Piriformis injection Flashcards
1
Q
Which transducer should be used?
A
Medium-frequency linear array or low-frequency curvilinear array
2
Q
What size needle should be used for injection?
A
22 gauge, 3.5 inch needle
3
Q
What needs to be identified prior to injection?
A
Sciative nerve which runs deep to or pierces the piriformis muscle
4
Q
Describe the course of the piriformis
A
Originates on the anterior lateral sacrum
Pass through greater sciatic foramen
Inserts on superior greater trochanter
5
Q
What injectate should be used?
A
3-4 mL of local anesthetic w/ or w/o steroid
6
Q
Describe the position of the transducer for injection
A
Axial oblique from cephomedial to caudolateral over the piriformis muscle
