CN101695592A - Ultrafiltration flow rate control system for blood purification purpose - Google Patents
Ultrafiltration flow rate control system for blood purification purpose Download PDFInfo
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- CN101695592A CN101695592A CN200910191190A CN200910191190A CN101695592A CN 101695592 A CN101695592 A CN 101695592A CN 200910191190 A CN200910191190 A CN 200910191190A CN 200910191190 A CN200910191190 A CN 200910191190A CN 101695592 A CN101695592 A CN 101695592A
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- ultrafiltration
- flow rate
- control system
- plunger
- rate control
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Abstract
The invention relates to an ultrafiltration flow rate control system for blood purification purpose, which is provided with a transfusion pipe with an ultrafiltration device and is characterized in that: the ultrafiltration device is a blood purifying ceramic pump; a liquid inlet mouth and a liquid outlet mouth on the blood purifying ceramic pump are communicated with the transfusion pipe; the blood purifying ceramic pump is provided with a speed detecting device and a motor and the output end of the speed detecting device is connected with the input end of a control circuit; and the output end of the control circuit is connected with the input end of a driving circuit and the output end of the driving circuit is connected with the input end of the motor. The system has the advantages that: the ultrafiltration rate is calculated by measuring the rotating speed of a metering pump; when abnormal conditions such as a large difference between the actual ultrafiltration rate and a given ultrafiltration rate and the stopping of the rotation of the metering pump occur, the monitoring system sends an alarm message for safe monitoring; and thus, the safety of the treatment to patients is guaranteed.
Description
Technical field
The invention belongs to a kind of blood purification ultrafiltration system, a kind of specifically ultrafiltration flow rate control system for blood purification purpose.
Background technology
In blood cleaning equipment, patient's blood flows out in the body to purify through blood purification system to be got back in the body, comprises bloody path, liquid road and three parts of monitoring system in blood cleaning equipment.The bloody path system is with outside the intravital blood lead body of patient, enters blood cleaning equipment, flows back in patient's body again; Liquid-way system is to reach therapeutic purposes by solution disperse and ultrafiltration between blood and the dialysis solution; Monitoring system is to monitor by each parameter of blood cleaning equipment.
In the process of treatment, the effect that the intravital blood of patient is drawn by the road by blood pump enters in the dialyser, and draws to stay by the road from the other end and get back in the body; And the dialysis solution of normal concentration is surveyed end from dialyser by the road and is entered, by realizing disperse, convection current, Ultrafiltration between film in the dialyser and the blood and getting rid of as waste liquid from the dialyser side other end; In order to satisfy the intravital body fluid balance of patient, the pressure and the flow of ultrafiltration control system control dialysis fluid circuit turnover liquid in this process, guarantee to enter the waste liquid amount of the intravital dialysis liquid measure of patient, eliminating and set and need moisture and other compositions three balance, the i.e. displacement liquid=waste liquid+dehydrating amount got rid of in patient's body.
Existing blood purification ultrafiltration system mainly adopts two kinds of methods: a kind of is pressure controling method, by the pressure between adjusting blood circuit medium-sized vein end and the dialyser waste liquid eliminating end, thus control detection ultrafiltration flow;
Its shortcoming is: because no flow monitoring and relevant feedback link are influenced by the transparent performance of dialyzer membrane also can in the treatment, error occurs, cause malpractice.
Second kind is to adopt the effusion meter mode, detect the flow of dialysis solution in the dialyser by photoelectricity effusion meter or electromagnetic flowmeter, calculate the ultrafiltration rate, and with design ultrafiltration rate relatively, the re-adjustment dialysate pressure, realize control to the ultrafiltration rate with final control ultrafiltration volume by the control transmembrane pressure, i.e. ultrafiltration volume=dialysis fluid flow output-dialysis solution inflow amount;
Its shortcoming is: because the Resolution Error under the flow detection error, particularly low discharge causes the ultrafiltration fault, cause malpractice.
