Position and anatomical landmarks
Intra-articular infiltration of the acromioclavicular joint is applied with the patient in a supine position. The midpoint of the acromion is identified. The intra-articular space is identified 2.5 cm beneath this point.
After sterile prep, 1 ml bupivacaine 0.25% with 40 mg depot corticosteroid is injected (under ultrasound guidance). There should be little resistance during injection. If the resistance is high, the tip of the needle is probably situated inside the connective tissue layers of the capsule.
- The most serious complication after the injection is infection.
- Small subcutaneous bleedings may result in a temporary increase in pain after the injection.
- Temporary worsening of the pain after the injection.