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RADIO I > BIOMECHANICAL EVALUATION TERMS > Flashcards

BIOMECHANICAL EVALUATION TERMS Flashcards

1
Q

generate longitudinal axis of bone

A

bones

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2
Q

delineate articular surface via subchondral cortical markings/landmarks

A

joints

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3
Q

formed by intersection of longitudinal axes of any 2 metatarsals

A

inter metatarsals (IM) angles

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4
Q

formed by intersection of longitudinal axes of metatarsals 1 & 2

A

metatarsus primus adductus angle

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5
Q

formed by intersection of longitudinal axes of 1st met and 1st proximal phalanx

A

hallux abductus angle

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6
Q

relationship of tibial sesamoid to 1st metatarsal longitudinal axis

A

tibial sesamoid position

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7
Q

hallux abductor interphalangeus angle

A

hallux interphalangeus (HIP) angle

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8
Q

formed by lines connecting most distal aspects of mets 1 & 2 with 2 & 5

A

metatarsal (break) parabola angle

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9
Q

difference in distal protrusion of 1st and 2nd metatarsals form their common inter metatarsal vertex, protrusion distance

A

metatarsal protrusion index (MDI) or (MPI)

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10
Q

relationship of subchondral cortices across the 1st MPJ

A

1st MPJ joint congruity

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11
Q

name this type of 1st MPJ joint congruity:

lines parallel

A

congruous

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12
Q

name this type of 1st MPJ joint congruity:

lines cross outside joint

A

deviated

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13
Q

name this type of 1st MPJ joint congruity:

lines cross inside joint

A

subluxed

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14
Q

name this type of 1st MPJ joint congruity:

non-articular

A

dislocated

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15
Q

angle created by distal 1st metatarsal articular set line

referenced to 90 degrees

measures magnitude or intraosseous deformity

ignore DASA, T/F?

A

proximal articular set angle (PASA)

T

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16
Q

what is the normal range for PASA?

A

0-8 degrees

17
Q

angle created by longitudinal axis of 1st proximal phalanx and its proximal articular set line

referenced to 90 degrees

measures magnitude of interosseous deformity

corrected by _____?

A

distal articular set angle (DASA)

akin osteotomy

18
Q

what is the normal range for DASA?

A

0-7 degrees

19
Q

entire deformity is accounted for by alterations in PASA and /or DASA

A

structural HAV deformity

20
Q

PASA + DASA =?

what is this angle?

what is the joint?

PASA and/or DASA is _____?

what do these describe?

A

HA

> 16 degrees

congruous

elevated

structural HAV deformity

21
Q

for positional HAV deformity

what is the HA?

PASA and DASA are normal/abnormal ?

joint is/isnt congruous

PASA + DASA is less than, equal too, greater than to HA

A

> 16 degrees

normal

not congruous

22
Q

entire deformity is accounted for alterations in joint congruity, presumed to be largely result of asymmetric soft tissue influences

A

positional HAV deformity

23
Q

this deformity is accounted for by soft tissue and osseous influences; sum total of intraosseous deformity not enough to account for magnitude of HA elevation

A

combined HAV deformity

24
Q

for combined HAV deformity

what is the HA?

PASA and/or DASA is elevated or depressed?

joint is or is not congruous?

PASA + DASA is less than, equal too, greater than to HA

A

> 16 degrees

elevated

not congruous

25
Q

a number of studies demonstrated that PASA measurements are highly variable between different evaluators

A

the great PASA debate

26
Q

formed by correlating proximal and distal aspects of 5th metatarsal bone

A

lateral deviation angle

27
Q

formed by intersection of longitudinal axis of lesser tarsus bones and that of 2nd metatarsal

angle?

A

metatarsus adductus angle

14 degrees in adult, 11 is average, 8 is ideal

28
Q

formed by the intersection of longitudinal axis of 2nd metatarsal and cuneiform

angle?

A

engel’s metadductus angle

24 degrees or above

29
Q

formed by longitudinal talar axis (column tali) and transection of lesser tarsus

what tis angle?

A

talonavicular angle

70 degrees
+/-10 degrees

30
Q

formed by intersection of longitudinal axes of talus (column tali) and calcaneus

angle?

A

AP talocalcaneal angle

14-21 degrees

31
Q

formed by intersection of longitudinal axes of calcaneus and cuboid bones

angle?

A

cuboid abduction angle

0-5 degrees

32
Q

formed by intersection of column tail and longitudinal axis cuboid

angle

A

talocuboid angle

31 degrees +/- 3 degrees

RADIO I (27 decks)

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