Summary of the invention
The objective of the invention is: a kind of ultrafiltration flow rate control system for blood purification purpose is provided, can accurately obtain in the blood cleaning equipment flow of liquid in the various liquid-transport pipe-lines, flow and flow speed control under controlling liquid flow and the flow velocity, particularly low discharge accurately and effectively.
For achieving the above object, invention provides a kind of ultrafiltration flow rate control system for blood purification purpose, be provided with liquid-transport pipe-line, ultrafiltration apparatus is housed on liquid-transport pipe-line, its key is: described ultrafiltration apparatus is a ceramic pump for purifying blood, liquid inlet on this ceramic pump for purifying blood and fluid mouth communicate with described liquid-transport pipe-line, and speed detector and motor are installed on the described ceramic pump for purifying blood, and wherein the outfan of this speed detector connects the input of control circuit; Control circuit is connected with drive circuit, and this drive circuit outfan connects the input winding of described motor.
Motor in the ceramic pump for purifying blood rotates, drive liquid flow, speed detector is by the detection to motor speed, obtain fluid flow and flow velocity, and feed back to control circuit, control circuit is realized the flow of liquid in the liquid-transport pipe-line and the accurate control of flow velocity by drive circuit self-regulation motor rotating speed.
Described ceramic pump for purifying blood is provided with holder, be fixed with shell on this holder with described liquid inlet and fluid mouth, in this shell plunger bushing is housed, on the plunger bushing relatively the position of liquid inlet have inlet opening and communicate with described liquid inlet, the position of relative fluid mouth has liquid outlet and communicates with described fluid mouth; Ceramic plunger is housed in plunger bushing, stretch out outside the shell outer end of this ceramic plunger, and in the installing hole on the insertion axle sleeve periphery, this axle sleeve is connected with oscillating bearing by connecting axle, described oscillating bearing is arranged in the locating hole that shaft coupling turns an end, the other end that shaft coupling turns is connected with the output shaft of motor, and has angle α between the axial line of the axial line of motor output shaft and ceramic plunger; Have interface channel between described ceramic plunger and the plunger bushing, when ceramic plunger rotates interface channel selectively with plunger bushing on inlet opening or liquid outlet be connected or disconnect.
The periphery of described ceramic plunger is made up of an arc surface and a plane, forms arc interface channel between the inwall of this plane and plunger bushing.
Angle α between the axial line of described motor output shaft and the axial line of ceramic plunger is 10～20 °.
Opposite side at shell is provided with the lubricating fluid joint, on the described plunger bushing relatively the position of lubricating fluid joint have through hole and communicate with corresponding lubricating fluid joint.
Kink has sealing shroud on ceramic plunger, and the sealing cover inserts in the groove of plunger bushing outer face, is compressed by the nut sleeve that is sleeved on the shell.
Described holder is installed on the underframe, and unsettled with respect to underframe.
Be fixed with permanent magnet on the described oscillating bearing, described speed detector is a Hall element, and this Hall element is fixed on the described holder, and the rotational trajectory of close described permanent magnet.
Described speed detector is a photoelectric sensor, and this photoelectric sensor is fixed on the described holder, and towards the rotational trajectory of described oscillating bearing.
Described control circuit is provided with direction control end, step-by-step impulse end, off line signal end and is connected with described drive circuit, the outfan group of just changeing of this drive circuit connects just transferring into winding of described motor, and the inversion output terminal group of drive circuit connects the counter-rotating input winding of described motor.
After speed detector obtains motor speed, send to control circuit, control circuit with current rotating speed with parameter be set compare, control rotating speed of motor effectively and turn to.
Described control circuit also is provided with input and is connected with extraneous with outfan.
Control circuit is connected to outside parameter setting, warning circuit by TXD and RXD holding wire, is used for being provided with obtaining setting flow parameter or sending warning message.
Flow detector also is installed on the described liquid-transport pipe-line, and the outfan of this flow detector connects the checking input of described control circuit.
Flow detector obtains the present flow rate and the flow velocity of liquid in the liquid-transport pipe-line, and compares with flow and flow velocity that speed detector obtains, and two groups of data are confirmed, with the reliable control of the flow of going bail for.
