EP3914314A1 - Verfahren zum überprüfen der fördergenauigkeit von fördermitteln einer medizinischen behandlungsvorrichtung, und vorrichtungen - Google Patents
Verfahren zum überprüfen der fördergenauigkeit von fördermitteln einer medizinischen behandlungsvorrichtung, und vorrichtungenInfo
- Publication number
- EP3914314A1 EP3914314A1 EP20702250.0A EP20702250A EP3914314A1 EP 3914314 A1 EP3914314 A1 EP 3914314A1 EP 20702250 A EP20702250 A EP 20702250A EP 3914314 A1 EP3914314 A1 EP 3914314A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- funding
- pressure
- container
- compliance
- activity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
- A61M1/16—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis with membranes
- A61M1/1601—Control or regulation
- A61M1/1603—Regulation parameters
- A61M1/1605—Physical characteristics of the dialysate fluid
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
- A61M1/16—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis with membranes
- A61M1/1654—Dialysates therefor
- A61M1/1656—Apparatus for preparing dialysates
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/34—Filtering material out of the blood by passing it through a membrane, i.e. hemofiltration or diafiltration
- A61M1/3403—Regulation parameters
- A61M1/341—Regulation parameters by measuring the filtrate rate or volume
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
- A61M1/3621—Extra-corporeal blood circuits
- A61M1/367—Circuit parts not covered by the preceding subgroups of group A61M1/3621
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3331—Pressure; Flow
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/70—General characteristics of the apparatus with testing or calibration facilities
- A61M2205/702—General characteristics of the apparatus with testing or calibration facilities automatically during use
Definitions
- the present invention relates to a method according to the preamble of claim 1, a control device according to the preamble of claim 13 and one
- Claim 14 Furthermore, the present invention relates to a digital storage medium according to Claim 26
- Known blood treatment devices include, for example, devices for hemodialysis,
- Extracorporeal blood treatment flows the blood through an extracorporeal blood circuit
- the blood treatment unit is a dialyzer or filter, which, to put it simply, is separated into a blood chamber and a dialysis fluid chamber by a semipermeable membrane.
- the blood flows through the blood chamber, while a dialysis fluid flows through it
- Dialysis fluid chambers flow.
- the dialysis fluid can be prepared by volumetric mixing.
- Volumetric mixing is understood to mean that at least one liquid is metered by volume. For example, pure water and at least one
- Liquid concentrate is metered volumetrically and mixed into fresh dialysis liquid according to a specified recipe.
- the funding accuracy of a funding can change over time. This can be caused by, for example
- Pressure maintenance test which can be reliably identified in a simple manner, other causes which can lead to a greater or a smaller delivery rate are not automatically recognizable.
- the delivery rate can be determined by gauging. Such work is done by a qualified
- Control device which can optionally also regulate
- a blood treatment device in particular a blood treatment device can be specified.
- the invention thus provides a method for quantitative or qualitative checking of the funding accuracy of funding from a group of funding
- the group consists of a first
- the method comprises providing a container which is preferably completely filled with liquid. Air or another gas is preferably not provided in the container.
- the container is in fluid communication with each of the group's funding. Each of these grants is included
- the method optionally includes completely filling the container with liquid.
- a predetermined initial pressure (or: outlet pressure) is optionally set in the container.
- the setting can, purely by way of example, be carried out by means of filling pumps and / or valves in lines which fluidly connect the container to an exterior of the container.
- the filling pump can be used to provide a predetermined liquid pressure inside the container.
- a defined filling ie that after filling prevailing pressure is known and / or predetermined. It is preferably above atmospheric pressure.
- the method optionally includes measuring the closed, liquid-filled container
- Filling the container with sufficient accuracy can be assumed that the level of the pressure in the container after filling is already known, for example due to the filling process as such.
- the pressure prevailing after filling can be assumed to be known even without a first pressure measurement in all of the statements made here.
- the method comprises driving a first one
- the first grant is initiated, one for the same grant
- This funding activity can consist of a number of strokes
- the z. B. is required in the light of the type of funding to provide the required funding activity and is referred to herein as the target funding activity
- the target promotional activity can be the one called or requested by the user or by the control system
- Describe funding activity which in turn can correspond to a specific funding volume.
- the promotional activity actually or effectively provided as a result, e.g. B. that volume actually funded, of which each
- the activation can thus be understood, for example, as calling up or requesting the predetermined promotional activity, with the aim of having a target volume or a predetermined target or desired volume conveyed out of the container.
