EP0305397A1 - Annular centrifuge - Google Patents
Annular centrifugeInfo
- Publication number
- EP0305397A1 EP0305397A1 EP87903462A EP87903462A EP0305397A1 EP 0305397 A1 EP0305397 A1 EP 0305397A1 EP 87903462 A EP87903462 A EP 87903462A EP 87903462 A EP87903462 A EP 87903462A EP 0305397 A1 EP0305397 A1 EP 0305397A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- centrifuge
- compartment
- annular
- container
- separation
- 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.)
- Ceased
Links
Classifications
-
- 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
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
- A61M1/3693—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits using separation based on different densities of components, e.g. centrifuging
-
- 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
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
- A61M1/30—Single needle dialysis ; Reciprocating systems, alternately withdrawing blood from and returning it to the patient, e.g. single-lumen-needle dialysis or single needle systems for hemofiltration or pheresis
- A61M1/301—Details
- A61M1/304—Treatment chamber used as reservoir, e.g. centrifuge bowl or filter with movable membrane
-
- 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
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
- A61M1/3693—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits using separation based on different densities of components, e.g. centrifuging
- A61M1/3698—Expressing processed fluid out from the turning rotor using another fluid compressing the treatment chamber; Variable volume rotors
-
- 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
- B04B5/0407—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers for liquids contained in receptacles
- B04B5/0428—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers for liquids contained in receptacles with flexible receptacles
-
- 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
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/02—Blood transfusion apparatus
- A61M1/025—Means for agitating or shaking blood containers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4022—Concentrating samples by thermal techniques; Phase changes
- G01N2001/4027—Concentrating samples by thermal techniques; Phase changes evaporation leaving a concentrated sample
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N2035/00465—Separating and mixing arrangements
- G01N2035/00495—Centrifuges
Definitions
- liquids also include suspensions and highly viscous materials, such as blood cells obtained from whole blood after the plasma has been separated.
- the invention is particularly suitable for carrying out plasmapheresis, which is the harvesting of a certain amount of plasma from a blood donor without causing damage to or loss of blood cells, it being essential to do this as quickly and economically as possible and in satisfactory safety conditions.
- plasmapheresis is the harvesting of a certain amount of plasma from a blood donor without causing damage to or loss of blood cells, it being essential to do this as quickly and economically as possible and in satisfactory safety conditions.
- An object of the present invention is to provide a centrifuge apparatus for gentle and efficient separation of liquids, especially blood and other biological liquids, in which the afore-mentioned disadvantages of known types of centrifuges are eliminated. Accordingly, the centrifuge apparatus according to the invention comprises a simple and reliable system for transferring a separated component from an annular container to a component container while the liquid is being subjected to the centrifugal field of the centrifuge, without any manually or exteriorly con ⁇ trolled steps influencing the operation of the centrifuge being required.
- a further object of the present invention is to provide simple, reliable and easy-to-handle plasmapheresis equipment suitable for use in mobile donation units, such as blood buses.
- the pressure medium compartment is annular and the pressure medium is an annular elastic body disposed in this compartment and communicating with the separation compartment through an annular opening between the two compartments.
- the commu ⁇ nication may take place through the intermediary of an annular diaphragm disposed in this opening.
- the component container or containers are positioned in a central compartment in the central portion of the centrifuge head and, accordingly, also rotate. Rotary connectors in the pathway between the annular container _ and the component container or containers can thus be dispensed with.
- the separation compartment and the central compartment communicate with one another through a slot-like connect ⁇ ing zone.
- This feature permits the use of practical bag assemblies in which the annular container and the compo- nent container or containers are interconnected and are handled as a unit.
- the centrifuge may be equipped with a system for filling and emptying the annular container while it is positioned in the centrifuge head.
- the separation compartment is pressurized or subjected to vacuum through an air pressure or vacuum connection on the centrifuge head.
- the centrifuge motor may be operated to effect a reciprocatory agitating movement.
- the filling step may also be discontinued automatically by causing the annular container, when it has received a predetermined volume, to block the vacuum connection.
