FOOT AP OBLIQUE

Question 1

What is the short critique for an oblique foot X-ray?

Answer 1

Cuboid and cuneiform joint space open
2-5th inter metatarsals joint spaces open
Sinus tarsi open
5th tuberosity seen
Base of thirst MT centre 
1.25 cm above the tib fib

Question 2

What does the amount of obliquity of the foot depend on?

Answer 2

The angle of the medial arch. If in an AP foot X-ray you angled 5 degrees then then the obliquity should be thirty degrees. Angled 10 then 45 degrees obliquity and 15 degree angulation of CR should be a 60 degree obliquity.

Question 3

What happens to the 1-2 MT bases in this X-ray?

Answer 3

The 2nd base superimposes the 1st MT base. This indicates the degree of obliquity of the foot.

Question 4

How do you know when you’ve obliqued the foot too much?

Answer 4

The MT bases overlap each other.
If you see the 4th MT tubercle in profile
The 5th proximal MT is superimposed over the 4th MT tubercle

Question 5

To keep the same relationship between the AP foot and the oblique foot, what do you keep consistent?

Answer 5

Do not change the extension of the ankle

Question 6

What joints should you see open in a obliqued foot?

Answer 6

Cuneiform-cuboid, navicular- cuboid and 2nd through 5th intermetatarsal joint spaces.

Question 7

What is the range of foot obliquity?

Answer 7

30-60 degrees