Method and device for preparing a medical fluid

Details Method and device for preparing a medical fluid Method and device for preparing a medical fluid

A - Human Necessities

61

M

A61M 1/16 (2006.01)

Patent

CA 2356774

The invention concerns a method for preparing a medical fluid from a liquid such as water and two concentrated solutions comprising the following steps: causing the liquid to circulate in a piping system (15) at a flow rate Q0; injecting into the piping system (15), at a flow rate Q1, a first concentrated solution containing a first ionic substance A and a second ionic substance B, the ionic substances A and B having respectively, in the first concentrated solution, a concentration [Asol] and a first concentration [B1sol]; injecting into the piping system (15), at a flow rate Q2, a second concentrated solution containing the first ionic substance A and the second ionic substance B; the first ionic substance A having, in the second concentrated solution, the same concentration [Asol] as in the first concentrated solution, and the second ionic substance B having, in the second concentrated solution, a second concentration [B2sol] different from the first concentration [B1sol] in the first concentrated solution; adjusting the flow rate of injection Q1 and the flow rate of injection Q2 of the first and second concentrated solutions such that, at any time, the diluted solution resulting from the liquid mixture and the concentrated solutions has a desired concentration [Ades] of the first substance A and a desired concentration [Bdes] of the second substance B.

Un procédé de préparation d'un liquide médical à partir d'un liquide, tel que de l'eau, et de deux solutions concentrées comprend les étapes de: mettre le liquide en circulation dans une canalisation (15), à un débit Q0; injecter dans la canalisation (15), à un débit Q1, une première solution concentrée contenant une première substance ionique A et une deuxième substance ionique B, les substances ioniques. A et B ayant respectivement, dans la première solution concentrée, une concentration [Asol] et une première concentration [B1sol]; injecter dans la canalisation (15), à un débit Q2, une deuxième solution concentrée contenant la première substance ionique A et la deuxième substance ionique B, la première substance ionique A ayant, dans la deuxième solution concentrée, la même concentration [Asol] que dans la première solution concentrée, et la deuxième substance ionique B ayant, dans la deuxième solution concentrée, une deuxième concentration [B2sol] différente de la première concentration [B1sol] dans la première solution concentrée; régler le débit d'injection Q1 et le débit d'injection Q2 de la première et de la deuxième solutions concentrées de façon que, à tout moment, la solution diluée résultant du mélange du liquide et des solutions concentrées ait une concentration souhaitée [Ades] en la première substance A et une concentration souhaitée [Bdes] en la deuxième substance B.

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