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Definitions from WordNet

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Pheresis

Noun:

1. A procedure in which blood is drawn from a donor and separated into its components before being returned to the patient.

Example sentence: During his treatment, the patient underwent regular pheresis sessions to remove harmful antibodies from his blood.

Noun:

2. The process of removing a specific component from blood, such as platelets, plasma, or white blood cells.

Example sentence: Pheresis is often used to collect platelets for patients with low platelet counts.

Verb:

1. To perform a pheresis procedure on someone.

Example sentence: The medical team decided to pheresis the patient to eliminate excess white blood cells.