Clinical Chemistry (workbook) Flashcards
Define preprandial
Not eaten recently (~12 hours)
Chemical measurements should be completed within _______ after blood collection
1 hour
The fluid portion of whole blood is termed
Plasma
How does a spectrophotometer work?
It uses a prism to select a specific wavelength of light
How does a colorimeter work?
It uses a filter to select a specific wavelength of light
What is prehepatic bilirubin?
Bilirubin bound to albumin
What does an increase in prehepatic bilirubin indicate?
Hepatic damage/problems with uptake
What does an increase in conjugated bilirubin indicate?
A bile duct obstruction
Cholesterol assay is used as a screening test for
Hypothyroidism
2 common enzyme tests for liver function
AST, ALT
What does AST stand for?
Aspartate Aminotransferase
What does ALT stand for?
Alanine Aminotransferase
Osteoblasts, chondroblasts, and cells of the hepatobiliary system in the liver contain isoenzymes of
AP
What does AP stand for?
Alkaline phosphatase
2 primary serum chemistry tests for kidney function?
BUN and serum creatinine
In most mammalian species, uric acid is converted to ______ before being excreted in the urine
Allantoin
The major end product of nitrogen metabolism in avian species and dalmations
Uric acid
This test evaluates glomerular function by using test substances eliminated by both glomerular filtration and renal secretion
Effective Renal Plasma Flow (ERPF)
A type of test that describes the excretion of specific electrolytes relative to the glomerular filtration rate
FC (Fractional Clearance) or FE (Fractional Excretion)
These are the same test.
4 tests of endocrine functions of the pancreas
Blood glucose, fructosamine, b-hydroxybutyrate, glycosylated hemoglobin
What is b-hydroxybutyrate?
A ketone
Increased fructosamine indicates a persistent hyperglycemia of how long in dogs and cats?
1-2 weeks
Increased glycosylated hemoglobin indicates a persistent hyperglycemia of how long in dogs? Cats?
Dogs - 3-4 months
Cats - 2-3 months
Ketoacidotic patients produce mostly this ketone
B-hydroxybutyrate
The kidneys play a major role in regulating the concentration of this molecule by actively secreting or resorbing it from filtrate in response to the blood pH
Bicarbonate
Increased level of lactate indicates (2)
Hypoperfusion or hypoxia
This equipment is designed to measure the amount of light transmitted through a solution
Spectrophotometer
Define the term “glycosylated”
It represents the irreversible rxn of glucose bound to the protein
Increased urea in the blood is called
Azotemia
What is bilirubin?
An insoluble molecule derived from the breakdown of hemoglobin
What is albumin?
The major binding and transport protein in the body. It is responsible for maintaining osmotic pressure of plasma
Plasma from which the fibrinogen has been removed is called
Serum
5 causes of hemolysis in samples
Blood drawn into moist syringe, blood mixed too vigorously after collection, blood forced through needle into tube, blood frozen as whole blood, excess alcohol was left on skin and not allowed to dry
3 causes of hyperproteinemia
Dehydration, bacterial infections, inflammation
2 causes of hypoproteinemia
Overhydration, albumin loss
4 causes of hypernatremia
Dehydration, diabetes (because of high water loss), burns, kidney issues
5 causes of hyponatremia
Water retention, solute loss, vomiting, diarrhea, kidney defects
3 causes of hyperkalemia
Hypersupplementation, not peeing enough, kidney issues
5 causes of hypokalemia
Kidney disease, K+ loss through urine, diarrhea, vomiting, intestinal obstruction
Why are dehydration and azotemia related?
Kidneys normally filter blood. When the volume or blood pressure through the kidneys drops, they cannot filter as effectively so urea remains in the blood.
Which 2 tests are commonly performed to evaluate the acinar functions of the pancreas?
Amylase, Lipase
What are two less commonly performed tests to evaluate acinar function of the pancreas? Which one is used in cats?
Trypsin-like immunoreactivity, Serum pancreatic lipase reactivity.
Cats - Serum PLI
Define cholestasis
Any condition in which bile excretion from the liver is blocked
What does a photometer do?
Measures the amount of light transmitted through a solution