectively, and said distal ends being separated by a distance.

2. The system as recited in claim 1 wherein said first conduit is an inner cannula and said second conduit is an outer cannula, and wherein said distal end of said outer cannula is adapted to be positioned within a portal formed within a living body.

3. The system as recited in claim 2 wherein the rotor is driven by a driving unit.

4. The system as recited in claim 3 further including an extension body having a lumen in communication with the pump housing and configured to be positioned within a percutaneous opening in the living body.

5. The system as recited in claim 4 wherein the driving unit is positioned within the extension body and arranged such that during use, the driving unit is external to the living body.

6. The system as recited in claim 5 wherein the system further includes a positioning rod and at least one silicon plug for placement of the driving unit within the extension body.

7. The system as recited in claim 1 further comprising at least one inflatable balloon disposed adjacent the inner cannula.

8. The system as recited in claim 7 wherein the balloon is in communication with a transport conduit formed along the inner cannula for inflating the stabilization balloon.

9. The system as recited in claim 7 wherein the inflatable balloon is formed with perforations to permit transmission of fluid through the balloon membrane to the external area surrounding the perforations of the balloon.

10. The system as recited in claim 9 further including a second inflatable balloon formed spaced apart and more proximate relative to the first inflatable balloon.

11. The system as recited in claim 2 wherein the system further includes at least one inflatable occluding balloon adjoining the inner cannula.

12. The system as recited in claim 2 wherein the inner cannula is formed with an orifice.

13. The system as recited in claim 12 wherein the orifice is in communication with an external pressure source.