Radiographic Evaluation of HAV Flashcards
should radiographs for evaluating HAV be done WB or NWB?
WB
how is the hallux interphalangeus angle measured?
angle formed by the longitudinal bisection of proximal phalanx and distal phalanx of the hallux
what is the normal hallux interphalangeus angle?
less than 10 deg
how is the hallux abductus angle measured?
angle formed by the bisection of the long axis of the proximal phalanx and 1st met
what is the normal hallux abductus angle?
less than 15 deg
how is DASA measured?
angle formed by the long bisection of the proximal phalanx and the line perpendicular to the line formed by marking cartilage of the base of proximal phalanx
what is the normal DASA?
0-8 deg
what does DASA tell you?
looks at angular deviation of the cartilage at base of proximal phalanx
how is PASA measured?
angle formed by line perpendicular to long bisection of 1st met and a line formed by marking 1st met head cartilage
what does PASA tell you?
evaluates position of articular cartilage of 1st met head
what is normal PASA?
0-8 deg
how is IM angle measured?
angle formed by the longitudinal bisection of 1st met and 2nd met
what is normal IM angle?
0-10 deg
what is considered a mild-moderate deformity?
10-15 deg
what is considered a severe deformity?
> 15 deg