EP1171242B1 - Appareil de centrifugation de liquide et utilisation de cet appareil - Google Patents
Appareil de centrifugation de liquide et utilisation de cet appareil Download PDFInfo
- Publication number
- EP1171242B1 EP1171242B1 EP00912863A EP00912863A EP1171242B1 EP 1171242 B1 EP1171242 B1 EP 1171242B1 EP 00912863 A EP00912863 A EP 00912863A EP 00912863 A EP00912863 A EP 00912863A EP 1171242 B1 EP1171242 B1 EP 1171242B1
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- EP
- European Patent Office
- Prior art keywords
- centrifuging
- piston
- coupling means
- passage
- driving member
- 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
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
- B04B9/08—Arrangement or disposition of transmission gearing ; Couplings; Brakes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B5/00—Other centrifuges
- B04B5/04—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers
- B04B5/0442—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers with means for adding or withdrawing liquid substances during the centrifugation, e.g. continuous centrifugation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B5/00—Other centrifuges
- B04B5/04—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers
- B04B5/0442—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers with means for adding or withdrawing liquid substances during the centrifugation, e.g. continuous centrifugation
- B04B2005/045—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers with means for adding or withdrawing liquid substances during the centrifugation, e.g. continuous centrifugation having annular separation channels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B13/00—Control arrangements specially designed for centrifuges; Programme control of centrifuges
- B04B2013/006—Interface detection or monitoring of separated components
Definitions
- the present invention relates to a centrifuge apparatus liquid, especially blood, containing suspended particles
- a centrifuge apparatus liquid especially blood, containing suspended particles
- centrifuge devices are well known especially in the field of blood centrifugation, since they allow the centrifuge rotor to be connected outside to supply it with liquid to be centrifuged and remove the separate components without using seal. Indeed, it is known from US 3,586,413 that if you have a flexible duct forming an open loop and whose two ends are coaxial, that one is fixed while the other rotates at 2 ⁇ speed around the axis common to these two ends and that the loop is driven at speed ⁇ , the flexible duct rotates around its own axis at speed - ⁇ , canceling the induced twist by the rotation of the rotor.
- the centrifuge rotor In the case of blood centrifugation, the separation must be changed for each donor or each different patient. Given the centrifugal forces required to obtain the desired separation of the constituents, the centrifuge rotor must be able to withstand the forces centrifugal to which it is subjected, it must be sized suitably it must be balanced to avoid unbalance and it must be fixed securely on the axle of rotation.
- US 4,790,807 relates to a rigid enclosure but flexible formed by a split ring, both of which end are spread apart. To set up this speaker in the support rotor, the two ends are brought together of the split ring which is then retained in a housing of the rotor by its elasticity.
- the drive shaft of this rotor is constituted by a tubular element allowing the passage of the liquid conduits to centrifuge and constituents from the separation.
- the outside of the tube has an annular surface gear intended to engage a pinion of the mechanism device drive, a first profile disc convex is placed on one side of the annular toothed surface and is intended to engage with three guide pulleys with concave profiles.
- a second disc, placed on the other side of this toothed annular surface is engaged with three other guide rollers.
- US-A-4,261,507 discloses a blood centrifuge apparatus, in which the centrifuge member is reversibly attached to the first drive member by means of a clamp and a spring.
- the object of the present invention is to remedy, less in part to the disadvantages of the above-mentioned solutions.
- this invention relates to an apparatus for centrifuging liquid, especially blood, of the type above, as defined by claim 1.
- This invention also relates to a use of this centrifuge, as defined by claim 24.
- the apparatus according to the invention is therefore of the type in which the circular centrifuge member forms a single disposable member, integral with the conduits used for feeding and the collection of liquids.
- the fixation of the organ circular centrifugation on its drive member is obtained by manual latching.
- the fixing system is not subject to centrifugal forces since it works axially. Once the attachment is obtained, there is therefore no risk of untimely separation.
- the dropout of the centrifuge unit requires only a simple pull axial against elastic spring pressure holding. No other mechanical element than the second coupling element is not located on the centrifuge member, so this one constitutes a simple piece and cheap to make.
- the centrifuge apparatus illustrated in FIG. 1, intended in particular for plasmapheresis, comprises a rotor centrifugation or first drive member, having the shape of a disc 1 arranged at the end of a tubular body 1a, pivotally mounted in two ball bearings P1, P2.
- This centrifuge rotor 1 carries a centrifuge bowl 2 or disposable centrifuge member, formed itself by the union of two parts welded or glued one to the other, the lower one, formed by a disc 2a and the other upper 2b, having two cylindrical side walls and concentric, one inside 2c and the other 2d exterior between which an enclosure is formed separation ring 3 or peripheral separation chamber ( Figures 1 and 2).
- Channel 4 constitutes the blood supply channel to be centrifuged. he has a partition 7 which joins the side wall 2d of the annular separation enclosure 3, while the other wall of this feed channel 4 stops at the side wall internal 2c of this separation enclosure 3.
