Abstract:
An apparatus and method are provided for separating components of a fluid or particles. A separation vessel (28) having a barrier dam (62) is provided to initially separate intermediate density components of a fluid, and a fluid chamber (30) is provided to further separate these intermediate density components by forming an elutriative field or saturated fluidized particle bed. The separation vessel includes a shield (96) for limiting flow into the fluid chamber of relatively high density substances, such as red blood cells. The separation vessel also includes a trap dam (70) with a smooth, gradually sloped downstream section (104) for reducing mixing of substances. Structure is also provided for adding additional plasma to platelets and plasma flowing from the fluid chamber. The system reduces clumping of platelets by limiting contact between the platelets and walls of the separation vessel.
Abstract:
A centrifuge rotor including a sample carrier (1) enclosed within an outer housing (7, 8) and being rotatable about a principal axis of rotation of the rotor, the sample carrier (1) having a peripheral zone for holding sample tubes (6) in an orientation parallel to the said axis when at rest and the sample carrier being capable of deflecting to enable sample tubes (6) to swing out under the effect of centrifugal force. The swinging out of the tubes (6) is constrained and controlled by the arrangement of the sample carrier (1) and contact between the tubes (6) and outer housing (7, 8).
Abstract:
A centrifugal evaporator, in which inclined sample tubes (61) supported in a holder (62) are rotatably mounted on a rotor (64), within a vacuum chamber (76), has a rotatable drive shaft (63) connected to the holder. Drive to the shaft (63) is via a spindle (70) passing up through the centre of a main drive shaft (71) and connected by bevel gears (67), (69) to the shaft (63). In operation, the relatively slow rotation of the holder (62) mounted on the shaft (63), in combination with rotation about the main shaft (71), causes the liquid sample in each tube (61) to be swept around the inside walls of the tube to simulate a vortex, thereby increasing the exposed surface area and improving evaporation. In an alternative arrangement the holder is pivoted relative to the rotor, so that the liquid sample is alternatively slushed from one side wall to the other.
Abstract:
A system for separating biological fluids into components, comprises a set of containers (40, 42-44) for the biological fluid to be separated and the separated components, optionally an additional container (41) for additive solution, and a hollow centrifugal processing chamber (20) having an axial inlet/outlet (7) for the biological fluid. The processing chamber contains a piston (21) movable to intake a selected quantity of biological fluid and express processed biological fluid components via the outlet. Optical means (60-69) monitor the position of piston (21) to control the amount of intaken fluid and the expression of components. A distribution valve arrangement (45-48) selectively communicates the processing chamber (20) and the containers (40-44) or places them out of communication. The system is arranged to operate in a separation mode and in a non-separation transfer mode, especially for adding preservative solution to separated blood stem cells. In the separation mode, fluids are intaken into processing chamber (20), centrifuged and separated into components, and the components expressed possibly through the use of a density gradient product. In the transfer mode, the processing chamber (20) intakes and expresses fluid with the chamber stationary, the valve actuation arrangement (45-48) transferring fluid from one container (40-44) to another via the processing chamber (20), by movement of the piston (21), without centrifugation or separation, and the means (60-69) for monitoring the piston's position controls the amounts of non-separated fluids transferred.
Abstract:
Centrifuge apparatus comprises a rotor (20) having an axis of rotation (22) and a sample holder (24), the longitudinal axis (28) of the sample holder being oriented to extend along a chord of a circle defined by the rotational path of the perimeter of the rotor, the chord being spaced from the axis of rotation by as great a distance as possible. The sample holder may be fixed relative to rotor, but is preferably movable during operation of the apparatus such that the angle between the centrifugal force direction and the longitudinal axis may be varied in a predetermined manner whilst the apparatus is operating at effective centrifugation speeds, said angle being controlled by a biassing mechanism (32). A similar biassing mechanism may also be applied to an otherwise conventional "swinging-bucket" type centrifuge. The apparatus provides improved speed and uniformity of centrifugation.
Abstract:
The instant invention relates to a method and the apparatus for collecting a hyperconcentrated platelet product. A fluid containing platelets and other particles flows into a fluid chamber at a flow rate. The flow rate of the fluid is selected to retain the majority of the platelets in the fluid chamber in a saturated bed. The platelets are collected from the fluid chamber without collecting the other particles to form a hyperconcentrated other particle reduced platelet product.
Abstract:
A system and method are disclosed for separating particles having different sedimentation velocities. The system includes a fluid chamber for separating the particles from one another. Conduits are provided for flowing liquid carrying particles to the fluid chamber and for mixing the liquid with a diluting liquid. Structure is also provided for separating particles from the liquids after the particles are separated in the fluid chamber. The disclosed methods include forming a saturated fluidized bed of first particles to retain second particles in the fluid chamber. A diluting liquid having a density less than that of the particles is mixed with the liquid carrying particles to reduce overall density of substances in the fluid chamber and thereby reduce Coriolis jetting of liquids in the fluid chamber.
Abstract:
In a centrifugal evaporator for evaporating a mixture of liquids having different volatilities and specific gravities, the mixture being contained in a test tube (14) pivotally mounted on a rotatable support arm (12) in a sealable vacuum chamber (16), the support arm is rotated up to a speed of the order of 2000 rpm before evaporation of the more volatile component occurs, and only then is the chamber progressively evacuated. The motor is preferably a three-phase induction motor connected to the electric supply in a frequency convertor.
Abstract:
The present invention is a method or an apparatus for interactively processing biological cells maintained in a sterile environment. Furthermore, the invention provides a superior system for enzymatically converting red blood cells of groups A, B, or AB to group O. A system (10) for interactively processing biological cells maintained in a sterile environment includes a supply module (20), a cell module (12), a processing module (60), at set of conduits, a plurality of valves, a plurality of sensors and a control module (80). The supply module is constructed and arranged to provide selected amounts of process chemicals. The cell module includes a cell sensor for measuring the amount of the biological cells supplied for processing to the processing module. The processing module is constructed and arranged to process said biological cells. Several conduits connect the supply module, the cell module and the processing module in a sterile manner, and the valves control transfer of the biological cells and the process chemicals between the modules. The sensors are constructed and arranged to detect the transfer of the biological cells and the process chemicals in the conduits. The control module is operatively connected to the valves, the sensors and the processing module. The control module also receives data from the cells sensor and controls the transfer and the processing of the biological cells based on the cell sensor data. The system can adjust the processing algorithm based on the type of the processed cells or the cell amount provided for processing.
Abstract:
Systems and methods rotate a chamber (14), in which whole blood is centrifugally separated into an interface between the packed red blood cells and the plasma constituent. The interface carries platelets and mononuclear cells. The systems and methods include an interface control unit which is operative in a first state to enable removal of platelet-poor plasma (PPP) in a first container for use as a diluting liquid, and in a second state, to retain mononuclear cells (MNC) in the chamber (14), while removing platelet-rich plasma (PRP) from the chamber (14), bypassing the platelet-poor collection container, thereby maintaining its platelet-poor character, and in a third state to enable the removal of mononuclear cells (MNC) from the chamber (14) in a path (T13) that leads to a second container, where the mononuclear cells are collected.