Procedure Coccygodynia Infiltration

Position and anatomical landmarks

The patient lies in a prone position on the operating table with a pillow under the pelvis, in such a way that the sacral bone is rotated in a ventral direction. Both cornu of the sacral hiatus are palpated. Thereafter, and more caudally, the sacro-coccygeal joint is marked and palpated.

Figure 1. Needle position for local infiltration of the sacrococcygeal joint: lateral view.

Procedure

After sterile preparation of the area, the needle (22-G) is inserted (using ultrasound guidance) and 4 ml bupivacaine 0.25% with 40 mg depot corticosteroid is injected near the joint capsule or into the disc of the the sacro-coccygeal joint.

Complications

  • The most serious complication after the injection is infection.
  • Small subcutaneous bleedings may result in a temporary increase in pain after the injection.
  • Local anaesthetic injection with corticosteroids always carries the risk of going through the disc and penetrating the rectum.
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