- the partition 7 also serves to separate the channel 4 from the channel 5 intended for the recovery of blood cells, of which the other partition 8 stops at a certain distance from the 2d external side wall of the annular enclosure of separation 3.
- This partition 8 therefore separates channels 5 and 6 and communicates them respectively with the external party of the annular separation enclosure 3, that is to say that where the blood cells are concentrated, that of lower density where the plasma is concentrated.
- subsequent separation of recovered blood cells is possible to separate red blood cells, red blood cells blanks and pads.
- These three channels 4, 5 and 6 lead to the center of the bowl 2 where they are connected to three conduits 4a, 5a, respectively 6a ( Figure 4) which are preferably arranged parallel in the same flexible tubular element 9.
- the portion of this tubular element 9, adjacent to its end connected to channels 4, 5 and 6 is held in a housing tubular 10 formed coaxially with the axis of rotation of the bowl 2, on the upper part 2b thereof.
- the sections of the three conduits 4a, 5a, 6a are elliptical, the major axes of these ellipses being tangent to at least one circle concentric with the longitudinal axis of the tubular element 9. This orientation of the elliptical sections of the conduits 4a, 5a, 6a, facilitates the rotation of the tubular element around its longitudinal axis.
- the movable part called to be discarded after each use does not consist that of three parts, the bowl 2 formed of two parts 2a, 2b welded or glued to each other and the tubular element 9. In addition, this set does not require any seal sealing. This set is removably connected to the centrifuge rotor 1 as described below.
- the bottom of the disc forming the lower part 2a of the bowl 2 carries a coupling element constituted by a tenon or a cylindrical rod 11, having a groove 11a of semi-circular section, adjacent to one end frustoconical 11b.
- This coupling rod 11 is engaged in a coupling element formed by a ring 12, of a coupling mechanism 13, this ring and this mechanism of coupling being housed in the tubular part 1a of the rotor 1.
- the coupling mechanism 13 includes a coupling means which, in this embodiment, consists by a ring of balls 16 which is located at the end internal of the axial passage formed by the ring 12 secured to the tubular part 1a of the rotor 1.
- a tubular piston 17 is slidably mounted in the tubular part 1a. Its end upper ends with a funnel-shaped surface 17a.
- This tubular piston 17 is pressed axially against the inner end of the ring 12 by a spring helical 18 compressed between one end of the part the la of the rotor 1 and a bearing of the tubular piston 17.
- This axial pressure in the direction of the ring 12 and the funnel shape 17a have the effect of exerting forces centripetals on the crown of balls 16 which presses them into the groove 11a of the coupling stud 11 of the bowl 2.
- a second piston 14 is slidably mounted inside the tubular piston 17 and a second spring helical 19 pushes it axially against the end of the coupling member 11.
- the ring of balls 16 could be replaced by a split ring-type spring piano, or by a coil spring forming a O-ring spring, both ends of which would then brought together by the funnel 17a under the coil spring pressure 18, thereby reducing its diameter to keep it engaged with the groove 11a of the coupling stud.
- the outer end of the tubular piston 17 is integral a gripping member 20 intended to allow exercise an axial traction opposite to the pressure of the spring 18, to allow the balls 16 to move outward.
- the piston 14 subjected to the axial pressure of the spring 19 can then eject bowl 2 upwards and maintain simultaneously the spaced balls 16.
- the upper surface of the disc carrying this bowl 2 has a slight clearance 1b, which ensures good contact with the peripheral annular surface of this disc.
- the axial position of the groove 11a of the coupling stud 11 can be chosen to be normally still very partially in the axial passage of the ring 12 of so that the engagement of the balls 16 in this groove 11a induces a very slight deflection of the center of the bottom of the bowl 2, which allows the disengagement 1b of the rotor disk 1, thus ensuring sufficient contact between this disc and the bowl 2 to guarantee a friction drive of the latter. In case this friction is not sufficient, radial grooves could be provided for prevent the bowl 2 from sliding relative to the disc rotor 1.
- the ball bearings P1, P2 of the tubular part 1a of the rotor are mounted in a support element 21 fixed to a plate 22, itself fixed to an upper disc 26 by four columns 15, two of which are located behind bowl 2 are visible in Figures 1 and 3, the other two being arranged symmetrically with respect to a drive shaft 23 parallel to the axis of the rotor 1. Thanks to this arrangement, the side of the centrifuge opposite the shaft training is free, allowing the introduction side of the bowl 2 and the positioning of the element tubular 9. This allows easy access to the centrifugation 2 and easily carry out its positioning and its removal.
- the drive shaft 23 is pivotally mounted through two ball bearings 24, 25, respectively integral with the plate 22 and the upper disc 26 located above the bowl 2.
- This upper disc 26 is integral with the drive shaft 27 of a motor 28, coaxial to the axis of rotation of the rotor 1.
