EP4313198A1 - Medizinische extrakorporale blutbehandlungsvorrichtung mit verschleissüberwachung für deren unterdruckquelle - Google Patents
Medizinische extrakorporale blutbehandlungsvorrichtung mit verschleissüberwachung für deren unterdruckquelleInfo
- Publication number
- EP4313198A1 EP4313198A1 EP22718107.0A EP22718107A EP4313198A1 EP 4313198 A1 EP4313198 A1 EP 4313198A1 EP 22718107 A EP22718107 A EP 22718107A EP 4313198 A1 EP4313198 A1 EP 4313198A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- medical treatment
- treatment device
- control
- evaluated
- 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
-
- 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
Definitions
- the present invention relates to a medical treatment device according to claim 1, a control or regulation device according to claim 9, also a digital storage medium according to claim 10, a computer program product according to claim 11 and a computer program according to claim 12 or according to the generic terms or generic terms of these Expectations.
- Medical treatment devices are known whose operation, at least occasionally, requires the use of compressed air below atmospheric pressure.
- Such medical treatment devices include, for example, some blood treatment devices which are used in particular for hemodialysis, hemofiltration and hemodiafiltration. What they have in common is that during the extracorporeal blood treatment carried out with them, the blood to be treated flows along an extracorporeal blood circuit and through a blood treatment unit.
- the blood treatment unit is a dialyzer or filter which, to put it simply, is divided 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 the dialysis fluid chamber.
- the pumping accuracy of the vacuum source used to generate vacuum air usually a compressor, can change over time and the duration of its use, and the vacuum source can ultimately even fail.
- Causes for observed changes can be leaks, swelling of materials, deposits inside the conveyor and/or the lines and wear. While leaks can easily be detected with certainty using an automatic integrity test, for example a pressure-holding test, the extent of wear and tear that occurs over time is not readily detectable with the known tests for leaks.
- the negative pressure sources provided for this purpose are designed to be so robust that operational wear and tear during their service life is as low as possible.
- the vacuum source's ability to build up the vacuum may change over time.
- a digital storage medium, a computer program product and a computer program should be specified. The object according to the invention is achieved by the medical treatment device having the features of claim 1 . It is also achieved by means of the control or regulating device having the features of claim 9, the digital storage medium having the features of claim 10, the computer program product having the features of claim 11 and the computer program having the features of claim 12.
- a medical treatment device which in each case has at least one vacuum line, a vacuum source, a pressure measuring device, a determination device, an output device, a memory device, a readout device, and at least one control or regulating device or is connected to them.
- the negative pressure source which is a compressor, for example, is in fluid connection or delivery connection with the negative pressure air line in order to be able to build up or change a negative pressure there.
- Vacuum line pressure values are measured, which serve to obtain a pressure value curve over time.
- a pressure value profile is at least a first pressure value and a second pressure value (or more than two pressure values), which prevail in the vacuum line at a first point in time or a second point in time that differs from the first point in time and are measured—individually, in multiples, or together or could be measured.
- the determination device is configured to determine at least one variable to be evaluated from the pressure value profile measured by the pressure measuring device or from the pressure value profile generated by the vacuum source.
- the output device is configured to output values and/or signals, e.g. B. alarms to issue.
- At least one reference pressure profile or at least one reference value related to or obtained from a reference pressure profile is stored or kept available in the memory device.
- At least one measure is stored in the storage device, which is assigned to the variable of the pressure value profile to be evaluated and which indicates an existing wear of the vacuum source.
- the read-out device is configured to read out the at least one stored reference pressure profile, the at least one reference value or the associated measure from the storage device.
- the control or regulating device is configured to generate, build up or change negative pressure in the negative pressure air line by means of the negative pressure source. It is further configured to measure a
- control or regulating device is configured to use the determination device to evaluate a variable to be determined from the pressure value curve measured by means of the pressure measuring device.
- the open-loop or closed-loop control device can also be configured to output this variable.
- the control or regulating device is further configured to use the readout device to read out the at least one stored reference pressure curve, the at least one reference value (corresponding to the variable to be evaluated) from this reference pressure curve or a measure from the storage device that is associated with the variable to be evaluated.
- control or regulation device is configured to output a result of a comparison, determined by means of the control and regulation device, between the read-out reference value on the one hand and the variable to be evaluated on the other hand or the assigned measure. This is done by the output device.
- Determining or determining, in particular of data or values can include examining the existence or non-existence, obtaining, detecting, measuring, evaluating, processing, comparing, estimating, assessing or estimating, developing, be or include calculating, achieving, collecting, achieving and/or recognizing.
- Proposed control device as defined herein.
