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FR2495236A1 - Extra-corporeal blood circulation peristaltic pump - combines roller and low-vol. variable oscillatory helical pumps, with electric motor driven drum, in sequence - Google Patents

Extra-corporeal blood circulation peristaltic pump - combines roller and low-vol. variable oscillatory helical pumps, with electric motor driven drum, in sequence Download PDF

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Publication number
FR2495236A1
FR2495236A1 FR8025634A FR8025634A FR2495236A1 FR 2495236 A1 FR2495236 A1 FR 2495236A1 FR 8025634 A FR8025634 A FR 8025634A FR 8025634 A FR8025634 A FR 8025634A FR 2495236 A1 FR2495236 A1 FR 2495236A1
Authority
FR
France
Prior art keywords
drum
pump
inlet
pump according
electric motor
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.)
Withdrawn
Application number
FR8025634A
Other languages
French (fr)
Inventor
Christian Marie Denis Gay
Richard Louis Maurice Venet
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR8025634A priority Critical patent/FR2495236A1/en
Priority to JP56502993A priority patent/JPS57501363A/ja
Priority to PCT/FR1981/000117 priority patent/WO1982000956A1/en
Priority to EP81902623A priority patent/EP0059743A1/en
Publication of FR2495236A1 publication Critical patent/FR2495236A1/en
Withdrawn legal-status Critical Current

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
    • F04B43/12—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
    • 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
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/20—Type thereof
    • A61M60/247—Positive displacement blood pumps
    • A61M60/253—Positive displacement blood pumps including a displacement member directly acting on the blood
    • A61M60/268—Positive displacement blood pumps including a displacement member directly acting on the blood the displacement member being flexible, e.g. membranes, diaphragms or bladders
    • A61M60/279—Peristaltic pumps, e.g. roller pumps
    • 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
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/10—Location thereof with respect to the patient's body
    • A61M60/104—Extracorporeal pumps, i.e. the blood being pumped outside the patient's body
    • A61M60/109—Extracorporeal pumps, i.e. the blood being pumped outside the patient's body incorporated within extracorporeal blood circuits or systems
    • 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
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/40—Details relating to driving
    • A61M60/424—Details relating to driving for positive displacement blood pumps
    • A61M60/438—Details relating to driving for positive displacement blood pumps the force acting on the blood contacting member being mechanical
    • A61M60/441—Details relating to driving for positive displacement blood pumps the force acting on the blood contacting member being mechanical generated by an electromotor
    • 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
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/10—Location thereof with respect to the patient's body
    • A61M60/104—Extracorporeal pumps, i.e. the blood being pumped outside the patient's body
    • A61M60/109—Extracorporeal pumps, i.e. the blood being pumped outside the patient's body incorporated within extracorporeal blood circuits or systems
    • A61M60/113—Extracorporeal pumps, i.e. the blood being pumped outside the patient's body incorporated within extracorporeal blood circuits or systems in other functional devices, e.g. dialysers or heart-lung machines

Landscapes

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

Abstract

A flexible conduit (1) of internal dia. about 10 mm is shaped into a semicircle (2) over a length where it is compressed periodically by rollers (3) revolving at the ends of arms (4), which extend radially from an axis (5) through the centre of the semicircle. The conduit continues into a spiral (7) wound at least once around a drum (6) which it enters and leaves axially. The frequency of oscillatory partial rotations of the drum gives rise to pulsatile flow in the conduit, and is determined by the speed of revolution of a crank (9) connected by a rod (8) to one end of the drum. The amplitude of oscillation may be varied by lengthening or shortening of the crank by an electrical screw jack (10). A flow rate corresp. to the diastolic pressure can be maintained with a non-return valve (11) in the conduit on the output side of the helical pump.

Description

La présente invention est relative à une pompe destinée,notamment, à l'assistance cardiaque et qui pourrait être utilisée lorsque le coeur du patient ne parvient pas à fournir une pression sanguine correcte. The present invention relates to a pump intended, in particular, for cardiac assistance and which could be used when the patient's heart fails to supply correct blood pressure.

Dans une demande de brevet Français antérieure déposée le 12 Septembre 1980 sous le NO 80 I9702 on a décrit une pompe pouvant assurer une circulation extra corporelle durant une intervention chirurgicale sur le coeur du patient par exemple. In a previous French patent application filed on September 12, 1980 under NO 80 I9702, a pump has been described which can ensure extra-bodily circulation during a surgical intervention on the patient's heart, for example.

