This article is about the medical term. A scientist or lab technician performs the requested testing and provides the requesting medical professional with the results of the CBC. Blood counts of various types full blood count interpretation pdf been used for clinical purposes since the 19th century. Automated equipment to carry out complete blood counts was developed in the 1950s and 1960s.
In such cases, the person should have only one blood count for the day, and the transfusion of red blood cells or platelets should be planned based on that. More sophisticated modern analyzers can provide extended differential counts, which include hematopoietic progenitor cells, immature granulocytes, and erythroblasts. This instrument has flow cells, photometers and apertures that analyze different elements in the blood. The cell counting component counts the numbers and types of different cells within the blood. The results are printed out or sent to a computer for review. Blood counting machines aspirate a very small amount of the specimen through narrow tubing followed by an aperture and a laser flow cell.
Other instruments measure different characteristics of the cells to categorize them. Because an automated cell counter samples and counts so many cells, the results are very precise. However, certain abnormal cells in the blood may not be identified correctly, requiring manual review of the instrument’s results and identification of any abnormal cells the instrument could not categorize. If the red cells are smaller or larger than normal, or if there is a lot of variation in the size of the red cells, this data can help guide the direction of further testing and expedite the diagnostic process so patients can get the treatment they need quickly. This shows the view through the microscope of the specialized hemocytometer slide. The built-in grid simplifies counting cells by helping the technician keep track of which cells have already been counted.