+

WO1999053201A1 - Stabilisateurs de debit pour pompes peristaltiques - Google Patents

Stabilisateurs de debit pour pompes peristaltiques Download PDF

Info

Publication number
WO1999053201A1
WO1999053201A1 PCT/IL1999/000204 IL9900204W WO9953201A1 WO 1999053201 A1 WO1999053201 A1 WO 1999053201A1 IL 9900204 W IL9900204 W IL 9900204W WO 9953201 A1 WO9953201 A1 WO 9953201A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
tubing
flow rate
tubing portion
pump
Prior art date
Application number
PCT/IL1999/000204
Other languages
English (en)
Inventor
Dan Bron
Original Assignee
Dan Bron
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dan Bron filed Critical Dan Bron
Priority to AU33432/99A priority Critical patent/AU3343299A/en
Publication of WO1999053201A1 publication Critical patent/WO1999053201A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/14212—Pumping with an aspiration and an expulsion action
    • A61M5/14228—Pumping with an aspiration and an expulsion action with linear peristaltic action, i.e. comprising at least three pressurising members or a helical member
    • 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
    • F04B43/1253—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 present invention relates to flow rate stabilizers for peristaltic pumps.
  • Peristaltic pumps are widely used in different fields, when a liquid is to be flowed under relatively low pressure within flexible tubing without coming into contact with the pump.
  • An unique use thereof, of wide scope, is developing in the medical field, wherein blood and infusion liquids must be flowed under sterile conditions and without being exposed to the environment.
  • a peristaltic pump operates by means of pressure and "squeezing" the flexible tubing along a limited section thereof in a cyclic manner, by means of a system of diverse pressure means. At the time when pressure is applied to a specific section of the tubing, it is emptied of its contents, which then flow downstream toward the consumer. After the pressure is released, that section of the tubing refills with the fluid which is supplied from upstream. Such refilling depends upon the elasticity of the tubing and its ability to return to its original shape, as well as to the dimensions of its cross-section, based on its own elastic force. Such tubing must be able to endure a great many hours and cycles of pressure until the medical use of the tubing is completed after 24-48 hours.
  • tubings used in infusion sets do not possess the required elasticity, nor do they have the strength to preserve their original round flow cross-section.
  • the tubings gradually become flattened, reducing their volume and thus causing a decrease of the flow during the entire infusion time.
  • SI tubing has good elastic qualities, but it is expensive to use and it has weak mechanical properties which introduce an element of danger to its use.
  • SI tubing it is inconvenient to reserve a particular infusion set for a particular use, while the majority of infusion sets in use do not include SI tubing. 2
  • the present invention is intended to provide a solution to the above-mentioned problems through the pump itself, which will eliminate the collapse of the standard PVC tubing and ensure its return to its precise cross-section during the entire life expectancy of the tubing.
  • the problem of decrease in the flow rate will be completely solved without adding expense to the daily use of the pump and without lessening its safety.
  • the present invention achieves the above objective by providing a flow rate stabilizer for a peristaltic pump having at least one pressure-applying member, comprising pressure-applying means for applying pressure to a tubing portion in addition to the pumping pressure applied thereto by the pump, said additional pressure to the tubing portion being substantially perpendicular to the direction of the action of the pumping pressure, causing said tubing portion to retain its original cross-section or to return thereto, the pressure applied by said member and the pressure applied by said pressure-applying means being applied sequentially so that at least some of the tubing portion upon which the pressure-applying member operates, is alternately subjected to both pressures during the pumping period; whereby the flow rate in said tubing is stabilized, ensuring the filling of the entire original volume of said tubing with fluid and preventing a decrease in the volume of said tubing portion during the operation of said pump.
  • Fig. 1 is a vertical cross-sectional view of a peristaltic line pump without a flow rate stabilizer
  • Fig. 2 is a horizontal cross-sectional view through the pressure member of a peristaltic pump having a flow rate stabilizer in the body of the pump
  • Fig. 3 is a horizontal cross-sectional view through the pressure member of a peristaltic pump having a flow rate stabilizer in the front cover of the pump
  • Fig. 4 is a top view of a circular peristaltic pump having flow rate stabilizers
  • Fig. 5 is a cross-sectional view of a further embodiment of a peristaltic line pump according to the present invention
  • Fig. 1 is a vertical cross-sectional view of a peristaltic line pump without a flow rate stabilizer
  • Fig. 2 is a horizontal cross-sectional view through the pressure member of a peristaltic pump having a flow rate stabilizer in the body of the pump
  • Fig. 3 is a horizontal cross-sectional
  • FIG. 6 is a cross-sectional view of a still further embodiment of a peristaltic line pump according to the present invention
  • Fig. 7 is a schematic illustration of a single pressure-applying member in accordance with the present invention.
  • a peristaltic line pump 2 having a front cover 4 and, in the space between them, an infusion tube 6.
  • Tube 6, resting on cover 4 is squeezed from its right by a row of pressure-applying members 8 which move horizontally towards the left.
  • the squeezing action is cyclic, a cycle beginning at the uppermost member and progressing downwards until reaching the lowest member.
  • Cross-section B shows the tubing during the squeezing stage, in which the liquid therein is pushed downward toward the consumer.