- the method further comprises measuring the pressure prevailing in the container by means of a second pressure measurement after the conveying activity of the conveying means under consideration has ended, for example when the desired conveying activity has been reached.
- the pressure measured is defined or referred to as the final pressure. If there was a first pressure measurement, see above, this measurement of the final pressure would be the second pressure measurement.
- the final pressure achieved after being conveyed out by means of the first conveying means being the first
- a first pressure difference becomes the difference between the initial pressure and the first final pressure and / or further optionally a first
- a second final pressure and optionally further a second pressure difference are used as the difference between the initial pressure and the second final pressure and / or further for the conveying out by means of the second conveying means
- a second compliance is determined.
- a third final pressure and optionally further a third pressure difference are determined as the difference between the initial pressure and the third final pressure and / or optionally a third compliance for the conveying out by means of the third conveying means.
- a pressure difference between the result determined by means of the first pressure measurement and the result determined by means of the second pressure measurement is also calculated.
- a compliance of the container can be calculated based on these pressure measurements.
- liquid is conveyed out by means of the first conveying means, liquid is also conveyed out of the container by means of the second and subsequently by means of the third conveying means. Between the conveying out by means of the first and the second conveying means and between the conveying out by means of the second and the third
- the method optionally includes evaluating at least the first final pressure, second final pressure and third final pressure, preferably with one another, with “with one another” herein
- the method comprises evaluating at least the first pressure difference, the second
- At least the first compliance, second compliance or third compliance also preferably with one another.
- the result or goal of the evaluation can be a
- Control device also referred to herein briefly as a control device, is proposed. It is configured to im
- a blood treatment device (in short: treatment device) is proposed according to the invention.
- Treatment device has
- a pressure measuring device (preferably an absolute pressure measuring device) for measuring a pressure prevailing in the container and an evaluation unit, which for evaluating final pressures, pressure differences and / or Compliances is configured, especially as described herein.
- the treatment device has a group of conveying means, which consists of a first
- Funding means a second funding means and a third funding means, each of the first to third funding means being in fluid communication with the container.
- Treatment device comprises a control or regulating device, which is configured to cause, in particular automatically, the method according to the invention by interacting with further devices or devices of the treatment device, in particular as disclosed herein.
- the control device can include the evaluation unit.
- Interaction can be or include control, regulation or control. Interaction can be one
- the blood treatment device can have an appropriately suitable and / or configured device, such as, for each of the steps mentioned herein.
- a filling device for filling the container z. B. a pump, a valve or the like
- a filling device for filling the container z. B. a pump, a valve or the like
- An inventive, in particular digital, in particular non-volatile, storage medium (here also as a carrier referred to), in particular in the form of floppy disk, RAM, ROM, CD, hard disk, DVD, USB stick, flash card, SD card or EPROM, in particular with electronically or optically readable
- Control signals can be configured to a
- Control device to a control device
- the inventive method can be effected.
- a computer program product has a volatile, volatile or program code stored on a machine-readable medium, through which one
- Control device is configured such that the inventive method described herein can be effected.
- machine-readable carrier as used herein
- the carrier denotes a carrier which contains data or information which can be interpreted by software and / or hardware.
- the carrier can be a data carrier, such as a floppy disk, a CD, DVD, a USB stick, a flash card, an SD card, an EPROM and the like.
- a computer program according to the invention has one
- the inventive method can be effected. All, some or some of the machines can do this
- a computer program product can be, for example, one stored on a carrier
- Computer program an embedded system as a comprehensive system with a computer program (e.g. an electronic device with a computer program), a network of
- Client / server system, cloud computing system, etc. or a computer on which a computer program is loaded, running, stored, executed or developed is understood.
- a physical, marketable software product can be understood that has a program.
- the term includes
- Funding activity is a funding performance, e.g. B. a
- Delivery volume per stroke or revolution or the like a delivery behavior, in particular when trying to deliver an instructed volume, delivery work, a delivery volume, or delivery of a nominal delivery volume.
- the evaluation takes place in each case by a measure for the deviation of an actual one Funding activity of the first, second and / or third
- the measure can be a percentage number, which indicates which part constitutes the actual funding activity of the first, second and / or third funding means from the targeted target funding activity.
- the measure can indicate the percentage by which the actual funding activity of one of the funds differs from the actual funding activity of another of the funding.
- the evaluation includes that
- Pressure difference selected from the first, second or third pressure difference, with at least one or one of the other two final pressures or pressure differences, or the evaluation consists of this.
