Liquid purification or separation – Processes – Including controlling process in response to a sensed condition
Reexamination Certificate
2006-01-03
2006-01-03
Drodge, Joseph (Department: 1723)
Liquid purification or separation
Processes
Including controlling process in response to a sensed condition
C210S085000, C210S143000, C210S787000, C494S001000, C494S010000, C494S037000, C494S043000, C604S005010, C604S065000
Reexamination Certificate
active
06982038
ABSTRACT:
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 a 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.
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Berg Gary L.
Dolecek Victor D.
Malcolm David
McIntosh Kevin D.
Merte Kenneth E.
Berry Tom
Drodge Joseph
Hohenshell Jeff
Medtronic Inc.
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