  • Cross-section C shows the maximum deformation of the tubing at the moment of maximal pressure and the subsequent closing of the entire flow path.
  • Cross-section D shows the tubing after it has undergone pressure and relaxation. Because of the plastic qualities of the tubing, a slight residual deformity and the beginning of an elliptical cross-section are observed, which become worse over time; simultaneously, a decrease of the pump's general infusion rate will develop.
  • Fig. 2 illustrates an example of a solution to the above-described problem provided by the present invention by introducing pressure means in addition to the members 8, which additional pressure means are built in the form of rigid tongs 10 operating in coordination and tied-in with members 8 of the peristaltic line pump 2.
  • member 8 is in a non-operative position and does not touch the tubing 6.
  • the jaws 12 of the tongs 10 grasp both sides of the section of the tubing 6 opposite pressure member 8, and apply pressure perpendicular to the direction of pressure applied by member 8.
  • the amount of pressure applied is determined and limited by the movement of arms 14 on shoulders 16,, such that the jaws 12 of the tongs, having a curved surface 18 of a radius matching that of the outer surface of an undeformed tubing, apply pressure for the purpose of precisely reestablishing the original round cross-section of the tubing before any pressure was applied.
  • the jaws 12 ensure and define the filling and infusion capacity of the section of PVC tubing and do not allow changes therein during the entire time of its use.
  • tongs 10 are coupled in pairs to the members 8, ensuring synchronization and complete coordination between the two operations, which should not be performed simultaneously.
  • member 8 will move towards the left for the purpose of applying pressure to tubing 6, the arms 14 will slide down from shoulders 16, jaws 12 will move about hinges 18 and thus the tubing 6 will be freed.
  • the corners 20 of members 8 will open the jaws 12 by pushing against the slanting surfaces 22 of the jaws 12, thus enabling the tubing to be squeezed freely.
  • arms 14 will slide up the slanting shoulders 16 and the jaws will exert pressure on opposite sides of the tubing, forcing it to return to its original configuration.
  • Tubing 6 thus will be maintained during an entire pressure cycle.
  • Fig. 3 illustrates a horizontal cross-sectional view through the pressure member 8 of a peristaltic pump 2 and a flow rate stabilizer attached thereto.
  • the set of tongs 24 is affixed onto the front cover 4.
  • jaws 26 squeeze tubing 6 by force of spring 28 applied to arms 30, to a dimension determined by abutments 32.
  • the principle of operation of this embodiment is similar to that of the embodiment of Fig. 2: the corners 22 of member 8, when moving leftwards, slide on the angled slanting planes 34 of jaws 26 and cause the opening of the jaws by compression of spring 28; afterwards, pressure is applied to the portion of tubing 6 abutting against tongs portion 36 which then assumes and rests in a straightened disposition.
  • spring 28 causes the return of jaws 26 of tongs 24 to their original position, applying pressure to both sides of the tubing and returning it to its original configuration.
  • FIG. 4 there is seen an example of a circular peristaltic pump.
  • tubing 6 is placed within a circular channel 38 provided in the space between the static body of pump 40 and revolving rotor 42.
  • several pressure means represented here as two rollers 44.
  • the sides of the rollers 44 project into the space within channel 38, and therefore rollers 44 must apply pressure to the tubing 6 at every point that they pass during rotation of the rotor 42.
  • rollers 44 are mounted on axes 46 perpendicularly disposed to the rotor 42.
  • a lock 54 In the center of the rotor is a lock 54, which is used for opening the rotor and raising it, for the purpose of entering and removing the tubing 6 into and from the pump.
  • Seen in Fig. 5 is an embodiment in which a stationary stabilizer forms part of member 8.
  • the pressure-applying face 56 presses against the portion of tubing 6 abutting against the portion 58 of cover 4.
  • the tips 60 of jaws 62 are free to pass through openings 64, allowing the periodic squeezing of tubing 6. While the structure of this embodiment is relatively simple, its disadvantage resides in the friction which is applied to tubing 6, eventually causing it to wear out. Also, each jaw 62 can support only a relatively short section of tubing, since the tubing must be supported by a surface 66 in order to facilitate its disengagement from the jaws without bending.
  • Fig. 6 there is illustrated a still further embodiment of a stabilizer, similar to the embodiment of Fig. 3 except for the manner of abutting the tubing 6.
  • tubing 6 is abutted by portion 68 of cover 4.
  • the tong arms 70 are hinged on the same axis 72.
  • the pressure applied by jaws 74 on tubing 6 is limited by the surfaces 76 of openings 64.
  • Fig. 7 there is illustrated an embodiment showing the utilization of a single pressure-applying member 78, flanked by two controllable valve gates, an input valve gate 80 and an output valve gate 82. Also seen in Fig. 7 is a portion of the jaw 84, constituting a part of the single stabilizer operable in accordance with any one of the above-described embodiments.
  • the valve gates 80, 82 alternatingly press against the tubing 6. Initially, gate 82 is in its pressed or closed state; and gate 80 is open.
  • gate 82 Upon the entry of fluid into the tubing, gate 82 opens and gate 80 closes; simultaneously, member 78 presses against tubing 6, forcing the fluid accumulated therein to be propelled toward the consumer. Since single pressure-applying member 78 extends along and presses against a much longer portion of the tubing than that of the combined length of gates 80, 82, the error, i.e., lack of stabilization, introduced by the unstabilized gates, can be ignored, Of course, the gates can also be furnished with stabilizer jaws in accordance with the other above-described embodiments.