- the end of the shaft 23 which extends above the disc 26 is integral with a satellite pinion 29 in engagement with a fixed pinion 30.
- the ratio between the diameters of the satellite pinion 29 and the fixed gear 30 is 1/1, so that if the speed of rotation of the plate 26 is ⁇ , that of the shaft 23 around its axis is 2 ⁇ .
- the lower end of this shaft 23 carries a toothed pinion 31 connected by a toothed belt 32 to a toothed pinion 33, of the same diameter as the toothed pinion 31, so that the rotor 1 is driven at speed 2 ⁇ .
- the flexible tubular element 9 forms an open loop one end of which 9a is fixed and coaxial with the pivot axis of the rotor 1. This end 9a is fixed and held in a tubular connector housing 10 'similar to the housing 10 supporting the other end of this element tubular 9.
- a tubular connector housing 10 ' similar to the housing 10 supporting the other end of this element tubular 9.
- Each of these tubular elements 10 and 10 ' presents a sort of funnel 10a, respectively 10'a (fig. 5) which gives support to this part of the element tubular 9 when subjected to centrifugal force.
- This loop passes through an opening 22a formed in the plate 22, so that it is driven around the pivot axis of rotor 1 at speed ⁇ , while its end secured to the center of the bowl 2 is driven at speed 2 ⁇ and that the other end 9a is fixed, of so that the flexible element is entrained between these two ends at speed - ⁇ around its longitudinal axis canceling any accumulation of torsion between these two ends.
- a support surface 22b secured to the plate 22 serves to limit the deformation of the tubular element 9 under the effect of centrifugal force.
- Guide parts of the tubular element 9 are preferably made of a material self-lubricating or low coefficient of friction, such as Oilamid®, bronze-Teflon® or Valflon®.
- the three conduits 4a, 5a, 6a separate and the conduit of plasma 6a is associated with a flow control valve 34 depending on the position of the separation surface between plasma and blood cells in the separation chamber 3.
- a double prism 3a is formed at the end top of the separation enclosure 3 and came in one piece with the upper part 2b of the bowl 2 during its injection.
- the portion of this double prism 3a which is covered by the separated blood cells of plasma by centrifugal force following rotation of bowl 2 is opaque, while the part which emerges in the plasma is transparent.
- An optical device 35 comprising a laser and a photoelectric detector is arranged opposite this prism 3a, so that the detector photoelectric receives the light reflected from the part of the double prism 3a which emerges in the transparent plasma.
- a proportional duration signal at the angular value of the transparent area of double prism 3a is thus supplied to an amplifier 36 whose outlet is connected to the proportional valve 34.
- the amplifier 36 will control the proportional valve 34 so that it reduces, respectively so that it increases the section of the plasma evacuation duct 6a, making it possible to maintain by this adjustment, the balance between the flows in the outlet conduits 5a and 6a, depending on a flow rate input determined by the blood supply pump into the conduit 4a, itself determined by the venous pressure from the donor arm.
- the dimensioning of the centrifuge bowl 2 and of the tubular element 9 forming the open loop are chosen to reduce the size, weight, the price and volume, both of this bowl 2 and of the whole centrifuge, including sizing is essentially dependent on the diameter of the centrifuge bowl. If the diameter decreases, it is necessary to increase speed. The increase in this may be limited by increasing the height of the centrifuge chamber 3, so that the maximum flow resulting remains practically constant, this being determined by obtaining good cell sedimentation blood.
- the diameter of the bowl is 80 mm and its height is substantially equal to its radius.
- Such diameter corresponds to about a third of that of the rotors of separation of the state of the art. Therefore, the length of the open loop formed by the tubular conduit 9 therefore corresponds substantially to one third of the loops of the state of the art.
- the tensile force exerted on it by the centrifugal force to which it is subjected can be kept at a constant value.
- the material of the tubular element is plasticized PVC or silicone whose specific weight is 1.2 g / cm 3 , as in the state of the art.
- This sizing example shows that it is completely made possible to very significantly reduce the diameter of the separation enclosure without loss of performance and without increased constraints as far as some measures are taken to this effect. Now, this reduction in diameter reduces the size of the device so extremely important. This allows to have a device much more compact, lighter and less expensive to manufacture. This device taking up little space, we can install more devices on the same surface, which is important, especially in the case of trucks used for the plasma collection where space is reduced.
- the rotating part according to the invention weighs about 600 g while the rotors of the devices of the state of the art weigh almost five times what weight. This is the reason why in the collection of blood, plasmapheresis is generally not performed directly but blood is collected in pockets flexible tubes which are then placed in very large centrifuges. In this case, it is no longer possible to return the donor has red blood cells. However, the time for the body reproduce the amount of red blood cells is long, which is why several months must necessarily separate two blood donations for the same donor, this which would not be necessary if red blood cells could be reinjected into it after separation. This is not possible only if the separation is done simultaneously with the blood test.