- the steps disclosed herein can all, some or some, be initiated or executed by means of the control or regulation device of the medical treatment device.
- a control or regulating device in particular a control or regulating device according to the invention, can be included in the medical treatment device according to the invention or can be connected to it.
- the control or regulating device is configured to initiate, carry out, control and/or regulate the steps disclosed herein—in particular automatically—through interaction with further devices or devices of the medical treatment apparatus, in particular as disclosed herein.
- Interaction can be or include driving, controlling or regulating. Interaction may be or require a signal connection.
- the medical treatment device according to the invention can have a correspondingly suitable and/or configured facility or device such as a B. have an evaluation unit for the evaluation, a pressure measuring device for the pressure measurement, etc. or be connected to such devices or devices.
- An inventive, in particular digital, in particular non-volatile, storage medium in particular in the form of a diskette, RAM, ROM, CD, hard drive, DVD, USB stick, flash card, SD card, EPROM or NOVRAM, in particular with control signals that can be read electronically or optically, can be configured in such a way that a control or regulation device can be configured into a control or regulation device according to the invention.
- the digital storage medium can be configured in order to configure a medical treatment device into a medical treatment device according to the invention.
- a computer program product according to the invention has a volatile program code or a program code stored on a machine-readable carrier, by means of which a control or regulating device is configured into a control or regulating device according to the invention.
- a medical treatment device can be configured into a medical treatment device according to the invention by means of the computer program product.
- machine-readable medium refers to a medium that contains data or information that can be interpreted by software and/or hardware.
- the medium 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 a program code by which a control or regulating device becomes a control or regulating device according to the invention or a medical Treatment device is configured to a medical treatment device according to the invention.
- a computer program product can be, for example, a computer program stored on a carrier, an embedded system as a comprehensive system with a computer program (e.g. an electronic device with a computer program), a network of computer-implemented computer programs (e.g. client/server system , cloud computing system, etc.) or a computer on which a computer program is loaded, run, stored, executed or developed.
- a computer program stored on a carrier
- an embedded system as a comprehensive system with a computer program
- a network of computer-implemented computer programs e.g. client/server system , cloud computing system, etc.
- a computer program can be understood, for example, as a physical, salable software product which has a program.
- the object according to the invention has one or more features in a specific embodiment, it is also disclosed herein that the object according to the invention expressly does not have this or these features in other embodiments that are also according to the invention, e.g. B. in the sense of a disclaimer.
- the contrary embodiment for example formulated as a negation, is also disclosed.
- Embodiments according to the invention can have one or more of the features mentioned above and/or below in any technically possible combination.
- the medical treatment device comprises an evaluation device or is connected to one.
- the evaluation device is configured to assign a measure of wear to the result of the comparison between the reference value read out on the one hand and the variable to be evaluated on the other hand.
- the control or regulating device is further configured to cause the evaluation device to assign a degree of wear to the result of the comparison between the reference value read out on the one hand and the variable to be evaluated on the other hand, by means of the evaluation device.
- a measure determined in this way can in turn be output by means of the output device.
- the at least one reference value and/or the variable to be evaluated is a time value read or measured from the pressure value curve, for example the time it takes to reach a predetermined negative pressure value, e.g. B. the lower vacuum threshold elapses.
- the reference value is a mathematical parameter of the pressure value curve, for example an angle determined or determinable from the pressure value curve, a slope of the curve in a diagram, etc.
- control or regulating device is configured to determine whether the corresponding variable from the measured pressure value curve, the result of the comparison and/or the degree of wear is within predetermined limits, exceeds or falls below a limit value, exceeds a minimum value and/or does not exceed a maximum value or the evaluating or comparing consists of this. This results in an evaluation z. B. based on a criterion (limit, range, maximum, etc.). As a criterion, for example for issuing an alarm, z. B. be evaluated whether an angle is less than a predetermined degree and / or whether the time required to build up vacuum exceeds a predetermined duration and/or the like.
- the result of the evaluation or comparison is or includes a quantitative indication, for example an indication in percent, for example based on the reference value.
- control or regulation device is configured to output an acoustic and/or visual alarm by means of the output device.
- the alarm is output e.g. B. when the evaluation leads to results that were previously defined as inadmissible, in particular when leaving predetermined limits, in particular when falling below the lower limit or exceeding the upper limit, when leaving a permissible value range, when exceeding a predetermined amount.
- results defined as impermissible can be stored, for example in the storage device mentioned herein.
- the medical treatment device has a memory device or is connected to it, in which the control or regulating device stores the result of the evaluation or comparison or is programmed to do so, for example in the memory device mentioned herein for e.g. B. the reference value.
