CN103990193A - Single-pump double-way control system and control method thereof - Google Patents
Single-pump double-way control system and control method thereof Download PDFInfo
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- CN103990193A CN103990193A CN201410209291.5A CN201410209291A CN103990193A CN 103990193 A CN103990193 A CN 103990193A CN 201410209291 A CN201410209291 A CN 201410209291A CN 103990193 A CN103990193 A CN 103990193A
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- blood
- liquid level
- flow
- kettle
- pipeline
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Classifications
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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
- A61M1/14—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
Abstract
The invention discloses a single-pump double-way control system and a control method for the single-pump double-way control system. In the dialysis process, a single-head double-way peristaltic pump keeps stable rotating speed, an artery output pipeline introduces arterial blood into a buffer pot from the body of a patient through one pipeline of the single-head double-way peristaltic pump, a vein input pipeline introduces purified blood in the buffer pot into the body of the patient through the other pipeline of the single-head double-way peristaltic pump, a flow-limiting valve changes the opening degree of a valve body to limit the blood returning amount in the ascending and descending process of the liquid level in the buffer pot, a squeezing valve is closed when the liquid level in the buffer pot ascends and is bounced off when the liquid level descends, the differential changes of liquid of two ways can be achieved by controlling opening and closing of the two blood returning pipelines, and therefore the introduced and lead-out vector direction changes of the blood are controlled, meanwhile coagulation in the pipelines is avoided, and the system is simple in structure and low in cost.
Description
Technical field
The present invention relates to hemodialysis technology field, be specifically related to single pump Double-channel control system and control method thereof for a kind of blood purification.
Background technology
Hemodialysis is renal failure one of alternative medicine safely and effectively, has been widely used at present clinical.In today of multi-disciplinary integrated medical skill development, research and develop intelligent buffer-type hemodialysis system, be the important foundation of realization raising dialysis-effect and quality, increase hemodialysis safety, have very important and urgent demand for current hemodialysis diagnosis and treatment.Add first-level buffer kettle to realize low blood flow drain during high flux hemodialysis for buffer-type dialysis machine, draw blood constant airspeed, blood back speed determines by cushioning liquid level in kettle.For ensureing that in buffering kettle, liquid level changes within the specific limits, and draw in the situation of blood constant airspeed, blood back speed should change along with the variation of buffering kettle liquid level, thereby ensures to pump into the supply of blood volume in dialyser, realizes during high flux hemodialysis, ensures dialytic efficiency.
The difference of drawing blood, blood back speed for realizing often adopts double pump device, to control the changes in pump speed of blood back pipeline, but has following defect:
1, changes in pump speed process is determined by fluid level condition, control structure complexity, and in the time that wherein a pump breaks down, other pump still in work, will cause the danger such as blood coagulation if can not shut down in time.
2, owing to drawing blood vessel road and blood back pipeline respectively by different blood pump control, increased the cost of dialysis system, for portable hemodialysis apparatus, taken up space large, and be not easy to install and use.
Summary of the invention
The problem existing for solving above-mentioned prior art, the object of the present invention is to provide single pump Double-channel control system and control method thereof for a kind of blood purification, adopt single head two-way peristaltic pump to realize by the folding of the two-way of control blood back pipeline the smooth change that cushions liquid level in kettle in the situation that pump speed is constant.
In order to achieve the above object, the present invention adopts following technical scheme:
A kind of single pump Double-channel control system for blood purification, comprise the tremulous pulse output pipe 5 and the vein intake line 4 that connect patient and buffering kettle, single head two-way peristaltic pump 3 is set on described tremulous pulse output pipe 5 and vein intake line 4, tremulous pulse output pipe 5 and vein intake line 4 respectively with a pipeline connection of single head two-way peristaltic pump 3, single head two-way peristaltic pump 3 keeps stabilized (steady-state) speed in dialysis procedure, tremulous pulse output pipe 5 is introduced arterial blood buffering kettle by a pipeline of single head two-way peristaltic pump 3 in patient body, vein intake line 4 is introduced the blood after purifying in buffering kettle in patient body by another pipeline of single head two-way peristaltic pump 3, on described vein intake line 4, be provided be in parallel flow-limiting valve 1 and squeezing valve 2, form flow-limiting valve pipeline 6 and squeezing valve pipeline 7, described flow-limiting valve 1 is connected with the outfan of controller 10 with squeezing valve 2, be connected with the high liquid level sensor 8 that is arranged on the buffering high limit of kettle liquid level place and the low liquid level sensor 9 that is arranged on buffering kettle liquid level lower bound place with the input of described controller 10, the outfan of described controller 10 is also connected with single head two-way peristaltic pump 3.
