Someone I know from work is undergoing a Geirut. The Beit Din sent him to a hospital to have a doctor who is also a Mohel perform the MIlah. My co worker was feeling weak and is staying in the hospital over the weekend and over Shabbat. After Shabbat he will finish the process and do Tevillah. He was wondering if he is allowed to keep full Shabbat now this Shabbat.