EP1794453B1 - Device for fixing a tube for peristaltic cassette - Google Patents

Device for fixing a tube for peristaltic cassette Download PDF

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Publication number
EP1794453B1
EP1794453B1 EP05784766A EP05784766A EP1794453B1 EP 1794453 B1 EP1794453 B1 EP 1794453B1 EP 05784766 A EP05784766 A EP 05784766A EP 05784766 A EP05784766 A EP 05784766A EP 1794453 B1 EP1794453 B1 EP 1794453B1
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EP
European Patent Office
Prior art keywords
tube
cassette
housing
case
fixing means
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
EP05784766A
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German (de)
French (fr)
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EP1794453A1 (en
Inventor
Reto Cueni
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.)
Debiotech SA
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Debiotech SA
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Publication date
Application filed by Debiotech SA filed Critical Debiotech SA
Publication of EP1794453A1 publication Critical patent/EP1794453A1/en
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Publication of EP1794453B1 publication Critical patent/EP1794453B1/en
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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
    • F04B43/0009—Special features
    • F04B43/0054—Special features particularities of the flexible members
    • F04B43/0072—Special features particularities of the flexible members of tubular flexible members

Definitions

  • the present invention is in the field of medical peristaltic systems.
  • a peristaltic cassette system known for example from the document WO 03 / 097156A1 comprises a housing having a housing for receiving a tube portion and rollers.
  • a peristaltic cassette requires a compressive force of the tube by the rollers sufficient to ensure the tightness of the volume of liquid between two rollers. This force, associated with the rotation of the rollers driven by the motor shaft, can cause longitudinal sliding of the tube in the housing housing.
  • the housing comprises tube attachment means arranged along the tube housing so as to prevent the longitudinal displacement of a tube which would be disposed in said housing.
  • the invention is also characterized in that the tube attachment means are adapted to withstand a pressure greater than 2 bar.
  • peristaltic tube Various means for fixing the peristaltic tube can be envisaged.
  • bonding the use of an injected profiled tube, welding, vulcanization or melting of material (for example by ultrasound).
  • the casing of the cassette has 5 cavities along the raceway defining 5 bonding areas of the tube on the housing. 5 corresponding openings allow the introduction of the glue.
  • Bonding is carried out in 2 stages, closed housing, with the rollers and the motor shaft guaranteeing the position of the tube and its adhesion to the raceway (see figure 2 ). This bonding also ensures the closure of the two half-casings of the cassette.
  • Fixing the tube on the casing of the cassette can also be achieved by providing the tube with a profile having a longitudinal section, cut or not; allowing it to be clamped between the two half-casings of the cassette (see figure 3 ).
  • the invention was tested on a cassette by gluing the tube. A first series of preliminary tests showed a noticeable improvement in performance as shown by the flow and output pressure curves shown on graphs 1 to 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • External Artificial Organs (AREA)

Abstract

The invention concerns a peristaltic cassette casing comprising a tube housing forming an arc, characterized in that it comprises tube fixing means arranged along said housing so as to prevent the longitudinal displacement of a tube arranged in said housing.

Description

Domaine de l'inventionField of the invention

La présente invention se situe dans le domaine des systèmes péristaltiques médicaux.The present invention is in the field of medical peristaltic systems.

Elle concerne plus précisément les cassettes péristaltiques.It concerns more specifically the peristaltic cassettes.

Etat de la techniqueState of the art

Un système péristaltique à cassette connu par example du document WO 03/097156A1 comprend un boîtier comportant un logement destiné à recevoir une portion de tube et des galets.A peristaltic cassette system known for example from the document WO 03 / 097156A1 comprises a housing having a housing for receiving a tube portion and rollers.

Le fonctionnement d'une cassette péristaltique nécessite une force de compression du tube par les galets suffisante pour garantir l'étanchéité du volume de liquide entre deux galets. Cette force, associée à la rotation des galets entraînés par l'axe moteur, peut provoquer un glissement longitudinal du tube dans le logement du boîtier.The operation of a peristaltic cassette requires a compressive force of the tube by the rollers sufficient to ensure the tightness of the volume of liquid between two rollers. This force, associated with the rotation of the rollers driven by the motor shaft, can cause longitudinal sliding of the tube in the housing housing.

Ce glissement est difficile à maîtriser car il est fortement dépendant des coefficients de glissement entre galet et tube et entre tube et boîtier.This sliding is difficult to control because it is highly dependent on the sliding coefficients between roller and tube and between tube and housing.

Ce glissement longitudinal du tube dans le boîtier de la cassette provoque une élongation du tube en amont et dans la partie active de la cassette avec les conséquences suivantes sur les performances de la cassette péristaltique:

  • Diminution de la force de compression des galets provoquant une fuite prématurée (phénomène résultant de la diminution de l'épaisseur des parois du tube).
  • Réduction du débit (due à la diminution du volume de la chambre d'entrée, elle-même résultant de la diminution de la largeur de la chambre et à sa fermeture prématurée par le galet).
This longitudinal sliding of the tube in the casing of the cassette causes an elongation of the tube upstream and in the active part of the cassette with the following consequences on the performance of the peristaltic cassette:
  • Decrease of the compressive force of the rollers causing premature leakage (phenomenon resulting from the decrease of the thickness of the walls of the tube).
  • Reduction of the flow (due to the decrease of the volume of the inlet chamber, itself resulting from the reduction of the width of the chamber and its premature closure by the roller).