- the previously measured pressure value curves are also taken into account in the evaluation by means of the evaluation device pull or to include in the determination of the degree of wear.
- This memory device can be part of the medical treatment device, for example in an area that is regularly read during maintenance activities. However, you can also far from the medical treatment device z. B. be arranged at a place entrusted with the maintenance or monitoring of the treatment device.
- the controller is configured to determine, e.g. B. Calculate a wear curve versus time for the vacuum source from the stored results or measurements. Alternatively, it is configured to cause this determination.
- various pressure curves can be evaluated, for example in order to determine and optionally quantify a trend at an early stage on the basis of their slope or other properties - i.e. medium- or long-term developments.
- the stored curves or a wear curve based on them can be used, e.g. B. be read by a service technician.
- the data storage can be on an external device.
- results can B. fed into a network and stored there. If necessary, the results can then be called up from several devices.
- a probability of the occurrence of a fault due to wear and tear of the vacuum source is determined and communicated using known methods, e.g. B. by storage in the readable data memory, by display, alarm, etc.
- the point in time or period of time at which or in which such a fault is likely to occur can be determined and communicated.
- determining includes, but is not limited to: known methods of trend analysis are used to determine the probability of a fault occurring due to wear of the vacuum source or its point in time or time period.
- the hardware or software required to carry out the aforementioned determination of probability, point in time/period of time and/or the presentation and/or transmission of the resulting results and the like is optionally provided and set up, configured and/or programmed accordingly.
- Well-known methods of trend analysis include simple averaging, moving averages, least squares, first-order exponential smoothing, etc.
- the medical treatment device is designed as a blood treatment device, in particular as a hemodialysis device, hemofiltration device,
- Hemodiafiltration device or as a device for performing a separation process Hemodiafiltration device or as a device for performing a separation process.
- the reference value or reference pressure curve as disclosed herein can e.g. B. are or have been stored by the manufacturer during production or by the technician during commissioning in the memory device, which in turn can be part of the vacuum source or the medical treatment device that has the vacuum source.
- the invariable reference value or the reference pressure curve can be read from it when the steps mentioned here are carried out.
- Reference values can be stored, for example, in a non-volatile random access memory (NOVRAM);
- NOVRAM is a memory module that, due to the principle of operation, can be written to cyclically, but in which the last valid data content is saved in the internal ROM area in the event of an external power failure.
- a capacitor integrated into a NOVRAM provides the energy required to copy the content of the RAM area, which is also integrated in the NOVRAM, into the ROM area if the externally applied voltage fails.
- Treatment device issue a warning or notice that maintenance, repair or replacement of the vacuum source is pending due to wear.
- an exchange can be made in good time, ie before a complete failure that actually occurs, which in turn can advantageously contribute to reducing the downtime of the treatment device.
- Maintenance or repair of the vacuum source can be scheduled early and thus, unlike maintenance that takes place as a reaction, not at the wrong time, ie at a possibly inappropriate time.
- a worn vacuum source can be identified according to the invention without a dedicated test during the vacuum generation that is regularly required for normal operation of the medical treatment device, the point in time at which maintenance or repair of the vacuum source should best be tackled can be identified comparatively early.
- the point in time at which the operation of the medical treatment device will be disrupted due to the worn vacuum source can advantageously be largely predicted by means of the present invention using a corresponding evaluation of the measured values or results collected.
- the results of the evaluation are displayed on or by means of the output device, e.g. B. shown or printed on the treatment device (display) or on an external monitor, display or the like.
- control device is further configured to prevent a treatment option using the medical device and/or to To stop the pump of the medical device, preferably a pump which promotes medical liquid, in particular dialysis liquid.
- a treatment option using the medical device and/or to To stop the pump of the medical device, preferably a pump which promotes medical liquid, in particular dialysis liquid.
- this term can also extend to the determination of the pressure sought, for example by the pressure being calculated from the variables that are present.
- a signal or communication connection between two components can be understood to mean a connection that exists during use. This can also be understood to mean that there is a preparation for such a signal connection (wired, wireless or implemented in some other way), for example by coupling both components, for example by means of pairing, etc.
- Pairing is a process that takes place in the context of computer networks to create an initial link between computer units for the purpose of communication.
- the best-known example of this is the establishment of a Bluetooth connection, by means of which different devices (e.g. smartphone, headphones) are connected to one another. Pairing is also sometimes referred to as bonding.
- the quantity to be evaluated is not or does not include torque or pump speed.
- the vacuum source is not a piston pump and/or a centrifugal pump.
- the vacuum source is not a liquid pump or is not used to pump liquids.
