Correct Answer: B

Rationale: The correct answer is B (3000 ml) because polyhydramnios is defined as an excessive amount of amniotic fluid, typically exceeding 2000-2500 ml. A level of 3000 ml is commonly used as a cutoff point for clinical diagnosis. Choices A, C, and D are incorrect because they fall below the threshold typically considered diagnostic for polyhydramnios. Answer A (1500 ml) is too low, while choices C (1900 ml) and D (2500 ml) are below or at the lower end of the range typically associated with polyhydramnios. Therefore, the most appropriate threshold for diagnosing polyhydramnios is when the amount of amniotic fluid exceeds 3000 ml.

Correct Answer: C

Rationale: The presence of a turtle sign during delivery is indicative of shoulder dystocia. This occurs when the baby's shoulders get stuck behind the mother's pelvic bones during delivery, leading to difficulty in delivering the baby's shoulders. The turtle sign refers to the retraction of the baby's head back into the birth canal after delivery of the head, resembling a turtle retracting into its shell. This sign is a clear indicator of shoulder dystocia. Choices A, B, and D are incorrect because prolonged labor, occipito-posterior position, and shoulder presentation do not specifically involve the retraction of the baby's head like in shoulder dystocia.

Correct Answer: A

Rationale: The correct answer is A: Unstable lie. After 36 weeks of gestation, the fetal lie should typically be consistent. An unstable lie refers to a situation where the fetal lie keeps changing position, indicating a potential complication. This can lead to difficulties during labor and delivery. Summary: B: Compound lie - Refers to a situation where the fetus is in an abnormal position, such as breech or transverse, alongside another part of the body presenting first. C: Multiple lie - Not a recognized medical term. D: Transverse lie - Refers to a situation where the fetus is positioned horizontally across the uterus, which can complicate delivery.

Correct Answer: D

Rationale: The correct answer is D: Compound. In compound presentation, a hand or foot is alongside the presenting part, usually the head. This can complicate the delivery process. A: Footling presentation means the foot presents first. B: Transverse presentation is when the baby is lying sideways. C: Cephalic presentation is normal, with the head presenting first. In this scenario, D is the correct answer as it specifically describes the situation where a hand or foot is alongside the presenting part.

Correct Answer: B

Rationale: The correct answer is B (GCS of 3 to 8 and hypotension) because hypotension is not a specific indication for intracranial pressure (ICP) monitoring according to the Brain Trauma Foundation guidelines. The rationale is that hypotension is a systemic issue affecting overall perfusion, whereas ICP monitoring is specifically for assessing intracranial dynamics. A, C, and D are incorrect choices because they all involve conditions that could potentially indicate increased intracranial pressure and the need for monitoring. A) Abnormal head CT indicates structural brain injury, C) age > 40 is a risk factor for poor outcomes after traumatic brain injury, and D) bradycardia can be a sign of increased ICP affecting brainstem function. Therefore, these conditions warrant ICP monitoring according to guidelines.