EP2087237A1 - Procédé de contrôle du débit d'une pompe péristaltique et pompe péristaltique - Google Patents
Procédé de contrôle du débit d'une pompe péristaltique et pompe péristaltiqueInfo
- Publication number
- EP2087237A1 EP2087237A1 EP07821910A EP07821910A EP2087237A1 EP 2087237 A1 EP2087237 A1 EP 2087237A1 EP 07821910 A EP07821910 A EP 07821910A EP 07821910 A EP07821910 A EP 07821910A EP 2087237 A1 EP2087237 A1 EP 2087237A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- finger
- downstream
- occlusion
- counter
- upstream
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
- F04B43/082—Machines, pumps, or pumping installations having flexible working members having tubular flexible members the tubular flexible member being pressed against a wall by a number of elements, each having an alternating movement in a direction perpendicular to the axes of the tubular member and each having its own driving mechanism
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
- F04B43/1223—Machines, pumps, or pumping installations having flexible working members having peristaltic action the actuating elements, e.g. rollers, moving in a straight line during squeezing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
- F04B43/1253—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
Definitions
- the invention relates to a method for controlling the flow rate in a peristaltic pump comprising occlusion means for compressing a flexible tube by forming at least one occlusion zone cyclically moving from upstream to downstream of the pump, the means occlusion device comprising mobile compression means compressing the tube towards a counter-surface, the occluding means being actuated by control means placed on an axis of rotation.
- the invention also relates to a peristaltic pump for implementing the method.
- Such peristaltic pumps are commonly used in the medical field, especially for infusions. They have the advantage of reliably delivering to the patient a relatively constant volume of the liquid to be infused.
- roller pumps There are two main types of peristaltic pumps: roller pumps and finger pumps.
- the roller pumps generally consist of two to four rollers placed on a roller carrier driven in rotation by a motor.
- a flexible tube is placed in a groove in an arc.
- the rollers moving in rotation crush the tube in the groove causing behind them a suction zone and in front of them a discharge zone.
- the finger pumps consist of a series of fingers cyclically crushing a flexible tube against a counter surface.
- the fingers move essentially vertically in wave forming an occlusion zone that moves from upstream to downstream.
- the last finger, the most downstream, is raised when the first finger, the most upstream, is against the counter-surface.
- the most common finger pumps are linear, that is, the counter surface is flat and the fingers are parallel.
- the finger control is by a series of cams arranged one behind the other, each cooperating with a finger. These cams are placed, shifted in the manner of a helix, on a common axis rotated by a motor. It exists also curved finger pumps, seeking to combine the advantages of the roller pumps with those of the finger pumps.
- Such pumps can be found for example in documents EP 1 13 609 A1 and US 5,575,631 A.
- the counter surface is not flat but in an arc and the fingers are arranged radially inside. from the counter-surface.
- a common cam several bumps and placed in the center of the arc, which actuates the fingers.
- the object of the invention is therefore to develop peristaltic pumps according to the preamble and their control method to suppress the retrograde flow phenomenon without changing the speed of the engine.
- the occlusion means in the most downstream part of the pump remain in the occlusive position on a portion of the cycle that is larger than the occlusion means in a more upstream part. of the pump, preferably that the compression means in the most upstream part of the pump.
- the occlusion zone in the most downstream position is suppressed only when the pressure in the section of the tube directly upstream of this occlusion zone is equal to or greater than the pressure prevailing in the section of the tube located directly downstream of this occlusion. Even if it is not easy to measure the pressure in the part of the tube located in the peristaltic pump, at least it is possible to size the pump so that the pressure difference between the section of the tube located directly upstream of this occlusion zone and the section of the tube directly downstream of this occlusion is positive at the moment when the occlusion is removed. This results in a peak pressure on the pressure curve recorded downstream of the pump.
- the peristaltic pump for implementing this method is provided with corresponding means.
- a simple way to perform this downstream occlusion on a portion of the larger cycle is to bring the counter-surface closer to the axis of rotation of the control means of the compression means at its most downstream point that it it is not so at another point, preferably at its most upstream point.
- control means of the finger furthest downstream are dimensioned to maintain said finger in occlusive position on a portion of the cycle greater than the other fingers, including the finger most upstream.
- control means of the most downstream finger it is possible to size the control means of the most downstream finger to maintain said finger in occlusive position when the most upstream finger enters the occlusive position.
- the method is applied to a linear finger pump.
- the counter surface is plane and, on the other hand, the counter surface and the axis of rotation of the finger control means are closer in the downstream zone than in the upstream zone. pump. This may result in the counter surface being inclined relative to the plane perpendicular to the fingers. It is also possible that the counter-surface is perpendicular to the fingers and that the axis of rotation of the finger control means is inclined relative to the plane perpendicular to the fingers.