- the evaluation includes that
- the evaluation comprises determining whether the first final pressure, the second final pressure and / or the third final pressure lie within predetermined limits, exceed or fall below a limit value, exceed a minimum value or do not exceed a maximum value, or the evaluation consists of this. In some embodiments, the evaluation includes that
- Pressure difference and / or the third pressure difference lie within predetermined limits, exceed or fall below a limit value, exceed a minimum value or do not exceed a maximum value, or the evaluation consists of this.
- the evaluation includes that
- Limits lie, exceed or fall below a limit value, exceed a minimum value or do not exceed a maximum value, or the evaluation consists of this.
- the evaluation includes that
- control of at least one funding means of the group takes place at a first operating point in relation to this funding means, and the control of at least one other funding means from the group takes place at a second operating point based on that funding means.
- first working point and the second working point differ from each other.
- Containers known from the present technical environment regularly have two identical conveying means or are connected to them, i. d. R. but not more than two.
- the ultrafiltration pump (it is arranged to withdraw liquid from the extracorporeal blood circuit or tubing by generating pressure difference) as a means of funding in its review (as is usually also the case) with maximum delivery, since the
- the delivery rate for this type of pump is usually not
- the sodium pump or the bicarbonate pump can be adjustable and thus at a different working point than z.
- An operating point (also: operating point or state) can be a specific point in the map or on the characteristic of a technical device, which is due to the
- the evaluation should lead to impermissible results. In particular, this includes leaving predetermined limits
- Range of values and / or exceeding a predetermined amount are examples of values and / or exceeding a predetermined amount.
- an alarm or a message can be issued in this regard in some embodiments.
- the blood treatment device can issue a warning or an indication that maintenance, repair or replacement of the conveying means of insufficient conveying accuracy is due. In this way, an exchange can take place at an early stage, ie before it actually occurs, which in turn can advantageously contribute to reducing the downtime of the
- a maintenance or repair of the inadequate funding can be planned in good time and, unlike one than
- the point in time at which maintenance or repair of the inadequate funding should best be tackled can be recognized comparatively early.
- the results of the method according to the invention e.g. B. on the blood treatment device (display) or on an external monitor, display or the like
- the method according to the invention can be recalled in one after its implementation on the blood treatment device
- Results can e.g. B. fed into a network and stored there.
- Devices can be retrieved from.
- a probability for the occurrence of a malfunction due to malfunction of one or each conveyor is determined and communicated according to known methods, e.g. B. by storage in the readable
- Data storage via display, alarm, etc.
- the time or period at which or in which such a fault is likely to occur can be determined and communicated.
- determination may occur. a. the likelihood of a malfunction due to a malfunction of a funding or its time or period of known trend analysis methods.
- Known methods of trend analysis include simple averaging, determination of moving averages, determination of the smallest square deviation, first-order exponential smoothing, etc.
- An optional correction can be a compensation or a shift in such a way that a target power that is to be controlled in the future is a flat rate or by means of the present one
- Promotional activity and target promotional activity is increased, alternatively by another suitable factor.
- An optional correction can be the correction of the
- This may include the correction of a faulty deviation, such as the volume difference detected, determined by a deviation of the final pressure from one
- Expected value of one of the funding to be understood, in particular the increase or decrease in the funding or activity until a target value is reached. Correcting the delivery rate can be, for example, by a
- control of a funding comprises a specification of the target funding activity on at least one of the funding, or for this by specifying at least one number of steps and / or a step angle, or the control consists of this.
- control of a funding comprises or consists of specifying the target funding activity on or for at least one of the funding by specifying at least a number of strokes.
- control of a funding comprises a specification of the target funding activity for at least one of the funding, or for this by specifying a funding period, or consists thereof.
- the container has at least a first and / or a second concentrate container and / or sections of the waste water branch
- a concentrate container can optionally have suction rods for sucking in concentrate.
- the container includes a portion in a fluid conduit
- Dialysis fluid system or consists of.
- the container has at least one line section.
- it has several line sections in fluid communication with one another, which are preferably part of the blood treatment device, in particular its dialysis fluid system.
- Such line sections can be connected to one another in this way
- Fluid communication is one that is in them
- prevailing fluid pressure can set freely within the network of lines.
- the container is a vessel. What is said about the container herein applies to them
- At least one of the funding from the group is optionally an ultrafiltration pump, optionally one is a bicarbonate pump and / or optionally at least one is a sodium pump.
- At least one of the group's conveying means is a positive displacement pump, in particular one
- Diaphragm pump an eccentric diaphragm pump, a gear pump or a piston pump.
