We always do this operation with the patient awake. We normally use a tourniquet but can do the operation without if necessary.
This sequence of photos shows the steps in the operation.

Markings for endoscopic surgery to show the safe area.

Starting to inject the local anaesthetic

Last few drops of local being injected.
The clock starts

The incision.

The scope in position

The view inside the wrist

7 minutes later. The final dressing!