- the negative pressure source is not a central vacuum facility, such as a hospital.
- the negative pressure source is preferably part of the medical treatment device, e.g. B. from the housing.
- the suction side of the compressor referred to herein is used as the vacuum source.
- the pressure side of the compressor, z. B. with appropriate line of compressed fluid, use of a Venturi nozzle and / or the like, can be used as a vacuum source.
- the controller is not programmed to determine displacement of a piston of a pump using piston displacement sensors to determine wear.
- a further advantage of the invention can consist in the fact that a medical treatment device is enabled to automatically check its negative pressure source. The use of a qualified service technician or a user is not required for this, which can help to save costs.
- deviations in the pumping activity of a vacuum source that occur for the first time between visits by the qualified service technician or checks by the user can be detected at an early stage, for example as part of a daily routine check or use of the medical treatment device during treatment.
- Another advantage can be the improvement in the user-friendliness of a generic treatment device. According to the invention, the user is not burdened with checking the vacuum source. downtime of
- In-situ treatment devices are minimized, if not eliminated, by the present invention.
- Fig. 1 shows a in a greatly simplified representation
- Fig. 2 shows two exemplary pressure value curves in a pressure-time diagram during the build-up of a vacuum and the output of a measure of the wear of the vacuum source building up the vacuum in each case;
- Fig. 3 shows a quantitative assessment of the
- Fig. 4 shows, in a greatly simplified representation, a flow chart of further components of a medical device according to the invention
- FIG. 1 shows, in a highly simplified representation, a flowchart or flow chart of a medical treatment device 100 according to the invention in a first embodiment.
- the majority of the medical treatment device 100 is shown as a "black box". It includes both the blood side with its extracorporeal blood circuit and the hydraulic side with a wide variety of lines, pumps, valves and the like.
- the "black box” also includes a blood filter, via which the blood side and the hydraulic side are connected. Reference is made to FIG. 4 for details of a possible embodiment of the medical treatment device 100 .
- Medical treatment device 100 is in fluid connection or conveying connection to a vacuum source 1 by means of a vacuum line 3 in order to build up or change a vacuum in vacuum line 3, caused by a control or regulating device 50.
- a pressure measuring device DS is arranged on or in the vacuum line 3 for measuring the pressure prevailing within the vacuum line 3.
- a pressure value curve Px (see the pressure value curves PI, P2 of the following figures) can be determined.
- a pressure value profile Px can thus be understood here as a series of pressure values that can be connected to form a continuous profile, for example by Interpolation and extrapolation, which z. B. could be represented graphically as a curve or line, as was done for the pressure value profiles PI, P2 of FIGS. 2 and 3 .
- a determination device 9 that is also provided is used to determine at least one variable Ati, a1, At2, a2, etc. to be evaluated from the pressure value profile PI, P2 measured by the pressure measuring device DS.
- the determination device 9 determines the measured Pressure value profile PI has a value Ati or, for the measured pressure value profile, the value ht2.
- the variable to be evaluated is an angle which results from the geometric progression of the measured pressure value progression PI or P2
- the determination device 9 is used, for example, to determine the angle a1 in Fig. 2 or the corresponding angle a1 for the pressure value progression PI, or from this, or a2 is determined for the pressure value profile P2 as the variable to be evaluated.
- a memory device 5 is optionally a) at least one reference pressure curve, from which a reference to the evaluative variable hti, al, t 2, OL2, des
- pressure value curve PI, P2 suitable reference value can be determined, b) a reference value for variable Ati, ⁇ , A i, a2,..., to be evaluated, usually already related to a reference pressure curve or obtained from it, and/or c) at least one measure (given here as an example in "%"), which is assigned to the variable Ati, a ⁇ , D0 2 , a2,... of the pressure value curve PI, P2 to be evaluated.
- the measure gives a value at the time of measuring the pressure value curve PI, P2 present wear and tear of the checked vacuum source 1 depending on the value or magnitude of the variable to be evaluated Ati, a ⁇ , D0 2 , a2,... an.
- the contents according to a), b) and c) can each be used alternatively or in addition to each other in be stored in the storage device 5 .
- the reference value can thus z.
- B. a time required for the construction of a predetermined negative pressure, an angle specification for the angle between the reference pressure curve and z.
- the reference pressure curve which is not shown in the figures, and the corresponding reference value, which was or can be obtained from the reference pressure curve, are used in some embodiments as a comparison variable for the value or the characteristic of the variable to be evaluated, which is determined using the
- Determination device 9 was determined and which is shown in FIG. 2 as hti or a1 for the pressure value curve PI or as ht2, a2 for the pressure value curve P2.