- the counter-surface between the most upstream finger and the most downstream finger is concave.
- the method is applied to a curvilinear finger pump.
- the downstream end of the counter-surface is closer to the axis of rotation of the finger control cam than is another point of the counter-surface, preferably than the upstream end of the counter-surface. This can easily be achieved by giving the counter-surface the shape of a spiral arc whose center coincides with the axis of rotation of the finger control cam.
- the length of the finger furthest downstream is greater than the length of the one of the other fingers, preferably the length of the finger furthest upstream.
- control means of the finger most downstream for example a cam
- the height defined as the difference between, on the one hand, the distance between the point of the counter-surface closest to the axis of rotation of the finger control means. and said axis of rotation, and secondly the distance between the point of the counter surface furthest from the axis of rotation of the finger control means and said axis, is between one tenth and one half of the inner diameter of the flexible tube for which the pump is provided, preferably the height is equal to about one-fifth of the inside diameter.
- the counter-surface be provided with means to modify its longitudinal orientation and / or be removable and replaceable.
- Figure 1 Observed flow rate curve with a linear finger pump without acceleration.
- Figure 2 Curve of the observed flow rate with a linear finger pump according to the invention, without acceleration;
- Figure 3 Side view of a first embodiment of a counter surface according to the invention
- Figure 4 Side view of a second embodiment of a counter surface according to the invention
- Figure 5 Top view in longitudinal section through a linear finger pump according to the invention
- Figure 6 Cross-sectional side view of the pump of Figure 5.
- the peristaltic pump is a traditional linear finger pump. It consists of a series of fingers (1) which, as mobile compression means, crush a tube (2) against a counter surface (3). This counter-surface is placed in the door (4) of the pump.
- cams (5) is placed on an axis (6).
- These cams (5), as control means actuating the mobile compression means, are constituted for example by cylinder sections mounted eccentrically on the axis (6) and angularly offset relative to each other so that the movement of each finger is slightly delayed compared to the previous one and slightly ahead of the next.
- FIG. 1 represents the instantaneous flow rate (ml / h) as a function of the time indicated in minutes.
- the arrow shows the retrograde flow.
- the liquid thus sucked from the section (2c) of the tube located downstream of the pump partially fills the section of the tube (2b) located in the pump, thereby decreasing the volume of liquid pumped from the section ( 2a) located upstream of the pump.
- the invention provides that the most downstream finger (1b) remains in an occlusion position on a larger portion of the cycle than the other fingers, allowing time for the occlusion forming upstream to begin moving forward.
- variable angular sectors will be chosen which may, for some in any case, overlap. For example, a sector of 27 ° for the most upstream finger (1 a) and 33 ° for the most downstream finger (1 b) may be chosen, these two sectors overlapping partially.
- the simplest method is to use a counter surface inclined relative to the axis of rotation (6) of the control cams (5) of the fingers (1).
- This is shown in the example of Figure 3.
- the axis of rotation (6) is perpendicular to the fingers (1), while the counter-surface deviates from the perpendicular to the fingers.
- the inclination shown in Figure 3 is exaggerated.
- the fingers (1) are actuated by the cams (5) while being subjected to the effect of a spring (7) tending to bring them closer to the counter-surface (3).
- the cams are designed so that the fingers can remain in the occlusion position on a portion of the cycle all the more important that they are placed downstream of the pump.
- the finger most upstream (1 a) must go lower to start acting on the tube (2) and to compress it than does the finger most downstream (1 b). Consequently, it remains in the occlusion position on a shorter cycle portion than the latter.
- the cam axis (6) rotates, it drives the cam (5b) of the finger (1b) further downstream causing it to approach the counter surface (3) until it compresses the tube (2) against the latter.
- the cam (5b) continues to rotate without driving the finger which is held in this position under the effect of the spring (7). After a certain angle of rotation of the axis (6), the cam (5b) starts to move the finger (1b) this time up against the effect of the spring (7).
- the finger upstream (1a) In order for the finger upstream (1a) to compress the tube (2), it must have traveled a greater distance than the downstream finger (1b) because of the inclination of the counter-surface. While the finger (1b) further downstream is still in the occlusion position, the most upstream finger (1a) arrives in the occlusion position. In other words, the portion of the cycle in which the most downstream finger (1b) is in the occlusion position overlaps the portion of the cycle in which the most upstream finger (1a) is in turn in the occlusion position. . The more the fingers are placed downstream of the pump, the larger the portion of the cycle in which they are in occlusion position is important and their control is close to that of the finger further downstream (1 b).
