Haematology Theory 💉 Flashcards
(43 cards)
What are the common venepuncture sites for blood collection?
- Jugular vein
- Cephalic vein
- Saphenous vein
- Lateral ear vein (rabbits)
What gauge needle is commonly used for blood collection in most animals?
21-gauge (green) needle.
Notes…
Using the correct gauge is crucial to prevent damage to blood cells.
What is the risk of using a smaller needle, such as a 23-gauge (blue)?
It risks damaging the blood cells and could artificially alter the results.
What technique is employed to raise the vein for blood collection?
Occluding flow by applying pressure either by yourself or a colleague.
.
What must be added to blood samples if plasma is needed?
An anticoagulant must be added to stop the blood from clotting.
Notes…
Lithium heparin (orange or green)
What is the difference between blood samples for plasma and serum?
Plasma requires anticoagulant; serum is obtained without anticoagulant allowing clotting.
Understanding this distinction is vital for conducting various laboratory tests.
What must be added to blood samples if plasma is needed?
An anticoagulant must be added to stop the blood from clotting.
Anticoagulants are necessary for tests that require plasma.
What is the tube type for plain blood collection?
White / clear
Used for serum biochemistry tests.
What colour tube is lithium heparin?
Orange
What colour is a fluoride oxalate tube?
Yellow
What is the primary use of EDTA tubes?
Haematology
What effect does EDTA have on results?
Falsely elevates potassium concentrations and decreases calcium and magnesium concentrations.
What does EDTA bind, leading to false decreases in test results?
Calcium and magnesium
What are the two main types of modern haematology analysers?
Coulter counter and flow cytometer
Both are used for total blood counts.
What types of cells can haematology analysers differentiate?
Different types of blood cells
This helps in diagnosing various conditions.
What are the normal red blood cell counts for dogs?
5.5 - 8.5 x 10^12/1
This range is essential for assessing canine health.
What is the normal white blood cell count for cats?
5.5 - 19.5 x 10^9/
Monitoring WBC count is crucial for feline health.
Fill in the blank: EDTA stands for _______.
ethylene diamine tetra acetic acid
A common anticoagulant used in blood collection.
What test is fluoride oxalate used for?
Glucose
What colour is a citrate tube and what is it used for?
Blue or pale green, clotting profiles
What tubes can be used for serum blood biochemistry?
Plain (white) plain with gel (brown).
What % of leukocytes are neutrophils?
60-70%
What % of leukocytes are eosinophils?
3-5%
What % of leukocytes are basophils?
O-1%