Remarkable result of the present invention is: ceramic plunger and ceramics pole plug sleeve are accurately located, and the water yield that the every rotation of ceramic plunger once sucks can accurately be controlled, and has guaranteed measuring accuracy; By measuring the rotating speed that ceramic plunger rotatablely moves, calculate the ultrafiltration rate, when actual ultrafiltration rate with to set ultrafiltration rate deviation big or when abnormal conditions such as dosing pump stall occurring, can accurately obtain in the blood cleaning equipment flow of liquid in the various liquid-transport pipe-lines, flow and flow speed control under controlling liquid flow and the flow velocity, particularly low discharge accurately and effectively.
Description of drawings
Fig. 1 is a theory diagram of the present invention;
Fig. 2 is the structural representation of ceramic pump for purifying blood;
Fig. 3 is the vertical view of Fig. 2;
Fig. 4 is the A-A cutaway view Amplified image of Fig. 3;
Fig. 5 is circuit theory diagrams of the present invention.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further details.
As shown in Figure 1, 2, 3, a kind of ultrafiltration flow rate control system for blood purification purpose, be provided with liquid-transport pipe-line 19, on liquid-transport pipe-line 19, ultrafiltration apparatus is housed, described ultrafiltration apparatus is a ceramic pump for purifying blood, liquid inlet 3a on this ceramic pump for purifying blood and fluid mouth 3b communicate with described liquid-transport pipe-line 19, and speed detector 15 and motor 18 are installed on the described ceramic pump for purifying blood, and wherein the outfan HS of this speed detector 15 connects the input of control circuit 17; Control circuit 17 is connected with drive circuit 17, and these drive circuit 17 outfans connect the input winding of described motor 18.
Shown in Fig. 2,3,4, described ceramic pump for purifying blood is provided with holder 2, be fixed with shell 3 on this holder 2 with described liquid inlet 3a and fluid mouth 3b, in this shell 3 plunger bushing 4 is housed, on the plunger bushing 4 relatively the position of liquid inlet 3a have inlet opening 4a and communicate with described liquid inlet 3a, the position of relative fluid mouth 3b has liquid outlet 4b and communicates with described fluid mouth 3b; Ceramic plunger 5 is housed in plunger bushing 4, stretch out outside the shell 3 outer end of this ceramic plunger 5, and in the installing hole on insertion axle sleeve 6 peripheries, this axle sleeve 6 is connected with oscillating bearing 8 by connecting axle 7, described oscillating bearing 8 is arranged in the locating hole that shaft coupling turns 9 one ends, shaft coupling turns 9 the other end and is connected with the output shaft of motor 18, and has angle α between the axial line of the axial line of motor 18 output shafts and ceramic plunger 5; Have interface channel 5a between described ceramic plunger 5 and the plunger bushing 4, when ceramic plunger 5 rotates interface channel 5a selectively with plunger bushing 4 on inlet opening 4a or liquid outlet 4b be connected or disconnect.
Another patent ZL200610054393.X of the concrete structure of ceramic pump for purifying blood and the visible the applicant of operation principle.
The periphery of described ceramic plunger 5 is made up of an arc surface and a plane, forms arc interface channel 5a between the inwall of this plane and plunger bushing 4.
Angle α between the axial line of described motor 18 output shafts and the axial line of ceramic plunger 5 is 10～20 °.
Opposite side at shell 3 is provided with lubricating fluid joint 10, on the described plunger bushing 4 relatively the position of lubricating fluid joint 10 have through hole 11 and communicate with corresponding lubricating fluid joint 10.
Kink has sealing shroud 12 on ceramic plunger 5, and sealing cover 12 inserts in the groove of plunger bushing 4 outer faces, is compressed by the nut sleeve 13 that is sleeved on the shell 3.
Described holder 2 is installed on the underframe 14, and unsettled with respect to underframe 14.
