EP1794453A1 - Device for fixing a tube for peristaltic cassette - Google Patents

Device for fixing a tube for peristaltic cassette

Info

Publication number
EP1794453A1
EP1794453A1 EP05784766A EP05784766A EP1794453A1 EP 1794453 A1 EP1794453 A1 EP 1794453A1 EP 05784766 A EP05784766 A EP 05784766A EP 05784766 A EP05784766 A EP 05784766A EP 1794453 A1 EP1794453 A1 EP 1794453A1
Authority
EP
European Patent Office
Prior art keywords
tube
housing
cassette
housings
peristaltic
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
Application number
EP05784766A
Other languages
German (de)
French (fr)
Other versions
EP1794453B1 (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
Original Assignee
Debiotech SA
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 Debiotech SA filed Critical Debiotech SA
Publication of EP1794453A1 publication Critical patent/EP1794453A1/en
Application granted granted Critical
Publication of EP1794453B1 publication Critical patent/EP1794453B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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 includes 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. By opting for such a resistance, it limits considerably the traction that could exert the tube on elements of the peristaltic cassette, p. ex. clips.
  • 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).
  • Figure 1 shows an open cassette case before gluing.
  • Figure 2 illustrates the different bonding positions.
  • Figure 3 shows a profiled tube.
  • Figure 4 shows a graph for the operation of a conventional cassette with respect to flow accuracy.
  • Fig. 5 shows a graph for the operation of a conventional cassette with regard to the pressure of the cassette.
  • Figure 6 shows a graph for the operation of a glued tube cassette with respect to flow accuracy.
  • Fig. 7 shows a graph for the operation of a cassette with a sticky tube as regards the pressure of the cassette.
  • 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 two stages, closed box, 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 its attachment by clamping 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

Dispositif de fixation de tube pour cassette péristaltique Tube fastening device for peristaltic cassette
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 comprend un boîtier comportant un logement destiné à recevoir une portion de tube et des galets.A peristaltic cassette system includes 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 péristaitique: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 performances of the peristatic cassette:
• Diminution de la force de compression des galets provoquant une fuite prématurée (phénomène résultant de Ia diminution de l'épaisseur des parois du tube),• 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),
• 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).• 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. La présente invention permet de réduire considérablement, voire éliminer, les inconvénients précités.Other undesirable effects on the operation of the cassette are furthermore observed, e.g. ex. increased drive torque, premature tube wear, noise, stability. The present invention makes it possible to considerably reduce or even 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, it limits considerably the traction that could exert the tube on elements of the peristaltic cassette, p. ex. clips.
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, Ia 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 :The bonding and the use of a profiled tube are described in more detail below by means of the following figures:
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.Figure 1 shows an open cassette case before gluing. Figure 2 illustrates the different bonding positions. Figure 3 shows a profiled tube.
La figure 4 représente un graphe pour le fonctionnement d'une cassette conventionnelle en ce qui concerne la précision de débit.Figure 4 shows a graph for the operation of a conventional cassette with respect to flow accuracy.
La figure 5 représente un graphe pour le fonctionnement d'une cassette conventionnelle en ce qui concerne la pression de la cassette.Fig. 5 shows a graph for the operation of a conventional cassette with regard to the pressure of the cassette.
La figure 6 représente un graphe pour le fonctionnement d'une cassette avec tube collé en ce qui concerne la précision de débit.Figure 6 shows a graph for the operation of a glued tube cassette with respect to flow accuracy.
La figure 7 représente un graphe pour le fonctionnement d'une cassette avec tube collé en ce qui concerne la pression de la 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.Fig. 7 shows a graph for the operation of a cassette with a sticky tube as regards the pressure of the cassette. As can be seen in 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 two stages, closed box, 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).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 its attachment by clamping between the two half-casings of the cassette (see 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.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

