Method for detecting a liquid level in a container in a circuit and a dialysis machine for actuating the method
First Claim
1. A method for determining a liquid level in a container of known volume occupied in part by a liquid and in part by a gas, the method comprising the steps of:
- taking the liquid to the container;
evacuating the liquid from the container;
creating a liquid level in the container while the liquid is taken to and evacuated from the container;
varying at least one of a mass of the gas and a mass of the liquid in the container;
detecting pressure values in the container before and after said variation of at least one of a mass of the gas and a mass of the liquid in the container; and
determining the liquid level in the container from said detected pressure values.
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Accused Products
Abstract
A container of a dialysis machine has a determined shape and a known volume occupied in part by a volume of a mass of blood; a remaining part is occupied by a volume of a mass of gas. A disturbance is induced in a combined mass of the liquid and the gas in the container and an entity of the disturbance is measured. Measurements of pressure in the container before and after the disturbance are taken, the volume of gas is calculated using a function correlated to a gas law, and the volume and level of the liquid in the container are derived after the volume occupied by the gas is calculated.
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Citations
12 Claims
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1. A method for determining a liquid level in a container of known volume occupied in part by a liquid and in part by a gas, the method comprising the steps of:
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taking the liquid to the container;
evacuating the liquid from the container;
creating a liquid level in the container while the liquid is taken to and evacuated from the container;
varying at least one of a mass of the gas and a mass of the liquid in the container;
detecting pressure values in the container before and after said variation of at least one of a mass of the gas and a mass of the liquid in the container; and
determining the liquid level in the container from said detected pressure values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification