Implantable pump system having a coaxial ventricular cannula
First Claim
1. An implantable cardiovascular pump system comprising,a housing configured to be implanted in or coupled to a patient'"'"'s heart;
- a pump assembly disposed within the housing, the pump assembly comprising an actuator assembly coupled to a circumference of a vibrating membrane, the vibrating membrane unsupported other than at the circumference;
an outflow cannula in fluid communication with the pump assembly, the outflow cannula having an inlet and an outlet; and
an inflow cannula in fluid communication with the pump assembly, the inflow cannula having an inlet and an outlet disposed within the patient'"'"'s heart,wherein the actuator assembly is configured to cause the vibrating membrane to vibrate to transfer blood from the inlet of the inflow cannula through the housing around the actuator assembly and out the outlet of the outflow cannula, and wherein the outflow cannula is disposed coaxially within the outlet of the inflow cannula.
1 Assignment
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Accused Products
Abstract
An implantable cardiovascular blood pump system is provided, suitable for use as a left ventricular assist device (LVAD) system, having an implantable cardiovascular pump, an extracorporeal battery and a controller coupled to the implantable pump, and a programmer selectively periodically coupled to the controller to configure and adjust operating parameters of the implantable cardiovascular pump. The implantable cardiovascular blood pump includes a coaxial inflow cannula and outflow cannula in fluid communication with one another and with a pumping mechanism. The pumping mechanism may be a vibrating membrane pump which may include a flexible membrane coupled to an electromagnetic actuator assembly that causes wavelike undulations to propagate along the flexible membrane to propel blood through the implantable cardiovascular pump. The implantable cardiovascular pump may be programmed to operate at frequencies and duty cycles that mimic physiologic flow rates and pulsatility while avoiding thrombus formation, hemolysis and/or platelet activation.
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Citations
20 Claims
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1. An implantable cardiovascular pump system comprising,
a housing configured to be implanted in or coupled to a patient'"'"'s heart; -
a pump assembly disposed within the housing, the pump assembly comprising an actuator assembly coupled to a circumference of a vibrating membrane, the vibrating membrane unsupported other than at the circumference; an outflow cannula in fluid communication with the pump assembly, the outflow cannula having an inlet and an outlet; and an inflow cannula in fluid communication with the pump assembly, the inflow cannula having an inlet and an outlet disposed within the patient'"'"'s heart, wherein the actuator assembly is configured to cause the vibrating membrane to vibrate to transfer blood from the inlet of the inflow cannula through the housing around the actuator assembly and out the outlet of the outflow cannula, and wherein the outflow cannula is disposed coaxially within the outlet of the inflow cannula. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification