My local hospital were very familiar with the requirements so they seem to be a standard list - but do check they are the ones you need to have done, don't just use my list incase things change or your Dr has different requirements!
Hanse wanted the results of my bloodtest 10-14 days before surgery. You can't have it done too far in advance as the results need to reflect your health when you have surgery. They asked for: Blood count
INR, PTT
Creatinin
Sodium, Potassium
ALG, GGT.
These tests measure things like how fast your blood clots to ensure you won't have a more of bleeding.
You need to get the results printed out as Hanse need the numbers. For example my APTT was just outside the normal range. By having the numbers they were able to look at how slowly I might be clotting and decide if that would prevent my surgery going ahead.
I would arrange the test for say 16-14 days before surgery as they take about a day (in my area) to analyse the samples and then you'll need the GP to review and print your results for you to collect.