When I was in my JW friend's not a JW never been a JW or ever been interested in being a JW widowed mother broke her hip and my JW friend along with her JW husband insisted the Drs treat the non JW mother without blood. This pissed the Drs off to be sure, but, since the mother was in no condition to speak for herself it left the Drs in a difficult position with the next of kin relative insisting on no blood.
I told my friend she wasn't violating any witness rules by allowing her mother to have the surgery along with any necessary treatments but my friend was so repulsed by the idea of blood she said she couldn't allow it. The Drs just went around my friend and called the alternate in case of emergency numbers listed on the ladies file and this relative wasn't a JW and said hell yeah do whatever you need to - so they did while my friend wasn't at the hospital.
Incidentally the lady ended up dying a couple years later of something unrelated and the JW daughter insisted witness material and scriptures be read at her non JW memorial service with mostly non JW family and friends of the woman attending.