摘要:
The present invention generally relates to heart treatment systems. In some aspects, methods and systems are provided for facilitating communication between implanted devices. For example, an implantable cardiac rhythm management device may be configured to communicate with an implantable blood pump. The implantable cardiac rhythm management device may deliver heart stimulation rate information in addition to information associated with any detected abnormalities in heart function. In response, the pump may be configured to adjust pumping by the pump to better accommodate a patient's particular needs.
摘要:
A method of controlling an implantable blood pump of a living patient. The method includes receiving one or more pump signals indicating at least one from the group consisting of a motor speed of the blood pump, power supplied to the blood pump, and differential pressure exerted by the blood pump. One or more medication signals is received indicating whether the patient has taken a medication. The flow rate of blood based on a combination of the one or more pump signals and the medication signals is determined. At least one from the group consisting of increasing and decreasing power is supplied to the pump in response to the determined flow rate.
摘要:
A catheter pump system is disclosed. The catheter pump system can include a shaft assembly and an impeller coupled with a distal portion of the shaft assembly. The catheter pump system can include a motor assembly, the motor assembly comprising a chamber and a shaft-driving portion disposed in the chamber. The shaft-driving portion can be configured to impart rotation to the impeller through the shaft assembly. The chamber can be filled with a gas that at least partially surrounds the shaft-driving portion. A fluid pathway can convey fluid proximally during operation of the catheter pump system. A bypass pathway can be in fluid communication with the fluid pathway, the bypass pathway configured to direct at least a portion of the fluid to bypass the chamber.
摘要:
Die Erfindung bezieht sich auf eine Blutpumpe zur Herzunterstützung mit einem Rotor (4), der innerhalb eines Rotorraumes (6a) rotiert und der Förderelemente (10) aufweist, die das Blut in Umfangsrichtung und/oder in Radialrichtung fördern, wobei anschließend an den Rotorraum ein Auslassgehäuse vorgesehen ist. Die Neuerung sieht eine im Auslassgehäuse angeordnete Strömungsleitvorrichtung in Form wenigstens einer oder mehrerer Schaufeln (20, 21, 22, 31, 36, 40) vor, deren Längserstreckung entlang einer Begrenzungswand des Auslassgehäuses verläuft. Mittels der Schaufeln kann die Blutströmung in Bezug auf die Effizienz, Effektivität der Pumpe und die Blutschädigung optimiert werden.
摘要:
A heart pump including a housing defining a cavity including at least one inlet and at least one outlet, an impeller provided within the cavity, the impeller including vanes for urging fluid from the inlet to the outlet upon rotation of the impeller, a drive that rotates the impeller within the cavity, a magnetic bearing including at least one bearing coil that controls an axial position of the impeller within the cavity, a sensor that senses an axial position of the impeller within the cavity and a controller. The controller includes an electronic processing device that, in response to a change in axial hydraulic forces on the impeller determines an axial position of the impeller within the cavity, determines a reference power in accordance with the determined axial position and controls the magnetic bearing to cause the impeller to move until a bearing power indicator indicative of the power used by the magnetic bearing reaches the reference power.
摘要:
Blood pump devices having improved rotor design are provided herein. Such blood pump devices include rotors having cantilevered support through a sealed mechanical bearing disposed outside a blood flow path of the device so as to avoid thrombus formation caused by blood contact with the bearing. The bearing means can be rotatably coupled with a proximal portion of the rotor shaft extending outside the fluid path, while a stator drives rotation of the rotor shaft so that one or more rotor blades on a distal portion of the rotor force blood flow through the device. The bearing means may include one or more radial bearings on a proximal portion of the rotor shaft that are isolated from the blood flow path by one or more rotary seals.
摘要:
Blood pumps for ventricular assist devices employ a hollow rotor to impel blood through the blood pump. A blood pump includes a housing having a housing inlet, a housing outlet, and a housing blood flow channel through which the housing inlet and the housing outlet are in fluid communication. A motor stator is disposed around the housing blood flow channel and operable to generate a rotating magnetic field. A hollow rotor is disposed within the housing blood flow channel and rotated via the rotating magnetic field. The hollow rotor has a rotor circumferential wall enclosing a rotor blood flow channel. The hollow rotor has at least one rotor blade extending inwardly from the rotor circumferential wall. The at least one rotor blade is configured to impel blood through the rotor blood flow channel when the hollow rotor is rotated via the rotating magnetic field.
摘要:
Die Erfindung betrifft eine Rotorwelle (102) für ein Herzunterstützungssystem. Die Rotorwelle (102) umfasst zumindest einen Lagerabschnitt (600, 602) zum Lagern der Rotorwelle (102) in einem Rotorwellenträger sowie zumindest ein in dem Lagerabschnitt (600, 602) angeordnetes Strukturelement (608) zum Erzeugen eines Fluidfilms in einem Schmierspalt zwischen dem Lagerabschnitt (600, 602) und dem Rotorwellenträger beim Drehen der Rotorwelle (102) in einem Fluid.
摘要:
The invention generally relates to improved medical blood pump devices, systems, and methods. For example, blood pumps may be provided that include a housing defining a blood flow path between an inlet and an outlet. A rotor may be positioned in the blood flow path. A motor stator may be driven to rotate the rotor to provide the blood flow through the pump. Axial and/or tilt stabilization components may be provided to increase an axial and/or tilt stabilization of the rotor within the blood flow path. In some embodiments, biasing forces are provided that urge the rotor toward a bearing component. The biasing force may be provided by adjusting drive signals of the motor stator. Additionally, or alternatively, one or more magnets (e.g., permanent/stator magnets) may be provided to bias the rotor in the upstream and/or downstream direction (e.g., toward a bearing (chamfer, step, conical), or the like).
摘要:
Die Erfindung betrifft ein Verfahren zum Fördern von Blut oder Primingflüssigkeit als Medium mit einer Blutpumpe, bei dem in einer Zuleitung zur Pumpe, in oder an der Pumpe im Medium Gas gemessen wird und die Pumpenleistung abhängig vom gemessenen Gas nur kurzzeitig erhöht wird und eine Blutpumpe, insbesondere Zentrifugalpumpe oder Diagonalpumpe, mit einem Rotor, einem Gehäuse und einem Antrieb, die einen Gasdetektor aufweist, der bei Detektion von Gas auf den Antrieb wirkt.