Abstract: The invention relates to an access system 1 for a medical device, which system has a housing body 21 in which an inner pipe portion 22 for transporting a medical fluid is formed, which portion is enclosed by an outer pipe portion 24 so as to form an empty space 23 for receiving a disinfectant fluid, the housing body 21 having an opening 25 that can be closed by a closure element. The access system 1 according to the invention is characterised in that a measuring electrode 30 and at least one counter electrode 31, 32 are arranged in the housing body 21 such that the measuring electrode 30 interacts with the counter electrode via the empty space 23. The measuring electrode 30 allows an electrical signal to be input such that a current flowing between the measuring electrode and the counter electrode or a voltage applied between the measuring electrode and the counter electrode can be evaluated.

Abstract: The invention relates to an apparatus (100) for transmitting operating and machine data of a medical device (500), preferably a dialysis device, to an evaluation device (60), wherein the apparatus (100) comprises a data input (12) for receiving operating and machine data of the medical device (500), a programmable storage unit (20) which is configured to store at least a portion of the operating and machine data that is received, a voltage input (11) which is configured to supply the apparatus (100) with an operating voltage provided by the medical device (500), and a transmission unit (30) which is configured to transmit the stored operating and machine data to the evaluation device (60).

Abstract: The invention relates to an apparatus (100) for transmitting operating and machine data of a medical device (500), preferably a dialysis device, to an evaluation device (60), wherein the apparatus (100) comprises a data input (12) for receiving operating and machine data of the medical device (500), a programmable storage unit (20) which is configured to store at least a portion of the operating and machine data that is received, a voltage input (11) which is configured to supply the apparatus (100) with an operating voltage provided by the medical device (500), and a transmission unit (30) which is configured to transmit the stored operating and machine data to the evaluation device (60).

Abstract: A method of providing a concentrate of a dissolved substance for producing a dialysis solution includes providing a container containing a solid to be dissolved, supplying water into the container for dissolving the solid, draining the concentrate of the dissolved substance from the container and topping up with water, measuring the concentration of the dissolved substance or of a parameter correlated with the concentration, and temporary or permanent suppression of the topping up of water into the container. The suppression is effected when the measured concentration value of the dissolved substance falls below a first limit value or the value of the parameter falls below or exceeds a first limit value or when the change in the concentration value of the dissolved substance or of the value of the parameter exceeds a first limit value.

Abstract: The present invention relates to a method of providing at least one concentrate of at least one dissolved substance for producing at least one dialysis solution, with the method comprising the following steps: providing at least one container containing at least one solid to be dissolved; supplying water into the container for dissolving the solid; draining the concentrate of the dissolved substance from the container and topping up with water; measuring the concentration of the dissolved substance or of a parameter correlated with the concentration; and temporary or permanent suppression of the topping up of water into the container when the measured concentration value of the dissolved substance falls below a first limit value or the value of the parameter falls below or exceeds a first limit value or when the change in the concentration value of the dissolved substance or of the value of the parameter exceeds a first limit value.