Final answer:
For a client at term gestation diagnosed with abruptio placentae, the nurse should prepare for immediate cesarean delivery due to the life-threatening risk for both mother and baby.
Step-by-step explanation:
When an ultrasound performed on a client at term gestation indicates that abruptio placentae is present, the nurse should prepare the client for the anticipated prescription, which in this case would be preparing for immediate cesarean delivery. Abruptio placentae is a serious condition where the placenta detaches from the uterine wall prematurely, and it can be life-threatening for both the mother and the baby. Therefore, immediate delivery of the baby is often necessary, typically via a cesarean section, to ensure the safety of both.