Please Pray for my dad!

Guys, Please keep praying for my dad. He was supposed to go home last night my mom had even paid the bill etc then noticed his blood pressure dropped...down to 74 over something. they have him on breathing treatments etc. its back up but he is admitted and in isolation since they don't know what's causing this. My aunt is a dr in Hawaii and said it could be a deep infection somewhere. She will work closely over the phone with the Dr's and if need be fly over here. Please pray that it doesn't get that far! Not only would me and mom be devastated if anything happens but my son adores him beyond words and vice versa. thanks!