EP0668443B1 - Pompe à galets pour machines cardiopulmonaires - Google Patents

Pompe à galets pour machines cardiopulmonaires Download PDF

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Publication number
EP0668443B1
EP0668443B1 EP94102331A EP94102331A EP0668443B1 EP 0668443 B1 EP0668443 B1 EP 0668443B1 EP 94102331 A EP94102331 A EP 94102331A EP 94102331 A EP94102331 A EP 94102331A EP 0668443 B1 EP0668443 B1 EP 0668443B1
Authority
EP
European Patent Office
Prior art keywords
pump
roller
head
drive unit
housing
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.)
Expired - Lifetime
Application number
EP94102331A
Other languages
German (de)
English (en)
Other versions
EP0668443A1 (fr
Inventor
Erwin Dr-Ing Knott
Friedmann Günter
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.)
Stockert Instrumente GmbH
Original Assignee
Stockert Instrumente GmbH
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8215687&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0668443(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Stockert Instrumente GmbH filed Critical Stockert Instrumente GmbH
Priority to EP94102331A priority Critical patent/EP0668443B1/fr
Priority to DE59404780T priority patent/DE59404780D1/de
Priority to US08/387,609 priority patent/US5499907A/en
Publication of EP0668443A1 publication Critical patent/EP0668443A1/fr
Application granted granted Critical
Publication of EP0668443B1 publication Critical patent/EP0668443B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the invention relates to a roller pump, in particular for heart-lung machines, which has a pump head consisting of a pump stator and pump rotor, a drive unit and a pump housing.
  • roller pumps such as the roller pump known from EP-A-0 033 666, consist of a pump head, a drive unit and a pump housing, of which in turn the pump head consists of a pump stator and a pump rotor.
  • the pump stator is an essentially cylindrical cavity, the inner wall of which is referred to as the pump bed and serves as a bearing for a piece of tubing which is inserted into the pump head and lies against the inner wall.
  • the pump rotor which is rotatable about its central longitudinal axis, is arranged in the pump stator in such a way that rollers which are rotatably mounted on a roller carrier can be rolled off the tube piece and thereby compress the tube piece.
  • the pump stator has at least one open section for leading out the hose, through which the piece of hose is guided from the interior of the cavity of the pump stator.
  • at least one end of the tube piece must be fixed to the pump stator.
  • fixation at both ends of the hose section is required.
  • the drive unit is arranged in the pump housing, which also serves to support the pump head. In known roller pumps, electrical power supply and control devices for the pump drive are also provided in the pump housing.
  • Roller pumps are used in medical technology, especially in heart-lung machines for pumping blood in an artificial circulation. Part of this circuit is the hose inserted in the pump head. Not only because of the occlusion of the hose caused by the rollers of the roller pump, but also because of the contact with the inner wall of the hose, the delivered blood is undesirably affected and damaged.
  • the aim of every application of blood pumps, especially in heart-lung machines, must therefore be to make the period in which the blood is in contact with the inner wall of the tube as short as possible. Basically, this consideration means that the hose pieces used are kept as short as possible.
  • the heart-lung machine which usually contains several roller pumps, must be set up as a whole in such a way that the shortest possible pieces of tubing result.
  • the heart-lung machine In view of the size of a heart-lung machine, in most cases there are undesirably long hose lines, which lead to very long-lasting contact between the blood and the inner wall of the hose.
  • the invention has for its object to provide a roller pump of the type mentioned, the structure of which supports the desired shortening of the hose length.
  • the pump head can be rotatable about an axis parallel to the central longitudinal axis of the pump rotor, which means that the outlet opening of the pump stator for the inserted tube piece can be aligned in such a way that the overall tube length is as short as possible.
  • roller pump according to the invention is designed so that the pump head can be removed from the pump housing, the pump head connected to the drive unit can be inserted into a separate, generally much smaller, housing.
  • the much smaller housing which houses the drive unit and supports the pump head, can be placed near the patient or an additional device and is only connected to the heart-lung machine via electrical power supply and control lines.
  • the immediate spatial proximity to the patient or to the additional device of the heart-lung machine leads to extremely short tube lengths, which are particularly necessary if an artificial blood circulation for patients with low total blood, such as newborns and infants.
  • pump heads or double pump heads of different sizes can be used on the same base, which is not only with regard to the flexibility of the roller pump or the heart-lung machine, but also with regard to it on the cleaning options is advantageous.
  • a locking device is advantageously provided with which the pump head is fixed to the pump housing.
  • the energy source for the drive unit and / or the control unit for controlling the drive unit is also provided in the pump housing in the roller pump according to the invention.
  • electrical connections are required, which can be made as long as required in a very simple manner.
  • a roller pump which consists of a pump head 1, a drive unit 2 and a pump housing 3.