Be fixed with permanent magnet on the described oscillating bearing 8, described speed detector 15 is a Hall element, and this Hall element is fixed on the described holder 2, and the rotational trajectory of close described permanent magnet.
Described speed detector 15 is a photoelectric sensor, and this photoelectric sensor is fixed on the described holder 2, and towards the rotational trajectory of described oscillating bearing 8.
As shown in Figure 5, described control circuit 17 is provided with direction control end DIR, step-by-step impulse end PLUS, off line signal end EN is connected with described drive circuit 17, just change outfan group A+, the A-of this drive circuit 17 connect just transferring into winding of described motor 18, the counter-rotating input winding that the inversion output terminal group B+ of drive circuit 17, B-connect described motor 18.
Described control circuit 17 also is provided with input TXD and is connected with extraneous with outfan RXD.
As shown in Figure 1, on the described liquid-transport pipe-line 19 flow detector 22 is installed also, the outfan of this flow detector 22 connects the checking input of described control circuit 17.
Described control circuit 17 is made of single-chip microcomputer P89LPC925 and peripheral hardware reset circuit thereof and clock oscillation circuit; The P0.7 port of this single-chip microcomputer switches through the signal output part of speed detector 15, and VSS holds ground connection, and vdd terminal connects the 3.3V power supply; The P0.1 port of this single-chip microcomputer is its signal input part; The P0.2 of this single-chip microcomputer～P0.4 port is its signal output part; This single-chip microcomputer also is connected with warning circuit with the parameter setting of outside by self TXD and RXD port.
Described control circuit 17 can be according to setting rule to calculating actual ultrafiltration flow from the described signal that switches through speed detector 15, and with compare from the ultrafiltration flow preset value of described parameter setting and warning circuit and comparison result be sent to described parameter setting and warning circuit and described motor-drive circuit, described parameter setting and warning circuit according to this comparison result to the processing of reporting to the police of the stall in the liquid road, situation super, the undercurrent amount.
Claims (10)
1. ultrafiltration flow rate control system for blood purification purpose, be provided with liquid-transport pipe-line (19), on liquid-transport pipe-line (19), ultrafiltration apparatus is housed, it is characterized in that: described ultrafiltration apparatus is a ceramic pump for purifying blood, liquid inlet on this ceramic pump for purifying blood (3a) and fluid mouth (3b) communicate with described liquid-transport pipe-line (19), speed detector (15) and motor (18) are installed on the described ceramic pump for purifying blood, and wherein the outfan (HS) of this speed detector (15) connects the input of control circuit (16); Control circuit (16) is connected with drive circuit (17), and this drive circuit (17) outfan connects the input winding of described motor (18).
2. according to the described ultrafiltration flow rate control system for blood purification purpose of claim 1, it is characterized in that: described ceramic pump for purifying blood is provided with holder (2), be fixed with shell (3) on this holder (2) with described liquid inlet (3a) and fluid mouth (3b), plunger bushing (4) is housed in this shell (3), the position of the last relative liquid inlet (3a) of plunger bushing (4) has inlet opening (4a) and communicates with described liquid inlet (3a), and the position of relative fluid mouth (3b) has liquid outlet (4b) and communicates with described fluid mouth (3b); Ceramic plunger (5) is housed in plunger bushing (4), stretch out outside the shell (3) outer end of this ceramic plunger (5), and in the installing hole on insertion axle sleeve (6) periphery, this axle sleeve (6) is connected with oscillating bearing (8) by connecting axle (7), described oscillating bearing (8) is arranged in the locating hole that shaft coupling turns (9) one ends, the other end that shaft coupling turns (9) is connected with the output shaft of described motor (18), and has angle α between the axial line of the axial line of motor (18) output shaft and ceramic plunger (5); Have interface channel (5a) between described ceramic plunger (5) and the plunger bushing (4), when ceramic plunger (5) rotates interface channel (5a) selectively with plunger bushing (4) on inlet opening (4a) or liquid outlet (4b) be connected or disconnect.
