Blood Chemisty Analysis Flashcards
what can increase ALP with all other liver values normal?
early sign of cushings
what can affect bilirubin levels?
light
where is creatine kinase (CK) and creatine phosphokinase (CPK) located?
found chiefly in muscle tissues
what can increased levels of CK and CPK indicate? (6)
- muscle injury
- trauma
- inflammation
4 excercise - surgery
- injection
what can the combined testing of CK and AST confirm in horses?
liver damage
what are some factors that influence enzyme activity? (7)
- temp
- dehydration
- ultraviolet light
- pH extremes
- organic solvents
- heavy metal solvents
what are some dispositions that can cause the lab reference range to vary? (6)
- species
- breed
- sex
- age
- nutrition
- geographic region
how is chemisty analysis used as a diagnostic tool? (2)
- substantiates clinical signs
2. detects subclinical abnormalities
what is the reference range of chemistry analysis based off of?
measuring blood chemistry of clinically normal animals
enzymes are…
proteins inside cells that increase the rate of biochemical reactions
why are enzymes the easiest thing to test?
they remain unchanged during a chemical reaction
what are the enzyme levels in blood?
low levels
what can cause increase enzyme levels?
cell damage
how are enzymes measured?
must be catalyzed in a chemical reaction whos product can be measured
what is the enyme units?
the amount of enzyme necessary to convert 1 macromole of substrate to product in 1 minute
what are the enzymes associated with hepatocellular injury? (3)
- alamine aminotransferse (ALT)
- aspartate aminotransferase (AST)
- sorbitol dehydrogenase
which enzyme is liver specific in dogs and cats?
alanine aminotransferase (ALT)
which enzyme is NOT liver specific in horse, cattle and swine?
alanine aminotransferase (ALT)
what can increase alanine aminotransferase (ALT) levels? (2)
- glucocorticoids
2. anticonvulsants
which liver enzyme is the number one to test for liver function?
alanine aminotransferase (ALT)
puerperal is…
delivery
hyponatremia is…
decreased Na+ (sodium)
what can hyponatremia cause?
vomiting and diarrhea
what is the function of sodium?
maintaining water balance
Na+ is…
sodium
what is the function of chloride?
water balance
what is hypochloremia?
decreased Cl-
what can hypochloremia cause?
vomiting
what is the function of phosphorus?
energy storage
what is hyperphosphatemia?
increased phosphorus
what can hyperphosphatemia cause?
chronic renal failure
what is the function of calcium?
muscular function
what is hypocalcemia?
decreased Ca++
what can hypocalcemia cause?
eclampsia/pluerperal tetany
what can calcium not be measured in?
anticoagulated plasma
what is the function of potassium?
maintaining normal neuromuscular function
what is hypokalemia?
decreased levels of k+
whan can hypokalemia cause? (2)
- vomiting
2. chronic renal failure
what is the function of magnesium?
neuromuscular function and enzyme activator
what is hypomagnesium?
decrease of magnesium
whan can hypokalemia cause?
grass tetany
what are the electrolytes? (6)
- potassium (K+)
- calcium (Ca++)
- phosphorus (P)
- sodium (Na+)
- chloride (Cl+)
- magnesium (Mg)
what can be a cause of increased fibrinogen levels?
inflammation/tissue injury
where is fibrinogen produced?
liver
what does fibrinogen do?
blood clotting
what percent of the total proteins in fibrinogen?
3 - 6%
what an can cause increased levels of globulin proteins? (3)
- infection
- chronic inflammation
- neoplasia
where is albumin produced?
liver
what percent of total protein is albumin?
35 - 50%
which is the second largest protein produce by the liver and B-lymphs?
globulin
what can cause decreased plasma protein?
liver disease
what can be the cause of increased plasma proteins?
chronic inflammation and infection
what does total plasma proteins equal?
all proteins added together
what is the function of plasma proteins?
the production of enzymes, hormones and antibodies
what are the plasma proteins? (3)
- albumin
- globulin
- fibrinogen
when is hypoglycemia seen? (2)
- Insulinoma
2. decreased food intake
when is hyperglycemia seen?
diabetes mellitus
what is insulin resistance?
too little insulin
what is hypoglycemia?
too much insulin
what does glucagon and insulin maintain?
normal glucose levels
where is glucagon produced?
liver
BG levels reflect an equilibrium between…
glucose entering and leaving the blodstream
where is glucose utilized?
body tissues for energy
what can increased levels TLI be associated with?
pancreatitis
what can decreased levels TLI be associated with?
exocrine pancreatic insufficency (EPI)
what is Panacreatic lipase immunoreactivity test (PLI)?
specific test for pancreatitis in cats and dogs
what can a PLI test also indicate?
exocrine pancreatic insufficency EPI
how is trypsin measured?
fecal test
what are amylase and lipase level considered abnormal?
3X
where is amylase and lipase found?
pancrease and GI
when are increased levels of amylase and lipase seen?
injury to pancreatic cells
how are amylase and lipase measured?
blood chemistry
what is pancreatitis?
sudden onset due to an overload of fats causing an overproduction of enzymes
what does trypsin do?
aids in the digestion of protein
what does lipase do?
aids in the digestion of fat
what does amylase do?
aids in the digestion of starch
what are the digestive enzymes? (3)
- amylase
- lipase
- trypsin
what are the kidney values? (2)
- blood urea nitrogen (BUN)
2. creatinin
what is urea?
metabolic waste that result from amino acid break down
azotemia is…
increased BUN
what can cause a false positive BUN?
high protein meal prior to test
what can cause an increased BUN?
pre-renal, renal, and post renal abnormalities
creatinine is…
a nitrogen containing molecule released from muscle at a constant rate
what can cause increased levels of cratinine?
same problems that lead to elevation in BUN
what is the percentage of water and urea in urine?
water 95%
urea 2%
what is is the function of the renal system? (3)
- Eliminates metabolic waste
- maintains normal homeostasis
- produces important hormones
what causes increased bile acid? (2)
- portosystemic shunts
2. chronic liver disease
bile acids are…
produced by the liver and secreted in bile to promote the digestion and absorption of fat from the small intestines
how are bile acids excreted?
reabsorbed from the small intestines and removed form circulation by liver
what are increased levels of bilirubin associated with?
increased RBCs or liver disease
where is bilirubin derived?
hemoglobin released by lysed RBC
what can cause falsely elevated readings of bilirubin in a blood test? (2)
- lipemia
2. hemolysis
what species does gamma glutamyltranspetidase/ferase work well in?
large and small
where can GGT be found?
liver
which enzymes are NOT liver specific? (2)
- alkaline phosphotase (ALP)
2. aspartate aminotransferase (AST)
which of the enzymes are bile flow enzymes? (2)
- alkaline phosphotase (ALP)
2. gamma glutamyltranspetidase/ferase (GGT)
which enzyme is liver specific in all species?
sorbitol dehydrongenase
which enzyme is the best enzyme to test in horses?
aspartate aminotransferase (AST)
which enzyme is not routinely measured?
sorbitol dehydrongenase
what may increase levels of GGT? (2)
- glucocortcoids
2. anticonvulsants
when are increased levels of aspartate aminotransferase (AST) seen?
- muscle inflammation
2. hemolysis of blood sample
which species is ALP useful in?
dogs and cats
when can increased levels of ALP be seen?
- bone injury
2. rapidly growing
what drugs can cause an increase of ALP?
- glucocorticoids
2. anticonvulsants