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hematology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Biomedical Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Anesthesiology (AREA)
  • Vascular Medicine (AREA)
  • Reciprocating Pumps (AREA)

Abstract

L'invention concerne un stabilisateur de débit destiné à une pompe péristaltique et comprenant au moins un élément de pression (8), y compris un élément de pression servant à exercer une pression sur une partie de tubage (6) en complément de la pression de pompage exercée par la pompe. La pression complémentaire exercée contre la partie de tubage (6) est sensiblement perpendiculaire à la direction dans laquelle s'exerce la pression de pompage. De ce fait, la partie de tubage (6) garde sa coupe transversale d'origine, ou la retrouve. La pression exercée par l'élément de pression (8) et la pression exercée par le dispositif de pression s'appliquent de manière séquentielle. De cette manière, au moins une zone de la partie de tubage soumise à l'action de l'élément de pression (8) subit en alternance les deux pressions pendant le pompage. Cela permet de stabiliser le débit dans le tubage, d'assurer le remplissage avec un fluide de tout le volume d'origine du tubage (6) et d'empêcher une diminution du volume de la partie de tubage (6) pendant le fonctionnement de la pompe.
PCT/IL1999/000204 1998-04-16 1999-04-15 Stabilisateurs de debit pour pompes peristaltiques WO1999053201A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU33432/99A AU3343299A (en) 1998-04-16 1999-04-15 Flow rate stabilizers for peristaltic pumps