- the elastic body may be adapted to exert pressure on the annular container whenever the centrifuge head is rotating.
- the transfer of a separated component to the component container is governed by one or more valves which control the communication between the annular container and the component container. Normally, the valves block the communication, and they open it when transfer is to be effected.
- the valves may be centrifugal- ly controlled and set to open at a given rotational speed which is higher than the normal operating speed.
- valves and their opening and closing characteristics may be adapted for the intended use of the centrifuge.
- pinch valves which squeeze collapsible connecting ducts between the containers.
- the containers may be interconnected to form a closed system so as to communi- cate with one another without exposing their contents to the ambient atmosphere.
- Fig. 1 shows one embodiment of a centrifuge. head for a centrifuge apparatus according to the invention
- Fig. 2 is a plan view of the centrifuge head with the cover removed;
- FIG. 3 shows a centrifugally controlled pinch valve for a centrifuge head according to the invention
- Fig. 4 shows a valve device for a centrifuge head according to the invention, the valve device being in the form of an annular pinch member;
- Fig. 5 shows an interlocking and agitating device for a centrifuge head according to the invention
- Fig. 6 shows an alternative embodiment of the pressure medium compartment and the elastic body in a centrifuge head according to the invention.
- the inner edge of the diaphragm 8 is clamped between rotationally symmetrical parts 9 and 10, part 10 being clamped to the bowl 6 by means of a number of screws 11.
- Bowl 6, in turn, is clamped to the hub 5 by a number of screws 12.
- the space between parts 6, 8 and 9 forms an annular pressure medium compartment 13 which is occupied by an elastic body 14 consisting of, for example, latex rubber mixed with metal powder.
- the elastic body has to have substantially greater density than the liquid to be separated in the centrifuge. This can be accomplished by, in addition to admixture of metal powder and other solid materials, inserts 49, 57 (Figs. 5 and 6) of metal, for example, in the portion of the body closest to the centre of rotation.
- Numeral 15 designates a transparent cover of the centrifuge head which is readily removable because it is held by a snap ring 16.
- the ring 16 par ⁇ tially engages a groove in the ring 7 and partially remains in a relatively deep groove in the part 15 so that it holds these parts together.
- the ends 17 of the ring 16 are turned up from the body of the ring and extend through an opening in part 15 and beyond that part so that they can be gripped. By pressing the ends 17 together the diameter of the ring is decreased so that the ring and part 15 can be fitted into the ring 7 and locked to it when the ends 17 are released.
- An 0-ring 18 provides a seal between parts 7 and 15.
- a sealing screw 19 provided with an O-ring prevents any liquid coming out into the centrifuge head from escaping into the lower portions of the head.
- a flexible collapsible annular container 20 communi ⁇ cates with a component container 21 by way of a collaps ⁇ ible connecting duct 22.
- the annular container 20 is intended to receive a batch of liquid to be centrifuged, such as a blood donation, and the component container 21 is intended to collect a lighter component, such as plasma, separated through the centrifugation.
- the annular container 20 is somewhat excentric, having its greatest radial dimension at the connecting duct 22, to prevent a heavier component from being drawn into the component container while the annular container still holds a quantity of the lighter component.
- Numerals 23-25 designate a centrifugally controlled pinch valve.
- it consists of a rubber rope 24 which urges the collapsible connecting duct 22 against a shoulder 23.
- the annular container and the component container are positioned in the centrifuge so that the collapsible connecting duct 22 is positioned over the shoulder 23.
- the tension of the rubber rope is selected such that the rope is lifted from the duct 22 by the centrifugal force to open the duct only when the speed of the centrifuge exceeds the predetermined separation speed.
- Two photocells 26 and 27 indicate and signal to the programme control if blood or plasma, for example, is in their light path.
- the interior of the centrifuge communicates with the atmosphere outside the centrifuge head through a passage
- the separation compartment may be subjected to overpressure or vacuum when the annular container is emptied and filled.
- a flexible tube 30 the annular container can be linked with a container, blood donor or the like outside the centrifuge by way of a connector 32.
