Fluid handling – Self-proportioning or correlating systems – Mixture condition maintaining or sensing
Patent
1992-10-27
1994-03-22
Nilson, Robert G.
Fluid handling
Self-proportioning or correlating systems
Mixture condition maintaining or sensing
21032171, A61M 114
Patent
active
052955052
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.
REFERENCES:
patent: 3352779 (1967-11-01), Austin
patent: 3847809 (1974-11-01), Kopf
patent: 4895657 (1990-01-01), Polaschegg
DE-Z Biomedizinische Technik, vol. 29, Issue 6 (1984) p. 166.
DE-Z: Medizintechnik, 105, Jahrgang Nr. 4 (1985), pp. 113-118.
Polaschegg Hans-Dietrich
Walter Claus
Fresenius AG
Nilson Robert G.
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