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129 Cards in this Set
- Front
- Back
normal plasma values for ca
|
8.8 to 10.4 mg/dl
2.15 to 2.65 mM/L |
|
3 variables in ca homeostasis
|
intake
excretion exchange w/ reservior |
|
critical values
|
< 6 mg/dl
> 14 mg/dl |
|
< 6 mg/dl s/s
|
depolarization:
tetany spontaneous contraction seizures |
|
< 6 mg/dl
more or less bound acidosis/alkalosis |
more bound
alkalosis (less ions) |
|
> 14 mg/dl s/s
|
hyperpolarization
decreased firing rates lethargy weakness |
|
> 14 mg/dl
bound/unbound acidosis/alkalosis |
decreased bound
acidosis more ions |
|
calciferols --- and --
|
vit d
metabolites |
|
major tx uses of calciferols
prophylaxis and crue of -- ---- tx of metabolic --- and ------ |
nutritional rickets
metabolic rickets osteomalacia |
|
calciferols
tx of --- due to ---- |
hypocalcemia
hypoparathyroidism |
|
calciferols
prevention and tx of --- |
osteoporosis
|
|
ergocalciferol is pure ---
|
vit D2
|
|
route of ergocalciferol
|
oral
iv im |
|
ergocalciferol ci in -- disease
|
liver
kidney (cuz can't hydroxylate) |
|
active form of vit d
|
1, 25
|
|
inert form of vit d
|
24, 25
|
|
calcifediol
normally produced in the ------ metabolic precursor of --- |
liver
1,25 (OH)2 D3 |
|
calcifediol
route ci in: |
oral
ci in kidney disease |
|
calcitriol:
quick/slow acting route: used in -- failure |
quick
oral/injectable renal failure |
|
dihydrotachysterol (DHT)
vit --- analog |
D2
|
|
t/f
dihydrotachysterol (DHT) less effective than vit d in mobilizing bone mineral |
f
more effective |
|
dihydrotachysterol (DHT)
used to maintain ---- in hypoparathyroidism |
plasma Ca
|
|
which break down old bone
|
osteoclast
|
|
which lay new bone
|
osteoblast
|
|
calciferols
vit d bind to -- receptors, complex enters ----- ( a steroid hormone) and leads to proteins synthesis |
cytosolic
nucleus |
|
calciferols
increases -- absorption from gi |
ca
it's major action |
|
what antagonizes calciferols
|
glucocorticoids
|
|
what's involved in absorption
|
IMCal
calbindin Ca-ATPase |
|
calciferols stimulates bone resoption oby ----
also decrease -- ---- by osteoblast |
osteoclast
osteoblast |
|
calciferols critical for -- of new bone
|
mineralization
|
|
calciferols
increase uptake of ca by --- of -- --- |
SR
skeletal muscle |
|
calciferols
decreases -- levels |
PTH
|
|
IMCal located on --- --
------ protein that gets vit D out of Gi tract into cytoplasm |
brush border
transport |
|
recommended ca for kids
|
800-1200 mg
|
|
adolescents ca recommendation
|
1200-1500 mg
|
|
ca recommended
men 25-65 > 65 |
1000mg
1500 mg |
|
ca recommended
women 25-65 > 50 postmen + estrogen > 50 postmen + no estrogen |
1000 mg
1000 mg 1500 mg |
|
women preg and nursing
|
1200 - 1500 mg
|
|
calciferols given to:
|
maintain plasma Ca levels
|
|
calcitonin from --- cells
|
parafollicular cells
|
|
calcitonin lowers --- and --- levels in hyperca
|
ca
phosphate |
|
calcitonin
decreases bone ---- |
resorption (osteocytic osteolysis, osteoclastic bone resorption)
major effect! |
|
calcitonin
decrease renal -- and --- reabsorption |
PO 4
Ca |
|
calcitonin tx
|
paget's disease
osetoporosis metastitc hypercalcemia |
|
paget's disease: acceleration o f --- acitivy coupled w/ increased but ---- bone formation
|
osteoclast
disorganized |
|
calcitonin ci in
|
fish hypersensitivity (calcimar)
pregnancy or breat feeding |
|
t/f
cibacalcin still used |
f
|
|
ciabcalcin -- form
|
human
|
|
ciabcalcin
what's potent: synthetic or natural |
synthetic
|
|
calcimar
-- form |
salmon
|
|
calcimar route
|
sc
im |
|
calcimar has unexplained -- effect
|
analgesic
|
|
miacalcin
route |
nasal
|
|
miacalcin
reduced/increased bioavailability |
reduced bioavailability
|
|
miacalcin has more potent/rapid -- effect
|
analgesic
|
|
miacalcin
may produce --- tis --- bleed -- pain -- ache |
rhinitis
nosebleed back pain headache |
|
biphosphonates inhibitis --- ---
|
bone resorption
|
|
biphosphonates promotes modes increa in -- --- mass
|
spinal bone
|
|
biphosphonates txs
|
paget's disease
metastatic hypercalcemia postmenopausal osetoporosis |
|
biphosphonates ci
-------calcemia ---- abnormalities ----- individuals ----- insufficiency |
hypocalcemia
esophageal abnormalities bedridden individuals renal insufficiency |
|
why bisphosphonates and bedridden/esophageal abnormalities CI
|
due to cytotoxic effects. . .if gets caught can cause damage
|
|
sodium etidronate
synthetic analog of |
pyrophosphate
|
|
sodium etidronate reserved for pts w/ -- to -- paget's diease
--calcemia associated w/ malignant ---- |
moderate to severe
hypercalcemia neoplasms |
|
sodium etidronate
