CN106215263A - A kind of ultrafiltration balance control device and method and continuous blood purification device - Google Patents
A kind of ultrafiltration balance control device and method and continuous blood purification device Download PDFInfo
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- CN106215263A CN106215263A CN201610780831.4A CN201610780831A CN106215263A CN 106215263 A CN106215263 A CN 106215263A CN 201610780831 A CN201610780831 A CN 201610780831A CN 106215263 A CN106215263 A CN 106215263A
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- 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
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- 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
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- 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
- A61M2205/3365—Rotational speed
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Abstract
The present invention relates to medical instruments field, be specifically related to a kind of ultrafiltration balance control device and method and continuous blood purification device.Wherein, ultrafiltration balance control device includes: the first motor, is used for driving displacement liquid pump；Second motor, is used for driving waste drains pump；3rd motor, is used for driving dialysis liquid pump；Communication module, is respectively connected with the first motor, the second motor and the 3rd motor；Processor, is connected with communication module, for according to the first motor, the second motor and the rotating speed of the 3rd motor or the ultrafiltration volume of Angle ambiguity continuous blood purification device turned over.The present invention passes through, rotating speed according to motor or the angle turned over realize the ultrafiltration volume to continuous blood purification device and control, the continuous blood purification device making embodiment is not limited by environment, can realize the accurate control of ultrafiltration balance under any environment, and the suitability is wide.
Description
Technical field
The present invention relates to medical instruments field, be specifically related to a kind of ultrafiltration balance control device and method and continuous blood
Purifier.
Background technology
At medical instruments field, continuous blood purification device refers to be set up the extracorporeal circulation of blood by electromechanical device,
Add the devices such as filtration, absorption, heat exchange on blood circulation path, thus simulate human organ, such as the heart, lung, liver, the part of kidney
Function, reaches the effect treated disease and sustain life.For patient's renal failure, multiple organs failure, acute poisoning, electrolyte
The clinical symptoms such as disorder, are given treatment to by a line, excessive moisture in timely purged body, correct hyperkalemia, remove noxious substance, for
The treatment of next is raced against time.The control wherein measured for ultrafiltration in patient blood (dehydration) is a very important treatment ginseng
Number, directly influences the life security of the effect for the treatment of, even patient.
At present, most apparatus for purifying blood is all realize control by positive displacement and the big ultimate principle of Weighing type two
Ultrafiltration volume processed, positive displacement is subdivided into counter balance pocket and volume fills formula, if the Dialog+ hemo system of Germany Bei Lang is exactly the flat of employing
Weighing apparatus chamber adds ultrafiltrate pump technology, and it is in a basic balance that counter balance pocket is used for realizing inputting between fresh dialysis fluid and outflow waste liquid,
Realizing, with special ultrafiltrate pump, the control that ultrafiltration (dehydration) is measured, although this mode precision is high, but structure is complicated simultaneously, needs
8 electromagnetic valve collaborative works.These devices all volume weights are excessive, are unfavorable for miniaturization device, it is impossible to be satisfied with movable type
CRRT first aid scheme.The mode directly weighed realizes controlling ultrafiltration volume and realizing dialysis solution, displacement liquid and blood and waste liquid
Between fluid balance relation, although be that precision is the highest, but owing to its requirement just can carry out essence in the environment of stable nothing is rocked
Really metering, causes this technology cannot use in frequently rocking such as environment such as ambulances.
Summary of the invention
The technical problem to be solved in the present invention is the ring that in prior art, apparatus for purifying blood requirement is rocked in stable nothing
Just can carry out accurate measurement under border, cause this technology cannot use in frequently rocking such as environment such as ambulances, thus provide one
Plant ultrafiltration balance control device and method and continuous blood purification device.
