Compositions, methods and devices for maintaining an organ
First Claim
1. A preservation system, comprisinga chamber assembly for containing a liver,a perfusion circuit including a first conduit for providing an oxygenated fluid to the liver, and a second conduit for carrying depleted fluid away from the liver,a cannula for allowing a flow of bile away from the liver,a reservoir disposed along the perfusion circuit for containing a portion of the fluid, the reservoir including an inlet for receiving the fluid from the perfusion circuit and outlet for supplying the fluid to the perfusion circuit,a pump for circulating the fluid through the perfusion circuit,an oxygenating device disposed along the perfusion circuit to maintain the fluid at physiologic levels of oxygenation, anda temperature control device that has a heater and a temperature control sufficient to maintain the fluid at a temperature of greater than 25°
- C. to approximately 37°
C.,wherein the pump, oxygenating device, and the temperature control device are adapted to operate with the perfusion circuit to maintain the liver in a functioning and viable state in an ex-vivo environment.
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Accused Products
Abstract
Compositions, methods, systems/devices and media are provided for maintaining a harvested organ in a functioning and viable state prior to implantation. The organ perfusion apparatus includes a preservation chamber for storing the organ during the preservation period. A perfusion circuit is provided having a first line for providing an oxygenated fluid to the organ, and a second line for carrying depleted fluid away from the organ. The perfusion apparatus also includes a device operably associated with the perfusion circuit for maintaining the organ at a substantially normothermic temperature.
231 Citations
27 Claims
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1. A preservation system, comprising
a chamber assembly for containing a liver, a perfusion circuit including a first conduit for providing an oxygenated fluid to the liver, and a second conduit for carrying depleted fluid away from the liver, a cannula for allowing a flow of bile away from the liver, a reservoir disposed along the perfusion circuit for containing a portion of the fluid, the reservoir including an inlet for receiving the fluid from the perfusion circuit and outlet for supplying the fluid to the perfusion circuit, a pump for circulating the fluid through the perfusion circuit, an oxygenating device disposed along the perfusion circuit to maintain the fluid at physiologic levels of oxygenation, and a temperature control device that has a heater and a temperature control sufficient to maintain the fluid at a temperature of greater than 25° - C. to approximately 37°
C.,wherein the pump, oxygenating device, and the temperature control device are adapted to operate with the perfusion circuit to maintain the liver in a functioning and viable state in an ex-vivo environment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
- C. to approximately 37°
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17. A portable preservation system for maintaining an ex vivo liver in a near physiologic state, the system comprising:
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a container configured to hold the liver; an oxygenator configured to oxygenate a perfusion fluid; a perfusion circuit in communication with the oxygenator, the perfusion circuit comprising; a first fluid line configured to deliver the perfusion fluid from the oxygenator to a portal vein of the liver; a second fluid line configured to deliver the perfusion fluid from the oxygenator to a hepatic artery of the liver; and an outlet fluid line configured to carry the perfusion fluid away from the container; a cannula configured to flow bile away from the liver; a heater coupled to the perfusion circuit and configured to heat the perfusion fluid to a temperature of greater than 25°
C. to about 37°
C.;a pump configured to circulate the perfusion fluid through the perfusion circuit and the liver; a fluid reservoir coupled to the perfusion circuit and configured to contain a portion of the perfusion fluid; a sensor configured to measure a parameter of the perfusion fluid in the perfusion circuit; a processor configured to receive the parameter, the processor being in communication with at least one of the oxygenator, the heater, the pump, and the sensor. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A method of maintaining an ex vivo liver in a near physiologic state, the method comprising:
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placing a liver in a container; oxygenating a perfusion fluid; cannulating the liver to allow a flow of bile away from the liver; pumping the perfusion fluid in a perfusion circuit coupled to the liver to provide the perfusion fluid to a portal vein of the liver and to a hepatic artery of the liver; heating the perfusion fluid to a temperature of greater than 25°
C. to about 37°
C.;receiving the perfusion fluid from the liver in a reservoir; containing the perfusion fluid in the reservoir; measuring a parameter of the perfusion fluid in the perfusion circuit; and controlling at least one of the pumping and the heating in response to the measured parameter.
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Specification