Once you are done w/ ur medical exam you can check w/ the medical commission at least after 3 working days. Just show your receipt number or passport copy at the male counter section and you'll get to know if its ready or not. For a medical employees it usually takes about 2 wks to have the results done due to other test
(e.i. creatinine test) that has to be sent to HMC for investigations.

In your case, you are only required to undergo blood test(HIV) & Chest X-ray(PTB), so i think it wont take long that much. Dont you have mandoop/representative for your company? he is supposed to follow up all these things and you can always check w/ him.
Good Luck!