摘要:
A centrifugal method, and corresponding system, for processing blood to collect platelet rich plasma. A separation chamber is filled with blood from a fill syringe by rotating the separation chamber at fill rotation rate and pumping the blood from the fill syringe. A soft spin is used to initially separate red blood cells from platelets by spinning the separation chamber at a soft spin rate. A percentage of the blood is drawn from the separation chamber back into the fill syringe to remove separated red blood cells. A second portion of the separated blood is drawn from the separation chamber until a red blood cell/platelet interface is detected. A hard spin is performed by spinning the separation chamber at a higher rate and connecting tubing is cleared of red blood cells by drawing a predetermined clearing volume. The platelet rich plasma is then collected in the collection syringe.
摘要:
A system for automatically processing blood components is described. The system includes a console, which contains all motors, pumps, sensors, valves and control circuitry, and a unique disposable set that includes a cassette supporting a centrifuge with an improved design, pump interfaces with an improved design, component and solution bags, and tubing. Various processes are implemented using a specific disposable set for each process which allows automatic identification of the process to be performed the console.
摘要:
A centrifuge (10) is provided with a cantilevered shaft (18) upon which the main drive rotor (26) is located. A bobbin (62) is attached to the planetary gear shaft (44), which is driven in planetary motion by the rotation of the rotor (26) and its toothed engagement with the shaft (18) of the cantilevered rotor . A flying lead section (72) extends from the bobbin (62) through an aperture in the cantilevered rotor (26). The arrangement provides a centrifuge structure which can handle higher rotational speeds while maintaining resolution. The flying lead section (72) provides a simple path for the inlet and outlet leads (84,86) which reduces dead volume and increases reliability. The bobbin (62) supports at least one coil (68). Rotor component (44) includes at least one bearing (50, 52). Attachment means (66) are provided removably to attach the bobbin (62) to the rotor component (44), the attachment means (66) enabling removal of the bobbin (62) from the rotor without removal of the or any bearing (50, 52) of the rotor component (44).
摘要:
The present invention is directed to a method and system that separates first particles from second particles, or white blood cells from red blood cells, by sedimentation in a fluid chamber with debulking of one of the first or second particles or red blood cells through the inlet of the fluid chamber. The method and system further includes fractionation of the remaining particles or white blood cells into selected subsets. In one embodiment of the instant invention a blood product containing white blood cells is loaded in a separation chamber, a diluting or sedimenting agent is added to encourage rouleaux formation of any red blood cells, the cells are sedimented and the red blood cells are removed.
摘要:
Es wird ein Verfahren zur Abtrennung von Blutplasmapartikeln von der flüssigen Phase einer Blutplasmasuspension, wie sie typischerweise in der Fraktionierung von Human-Blutplasma vorkommt beschrieben unter Verwendung einer selbstaustragenden Zentrifuge.
摘要:
A flexible, disposable centrifuge bag (226) for receiving and holding a fluid sample, comprising one or more tubes (248, 250) and upper and lower flexible sheets (234, 236) having doughnut shaped configurations. The upper and lower sheets are superimposed and completely sealed together at their outer perimeters (238) to define an outer perimeter (240) of the centrifuge bag. The inner perimeter of the bag defines a central core (242). The tubes are sandwiched between the upper and lower sheets and extend from the central core of the centrifuge bag. The upper and lower sheets are sealed together at their inner perimeters such that the tubes are sealed between said upper and lower sheets at the inner perimeter. The bag may be used to harvest platelet rich plasma from whole blood in either a batch method or while simultaneously infusing additional aliquots of whole blood into the bag during centrifugation.
摘要:
A belt-driven blood centrifuge (20) with side-mounted drive motor (24) for rotating the centrifuge at a rotation speed selected to separate blood components. The centrifuge includes a drive shaft assembly (28) rotated at an input rotation speed and a rotor assembly (200) rotatably linked to the drive shaft assembly rotated at an output rotation speed twice the input rotational speed. A drive motor is provided with a drive pulley to drive a belt (26), a chain, and the like to provide the motive force to rotate the drive shaft at the input rotation speed. In one embodiment, a belt is provided to contact both the pulley of the drive motor and an outer surface of a rotatable shell (32) of the drive shaft assembly. A base (12) is included in the centrifuge upon which the drive shaft assembly is mounted. The drive motor is positioned adjacent the drive shaft assembly and mounted on the base.
摘要:
Centrifugal clarifier (10) with pre-sterilized disposable container (70) contained within separation chamber (60) is disclosed. More particularly, the centrifugal clarifier (10) comprises a feed port which allows a liquid-solid mixture to be continuously fed into the clarifier (10) wherein the solid is sediment by rotation of the separation chamber and the clarified liquid is released into an outside receptacle through an effluent port. The throughput rate of the clarifier (10) is adjustable and can be determined by as a function of the fill radius of the separation chamber (60).
摘要:
Blood processing systems and methods separate blood into constituents including a plasma constituent that includes a platelet volume. The systems and methods detect the optical density of the plasma constituent and generate a first output indicative of the optical density. A processing element integrates the first output relative to the volume of plasma constituent and generates an integrated output. The integrated output correlates to the platelet volume. A second processing element (324) generates an output based, at least in part, upon the integrated output, which depicts a value indicating a blood volume that needs to be processed to obtain a desired platelet volume.
摘要:
A blood separation chamber (18) is provided for rotation about an axis. In one implementation, the blood separation chamber (18) comprises a base (388) that includes formed walls that define a hub (120). A separation channel (126) extends about the hub (120). Flow passages (142, 144, 146) extend between the hub (120) and the separation channel (126). The hub (120) enables attachment of external tubing to convey blood to and from the separation channel (126) through the hub (120). In another implementation, the chamber (18) includes an interior channel, which includes a recess (386) that extends outside the bounds of the walls establishing separation zone. The recessed interior channel (386) permits the yields of individual blood components separated in the chamber to be maximized without cross-contamination or contamination by other components present in the chamber (18).