- the reference pressure curve can, for. B. be a pressure value profile recorded at a vacuum source 1 in the new state.
- the pressure value curve PI shown in FIGS. 2 and 3 could serve as a reference pressure curve.
- a read-out device 7 is provided and configured to read out values from the storage device 5, in particular the at least one reference value stored in it, the reference pressure curve stored in it, in order to determine a reference value therefrom, or the measure of the wear stored in it, which in can be stored in the memory device 5 for different characteristics or values of the variable to be evaluated, assigned to it in each case.
- An evaluation device 11 is optionally present and configured to associate a measure of wear with a result that can be obtained when the variable to be evaluated is related or compared to the reference value.
- the control or regulating device 50 can correspond to a control or regulating device 150 indicated here of the medical treatment device 100 or be present separately from it, but at least with a signal connection.
- the control or regulating device 50 is also configured to cause the pressure measuring device DS to measure a negative pressure prevailing in the vacuum air line 3, as a result of which the measured pressure value profile PI, P2 is determined. Furthermore, the control or regulating device 50 is configured to have the at least one stored reference value read out by means of the read-out device 7, in order to have the reference value read out from the stored reference pressure profile or to have the dimension assigned to the variable to be evaluated read out. This is read out in each case from the memory device 5.
- control or regulation device 50 is configured to cause the determination device 9 to determine the variable to be evaluated from the measured pressure value profile PI, P2.
- control or regulating device 50 acts accordingly on the evaluation device 11 provided for this purpose.
- the controller 50 is also configured to cause a result of the comparison or the amount of wear to be output. You can use an output device 55 for this purpose.
- the output device 55 is part of the medical treatment device 100, as is optionally also any other device shown in FIG. 1. In other embodiments, it is separate therefrom. Dispensing device 55 and treatment device 100 are preferably in signal connection, which in turn can optionally also apply to any other device shown in FIG. 1 .
- the control or regulating device 50 is configured to have an acoustic and/or optical, haptic or other alarm output by means of the output device 55 should the evaluation lead to results which were previously defined as an alarm case. Such results can be, in particular, those which lie outside predetermined limits, in particular fall below a lower limit value or exceed an upper limit value, leave a permissible value range and/or exceed a predetermined amount.
- the arrows in FIG. 1 represent non-limiting signal connections, in particular data connections, which can be implemented with cables or wirelessly.
- FIG. 1 the devices described above are shown alongside the medical treatment device 100 . It can be covered by the present invention that one, some or all of these devices are integrated in the medical treatment device 100, or at least in its housing.
- Fig. 2 shows an example of the two pressure value curves PI, P2 already mentioned above in a pressure-time diagram, which were measured during the build-up of negative pressure in the negative pressure line 3 .
- PI, P2 already mentioned above in a pressure-time diagram
- One or more variables can be determined for each of the measured pressure value curves PI, P2, which are to be evaluated with the aim of getting to know the state of wear of the vacuum source 1.
- the variable to be evaluated can, as stated above, e.g. B. an angle or a period of time, for which reference values (as angles or periods of time) can be stored in the memory device 5, or for which suitable reference values can be read out from an optionally stored reference pressure curve (in this case again an angle or a period of time). or can be measured or otherwise determined.
- a comparison of the variable to be evaluated with the corresponding reference value can allow a statement about the wear of the vacuum source 1 with a suitable evaluation.
- Atid corresponds to the length of time that a new vacuum source 1 needs to build up the vacuum, which is why the pressure curve PI is considered below as the reference pressure curve, while Dt2 is the length of time that a vacuum source 1 needs to build up the vacuum, which due to its repeated use already shows signs of wear.
- a qualitative and/or quantitative value for indicating the current state of wear of the vacuum source 1 can be determined from this in comparison with the time Ati, which is discussed here as an example of a reference value.
- the angle al corresponds to the angle at which the pressure value profile PI of a vacuum source 1 with a first capacity (e.g. the capacity of a new vacuum source) intersects the lower control limit LL (or another reference line or straight line) during the Angle a2 is the angle at which the pressure value curve P2 of a vacuum source 1 with a second capacity different from the first (e.g. the capacity of a vacuum source that has been in use for a certain time) intersects this lower control limit LL.
- a first capacity e.g. the capacity of a new vacuum source
- variable to be evaluated can be a statement to be made about the wear of the vacuum source 1, but also just looking at the variable to be evaluated (angle, time, etc.) and reading out one of its magnitude or value in the memory device 5 associated degree of wear.
- the latter can e.g. B. by means of a table, data records or the like. Reference values are not required for this.
