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White Blood Cell Depletion (WBCD) and Platelet Depletion (PLTD) Procedures
192
Spectra Optia Apheresis System Operator’s Manual
Addressing Clumping in the Connector
Clumping can affect collection efficiency by interfering with the separation in the connector. The potential for
platelet clumping is difficult to predict, since it does not always correlate with the patient’s platelet count. If you see
platelet clumping in the connector, perform the following steps:
1
Decrease the inlet:AC ratio to 8:1 until the clump disappears and until the system has processed at least
100 mL of inlet volume.
2
Check the connector for clumping and then perform one of the following steps:
• If the clumping is resolved, consider increasing the inlet:AC ratio to 10:1. Allow the system to process
500 mL to 1000 mL of inlet volume before you consider increasing the ratio again. Do not increase the
ratio by more than 2.0 for every 500 mL to 1,000 mL of inlet volume processed.
• If the clumping persists, leave the inlet:AC ratio at 8:1 until the clumping disappears or for the remainder
of the run. Some clumps may become clots that are difficult to eliminate. Maintaining the ratio at 8:1 will
help minimize the impact on the collection efficiency.
For additional information about anticoagulation in the tubing set, see “Managing Anticoagulation of the
Extracorporeal Circuit” on page 221.
SpectraOptiaOpsManual.book Page 192 Thursday, May 17, 2018 11:24 AM