The diameter of described tremulous pulse output pipe 5
diameter with vein intake line 4
ratio be
The control method of single pump Double-channel control system for blood purification described above, adopt single head two-way peristaltic pump 3, the folding of the two-way by controlling vein intake line realizes the smooth change that cushions liquid level in kettle in the situation that single head two-way peristaltic pump 3 pump speeds are constant, change thereby realize two-way liquid differential the direction vector variation of controlling the introducing of blood and draw, avoided the blood coagulation in pipeline simultaneously;
Concrete grammar is: when drawing blood and starting, flow-limiting valve 1 and squeezing valve 2 are all in closure state, and arterial blood enters buffering kettle by tremulous pulse output pipe 5, and the liquid level now cushioning in kettle constantly rises, and draws the direction vector of blood loop blood flow for flowing into buffering kettle; When high liquid level sensor 8 detects that liquid level rising is paramount in limited time, controller 10 sends liquid and flows out buffering kettle instruction and disconnect squeezing valve 2, and the direction vector that now draws blood loop blood flow is outflow buffering kettle; Due to the diameter of tremulous pulse output pipe 5
diameter with vein intake line 4
ratio be
when squeezing valve 2 disconnects, the blood flow flowing in vein intake line 4 is greater than the blood flow flowing out in tremulous pulse output pipe 5, blood in vein intake line 4 will be by flow-limiting valve pipeline 6 and squeezing valve pipeline 7, but the blood flow that enters Venous Blood pipe by squeezing valve pipeline 7 is determined by the caliber of squeezing valve pipeline 7; Flow-limiting valve 1 in buffering the liquid level in kettle rise and decline process in change the opening degree control blood back amount of valve body, therefore the opening degree by changing flow-limiting valve 1 to be to regulate the blood flow through flow-limiting valve pipeline 6, thereby controls the speed that in buffering kettle, liquid level declines; In the time that low liquid level sensor 9 detects that liquid level drops to lower bound, controller 10 sends liquid forward and flows into buffering kettle instruction closed squeezing valve 2, now draws the direction vector of blood loop blood flow for flowing into buffering kettle; Squeezing valve 2 is along with the rising of liquid level in buffering kettle and the state of the change closed and disconnected that declines, and the speed that the opening degree of flow-limiting valve 1 changes depending on liquid level regulates manually or automatically; When squeezing valve 2 is closed, blood in squeezing valve pipeline 7 remains static, but the blood in vein intake line 4 and flow-limiting valve pipeline 6 is flow regime, and the high lower bound scope in buffering kettle is less, the closure of squeezing valve 2 is higher with disconnection switching frequency, so the blood coagulation probability in squeezing valve pipeline 7 is less.
Compared to the prior art, the present invention possesses following advantage:
The present invention adopts single head two-way peristaltic pump 3, the folding of the two-way by controlling vein intake line realizes the smooth change that cushions liquid level in kettle in the situation that single head two-way peristaltic pump 3 pump speeds are constant, thereby realize two-way liquid differential and change the direction vector variation of controlling the introducing of blood and draw, avoided the blood coagulation in pipeline simultaneously, and simple in structure, cost is low.
Brief description of the drawings
Accompanying drawing is structural representation of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, principle of the present invention and feature are described, example, only for explaining the present invention, is not intended to limit scope of the present invention.
As shown in drawings, the present invention's one single pump Double-channel control system for blood purification, comprise the tremulous pulse output pipe 5 and the vein intake line 4 that connect patient and buffering kettle, single head two-way peristaltic pump 3 is set on described tremulous pulse output pipe 5 and vein intake line 4, tremulous pulse output pipe 5 and vein intake line 4 respectively with a pipeline connection of single head two-way peristaltic pump 3, single head two-way peristaltic pump 3 keeps stabilized (steady-state) speed in dialysis procedure, tremulous pulse output pipe 5 is introduced arterial blood buffering kettle by a pipeline of single head two-way peristaltic pump 3 in patient body, vein intake line 4 is introduced the blood after purifying in buffering kettle in patient body by another pipeline of single head two-way peristaltic pump 3, on described vein intake line 4, be provided be in parallel flow-limiting valve 1 and squeezing valve 2, form flow-limiting valve pipeline 6 and squeezing valve pipeline 7, described flow-limiting valve 1 is connected with the outfan of controller 10 with squeezing valve 2, be connected with the high liquid level sensor 8 that is arranged on the buffering high limit of kettle liquid level place and the low liquid level sensor 9 that is arranged on buffering kettle liquid level lower bound place with the input of described controller 10, the outfan of described controller 10 is also connected with single head two-way peristaltic pump 3.