3. ultrafiltration flow rate control system for blood purification purpose according to claim 2 is characterized in that: the periphery of described ceramic plunger (5) is made up of an arc surface and a plane, forms arc interface channel (5a) between the inwall of this plane and plunger bushing (4).
4. ultrafiltration flow rate control system for blood purification purpose according to claim 2, it is characterized in that: the opposite side at shell (3) is provided with lubricating fluid joint (10), and the position that described plunger bushing (4) is gone up relative lubricating fluid joint (10) has through hole (11) and communicates with corresponding lubricating fluid joint (10).
5. ultrafiltration flow rate control system for blood purification purpose according to claim 2, it is characterized in that: going up kink at ceramic plunger (5) has sealing shroud (12), sealing cover (12) inserts in the groove of plunger bushing (4) outer face, is compressed by the nut sleeve (13) that is sleeved on the shell (3).
6. according to the described ultrafiltration flow rate control system for blood purification purpose of claim 2, it is characterized in that: described oscillating bearing is fixed with permanent magnet on (8), described speed detector (15) is a Hall element, this Hall element is fixed on the described holder (2), and the rotational trajectory of close described permanent magnet.
7. according to the described ultrafiltration flow rate control system for blood purification purpose of claim 2, it is characterized in that: described speed detector (15) is a photoelectric sensor, this photoelectric sensor is fixed on the described holder (2), and towards the rotational trajectory of described oscillating bearing (8).
8. according to the described ultrafiltration flow rate control system for blood purification purpose of claim 1, it is characterized in that: described control circuit (16) is provided with direction control end (DIR), step-by-step impulse end (PLUS), off line signal end (EN) and is connected with described drive circuit (17), the just commentaries on classics outfan group (A+, A-) of this drive circuit (17) connects just transferring into winding of described motor (18), and the inversion output terminal group of drive circuit (17) (B+, B-) connects the counter-rotating input winding of described motor (18).
9. according to the described ultrafiltration flow rate control system for blood purification purpose of claim 1, it is characterized in that: described control circuit (16) also is provided with input (TXD) and is connected with extraneous with outfan (RXD).
10. according to the described ultrafiltration flow rate control system for blood purification purpose of claim 1, it is characterized in that: flow detector (22) also is installed on the described liquid-transport pipe-line (19), and the outfan of this flow detector (22) connects the checking input of described control circuit (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910191190A CN101695592A (en) | 2009-10-22 | 2009-10-22 | Ultrafiltration flow rate control system for blood purification purpose |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910191190A CN101695592A (en) | 2009-10-22 | 2009-10-22 | Ultrafiltration flow rate control system for blood purification purpose |
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| CN101695592A true CN101695592A (en) | 2010-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910191190A Pending CN101695592A (en) | 2009-10-22 | 2009-10-22 | Ultrafiltration flow rate control system for blood purification purpose |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012075782A1 (en) * | 2010-12-08 | 2012-06-14 | 重庆山外山科技有限公司 | Automatic liquid preparation system for purifying blood and its usage method |
| CN106215263A (en) * | 2016-08-31 | 2016-12-14 | 中国科学院苏州生物医学工程技术研究所 | A kind of ultrafiltration balance control device and method and continuous blood purification device |
| CN113573751A (en) * | 2018-12-28 | 2021-10-29 | 费森尤斯医疗保健控股公司 | System and method for estimating ultrafiltration rate |
-
2009
- 2009-10-22 CN CN200910191190A patent/CN101695592A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012075782A1 (en) * | 2010-12-08 | 2012-06-14 | 重庆山外山科技有限公司 | Automatic liquid preparation system for purifying blood and its usage method |
| CN106215263A (en) * | 2016-08-31 | 2016-12-14 | 中国科学院苏州生物医学工程技术研究所 | A kind of ultrafiltration balance control device and method and continuous blood purification device |
| CN113573751A (en) * | 2018-12-28 | 2021-10-29 | 费森尤斯医疗保健控股公司 | System and method for estimating ultrafiltration rate |
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Open date: 20100421 |