Guidable intravascular blood pump and related methods

• US 7,731,675 B2
• Filed: 03/15/2006
• Issued: 06/08/2010
• Est. Priority Date: 09/03/1999
• Status: Expired due to Fees

• Current Assignee: Maquet Cardiovascular LLC (Getinge AB)
• Original Assignee: Maquet Cardiovascular LLC (Getinge AB)
• Inventors: Kanz, William R, Aboul-Hosn, Walid N, Baker, Bruce A.
• Primary Examiner(s): Deak; Leslie R.
• Assistant Examiner(s): MARCETICH, ADAM M
• Application Number:
  US11/375,926
• Publication Number:
  US 20060161095A1
• Time in Patent Office: 1,546 Days
• Field of Search: 600/16, 600/18, 604/7, 604/8, 604/9, 604/6.11, 623/3.1, 623/3.13, 623 326- 328, 623/3.3, 415/900
• US Class Current: 604/6.11
• CPC Class Codes: A61M 2025/0177 having external means for receiving guide wires, wires or stiffening members, e.g. loops, clamps or lateral tubes
• CPC Class Codes: A61M 2025/0183 Rapid exchange or monorail catheters
• CPC Class Codes: A61M 2205/3348 Pressure measurement using a water column
• CPC Class Codes: A61M 25/09 Guide wires
• CPC Class Codes: A61M 60/13 by means of a catheter allowing explantation, e.g. catheter pumps temporarily introduced via the vascular system
• 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 60/221 the blood flow through the rotating member having both radial and axial components, e.g. mixed flow 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 60/414 transmitted by a rotating cable, e.g. for blood pumps mounted on a catheter
• CPC Class Codes: A61M 60/422 the force acting on the blood contacting member being electromagnetic, e.g. using canned motor pumps
• CPC Class Codes: A61M 60/523 using blood flow data, e.g. from blood flow transducers
• CPC Class Codes: A61M 60/531 using blood pressure data, e.g. from blood pressure sensors
• CPC Class Codes: A61M 60/825 Contact bearings, e.g. ball-and-cup or pivot bearings
• CPC Class Codes: A61M 60/827 Sealings between moving parts
• CPC Class Codes: A61M 60/829 having a purge fluid supply
• CPC Class Codes: A61M 60/857 Implantable blood tubes
• CPC Class Codes: A61M 60/865 Devices for guiding or inserting pumps or pumping devices into the patient's body
• 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

An improved intravascular blood pump and related methods involving the broad inventive concept of equipping the intravascular blood pump with guiding features such that the intravascular blood pump can be selectively positioned at a predetermined location within the circulatory system of a patient.

Claims

1. An intravascular blood pump system, comprising:

an intravascular blood pump having a cannula releasably coupled thereto, said intravascular blood pump including a rotor, a shroud for receiving said rotor, a biasing member biasing said rotor towards a docking position in which said rotor is received in said shroud, and a drive cable securedly coupled to said rotor for driving said rotor within said shroud;

wherein said system comprises a pump assembly separable from a conduit assembly, said conduit assembly comprising said cannula and said, shroud, and said pump assembly comprising said rotor, said biasing member and said drive cable; and

a central lumen extending through said shroud and said cannula for receiving a guide mechanism therethrough.

2. The system of claim 1, wherein said central lumen further extends through said rotor and said drive cable.

3. The system of claim 2, further comprising a guide mechanism extending though said central lumen.

4. The system of claim 1, further comprising an impeller having a hub, said hub having a central lumen therethrough and a gasket or seal at a distal end portion of said hub, said gasket or seal configured to seal said central lumen through said hub and prevent ingress of blood into an interior of said hub during operation of said blood pump system.

5. The system of claim 1, further comprising a quick-connect coupling provided on said conduit assembly, and a mating quick-connect coupling provided on said pump assembly, said quick-connect coupling and said mating quick-connect coupling being mateable to maintain said rotor and said shroud in said docking position, and releasable to remove and separate said rotor and said shroud from said docking position.

6. An intravascular blood pump system, comprising:

a pump assembly provided independent of and separable from a conduit assembly;

said conduit assembly comprising a cannula coupled to a shroud;

said pump assembly comprising a rotor and a drive cable coupled to said rotor and configured to drive said rotor; and

wherein said pump assembly is dockable with said conduit assembly such that said rotor is receivable within said shroud and removable from said shroud by releasable docking thereof.

7. The system of claim 6, wherein said conduit assembly further comprising a guide mechanism extending proximally of said shroud.

8. The system of claim 7, wherein said guide mechanism comprises a guide catheter.

9. A method of installing a blood pump assembly within a location in a patient, said method comprising:

positioning a conduit assembly within the patient, such that a shroud connected to a cannula of said conduit assembly is positioned in a desired location and wherein a pump assembly is not connected to said conduit assembly during said positioning;

introducing a pump assembly into the patient and advancing the pump assembly to the position of the conduit assembly; and

docking the pump assembly with the conduit assembly such that a rotor of the pump assembly is received within the shroud.

10. The method of claim 9, wherein said conduit assembly is advanced intravascularly to perform said positioning.

11. The method of claim 9, wherein said conduit assembly includes a guide catheter extending proximally of said shroud, and said advancing the pump assembly comprises advancing at least a distal end portion of said pump assembly through said guide catheter.