Hello and welcome to Public Forum
Before giving answer to you query I want to know that:
1. Is your father presently conscious, semi-conscious or unconscious?
2. If he is conscious, is he is moving all the limbs
and speaking properly?
3. To what time period he is unconscious before the procedure?
4. What is his age and physical activity before the incident?
5. Any other previous history like Diabetic, Kidney
disease, CVA etc.?
I want answer to the above said query before telling you the recovery time and prognosis. You can ask you doctor about the prognosis and whether there is any damage to the brain clinically or not? CT scan
of head can be done to rule out this. Hope this will help you.