- the counter surface (3) is removable and can be replaced by another counter surface of another inclination. Another solution is to provide means for inclining more or less against the surface (3) depending on the tube (2) used.
- Another solution is to provide a concave counter-surface (3) like that shown in FIG. 4.
- the portion of the cycle in which both the upstream fingers and the downstream fingers are in position. Occlusion is greater than the portion of the cycle of centrally located fingers.
- the fingers of the pump do not have the same length. The more they are placed downstream of the pump, the longer the fingers are.
- the portion of the cycle in which the most downstream finger (1 b) will be in contact with the counter surface will be larger than the portion of the cycle of the finger most upstream (1a).
- Another solution is to tilt the axis (6) of cams so that it is closer to the counter-surface (3) downstream than upstream of the pump.
- the counter surface (3) is perpendicular to the fingers, as in the state of the art, but the axis of rotation (6) of the control means (5) of the fingers deviates from the perpendicular to the fingers. fingers.
- the most downstream finger (1b) will crush the tube (2) earlier and compress it longer, so that it will always be in the occlusion position when the upstream finger (1a) will go into the occlusion position.
- this acceleration serves to reduce the retrograde flux effect
- in the context of the invention it serves to reduce the execution time of the portion of the cycle where the flow rate is close to zero.
- Due to this cyclic acceleration it is quite possible that the downstream finger (1b) remains less long in the occlusion position than the other fingers, and in particular that the upstream finger (1a).
- a first solution consists in bringing the counter-surface of the cam into the downstream part.
- the counter-surface instead of being in an arc, the counter-surface will be in a helix, coming closer to the cam as it will be close to the downstream zone of the pump.
- the control of the fingers will be done here also by cooperating a spring and the cam.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Reciprocating Pumps (AREA)
- External Artificial Organs (AREA)
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL07821910T PL2087237T3 (pl) | 2006-11-08 | 2007-10-26 | Sposób sterowania wydajnością pompy perystaltycznej i pompa perystaltyczna |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0609754A FR2908165A1 (fr) | 2006-11-08 | 2006-11-08 | Procede de controle du debit d'une pompe peristaltique et pompe peristaltique |
| PCT/EP2007/061550 WO2008055794A1 (fr) | 2006-11-08 | 2007-10-26 | Procédé de contrôle du débit d'une pompe péristaltique et pompe péristaltique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2087237A1 true EP2087237A1 (fr) | 2009-08-12 |
| EP2087237B1 EP2087237B1 (fr) | 2010-08-11 |
Family
ID=37964025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07821910A Active EP2087237B1 (fr) | 2006-11-08 | 2007-10-26 | Procédé de contrôle du débit d'une pompe péristaltique et pompe péristaltique |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US8133035B2 (fr) |
| EP (1) | EP2087237B1 (fr) |
| JP (1) | JP5116121B2 (fr) |
| CN (1) | CN101529093B (fr) |
| AT (1) | ATE477419T1 (fr) |
| DE (1) | DE602007008459D1 (fr) |
| ES (1) | ES2348819T3 (fr) |
| FR (1) | FR2908165A1 (fr) |
| PL (1) | PL2087237T3 (fr) |
| WO (1) | WO2008055794A1 (fr) |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8002727B2 (en) * | 2003-11-07 | 2011-08-23 | Nxstage Medical, Inc. | Methods and apparatus for leak detection in blood processing systems |
| US8303275B2 (en) * | 2006-12-07 | 2012-11-06 | Seiko Epson Corporation | Micropump, tube unit, and control unit |
| JP5298699B2 (ja) | 2008-08-20 | 2013-09-25 | セイコーエプソン株式会社 | 制御ユニット、チューブユニット、マイクロポンプ |
| JP5282508B2 (ja) | 2008-09-29 | 2013-09-04 | セイコーエプソン株式会社 | 制御ユニット、チューブユニット、マイクロポンプ |