- Another important aspect of this invention is in that the complete circulation of the liquid is obtained by the overpressure with which the blood is brought in the centrifuge bowl 2.
- This overpressure must compensate for the pressure losses induced in the duct supply 4a as well as in the recovery conduits blood cells 5a and plasma 6a.
- To create this overpressure can advantageously use a pump peristaltic, intended to ensure the desired flow downstream of the separation. No peristaltic suction pump outgoing components is therefore not necessary, the regulation of the plasma flow being obtained by the regulating valve 34, controlled by its servo system according to the variation of position of the border between the plasma and blood cells.
- this device is particularly suitable for use to perform online plasmapheresis with the blood test, it can of course also be used in therapeutic applications.
- the tubular element 9 containing the three conduits 4a, 5a, 6a is calculated with a factor of security of 5 for continuous use exceeding 5 hours, which allows its use in all applications conceivable.
- the apparatus which is the subject of the present invention can also be used for washing blood cells by introducing alternatively with suitable means known in the domain, the cells to be washed and a washing liquid.
- the washing liquid could be introduced by an additional conduit, allowing to simultaneously perform separation and washing.
- the element tubular 9 should then have four conduits instead of the three represented.
- the two discs 22 and 26 of the previous embodiment are replaced by two diametrical arms 22 ', 26' which are come from a single piece of aluminum with two pillars 37 and 38 diametrically opposed.
- the arm 26 ' has a hub 26 'which is driven onto the shaft 27 of the motor 28.
- the pillar 37 has a cylindrical passage 39 intended for the passage of the drive shaft 23.
- the other pillar 38 is integral a support 40 having a guide chute 41 of the tubular element 9.
- Support 40 is designed to support the element flexible tubular 9 in the area where its radius is greatest large, therefore where the centrifugal force is most important.
- the funnel 10a supports the central part of the element tubular 9.
- the support 40 is made, like the support 22b of the embodiment of FIG. 1, made of a material with low coefficient of friction.
- a high weight polyethylene molecular (PEHMW) we could also use a high weight polyethylene molecular (PEHMW).
- PEHMW polyethylene molecular
- rollers 42 in the support chute 40 freely rotated around axes parallel to that of the element tubular 9. These rollers 42 are driven by the rotation of the tubular element 9 on itself.
- the rest of the centrifuge corresponds to the embodiment described above.
- the variant described in connection with Figures 5 and 6 facilitates balancing and increases the security of the device when rotates at centrifugation speed. It improves also guiding and supporting the tubular element 9, which is thus very little subjected to centrifugal force.
Description
et R, rayon de la boucle formée par cet élément tubulaire.
Claims (24)
- Appareil de centrifugation de liquide, notamment de sang, contenant des particules en suspension comprenant:un premier organe d'entraínement (1) monté pivotant,un second organe d'entraínement (22) monté pivotant; coaxial au premier organe d'entraínement (1),des moyens (23-33) pour entraíner ledit premier (1) et ledit second (22) organe d'entraínement, avec un rapport de leurs vitesses de rotation angulaire respectives de 2:1,un organe de centrifugation (2) dudit liquide, muni d'au moins trois canaux (4, 5, 6) reliant son centre à une chambre de séparation périphérique (3),au moins trois conduits (4a, 5a, 6a) en matériau déformable élastiquement présentant chacun une première extrémité solidaire de l'extrémité centrale d'un canal respectif (4, 5, 6) dudit organe de centrifugation (2) et une seconde extrémité fixe et coaxiale à la première, chaque conduit (4a, Sa, 6a) formant une boucle ouverte autour dudit organe de centrifugation (2), une portion de chaque boucle étant cinématiquement solidaire dudit second organe d'entraínement (22), l'un desdits conduits (4a, 5a, 6a) étant relié à une source d'alimentation dudit liquide à centrifuger, au moins un autre servant à récupérer un composant du liquide,des premiers moyens d'accouplement (16, 17, 17a) solidaires dudit premier organe d'entraínement (1),des seconds moyens d'accouplement (11) solidaires dudit organe de centrifugation (2), etdes moyens élastiques (18) pour mettre en prise l'un avec l'autre lesdits premiers (16) et seconds (11) moyens d'accouplement, de manière à fixer l'organe de centrifugation (2) au premier organe d'entraínement (1), caractérisé en ce que
lesdits canaux (4, 5, 6), ladite chambre de séparation et lesdits seconds moyens d'accouplement (11) sont partie intégrante dudit organe de centrifugation (2) et que
lesdits premiers (16, 17, 17a) et seconds (11) moyens d'accouplement et lesdits moyens élastiques (18) sont coaxiaux à l'axe de pivotement desdits organes d'entraínement (1, 22), lesdits premiers moyens d'accouplement (16, 17, 17a) étant susceptibles d'être déplacés le long dudit axe de pivotement à l'encontre de la pression desdits moyens élastiques. - Appareil selon la revendication 1, caractérisé en ce qu'il comporte un organe de commande mobile (17) relié auxdits moyens élastiques (18) de sorte que le mouvement de l'organe de commande (17) opposé à la force exercée par les moyens élastiques permet de dégager lesdits moyens d'accouplement (11, 16) les uns des autres.
