Figure 3.

Presentation of ultrasound-guided PRP injection technique into common extensor tendon: (A) point of skin puncture with a needle guided by ultrasound probe in sterile conditions; (B) injection of 1–2 mL of 1% lidocaine in the subcutaneous region; (C) the peppering technique with multiple needle punctures through the fascia to the periosteum; (D) PRP injection into the hypoechogenic region of ECRB. PRP—platelet-rich plasma; ECRB—extensor carpi radialis brevis; arrows—view of the needle position under ultrasound; *—hypoechogenic region of the tendon.