One aspect of the embodiment of the present invention, it is provided that a kind of ultrafiltration balance control device, is used for controlling continuous blood clean
The ultrafiltration volume of gasifying device, described continuous blood purification device includes: displacement liquid pump, waste drains pump and dialysis liquid pump, wherein, described super
Filter balance control device includes: the first motor, is used for driving described displacement liquid pump；Second motor, is used for driving institute
State waste drains pump；3rd motor, is used for driving described dialysis liquid pump；Communication module, with described first motor, described
Two stepping motor and described 3rd motor are respectively connected with；Processor, is connected with described communication module, for according to institute
State the first motor, described second motor and the rotating speed of described 3rd motor or the Angle ambiguity institute turned over
State the ultrafiltration volume of continuous blood purification device.
Further, described first motor, described second motor and described 3rd motor set respectively
It is equipped with: speed probe, for detecting the rotating speed of the motor of correspondence；And/or, angular transducer, for recording correspondence
The angle that motor is turned over.
Further, described first motor, described second motor and described 3rd motor are with gateway even
Connecing, described communication module is additionally operable to set up the communication between described processor and described gateway.
Further, use between described first motor, described second motor and described 3rd motor
Connected in series.
Further, described processor is single-chip microcomputer.
Further, also include: power module, with described first motor, described second motor, the described 3rd
Motor and described processor are respectively connected with.
The another aspect of the embodiment of the present invention, it is provided that a kind of continuous blood purification device, including: displacement liquid pump, waste liquid
Pump, dialysis liquid pump and dialyser, also include: described ultrafiltration balance control device, for controlling by described displacement liquid pump, described
Waste drains pump and the flow of described dialysis liquid pump.
Further, described displacement liquid pump, described waste drains pump and described dialysis liquid pump are ceramic plunger pump.
The another aspect of the embodiment of the present invention, it is provided that a kind of ultrafiltration balance control method, including: read the described first step
Enter motor, described second motor and the current rotating speed of described 3rd motor or the angle turned over；According to described
The rotating speed of the first motor or the angle calculation displacement liquid that the turned over present flow rate by described displacement liquid pump, according to institute
The rotating speed stating the second motor or the angle calculation waste liquid the turned over present flow rate by described waste drains pump, according to described
The rotating speed of the 3rd motor or the angle calculation dialysis solution that the turned over present flow rate by described dialysis liquid pump；According to institute
State displacement liquid by the present flow rate of described displacement liquid pump, described waste liquid by the present flow rate of described waste drains pump and described dialysis
Liquid calculates current ultrafiltration volume by the present flow rate of described dialysis liquid pump；Control command is generated, with respectively by described ultrafiltration volume
Control described first motor, described second motor and the rotating speed of described 3rd motor.
The embodiment of the present invention can reach following technique effect:
1, by using the first motor, the second motor and the 3rd motor to drive displacement liquid pump respectively, give up
Liquid pump and dialysis liquid pump, processor is communicated with motor by communication module, reads rotating speed or the institute of motor
The angle turned over, and realize the ultrafiltration volume to continuous blood purification device according to the rotating speed of motor or the angle that turned over
Control so that the continuous blood purification device of embodiment is not limited by environment, ultrafiltration balance can be realized under any environment
Accurate control, the suitability is wide.
2, by using speed probe and/or angular transducer, relative to using flow transducer (as ultrasonic flow rate passes
Sensor) directly the cost of scheme of the flow of detection pump lower, and without changing blood-flow circuit.
Accompanying drawing explanation
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, below will be to specifically
In embodiment or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not paying creative work
Put, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the theory diagram of a concrete example of continuous blood purification device in the embodiment of the present invention 1；
Fig. 2 is the theory diagram of a concrete example of ultrafiltration balance control device in the embodiment of the present invention 1；
Fig. 3 is the flow chart of a concrete example of ultrafiltration balance control method in the embodiment of the present invention 3.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme is clearly and completely described, it is clear that described enforcement
Example is a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under not making creative work premise, broadly falls into the scope of protection of the invention.