- a sealing member 31 fixedly secured to the tube 30 seals the inte ⁇ rior of the centrifuge from the exterior (disregarding the constriction 28 and the connection 29) when it is pulled into a firmly seated position in the cover 15 using the pull rope 33.
- the centrifuge apparatus according to the invention has many different applications. However, it is particu ⁇ larly suitable for separation of blood, and in particular for separation of blood immediately following the with ⁇ drawal of blood from a blood donor or a patient.
- the cover 15 is brought in position and secured by means of the ring 16 as described above.
- the annular container 20 has been primed with a suitable quantity of anticoagulant.
- the connector 32 is attached to a standard blood donation kit which is also linked with the blood donor. Because the centrifuge is positioned at a comfortable working height, the hydrostatic negative pressure from the donor to the container is insufficient for normal withdrawal of blood.
- a vacuum pump (not shown) connected to the passage 29 provides, by virtue of the constriction 28, the desired increased vacuum. Blood flows from the donor into the annular container 20.
- the centrifuge is programmed to oscillate at a predetermined amplitude and a predetermined frequency during this phase.
- the annular container 20 As the annular container 20 is becoming filled with blood, its upper wall approaches the underside of the cover 15. When the container has been filled, the flexible annular container closes the passage-29, and the vacuum produced by the vacuum pump increases because the constriction 28 is blocked. Attention is then called to the attendant and the withdrawal of blood is discontinued.
- the blood donation kit is separated from the connector 32, and the blood donor in the customary manner is supplied with saline to replace the donated blood and to keep the blood withdrawal tubes clean. Initially, the centrifuge operates at the normal separation speed, the duct 22 then being maintained in closed condition. Because the elastic body 14 has greater density than the blood and extends farther towards the centre than the blood, the overpressure generated in the container 20 is substantially higher than the overpressure generated by the blood.
- the centrifuge speed is slightly increased, so that the centrifugal force lifts the rubber rope 24 from the duct 22 which is accordingly opened to permit the separated plasma to flow to the component container 21.
- the radial height- of the column of blood then becomes greater that that of the rubber, but because of the greater pressure action of the rubber, plasma continues to flow into the container 21.
- Plasma is still being separated from the cells, however, although at a reduced rate, and when the plasma reaches the light path of the photocell 26, the centrifuge speed is again increase so that the valve 23-25 is opened and a further quantity of plasma is conveyed into the component containe ⁇ 21.
- the provision of two photocells permits slow transfer of plasma while the separation is still going on, resulting in saving of time.
- the centrifuge is stopped and the rubber body resumes its original shape, and because plasma has been expelled from the annular container 20, there is now space for a different liquid.
- Diluting liquid physiological saline
- the separation compartment 1 is subjected to a predeter ⁇ mined overpressure by pumping air into it by way of the passage 29.
- the contents of the annular container 20 then flow to the donor by way of an air-trapping vessel and a transfusion kit including a filter.
- the first phase of the two-cycle pheresis is completed when the annular container is empty.
- the cover 15 is removed and the duct 22 is sealed and cut, e.g. by means of a pair of heat-sealing jaws.
- the annular container and the component container are removed and replaced by a new container assembly for repetition of the above-described procedure.
- the component container 21 is large enough to accommodate two batches of plasma, and in such case both separations are made in the same container.
- the priming anticoagulant in the annular container has to be replaced by anticoagulant fed continuously by way of the blood donation kit, or the container assembly in the centrifuge has " to be heparin coated so that coagulation is avoided.
- the communication between the annular container and the component container may be provided by a flexible tube, and the centrifugally operated pinch valve 23-25 may be replaced by a tube pinch valve as shown in Fig. 3 or by an annular pinch member as shown in Fig. 4.
- the volume of elastic material in the body 14 may be reduced by pro ⁇ viding it with internal passages and weight segments, a metal braid or the like at -the portion closest to the centre to increase its pressure action on the annular container 20, as will be described with reference to Fig. 6.
- numeral 34 designates a flexible connecting tube between the annular container 20 and the component container 21.
