Carpal Tunnel Injection Flashcards
1
Q
What size needle should be used?
A
22-25 gauge needle
2
Q
Which transducer should be used?
A
High frequency linear array
3
Q
What is in the carpal tunnel?
A
Median nerve
FDS tendons
FDP tendons
FPL tendon
4
Q
What US findings suggest CTS?
A
Cross-sectional area >11 mm "Notch sign" at site of compression Athritis narrowing the space Tenosynovitis Masses Post-surgical scarring Enroaching lumbrical or flexor muscle bellies
5
Q
How much steroid and local anesthetic should be used?
A
0.5-1.0 mL steroid and 1 mL local anesthetic
6
Q
How should the patient be positioned for injection?
A
Seated or supine w/ wrist in supination and slight dorsiflexion over a rolled towel
7
Q
Describe the transducer postion
A
Short axis to the median nerve and carpal tunnel at the distal palmar crease
