Morton's Neuroma Injection Flashcards
What size needle should be used?
27-25 gauge, 1.25-1.5 inch needle
Which transducer should be used?
Medium-frequency linear array
What is a Morton’s neuroma?
Symptomatic fibrous nodule that classically develops b/w the 3rd & 4th MTP at the confluence of the medial and lateral plantar nerves
What is a Mulder’s sign?
Compressing metatarsal heads together in one hand while holding transducer with the other which can displace the neuroma causing an audible click
What size do Morton’s neuromas typically become symptomatic?
> 5 mm
How much local anesthetic and steroid should be used?
0.5 mL local anesthetic and 0.5 mL steroid
How should the transducer be positioned for needle skin entry?
Short axis over the plantar aspect of the metatarsal heads
How should the transducer be positioned when the needle is in the neuroma?
Long axis along interdigital nerve
