Centrifugal liquid processing system
Method and apparatus for separating whole blood into its components and for automatically collecting one component
Pressure cuff draw mode enhancement system and method for a single needle blood fractionation system
Method of separating blood components
Blood separation system
Bottom blood bag separation system
Centrifuge drum for concentrating suspended solids
Method and apparatus for the separation of blood into its components
ApplicationNo. 185487 filed on 01/21/1994
US Classes:494/1, WITH CONDITION RESPONSIVE MEANS494/10, WITH MEANS FOR INDICATING, INSPECTING, MEASURING, SIGNALING OR TESTING604/6.04Plasma
ExaminersPrimary: Scherbel, David A.
Assistant: Till, Terrence R.
Attorney, Agent or Firm
Foreign Patent References
International ClassesB04B 009/10
AbstractA plasma sequestration system having a volume control system is provided. When a calculated volume of whole blood has been processed, the system switches from a fill to an empty cycle. The termination point is calculated in advance, based on the desired composition of the collected plasma, thus improving process control and product uniformity. The system is automated or partially automated using an optical sensor or marker to monitor the volume of packed red blood cells. When the red cells reach the marker or sensor, a signal is sent to the control system which then calculates the required fill volume. Processing continues until the calculated fill volume is reached, at which time the system automatically stops the collection cycle. The system also provides for two speed operation of the centrifuge as a safeguard against foaming which may result in aerosol formation and blood trauma. Foaming is reduced by reducing centrifuge speed as the packed red blood cells approach the stationary deflector in the centrifuge bowl.
Field of SearchIncluding centrifuge
Utilizing a centrifuge or compartmented rotor
Liberation or purification of sample or separation of material from a sample (e.g., filtering, centrifuging, etc.)
WITH CONDITION RESPONSIVE MEANS
WITH MEANS FOR INDICATING, INSPECTING, MEASURING, SIGNALING OR TESTING
INCLUDING PLURALITY OF MINIATURE BOWLS (E.G., TEST TUBES) DISTRUBUTED ABOUT ROTATABLE CARRIER AND READILY REMOVABLE THEREFROM
Including conduit of flexible umbilical cable type
Comprising flexible bowls embraced by pockets provided therefor in carrier