Apparatus for preparation of a medicinal solution
First Claim
1. Apparatus for preparing a medicinal solution, in particular dialysis solution, from a pulverulent concentrate and water, comprising a water source, a first conduit from the water source to a container containing the pulverulent concentrate, a second conduit extending from the container to a mixing point which is located in a third conduit originating from the water source, a means for controlling the flow of the concentrate solution connected into the second conduit, a solution conveying means in the third conduit downstream of the mixing point, a first measuring cell in the conduit system, a control unit controlling the means for controlling the flow of the concentrate solution in predetermined manner in response to the signal of the first measuring cell such that the dialysis solution generated at the mixing point corresponds to a predetermined composition, and a protective system which comprises a second measuring cell and which is arranged downstream of the mixing point and switches off the apparatus in the event of an incorrect composition of the dialysis solution, characterized in that the first measuring cell (22) is connected into the second conduit (20).
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Accused Products
Abstract
An apparatus for preparing a medicinal solution, in particular dialysis solution, from pulverulent concentrate and water comprises a water source (12) from which a first conduit (14) is led to a container which contains the powder and from which a second conduit (20) into which a first measuring cell (22) and a concentrate pump (24) are connected leads to a mixing point (28). Said mixing point (28) is located in a third conduit (26) which leads from the water source to a consumer; downstream of the mixing point (28) a second measuring cell (30) is provided for monitoring the composition of the finished dialysis solution. Since the two measuring cells (22) and (30) lie in different conduits in which solutions of different composition are conveyed, there is no possibility whatever of confusions between concentrates of the same initial conductivity but different final conductivity after dilution with water.
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Citations
8 Claims
- 1. Apparatus for preparing a medicinal solution, in particular dialysis solution, from a pulverulent concentrate and water, comprising a water source, a first conduit from the water source to a container containing the pulverulent concentrate, a second conduit extending from the container to a mixing point which is located in a third conduit originating from the water source, a means for controlling the flow of the concentrate solution connected into the second conduit, a solution conveying means in the third conduit downstream of the mixing point, a first measuring cell in the conduit system, a control unit controlling the means for controlling the flow of the concentrate solution in predetermined manner in response to the signal of the first measuring cell such that the dialysis solution generated at the mixing point corresponds to a predetermined composition, and a protective system which comprises a second measuring cell and which is arranged downstream of the mixing point and switches off the apparatus in the event of an incorrect composition of the dialysis solution, characterized in that the first measuring cell (22) is connected into the second conduit (20).
Specification