"While your husband is in a coma he will be unconscious and will not respond to voices, other sounds, or any sort of activity going on nearby" (https://kidshealth.org/en/kids/coma.html)
No, a coma is a serious condition that has nothing to do with sleep.
So does this have anything to do with sleep?
We will put Frank in the ICU to insure that he will get the help and attention he needs. In the ICU doctors, nurses, and other hospital staff members will make sure Frank gets the fluids, nutrients, and medications his body needs to stay healthy. (https://kidshealth.org/en/kids/coma.html)