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US 12,514,965 B2Granted
Method for checking the functionality of conveying devices of a medical treatment apparatus, and apparatuses
AssigneeFresenius Medical Care Deutschland GmbH
InventorsDieter Stoehlein, Juergen Schueller, Walter Ehrenberger
Life of this patent
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Abstract
The present disclosure relates to a method for checking the functionality of conveying devices of a medical treatment apparatus. It further relates to a control device and/or closed-loop control device and to a medical treatment apparatus through which the method according to the present disclosure is effected, to a digital storage medium, a computer program product and to a computer program.
Claims23
A method for checking a functionality of a conveying device of a medical treatment apparatus for an extracorporeal blood treatment, the method comprising:
- providing a container filled with liquid, wherein the container is in fluid communication or conveying communication with the conveying device;
- setting a predetermined initial pressure (P_0) inside the container;
- controlling the conveying device to perform a predetermined number of conveying movements;
- after completion of the predetermined number of conveying movements of the conveying device, measuring a pressure prevailing in the container using a pressure measuring device and defining the measured pressure as a final pressure (P_1), wherein the initial pressure (P_0) is set and the final pressure (P_1) is measured when an internal temperature of the container is set to a predetermined temperature value at which a reference value (P_R) has been measured;
- receiving, from a first storage device, the stored reference value (P_R) comprising a reference pressure or a reference pressure difference;
- determining a pressure difference (ΔP), wherein the pressure difference (ΔP) equals either:
- a difference between the final pressure (P_1) and the stored reference value (P_R), or
- a difference between:
- (i) a difference between the initial pressure (P_0) and the final pressure (P_1) and (ii) a difference between the initial pressure (P_0) and the stored reference value (P_R);
- and
- evaluating the determined pressure difference (ΔP).
8 more elements
A control device or a closed-loop control device configured to initiate or carry out, in interaction with a medical treatment apparatus, a method comprising:
- setting a predetermined initial pressure (P_0) inside a container filled with liquid, wherein the container is in fluid communication or conveying communication with a conveying device;
- controlling the conveying device to perform a predetermined number of conveying movements;
- after completion of the predetermined number of conveying movements of the conveying device, measuring a pressure prevailing in the container using a pressure measuring device and defining the measured pressure as a final pressure (P_1), wherein the initial pressure (P_0) is set and the final pressure (P_1) is measured when an internal temperature of the container is set to a predetermined temperature value at which a reference value (P_R) has been measured;
- receiving, from a first storage device, the stored reference value (P_R) comprising a reference pressure or a reference pressure difference;
- determining a pressure difference (ΔP), wherein the pressure difference (ΔP) equals either:
- a difference between the final pressure (P_1) and the stored reference value (P_R), or
- a difference between:
- (i) a difference between the initial pressure (P_0) and the final pressure (P_1) and (ii) a difference between the initial pressure (P_0) and the stored reference value (P_R);
- and
- evaluating the determined pressure difference (ΔP).
7 more elements
A medical treatment apparatus comprising or connected to:
- a liquid system comprises a container for liquid;
- a pressure measuring device for measuring a pressure prevailing in the container, the measured pressure being defined as a final pressure (P_1);
- a first storage device storing a reference value (P_R), wherein the reference value (P_R) comprises a reference pressure or a reference pressure difference;
- a read-out device configured to read out the reference value (P_R) stored on the first storage device;
- an evaluation device configured to evaluate a determined pressure difference (ΔP);
- at least one conveying device in fluid communication or conveying communication with the container);
- and
- a control device or closed-loop control device configured to initiate execution of a method comprising:
- setting a predetermined initial pressure (P_0) inside the container;
- controlling the at least one conveying device to perform a predetermined number of conveying movements;
- after completion of the predetermined number of conveying movements of the conveying device, measuring a pressure prevailing in the container using the pressure measuring device and defining the measured pressure as a final pressure (P_1), wherein the initial pressure (P_0) is set and the final pressure (P_1) is measured when an internal temperature of the container is set to a predetermined temperature value at which the reference value (P_R) has been measured;
- receiving, from the first storage device, the stored reference value (P_R);
- determining the pressure difference (ΔP), wherein the pressure difference (ΔP) equals either:
- a difference between the final pressure (P_1) and the reference value (P_R), or
- a difference between:
- (i) a difference between the initial pressure (P_0) and the final pressure (P_1) and (ii) a difference between the initial pressure (P_0) and the reference value (P_R);
- and
- evaluating the determined pressure difference (ΔP).
15 more elements
Dependencies are inferred from the claim text.