Witwer Flashcards
what is the hard outer shell of the bone made of
cortical (compact) bone
what is the interior of bone made of
cancellous (spongy) bone
which portion of the bone contains nocireceptors, and is highly pain sensitive
periosteum
does the bone marrow also have pain receptors?
yes
how is pain from fx and OA characterized
deep somatic, dull, aching, poorly localized
ossification centers are divided into
primary
secondary
where is the primary ossification center located
diaphysis
where is the secondary ossification center located
epiphysis
name 4 things to look for in a bone xray
- bone destruction
- associated soft tissue changes
- alignment change
- bone deposition/proliferation
how do you classify and describe fx’s? (8)
- age
- location
- number and nature of fragments
- open or closed
- direct, pattern, and type of fracture line
- relationship of fragments to one another
- subluxation or dislocation
- articular involvement
what does distraction mean
increased length of bone (pulled apart)
what does displacement mean
a gap forms where the bone breaks
what does angulation mean
the ends of bone bone fragments are at an angle to each other
how is angulation described (3)
- direction of distal fragment is angled in relation to proximal fragment
- varus/vagus
- direction apex is pointing relative to long axis of bone
what is the most common type of angulation
direction of the distal fragment is angled in relation to the proximal fragment
describe varus
inward angulation
(apex lateral)
describe valgus
angled outward
(apex medial)
what is an open (compound) fx
bone pokes thru the skin
what is a closed fx
skin intact
what is a major concern in a compound fx
osteomyelitis
what 3 terms are used to describe fx location
- proximal
- mid-shaft
- distal
what is this type of fx called
transverse fx
what is this type of fx called
open/compound
what is this type of fx called
oblique fx
what is this type of fx called
oblique, displaced
what is this type of fx called
comminuted
what is this type of fx called
segmental
what is this type of fx called
avulsion
what is this type of fx called
spiral
what is this type of fx called
greenstick
how do you describe the distal fragment of a fx in relation to the proximal fragment (4)
- displacement
- angulation
- shortening
- distraction
how do you describe this fx
distraction without displacement
how do you describe this fracture
lateral displacement without angulation
how do you describe this fx
complete lateral displacement with shortening and without angulation
how do you describe this fx
lateral angulation (30degrees) without displacement
how do you describe this fx
lateral displacement (~50%) and lateral angulation (about 45 degrees)
how do you describe this fx
complete medial displacement with shortening and lateral angulation (~45 degrees)
when you see a fracture in one part of a ring, what should you be looking for
a fracture in another part of the ring
how do you evaluate symmetry
compare it to the normal side
pediatric fractures at the end of long bones often involve
growth plates
what classification system is used to evaluate pediatric fractures
Salter-Harris
Salter-Harris - Normal
which type of Salter Harris fx is this
type I: complete physeal fx with or without displacement
which type of Salter Harris fx is this
type II - physeal fx that extends thru the metaphysis, producing a chip fx of the metaphysis, which may be very small
which type of Salter Harris fx is this
type III - physeal fx that extends thru the epiphysis
what type of salter harris fx is this
type IV - physeal fx PLUS epiphyseal and metaphyseal fx’s
what type of salter-harris fx is this
type V - compression fx of the growth plate