| US10286149B2 (en) * | 2008-12-05 | 2019-05-14 | Fluisense Aps | Body fluid sampling device and a method thereof |
| JP5195368B2 (ja) * | 2008-12-05 | 2013-05-08 | セイコーエプソン株式会社 | チューブユニット、制御ユニット、マイクロポンプ |
| CN102174933B (zh) * | 2011-03-11 | 2013-03-06 | 北京华科仪电力仪表研究所 | 自动输送装置 |
| WO2013057109A1 (fr) * | 2011-10-21 | 2013-04-25 | Fresenius Vial Sas | Pompe péristaltique permettant de pomper un liquide et procédé permettant d'actionner une pompe péristaltique |
| US9163623B2 (en) | 2011-12-08 | 2015-10-20 | Carefusion 303, Inc. | System and method for improved flow uniformity in a peristaltic pump mechanism |
| US10094367B2 (en) * | 2012-02-22 | 2018-10-09 | Technion Research & Development Foundation Limited | Method and system for generating mechanical waves |
| JP6019718B2 (ja) * | 2012-05-02 | 2016-11-02 | セイコーエプソン株式会社 | 液体輸送装置、及び、液体輸送方法 |
| JP2016521627A (ja) | 2013-06-14 | 2016-07-25 | バイエル メディカル ケア インコーポレーテッド | 携帯型流体送出システム |
| US10549084B2 (en) | 2014-01-10 | 2020-02-04 | Bayer Healthcare Llc | Single-use disposable set connector |
| ES3030489T3 (en) | 2015-01-09 | 2025-06-30 | Bayer Healthcare Llc | Multiple fluid delivery system with multi-use disposable set and features thereof |
| DK3471797T3 (da) | 2016-06-15 | 2021-06-14 | Bayer Healthcare Llc | Engangssystem til flere formål og tilknyttet sprøjte |
| US11162486B2 (en) | 2017-11-28 | 2021-11-02 | Ivenix, Inc. | Fluid pump providing balanced input/output flow rate |
| CA3144706A1 (fr) | 2019-07-25 | 2021-01-28 | Altop Patents Iii B.V. | Procede et systeme de pompage a fonctionnement cyclique |
| CN110630479B (zh) * | 2019-09-28 | 2021-04-02 | 深圳市乐创享科技有限公司 | 蠕动泵的滑靴副挤压装置及蠕动泵 |
| US11446431B2 (en) * | 2019-11-14 | 2022-09-20 | Zevex, Inc. | Infusion pump apparatus having convex platen surface |
| CN112807519B (zh) * | 2019-11-15 | 2026-01-16 | 深圳迈瑞科技有限公司 | 输液泵 |
| CN114790977A (zh) * | 2020-07-22 | 2022-07-26 | 居承 | 一种使用软质喉管的胶体态介质输送装置 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| HU190171B (en) | 1983-10-10 | 1986-08-28 | Labor Mueszeripari Muevek,Hu | Peristaltic pump |
| DE4035182C1 (fr) * | 1990-11-06 | 1992-01-02 | B. Braun Melsungen Ag, 3508 Melsungen, De | |
| DE29724578U1 (de) * | 1997-04-18 | 2002-03-28 | Société des Produits Nestlé S.A., Vevey | Peristaltische Pumpe |
| IL120697A (en) * | 1997-04-18 | 2003-03-12 | Nestle Sa | Peristaltic pump |
| US6666665B1 (en) * | 1999-03-04 | 2003-12-23 | Baxter International Inc. | Fluid delivery mechanism having a plurality of plungers for compressing a metering chamber |
| CN201068852Y (zh) * | 2007-06-08 | 2008-06-04 | 诚展实业有限公司 | 蠕动泵 |
-
2006
- 2006-11-08 FR FR0609754A patent/FR2908165A1/fr not_active Withdrawn
-
2007
- 2007-10-26 PL PL07821910T patent/PL2087237T3/pl unknown
- 2007-10-26 DE DE602007008459T patent/DE602007008459D1/de active Active
- 2007-10-26 AT AT07821910T patent/ATE477419T1/de not_active IP Right Cessation
- 2007-10-26 US US12/513,773 patent/US8133035B2/en active Active
- 2007-10-26 EP EP07821910A patent/EP2087237B1/fr active Active
- 2007-10-26 WO PCT/EP2007/061550 patent/WO2008055794A1/fr not_active Ceased
- 2007-10-26 JP JP2009535061A patent/JP5116121B2/ja not_active Expired - Fee Related
- 2007-10-26 CN CN2007800393598A patent/CN101529093B/zh not_active Expired - Fee Related
- 2007-10-26 ES ES07821910T patent/ES2348819T3/es active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008055794A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2087237B1 (fr) | 2010-08-11 |
| US8133035B2 (en) | 2012-03-13 |
| ATE477419T1 (de) | 2010-08-15 |
| CN101529093A (zh) | 2009-09-09 |
| WO2008055794A1 (fr) | 2008-05-15 |
| ES2348819T3 (es) | 2010-12-15 |
| FR2908165A1 (fr) | 2008-05-09 |
| US20100021315A1 (en) | 2010-01-28 |
| DE602007008459D1 (de) | 2010-09-23 |
| JP2010509525A (ja) | 2010-03-25 |
| CN101529093B (zh) | 2013-03-06 |
| PL2087237T3 (pl) | 2011-05-31 |
| JP5116121B2 (ja) | 2013-01-09 |
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