Which one of the following fetal positions is associated with intense back pain during labor?

Correct Answer: C

Rationale: The correct answer is C: Occipito-posterior. This position occurs when the baby's head is facing forward but towards the mother's spine. This position can cause intense back pain during labor because the baby's head puts pressure on the mother's lower back. Occipito-anterior (A) is the most common and ideal position for labor. Transverse position (B) is when the baby is lying sideways, which may cause prolonged labor but not necessarily intense back pain. Occipito-lateral (D) is a less common position where the baby's head is facing sideways, which may not specifically cause intense back pain.

Correct Answer: D

Rationale: The correct answer is D because in deep transverse arrest, the sagittal suture of the fetal head is typically aligned with the oblique diameter of the pelvis, causing an obstruction in the descent of the baby. This alignment leads to a difficult labor scenario where the baby's head cannot pass through the pelvis due to the mismatch in diameters. Choices A, B, and C are incorrect because they do not accurately describe the specific anatomical alignment that characterizes deep transverse arrest. Choice A refers to occipito-frontal diameter, choice B refers to sub-occipito-bregmatic diameter, and choice C mentions a face to pubis delivery, which are not the defining features of deep transverse arrest.

Correct Answer: B

Rationale: The correct answer is B: Oligohydramnios. Oligohydramnios leads to reduced volume of amniotic fluid, which can result in poor fetal movements and inadequate cushioning for the fetus. This can increase the likelihood of abnormal fetal positions like shoulder presentation. Other choices are incorrect because: A: A sub-septate uterus is a structural uterine abnormality and not directly related to shoulder presentation. C: Prematurity may lead to preterm labor but is not specifically associated with shoulder presentation. D: Multiple pregnancy can increase the risk of malpresentation but is not a direct maternal cause of shoulder presentation.

Correct Answer: C

Rationale: Rationale for choice C: 1. Excessive molding or abnormal stretching of the fetal head can indicate neonatal intracranial injury due to the trauma during birth. 2. This feature suggests possible compression or trauma to the baby's head during delivery. 3. It may lead to intracranial hemorrhage or other injuries, requiring close monitoring and medical intervention. Summary of other choices: A. An oedematous swelling resolving in 48 hours is likely a normal finding (cephalohematoma) and not specific to intracranial injury. B. Notable bleeding between the epicranial aponeurosis & periosteum may indicate cephalohematoma or caput succedaneum, not necessarily intracranial injury. D. Peripheral cyanosis is related to oxygenation and circulation, not specific to intracranial injury.

Correct Answer: D

Rationale: The correct answer is D because the main aims of an exchange transfusion procedure are to control haemolysis (process of breaking down red blood cells) and restore hemoglobin levels. This procedure involves removing the baby's blood and replacing it with donor blood to prevent complications from severe jaundice or other conditions. Choice A is incorrect because exchange transfusion does not necessarily cure haemolysis, but it helps control it. Choice B is incorrect as the procedure focuses on managing specific issues rather than removing all toxic materials. Choice C is incorrect because it does not directly address the primary goals of an exchange transfusion.