Knee

Question 1

What are the three ligaments of the knee?

Answer 1

Lateral and Medial Collateral Ligaments (LCL and MCL)
Anterior and posterior cruciate lig

Question 2

Lateral and Medial Collateral Ligaments (LCL and MCL)

Answer 2

Strengthen the medial and lateral aspects of the joint

Question 3

Anterior Cruciate Ligament (ACL)

Answer 3

Controls rotation and forward movement of the tibia

Question 4

Posterior Cruciate Ligament (PCL)

Answer 4

Controls backward movement of the tibia

Question 5

What is the kVp for AP knee?

Answer 5

60-70kVp

Question 6

What is the mAs for AP knee?

Answer 6

7-10mAs

Question 7

What is the centre point for AP knee?

Answer 7

Apex of the patella

Question 8

What is the kVp and mAs for the AP intercondylar knee?

Answer 8

60-70kVp and 7-10mAs

Question 9

Centre for the AP Intercondylar

Answer 9

Perpendicular to the long axis of the tibia, parallel to tibial plateau and will enter knee 1 cm distal to apex of patella
- knee flexed 40-60 deg

Question 10

What is the PA weight bearing knee also referred to as?

Answer 10

Rosenburg view

Question 11

What is the flexion angle for a patient’s knee in AP intercondylar supine?

Answer 11

40-60 degrees depending on patient presentation

Question 12

What is the Rosenburg view?

Answer 12

Bilateral knee x ray posterior

Question 13

What is the patient presentation for Rosenburg view?

Answer 13

Pt is erect facing bucky, knees bent 45 degrees, resting knees against bucky

Question 14

What is the CR for knee PA weight bearing/rosenburg?

Answer 14

CR- Angle the x-ray tube 10deg caudad- centre at the level of knee joint

Question 15

Where do maximum stresses in the knee occur?

Answer 15

Between 30 - 60 degrees of
flexion.

Question 16

What is the kVp and mAs for lateral knees? And what is centring point?

Answer 16

60-70kVp and 7-10mAs

Medial aspect of knee joint

Question 17

For horizontal beam lateral knee, what would be the angle?

Answer 17

Approx. 5 degrees caudal angulation

Question 18

For the horizontal beam lateral knee, is it used for what? And Detects what?

Answer 18

Detects lipohemarthrosis
Demonstrates fluid level in suprapatellar pouch

Question 19

What is the kVp andmAs for the skyline? What is the Centre for the skyline?

Answer 19

60-70kVp
7-10mAs
Centre to apex of patella

Question 20

What is the central ray for the skyline? How much do we bend the knee?

Answer 20

Angle central ray so it’s parallel to the patella and travelling through the joint
we bend the knees 45 degrees

Question 21

Angulation for lat standard would be

Answer 21

5 degrees cephalad

Question 22

For a HBL what would be the angling of the tube?

Answer 22

5 degrees CAUDAD

Question 23

For lateral knee, what is the angle for central ray?

Answer 23

4-7 deg cephalad - dependent on patient presentation

Question 24

Loose bodies are best demonstrated on

Answer 24

intercondylar projections

Question 25

Varus deformity

Answer 25

Medial joint destruction
Outwards

Question 26

Valgus Deformity

Answer 26

Knock knees - gym sticks together
Lateral joint destruction

Question 27

TKR

Answer 27

Total Knee Replacement

Question 28

Patellofemoral dislocation

Answer 28

patella dislocated from femur groove

Question 29

patellofemoral subluxation is

Answer 29

due to ruptured ligament and knee will be dislocated temp

Question 30

Bipartite

Answer 30

2 part patella

Question 31

Tripartitle

Answer 31

3 part patella

Question 32

Osgood Schlatter disease

Answer 32

• Common in children -Boys - stress on tendon causes inflam. on patella lig at tib tuberosity (growth plate)

Question 33

Lipohaemarthrosis

Answer 33

Intra-articular fracture with escape of fat and blood from bone marrow into the joint