- a corresponding qualitative and/or quantitative statement on the degree of wear or an alarm can be output by means of the control or regulating device 50 via the output device 55 .
- any specification that describes the shape or curve (slope, curvature, etc.) that is suitable for describing the pressure value curve PI, P2 can be understood as a variable to be evaluated be, and in this case value stored as a reference value can correspond to the size determined in this way.
- the measured pressure value profile PI, P2 as such can already be compared with a reference pressure profile as such stored in the storage device 5 .
- a measure of wear can in turn be assigned to the result of this comparison.
- the form of the measured pressure value profile PI, P2 can therefore already be understood as a variable to be evaluated.
- Fig. 3 shows a quantitative assessment of the
- the lower control limit LL and an upper control limit UL are limit values which, in some embodiments, regularly play a role in the intended use of the treatment device 100, since negative pressure is always built up again when the negative pressure prevailing in the negative pressure line 3 exceeds the upper Exceeds control limit UL, i.e. the prevailing negative pressure has reduced to this value and must be built up again.
- the negative pressure source 1 is caused by the control or regulating device 50 to start, as intended.
- other reference pressures or reference pressure curves can also be used to carry out the present invention.
- the time Dt2 of the pressure value curve P2 that elapsed to build up the same negative pressure (here: around -650 mbar) to reach the lower control limit LL is longer than the time Ati that was required for the pressure value curve PI. It is noted that the values Ati and At2 in the diagram of FIG. 2 stand for a period of time which has elapsed between the beginning of the (negative) pressure build-up and reaching a predetermined negative pressure, whereas in FIG. 3 they indicate the end of that period. The point in time at which the vacuum source 1 started to build up the vacuum is not specifically indicated in FIG. 3 .
- results of the comparison or the evaluation can be quantified using known methods, for example with an indication as a percentage based on a reference value based on empirical values.
- the pressure value profile PI would result in a higher percentage determined from parameters of the pressure value profile PI for describing a first performance when falling below the lower control limit LL, e.g. B.
- the percentage can represent or be associated with a quantitative statement, for example about the performance, the remaining service life and/or the like. Such numbers or assignments can be based on empirical values. You can e.g. B. be in tabular form and / or stored in the memory device 5. A predetermined percentage can be a criterion for an alarm output.
- the value or amount of the variable to be evaluated or the degree of wear of the vacuum source 1 determined for this purpose can be stored by the control or regulating device 50 according to the invention in the memory device 5 or another memory device (not shown in the figures). Such storage can also take place if an alarm has occurred.
- the wear curve can be stored in such a way that it is can be read out or displayed by a service technician.
- FIG. 4 shows a flow chart of further components of an embodiment of the medical treatment device 100 according to the invention, here a blood treatment device, connected to an extracorporeal blood circuit 300, which can be used for treatment by means of double-needle access, or using e.g. B. an additional Y-connector (reference Y) can be connected to the vascular system of the patient, not shown, by means of single-needle access.
- the blood circuit 300 can optionally be present in sections thereof in or on a blood cassette, which is referred to here as an example of a disposable.
- Pumps, actuators and/or valves in the area of the blood circuit 300 are connected to the treatment device 100 according to the invention or to one of these, e.g. B. included control device 150 connected.
- the blood circuit 300 includes (or is connected to) an arterial patient tubing clamp 302 and an arterial connection needle of an arterial segment or arterial patient line, blood sampling line or first line 301 .
- the blood circuit 300 also has a venous
- a blood pump 101 is provided in or on the first line 301, a substituate pump 111 is provided with a dialysis liquid supply line 104 for conveying fresh dialysis fluid, which is filtered in a further filter stage (F2) (substituate), connected.
- a substituate line 105 can be fluidically connected to the dialysis liquid feed line 104 .
- substituate can be introduced by pre-dilution, via a pre-dilution valve 107, or by post-dilution, via a post-dilution valve 109, via associated lines 107a or 109a into line sections, for example into the arterial line section 301 or into the venous line section 305 (here between a Blood chamber 303b of a blood filter 303 and a venous air separation chamber or venous blood chamber 329) of the blood circuit 300 are introduced.
- the blood filter 303 has the arterial line section 301 and the venous
- a dialysis fluid chamber 303a of the blood filter 303 is connected to the dialysis fluid inlet line 104 leading to the dialysis fluid chamber 303a and a dialysate outlet line 102 leading away from the dialysis fluid chamber 303a and carrying dialysate, ie used dialysis fluid.
- Dialysis fluid chamber 303a and blood chamber 303b are separated from one another by a mostly semi-permeable membrane 303c. It represents the separating sheath between the blood side with the extracorporeal blood circuit 300 and the machine side with the dialysis liquid or dialysate circuit, which is shown on the left of the membrane 303c in FIG.
