Practical Hematology Quiz

Practical Hematology and Blood Sampling

• Whole blood constitutes 8% of body weight, with water making up 91.5% of its composition.
• Plasma accounts for 55% of blood, with plasma protein comprising 7% and other solutes 1.5%.
• Cells make up 45% of blood, with RBCs ranging from 4.5-6 million/mm3, platelets from 150,000-400,000/mm3, and WBCs from 4000-11000/mm3.
• The composition of plasma proteins includes albumin at 54%, globulin at 38%, fibrinogen at 7%, and other proteins at 1%.
• Hematology is the science that studies the characteristics of blood samples, with the purpose of diagnosing blood parasites, before blood transfusions, and for detecting blood groups and biochemical substances.
• Ordinary hematological investigations involve RBCs count, WBCs count, DLC, TLC, PCV, ESR, and Platelets count.
• Precautions before taking blood samples include choosing a healthy site free from edema or abscess, sterilizing the site with 75% ethyl alcohol, and ensuring the needle and syringe are clean and sterilized.
• The amount of blood drawn depends on the type and size of the animal, with small animals requiring 3 cm and large animals requiring 5 cm.
• Sites for taking blood samples in different animals include the jugular vein for cattle, horse, sheep, and goat, and the saphenous vein or cephalic vein for dogs.
• The aims of blood sampling include diagnosing blood parasites, before blood transfusion, detecting blood groups, and diagnosing biochemical substances.
• Ordinary hematological investigations involve RBCs count, WBCs count, DLC, TLC, PCV, ESR, and Platelets count.
• Precautions before taking blood samples include choosing a healthy site free from edema or abscess, sterilizing the site with 75% ethyl alcohol, and ensuring the needle and syringe are clean and sterilized.