EP1835179B1 - Pompe péristaltique ayant un réglage adaptif de la vitesse variable - Google Patents

Pompe péristaltique ayant un réglage adaptif de la vitesse variable Download PDF

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Publication number
EP1835179B1
EP1835179B1 EP07103180A EP07103180A EP1835179B1 EP 1835179 B1 EP1835179 B1 EP 1835179B1 EP 07103180 A EP07103180 A EP 07103180A EP 07103180 A EP07103180 A EP 07103180A EP 1835179 B1 EP1835179 B1 EP 1835179B1
Authority
EP
European Patent Office
Prior art keywords
pump
peristaltic pump
rollers
peristaltic
profile
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.)
Active
Application number
EP07103180A
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German (de)
English (en)
Other versions
EP1835179A1 (fr
Inventor
Raphael Gordon
Kurt D. Leukanech
Michael D. Morgan
Gary P. Sorensen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcon Inc
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Alcon Inc
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Publication date
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Publication of EP1835179A1 publication Critical patent/EP1835179A1/fr
Application granted granted Critical
Publication of EP1835179B1 publication Critical patent/EP1835179B1/fr
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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
    • 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
    • F04B43/1269—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 the rotary axes of the rollers lying in a plane perpendicular to the rotary axis of the driving motor
    • 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
    • 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
    • F04B43/1238—Machines, pumps, or pumping installations having flexible working members having peristaltic action using only one roller as the squeezing element, the roller moving on an arc of a circle 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
    • 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
    • F04B49/20—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 by changing the driving speed