- the tube pinch valve comprises a fixed support 35 and a fixed guide 36 which accommodates a slidable closing cylinder 37 having a chisel tip 38 engaging the flexible tube 34.
- a spring 39 urges the cylinder 37 towards the support 35 to pinch the flexible tube 34.
- the guide 36 extends radially, and when a pre ⁇ determined rotational speed is reached, the centrifugal force on the cylinder overcomes the spring force so that the valve opens.
- the valve may be provided on the cover of the centrifuge, and the flexible tube 34 may have a length such that it can be pulled into a central opening in the cover and positioned in the gap between the support 35 and the cylinder 37.
- valve arrangement is shown diagra atic- ally in Fig. 4.
- the valve comprises an annular pinch member 41 disposed in the cover of the centrifuge head within the slot-like zone between the separation compartment 20 and the central compartment 21.
- a groove 40 in the cover accommodates the annular pinch member 41.
- a number of springs 42 urge the pinch member downwardly to close the slot-like passage between the separation compartment and the central compartment.
- radial rods 43 are slidab ⁇ y received in slots 44 formed in the pinch member.
- a weight 45 forms a terminal end of the radially outwardly directed portions of the rods and rests on a radially inwardly directed spring or resilient body 46.
- the height profile of the rods 43 varies in a special fashion along the length of the rods.
- Buffy-coat is difficult to expel from the annular container into a component container by way of a valved tube and to be obtained in pure form, because it is viscous and constitutes only a relatively small volume of a blood batch.
- centrifuge head 51 and at the other end thereof is provided with a latch pin 53 which can be caused to engage a corresponding recess 54 in the centrifuge head.
- the cover portion 50 On its upper side the cover portion 50 is provided with a pin 55 which upon folding the cover portion upwardly to open position pushes the spring arm 52 such that the latch pin 53 is caused to engage the recess 54.
- the centrifuge head can then be turned only through a portion of a full turn and is returned to the original position by the spring arm 52.
- Momentary activation of centrifuge motor causes a reci ⁇ procating movement of the centrifuge head, resulting in an efficient agitation of the liquid in the annular container.
- agitation can be utilized during blood withdrawal to mix the incoming blood with anti-coagulant, such as CPD solution, in the annular container and to resuspend the cell concentrate in physiological saline during plasma ⁇ pheresis, or for washing processes, etc.
- the arrangement also constitutes a safety interlock which prevents inadver- tent rotation of the centrifuge head when flexible tubes are connected between containers in the centrifuge head and a blood donor, for example.
- the cover portion 50 always is open when such tubes are connected and the safety interlock accordingly is activated.
- Fig. 6 shows a cross-section through one half of a centrifuge head according to the invention in which the pressure medium compartment and the elastic body are partly modified in comparison with Figs. 1 and 5.
- annular elastic body 14 forms the entire bottom of the separation compart ⁇ ment 1 and also forms a thinner bottom portion 56 of the central compartment.
- a braid 57 of metal wire forms part of the elastic body.
- the metal braid extends along the radially inner annular portion of the body. It has great density and is extendable so that its circumference can be elongated, and it accordingly amplifies the pressure action of the body 14 against the separation compartment during the centrifugation.
- an annular body 58 filled with liquid is embedded in the elastic body.
- a liquid-filled tube may be cast into a silicon rubber body, for example.
- Numeral 59 designates the wall of such an embedded tube. Because of this design, the deformation energy stored in the body 14 is reduced and an increased pressure action is achieved at lower speed. The direction of the deforma ⁇ tion can be controlled and the deformation losses can be reduced by the positioning and design of the liquid-filled embedded body.
- annularly arranged metal segments 49 as shown in Fig. 5, or heavier solid material, such as granules of lead embedded in the elastic body.
- the granules may be uniformly distributed in the annular body 14 or concen ⁇ trated to the radially inner portion, that is, to an area where the metal braid is positioned in the illustrated embodiment.
