HAV ANGLES Flashcards

1
Q

normal intermetatarsal angle (IMA)?

in adducted foot?

A

8-12 degrees

8-10 degrees

*bisection of 1st and 2nd metatarsals

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2
Q

metatarsus adductus angle (MAA) for rectus foot?

A

<15 degrees

*Relationship between long axis of 2nd met and the longitudinal bisection of the lesser tarsus

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3
Q

metatarsus adductus angle (MAA) for adducted foot?

A

> 15 degrees

*Relationship between long axis of 2nd met and the longitudinal bisection of the lesser tarsus

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4
Q

relationship between long axis of 2nd met and longitudinal bisection of the lesser tarsus?

normal adult?
pathologic?

A

5-17 degrees per McGlamry

20 degrees plus

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5
Q

how to measure an accurate IMA in the presence of MA?

A

IMA + (MAA-15 degrees) = true IMA

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6
Q

alternative way to measure met adductus

bisection of 2nd met and bisection of intermediate cuneiform

normal less than 24 degrees

A

engel’s angle

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7
Q

whats the hallux abductus angle (HAA)?

A

10-15 degrees

Bisection of 1st metatarsal and
proximal phalanx of hallux

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8
Q

hallux interphalangeus angle (HIPA)?

A

0-10 degrees

Bisection of the distal and
proximal phalanx of the
hallux

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9
Q

proximal articular set angle (PASA)?

A

0-8 degrees

relationship between
long axis 1st met and a
line connecting medial/lateral points of articular surface of methead

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10
Q

distal articular set angle (DASA)?

Rarely abnormal

relationship between long axis of phalanx and a line connecting medial/lateral points of articular surface of
base of phalanx

A

0-8 degrees

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11
Q

metatarsal protrusion distance (MPD)?

A

+/- 2mm

length of 1st met compared to 2nd

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12
Q

tibial sesamoid position,

normal?

A

1-4

position of sesamoid along axis of 1st metatarsal

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