In describing the invention, it should be noted that term " " center ", " on ", D score, "left", "right", " vertically ",
Orientation or the position relationship of the instruction such as " level ", " interior ", " outward " they are based on orientation shown in the drawings or position relationship, merely to
Be easy to describe the present invention and simplifying describe rather than instruction or the hint device of indication or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.Additionally, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicate or hint relative importance.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " is installed ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be fixing connection, it is also possible to be to removably connect, or be integrally connected；Can
To be mechanical connection, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, it is also possible to
It is the connection of two element internals, can be wireless connections, it is also possible to be wired connection.For those of ordinary skill in the art
For, above-mentioned term concrete meaning in the present invention can be understood with concrete condition.
If additionally, the most non-structure of technical characteristic involved in invention described below difference embodiment
Become conflict just can be combined with each other.
Embodiment 1
The present embodiment provides a kind of ultrafiltration balance control device, and it is clean that this ultrafiltration balance control device is used for controlling continuous blood
The ultrafiltration volume of gasifying device, wherein, wherein, continuous blood purification device is as it is shown in figure 1, include: displacement liquid pump 1, waste drains pump 2 and thoroughly
Analysis liquid pump 3, this continuous blood purification device also includes: blood pump 4 and dialyser 5.Specific works principle is: by a blood pump 4
The blood of human body from internal extraction, is delivered into dialyser 5 by (typically peristaltic pump), displacement liquid by displacement liquid pump 1 input to
Blood circuit, dialysis solution is inputted to dialyser 5 by dialysis liquid pump 3, and the waste liquid of dialysis outlet is discharged by a waste drains pump 2.
During general therapeutic, the treatment parameter such as applicable ultrafiltration volume and ultrafiltration rate, wherein, ultrafiltration can be provided according to patient's practical situation
The relative dehydrating amount that amount filters exactly from blood of human body, the namely difference inputting total liquid measure and the total liquid measure of output of blood circuit
Value, input its value of total liquid measure of blood circuit is equal to through the displacement liquid total amount of displacement liquid pump 1 input and inputs through dialysis liquid pump 3
Dialysis solution total amount, blood circuit export total liquid measure be exactly through waste drains pump 2 output waste liquid total amount.
As in figure 2 it is shown, the ultrafiltration balance control device of the present embodiment includes: first motor the 11, second motor
21, the 3rd motor 31, communication module 6 and processor 7.
First motor 11 is used for driving displacement liquid pump 1；Second motor 21 is used for driving waste drains pump 2；3rd step
Enter motor 31 for driving dialysis liquid pump 3；Communication module 6 and the first motor the 11, second motor 21 and the 3rd stepping
Motor 31 is respectively connected with；Processor 7 is connected with communication module 6, for according to first motor the 11, second motor
21 and the 3rd motor 31 rotating speed or the ultrafiltration volume of Angle ambiguity continuous blood purification device that turned over.
In the present embodiment, use step motor drive pump (displacement liquid pump 1, waste drains pump 2 and dialysis liquid pump 3), the present embodiment
In pump include but not limited to plunger displacement pump, when pump is plunger displacement pump, be plunger rod by the continuous convert rotational motion of motor
Rotation and axial reciprocating motion, thus provide liquid circulation needed for power.In the specific implementation, motor is permissible
Use the motor of the UIM242C04P-IE/57-56 integration of UIROBOT company.
The operation principle of this ultrafiltration balance control device is: processor 7 reads first motor the 11, second stepping respectively
Motor 21 and the current rotating speed of the 3rd motor 31, be replaced into the stream of liquid in respective pump by the current rotating speed of motor
Speed, and then calculate the flow flowing through each pump, thus calculate current ultrafiltration volume, in order to judge the shape that current ultrafiltration balances
Condition.When being unsatisfactory for requiring, by calculating the rotating speed of each motor, it is respectively controlled.Inventor finds, due to stepping
The rotating speed of motor becomes positive correlation with the flow rate of liquid flowing through pump, and the rotating speed of motor is the biggest, and flow rate of liquid is the biggest.Former at this
On the basis of reason, can be added up by pre-trial or analogue simulation draws the functional relationships of flow rate of liquid and motor rotating speed
System, during carrying out ultrafiltration balance control, directly utilizes this functional relationship and is calculated ultrafiltration volume by the tachometer of motor, and
The rotating speed controlling motor realizes the regulation of ultrafiltration volume.
