Which device is explicitly described as a PCV calculation tool?

Which device is explicitly described as a PCV calculation tool?

• A. PCV card reader
• B. Hematocrit tubes
• C. Hemocytometer
• D. Standard WBC counting device

Answer: (A)

Packed cell volume (PCV) is the percentage of a blood sample that is made up of red blood cells. You determine it by centrifuging a hematocrit tube to separate plasma from cells and then reading the length of the red cell column relative to the total column. The device described as a PCV calculation tool is the PCV card reader because it is specifically designed to convert that measurement into a PCV percentage. While hematocrit tubes are essential for holding and forming the packed cells, they do not perform calculation themselves. A hemocytometer is used to count cells in a known volume, not to calculate the PCV, and a standard WBC counting device is for white blood cell counts, not for PCV.

Packed cell volume (PCV) is the percentage of a blood sample that is made up of red blood cells. You determine it by centrifuging a hematocrit tube to separate plasma from cells and then reading the length of the red cell column relative to the total column. The device described as a PCV calculation tool is the PCV card reader because it is specifically designed to convert that measurement into a PCV percentage. While hematocrit tubes are essential for holding and forming the packed cells, they do not perform calculation themselves. A hemocytometer is used to count cells in a known volume, not to calculate the PCV, and a standard WBC counting device is for white blood cell counts, not for PCV.