7: Pelvis and Hip joint Radiology

Question 1

What is good imaging modality for pelvis

Answer 1

Xray is good for bone but not soft tissues which can also be damaged
So MRI for soft tissue

Question 2

What is the Greater sciatic notch in the pelvis

Answer 2

It is the inward notch on the bony lateral side of the greater sciatic foramen made with the ligaments of the pelvis

Question 3

What are the Pubic bones

Answer 3

Superior and inferior ramus which go to the middle at the pubic tubercle which is palpable. In

Question 4

What are Ischium bones

Answer 4

The Ischial spine which is the bony extension posteriorly for a ligament to attach to to make the greater sciatic foramen. Its
The ischial tuberosity which is the lateral end of the ischium body which makes the bottom half of the obturator foramen with the pubis

Question 5

What is the crest between the Great trochanter and the Lesser trochanter on anteriorly and posteriorly

Answer 5

Intertrochanter crest on the posterior

Intertrochanter line on the anterior

Question 6

What is the acetabulum

Answer 6

Fusion of all 3 pubic bones that the hip that articulates with the over 1/2 of the head of the femur.

Question 7

Describe the articular cartilage of hip joint

Answer 7

The articular cartilage is a lunate surface with acetabular fossa in the middle and completed anteriorly by the Transverse acetabular ligament. This makes a small gap for the vessels Ligamentum Teres femoris + artery to go and come.

Question 8

Which proximal femur fractures are intracapsular vs extracapsular

Answer 8

Intra= Capital, Subcapital and Transcervical (around head and last through neck)

Extra= intertrochanteric and subtrochanteric (lower down)

Question 9

What are the risks of intracapsular: subcapital/transcervical proximal femur fractures

Answer 9

Risk damage to the retinacular branches of the circumflex arteries supplying the head of the femur.
Can lead to Avascular necrosis of the head if blood flow is not restored

Question 10

How is a proximal femur fracture (neck of femur) fixed

Answer 10

A plate can be inserted and screw can be put into neck to realign/anchor. Or hip joint can be replaced with screws and plates for anchorage

Question 11

In what direction does the majority of dislocation of the hip joint go

Answer 11

Posteriorly (sup and lateral) vs anteriorly (inferiorly and medial). This leads to a lot of damage because hip joint is very stable so in order to dislocate can risk avascular necrosis etc