Flashcards in Clinical Biochem Deck (39)
major ECF cation
low sodium (water retention)
high sodium (most likely dehydration)
major ICF cation
high potassium (renal insufficiency)
- may trigger cardiac arrest with no warning
- affects muscle function
buffer system controlled by lungs and kidneys
- acid/base balance
- monitored for diabetic ketoacidosis, glucose, pH, and electrolyte concentration
- mostly in bones
- also a 2nd messenger
- affects muscular and neuronal function
- problems or degradation of bones
- hormonal disturbances
stored in bones
indicative of degenerative bone disease
- can impair glucose metabolism
- possible renal failure
If kidney function is impaired, what will the serum and urine levels of urea/creatinine?
serum - high
urine - low
When is BUN high a potential problem?
When protein intake and catabolism are normal and BUN is high
- insensitive marker
- measure of kidney function
- it is released at a constant rate
end product of purine degradation
high uric acid value is indicative of what?
sign of kidney problems and predispose to gout
conjugated to glucuronic acids and water soluble
unconjugated to glucuronic acid
When will you find proteins in urine?
proteins in urine is not normal
- it's indicative of decreased kidney function
- made by liver
- binds to hydrophobic molecules
- binds calcium
- maintains oncotic pressure
manifest as edema
- water is drawn out of serum and into tissues
- common cause is liver disease
If globulin is found in the serum, what is it indicative of?
impaired immune system function
- secreted by liver
- marker for acute metabolic response to injury
- should rise 6 hours after injury, peaking at 48 hours and decay slowly
*sudden in rise in CRP indicate complications in healing process
Which heart muscle enzyme is most sensitive marker for MI and can be detected very early?
heart muscle enzyme myoglobin
first to release after MI
not heart muscle specific
just indicate there's muscle damage
What's the order in which heart muscle enzymes appear after MI?
soonest to latest:
myoglobin, troponins, creatine kinase, AST, LDH
indicative of bone and liver disease