Definitions

  • the present invention relates generally to peristaltic pumps and more specifically to peristaltic pumps used in ophthalmic surgical equipment.
  • Peristaltic pumps work by compressing or squeezing a length of flexible tubing (sometimes between a fixed race) using a rotating roller head. As the roller head rotates, the rollers stretch and pinch off a portion of the tubing and push any fluid trapped in the tubing between the roller in the direction of rotation. Peristaltic pumps are widely used in medical applications because of their predictable flow properties.
  • peristaltic pumps Many factors influence the efficiency of peristaltic pumps, for example, pump motor torque, pump speed and pump tube flexibility. The efficiency of a peristaltic pump is also dependent on how tightly the pump rollers crush the tubing against the pump race. If the tubing is not collapsed completely by the rollers, not all of the fluid will be pushed further down the tube.
  • One characteristic of peristaltic pumps is that flow rate varies in a cyclical manner. As a roller begins to pinch off the pump tubing, flow rate is reduced to minimum and then is accelerated to a maximum as the roller continues to sweep along the pump tubing segment. The pressure moves in an inverse relationship to the flow (Pressure ⁇ as Flow ⁇ or Pressure ⁇ as Flow ⁇ ).
  • US-A-5,188,604 (Rocky Mountain Research, Inc.) describes a peristaltic pump where motor speed is responsive to pre-selected high and low fluid pressure signals representative of fluid pulsations. Accordingly, a need continues to exist for a method of reducing pulsations in a peristaltic pump that can be implemented without adding unnecessary complexity or compliance to the pumping system.
  • the present invention improves upon prior art peristaltic pumps by providing a peristaltic pump having an adaptive pulsation profile, in accordance with claims which follow. Accordingly, one objective of the present invention is to provide a high efficiency peristaltic pump. Another objective of the present invention is to provide a peristaltic pump that reduces pump pulsations. Yet another objective of the present invention is to provide a peristaltic pump having an adjustable, adaptive pulsation profile.
  • pump 10 of the present invention generally includes pump motor 12, roller head 14, containing one or more rollers 16. Pump 10 is used in combination with cassette 18 having elastomeric sheet 20 applied to the exterior of relatively rigid body or substrate 22.
  • Pump motor 12 preferably is a stepper or D.C. servo motor.
  • Roller head 14 is attached to shaft 24 of motor 12 so that motor 12 rotates roller head 14 in a plane generally normal to the axis of shaft 24, and the longitudinal axes of rollers 16 are generally radial to the axis of shaft 24.
  • Shaft 24 may contain shaft position encoder 25.
  • sheet 20 contains molded fluid channel 26 that is generally planar, arcuate in shape (within the plane) and having a radius approximating that of rollers 16 about shaft 24.
  • Sheet 20 may be made of any suitably flexible, easily molded material such as silicone rubber or thermoplastic elastomer.
  • Sheet 20 is attached or bonded to substrate 22 by any suitable technique such as adhesive, heat fusion or mechanical crimping.
  • Substrate 22 preferably is made of a material that is rigid with respect to sheet 20, such as a rigid thermoplastic, and may be made by any suitable method, such as machining or injection molding.
  • Pump 10 of the present invention may form part of console 112.
  • Console 112 generally contains pump 10 that is in fluid communication with aspiration line 120 and aspiration exhaust line 134.
  • Aspiration line 120 is connected to surgical handpiece 122 on one end and end 118 of aspiration line 120 opposite handpiece 122 is connected to pump 10 so as to draw fluid through handpiece 122.
  • Aspiration line 120 is intersected between handpiece 122 and 118 by aspiration vent line 124.
  • sensor 126 In fluid communication with aspiration line 120 is sensor 126, which may be one of a variety of invasive or non-invasive pressure or flow sensors well-known in the art.
  • Exhaust line 134 and vent line 124 drain aspirated fluid into reservoir 128 contained within or on cassette 18. Reservoir may additionally drain into drain bag 129, which may also be contained within or on cassette 18.
  • the flow/pressure of peristaltic pumps plotted against time has characteristic peaks and valleys.
  • Each peak and valley corresponds to a pump roller displacing fluid from a currently engaged pump segment.
  • the minimum point (valley) corresponds to a roller just pinching off the pump segment (thus momentarily reducing flow), the maximum (peak) corresponds to flow being accelerated to a maximum rate.
  • prior art pumps can have large flow/pressure discrepancies between the peaks and valleys, by way of example only, on the order of 10-15 mm Hg.
  • Pump 10 of the present invention has an adaptive variable speed control to accelerate rotation of rollers 16 on roller head 14 through known minimum flow (maximum pressure) points, and slow down rotation of rollers 16 on roller head 14 through known maximum flow (minimum pressure) points.
  • This acceleration/deceleration profile can be adaptive; in other words, can vary depending upon cassette 18 and/or the surgical parameters set by the user. For example, a set of pressure data versus roller 16 position can be recorded by surgical console 112 using sensor 126 and encoder 25 during initial priming or other pre-operational tests of cassette 18. This data can be can be used to derive a pump speed profile required to achieve a desired pressure/flow profile. The derived profile can be used to control the speed of pump 10 during use.
  • pressure data and position of roller 16 can be continually monitored during use, and this data can be can be used adaptively to vary the pump speed to achieve and maintain a desired pressure/flow profile during surgery.
  • console 112 can be programmed with a variety of pressure/flow profiles previously generated so as to optimize the pressure/flow profile for a particular cassette type or surgical technique. The proper pressure/flow profile can be manually selected by the user, or console 118 may automatically boot up such optimum pressure/flow profile by automatic identification of the cassette (e.g. barcode or RFID). All of these features can be implemented on commercially available surgical equipment using software commands well within a person skilled in the art.
  • sensor 126 may be used to predict minimum and maximum flow/pressure points based on the speed of motor shaft 12 so that encoder 25 is not necessary.
  • optimization of the pressure/flow profile can result in greatly attenuated peak to valley pressure variations, for example, on the order of a 3 to 1 reduction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • External Artificial Organs (AREA)

Claims (10)

