Medical treatment apparatus and apparatus for providing medical treatment liquids and device for filling a device for delivering medical fluids

The invention relates to a medical treatment device 2, in particular extracorporeal blood treatment apparatus, with a female unit B for connection of a plug-unit A of a device 1 for providing a medical fluid for medical treatment device and an apparatus 3 for filling a device 1 for providing a medical liquid having a jack assembly B 'for connection to a connector unit a of the device 1 for providing a medical fluid. Moreover, the invention relates to a device 1 for providing a medical fluid. The connector unit A of the device 1 for providing a medical liquid comprises means 86 for signaling two operating states, whereas the jack assembly B of the treatment device 2 has means 88 for destroying the means 86 for signaling of two operating states. When connecting the connector unit A to the unit B, the female agents are destroyed for the signaling of two operating states, to preclude reuse of the device 1 for providing a medical fluid. The reuse of the device is precluded by the fact that the device can not be refilled with liquid