Method for the hypothermic perfusion of a cardiac organ, and device for the implementation thereof
A device for hypothermic perfusion of a cardiac organ comprising a first sealed tank able to contain a physiological liquid, a second sealed tank communicating, in a sealed manner, with an internal volume of the first tank via a nozzle, a device for refrigerating the first tank and keeping the first tank at a substantially constant temperature and a device for intermittently pressurizing the internal volume of the first tank. The first tank communicates with the pressurizing device by way of a conduit connecting an interior of the first tank to the pressurizing device to permit pressurization of the internal volume of the first tank, and of the physiological liquid inside the first tank, in order to perform perfusion of the organ. The second tank comprises a safety element formed by an overflow outlet duct which communicates with the first tank and includes a non-return valve.
1. A device ( 1 ) for hypothermic perfusion of a cardiac organ comprising:
a. a first sealed tank ( 2 ) able to contain a physiological liquid (LP);
b. a second sealed tank ( 3 ) communicating, in a sealed manner, with an internal volume of the first tank via a nozzle ( 6 ), an end of the nozzle adapted to connect to the cardiac organ;
c. a device for refrigerating the first tank ( 2 ) and keeping the first tank ( 2 ) at a substantially constant temperature;
d. a device ( 4 ) for intermittently pressurizing the internal volume of the first tank;
wherein the first tank ( 2 ) communicates with the pressurizing device ( 4 ) by way of a conduit ( 5 ) connecting an interior of the first tank ( 2 ) to the pressurizing device, so as to permit pressurization of the internal volume of the first tank ( 2 ) and of the physiological liquid inside the first tank ( 2 ), in order to perform perfusion of the organ (O); and
wherein the second tank ( 3 ) constitutes a U-type perfusion system which, in a bottom wall thereof common with an upper wall of the first tank ( 2 ), comprises a safety element ( 7 ) formed by an overflow outlet duct which communicates with the first tank ( 2 ) and includes a non-return valve ( 10 ).
2. The device as claimed in claim 1 , comprising where the second tank ( 3 ) has an outlet ( 8 ) for an internal overpressure, which outlet ( 8 ) is provided with a filter and with a non-return valve ( 9 ).
3. The device as claimed in claim 1 , comprising where the pressurizing means ( 4 ) have an air compressor assembly connected in a sealed manner to the internal volume of the first tank ( 2 ) via a suitable channel ( 5 ).
4. The device as claimed in claim 3 , comprising where the air compressor assembly has a compressed-air generator, which delivers a substantially constant air flow and which is connected to a solenoid valve controlled by a pressure regulator in order to feed the first tank discontinuously via said channel and perform intermittent pressurization of said tank.
5. The device as claimed in claim 4 , comprising where the solenoid valve and the pressure regulator are powered by a battery or by mains.
6. The device as claimed in claim 1 , comprising where the second tank ( 3 ) has sensors for measuring the coronary flow rate and the coronary resistance of a cardiac organ (O).