On the other hand, the angle turned over by motor also is able to calculate the fluid flow by pump.Specifically,
Motor circles (i.e. drive shaft rotates a circle 360 degree), and the fluid flow flowing through pump is essentially fixed value, when motor is turned
Angle less than 360 degree time, flow through the fluid flow of pump different according to the angle difference turned.Therefore, it can pre-build one
Flow through the function model between the fluid flow of pump and the angle turned in the individual angle cycle, analogue simulation or examination can be passed through
Test obtains.So, after detecting the angle that motor is turned over, the cycle that can be turned over according to motor and
Initial phase calculates, with the difference of current phase place, the fluid flow flowing through pump.Specifically, process is calculated as follows: the periodicity turned over
It is multiplied by each all corresponding fluid floies, obtains Part I flow；Initial phase and current phase is read from above-mentioned function model
The fluid flow of the difference correspondence of position；Both are added the fluid flow currently being flowed through pump.This mode is relative to using rotating speed
Carrying out calculated flow rate, its computational accuracy is higher.
According to embodiments of the present invention, by using the first motor, the second motor and the 3rd motor respectively
Driving displacement liquid pump, waste drains pump and dialysis liquid pump, processor is communicated with motor by communication module, reads stepping electricity
The rotating speed of machine or the angle turned over, and realize clean to continuous blood according to the rotating speed of motor or the angle that turned over
The ultrafiltration volume of gasifying device controls so that the continuous blood purification device of embodiment is not limited by environment, can under any environment
Enough realizing the accurate control of ultrafiltration balance, the suitability is wide.
As one preferred embodiment, the first motor, the second motor and the 3rd stepping in the present embodiment
It is respectively arranged with on motor: speed probe, for detecting the rotating speed of the motor of correspondence；And/or, angular transducer, use
In the angle that the motor that record is corresponding is turned over.
In the present embodiment, on the first motor, the second motor and the 3rd motor, it is respectively arranged with and turns
Speed sensor and/or angular transducer, e.g., the first motor arranges the first speed probe and/or the first angle sensor
Device, the second motor arranges the second speed probe and/or the second angular transducer, the 3rd motor arranges the 3rd
Speed probe and/or third angle sensor.
In the present embodiment, processor can directly be connected with speed probe and angular transducer, thus reads corresponding
The rotating speed of motor or the angle turned over, wherein, for angular transducer, be 360 owing to the drive shaft of motor turns around
Degree, therefore, also is able to obtain the rotating speed of motor by the detection of the anglec of rotation.
In the present embodiment, by using speed probe and/or angular transducer, relative to use flow transducer (as
Ultrasonic flow transducer) directly the cost of scheme of the flow of detection pump lower, and without changing blood-flow circuit.
It should be noted that in the embodiment of the present invention, the angle that motor is turned over may refer to initial phase in current phase
The difference of position, it is also possible to refer to turned over total angle.As: motor turns over 3 circles, and initial phase is 0 degree, and current phase place is 30 degree,
So angle turned over described in the above embodiment of the present invention can be 30 degree, it is also possible to refers to 1110 degree.If used
The former represents turned over angle, then when calculating fluid flow, in addition it is also necessary to read the number of turns that motor turns over.
As the optional embodiment of one, in the case of the pump of continuous blood purification device all uses obstruction pump, should
Plunger displacement pump can also possess flow measurement function.Specifically, the flow of each plunger single-stroke be can through demarcation and can
Knowing, the number of stroke flowing through the total flow of each pump just movable to plunger is directly proportional, under the calculating of processor and controlling, just
Can realize replacing that liquid pump, waste drains pump and the flow speed control of the single pump of dialysis liquid pump, and the final collaborative work of pump produce is super
Filter amount.
Further, owing to plunger displacement pump has step motor control, that is to say, each plunger single-stroke is corresponding certain
The angle that motor is turned over, therefore, by utilizing this corresponding relation can directly be calculated liquid stream by the rotating speed of motor
Amount.
