Transport pump and organ stabilization apparatus including related methods

• US 6,976,996 B1
• Filed: 10/14/1997
• Issued: 12/20/2005
• 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 N
• Primary Examiner(s): SNOW, BRUCE EDWARD
• Application Number:
  US09/462,656
• Time in Patent Office: 2,989 Days
• Field of Search: 623/3.1, 623/3.13, 623/3.15, 623/3.24, 623/3.26, 623/3.18, 623/3.25, 600/17, 600/16, 415/900, 415/38, 415/149.3, 415/224, 415/225, 417/168, 417/172, 417/423.1
• US Class Current: 623/3.13
• 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 surgical pump suitable for bodily fluids, normally blood, usable in the course of surgical interventions as an alternative to the traditional CPB (cardio pulmonary bypass) making use of external blood pumps. It consists of an intake cannula (20) which is inserted with its first (distal) end in a first vessel, an outflow cannula (30) coaxial for some length with, and larger than the first cannula, which is inserted with its first (distal) end in a second vessel, both second ends of the coaxial cannulas being connected with a pump housing (52) having an inlet (62) for the inner cannula and outflow windows (64) for the outer cannula, a rotor impeller (70) housed in the housing and connected with an electric motor (80) rotating coaxially below the pump housing, the housing having inner (56) and outer (59) passageways which allow inflow, change of flow direction (reversal) and outflow of the fluid, thus producing two coaxial counter flowing flows in the coaxial cannulas. The pump can be used making use of a single portal. Inflatable balloons can be used to stabilize the cannulas in situ and to stabilize the walls of the organs or vessels where the cannulas are inserted.

Claims

1. A pump for transporting body fluids comprising

a pump housing having an outer wall;

a rotor positioned for rotation within the pump housing; and

inner walls within the pump housing that surround at least a portion of the rotor defining an inner region forming a first passageway between the rotor and the inner walls and further defining an outer region forming a second passageway between the outer wall and the inner walls in fluid communication with the first passageway,

the first passageway permitting fluid flow into the pump in a first direction and the second passageway permitting fluid flow output from the pump in the reverse direction, the rotor directing fluid from the first passageway into the second passageway to exit the pump through the second passageway.

2. The pump for transporting bodily fluids as recited in claim 1

wherein the inner region and the pump housing are substantially cylindrical.

3. The pump for transporting bodily fluids as recited in claim 1

wherein the pump is a centrifugal pump.

4. The pump for transporting bodily fluids as recited in claim 1

wherein the interior walls substantially surround the rotor.

5. The pump for transporting bodily fluids as recited in claim 4

wherein the pump is an axial pump.

6. The pump for transporting bodily fluids as recited in claim 1

wherein the first passageway is coaxial with the inner walls.

7. The pump for transporting bodily fluids as recited in claim 1

wherein the second passageway is coaxial with the outer walls.