Final answer:
The nurse should characterize this infant as macrosomic with signs of birth trauma.
Step-by-step explanation:
The nurse should characterize this infant as macrosomic with signs of birth trauma. Macrosomia refers to newborns who have a higher birth weight than average. In this case, the newborn weighs 9lb, 8oz, which is significantly larger than the average birth weight of 7.5 lb.
The marked caput succedaneum and bruising around the face, head, and shoulders are signs of birth trauma, which can occur during a forceps-assisted birth.