lecture 9: osteoporosis Flashcards
can osteoporosis occur in young adults
yes
what is the relationship between osteopororsis and PA
stressing bones strengthens them and decrases chance of osteo
the use of what meds can LEAD TO osteoporosis
corticosteroisds (drugs used to decrease inflammation)
osteoporosis is what type of disease
metabolic disease od the bones
osteo means
bone
porosis means
pourous =cavities in bone
what does DEXA stand for
duel energy xray absorptiometry
what is DEXA used for
osteoporosis diagnosis
what does DEXA scan
Scans the entire body and measures the risk for fracture in
the hip, spine, and wrist
is the level of radiation high or low in DEXA
low
how long does dexa take
less than 5 min
DEXA provides what
provides 2d images of successive bone laters
what does (QCT) stand for
quantitative computed tomography
wha t does QCT measure
Measures BMD in the hip and spine and produces a threedimensional
(3-D) image that shows true volume density
QCT. Can isolate an area for testing
the QCT measures BMD in what part of the body
hip and spine
the DEXA measures the risk of fracture in what body part
hip spine and wristr
is the radiation level higher or lower in dexa or QCT
radiation is higher in QCT
the radiation level is BLANK times higher than in dexa
10x
what is the The only method capable of distinguishing BMD level between the exterior
cortical bone and the interior trabecular bone
quantitative computed tomophraphy
QCT is the only method capable of distringusihing BMD level between what
between the exterior
cortical bone and the interior trabecular bone
what is trabecular bone
where the bone loss begins
true or false: CT scan can measure BMD inside bones
true
true or false DEXA can measure BMD inside bones
false
where does osteoporosis begin
in the spongy bone
BMD is given as two scores, what are they
Tscore
Zscore
what is the Tscore
the deviation from the mean bone density of healthy young adults of the same
gender and ethnicity
what is the Z score
the deviation from the mean bone density of adults of the same age , gender
and ethnicity
which score is the BMD score compared with the score of healthy young adults
tscore
which score is the bmd score compared with the score of adults same age as you
z score
which score compares you to health young adults
t score
which score compares you with adults the same age as you
z score
which score gets rid of the age efect
z score
what t score defines osteoporosis
a t score of -2.5 sd and below
what t score indicares osteopenia and risk of osteo
between -1 and -2.5 sd
if your tscore is between -1.5 sd to -2.5 sd do you have osteopenia or osteoporosis
osteopenia
if your tscore is between 2.5 sd and below do you have osteopenia or osteoporosis
osteoporosis
KNOW HOW TO CALCULATE THE BMD VALUES (SLIDE 8)
.
WHAT IS establish osteoporsis
Preferred term for those with
osteoporosis and having one or more fragility fractures
what is a fragility fracture
A Fragility Fracture is any fall from a standing heigh or less, that results
in a fracture
true or false: A Fragility Fracture is any fall from jumping
false, standing beigh
a body should be able to wistand a fall from what heigh wihotut a fracture
standing heigh
what is the only reason you would get a fracture from standing hiegh
because of an underlying cause that makes the bones fragile
what are the most common areas of establish osteoporosis
wrist, hips and spine
every SD below normal BLANKS the risk for fracture
double
-1 standard deviation equals ______ the risk of fracture
2x
-2 standard deviation equals ______ the risk of fracture
4x
-3 standard deviation equals ______ the risk of fracture
8x
if you have -1 SD from mornal you have osteopenia or porosis
penia
if you have -3 SD from normal you have osteopenia or porosis
osteoporosis
what is used to used to determine whether the loss of bone
density is secondary to another disease or condition
z score