  1. Pompe péristaltique (10), comportant un arbre rotatif (24) et une tête à rouleaux (14) supportant une pluralité de rouleaux (16) montée sur l'arbre, adaptée pour déplacer en utilisation un fluide le long d'un segment d'un canal de fluide souple (26), comportant une commande de vitesse variable adaptative configurée pour accélérer une rotation de la pompe à travers des points d'écoulement minimum connus, et pour décélérer une rotation de la pompe à travers des points d'écoulement maximum connus,
    dans laquelle l'accélération et la décélération de la pompe péristaltique sont basées sur un profil de pulsation de pompe prédéterminé,
    caractérisée en ce qu'une identification du profil de pulsation de pompe prédéterminé est stockée sur une cassette (18) comportant le segment d'un canal de fluide souple (26), pour une reconnaissance automatique d'une cassette utilisée avec la pompe péristaltique.
  2. Pompe péristaltique selon la revendication 1, comportant en outre des moyens (126) pour surveiller une pression de fluide et/ou un écoulement de fluide provoqué par les rouleaux (16) au cours du temps, de manière à déduire un profil de vitesse de pompe nécessaire pour obtenir un profil de pulsation de pompe souhaité, ou de manière à prévoir lesdits points d'écoulement minimum et maximum.
  3. Pompe péristaltique selon la revendication 1 ou 2, comportant en outre de moyens (25) pour surveiller la position de l'arbre (24) ou des rouleaux (26) au cours du temps.
  4. Pompe péristaltique selon la revendication 1, dans laquelle un profil de pulsation de pompe est déterminé lors d'une amorce initiale ou d'un autre test de préfonctionnement de la pompe péristaltique.
  5. Pompe péristaltique selon la revendication 1, dans laquelle un profil de pulsation de pompe est déterminé en continu pendant un fonctionnement de la pompe péristaltique.
  6. Pompe péristaltique selon la revendication 1, dans laquelle un profil de pulsation de pompe est établi par un utilisateur de la pompe péristaltique.
  7. Console chirurgicale (112), comportant :
    a. une pompe péristaltique (10), la pompe péristaltique ayant un arbre (24) et une tête à rouleaux (14) supportant une pluralité de rouleaux (16) montée sur l'arbre, adaptée pour déplacer en utilisation un fluide le long d'un segment d'un canal de fluide souple (26),
    b. un codeur de position (25) associé à la pompe pour établir l'emplacement de l'arbre (24) ou des rouleaux (16),
    c. un capteur (126) pour déterminer une pression générée dans une ligne d'aspiration (120) par la pompe péristaltique, et
    d. une commande de vitesse variable adaptative, sensible au codeur de position (25) et au capteur de pression (126) pour accélérer une rotation des rouleaux de pompe (16) à travers des points d'écoulement minimum connus, et pour décélérer une rotation des rouleaux de pompe (16) à travers des points d'écoulement maximum connus,
    dans laquelle la commande de vitesse variable adaptative est configurée pour provoquer une accélération et une décélération de la pompe péristaltique (10) sur la base d'un profil de pulsation de pompe prédéterminé,
    caractérisée en ce que le profil de pulsation de pompe est déterminé par une reconnaissance automatique, par la console chirurgicale (112), d'une cassette (18) comprenant ledit segment dudit canal du fluide souple (26), la console étant adaptée pour recevoir la cassette, et étant adaptée pour amener la pompe péristaltique à agir conjointement avec la cassette.
  8. Console chirurgicale selon la revendication 7, dans laquelle un profil de pulsation de pompe est déterminé pendant une amorce initiale ou un autre test de préfonctionnement de la pompe péristaltique.
  9. Console chirurgicale selon la revendication 7, dans laquelle un profil de pulsation de pompe est déterminé en continu pendant un fonctionnement de la pompe péristaltique.
  10. Console chirurgicale selon la revendication 7, dans laquelle un profil de pulsation de pompe est établi par un utilisateur de la console.
EP07103180A 2006-03-14 2007-02-27 Pompe péristaltique ayant un réglage adaptif de la vitesse variable Active EP1835179B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/375,453 US20070217919A1 (en) 2006-03-14 2006-03-14 Peristaltic pump

Publications (2)

Publication Number Publication Date
EP1835179A1 EP1835179A1 (fr) 2007-09-19
EP1835179B1 true EP1835179B1 (fr) 2009-03-11

