So glad loving care and common sense prevailed for your mum.
My friend who is a witness went through a similar situation when her mother needed a transfusion. The JW family requested erythropoitin and the hospital didn't said they didn't stock it as it is too expensive and they would have to order it in, which would take days. They ended up using whole blood and the lady was ok.
But what really pissed me off was that my friend's mother wasn't even one of JWs, it was my friend who didn't want her to have blood!!