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OITE > Sports > Flashcards

Sports Flashcards

1
Q

What is the blood supply of the ACL?

A

Middle geniculate artery

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2
Q

What is the innervation of the ACL?

A

posterior articular nerve

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3
Q

What is a Segond fracture?

A

Avulsion off proximal lateral tibia; pathognomonic for ACL tear; represents bony avulsion by the ALL (anterolateral ligament)

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4
Q

What is the bone bruising pattern seen on MRI in an ACL rupture?

A

middle 1/3 of LFC (sulcus terminalis) posterior 1/3 of lateral tibial plateau

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5
Q

What is the empty notch sign seen on MRI?

A

Fluid next to lateral wall of LFC; indicative of ACL rupture

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6
Q

Name these structures

A

middle genicular artery supplies ACL

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7
Q

Which bundle of the ACL is primarily responsible for rotational stability?

A

posterolateral bundle of the anterior cruciate ligament (ACL) is primarily responsible for rotational stability of the knee

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8
Q

What is the origin of the LCL?

A

posterior (3.1 mm) and proximal (1.4 mm) to lateral epicondyle; posterior and proximal to origin of popliteus; popliteus origin is 18.5 mm from LCL origin

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9
Q

What is the relationship of the origin of the LCL and the origin of the popliteus?

A

posterior and proximal to origin of popliteus; popliteus origin is 18.5 mm from LCL origin

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10
Q

What is the most anterior structure on the proximal fibula?

A

The LCL

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11
Q

What is the posterior wall sign?

A

Posterior rim of acetabulum is medial to center of femoral head (seen in acetabular retroversion)

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12
Q

What is a normal hip α angle?

A

less than 42 deg; greater than 50 deg indicates Cam lesion

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13
Q

What is a normal head-neck offset ratio?

A

0.17; <0.17 indicates cam deformity

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14
Q

What is a normal lateral center edge angle and a anterior center edge angle?

A

40 deg and 20 deg

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15
Q

What is the Ganz open hip surgical dislocation?

A

Kocher approach - split the glute max then perform a digastric greater trochanter osteotomy, capsulotomy is performed, dislocate anteriorly.

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16
Q

What is the origin of the LCL in relation to the popliteus origin?

A

Posterior and superior to popliteus

17
Q

What is the mechanism of injury when a patient sustains a Segond fracture?

A

internal rotation and varus load (compared to most ACL injuries which are valgus stress)

18
Q

What are the two bundles of the ACL?

A

Anteromedial and Posterolateral

19
Q

Which bundle of the ACL is examined by the pivot shift test?

A

Posterolateral bundle

20
Q

On the femur, what is the orientation of the ACL bundles?

A

Anteromedial originates more proximally than the posterolateral bundle

21
Q

Which ACL bundle is the primary restraint to anterior tibial translation?

A

Anteromedial

22
Q

Who is the optimal candidate for a latissimus dorsi transfer?

A

young laborer with massive posterosuperior rotator cuff tear with atrophy and signific

23
Q
A

OITE (13 decks)

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