| 摘要 |
A blood heating system for use in open heart surgery including an arterial/venous fluid circuit, a cardioplegia fluid circuit independent of the arterial/venous fluid circuit, a first heater in heat exchange relationship with the arterial/venous fluid circuit, a second heater in heat exchange relationship with the cardioplegia fluid circuit, a power supply connected to the first and second heaters so as to supply a desired electrical power, to the first and second heaters, and a controller electrically interconnected to the power supply and to the first and second heaters such that the first and second heaters cannot be activated simultaneously. A relay is electrically interconnected between the first and second heaters and the power supply so as to deactivate one of the heaters when the other of the heaters is activated. A timer is connected to the relay so as to alternately activate and deactivate the respective heaters after a desired period of time.
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