  • the pump head 1 comprises a pump stator 4, in the essentially cylindrical cavity 5 of which a pump rotor 6 is arranged so as to be rotatable about its central longitudinal axis.
  • the pump rotor 6 has rollers 8, each of which is mounted on a roller carrier 7 and which, when the pump rotor 6 rotates, run on the tube piece 9 inserted in the pump head.
  • the inner wall of the cylindrical cavity of the pump stator 4 serves as a counter bearing on which the piece of tubing abuts. This camp is commonly referred to as a pump bed.
  • the pump stator further comprises a base plate 10, which on the one hand receives the bearings 11 and 12 of the pump rotor bearing and on the other hand serves to support the pump head in the housing 3.
  • both the pump stator 4 and the base plate 10 are circular, so that the pump head in the opening of the housing 3 receiving the pump head is rotatable about an axis which is parallel to the central longitudinal axis of the pump rotor.
  • the opened section 13 of the pump stator 4, through which the tube piece is led out of the cylindrical interior of the pump stator, can accordingly be arranged in different directions when the pump head is rotated about its axis of rotation in the opening of the housing 3.
  • a hose fixing module 14 is arranged on the open section 13 of the pump stator 4, which can be detached from the pump stator and thus from the pump head of the roller pump.
  • Two fixation units 15 are provided in the hose fixation module 14 and fix the two ends of the hose section 9 led out of the pump stator 4.
  • the drive unit 2 is fastened directly to the base plate 10 of the pump stator 4.
  • the drive unit 2 is thus moved together with the pump head, i.e. twisted.
  • the compact design of the drive unit 2 enables an arrangement directly on the base plate 10 of the pump stator 4.
  • the drive unit 2 consists of a gear unit 16 and an electric motor 17.
  • the gear unit 16 has two stages 18 and 19, which means that the compact design of the gear unit 16 is achieved. Both gear stages are belt transmissions, in each of which a toothed belt is used.
  • the two-stage belt transmission provided in the exemplary embodiment achieves the required reduction in speed from the motor to the pump rotor in a compact construction and provides the necessary elasticity which is generally sought when driving roller pumps.
  • the unit of pump head and pump drive according to the invention opens up the possibility of power supply and / or outsource the control unit from the pump housing and arrange it in another housing part of the heart-lung machine.
  • the outsourcing is advantageously limited to the voltage supply of the roller pumps of a heart-lung machine. As a result, a voltage supply can be provided for all roller pumps in a heart-lung machine.
  • the control units will usually remain individually for each roller pump in the associated pump housing, as will the displays for pump-specific measured variables and operating states.
  • FIG. 2 shows a locking device 21 with which the pump head can be locked on the pump housing 3. A selected rotational position is secured with the help of the locking device 21.
  • the locking device 21 can be designed continuously or only allow locking in certain predetermined rotational positions.
  • the locking device described in more detail below is a locking device of the second type.
  • FIG. 3 shows a partial sectional view of the pump stator on the section line AA in FIG. 2.
  • the locking device 21 consists of a locking pin 22 which can be snapped into recesses in a locking ring 24.
  • the locking ring is shown in Fig. 4 so that the arrangement of the recesses and thus the locking positions for the pump head can be seen.
  • the locking ring 24 is arranged in the opening of the housing 3 and remains connected to the housing.
  • the pump head is inserted into the locking ring 24 and rests on a bearing body 25 which supports the rotary movement and is arranged in a groove in the locking ring 24.
  • the bearing body 25 is, for example, a plastic ring that is made of a material that interacts with the Material of the pump stator provides the desired static or sliding friction coefficients.
  • the locking pin 22 is moved in the longitudinal direction from the recesses of the locking ring 24 by applying a tensile force acting in the longitudinal direction of the locking pin 22 via a handle 26.
  • the tensile force counteracts the restoring force of a spring 27, so that after releasing the handle 26, the locking pin 22 is moved in the direction of the locking ring and can be brought into engagement by rotating the pump head, provided that the locking pin 22 does not already exist when the handle 26 is released was arranged exactly over a recess in the locking ring 24.
  • a quasi-continuous distribution of the possible rotational positions of the pump head can be achieved by increasing the number of recesses on the locking ring 24. In view of practical use, this appears to be sufficient so that a locking device which permits all rotational positions is not absolutely necessary.
  • the pump head 1 and the drive unit 2 can be removed from the pump housing together.
  • the pump housing 3 is the part of a pump housing that is integrated in a heart-lung machine, it is possible to remove the pump head and drive unit from the heart-lung machine and to arrange them in a separate housing for this purpose has a correspondingly adapted opening and possibly also the locking ring 24.
  • the electrical connection line 20 can be extended without difficulty, whereas the hose line in which the patient's blood is conveyed can be shortened, since the pump head and drive unit can be arranged together with the separate housing in the immediate vicinity of the patient.
  • an open section 13 can be adjusted by rotating the pump head so that the shortest possible hose lengths can be used.

