MEDICINE
HAEMATOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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50
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100
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200
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400
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Detailed explanation-1: -definition. A differential blood count is the percentage of each type of white blood cell per 100 white cells counted; the white cells of a normal adult are about 55 percent neutrophils, 30 percent lymphocytes, and small percentages of eosinophils, basophils, and monocytes.
Detailed explanation-2: -To determine the differential, a drop of blood is thinly spread over a glass slide, air dried, and stained with a Romanofsky stain, most commonly the Wright or May-Grunewald-Giemsa technique. Two hundred cells are then counted and classified.
Detailed explanation-3: -Normal Results Neutrophils: 40% to 60% Lymphocytes: 20% to 40% Monocytes: 2% to 8% Eosinophils: 1% to 4%
Detailed explanation-4: -Find a thin area where red cells are not overlapping. In the appropriate area, count the number of platelets on about 4 or 5 successive fields. Average the number and multiply by 15, 000 to obtain a rough estimate of the platelet count. A field with a normal platelet count would contain 9-26 platelets on 100X.