- the dialysis liquid supply line 104 is optionally in fluid connection with a compressor 175.
- the arrangement of Figure 4 includes an optional detector 315 for detecting air and/or blood.
- the arrangement of FIG. 4 also includes one or two pressure sensors PSI (upstream of the blood pump 101) and PS2 (downstream of the blood pump 101, it measures the pressure upstream of the blood filter 303 ("pre-hemofilter")) at the one shown in FIG Additional pressure sensors can be provided, e.g. the pressure sensor PS3 downstream of the venous blood chamber 329.
- An optional single-needle chamber 317 is used in FIG. 4 as a buffer and/or compensating container in a single-needle method, in which the patient is connected to the extracorporeal blood circuit 300 by only one of the two blood lines 301, 305 .
- the arrangement of Figure 4 also includes an optional detector 319 for detecting air bubbles and/or blood.
- An addition point 325 for heparin or another anticoagulant can optionally be provided.
- Blood leaving the blood filter 303 flows through an optional venous blood chamber 329 which may have a vent 318 and be in fluid communication with the pressure sensor PS3.
- a mixing device 160 which from the containers A (for A concentrate via the concentrate supply 166) and B (for B concentrate via the concentrate supply 168) a predetermined mixture for the respective solution for use by the Treatment device 100 provides.
- the solution contains, in z. B. the heater 162 heated water (online, e.g. as reverse osmosis water or from bags) from the water source 155.
- a pump 171 which may be referred to as a concentrate pump or sodium pump, is fluidly connected to and/or pumps from the mixing apparatus 160 and a source of sodium, such as container A.
- a negative pressure source for building up negative pressure can be seen, for example, in the optional negative pressure source with the reference number 1, which is also referred to here as a non-limiting compressor as a compressor, which is here used, for example, by means of the negative pressure line 3 in connection with the port 1000 and/or with the additional port 1000'.
- Alternative pressure sources in particular vacuum air sources, can be provided.
- a drain 153 for the effluent can also be seen in FIG. 4 .
- An optional heat exchanger 157 and a first flow pump 159 suitable for degassing complete the arrangement shown.
- Another pressure sensor can be provided as PS4 downstream of the blood filter 303 on the water side, but preferably upstream of the ultrafiltration pump 131 in the dialysate discharge line 102 to measure the filtrate pressure or membrane pressure of the blood filter 303 . Further, optional pressure measuring points P can also be provided.
- the exemplary arrangement shown in FIG. 4 has a control and/or regulating device 150 . It can be in a wired or wireless signal connection with any of the components mentioned here—at least or in particular with the blood pump 101—for controlling or regulating the treatment device 100 .
- the sodium content thereof can be varied within certain limits, controlled by the control device 150 .
- the measured values determined by means of conductivity sensors 163a, 163b can be included for this purpose. Should this result in an adjustment of the sodium content of the dialysis fluid
- the treatment device 100 includes means for conveying fresh dialysis fluid and dialysate.
- a first valve V24 can be provided between the first flow pump 159 and the blood filter 303, which opens or closes the inlet to the blood filter 303 on the inlet side.
- a second, optional flow pump 169 is z. B. provided downstream of the blood filter 303, which promotes dialysate to and / or through a drain line 153.
- a second valve V25 can be provided between the blood filter 303 and the second flow pump 169, which opens or closes the outlet on the outlet side.
- the treatment device 100 optionally includes a device 161 for balancing in the Dialyzer 303 inflowing and outflowing flow on the machine side.
- the device 161 for balancing is preferably arranged in a line area between the first flow pump 159 and the second flow pump 169 .
- the treatment device 100 also includes means for the precise removal of a volume of liquid specified by the user and/or by the control device 150 from the balanced circuit, such as the ultrafiltration pump 131.
- Sensors such as the optional conductivity sensors 163a, 163b can also be provided to determine the, in some embodiments temperature-compensated, conductivity and the liquid flow upstream and downstream of the dialyzer 303.
- Temperature sensors 165a, 165b can be provided individually or in groups. Temperature values they provide can be used to determine a temperature-compensated conductivity. They can also be provided to monitor the temperature of the dialysis liquid or the dialysate.
- a number of optional valves are each labeled V in FIG.
- control device 150 determines the electrolyte and/or liquid balance based on the measured values of the aforementioned, optional sensors.
- Filter F1 and F2 can be connected in series.
- the filter F1 is used here, for example, to produce sufficiently pure dialysis fluid by means of the mixing device 160 itself using non-sterile water. B. in the countercurrent principle, through the blood filter 303 flows.
