A patient who was admitted to the delivery room undergoes an ultrasound, which reveals that the sacrum is the presenting part; the lie is longitudinal, with both the hips and knees in flexion. Which describes this fetal presentation?
Correct Answer: C
Rationale: The correct answer is A: Cephalic. In this presentation, the sacrum is the presenting part, indicating the baby is head down, which is characteristic of a cephalic presentation. Additionally, the lie is longitudinal, further supporting the cephalic presentation. The flexion of both hips and knees is also consistent with the normal positioning of a baby in the cephalic presentation.
Summary of other choices:
B: Complete breech - In a complete breech presentation, the baby is bottom down with both hips and knees flexed, but the sacrum would not be the presenting part.
C: Frank breech - In a frank breech presentation, the baby's buttocks are the presenting part with the legs extended and the feet near the head.
D: Footling breech - In a footling breech presentation, one or both feet are the presenting part, with the hips and knees extended, not flexed as described in the scenario.