Landscapes
- Health & Medical Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Veterinary Medicine (AREA)
- Animal Behavior & Ethology (AREA)
- Engineering & Computer Science (AREA)
- Public Health (AREA)
- Cardiology (AREA)
- Urology & Nephrology (AREA)
- Emergency Medicine (AREA)
- Centrifugal Separators (AREA)
- External Artificial Organs (AREA)
Abstract
L'appareil de centrifugation décrit est destiné à la séparation centrifuge discontinue d'un liquide, de préférence du sang et d'autre liquides biologiques. La séparation a lieu dans un récipient annulaire flexible déformable (20) relié à un ou plusieurs récipients de composants (21). Un compartiment de séparation annulaire (1) recevant le récipient annulaire flexible (20) est prévu dans l'appareil de centrifugation. De plus, l'appareil est pourvu d'un compartiment à milieu sous pression (13) communiquant avec le compartiment de séparation et contenant un corps élastique (14) adapté pour être comprimé lors de la centrifugation contre le compartiment de séparation par l'action du champ centrifuge et pour exercer une pression sur le récipient annulaire placé dans le compartiment de séparation. Un composant séparé est ainsi expulsé vers un récipient de composant (21) pendant la centrifugation. L'appareil de centrifugation est particulièrement approprié à une plasmaphérèse.The centrifuge device described is intended for the discontinuous centrifugal separation of a liquid, preferably blood and other biological liquids. The separation takes place in a deformable flexible annular container (20) connected to one or more component containers (21). An annular separation compartment (1) receiving the flexible annular container (20) is provided in the centrifuge apparatus. In addition, the apparatus is provided with a pressurized medium compartment (13) communicating with the separation compartment and containing an elastic body (14) adapted to be compressed during centrifugation against the separation compartment by the action. centrifugal field and to exert pressure on the annular container placed in the separation compartment. A separate component is thus expelled to a component container (21) during centrifugation. The centrifuge is particularly suitable for plasmapheresis.
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8602242A SE459791B (en) | 1986-05-16 | 1986-05-16 | centrifuge |
SE8602242 | 1986-05-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0305397A1 true EP0305397A1 (en) | 1989-03-08 |
Family
ID=20364556
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87903462A Ceased EP0305397A1 (en) | 1986-05-16 | 1987-05-13 | Annular centrifuge |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0305397A1 (en) |
JP (1) | JPH01502561A (en) |
AT (1) | ATE90575T1 (en) |
AU (1) | AU7400087A (en) |
SE (2) | SE459791B (en) |
WO (1) | WO1987006857A1 (en) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8621383D0 (en) * | 1986-09-04 | 1986-10-15 | Tecumed Wales Ltd | Centrifuges |
SE458342B (en) * | 1987-07-06 | 1989-03-20 | Alfa Laval Ab | CENTRIFUGAL SEPARATOR INCLUDING A ROTOR WITH A SEPARATION CHAMBER CONSISTING OF TWO DEPARTMENTS |
SE462015B (en) * | 1987-09-15 | 1990-04-30 | Omega Medicinteknik Ab | SETTING AND DEVICE CLEANING BLOOD CELLS |
SE9002255D0 (en) * | 1990-06-26 | 1990-06-26 | Eric Westberg | METHOD AND APPARATUS FOR THE PREPARATION OF BLOOD |
SE9302369D0 (en) * | 1993-07-08 | 1993-07-08 | Omega Medicinteknik Ab | PASS SYSTEM PROVIDED FOR CENTRIFUGAL SEPARATION WITH USE OF THIS PASS SYSTEM |
US5733253A (en) * | 1994-10-13 | 1998-03-31 | Transfusion Technologies Corporation | Fluid separation system |
