Final answer:
Placental abruption presents with abdominal pain, uterine tenderness, and vaginal bleeding, whereas uterine rupture is characterized by severe abdominal pain, cessation of contractions, fetal distress, and possible change in uterine shape. Vaginal bleeding can be less apparent in uterine rupture if blood accumulates in the abdomen.
Step-by-step explanation:
The assessment findings that differentiate a placental abruption from a uterine rupture are based on the clinical presentations and complications associated with each condition. Placental abruption, where the placenta detaches from the uterine wall before delivery, typically presents with abdominal pain, uterine tenderness, and often a port-wine colored vaginal bleeding. Uterine rupture, a rare but serious complication, may present with sudden, severe abdominal pain, a cessation of contractions, fetal distress, and a change in the shape of the uterus. Unlike placental abruption, vaginal bleeding may not be as severe with uterine rupture because the blood may be trapped within the abdominal cavity. Afterbirth is the delivery of the placenta and membranes post childbirth and is not directly related to either complication, but the examination of the expelled placenta is crucial to ensure it is intact. Notably, a retained placenta can cause postpartum hemorrhage, hence proper examination post-delivery is essential for maternal health.