| Blood tests help us to determine causes of illness
accurately, safely and quickly, and let us monitor the progress of
medical treatments. To help you understand your pet’s test results,
this guide explains common tests. If you have any queries, please
ask one of the vets or nurses at the clinic.
COMPLETE BLOOD COUNT (CBC):
A CBC gives information on hydration status, anaemia, infection,
the blood’s clotting process and the ability of the immune
system to respond. This test is essential for pets with fevers,
vomiting, diarrhoea, weakness, pale gums or loss of appetite. If
your pet needs surgery, a CBC can detect bleeding disorders or other
unseen abnormalities.
HCT (haematocrit) measures the percentage of
red blood cells to detect anaemia and dehydration.
Hb & MCHC (haemoglobin and mean corpuscular
haemoglobin concentration) are the oxygen carrying pigments of red
blood cells.
WBC (white blood cell count) measures the body’s
immune cells. Increases or decreases indicate certain diseases or
infections.
GRANS and L/M (granulocytes and lymphocytes/ monocytes)
are specific types of white blood cell.
EOS (eosinophils) are a specific type of white
blood cell that may indicate allergic or parasitic conditions.
PLT (platelet count) measures cells that form
blood clots.
RETICS (reticulocytes) are immature red blood
cells. High levels indicate regenerative anaemia.
BLOOD CHEMISTRIES:
These common blood serum tests evaluate organ function, electrolyte
status, hormone levels and more. They are especially important in
evaluating older pets, pets with vomiting and diarrhoea or toxin
exposure, pets receiving long-term medications, and health prior
to anaesthesia.
ALB (albumin) is a protein that helps evaluate
hydration, haemorrhage and intestinal, liver and kidney disease.
ALKP (alkaline phosphatase) elevations may indicate
liver damage, Cushing’s disease and active bone growth in
young pets.
ALT (alanine aminotransferase) is a sensitive
indicator of active liver damage but does not indicate the cause.
AMYL (amylase) elevations show pancreatitis or
kidney disease.
AST (aspartate aminotransferase) increases may
indicate liver, heart or skeletal muscle damage.
UREA (blood urea nitrogen) indicates kidney function.
An increased blood level is called azotaemia and can be caused by
kidney, liver and heart disease, urethral obstruction, shock and
dehydration.
Ca (calcium) deviations can indicate a variety
of diseases. Tumours, hyperparathyroidism, kidney disease and low
albumin are just a few of the conditions that alter serum calcium.
CHOL (cholesterol) is used to supplement diagnosis
of hypothyroidism, liver disease, Cushing’s disease and diabetes
mellitus.
Cl (chloride) is an electrolyte often lost with
vomiting and Addison’s disease. Elevations often indicate
dehydration.
Cortisol is a hormone that is measured in tests
for Cushing’s disease (the low dose dexamethasone suppression
test) and Addison’s disease (ACTH stimulation test).
CREA (creatinine) reveals kidney function. This
test helps distinguish between kidney and non-kidney causes of elevated
UREA.
GGT (gamma glutamyl transferase) is an enzyme
that indicates liver disease or corticosteroid excess.
GLOB (globulin) is a blood protein that often
increases with chronic inflammation and certain disease states.
GLU (glucose) is a blood sugar. Elevated levels
may indicate diabetes mellitus although slight elevations may be
a result of stress. Low levels can cause collapse, seizures or coma.
K (potassium) is an electrolyte lost with vomiting,
diarrhoea or excessive urination. Increased levels may indicate
kidney failure, Addison’s disease, dehydration and urethral
obstruction. High levels can lead to cardiac arrest.
LIP (lipase) is an enzyme that
may indicate pancreatitis.
Na (sodium) is an electrolyte lost
with vomiting, diarrhoea, and kidney and Addison’s disease.
This test also helps indicate hydration status.
PHOS (phosphorus) elevations are
often associated with kidney disease, hyperthyroidism and bleeding
disorders.
TBIL (total bilirubin) elevations
may indicate liver or haemolytic disease. This test helps identify
bile duct problems and certain types of anaemia.
TP (total protein) indicates hydration
status and provides additional information about the liver, kidneys
and infectious diseases.
T4 (thyroxine) is a thyroid hormone.
Decreased levels can often signify hypothyroidism in dogs, whilst
high levels indicate hyperthyroidism in cats.
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