Cette pompe se caractérisait par l'association d'une pompe à galets et d'une pompe hélicoïdale à mouvement circulaire alternatif permettant d'obtenir une pression pulsée. This pump was characterized by the combination of a roller pump and a helical pump with reciprocating circular motion to obtain a pulsed pressure.

Une telle pompe ne peut pas être utilisée pour assister un malade dont le coeur est en fonctionnement car la pulsation de la pompe doit être rigoureusement identique à celle de la circulation sanguine. Such a pump cannot be used to assist a patient whose heart is in operation because the pulsation of the pump must be strictly identical to that of the blood circulation.

De façon simplifiée, ce problème se traduit mécaniquement par le fait que la fréquence et l'amplitude des oscillations du tambour de la pompe hélicoïdale doivent pouvoir varier à volonté. In a simplified manner, this problem manifests itself mechanically by the fact that the frequency and the amplitude of the oscillations of the drum of the helical pump must be able to vary at will.

Ce résultat ne peut pas être obtenu au moyen du dispositif décrit dans la demande de brevet précitée. This result cannot be obtained by means of the device described in the aforementioned patent application.

Selon la présente invention, le tambour de la pompe hélicoïdale est entraîné par l'entremise diun moteur électrique pas à pas logé à l'intérieur dudit tambour. According to the present invention, the drum of the helical pump is driven by means of an electric stepper motor housed inside said drum.

Du fait du mode d'emploi du moteur pas à pas qui entraîne le tambour dans un sens selon un angle puis dans l'autre selon un angle différent, il en résulte qu'après un certain nombre d'alternances l'axe du tambour a pivoté d'un certain angle.Comme la canalisation de sortie de la pompe doit s'étendre selon l'axe du tambour, il en résulte qu'elle subit une torsion de plus en plus importante qui finit par l'obturer. Cet incon
vénient existe aussi au niveau de la canalisation d'entrée.Due to the manual of the stepping motor which drives the drum in one direction at an angle and then in the other at a different angle, it follows that after a certain number of alternations the axis of the drum has pivoted by a certain angle. As the outlet pipe of the pump must extend along the axis of the drum, it follows that it undergoes an increasingly significant torsion which ends up closing it. This incon
vénient also exists at the inlet pipe.

L'invention remédie à ces inconvénients de la façon suivante:
a)au niveau de la canalisation d'entrée. The invention remedies these drawbacks in the following way:
a) at the inlet pipe.

Cette canalisation traverse un embout rendu solidaire du tambour et débouche dans une chambre annulaire formée par la combinaison d'une gorge circulaire prévue sur ledit embout, d'une bague fixe comportant l'orifice d'entrée et de deux joints, assurant l'étanchéité entre la bague et l'embout, disposés de part et d'autre de ladite gorge. This pipe passes through an end piece made integral with the drum and opens into an annular chamber formed by the combination of a circular groove provided on said end piece, a fixed ring comprising the inlet orifice and two seals, ensuring sealing between the ring and the end piece, arranged on either side of said groove.

b) au niveau de la canalisation de sortie. b) at the outlet pipe.

L'embout précité est traversé axialement par le conduit et est placé en coïncidence avec un orifice de sortie prévu dans le fond d'un boîtier fixe rendu solidaire de la bague précitée et auquel est raccordé l'orifice de sortie, ledit boîtier étant obturé par un joint cooperant avec lui et l'embout tout en ménageant autour de ce dernier une chambre annulaire. The aforementioned end-piece is traversed axially by the duct and is placed in coincidence with an outlet orifice provided in the bottom of a fixed housing made integral with the aforementioned ring and to which the outlet orifice is connected, said housing being closed by a seal cooperating with it and the end piece while providing around the latter an annular chamber.

L'invention sera mieux comprise par la description qui va suivre faite en se réservant au dessin annexé à titre d'exemple indicatif seulement dans lequel la figure unique est une vue en coupe verticale de la pompe. The invention will be better understood from the description which follows, reserving the accompanying drawing by way of indicative example only, in which the single figure is a vertical section view of the pump.

De la façon connue, la pompe est constituée essentiellement par une canalisation I enroulée hélicoïdalement sur un tambour 2. In known manner, the pump consists essentially of a pipe I wound helically on a drum 2.

Selon l'invention, le tambour 2 est entraîné en rotation par un moteur électrique pas à pas 3 logé à l'intérieur dudit tambour et rendu solidaire d'un bâti 4.  According to the invention, the drum 2 is driven in rotation by a stepping electric motor 3 housed inside said drum and made integral with a frame 4.

