Pelvis

Question 1

Normal angulation of a femur?

Answer 1

15-20 deg

Question 2

Best way to visualise the NOF

Answer 2

Internal rotation of the foot, leads to anteversion

Question 3

Radiation protection for Pelvis

Answer 3

Gonadal

for females sheild 1.5cm cm from pube symph , can always place sheilding diagnonally.

Question 4

If a patient cannot roll for a lateral hip what projection should be used?

Answer 4

Danelius-Miller “shoot through Lateral’

Question 5

IF a patient cant roll or lift theyre good leg, what projection should be used for a lateral pelvis?

Answer 5

Clements-Nakayama.

Question 6

What other image should be taken if there is a suspected # of pelvis?

Answer 6

CxR

Question 7

What projection is best used for a pubic symphysis #?

Answer 7

Inlet/ Outlet.

Question 8

What are the standard projections for pelvis?

Answer 8

AP hip/ pelvis

Lateral

Question 9

Whats important to remember during hip projections

Answer 9

Prosthesis (wider collimation)

Question 10

IF the foot is in internal rotation where will the greater trochanter be projected?

Answer 10

Laterally.

Question 11

Describe patient positioning for lateral hip

Answer 11

Unafflicted leg is raised out of way, typically elevated by a sponge

affliected leg is abducted and turned into ext roration (like a single frog leg).

Question 12

Positioing of trochanters on a lateral hip?

Answer 12

close to SI

Question 13

Angulation and anatomy shown for Inlet pelvis view

Answer 13

40 caudad

Pube symph projected inferiorly, pelvic cavity shown
Ischium is anterior to pelvis

Question 14

Angulation and anatomy shown for outlet view

Answer 14

35 cephalad

Pube symph projected superiorly

Pubic symph over mid sacrum. Obturator shown.

Question 15

another name for frog-legged pelvis

Answer 15

Bilateral Lateral pelvis/ hip

Question 16

What is Frog-legged pelvis view typically used for?

Answer 16

SKFE

Calve’s

Question 17

Why is clements-nakayama done without a grid?

Answer 17

Air gap and double agnulation increases grid cut off.

Question 18

Which is the other trauma lateral that is typically never used?

Answer 18

Sanderson

Question 19

Bucket handle #

Answer 19

High energy sagital force -> compression

Illiac crest moves superiorly nad medially as it ‘pivots’ off the spine.

to obturator foramen and unilateraly SI disruption.

Look a tthe pelvis bilaterally to see a unilateral rotation.

Question 20

Common MOI for pevlis injuries

Answer 20

falls.

Question 21

what does 6/7 mean on a patients clinical history

Answer 21

6 out of 7 days.

Question 22

Duverney fracture

Answer 22

Saggital Force to illac crest

on illac crest.

Less complications diue to less Mm. on illiac crest.

Question 23

Another name for pubic symphysis dislocation

Answer 23

DIASTASIS

Question 24

Reasons to not do SI projection prone (PA)

Answer 24

Dose
increased FFD
more painful for patient.

Question 25

Common MOI for SI joint dislocation

Answer 25

Child birth
Coronal F to illac crest
Bike riding
any external roational force to illiac crest.

Question 26

Straddle #

Answer 26

Coronal F applied directly to pubic symphysis through saddle or Motorbike.

2 # to superior and inferior obturator foramen. BILATERAL.

meaning 4# quadpartite.

further imaging needed for ballder and viscera.

Question 27

Vertical sheer / malgaigne #

Answer 27

Unilateral shearing F -> compression. e.g. falling off balcony and landing on one leg.

Vertical # through Hemi-pelvis. 3 or more # +/- disconuinitiesto obturator foramen and SI joint.

HEMIPELVIS IS PUSHED SUPERIORLY.

Question 28

Most common NOF #

Answer 28

Intertrochantric #

Question 29

NOF survival rate

Answer 29

25%

Question 30

If a leg is naturally internally rotated what could it be an indication of?

Answer 30

Hip dislocation

Question 31

IF a leg is externally rotate what can it be an indication of?

Answer 31

NOF#

typically foreshortened and NOF # due to snapped Psoas tendon.

Question 32

Sub capital NOF #

Answer 32

below articular surface of #

CAN HAVE MINIMAL DISPLACEMENT

High chance of disrupting blood supply.

Question 33

Intertrochantric #

Answer 33

Older patients and falling #

follows the greater and lesser trochanter

Treated with gamma nail

typically use Denilius-Miller.

Question 34

Whcih NOF # is a common Insufficency #

Answer 34

Intertrochanteric.

Question 35

What direction do most hip dislocations move in?

Answer 35

Posteriorly 90%

Question 36

Can a hip dislocation foreshorten the leg?

Answer 36

yes.

Question 37

What projection is needed to assess a hip dislocation for allignment?

Answer 37

Lateral

Question 38

What patient presentation typically causes a hip dislocation?

Answer 38

Prosthesis.

Question 39

What does SCFE stand for?

Answer 39

Slipped capital femoral epiphysis.

Question 40

Slipped Capital Femoral Epiphysis.

Answer 40

Dislocation of growth plate (DONT MISTAKE FOR #)

Common with adoloscent males with hypersthenic

Cant occur once growth plate has fused.

Need to be aware of femoral vasculature and growth plate.

secure dislocation without prematural growth plate fusion.

try to avoid CT due to dose.

Question 41

Legg-Calve-Perthe’s dissease

Answer 41

MOI : UKNOWN

Flattened or teardrop fem head.

Avascularisation of femoral articular surface .

crumbled femoral head + shallow acetabulum.

Predisposition to: Dislocation, Poor Gait, Arthritic change.