As one preferred embodiment, the first motor, the second motor and the 3rd motor and gateway
Connecting, communication module is additionally operable to the communication setting up between processor and gateway.First motor, the second motor and the 3rd
Use connected in series between motor.
Communication module 6 is connected with displacement liquid pump 1, waste drains pump 2 and liquid pump 3 of dialysing by serial network and carries out digital communication,
Specifically, can be to carry out digital communication with first motor the 11, second motor 21 and the 3rd motor 31.
Specifically, the UART serial ports that processor 7 carries can be converted to the RS232 interface of standard by communication module 6, passes through
RS232 interface connects with the gateway of integrated motor, the one that displacement liquid pump 1, waste drains pump 2 and dialysis liquid pump 3 are used
Changing motor and have CAN interface, use connected in series between three motors, processor 7 is by read write command
Mode arranges the rotating speed of motor easily and reads the angle that motor is turned over.
Further, communication module 6 can use SP3232 chip, SP3232 chip to be a kind of Transistor-Transistor Logic level and RS232 electricity
The chip of flat turn, the UART serial ports carried by processor 7 is converted to the RS232 interface of standard, it is simple to integrated stepping electricity
The CAN/RS232 gateway of machine connects, and extends the distance of communication, improves the reliability of communication.
Preferably, the processor in the present embodiment is single-chip microcomputer.
In specific implementation process, processor can the MSP430F449 single-chip microcomputer of preferred TI company.Topmost feature
Being super low-power consumption, 0.1 μ A RAM keeps pattern, less than 250 μ A/MIPS, integrated various ip intelligent peripherals, supports that jtag interface is online
Detail programming, is highly suitable for intelligence instrument and battery powered portable equipment.
It is further preferred that as in figure 2 it is shown, ultrafiltration balance control device also includes: power module 8, with the first stepping electricity
Machine the 11, second motor the 21, the 3rd motor 31 (not shown) and processor 7 are respectively connected with.
Power module in the present embodiment can use 24V transformer-supplied to input, and on the single-chip microcomputer of the present embodiment, also sets
Being equipped with modulus conversion chip, the DC-5V simulation supply voltage of this modulus conversion chip (can be used CC10-by DC-DC module
2405) obtaining, the 3.3V voltage that single-chip microcomputer and modulus conversion chip are powered required is by using LDO linear voltage manostat
LM1117-3.3 obtains.
Embodiment 2
The present embodiment provides a kind of continuous blood purification device, and the basic structure of this device is as shown in Figure 1.The present embodiment
In, continuous blood purification device also includes: the ultrafiltration balance control device described in the embodiment of the present invention 1, for controlling by putting
Change liquid pump 1, waste drains pump 2 and the flow of dialysis liquid pump 3.To realize ultrafiltration balance control.
According to embodiments of the present invention, by using the ultrafiltration balance control device of the embodiment of the present invention 1, according to motor
Rotating speed or the angle that turned over realize the ultrafiltration volume to continuous blood purification device and control so that the continuous blood of embodiment
Purifier is not limited by environment, can realize the accurate control of ultrafiltration balance under any environment, and the suitability is wide.
As a kind of preferred implementation, displacement liquid pump, waste drains pump and dialysis liquid pump are ceramic plunger pump.
Displacement liquid pump, waste drains pump, dialysis liquid pump all have employed a kind of high-precision ceramic plunger pump of integrated bus formula, should
Ceramic plunger pump is assembled and by the way of Experimental Calibration by Precision Machining, and monomer whose flow accuracy reaches one thousandth.Because putting
Changing liquid pump, waste drains pump, dialysis liquid pump is all to use high technology ceramics plunger displacement pump, and the flow of each plunger single-stroke is to pass through
Demarcate and knowable, flow through the total flow of each pump number of stroke just to plunger activity and be directly proportional, in calculating and the control of processor
Under system, it is possible to realize displacement liquid pump, waste drains pump and the flow speed control of the single pump of dialysis liquid pump, and the final collaborative work of pump
The ultrafiltration volume produced.