- Appareil selon la revendication 1, caractérisé en ce que lesdits moyens élastiques (18) entraínent un piston mobile (17) en prise avec les premiers moyens d'accouplement (16) provoquant la mise en contact des premiers et seconds moyens d'accouplement (16, 11).
- Appareil selon la revendication 1, caractérisé en ce que lesdits seconds moyens d'accouplement (11) exercent sur lesdits moyens élastiques (18) une force supérieure et de sens contraire à celle qui tend à mettre en prise l'un avec l'autre lesdits premier (16) et second (11) moyens d'accouplement, lors de la mise en place dudit organe de centrifugation (2) sur ledit premier organe d'entraínement (1).
- Appareil selon la revendication 1, caractérisé en ce que le premier organe d'entraínement (1) comprend un passage axial et les premiers moyens d'accouplement (16) sont une couronne de billes disposée circonférentiellement à l'intérieur du passage axial dudit premier organe d'entraínement.
- Appareil selon la revendication 5, caractérisé en ce que les seconds (11) desdits moyens d'accouplement comportent une extrémité tronconique (11b) pour déplacer temporairement ladite couronne de billes (16) dans une direction générale radiale lorsque les seconds moyens d'accouplement (11) sont insérés dans le passage axial.
- Appareil selon la revendication 5, caractérisé en ce que l'organe de centrifugation (2) comporte une partie inférieure (2a) et les seconds moyens d'accouplement (11) sont constitués par une tige faisant saillie de la partie inférieure (2a) de l'élément de centrifugation (2), la tige présentant une gorge circonférentielle (11a) dimensionnée pour recevoir une portion de ladite couronne de billes (16) lorsque l'organe de centrifugation (2) est monté sur le premier organe d'entraínement (1).
- Appareil selon la revendication 7, caractérisé en ce qu'il comporte un premier piston mobile (17) couplé audit moyens élastiques (18) de sorte que le mouvement dudit premier piston (17) en direction opposée à la force exercée par lesdits moyens élastiques (18) permet de séparer les premiers moyens d'accouplement (16) des seconds moyens d'accouplement (11).
- Appareil selon la revendication 8, caractérisé en ce que le premier piston (17) présente une surface en forme d'entonnoir (17a) telle que, consécutivement à la force axiale desdits moyens élastiques (18), le premier piston (17) soumet ladite couronne de billes (16) à une force centripète, fixant ainsi l'élément de centrifugation (2) au premier organe d'entraínement (1).
- Appareil selon la revendication 9, caractérisé en ce qu'il comporte un élément de préhension (20) solidaire du dudit premier piston (17) pour permettre de déplacer ce premier piston (17) à l'encontre desdits moyens élastiques (18), écartant ainsi la surface en entonnoir (17a) du premier piston (17) de la couronne de billes (16), les libérant de la force centripète.
- Appareil selon la revendication 10, caractérisé en ce qu'un second piston (14) est monté coulissant à l'intérieur dudit premier piston (17), des seconds moyens élastiques (19) poussant ce second piston (14) en direction de l'extrémité interne dudit passage axial (12), la course de ce second piston (14) étant choisie pour le faire pénétrer dans ledit passage axial (12) lors de la séparation dudit organe de centrifugation (2) dudit premier organe d'entraínement (1) et pour retenir ladite couronne de billes (16) dans ledit entonnoir (17a) dudit premier piston (17).
- Appareil selon la revendication 11, caractérisé en ce que la pression exercée sur le second piston (14) par lesdits seconds moyens élastiques (19) est apte à éjecter ledit organe de centrifugation (2) lors de la séparation desdits premier et second moyens d'accouplement (11, 16).
- Appareil selon la revendication 1, caractérisé en ce qu'un (6a) desdits conduits destiné à être relié à un collecteur de l'un des composants issu de la centrifugation comporte une valve proportionnelle (34), des moyens de détection (35) étant disposés en amont de ce conduit (6a) pour mesurer le degré de pureté du composant devant s'écouler par ledit conduit, ce détecteur étant relié à ladite valve proportionnelle (34) pour régler le débit dans ledit conduit (6a) en fonction dudit degré de pureté mesuré.
- Appareil selon la revendication 6, caractérisé en ce qu'un double prisme (3a) est disposé dans ladite chambre de séparation (3), lesdits moyens de détection (35) comportant un faisceau lumineux fixe par rapport audit organe de centrifugation (2) dirigé dans la trajectoire de ce double prisme (3a) et un détecteur photoélectrique pour mesurer la valeur angulaire de la portion de ce double prisme émergeant de la couche de cellules du sang dans le plasma et délivrer à un organe de commande (36) de ladite valve proportionnelle (34), un signal caractéristique de cette valeur angulaire.
