abruption, humm don't know for sure, when in pregnancy? the only way we know it's an abruption is because we have transferred care. I would probably give someone I suspected having an abruption vitamin E because it can help with placental attachment. I would also give uterine relaxants, like magnesium and herbal I would give virburnum (either kind black haw or cramp bark) .
Increase mom's vitamin K intake and would even consider using a drop or 2 of oral vitamin K.
For tired uterus- methergine or a methergine/pit combo. Ice pack (maybe). feed and hydrate mom- really we want to avoid this condition - so things like belly binding in pregnancy and labor, baby's position and is mom having very strong contractions but slow progress, changing positions in labor, keep the bladder empty. Be sure to keep mom's electrolytes up and keep her fed in labor so that her body has something to burn to contract with.