Family

ID=37939933

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07103180A Active EP1835179B1 (fr) 2006-03-14 2007-02-27 Pompe péristaltique ayant un réglage adaptif de la vitesse variable

Country Status (6)

Country Link
US (1) US20070217919A1 (fr)
EP (1) EP1835179B1 (fr)
JP (1) JP2007247646A (fr)
AT (1) ATE425363T1 (fr)
DE (1) DE602007000651D1 (fr)
ES (1) ES2321886T3 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8079836B2 (en) * 2006-03-01 2011-12-20 Novartis Ag Method of operating a peristaltic pump
EP2184492B1 (fr) * 2008-11-05 2011-12-21 Roche Diagnostics GmbH Procédé destiné à la commande de pompe péristaltique
CA2758073C (fr) * 2009-05-06 2017-05-23 Alcon Research Ltd. Pompe peristaltique a multiples segments et cassette
US20110137231A1 (en) 2009-12-08 2011-06-09 Alcon Research, Ltd. Phacoemulsification Hand Piece With Integrated Aspiration Pump
NL2009424C2 (en) 2012-09-06 2014-03-10 D O R C Dutch Ophthalmic Res Ct International B V Irrigation/aspiration system, cartridge, pump unit, surgical machine, method for controlling.
CN104640523B (zh) 2012-12-11 2017-07-04 爱尔康研究有限公司 具有集成的抽吸和冲洗泵的白内障超声乳化手柄
US9962288B2 (en) 2013-03-07 2018-05-08 Novartis Ag Active acoustic streaming in hand piece for occlusion surge mitigation
US9126219B2 (en) 2013-03-15 2015-09-08 Alcon Research, Ltd. Acoustic streaming fluid ejector
US9693896B2 (en) 2013-03-15 2017-07-04 Novartis Ag Systems and methods for ocular surgery
US9915274B2 (en) 2013-03-15 2018-03-13 Novartis Ag Acoustic pumps and systems
US9750638B2 (en) 2013-03-15 2017-09-05 Novartis Ag Systems and methods for ocular surgery
US9545337B2 (en) 2013-03-15 2017-01-17 Novartis Ag Acoustic streaming glaucoma drainage device
AU2019389878A1 (en) * 2018-11-26 2021-05-20 Alcon Inc. Methods and systems for controlling aspiration flow rate

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
FR2466641A1 (fr) * 1979-09-27 1981-04-10 Boeuf Lola Le Pompe peristaltique
JPS6232969A (ja) * 1985-08-05 1987-02-12 日機装株式会社 輸液装置
DE3723178C2 (de) * 1987-07-14 1996-01-25 Bodenseewerk Perkin Elmer Co Verfahren und Vorrichtung zur Fließinjektionsanalyse in Kombination mit Atomabsorptionsspektroskopie
WO1989003230A1 (fr) * 1987-10-14 1989-04-20 The Cooper Companies, Inc. Systeme chirurgical d'irrigation et d'aspiration
US5188604A (en) * 1989-09-29 1993-02-23 Rocky Mountain Research, Inc. Extra corporeal support system
GB9607471D0 (en) * 1996-04-10 1996-06-12 Baxter Int Volumetric infusion pump
WO1998006446A2 (fr) * 1996-08-15 1998-02-19 Deka Products Limited Partnership Pompe et systeme d'irrigation medicale
US6099272A (en) * 1997-09-18 2000-08-08 Fsi International Peristaltic pump with flow control
US6962488B2 (en) * 1999-11-10 2005-11-08 Alcon, Inc. Surgical cassette having an aspiration pressure sensor
US7273359B2 (en) * 2003-11-05 2007-09-25 Linvatec Corporation Peristaltic irrigation pump system

Also Published As

Publication number Publication date
EP1835179A1 (fr) 2007-09-19
ES2321886T3 (es) 2009-06-12
ATE425363T1 (de) 2009-03-15
US20070217919A1 (en) 2007-09-20
JP2007247646A (ja) 2007-09-27
DE602007000651D1 (de) 2009-04-23

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