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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