The diameter of described tremulous pulse output pipe 5
diameter with vein intake line 4
ratio be
As shown in drawings, the control method of single pump Double-channel control system for blood purification described above, adopt single head two-way peristaltic pump 3, the folding of the two-way by controlling vein intake line realizes the smooth change that cushions liquid level in kettle in the situation that single head two-way peristaltic pump 3 pump speeds are constant, change thereby realize two-way liquid differential the direction vector variation of controlling the introducing of blood and draw, avoided the blood coagulation in pipeline simultaneously; Concrete grammar is: when drawing blood and starting, flow-limiting valve 1 and squeezing valve 2 are all in closure state, and arterial blood enters buffering kettle by tremulous pulse output pipe 5, and the liquid level now cushioning in kettle constantly rises, and draws the direction vector of blood loop blood flow for flowing into buffering kettle; When high liquid level sensor 8 detects that liquid level rising is paramount in limited time, controller 10 sends liquid and flows out buffering kettle instruction and disconnect squeezing valve 2, and the direction vector that now draws blood loop blood flow is outflow buffering kettle; Due to the diameter of tremulous pulse output pipe 5
diameter with vein intake line 4
ratio be
when squeezing valve 2 disconnects, the blood flow flowing in vein intake line 4 is greater than the blood flow flowing out in tremulous pulse output pipe 5, blood in vein intake line 4 will be by flow-limiting valve pipeline 6 and squeezing valve pipeline 7, but the blood flow that enters Venous Blood pipe by squeezing valve pipeline 7 is determined by the caliber of squeezing valve pipeline 7; Flow-limiting valve 1 in buffering the liquid level in kettle rise and decline process in change the opening degree control blood back amount of valve body, therefore the opening degree by changing flow-limiting valve 1 to be to regulate the blood flow through flow-limiting valve pipeline 6, thereby controls the speed that in buffering kettle, liquid level declines; In the time that low liquid level sensor 9 detects that liquid level drops to lower bound, controller 10 sends liquid forward and flows into buffering kettle instruction closed squeezing valve 2, now draws the direction vector of blood loop blood flow for flowing into buffering kettle; Squeezing valve 2 is along with the rising of liquid level in buffering kettle and the state of the change closed and disconnected that declines, and the speed that the opening degree of flow-limiting valve 1 changes depending on liquid level regulates manually or automatically; When squeezing valve 2 is closed, blood in squeezing valve pipeline 7 remains static, but the blood in vein intake line 4 and flow-limiting valve pipeline 6 is flow regime, and the high lower bound scope in buffering kettle is less, the closure of squeezing valve 2 is higher with disconnection switching frequency, so the blood coagulation probability in squeezing valve pipeline 7 is less.
Therefore, control the closure of squeezing valve 2 and the opportunity of disconnection, opening degree in conjunction with flow-limiting valve 1 regulates liquid level pace of change, and it is equivalent in vein intake line 4 and tremulous pulse output pipe 5, use respectively blood pump and changes and regulate respectively pump speed to realize the above results according to buffering kettle liquid level.
Claims (3)
1. a single pump Double-channel control system for blood purification, it is characterized in that: comprise the tremulous pulse output pipe (5) and the vein intake line (4) that connect patient and buffering kettle, on described tremulous pulse output pipe (5) and vein intake line (4), single head two-way peristaltic pump (3) is set, tremulous pulse output pipe (5) and vein intake line (4) respectively with a pipeline connection of single head two-way peristaltic pump (3), single head two-way peristaltic pump (3) keeps stabilized (steady-state) speed in dialysis procedure, tremulous pulse output pipe (5) is introduced arterial blood buffering kettle by a pipeline of single head two-way peristaltic pump (3) in patient body, vein intake line (4) is introduced the blood after purifying in buffering kettle in patient body by another pipeline of single head two-way peristaltic pump (3), on described vein intake line (4), be provided with the flow-limiting valve that is in parallel (1) and squeezing valve (2), form flow-limiting valve pipeline (6) and squeezing valve pipeline (7), described flow-limiting valve (1) is connected with the outfan of controller (10) with squeezing valve (2), be connected with the high liquid level sensor (8) that is arranged on the buffering high limit of kettle liquid level place and the low liquid level sensor (9) that is arranged on buffering kettle liquid level lower bound place with the input of described controller (10), the outfan of described controller (10) is also connected with single head two-way peristaltic pump (3).