Embodiment 3
Originally executing example and provide a kind of ultrafiltration balance control method, the method may be used for the ultrafiltration balance of the embodiment of the present invention 1
Control device, specifically, can be performed by processor 7, as it is shown on figure 3, this ultrafiltration balance control method includes:
Step S301, reads the first motor, the second motor and the current rotating speed of the 3rd motor or institute
The angle turned over.
Step S302, according to the rotating speed of the first motor or the angle calculation displacement liquid that turned over by displacement liquid pump
Present flow rate, the current stream by waste drains pump according to the rotating speed of the second motor or the angle calculation waste liquid that turned over
Amount, the present flow rate by liquid pump of dialysing according to the rotating speed of the 3rd motor or the angle calculation dialysis solution that turned over.
Step S303, according to displacement liquid by the displacement present flow rate of liquid pump, waste liquid by the present flow rate of waste drains pump and
Dialysis solution calculates current ultrafiltration volume by the present flow rate of dialysis liquid pump.
Step S304, is generated control command by ultrafiltration volume, to control the first motor, the second motor and respectively
The rotating speed of three motors.
What processor 7 read first motor the 11, second motor 21 and the 3rd motor 31 respectively works as forward
Speed, is replaced into the flow velocity of liquid in respective pump by the current rotating speed of motor, and then calculates the flow flowing through each pump, thus
Calculate current ultrafiltration volume, in order to judge the situation that current ultrafiltration balances.When being unsatisfactory for requiring, by calculating each step
Enter the rotating speed of motor, be respectively controlled.Inventor finds, owing to the rotating speed of motor just becomes with the flow rate of liquid flowing through pump
Relevant, the rotating speed of motor is the biggest, and flow rate of liquid is the biggest.On the basis of this principle, can be added up by pre-trial
Or analogue simulation draws the functional relationship of flow rate of liquid and motor rotating speed, during carrying out ultrafiltration balance control, directly
Connect and utilize this functional relationship to be calculated ultrafiltration volume by the tachometer of motor, and the rotating speed controlling motor realizes ultrafiltration volume
Regulation.
On the other hand, the angle turned over by motor also is able to calculate the fluid flow by pump.Specifically,
Motor circles (i.e. drive shaft rotates a circle 360 degree), and the fluid flow flowing through pump is essentially fixed value, when motor is turned
Angle less than 360 degree time, flow through the fluid flow of pump different according to the angle difference turned.Therefore, it can pre-build one
Flow through the function model between the fluid flow of pump and the angle turned in the individual angle cycle, analogue simulation or examination can be passed through
Test obtains.So, after detecting the angle that motor is turned over, the cycle that can be turned over according to motor and
Initial phase calculates, with the difference of current phase place, the fluid flow flowing through pump.Specifically, process is calculated as follows: the periodicity turned over
It is multiplied by each all corresponding fluid floies, obtains Part I flow；Initial phase and current phase is read from above-mentioned function model
The fluid flow of the difference correspondence of position；Both are added the fluid flow currently being flowed through pump.This mode is relative to using rotating speed
Carrying out calculated flow rate, its computational accuracy is higher.
According to embodiments of the present invention, by the rotating speed reading motor or the angle turned over, and according to stepping electricity
The rotating speed of machine or the angle turned over realize the ultrafiltration volume to continuous blood purification device and control so that the continuous blood of embodiment
Liquid purifier is not limited by environment, can realize the accurate control of ultrafiltration balance under any environment, and the suitability is wide.
Alternatively, in the present embodiment, processor can directly be connected with speed probe and angular transducer, thus reads
The rotating speed of corresponding motor or the angle turned over, wherein, for angular transducer, owing to the drive shaft of motor turns around
It is 360 degree, therefore, also is able to obtain the rotating speed of motor by the detection of the anglec of rotation.
As the optional embodiment of one, in the case of the pump of continuous blood purification device all uses obstruction pump, should
Plunger displacement pump can also possess flow measurement function.Specifically, the flow of each plunger single-stroke be can through demarcation and can
Knowing, the number of stroke flowing through the total flow of each pump just movable to plunger is directly proportional, under the calculating of processor and controlling, just
Can realize replacing that liquid pump, waste drains pump and the flow speed control of the single pump of dialysis liquid pump, and the final collaborative work of pump produce is super
Filter amount.
