When preparing for the surgery, say "I request a Most Benevolent Outcome for this surgery and may the results be even better than I can hope for or expect, thank you!"
And they you can say a Benevolent Prayer for the surgeon staff:
"I ask any and all beings to assist the doctors and nurses for this surgery today to operate to their highest peak of knowledge and professionalism, thank you."
That one you can change to fit your circumstances. When I had congestive heart failure a few years ago I requested MBO's each time and had absolutely no fear! I KNEW the results would be for the best, and when the first "procedure" of shocking my heart did not work, I KNEW that an ever better result would happen the next time. I was able to joke with the nurses and staff. The second was successful, but I was on medications which affected my memory, so they did a third procedure which was only supposed to be 80% successful. But I KNEW it would be successful, and it was. I was able to get off all the heart medications I had to be on after the second operation. You are co-creating when requesting MBO's and my Guardian Angel Theo says this is the BIG STEP of learning to be "Junior Creators in Training".