2. single pump Double-channel control system for a kind of blood purification according to claim 1, is characterized in that: the diameter of described tremulous pulse output pipe (5)
diameter with vein intake line (4)
ratio be
3. the control method of single pump Double-channel control system for the blood purification described in claim 1 or 2, it is characterized in that: adopt single head two-way peristaltic pump (3), the folding of the two-way by controlling vein intake line realizes the smooth change that cushions liquid level in kettle in the situation that single head two-way peristaltic pump (3) pump speed is constant, change thereby realize two-way liquid differential the direction vector variation of controlling the introducing of blood and draw, avoided the blood coagulation in pipeline simultaneously;
Concrete grammar is: when drawing blood and starting, flow-limiting valve (1) and squeezing valve (2) are all in closure state, arterial blood enters buffering kettle by tremulous pulse output pipe (5), the liquid level now cushioning in kettle constantly rises, and draws the direction vector of blood loop blood flow for flowing into buffering kettle; When high liquid level sensor (8) detects that liquid level rising is paramount in limited time, controller (10) sends liquid and flows out buffering kettle instruction and disconnect squeezing valve (2), and the direction vector that now draws blood loop blood flow is outflow buffering kettle; Due to the diameter of tremulous pulse output pipe (5)
diameter with vein intake line (4)
ratio be
when squeezing valve (2) disconnects, the blood flow flowing in vein intake line (4) is greater than the blood flow flowing out in tremulous pulse output pipe (5), blood in vein intake line (4) will be by flow-limiting valve pipeline (6) and squeezing valve pipeline (7), but the blood flow that enters Venous Blood pipe by squeezing valve pipeline (7) is determined by the caliber of squeezing valve pipeline (7); Flow-limiting valve (1) in buffering the liquid level in kettle rise and decline process in change the opening degree control blood back amount of valve body, therefore the opening degree that passes through to change flow-limiting valve (1) is to regulate the blood flow through flow-limiting valve pipeline (6), thereby control cushions the speed that in kettle, liquid level declines; In the time that low liquid level sensor (9) detects that liquid level drops to lower bound, controller (10) sends liquid forward and flows into buffering kettle instruction closed squeezing valve (2), now draws the direction vector of blood loop blood flow for flowing into buffering kettle; Squeezing valve (2) is along with the rising of liquid level in buffering kettle and the state of the change closed and disconnected that declines, and the speed that the opening degree of flow-limiting valve (1) changes depending on liquid level regulates manually or automatically; When squeezing valve (2) is closed, blood in squeezing valve pipeline (7) remains static, but the blood in vein intake line (4) and flow-limiting valve pipeline (6) is flow regime, and the high lower bound scope in buffering kettle is less, the closure of squeezing valve (2) is higher with disconnection switching frequency, so the blood coagulation probability in squeezing valve pipeline (7) is less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410209291.5A CN103990193B (en) | 2014-05-15 | 2014-05-15 | A kind of blood purification single pump Double-channel control system and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410209291.5A CN103990193B (en) | 2014-05-15 | 2014-05-15 | A kind of blood purification single pump Double-channel control system and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103990193A true CN103990193A (en) | 2014-08-20 |
| CN103990193B CN103990193B (en) | 2016-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410209291.5A Expired - Fee Related CN103990193B (en) | 2014-05-15 | 2014-05-15 | A kind of blood purification single pump Double-channel control system and control method thereof |
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| CN (1) | CN103990193B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107693924A (en) * | 2017-05-17 | 2018-02-16 | 威海吉威重症医疗制品有限公司 | One kind blocks elimination type catheter |
| CN111529785A (en) * | 2020-05-20 | 2020-08-14 | 浙江大学 | Dialysis machine capable of adjusting blood flow |
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Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4275726A (en) * | 1977-12-09 | 1981-06-30 | Dr. Eduard Fresenius, Chemisch-Pharmazeutische Industrie Kg Apparatebau Kg | Apparatus for fluid balancing under sterile conditions |
| US4585007A (en) * | 1982-05-15 | 1986-04-29 | Kabushiki Kaisha Kyoto Daiichi Kagaku | Method for continuously measuring a specified ingredient in a diluted liquid |
| US4650461A (en) * | 1985-06-10 | 1987-03-17 | Woods Randall L | Extracapasular cortex irrigation and extraction |
| WO2003026723A1 (en) * | 2001-09-25 | 2003-04-03 | Newheart Bio Co., Ltd. | Cardiopulmonary life support system |
| JP2008000425A (en) * | 2006-06-23 | 2008-01-10 | Nikkiso Co Ltd | Ironing pump, and its flexible tube removing method |
| WO2008033788A2 (en) * | 2006-09-11 | 2008-03-20 | Baxter International Inc. | Medical fluid system with flexible sheeting disposable unit |
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| CN201692386U (en) * | 2010-05-07 | 2011-01-05 | 陈炳华 | Liquid level control device of blood purification artery and vein pot |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107693924A (en) * | 2017-05-17 | 2018-02-16 | 威海吉威重症医疗制品有限公司 | One kind blocks elimination type catheter |
| CN111529785A (en) * | 2020-05-20 | 2020-08-14 | 浙江大学 | Dialysis machine capable of adjusting blood flow |
| CN111529785B (en) * | 2020-05-20 | 2021-06-11 | 浙江大学 | Dialysis machine capable of adjusting blood flow |
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| Publication number | Publication date |
|---|---|
| CN103990193B (en) | 2016-02-24 |
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