- Appareil selon larevendication 1, caractérisé en ce qu'un espace est ménagé latéralement auxdits premier et second organes d'entraínement (1, 22) pour permettre le passage dudit organe de centrifugation (2).
- Appareil selon l'une des revendications précédentes, caractérisé en ce que ledit organe de centrifugation circulaire (2) comporte deux parties (2a, 2b) assemblées l'une à l'autre de façon étanche et que lesdits trois conduits (4a, 5a, 6a) forment un seul élément tubulaire,
dans lequel trois conduits séparés sont ménagés, une extré mité de cet élément tubulaire étant fixée de manière étanche coaxialement à l'axe de rotation dudit organe de centrifugation (2). - Appareil selon l'une des revendications précédentes, caractérisé en ce que les parties de l'appareil en contact avec ledit élément tubulaire (9) sont en un matériau autolubrifiant ou à faible coefficient de frottement.
- Appareil selon l'une des revendications précédentes, caractérisé en ce qu'il comporte un quatrième conduit dont deux sont reliés respectivement à une source sous pression de globules rouges et un autre à une source sous pression de liquide de lavage de ces globules rouges.
- Appareil selon l'une des revendications 1 à 18, caractérisé en ce que l'un desdits conduits (4a, 5a, 6a) est relié alternativement à une source sous pression de globules rouge et à une source sous pression de liquide de lavage de ces globules rouges.
- Appareil selon l'une des revendications précédentes, caractérisé en ce que ledit second organe d'entraínement (22') et un élément (26'), solidaire des moyens (27, 28) pour entraíner ce second organe d'entraínement forment une seule et même pièce.
- Appareil selon l'une des revendications 1 à 3, caractérisé en ce que des cannelures radiales pour augmenter la force de frottement sont ménagées sur au moins l'une des surfaces en contact dudit premier organe d'entraínement (1) et dudit organe de centrifugation (2).
- Appareil selon la revendication 1, caractérisé en ce que l'un (1) desdits organes assemblés par lesdits moyens d'accouplement (11, 16) comprend un passage axial (12) à une extrémité interne duquel est disposée coaxialement une couronne de billes (16), que l'autre (2) desdits moyens d'accouplement comporte un tenon (11) dont le diamètre correspond à celui dudit passage axial (12) et dont la longueur dépasse celle de ce passage, la partie de ce tenon (11) faisant saillie de ce passage axial (12) comportant une gorge annulaire (11a), dimensionnée pour recevoir partiellement ladite couronne de billes (16) et adjacente à une extrémité tronconique (11b) de ce tenon (11) et en ce qu'un piston tubulaire (17) dont une extrémité présente une forme d'entonnoir (17a) conformée pour recevoir ladite couronne de billes (16), est associé auxdits moyens élastiques (18) pour presser axialement ce piston (17) en direction de l'extrémité dudit passage (12) adjacente à ladite couronne de billes (16) pour y appliquer cette couronne (16) en exerçant sur elle une pression centripète afin d'appliquer lesdites billes (16) dans ladite gorge annulaire (11a), un organe de préhension (20) étant solidaire dudit piston tubulaire (17) pour permettre de le déplacer à l'encontre desdits moyens élastiques (18).
- Appareil selon la revendication 1, caractérisé en ce que lesdits premier et second moyens d'accouplement (1, 2) comprennent, d'une part un élément élastique annulaire fendu (16), disposé coaxialement à une extrémité interne d'un passage (12) axial de ce premier organe d'entraínement (1) dont la section est inférieure au diamètre de cet élément élastique (16) et un piston tubulaire (17) dont une extrémité présente une forme d'entonnoir (17a) conformée pour recevoir ledit élément (16), lesdits moyens élastiques (18) pressant axialement ce piston (17) en direction de l'extrémité interne dudit passage (12) pour y appliquer ledit élément élastique annulaire fendu (16) en le resserrant radialement afin que son diamètre intérieur soit inférieur à celui dudit passage (12), un organe de préhension (20) solidaire dudit piston tubulaire (17) pour le déplacer à l'encontre desdits moyens élastiques et, d'autre part, un tenon (11) dont la section est complémentaire de celle dudit passage (12), ce tenon (11) présentant une gorge (11a), située à la sortie dudit passage (12) pour recevoir ledit élément annulaire fendu (16) et adjacente à une extrémité conique (11b) destinée à permettre l'ouverture de cet élément annulaire fendu (16) lors de l'introduction de ce tenon (11) dans ledit passage axial (12), pour amener ladite gorge (11a) en face de cet élément annulaire fendu (16) afin de lui permettre de s'y engager et de fixer cet organe de centrifugation (2) à l'organe d'entraínement (1) et en ce qu'un organe de préhension (20) est solidaire dudit piston tubulaire (17) pour permettre de le déplacer à l'encontre desdits moyens élastiques (18).
