The purpose of Institutional Review Boards, IRB, is to protect patients, especially vulnerable patients such as children. To quote the FDA
the clinical investigation may proceed only if: The IRB finds and documents that the clinical investigation presents a reasonable opportunity to further the understanding, prevention, or alleviation of a serious problem affecting the health or welfare of children…
When it comes to pseudo-medicine they fail. All the time. I can see no way that acupuncture could ever meet that criteria. Especially for post-operative pain.