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL124116 1998-04-16
IL12411698 1998-04-16

Publications (1)

Publication Number Publication Date
WO1999053201A1 true WO1999053201A1 (fr) 1999-10-21

Family

ID=11071420

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IL1999/000204 WO1999053201A1 (fr) 1998-04-16 1999-04-15 Stabilisateurs de debit pour pompes peristaltiques

Country Status (2)

Country Link
AU (1) AU3343299A (fr)
WO (1) WO1999053201A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010120416A1 (fr) * 2009-03-11 2010-10-21 Baxter International Inc. Actionneurs de pompe a infusion, systeme et procede pour reguler la vitesse d'ecoulement d'un fluide medical
EP2251556A1 (fr) 2009-05-13 2010-11-17 Industrial Technology Research Institute Dispositif de roulement planaire hydrostatique correcteur et procédé associé
CN102091364A (zh) * 2011-01-11 2011-06-15 毛爱民 可使输液管回位的输液泵头及使用方法
JP2011220327A (ja) * 2010-04-02 2011-11-04 Xerox Corp 導管を操作し、前記導管を通じて流体を輸送するためのシステム及び方法
CN102921064A (zh) * 2012-11-15 2013-02-13 上海雷恩医疗器械有限公司 一种医用输液泵
CN103974730A (zh) * 2011-09-26 2014-08-06 尼普洛株式会社 输液泵
CN108261580A (zh) * 2011-08-02 2018-07-10 巴克斯特医疗保健股份有限公司 输液泵和使用输液泵输注流体的方法
CN109798240A (zh) * 2019-03-15 2019-05-24 重庆金山医疗器械有限公司 一种蠕动泵头
IT201800005075A1 (it) * 2018-05-04 2019-11-04 Dispositivo di pompaggio e Apparecchiatura medicale, in particolare per dialisi, che la include
IT202100015332A1 (it) 2021-06-11 2022-12-11 Corequest Sagl Dispositivo di pompaggio peristaltico e apparecchiatura medicale, in particolare per dialisi, che lo incorpora
WO2024091254A1 (fr) * 2022-10-28 2024-05-02 Carefusion 303, Inc. Mécanisme de récupération de segment de pompage

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2831437A (en) * 1956-04-04 1958-04-22 Cromwell Oliver Squeegee pumps
EP0446898A2 (fr) * 1990-03-15 1991-09-18 Abbott Laboratories Une soupape sous l'action d'un ressort à usage d'une pompe volumétrique de déplacement positif
US5660529A (en) * 1994-12-06 1997-08-26 Mcgaw, Inc. Linear peristaltic pump with reshaping fingers interdigitated with pumping elements
EP0800840A2 (fr) * 1996-03-14 1997-10-15 B. Braun Melsungen Ag Pompe de perfusion péristaltique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2831437A (en) * 1956-04-04 1958-04-22 Cromwell Oliver Squeegee pumps
EP0446898A2 (fr) * 1990-03-15 1991-09-18 Abbott Laboratories Une soupape sous l'action d'un ressort à usage d'une pompe volumétrique de déplacement positif
US5660529A (en) * 1994-12-06 1997-08-26 Mcgaw, Inc. Linear peristaltic pump with reshaping fingers interdigitated with pumping elements
EP0800840A2 (fr) * 1996-03-14 1997-10-15 B. Braun Melsungen Ag Pompe de perfusion péristaltique

