SAMUEL CHARACHE, M.D.
A new device (QBC hematology system; Clay Adams, Parsippany, New Jersey) makes it possible to estimate total leukocyte count, proportion of granulocytes, and platelet count, as well as the packed erythrocyte volume, from what is essentially a microhematocrit tube (1). Small enough for a physician's office and much cheaper than electronic devices that actually count erythrocytes, leukocytes, and platelets, the machine could offer real savings in the time spent between obtaining a sample and getting a report. Using a special float to spread out the buffy coat, and a fluorescent dye that stains nucleotide and leukocyte granules, the method is
CHARACHE S. Instant Blood Counts. Ann Intern Med. 1985;102:852–853. doi: 10.7326/0003-4819-102-6-852
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Published: Ann Intern Med. 1985;102(6):852-853.
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