Further, owing to plunger displacement pump has step motor control, that is to say, each plunger single-stroke is corresponding certain
The angle that motor is turned over, therefore, by utilizing this corresponding relation can directly be calculated liquid stream by the rotating speed of motor
Amount.
Obviously, above-described embodiment is only for clearly demonstrating example, and not restriction to embodiment.Right
For those of ordinary skill in the field, can also make on the basis of the above description other multi-form change or
Variation.Here without also cannot all of embodiment be given exhaustive.And the obvious change thus extended out or
Change among still in the protection domain of the application.
Claims (9)
1. a ultrafiltration balance control device, it is characterised in that for controlling the ultrafiltration volume of continuous blood purification device, described company
Continuous apparatus for purifying blood includes: displacement liquid pump, waste drains pump and dialysis liquid pump, and wherein, described ultrafiltration balance control device includes:
First motor, is used for driving described displacement liquid pump；
Second motor, is used for driving described waste drains pump；
3rd motor, is used for driving described dialysis liquid pump；
Communication module, is respectively connected with described first motor, described second motor and described 3rd motor；
Processor, is connected with described communication module, for according to described first motor, described second motor and institute
The ultrafiltration volume of continuous blood purification device described in the rotating speed stating the 3rd motor or the Angle ambiguity turned over.
Ultrafiltration balance control device the most according to claim 1, it is characterised in that described first motor, described
It is respectively arranged with on two stepping motor and described 3rd motor:
Speed probe, for detecting the rotating speed of the motor of correspondence；And/or
Angular transducer, for recording the angle that the motor of correspondence is turned over.
Ultrafiltration balance control device the most according to claim 1 and 2, it is characterised in that described first motor, described
Second motor and described 3rd motor are connected with gateway, and described communication module is additionally operable to set up described processor and institute
State the communication between gateway.
Ultrafiltration balance control device the most according to claim 1 and 2, it is characterised in that described first motor, described
Use connected in series between second motor and described 3rd motor.
Ultrafiltration balance control device the most according to claim 1 and 2, it is characterised in that described processor is single-chip microcomputer.
Ultrafiltration balance control device the most according to claim 1 and 2, it is characterised in that also include: power module, with institute
State the first motor, described second motor, described 3rd motor and described processor to be respectively connected with.
7. a continuous blood purification device, including: displacement liquid pump, waste drains pump, dialysis liquid pump and dialyser, it is characterised in that
Also include: ultrafiltration balance control device described in any one of claim 1 to 6, for controlling by described displacement liquid pump, described useless
Liquid pump and the flow of described dialysis liquid pump.
Continuous blood purification device the most according to claim 7, it is characterised in that described displacement liquid pump, described waste drains pump
It is ceramic plunger pump with described dialysis liquid pump.
9. a ultrafiltration balance control method, it is characterised in that including:
Read the first motor, the second motor and the current rotating speed of the 3rd motor or the angle turned over；
Rotating speed according to described first motor or the angle calculation displacement liquid that the turned over current stream by displacement liquid pump
Amount, the present flow rate by waste drains pump according to the rotating speed of described second motor or the angle calculation waste liquid that turned over, root
The present flow rate by liquid pump of dialysing according to the rotating speed of described 3rd motor or the angle calculation dialysis solution that turned over；
According to described displacement liquid by the present flow rate of described displacement liquid pump, the described waste liquid present flow rate by described waste drains pump
Current ultrafiltration volume is calculated by the present flow rate of described dialysis liquid pump with described dialysis solution；
Control command is generated, to control described first motor, described second motor and institute respectively by described ultrafiltration volume
State the rotating speed of the 3rd motor.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US11419969B2 (en) | 2019-03-26 | 2022-08-23 | Nuwellis, Inc. | Neonatal and pediatric blood filtration system |
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