- the first, second and / or third conveying means is a diaphragm pump, in particular an eccentric diaphragm pump, a peristaltic pump or a
- the liquid is N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl
- Dialysis fluid On the basis of the evaluation of the measured values of the first pressure measurement and the second pressure measurement alone, it cannot initially be determined whether one of the conveying means is inaccurate and what amounts the deviations have. However, it can be determined whether the delivery rate z. B. the second funding deviates to an unacceptable extent from the delivery rate of the first funding or third funding.
- V_0 P_1 * (V_0 - V_l) (1)
- P 0 is the predetermined initial pressure
- Absolute pressure; P_0 can be measured by means of the first pressure measurement using an absolute pressure meter, it can be calculated or known from other circumstances;
- P 1 is the one after the end of the funding activity of the first
- Conveyor means pressure prevailing in the container, referred to herein as the first final pressure
- V 0 is the initial volume, that is, from the inside of the
- Container contained volume if in it the
- V_1 is the initial volume minus that of the first
- volume of liquid corresponding to V_0 - V_1 could therefore be known from the above given knowledge of the initial volume V_0
- Formula (1) can be calculated. If the volume funded deviates from the volume that the funding would have had to have funded if it had provided the target funding activity, it can be assumed that the funding has deviated or that it is inaccurate. Since the container has a specific compliance, however, which is why
- Funding is filled in a predetermined manner and thus comparable and partially emptied by means of funding.
- the influence z. B. the compliance of the container is eliminated with this procedure. Its volume does not have to be known.
- Results can be obtained if instead of the difference between two ultimate pressures their sum, quotient or product
- Product or quotient can be set up and optional
- z. B. include a constant.
- Absolute pressures here: final pressures
- relative values here pressure differences, formed from the initial pressure and the final pressure.
- P_2 and DR_2 being used instead of P_1 and DR_1.
- P_0 and V_0 also apply to the checking of the second conveying means, since it is assumed here that the pressure in the container is set again to the predetermined pressure P_0 before the second conveying means is checked.
- this is an optional embodiment. It can be
- the first pressure difference, second pressure difference and third pressure difference determined in this way can be compared with one another, for example as described by way of example in the discussion of the figures.
- Delivery accuracy by means of pressure difference can be checked by means of a recalculated compliance.
- An exemplary procedure for this is given below
- Liquid volume AV prevails, the compliance C of the container can be calculated.
- C_3 AV / (P_0 - P_3).
- the three calculated values for the compliances C_l, C_2 and C_3 should be the same, at least not inadmissibly far apart.
- a promotional activity can be discontinuous or
- Discontinuous conveying can be understood to mean conveying by means of repeated pump strokes, the conveying being carried out during an individual
- discontinuous funding examples are diaphragm pumps and piston pumps.
- the pumping activity for these pumps, which must have a constant stroke volume, is set by the number of strokes per unit of time.
- a desired funding volume is funded by a certain number of funding strokes. The cumulative should
- Delivery volume must be the same for all pumps.
- discontinuous conveying means is a pump with a stepper motor that works step by step, i.e. discontinuously.
- conveying work can be set to the stepper motor, for example, by means of a control and computing unit by specifying a step angle per conveying step and a number of steps per unit of time.
- a certain delivery volume can be achieved with such a pump
- control and computing unit can be set, for example, by means of a control and computing unit by specifying a step angle per conveying step and a number of steps on the stepping motor.
- the pump works occlusively so that it does not
- Delivery volume with a gear pump can be set, for example, by specifying a speed and a delivery time to a continuously rotating drive motor, for example a brushless DC motor, by means of one of the control and computing units.
- a continuously rotating drive motor for example a brushless DC motor
- Control device is configured to execute to avoid repetitions on the above
- the method according to the invention takes place or, as a step of the method, none of the three conveying means into the container.
- none of the three promote are of the three promote
- none of the three promote are of the three promote
- each of the subsidies in the context of the method according to the invention always starts from the same initial pressure. There is an increase in the pressure in the container by means of the conveying means
- Embodiments a check meant that a set pump volume, ie the target or target volume, corresponds to the effectively delivered volume, in any case in comparison with the accuracy of other, also considered funding.
- the container is always the same when checking the three funds. The one in it
- the initial pressure prevailing at the start of funding for each of the three grants can always be the same, but this is not necessarily the case.
