Time taken for results will vary, but make sure you ask them how long and hiw you will be contacted.
I was told it would be within two weeks and that I'd be informed as soon as they knew anything by telephone.
Three weeks later I was in bits and rang them, which seriously pixxed off the medical secretary as I was interrupting her system. She told me I'd been discharged with no further explanation.
Not the best way to impart such good news.
Best of luck with the procedure.
Mick