Have the surgeon go to www.ajwrb.org. Show the surgeon the allowed fractions. Also, tell the surgeon that "current therapy" is allowed. It's, basically, cell tagging. One's blood is taken out of hte body, mixed with chemicals in a separate location/building/room, and then later retransfused into the body hours later. Jehovah blesses this, but doesn't bless whole blood. Jehovah blesses hemoglobin, which is 99.9% of the red blood cell, but doesn't allow packed, washed fred blood cells.
The words "current therapy" and "fractions" are both made up by the Society. Show this to the surgeon so he might be able to talk this out with the parent.