Intracardiac blood pump

• US 20030187322A1
• Filed: 02/18/2003
• Published: 10/02/2003
• Est. Priority Date: 08/18/2000
• Status: Active Grant

• Current Assignee: Impella Cardiosystems Gmbh (Johnson & Johnson)
• Original Assignee: ABIOMED Europe GmbH (Johnson & Johnson)
• Inventors: Siess, Thorsten
• Granted Patent: US 7,070,555 B2
• Time in Patent Office: Days
• US Class Current: 600/16
• CPC Class Codes: A61M 2230/005 Parameter used as control input for the apparatus
• CPC Class Codes: A61M 2230/06 Heartbeat rate only
• CPC Class Codes: A61M 2230/30 Blood pressure A61M2230/04 takes precedence
• 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 60/178 drawing blood from a ventricle and returning the blood to the arterial system via a cannula external to the ventricle, e.g. left or right ventricular assist devices
• CPC Class Codes: A61M 60/216 including a rotating member acting on the blood, e.g. impeller
• CPC Class Codes: A61M 60/416 transmitted directly by the motor rotor drive shaft
• CPC Class Codes: A61M 60/419 the force acting on the blood contacting member being permanent magnetic, e.g. from a rotating magnetic coupling between driving and driven magnets
• CPC Class Codes: A61M 60/554 of blood pressure
• CPC Class Codes: A61M 60/81 Pump housings
• CPC Class Codes: A61M 60/816 Sensors arranged on or in the housing, e.g. ultrasound flow sensors

Abstract

The blood pump (10) comprises an elongate drive portion (11) and a pump portion (12) lengthening the latter. Between the two portions, flow openings (17) are positioned. According to the invention, the flow openings (17) are covered by a screen (24) preventing the blood pump from sucking fast on tissue parts or cardiac valves or from sucking in endogenous tissue and being blocked thereby.

Claims

1. Intracardiac blood pump comprising a drive portion (11) including a motor (19), a pump portion (12) including a pump wheel (22) driven by the motor (19), the blood stream flowing along the outside of the drive portion and at least one lateral flow opening (17) being provided between the drive portion (11) and the pump portion (12),

characterized in

that the flow opening (17) is covered by a screen (24,24a) extending over the entire length of the flow opening and diverting the blood stream passing the flow opening.

2. Blood pump according to claim 1, characterized in that the pump wheel (22) delivers from the flow opening (17) to an end opening (31) of the pump portion (11) and the screen (24) comprises at least one inlet opening (26,27) at its circumference.

3. Blood pump according to claim 2, characterized in that the screen (24) comprises at least one inlet opening (26) above the pump portion (12).

4. Blood pump according to claim 2 or 3, characterized in that the screen (24) comprises at least one inlet opening (27) above the drive portion (11).