Medical procedures and Islam Question?

Hi-I'm a nursing student and I was watching a video on You Tube of a surgical procedure that took place in Egypt. It made me think of something.

I know that under the rules of Islam that people are allowed to take care of themselves and others and avoid any harm, like a pregnant woman or diabetic doesn't have to fast during Ramadan and a doctor can ignore the call to prayer if someone needs help.

But do doctors and surgeons schedule the procedures that they need to perform around the prayer times? I don't mean in an emergency. I mean when something is prescheduled? Is that how hospitals in Islamic countries do scheduling for procedures?

I'm just wondering so I would appreciate your answers.