נסיעה למשמרת בבית חולים בשבת

Hi,

I have graduated medical school and will begin my residency next

week. I will be required to go to the hospital on Shabbat. Can you please

tell me the best way to get to the hospital. By taxi (driven by goy) or

driving myself. Also what is the halacha about coming home from the

hospital on shabbat in order to go to shul and have a shabbat meal with my

family. Does is make a difference if the majority of patients are

Jewish? Please include a sephardic opinion if you have one available

Thank you,