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

Claims (14)

  1. Pompe à galets pour machines cardiopulmonaires comprenant
    - une tête de pompe (1) constituée
    -- d'un stator de pompe (4) qui présente un lit d'appui de pompe servant de palier support à une partie de tuyau (9), et un tronçon ouvert (13) pour faire sortir la partie de tuyau, et
    -- d'un rotor de pompe (6), qui est disposé dans le stator de pompe, de manière rotative autour de son axe médian longitudinal, et qui comporte sur un support de galets (7), des galets (8) montés en rotation, qui lors d'un mouvement de rotation du rotor de pompe (6) roulent sur la partie de tuyau (9) déposée dans la tête de pompe (1),
    - une unité d'entraînement (2) destinée à engendrer le mouvement de rotation du rotor de pompe (6), et
    - un carter de pompe (3) destiné au montage de la tête de pompe (1) et à recevoir l'unité d'entraînement (2),
    caractérisée en ce que
    - l'unité d'entraînement (2) est reliée à la tête de pompe (1) de manière telle, que la tête de pompe (1) puisse être tournée, par rapport au carter de pompe (3), dans différentes positions de rotation relativement au tronçon ouvert, dans lesquelles la pompe à galets peut fonctionner.
  2. Pompe à galets selon la revendication 1, caractérisée en ce que la tête de pompe (1) peut tourner autour d'un axe parallèle à l'axe médian longitudinal du rotor de pompe (6).
  3. Pompe à galets selon la revendication 1 ou 2, caractérisée en ce que la tête de pompe (1) peut être retirée du carter de pompe (3).
  4. Pompe à galets selon la revendication 1, caractérisée en ce que l'unité d'entraînement (2) est fixée à la tête de pompe (1) de manière telle, qu'elle puisse tourner en commun avec la tête de pompe (1) par rapport au carter de pompe (3).
  5. Pompe à galets selon la revendication 4, caractérisée en ce que l'unité d'entraînement (2) peut tourner en commun avec la tête de pompe (1), autour d'un axe parallèle à l'axe médian longitudinal du rotor de pompe (6).
  6. Pompe à galets selon la revendication 4 ou 5, caractérisée en ce que l'unité d'entraînement (2) peut être retirée en commun avec la tête de pompe (1), du carter de pompe (3).
  7. Pompe à galets selon l'une des revendications précédentes, caractérisée en ce qu'un dispositif de verrouillage (21) est prévu sur le carter de pompe (3), pour le verrouillage démontable de la tête de pompe (1).
  8. Pompe à galets selon la revendication 7, caractérisée en ce que le dispositif de verrouillage (21) comprend une cheville d'encliquetage (22), qui est disposée de manière axialement coulissante sur le stator de pompe (4), et un anneau d'encliquetage (24) qui est disposé sur le carter de pompe (3) et qui présente des évidements dans lesquels peut s'encliqueter la cheville d'encliquetage (22).
  9. Pompe à galets selon la revendication 8, caractérisée en ce qu'il est prévu un ressort (27), qui coopère avec la cheville d'encliquetage (22), de manière telle, que la cheville d'encliquetage (22) vient s'encliqueter dans l'un des évidements (22) de l'anneau d'encliquetage (24), en raison de la force du ressort.
  10. Pompe à galets selon la revendication 7, caractérisée en ce qu'à l'aide du dispositif de verrouillage, la tête de pompe (1) peut être verrouillée sur le carter de pompe (3), dans une position de rotation quelconque.
  11. Pompe à galets selon la revendication 10, caractérisée en ce que le dispositif de verrouillage comprend un dispositif de serrage et un anneau de serrage, qui est placé sur le carter de pompe (3) et sur lequel il est possible de serrer le dispositif de serrage, de manière telle, que la tête de pompe (1) puisse être fixée au carter de pompe dans une position de rotation quelconque.
  12. Pompe à galets selon l'une des revendications précédentes, caractérisée en ce que l'unité d'entraînement (2) comprend un moteur électrique (17) et une transmission à courroies (16) à deux étages.
  13. Pompe à galets selon la revendication 12, caractérisée en ce que les courroies de la transmission à courroies (16) sont des courroies crantées.
  14. Pompe à galets selon l'une des revendications précédentes, caractérisée en ce qu'une source d'énergie pour l'unité d'entraînement (2) est prévue dans le carter de pompe (3).
EP94102331A 1994-02-16 1994-02-16 Pompe à galets pour machines cardiopulmonaires Expired - Lifetime EP0668443B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP94102331A EP0668443B1 (fr) 1994-02-16 1994-02-16 Pompe à galets pour machines cardiopulmonaires
DE59404780T DE59404780D1 (de) 1994-02-16 1994-02-16 Rollenpumpe für Herz-Lungen-Maschinen
US08/387,609 US5499907A (en) 1994-02-16 1995-02-13 Roller pump for heart-lung machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP94102331A EP0668443B1 (fr) 1994-02-16 1994-02-16 Pompe à galets pour machines cardiopulmonaires