- the filter F2 is used here, for example, to remove, by filtering z. B. pyrogenic substances to generate sterile or sufficiently filtered substituate, which can safely be fed to the extracorporeal flowing blood of the patient and thus ultimately the patient's body.
- the treatment device 100 is shown in FIG. 4 as an optional device for hemo(dia)filtration.
- hemodialysis devices also fall within the scope of the present invention, although not specifically illustrated by means of the figure.
- the present invention is not limited to the embodiment described above, which is merely illustrative.
- the arrowheads shown in FIG. 4 generally indicate the direction of flow, respectively.
- PSI arterial pressure sensor (optional)
- PS2 arterial pressure sensor (optional)
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- Heart & Thoracic Surgery (AREA)
- Urology & Nephrology (AREA)
- Anesthesiology (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Emergency Medicine (AREA)
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- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
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Abstract
Description
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Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021107396.0A DE102021107396A1 (de) | 2021-03-24 | 2021-03-24 | Medizinische Behandlungsvorrichtung mit Verschleißüberwachung für deren Unterdruckquelle |
| PCT/EP2022/057609 WO2022200414A1 (de) | 2021-03-24 | 2022-03-23 | Medizinische extrakorporale blutbehandlungsvorrichtung mit verschleissüberwachung für deren unterdruckquelle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4313198A1 true EP4313198A1 (de) | 2024-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22718107.0A Pending EP4313198A1 (de) | 2021-03-24 | 2022-03-23 | Medizinische extrakorporale blutbehandlungsvorrichtung mit verschleissüberwachung für deren unterdruckquelle |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20250032686A1 (de) |
| EP (1) | EP4313198A1 (de) |
| JP (1) | JP2024510805A (de) |
| CN (1) | CN117042822A (de) |
| DE (1) | DE102021107396A1 (de) |
| WO (1) | WO2022200414A1 (de) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100114005A1 (en) * | 2007-04-12 | 2010-05-06 | Gambro Lundia Ab | Apparatus for extracorporeal blood treatment |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4440884A1 (de) | 1994-11-17 | 1996-05-23 | Johann Seidel | Vakuumregler |
| JP4598463B2 (ja) * | 2004-09-21 | 2010-12-15 | 芝浦メカトロニクス株式会社 | 真空装置、基板貼り合わせ装置、及び基板貼り合わせ方法 |
| US8323264B2 (en) * | 2006-10-17 | 2012-12-04 | Bluesky Medical Group, Inc. | Auxiliary powered negative pressure wound therapy apparatuses and methods |
| 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 |
| JP6008098B2 (ja) * | 2012-07-12 | 2016-10-19 | 三菱自動車工業株式会社 | バキュームポンプの耐久寿命判定装置 |
| DE102013012504B4 (de) * | 2013-07-09 | 2021-05-06 | Fresenius Medical Care Deutschland Gmbh | Verfahren zur Überwachung einer extrakorporalen Blutbehandlung und Vorrichtung zur Durchführung des Verfahrens |
| DE102016203105B4 (de) | 2016-02-26 | 2024-05-08 | Bayerische Motoren Werke Aktiengesellschaft | Vorrichtung zur Diagnose eines Bremskraftunterstützungssystems in einem Kraftfahrzeug |
| DE102019101941A1 (de) * | 2019-01-25 | 2020-07-30 | Fresenius Medical Care Deutschland Gmbh | Verfahren zum Überprüfen der Fördergenauigkeit von Fördermitteln einer medizinischen Behandlungsvorrichtung, und Vorrichtungen |
-
2021
- 2021-03-24 DE DE102021107396.0A patent/DE102021107396A1/de active Pending
-
2022
- 2022-03-23 JP JP2023558557A patent/JP2024510805A/ja active Pending
- 2022-03-23 CN CN202280023879.4A patent/CN117042822A/zh active Pending
- 2022-03-23 WO PCT/EP2022/057609 patent/WO2022200414A1/de not_active Ceased
- 2022-03-23 EP EP22718107.0A patent/EP4313198A1/de active Pending
- 2022-03-23 US US18/551,443 patent/US20250032686A1/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100114005A1 (en) * | 2007-04-12 | 2010-05-06 | Gambro Lundia Ab | Apparatus for extracorporeal blood treatment |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2024510805A (ja) | 2024-03-11 |
| WO2022200414A1 (de) | 2022-09-29 |
| DE102021107396A1 (de) | 2022-09-29 |
| US20250032686A1 (en) | 2025-01-30 |
| CN117042822A (zh) | 2023-11-10 |
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