D'autres effets indésirables sur le fonctionnement de la cassette sont en outre observés, p.ex. augmentation du couple d'entraînement, usure prématurée du tube, bruit, stabilité.Other undesirable effects on the operation of the cassette are furthermore observed, eg increase in driving torque, premature wear of the tube, noise, stability.

La présente invention est défini par l'objet de la revendication 1 et permet de réduire considérablement, voire éliminer, les inconvénients précités.The present invention is defined by the subject of claim 1 and can significantly reduce or eliminate the aforementioned drawbacks.

Elle se caractérise par le fait que le boîtier comprend des moyens de fixation de tube disposés le long du logement de tube de manière à prévenir le déplacement longitudinal d'un tube qui serait disposé dans ledit logement. L'invention se caractérise également par le fait que les moyens de fixation de tube sont adaptés pour résister à une pression supérieure à 2 bars. En optant pour une telle résistance, on limite considérablement la traction que pourrait exercer le tube sur des éléments de la cassette péristaltique, p.ex. des clips.It is characterized in that the housing comprises tube attachment means arranged along the tube housing so as to prevent the longitudinal displacement of a tube which would be disposed in said housing. The invention is also characterized in that the tube attachment means are adapted to withstand a pressure greater than 2 bar. By opting for such a resistance, the traction that the tube might exert on elements of the peristaltic cassette, eg clips, is considerably limited.

Différents moyens de fixation du tube péristaltique peuvent être envisagés. A titre d'exemple non-limitatif, on peut citer le collage, l'utilisation d'un tube profilé injecté, le soudage, la vulcanisation ou la fusion de matière (p.ex. par ultrasons).Various means for fixing the peristaltic tube can be envisaged. By way of non-limiting example, mention may be made of bonding, the use of an injected profiled tube, welding, vulcanization or melting of material (for example by ultrasound).

Le collage et l'utilisation d'un tube profilé sont décrits de manière plus détaillée ci-après au moyen des figures suivantes :

  • La figure 1 présente un boîtier ouvert de cassette avant le collage.
  • La figure 2 illustre les différentes positions de collage.
  • La figure 3 présente un tube profilé.
  • La figure 4 représente un graphe pour le fonctionnement d'une cassette conventionnelle en ce qui concerne la précision de débit.
  • La figure 5 représente un graphe pour le fonctionnement d'une cassette conventionnelle en ce qui concerne la pression de la cassette.
  • La figure 6 représente un graphe pour le fonctionnement d'une cassette avec tube collé en ce qui concerne la précision de débit.
  • La figure 7 représente un graphe pour le fonctionnement d'une cassette avec tube collé en ce qui concerne la pression de la cassette.
The bonding and the use of a profiled tube are described in more detail below by means of the following figures:
  • The figure 1 presents an open cassette case before gluing.
  • The figure 2 illustrates the different bonding positions.
  • The figure 3 has a profiled tube.
  • The figure 4 represents a graph for the operation of a conventional cassette with respect to flow accuracy.
  • The figure 5 represents a graph for the operation of a conventional cassette with regard to the pressure of the cassette.
  • The figure 6 represents a graph for the operation of a glued tube cassette with respect to flow accuracy.
  • The figure 7 represents a graph for the operation of a cassette with a glued tube as regards the pressure of the cassette.

Comme on peut le voir sur la figure 1, le boîtier de la cassette comporte 5 alvéoles le long du chemin de roulement définissant 5 zones de collage du tube sur le boîtier. 5 ouvertures correspondantes permettent l'introduction de la colle.As can be seen on the figure 1 , the casing of the cassette has 5 cavities along the raceway defining 5 bonding areas of the tube on the housing. 5 corresponding openings allow the introduction of the glue.

Le collage s'effectue en 2 étapes, boîtier fermé, avec les galets et l'axe moteur garantissant la position du tube et son adhésion au chemin de roulement (voir figure 2).
Ce collage assure également la fermeture des deux demi-boîtiers de la cassette.Bonding is carried out in 2 stages, closed housing, with the rollers and the motor shaft guaranteeing the position of the tube and its adhesion to the raceway (see figure 2 ).
This bonding also ensures the closure of the two half-casings of the cassette.

La fixation du tube sur le boîtier de la cassette peut être également réalisée en dotant le tube d'un profil comportant une section longitudinale, découpée ou non; permettant sa fixation par serrage entre les deux demi-boîtiers de la cassette (voir figure 3).
L'invention a été testée sur une cassette par collage du tube. Une première série d'essais préliminaires ont fait apparaître une amélioration notable des performances comme le montrent les courbes de débit et de pression de sortie représentées sur les graphes 1 à 4.Fixing the tube on the casing of the cassette can also be achieved by providing the tube with a profile having a longitudinal section, cut or not; allowing it to be clamped between the two half-casings of the cassette (see figure 3 ).
The invention was tested on a cassette by gluing the tube. A first series of preliminary tests showed a noticeable improvement in performance as shown by the flow and output pressure curves shown on graphs 1 to 4.