Publications (2)

Publication Number Publication Date
EP0668443A1 EP0668443A1 (fr) 1995-08-23
EP0668443B1 true EP0668443B1 (fr) 1997-12-10

Family

ID=8215687

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94102331A Expired - Lifetime EP0668443B1 (fr) 1994-02-16 1994-02-16 Pompe à galets pour machines cardiopulmonaires

Country Status (3)

Country Link
US (1) US5499907A (fr)
EP (1) EP0668443B1 (fr)
DE (1) DE59404780D1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19810195A1 (de) * 1998-03-10 1999-09-23 Reinhard Salinger Verfahren und Vorrichtung zur Sammlung und Weiterverarbeitung von spezifischen Blutkomponenten bei kontinuierlichen laminaren Strömungsverhältnissen
JP4557452B2 (ja) * 2001-03-13 2010-10-06 日本電産サーボ株式会社 ローラポンプ
US6736617B2 (en) 2002-02-20 2004-05-18 Terumo Cardiovascular Systems Corporation Peristaltic pump having automatically adjusting bushing
JP2004154425A (ja) * 2002-11-07 2004-06-03 Nemoto Kikaku Kogyo Kk 人工心肺装置及び熱交換器
DE10334516B4 (de) 2003-07-29 2006-06-14 Sorin Group Deutschland Gmbh Anzeige- und Bedienvorrichtung für medizintechnische Geräte und Anzeige-/Bedieneinheit dafür
US20070148010A1 (en) * 2003-09-26 2007-06-28 Stephan Michels Peristaltic pump
US8197236B2 (en) * 2008-04-25 2012-06-12 Medtronic, Inc. Adjustable roller pump rotor
DE102010000594B4 (de) * 2010-03-01 2012-07-26 Ulrich Gmbh & Co. Kg Schlauchpumpe

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB467288A (en) * 1936-02-14 1937-06-15 Cyril George Mancha Bennett Improvements in and relating to pumps
GB1353156A (en) * 1970-10-19 1974-05-15 Gillespie F R Peristaltic pumping apparatus
US4260340A (en) * 1978-07-20 1981-04-07 Avri S.A. Electric pump, particularly for windscreen washers
IL61996A0 (en) * 1980-02-04 1981-02-27 Lenton D Improvements in peristaltic pumps
US4540301A (en) * 1983-12-16 1985-09-10 Swanson Dennis E Apparatus for applying liquid coatings
FR2588116B1 (fr) * 1985-10-01 1988-01-08 Framatome Sa Dispositif de verrouillage d'une bague de guidage sur une plaque comportant une ouverture et son application a un tube guide de reacteur nucleaire
US4631008A (en) * 1985-11-04 1986-12-23 G. H. Stenner & Co., Inc. Peristaltic pump housing
US4909713A (en) * 1986-05-07 1990-03-20 Cobe Laboratories, Inc. Peristaltic pump

Also Published As

Publication number Publication date
US5499907A (en) 1996-03-19
DE59404780D1 (de) 1998-01-22
EP0668443A1 (fr) 1995-08-23

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