What is it?

Hydrodilatation is a treatment for frozen shoulder (adhesive capsulitis). It reduces inflammation and stretches the shoulder joint to improve pain and movement.

Preparation

• Bring prior relevant CT or MRI scans if done elsewhere.
• Inform us if you take blood thinners; some must be stopped 5–7 days before.
• Arrange someone to drive you home.

Risks

This is a safe and commonly performed procedure. Temporary flushing or rash may occur. Steroids may affect blood sugar levels in diabetics. Rare risks include infection (<0.1%) and bleeding.

Procedure

The procedure takes about 15 minutes and is performed under CT guidance. Local anaesthetic is used before fluid (contrast, steroid, anaesthetic, and saline) is injected to stretch the joint capsule. Tightness or pressure in the shoulder or arm is common.

Aftercare

Mild soreness is common. Temporary pain relief may occur from the anaesthetic. Do not drive for the rest of the day.

Effectiveness

Pain relief and improved movement may last weeks to years. Response varies between individuals, and repeat treatment is occasionally required.