It's a special post-op anaesthetic mixture that lasts a long time and reduces the post-op pain levels considerably.
My wife (ex theatre & recover nurse) made sure the anaesthetist I had (they knew each other) was going to put it in my wound. He did, it helped.
Op on the Friday, home (walking on a crutch) on the monday.
Wow thats incredible I will say to my dad to ask for it. (not for him lol)