- absolute values of a single pressure are not considered, but relative values of pressures or differences between pressures. Differences between
- Pressures such as the difference between an initial pressure and an ultimate pressure, are calculated in some embodiments for each of the three conveyors.
- this term can also extend to ascertaining the pressure sought, for example by calculating the pressure from existing quantities.
- a treatment device may, but is not limited to, perform blood treatment, particularly hemodialysis
- Service technician or user checks occur for the first time, early, for example as part of a daily
- the user is not burdened with checking and correcting the conveying capacity of the conveying means. Downtime of the
- Blood treatment devices during the use of a qualified service technician for checking for example by weighing or using measuring cylinders, are not required or are used less frequently. This can be done automatically
- the method according to the invention enables the delivery volumes of the pumps to be checked without much additional effort. This can also occur any damage that may affect pump operation, such. B. detached membranes, for example due to aging processes, can be determined, which is particularly relevant for eccentric diaphragm pumps. The number of time-consuming tests of the pumps by a service technician can thus advantageously be reduced or eliminated entirely.
- Funds of the present invention can be checked, even if none in the blood treatment device
- Mixing chamber especially no mixing chamber with its own Monitoring sensors that could be used to check the funding is provided, as can be the case in some embodiments.
- FIG. 1 a shows a section from FIG. 1, which is limited to the container shown in FIG. 1;
- FIG. 1b shows the parts of the flowchart from FIG. 1 with an illustration of a filling
- Fig. 2 shows an exemplary process of
- Fig. 3b shows an exemplary sequence of the
- Fig. 1 shows parts of a flowchart of a
- Dialysis fluid system 1 also as hydraulics
- the above pumps include u. a. the
- the conveying means F1, F2, F3 are integrated into the dialysis fluid system 1 in fluid communication with one another. They are fluidly connected to one another by means of the lines extracted in bold for FIG.
- the lines connecting them are on the one hand through the funding F1, F2 F3 and on the other hand through Valves V03, V05, V07, V09, Vll, V25 fluidly separated from an exterior.
- the volume limited by means of the above-mentioned funds F1, F2, F3 and valves V03, V05, V07, V09, Vll, V25 thus results in a closed vessel or a combination of closed but communicating lines, in particular line sections, or vessels referred to herein as a container.
- Liquid, etc. would also be conceivable in the context of the present invention instead of "container”.
- container 71 The container shown in Fig. La omitting those elements from Fig. 1 that are not involved in establishing its closed volume is referred to herein as container 71, see Fig. La.
- the three conveying means F1, F2 and F3 are arranged with respect to the container 71 in such a way that they can convey the liquid which is in the container 71 out of it, which they also do in succession when the method according to the invention is carried out.
- the pressure gauge prevailing in the container by means of which, for. B. the first and the second pressure measurement can be carried out, is designated in FIG. 1 by S07. Like any other pressure sensor used, this pressure sensor can optionally have the highest measuring accuracy of all the pressure meters measuring in the container. Pressure gauges other than the one described here
- Pressure sensor S07 can also be used as an alternative.
- the pressure gauge used can be an analog-digital converter (ADC).
- Fig. La shows the container, which is already shown in Fig. 1. Components not shown when the closed container 71 in FIG. 1 came about are not shown again in FIG. 1 a for a better overview.
- FIG. 1b shows the parts of the flowchart from FIG. 1.
- FIG. 1b illustrates by means of the arrows that the container 71 is filled for the first time in such a way that preferably only liquid, but not gas, is present in it. This can be done by means of a liquid source 73, which
- the padding can optionally also come from an external source, for example one
- Liquid source 73 alternatively or additionally
- valve Vll can also be regulated or adjusted via the valve Vll, in particular if the filling has been carried out via an undefined pump.
- the filling is done by opening the valve V09.
- the other valves that limit the container 71 are optionally closed.
- each valve connected to the container 71 can optionally be opened and closed again for filling, in which case the other valves of the container 71 are preferably closed.
- Fig. 2 shows an exemplary sequence of the
- the process begins at tO after the initial pressure P_0 (or: outlet pressure) has been set in the container 71, which can be done by means of the liquid source 73 and, if necessary, checked by means of the pressure meter S07.
- the first conveying means Fl delivers liquid out of the container 71 in accordance with the activated conveying activity, which is why the pressure meter S07 or another one
- Container 71 prevailing pressure on P_l, the first final pressure.
- the second conveying means F2 is now conveying, which is why a pressure P_2 which is lower than the initial pressure P_0 is present as a new, second end value in the container 71
- the third conveying means F3 finally conveys liquid out of the container 71, which leads to a new, third final pressure P_3.
