As the blood is separated, the heavier reds cells sink to the bottom and are given back to you. The liquid plasma rises and in between these two components is a layer of platelets that are tracked into a small pouch wrapped around the cylinder of the centrifuge. When you give blood, it triggers your spleen to flood your blood stream with stored platelets to try and stop the bleeding. Thus, more plasma and platelets are collected and you are able to donate one, two or potentially three doses of platelets during one visit.
Meanwhile, your healthy bone marrow immediately begins converting more stem cells into platelets to replace those that have been donated.
Platelet donors can give a larger quantity and, since the donation comes from a single donor, better quality of platelets to help patients in their battle to live. Platelet donations are given primarily in the donor centers. You can donate platelets every 7 days up to 24 times a year.
A dose of whole donor blood is placed in a large centrifuge and is spun for a preset time usually about 15 minutes at a preset speed. The red blood cells precipitate to the bottom of the bag, with the platelets above them, then the white blood cells and the plasma at the very top. The plasma and red blood cells are collected into different bags under optical supervision using a device called the separator.
The platelets and white blood cells remain in the original bag. Blood separation takes place in the middle of the tube bottom enabling easy separation of the phases.
On a fixed-angle rotor, the blood separation occurs with high centrifugal forces. This type of rotor is usually used in research laboratories. Blood separation can be done quicker on a fixed-angle rotor compared to a swing-out rotor. Blood separation Blood separation is one of the crucial processes in a clinical lab and is usually conducted via a process called centrifugation.
Blood plasma separation Blood cells are suspended in a yellowish substance called plasma, consisting of proteins, glucose, clotting factors, hormones, and carbon dioxide. The purpose of blood cell separation The common purpose of blood separation is testing the various blood components acc. Issue 6, From the journal: Journal of Materials Chemistry. You have access to this article. Please wait while we load your content Something went wrong. Try again? Cited by. Download options Please wait Supplementary information PDF 85K.
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