Articles on Medical Diseases and Conditions

History. A history of easy bleeding or easy bruising should lead to further investigation. Platelet count. Platelet disorders will be discussed later. Using the direct count (reference values 150,000-400,000/mm3; 150-400 x 109/L), a platelet count less than 100,000/mm3 indicates moderate thrombocytopenia, and one less than 50,000/mm3 indicates severe thrombocytopenia. Platelet number can be estimated with […]

The manual procedure that employs a hemocytometer counting chamber and a standard microscope has approximately a 10%-20% error. A some-what similar method that makes use of a phase contrast microscope has a reported error of about 8%. Platelet counting machines can reduce the error even further. Reference values are 150,000-400,000/mm3 (150-400 Ч 109/L) for direct […]