Been through this recently with my parents. In my dad's case, they did a separate procedue before the hip surgery, placing a balloon in the leg vein that could be deployed to reduce bloodflow to the hip and thus reduce bleeding.
This kind of sounds good until you realize they did a whole unnecessary procedure and shut off blood flow throughout the whole leg which was entirely unnecessary.
He came through the surgery well and is so sure that he had a greater advantage than other patients, but I don't think so considering a whole extra procedure and its risks.
In my mother's case it was a trauma and she lost a lot of blood. She was extremely weak and it increased her recovery time immensely. The doctors told her this was the result of refusing blood and she was angry with them because she believed the Hospital Liason Committee had a treatment plan that was better. When the doctor told her that those treatments were unsuitable for acute blood loss of trauma, she told them off and thought them to be stupid. She eventually got them to agree to give her iron.
Jws are so uneducated about this and the HLC uses bad science and pushes inapropriate treatment.
But, she left the hospital sure that the JW way was superior.