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2 RA > 2 The Pelvis as an anatomical ring > Flashcards

2 The Pelvis as an anatomical ring Flashcards

1
Q

define ecchymosis

A

discoloration of the skin resulting from bleeding underneath

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2
Q

Name 3 exceptions to the notion that pelvic fractures usually occur in 2 places

A

osteoporosis
stress fractures
avulsion fractures

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3
Q

What fracture will occur in a disruption of the ankle joint?

A

Pott’s fracture

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4
Q

What ligaments stabilise the pubic symphysis?

A

superior pubic ligament
arcruate pubic ligament
anterior pubic ligament

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5
Q

What 3 ligaments comprise the sacroiliac complex?

A

interoseous sacroiliac
posterior sacroiliac
iliolumbar

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6
Q

What 2 ligaments comprise the pelvic floor?

A

Sacrospinous ligaments

sacrotuberous ligaments

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7
Q

What types of Anterior Posterior Compression fractures are there?

A

Type 1
Type 2
Type 3

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8
Q

What types of lateral compression fractures are there?

A

Type 1
Type 2
Type 3

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9
Q

At what level does the aorta bifurcate into the common iliacs?

A

L4

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10
Q

What is the course of the external iliac?

A

goes anteriorly along the pelvic brim

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11
Q

What is the course of the internal iliac?

A

dives in the posterior divisions and anterior divisions

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12
Q

What is the corona mortis?

A

connection between the obturator and external iliac systems

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13
Q

Why are SIJ injuries so common?

A

not much musculature crossing the joint, so it has to depend on its’ ligamentous tissues

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14
Q

What is a type 1 anterior compression facture?

A

symphysis widening < 2.5cm

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15
Q

What is a type 2 anterior compression fracture?

A

symphysis widening >2.5 cm

anterior SIJ diastasis
Posterior SIJ ligaments intact
disruption of sacrospinous and sacrotuberous ligaments

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16
Q

What is a Type III anterior compression fracture?

A

disruption of anterior and posterior SIJ ligaments (dislocation)

disruption of sacrospinous and sacrotuberous ligaments

17
Q

What is a lateral compression type 1 fracture?

A

oblique or transverse ramus fracture and ipsilateral anterior sacral ala compresison fracture

18
Q

What is a lateral compression type 2 fracture?

A

LC II rami fracture and ipsilateral posterior ilium fracture dislocation (cresent fracture)

19
Q

What is a lateral compression type 3 fracture?

A

Ipsilateral lateral compression and contralateral APC (windswept pelvis)
common mechanism is rollover vehicle accident or peestrian vs auto

20
Q

What is a vertical shear fracture?

A

posteior and superior directed force

associated with the highest risk of hypovolaemic shock (63%), mortality rate up to 25

2 RA (12 decks)

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