SE9600713L (en) * | 1996-02-26 | 1997-10-17 | Omega Medicinteknik Ab | Method of separating cells, especially platelets and bag set therefor |
SE9700495D0 (en) * | 1997-02-12 | 1997-02-12 | Omega Medicinteknik Ab | Method and round bag system and centrifuge for blood treatment |
SE9701423D0 (en) * | 1997-04-16 | 1997-04-16 | Omega Medicinteknik Ab | Container set and device for blood separation |
US6027441A (en) * | 1997-07-01 | 2000-02-22 | Baxter International Inc. | Systems and methods providing a liquid-primed, single flow access chamber |
US5935051A (en) * | 1997-08-29 | 1999-08-10 | Beckman Instruments, Inc. | Blood separation device |
DE19841835C2 (en) * | 1998-09-12 | 2003-05-28 | Fresenius Ag | Centrifuge chamber for a cell separator |
SE516321C2 (en) | 1999-05-31 | 2001-12-17 | Gambro Inc | Centrifuge for the treatment of blood and blood components |
SE517032C2 (en) | 1999-10-26 | 2002-04-02 | Gambro Inc | Method and apparatus for treating blood and blood components |
CA2495644A1 (en) * | 2002-08-23 | 2004-03-04 | Gambro, Inc. | Methods and apparatuses for blood component separation |
ITMI20031715A1 (en) | 2003-09-05 | 2005-03-06 | Dideco Spa | CONTROL DEVICE IN THE DIFFERENTIATED COLLECTION OF THE |
US7060018B2 (en) | 2003-09-11 | 2006-06-13 | Cobe Cardiovascular, Inc. | Centrifuge apparatus for processing blood |
JP4533706B2 (en) * | 2004-09-01 | 2010-09-01 | 旭化成株式会社 | Filtration method and system |
WO2012012343A1 (en) | 2010-07-19 | 2012-01-26 | Caridianbct, Inc. | A centrifuge for processing blood and blood components |
EP2815776B1 (en) * | 2011-06-13 | 2016-02-03 | Terumo BCT, Inc. | System for blood separation with gravity valve for controlling a side-tapped separation chamber |
US9248446B2 (en) | 2013-02-18 | 2016-02-02 | Terumo Bct, Inc. | System for blood separation with a separation chamber having an internal gravity valve |
US10618060B2 (en) | 2013-12-20 | 2020-04-14 | Terumo Bct, Inc. | Centrifuge safety mechanism |
CA2957407C (en) | 2014-08-14 | 2020-06-30 | Terumo Bct, Inc. | Processing particles |
KR101926710B1 (en) * | 2016-07-19 | 2018-12-07 | 이준석 | Tube for centrifugation, and injection method for centrifugation |
US11964286B2 (en) | 2019-04-12 | 2024-04-23 | Terumo Bct, Inc. | Cell washing chamber for blood processing centrifuge |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3326458A (en) * | 1965-05-28 | 1967-06-20 | Harold T Meryman | Container and process of storing blood |
SE332906B (en) * | 1969-08-11 | 1971-02-22 | Aga Ab | |
US4304357A (en) * | 1980-06-16 | 1981-12-08 | Haemonetics Corporation | Blood processing centrifuge |
-
1986
- 1986-05-16 SE SE8602242A patent/SE459791B/en not_active IP Right Cessation
- 1986-12-18 SE SE8605456A patent/SE461192B/en not_active IP Right Cessation
-
1987
- 1987-05-13 EP EP87903462A patent/EP0305397A1/en not_active Ceased
- 1987-05-13 JP JP62503059A patent/JPH01502561A/en active Pending
- 1987-05-13 AT AT87903463T patent/ATE90575T1/en active
- 1987-05-13 AU AU74000/87A patent/AU7400087A/en not_active Abandoned
- 1987-05-13 WO PCT/SE1987/000239 patent/WO1987006857A1/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO8706857A1 * |
Also Published As
Publication number | Publication date |
---|---|
SE8605456L (en) | 1987-11-17 |
SE8602242D0 (en) | 1986-05-16 |
ATE90575T1 (en) | 1993-07-15 |
AU7400087A (en) | 1987-12-01 |
WO1987006857A1 (en) | 1987-11-19 |
SE8605456D0 (en) | 1986-12-18 |
SE8602242L (en) | 1987-11-17 |
SE461192B (en) | 1990-01-22 |
SE459791B (en) | 1989-08-07 |
JPH01502561A (en) | 1989-09-07 |
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