Le tambour 2 présente un embout 5 pouvant tourillonner librement dans un palier 6 porté par le bati 4.  The drum 2 has a nozzle 5 which can freely rotate in a bearing 6 carried by the frame 4.

l'embout 5 présente une conduite axiale 7 de sortie et une conduite 8 d'entrée. the nozzle 5 has an axial outlet pipe 7 and an inlet pipe 8.

Le conduit 8 débouche, par l'entremise d'une gorge 9 prévue sur l'embout 5, dans une chambre annulaire 10 formée par la coopération de ladite gorge, d'une bague 11, rendue solidaire du palier 6 et de deux joints à lèvre 12. La chambre 10 communique avec l'entrée 13 par l'entremise d'un trou radial 14 de la bague 11.  The conduit 8 opens, by means of a groove 9 provided on the endpiece 5, into an annular chamber 10 formed by the cooperation of said groove, of a ring 11, made integral with the bearing 6 and two seals to lip 12. The chamber 10 communicates with the inlet 13 via a radial hole 14 in the ring 11.

Le conduit 7 débouche en coïncidence avec l'orifice de sortie 15 prévu dans le fond d'un boîtier 16 fixe et rendu solidaire de la bague 11. The duct 7 opens in coincidence with the outlet orifice 15 provided in the bottom of a fixed housing 16 and made integral with the ring 11.

L'étanchéité entre le boîtier 16 et l'embout 5 est assurée par un joint à levre 1 obturant l'espace annulaire ménagé entre ledit embout et la périphérie interne dudit boîtier tout en formant une chambre 18 d'étanchéité. The seal between the housing 16 and the end piece 5 is provided by a lip seal 1 closing the annular space formed between said end piece and the internal periphery of said housing while forming a sealing chamber 18.

La pompe qui vient d'être décrite aspire le sang dans les chambres caraques et diminue le travail du coeur en réalisant une double assistance en débit et en pression. Cette pompe permet d'une part, de diminuer le débit ventriculaire et, d'autre part, les pressions télédiastoliques et systoliques. The pump which has just been described draws blood into the caraques chambers and reduces the work of the heart by carrying out a double assistance in flow and in pressure. This pump allows on the one hand, to decrease the ventricular flow and, on the other hand, the telediastolic and systolic pressures.

Bien entendu, la présente invention ne se limite pas au mode de réalisation décrit et représenté mais s'étend, au contraire, à toutes variantes de formes et dimensions. Of course, the present invention is not limited to the embodiment described and shown but extends, on the contrary, to all variants of shapes and dimensions.

C'est ainsi, entre autres, que l'entrée 13 peut être disposée, selon l'axe du tambour 2, à l'opposé de ltem- bout 5, l'étanchéité étant réalisée par un joint tournant analogue à celui 5-16-17 décrit ci-dessus.  Thus, among other things, the inlet 13 can be arranged, along the axis of the drum 2, opposite the end piece 5, the seal being produced by a rotary joint similar to that 5-16 -17 described above.

C'est ainsi, encore, que l'entrée 13 peut être reliée à la sortie d'une pompe à galets.La pompe à galets peut être connectée en dérivation de façon à être utilisée en cas de défaillance soudaine du muscle cardiaque.  Thus, again, the input 13 can be connected to the output of a roller pump. The roller pump can be connected in bypass so as to be used in the event of sudden failure of the heart muscle.

Claims (8)