Revendications claims
1. Boîtier de cassette péristaltique comprenant un logement de tube formant un arc de cercle, caractérisé par le fait qu'il comprend des moyens de fixation de tube disposés le long dudit logement de manière à prévenir le déplacement longitudinal d'un tube qui serait disposé dans ledit logement, lesdits moyens de fixation de tube étant adaptés pour résister à une pression supérieure à 2 bars.1. Peristaltic cassette housing comprising a tube housing forming a circular arc, characterized in that it comprises tube attachment means arranged along said housing so as to prevent the longitudinal displacement of a tube which would be arranged in said housing, said tube attachment means being adapted to withstand a pressure greater than 2 bar.
2. Boîtier selon la revendication 1 caractérisé en ce que chaque moyen de fixation comprend une cavité adaptée pour contenir une dose de colle.2. Housing according to claim 1 characterized in that each fixing means comprises a cavity adapted to contain a dose of glue.
3. Boîtier selon la revendication 2 caractérisé en ce que la cavité forme un creux.3. Housing according to claim 2 characterized in that the cavity forms a hollow.
4. Boîtier selon la revendication 2 caractérisé en ce que la cavité forme un passage reliant l'intérieur et l'extérieur du boîtier.4. Housing according to claim 2 characterized in that the cavity forms a passage connecting the inside and outside of the housing.
5. Boîtier selon la revendication 1 constitué de deux demi-boîtiers caractérisé en ce qu'une partie au moins de la zone de contact des deux demi-boîtiers se situe au niveau dudit logement, lesdits moyens de fixation étant formés par le pincement d'une partie de tube par les deux-demi boîtiers.5. Housing according to claim 1 consisting of two half-housings characterized in that at least part of the contact zone of the two half-housings is located at said housing, said fixing means being formed by the pinch of a part of the tube by the two-half housings.
6. Tube pour boîtier tel que décrit à la revendication 5 comprenant une protubérance longitudinale destinée à être pincée par les deux-demi boîtiers. 6. Housing tube as described in claim 5 comprising a longitudinal protuberance intended to be clamped by the two half-housings.
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 true EP1794453A1 (en) 2007-06-13
EP1794453B1 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)

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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
EP2758096A4 (en) 2011-09-21 2015-07-01 Bayer Medical Care Inc Continuous multi-fluid delivery 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
EP2708251B1 (en) 2012-09-17 2019-02-06 Micrel Medical Devices S.A. Infusion rotary peristaltic pump
AU2014277993A1 (en) 2013-06-14 2016-01-21 Bayer Healthcare, Llc. Portable fluid delivery system
NZ722989A (en) 2014-01-10 2018-10-26 Bayer Healthcare Llc Single-use disposable set connector
KR102528289B1 (en) 2015-01-09 2023-05-03 바이엘 헬쓰케어 엘엘씨 Multiple fluid delivery systems with multiple use disposable sets and features thereof
TWI651107B (en) 2016-06-15 2019-02-21 拜耳保健公司 Multi-use disposable system and syringe therefor
WO2019105872A1 (en) 2017-11-28 2019-06-06 Bracco Injeneering S.A. Injection system
JP7405585B2 (en) * 2019-12-04 2023-12-26 テルモ株式会社 Medical pump module and medical pump

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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
US20040073177A1 (en) * 2002-05-16 2004-04-15 Scott Laboratories, Inc. Kits 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

Non-Patent Citations (1)

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Title
See references of WO2006033076A1 *

Also Published As

Publication number Publication date
US8062009B2 (en) 2011-11-22
US20080069711A1 (en) 2008-03-20
WO2006033076A1 (en) 2006-03-30
DE602005008085D1 (en) 2008-08-21
JP4862111B2 (en) 2012-01-25
JP2008513684A (en) 2008-05-01
CN100572809C (en) 2009-12-23
EP1794453B1 (en) 2008-07-09
ATE400741T1 (en) 2008-07-15
CN101018951A (en) 2007-08-15

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