- Utilisation de l'appareil de centrifugation selon l'une des revendications précédentes, caractérisée en ce que l'on met le liquide à centrifuger sous une pression choisie pour vaincre les pertes de charge et assurer le débit désiré dudit liquide.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00912863A EP1171242B1 (fr) | 1999-04-09 | 2000-04-07 | Appareil de centrifugation de liquide et utilisation de cet appareil |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99810294 | 1999-04-09 | ||
EP99810294A EP1043071A1 (fr) | 1999-04-09 | 1999-04-09 | Appareil de cetrifugation de liquide et utillisation de cet appareil |
EP00912863A EP1171242B1 (fr) | 1999-04-09 | 2000-04-07 | Appareil de centrifugation de liquide et utilisation de cet appareil |
PCT/IB2000/000436 WO2000061294A1 (fr) | 1999-04-09 | 2000-04-07 | Appareil de centrifugation de liquide et utilisation de cet appareil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1171242A1 EP1171242A1 (fr) | 2002-01-16 |
EP1171242B1 true EP1171242B1 (fr) | 2003-07-02 |
Family
ID=8242758
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99810294A Withdrawn EP1043071A1 (fr) | 1999-04-09 | 1999-04-09 | Appareil de cetrifugation de liquide et utillisation de cet appareil |
EP00912863A Expired - Lifetime EP1171242B1 (fr) | 1999-04-09 | 2000-04-07 | Appareil de centrifugation de liquide et utilisation de cet appareil |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99810294A Withdrawn EP1043071A1 (fr) | 1999-04-09 | 1999-04-09 | Appareil de cetrifugation de liquide et utillisation de cet appareil |
Country Status (6)
Country | Link |
---|---|
US (1) | US6709377B1 (fr) |
EP (2) | EP1043071A1 (fr) |
JP (1) | JP4463997B2 (fr) |
AU (1) | AU3450400A (fr) |
DE (1) | DE60003656T2 (fr) |
WO (1) | WO2000061294A1 (fr) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1043071A1 (fr) | 1999-04-09 | 2000-10-11 | Jean-Denis Rochat | Appareil de cetrifugation de liquide et utillisation de cet appareil |
EP1043072A1 (fr) * | 1999-04-09 | 2000-10-11 | Jean-Denis Rochat | Dispositif de centrifugation et utilisation de ce dispositif |
US6524231B1 (en) * | 1999-09-03 | 2003-02-25 | Baxter International Inc. | Blood separation chamber with constricted interior channel and recessed passage |
WO2002081007A2 (fr) * | 2001-04-09 | 2002-10-17 | Medtronic, Inc. | Procedes permettant d'isoler des composants sanguins a l'aide d'une microcentrifugeuse et utilisations correspondantes |
US7479123B2 (en) * | 2002-03-04 | 2009-01-20 | Therakos, Inc. | Method for collecting a desired blood component and performing a photopheresis treatment |
US7211037B2 (en) | 2002-03-04 | 2007-05-01 | Therakos, Inc. | Apparatus for the continuous separation of biological fluids into components and method of using same |
US7186230B2 (en) * | 2002-03-04 | 2007-03-06 | Therakos, Inc | Method and apparatus for the continuous separation of biological fluids into components |
US20040127840A1 (en) * | 2002-03-04 | 2004-07-01 | Steve Gara | Blood separation apparatus and method of using the same |
US7297272B2 (en) * | 2002-10-24 | 2007-11-20 | Fenwal, Inc. | Separation apparatus and method |
US20050049539A1 (en) * | 2003-09-03 | 2005-03-03 | O'hara Gerald P. | Control system for driving fluids through an extracorporeal blood circuit |
US7476209B2 (en) * | 2004-12-21 | 2009-01-13 | Therakos, Inc. | Method and apparatus for collecting a blood component and performing a photopheresis treatment |
DK2433713T3 (en) | 2007-12-07 | 2017-09-25 | Miltenyi Biotec Gmbh | CELL PROCESSING SYSTEMS AND PROCEDURES |
US8685258B2 (en) * | 2008-02-27 | 2014-04-01 | Fenwal, Inc. | Systems and methods for conveying multiple blood components to a recipient |
US8075468B2 (en) | 2008-02-27 | 2011-12-13 | Fenwal, Inc. | Systems and methods for mid-processing calculation of blood composition |
WO2013043315A1 (fr) * | 2011-09-22 | 2013-03-28 | Fenwal, Inc. | Système d'entraînement pour centrifugeuse |