REVE2{DICATIONSREVE2 {DICATIONS 1-Pompe destinée,notamment, à l'assistance cardiaque,du genre de celle dite hélicoldale,caractérisée en ce que le tambour (2) de-la pompe (1) est entrainé par l'entremise d'un moteur électrique (3) pas à pas. 1-Pump intended, in particular, for cardiac assistance, of the type of that known as helical, characterized in that the drum (2) of the pump (1) is driven by means of an electric motor (3) step by step. 2-Pompe selon la revendication 1, caractérisée en ce que le tambour (2) est creux et en ce que le moteur (3) est logé à l'intérieur dudit tambour. 2-pump according to claim 1, characterized in that the drum (2) is hollow and in that the motor (3) is housed inside said drum. 3-Pompe selon la revendication 2, caractérisée en ce que le tambour (2) comporte un embout axial (5) présentant deux conduits ( & et 7) respectivement d'entrée et-de sortie,des moyens étant prévus pour raccorder l'entrée et la sortie audit tambour. 3-pump according to claim 2, characterized in that the drum (2) comprises an axial nozzle (5) having two conduits (& and 7) respectively of inlet and outlet, means being provided for connecting the inlet and output to said drum. 4-Pompe selon la revendication 3; caractérisée en ce que le conduit d'entrée (8) débouche,par l'entremise d'une gorge circulaire (9) de l'embout (5),dans une chambre (10j formée par la coopération dudit embout, d'une bague fixe (11) à laquelle est raccordée l'entrée (13) et de deux joints (12) disposés de part et d'autre de ladite gorge. 4-pump according to claim 3; characterized in that the inlet duct (8) opens, by means of a circular groove (9) of the end piece (5), into a chamber (10j formed by the cooperation of said end piece, with a ring fixed (11) to which the inlet (13) is connected and two seals (12) arranged on either side of said groove. 5-Pompe selon l'une quelconque des revendications 3 et 4,caractérisée en ce que le conduit axial (7) de sortie débouche en coïncidence avec un orifice (15) prévu dans le fond d'un boîtier fixe (16),auquel est raccordée la sortie, ledit boîtier étant obturé par un joint (17)coopérant avec l'embout (5) en ménageant une chambre annulaire d'étanchéité (18).  5-pump according to any one of claims 3 and 4, characterized in that the axial outlet duct (7) opens in coincidence with an orifice (15) provided in the bottom of a fixed housing (16), to which is connected the outlet, said housing being closed by a seal (17) cooperating with the end piece (5) by providing an annular sealing chamber (18). 6-Pompe selon la revendication 4, caractérisée en ce que l'entrée (13) est disposée selon l'axe du tambour (2), à l'opposé de la sortie (15), l'étanchéité étant réalisée par l'entremise d'un joint tournant analogue à celui décrit à la revendication 4. 6-pump according to claim 4, characterized in that the inlet (13) is arranged along the axis of the drum (2), opposite the outlet (15), the sealing being achieved through a rotary joint similar to that described in claim 4. 7-Pompe selon l'une quelconque des revendications 1 à 6, caractérisée en ce que l'entrée (13) est reliée à la sortie d'une pompe à galets. 7-Pump according to any one of claims 1 to 6, characterized in that the inlet (13) is connected to the outlet of a roller pump. 8-Pompe selon la revendication 7,caractérisée en ce que la pompe à galets est montée en dérivation sur le circuit.  8-Pump according to claim 7, characterized in that the roller pump is mounted in bypass on the circuit.
FR8025634A 1980-09-12 1980-12-03 Extra-corporeal blood circulation peristaltic pump - combines roller and low-vol. variable oscillatory helical pumps, with electric motor driven drum, in sequence Withdrawn FR2495236A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR8025634A FR2495236A1 (en) 1980-12-03 1980-12-03 Extra-corporeal blood circulation peristaltic pump - combines roller and low-vol. variable oscillatory helical pumps, with electric motor driven drum, in sequence
JP56502993A JPS57501363A (en) 1980-09-12 1981-09-11
PCT/FR1981/000117 WO1982000956A1 (en) 1980-09-12 1981-09-11 Pump intended to provide blood circulation
EP81902623A EP0059743A1 (en) 1980-09-12 1981-09-11 Pump intended to provide blood circulation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8025634A FR2495236A1 (en) 1980-12-03 1980-12-03 Extra-corporeal blood circulation peristaltic pump - combines roller and low-vol. variable oscillatory helical pumps, with electric motor driven drum, in sequence

Publications (1)

Publication Number Publication Date
FR2495236A1 true FR2495236A1 (en) 1982-06-04

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Application Number Title Priority Date Filing Date
FR8025634A Withdrawn FR2495236A1 (en) 1980-09-12 1980-12-03 Extra-corporeal blood circulation peristaltic pump - combines roller and low-vol. variable oscillatory helical pumps, with electric motor driven drum, in sequence

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Country Link
FR (1) FR2495236A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2387041A1 (en) * 1977-04-15 1978-11-10 Avco Corp BLOOD PUMP
FR2389382A1 (en) * 1977-05-06 1978-12-01 Anvar
FR2401339A1 (en) * 1977-08-23 1979-03-23 Bauknecht Gmbh G Axial flow pump with liq. inlet through motor rotor - has rotor mounted on central tube integral with pump casing
US4227101A (en) * 1978-06-05 1980-10-07 Transicoil, Inc. Stepper motor and adaptor ring

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2387041A1 (en) * 1977-04-15 1978-11-10 Avco Corp BLOOD PUMP
FR2389382A1 (en) * 1977-05-06 1978-12-01 Anvar
FR2401339A1 (en) * 1977-08-23 1979-03-23 Bauknecht Gmbh G Axial flow pump with liq. inlet through motor rotor - has rotor mounted on central tube integral with pump casing
US4227101A (en) * 1978-06-05 1980-10-07 Transicoil, Inc. Stepper motor and adaptor ring

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