may be used in --- pt htat have extensive bone damage that may jeopardize joints |
asymptomatic
|
|
sodium etidronate routes
|
oral
parenteral |
|
sodium etidronate
poorly/well absorbed |
poorly absorbed
|
|
sodium etidronate
rapidly concentrated in the --- |
bone
so less peripheral toxicity cuz pulled into bone quickly |
|
sodium etidronate
susceptible/resistant to metabolism |
resistant
cuz almost all goes into the bone |
|
2nd gen bisphos
|
alendronate
|
|
alendronate is the first member to -- bone rather than simply prevent bone loss
|
strengthen
|
|
alendronate
does not inhibit one --- like 1st gen |
mineralization
|
|
alendronate
approved for tx of |
postmenopausal osteoporosis and paget's
|
|
alendronate
alleviates -- pain |
bone (paget's)
|
|
alendronate
under investigatin for tumor induced --- |
hypercalcemia
|
|
alendronate
bioavailability: |
less than 1%
|
|
alendronate dose
|
q week (long 1/2)
take when fasting |
|
rare se of alendronate
|
jaw deterioration
|
|
pamidronate:
-- gen |
2nd
|
|
pamidronate: route
|
parenteral
|
|
pamidronate:
rapidly/slowly concentrated in the bone |
rapidly
|
|
pamidronate:
reserved for |
refractory paget's
hypercalcemia from malignant neoplasms hyperparathyroidism resulting in mod to sever bone pain |
|
pamidronate:
cheap/expensive |
expensive
|
|
ibandronate
-- gen |
3rd gen
|
|
ibandronate
reduces -- fx due to osteoporosisi |
vertebral
|
|
ibandronate
1st line tx for --- |
osteoprosis
|
|
ibandronate
under investigation for --- and --- |
malignant hypercalcemia
paget's |
|
ibandronate
administration |
injected q 3 mo
better compliance |
|
risedronate
can be taken when? |
daily
weekly or on two consecutive days q month |
|
t/f
ok to take risedronate w/ food or drink |
f
poorly absorbed (take w/ water) |
|
risedronate
has faster/slower esophageal transit time |
faster
so good for esophageal probs |
|
more chances of hip fx:
risedronate or alendronate |
alendronate
|
|
zoledronic acid
route gen |
IV
3rd gen |
|
which more potent
zoledronic acid or panidronate |
zoledronic acid
|
|
zoledronic acid
administration |
5 mg
q year |
|
Too much aldosterone is what syndrome?
|
Conn's or overactive renin angiotensin system
|
|
zoledronic acid
can cause |
a fib
nephrotoxic |
|
zoledronic acid
reduces -- and -- fx |
vertebral
hip |
|
fluoride
used to tx --- and -- bone disease |
osteoporosis
neoplastic |
|
fluoride
increase vertebral bone ---- by about 10% per year |
mass
|
|
fluoride
tx doses increase the number of -- |
osteoblasts
no only does it slow down bone resorption but also increase bone mass |
|
fluoride
subs -- and -- for hydroxyapatite |
fluorapatite
fluorhydroxyapatite |
|
fluoride
low doses stimlate -- --- formatin |
new bone
|
|
always combine fluoride w/
|
calcium
vit d estrogen |
|
raloxifene
selective -- --- -- |
estrogen receptor modulator
|
|
raloxifene
fda approved for prevention of |
osteoporosis
|
|
raloxifene
produce -- increase in bone density |
modest
|
|
raloxifene
reduces risk of --- --- --- |
verterbral compression fx
|
|
raloxifene
increase risk of |
clot formation
|
|
vit k
low in -- --- victims |
hip fx
|
|
vit k necessary for
|
blood clotting
|
|
vit k
K1 provided by: K2 provided by: |
K1: diet
K2: made by the gut (abx can interfere) |
|
estrogen replacement
-- and -- of osteoporosis |
prevention
tx |
|
teriparatide
-- hormone |
parathyroid
|
|
teriparatide
administration |
intermittent
sq low dose injection stimulate both trabecular and cortical bone formation |
|
teriparatide
low dose injection stimulate both --- and ---- bone formation |
trabecular
cortical |
|
teriparatide
must be injected intermittently in relatively --- ---- |
small boluses
|
|
teriparatide
may prove to be effective tx for -- and other -- --- disorders |
osteoporosis
bone related disorders |
|
parathyroid hormone release controlled by
|
ca levels
|
|
parathyroid hormone
kidney ncrease ---- resoprtion increase production of ----- |
tubular
1,25 |
|
parathyroid hormone
bone increase -- --- increae --bone resorption |
osteocytic osteolysis
osteoclast |
|
parathyroid hormone
increases --- absorption by increasing -- in the gi |
ca
1,25 |
|
parathyroid hormone
increase --- levels |
ca
|
|
cinacalcet
mimics the -- -- of calcium to inhibit pth secretion |
stimulatory effect
|
|
cinacalcet
a -- derivative |
phenyalkylamine
|
|
cinacalcet
approved for tx of ----- |
hyperparathyroidism
|
|
cinacalcet
provides sustained normalization of serum - w/o altering --- --- -- |
ca
bone mineralization density |
|
cinacalcet
may produce -- calcemia |
hypocalcemia
|
|
cinacalcet
may interact w/ drug aht regulate --- --- |
ca homeostatsis
|
|
t/f
osteoporosis is a disease |
f
a condition |