EP2731725B1 (fr) * | 2011-09-22 | 2015-01-14 | Fenwal, Inc. | Système d'entraînement pour centrifugeuse |
EP2597153B1 (fr) | 2011-11-25 | 2016-10-05 | Miltenyi Biotec GmbH | Procédé de séparation de cellules |
US9101944B2 (en) | 2012-01-04 | 2015-08-11 | Fenwal, Inc. | Drive system for centrifuge |
WO2014028605A1 (fr) | 2012-08-15 | 2014-02-20 | Cyclone Medtech, Inc. | Systèmes et procédés de récupération de globules rouges pour autotransfusion |
US10099228B2 (en) | 2015-10-09 | 2018-10-16 | Invetech, Inc. | Apparatus for performing counter flow centrifugation and method of using same |
EP3666384B1 (fr) | 2018-12-10 | 2021-08-18 | Alfa Laval Corporate AB | Séparateur centrifuge et procédé d'élimination de verrous d'air dans un séparateur centrifuge |
CN109395894A (zh) * | 2018-12-14 | 2019-03-01 | 中国科学院沈阳自动化研究所 | 一种小型立式高速离心机 |
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US3586413A (en) * | 1969-03-25 | 1971-06-22 | Dale A Adams | Apparatus for providing energy communication between a moving and a stationary terminal |
US3737096A (en) * | 1971-12-23 | 1973-06-05 | Ibm | Blood processing control apparatus |
US4007871A (en) | 1975-11-13 | 1977-02-15 | International Business Machines Corporation | Centrifuge fluid container |
SE408859B (sv) * | 1977-08-03 | 1979-07-16 | Separex Sa | Anordning foer astadkommande av obegraensad likriktad relativ rotation mellan aendarna av ett tradformigt element |
US4164318A (en) * | 1977-10-12 | 1979-08-14 | Baxter Travenol Laboratories, Inc. | Centrifugal processing apparatus with reduced-load tubing |
DE2848953A1 (de) * | 1978-11-11 | 1980-05-22 | Heraeus Christ Gmbh | Trennzentrifuge |
DE2948177A1 (de) | 1979-11-30 | 1981-06-04 | Dr. Eduard Fresenius Chemisch-Pharmazeutische Industrie Kg Apparatebau Kg, 6380 Bad Homburg | Separator fuer eine ultrazentrifuge |
EP0111492A1 (fr) * | 1982-06-09 | 1984-06-27 | Beckman Instruments, Inc. | Assemblage d'attache d'un rotor de centrifugeuse |
DE3242541A1 (de) * | 1982-11-18 | 1984-05-24 | Fresenius AG, 6380 Bad Homburg | Zentrifuge |
US4439178A (en) * | 1982-12-30 | 1984-03-27 | International Business Machines Corporation | Sealless centrifuge processing channel and tube system |
SE454413B (sv) * | 1986-09-12 | 1988-05-02 | Alfa Laval Separation Ab | Centrifugalseparator med en rotor, vari ett bojligt organ strecker sig ett stycke lengs rotorns omkrets |
SE458342B (sv) * | 1987-07-06 | 1989-03-20 | Alfa Laval Ab | Centrifugalseparator innefattande en rotor med en separeringskammare bestaaende av tvaa avdelningar |
IT1251147B (it) * | 1991-08-05 | 1995-05-04 | Ivo Panzani | Tubo multilume per separatore centrifugo particolarmente per sangue |
DE4220232A1 (de) * | 1992-06-20 | 1993-12-23 | Fresenius Ag | Zentrifuge |
DE19803534C2 (de) * | 1998-01-30 | 1999-11-11 | Fresenius Ag | Zentrifuge und Leitung zum Zuführen und/oder Abführen mindestens eines Fluids von der Separationseinheit einer Zentrifuge zu einer ortsfesten Anschlußstelle |
EP1043071A1 (fr) | 1999-04-09 | 2000-10-11 | Jean-Denis Rochat | Appareil de cetrifugation de liquide et utillisation de cet appareil |
-
1999
- 1999-04-09 EP EP99810294A patent/EP1043071A1/fr not_active Withdrawn
-
2000
- 2000-04-07 WO PCT/IB2000/000436 patent/WO2000061294A1/fr active IP Right Grant
- 2000-04-07 US US09/958,468 patent/US6709377B1/en not_active Expired - Lifetime
- 2000-04-07 EP EP00912863A patent/EP1171242B1/fr not_active Expired - Lifetime
- 2000-04-07 JP JP2000610615A patent/JP4463997B2/ja not_active Expired - Fee Related
- 2000-04-07 DE DE60003656T patent/DE60003656T2/de not_active Expired - Lifetime
- 2000-04-07 AU AU34504/00A patent/AU3450400A/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
EP1171242A1 (fr) | 2002-01-16 |
AU3450400A (en) | 2000-11-14 |
JP4463997B2 (ja) | 2010-05-19 |
US6709377B1 (en) | 2004-03-23 |
DE60003656T2 (de) | 2004-07-29 |
DE60003656D1 (de) | 2003-08-07 |
JP2002541467A (ja) | 2002-12-03 |
EP1043071A1 (fr) | 2000-10-11 |
WO2000061294A1 (fr) | 2000-10-19 |
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