Need advice

I know that i have sleep apnea, been waking up gasping lately.  I am waiting fir delivery of home sleep study equip. And have egd scheduled next week.  Should i call and put off the egd until i finish sleep study and begin cpap?  I'm afraid of the twilight.

Ok, I have had the EGD now, so I can answer my own question! Lol!  Sleep apnea DOES effect the testing.  I warned them that I was sure I had apnea.  sure enough, they started the meds and apnea immediately started, so they stopped the meds.  I was given choice to procede with out meds, or re-schedule with anesthesia present.  I chose to continue......that was interesting!   Next time, i think we will schedule anesthesia.