God needs to be involved in the ministry in my daily life, blessing it so that the ultimate glory will belong to my Lord. And I want God to guide me during the procedure. So I pray for guidance when faced with a difficult choice, seeking insight about which option to take. The patient should feel God's presence in the operating room. Many patients tell me how reassuring it is to pray before surgery.
Children especially love it.
It strengthens them to know that Jesus is with them. Prayer is also an indirect witnessing tool. My patient's roommate, the nurses and other personnel hear of God's goodness and healing power. I always ask the patient's permission before praying. It's a request, not an order.