- Liquid is conveyed out of the container 71 as the first conveying means F1, but significantly more than the third
- the evaluation of the three final pressures P_l, P_2 and P_3 can now lie, for example, in the answer to the question (or include this) as to whether or not these three final pressures lie within a predetermined limit value window 91. If they are all within the permissible limit value window 91, it can be determined in this case, for example, that the conveying accuracy of none of the three conveying means F1, F2 and F3 deviates from a permissible level.
- Funding may differ. Changes affecting the volume of the container, the compliance of the container, e.g. B. can change after replacement of a line in the course of maintenance or repair, etc. have no influence on the inventive method. Such changes must
- Fig. 3a shows the basis for an alternative evaluation, based on the final pressures P_l, P_2 and P_3 assumed for FIG. 3.
- this alternative evaluation it is not the relative position of the three ultimate pressures, but the relative position of the three pressure differences DR_1, DR_2, DR_3 relative to one another
- Fig. 3b shows the basis for yet another
- Embodiments are as described herein.
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Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019101941.9A DE102019101941A1 (de) | 2019-01-25 | 2019-01-25 | Verfahren zum Überprüfen der Fördergenauigkeit von Fördermitteln einer medizinischen Behandlungsvorrichtung, und Vorrichtungen |
| PCT/EP2020/051645 WO2020152276A1 (de) | 2019-01-25 | 2020-01-23 | Verfahren zum überprüfen der fördergenauigkeit von fördermitteln einer medizinischen behandlungsvorrichtung, und vorrichtungen |
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|---|---|
| EP3914314A1 true EP3914314A1 (de) | 2021-12-01 |
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|---|---|---|---|
| EP20702250.0A Pending EP3914314A1 (de) | 2019-01-25 | 2020-01-23 | Verfahren zum überprüfen der fördergenauigkeit von fördermitteln einer medizinischen behandlungsvorrichtung, und vorrichtungen |
Country Status (5)
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|---|---|
| US (1) | US12214112B2 (de) |
| EP (1) | EP3914314A1 (de) |
| CN (1) | CN113365677A (de) |
| DE (1) | DE102019101941A1 (de) |
| WO (1) | WO2020152276A1 (de) |
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| DE102020119654A1 (de) | 2020-07-24 | 2022-01-27 | Fresenius Medical Care Deutschland Gmbh | Verfahren zum Überprüfen der Funktionsfähigkeit von Fördermitteln einer medizinischen Behandlungsvorrichtung, und Vorrichtungen |
| DE102021107396A1 (de) * | 2021-03-24 | 2022-09-29 | Fresenius Medical Care Deutschland Gmbh | Medizinische Behandlungsvorrichtung mit Verschleißüberwachung für deren Unterdruckquelle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5629871A (en) | 1995-06-07 | 1997-05-13 | Cobe Laboratories, Inc. | Wear trend analysis technique for components of a dialysis machine |
| DE102005013418A1 (de) * | 2005-03-23 | 2006-09-28 | B. Braun Medizintechnologie Gmbh | Blutbehandlungsgerät mit Alarmvorrichtung |
| DE102011106113B4 (de) | 2011-06-09 | 2013-11-21 | Fresenius Medical Care Deutschland Gmbh | Verfahren und Vorrichtung zum Überprüfen der Förderleistung mindestens eines ersten und eines zweiten Fördermittels einer Vorrichtung zur extrakorporalen Blutbehandlung |
| DE102011106111B4 (de) * | 2011-06-09 | 2013-11-21 | Fresenius Medical Care Deutschland Gmbh | Verfahren und Vorrichiung zum Bestimmen mindestens eines vom Absolutdruck abhängigen Betriebsparameters einer Vorrichtung zur extrakorporalen Blutbehandlung, Vorrichtung zur extrakorporalen Blutbehandlung |
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2020
- 2020-01-23 CN CN202080010975.6A patent/CN113365677A/zh active Pending
- 2020-01-23 US US17/424,717 patent/US12214112B2/en active Active
- 2020-01-23 EP EP20702250.0A patent/EP3914314A1/de active Pending
- 2020-01-23 WO PCT/EP2020/051645 patent/WO2020152276A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| CN113365677A (zh) | 2021-09-07 |
| US20220008634A1 (en) | 2022-01-13 |
| US12214112B2 (en) | 2025-02-04 |
| DE102019101941A1 (de) | 2020-07-30 |
| WO2020152276A1 (de) | 2020-07-30 |
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