Il va de soi que l'invention ne se limite pas aux moyens de fixation de tube précités et qu'elle englobe n'importe quel moyen de fixation permettant d'obtenir l'effet recherché.It goes without saying that the invention is not limited to the aforementioned tube attachment means and it encompasses any fastening means to obtain the desired effect.

Claims (3)

  1. Peristaltic cassette case comprising a tube housing forming an arc of a circle, and tube fixing means arranged along said housing to prevent longitudinal movement of a tube arranged in said housing, said tube fixing means being able to withstand a pressure of more than 2 bar, and each of said tube fixing means comprising a cavity capable of holding a quantity of adhesive, which case is characterized in that said cavity forms a passage connecting the interior and exterior of the housing.
  2. Case according to Claim 1, consisting of two case halves, characterized in that at least part of the area of contact of the two case halves is around said housing, said fixing means being arranged so as to also have the effect of securing together the two case halves.
  3. Case according to Claim 2, comprising a tube with a profile having a longitudinal section, which may or may not be cut, such that it can be gripped and so fixed between the two case halves of the cassette.
EP05784766A 2004-09-23 2005-09-20 Device for fixing a tube for peristaltic cassette Active EP1794453B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH15592004 2004-09-23
PCT/IB2005/053093 WO2006033076A1 (en) 2004-09-23 2005-09-20 Device for fixing a tube for peristaltic cassette

Publications (2)

Publication Number Publication Date
EP1794453A1 EP1794453A1 (en) 2007-06-13
EP1794453B1 true EP1794453B1 (en) 2008-07-09

Family

ID=34974193

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05784766A Active EP1794453B1 (en) 2004-09-23 2005-09-20 Device for fixing a tube for peristaltic cassette

Country Status (7)

Country Link
US (1) US8062009B2 (en)
EP (1) EP1794453B1 (en)
JP (1) JP4862111B2 (en)
CN (1) CN100572809C (en)
AT (1) ATE400741T1 (en)
DE (1) DE602005008085D1 (en)
WO (1) WO2006033076A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9759210B1 (en) 2010-06-08 2017-09-12 Stenner Pump Company, Inc. Peristaltic pump head and related methods
US9700672B2 (en) 2011-09-21 2017-07-11 Bayer Healthcare Llc Continuous multi-fluid pump device, drive and actuating system and method
JP5924019B2 (en) * 2012-02-14 2016-05-25 株式会社ジェイ・エム・エス Semi-solid injection device
US9468715B2 (en) 2012-09-17 2016-10-18 Micrel Medical Devices S.A. Infusion rotary peristaltic pump
US10688294B2 (en) 2013-06-14 2020-06-23 Bayer Healthcare Llc Portable fluid delivery system
CN116474198A (en) 2014-01-10 2023-07-25 拜耳医药保健有限公司 Method for automatically priming a single-use disposable set connector by a fluid injector system
KR102528289B1 (en) 2015-01-09 2023-05-03 바이엘 헬쓰케어 엘엘씨 Multiple fluid delivery systems with multiple use disposable sets and features thereof
CA3027532A1 (en) 2016-06-15 2017-12-21 Bayer Healthcare Llc Multi-use disposable system and syringe therefor
US10926026B2 (en) 2017-11-28 2021-02-23 Acist Medical Systems, Inc. Injection system
JP7405585B2 (en) 2019-12-04 2023-12-26 テルモ株式会社 Medical pump module and medical pump

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB769789A (en) 1955-06-08 1957-03-13 Neil Mackinnon Macdonald Improvements in or relating to rotary pumps or compressors
US3674383A (en) * 1969-09-05 1972-07-04 Frank Iles Pumps
ZA78674B (en) * 1978-02-09 1979-09-26 Ethor Ltd Dispensing of fluent materials
US5342181A (en) * 1992-06-15 1994-08-30 Datascope Investment Corp. Single roller blood pump and pump/oxygenator system using same
GB2349431B (en) 1999-04-29 2002-06-12 Watson Marlow Ltd Peristaltic pumps
US6494693B1 (en) * 2000-10-23 2002-12-17 Cole-Parmer Instrument Company Peristatic pump
CN101618243A (en) * 2002-05-16 2010-01-06 斯科特实验室公司 System of medical supplies for sedation and analgesia
US7074021B2 (en) * 2003-05-12 2006-07-11 Byrne Medical, Inc. Cartridge to be used with a peristaltic pump

Also Published As

Publication number Publication date
ATE400741T1 (en) 2008-07-15
JP4862111B2 (en) 2012-01-25
US20080069711A1 (en) 2008-03-20
JP2008513684A (en) 2008-05-01
CN100572809C (en) 2009-12-23
EP1794453A1 (en) 2007-06-13
CN101018951A (en) 2007-08-15
WO2006033076A1 (en) 2006-03-30
DE602005008085D1 (en) 2008-08-21
US8062009B2 (en) 2011-11-22

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