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010120416A1 (fr) * 2009-03-11 2010-10-21 Baxter International Inc. Actionneurs de pompe a infusion, systeme et procede pour reguler la vitesse d'ecoulement d'un fluide medical
CN102348475A (zh) * 2009-03-11 2012-02-08 巴克斯特国际公司 具有用于对柔性管进行再成形的机构的蠕动式输液泵
EP2251556A1 (fr) 2009-05-13 2010-11-17 Industrial Technology Research Institute Dispositif de roulement planaire hydrostatique correcteur et procédé associé
JP2011220327A (ja) * 2010-04-02 2011-11-04 Xerox Corp 導管を操作し、前記導管を通じて流体を輸送するためのシステム及び方法
CN102091364A (zh) * 2011-01-11 2011-06-15 毛爱民 可使输液管回位的输液泵头及使用方法
CN108261580A (zh) * 2011-08-02 2018-07-10 巴克斯特医疗保健股份有限公司 输液泵和使用输液泵输注流体的方法
US9463275B2 (en) 2011-09-26 2016-10-11 Nipro Corporation Infusion pump
EP2762181A4 (fr) * 2011-09-26 2015-05-06 Nipro Corp Pompe pour solution de perfusion
CN103974730A (zh) * 2011-09-26 2014-08-06 尼普洛株式会社 输液泵
CN102921064A (zh) * 2012-11-15 2013-02-13 上海雷恩医疗器械有限公司 一种医用输液泵
IT201800005075A1 (it) * 2018-05-04 2019-11-04 Dispositivo di pompaggio e Apparecchiatura medicale, in particolare per dialisi, che la include
WO2019211782A1 (fr) * 2018-05-04 2019-11-07 Corequest Sagl Dispositif de pompage du type péristaltique et appareil médical associé, en particulier pour dialyse péritonéale
CN109798240A (zh) * 2019-03-15 2019-05-24 重庆金山医疗器械有限公司 一种蠕动泵头
IT202100015332A1 (it) 2021-06-11 2022-12-11 Corequest Sagl Dispositivo di pompaggio peristaltico e apparecchiatura medicale, in particolare per dialisi, che lo incorpora
WO2022258716A1 (fr) 2021-06-11 2022-12-15 Corequest Sagl Dispositif de pompage péristaltique et appareil médical, en particulier pour dialyse, l'incorporant
WO2024091254A1 (fr) * 2022-10-28 2024-05-02 Carefusion 303, Inc. Mécanisme de récupération de segment de pompage

Also Published As

Publication number Publication date
AU3343299A (en) 1999-11-01

Similar Documents

Publication Publication Date Title
US5888052A (en) Linear peristaltic pump with reshaping fingers intedigitated with pumping elements
US8137083B2 (en) Infusion pump actuators, system and method for controlling medical fluid flowrate
WO1999053201A1 (fr) Stabilisateurs de debit pour pompes peristaltiques
US6234773B1 (en) Linear peristaltic pump with reshaping fingers interdigitated with pumping elements
US7955060B2 (en) Peristaltic pump
US5165873A (en) Two-cycle peristaltic pump
AU2012297028B2 (en) Linear peristaltic pump
US5322422A (en) Volumetric pump tube reshaper and method
JP2591732B2 (ja) リニア蠕動ポンプ
US5158437A (en) Volumetric pump with spring-biased cracking valves
US5357827A (en) Torque compensated cam assembly and method
EP2621560B1 (fr) Obturateur anti-écoulement libre et tampon actionneur d'amorçage
US5078362A (en) Spring-biased valve for use in a positive displacement volumetic pump
JPH0315682A (ja) 蠕動運動ポンプ用ホース
US5219279A (en) Volumetric pump with pump plunger support and method
EP0446898A2 (fr) Une soupape sous l'action d'un ressort à usage d'une pompe volumétrique de déplacement positif
EP0422855B1 (fr) Pompe peristaltique à deux temps
CN221579139U (zh) 一种管路穿刺针头防脱落的限位装置
JP2024149419A (ja) リニア形ペリスタルティックポンプ用のデバイス、ローター及びリニア形ペリスタルティックポンプ
CN114681717A (zh) 一种输液装置
HU195869B (en) Hose pump

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW SD SL SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载