Correct Answer: B

Rationale: The correct answer is B: CT scan without contrast. A CT scan is the most useful imaging study in assessing for findings consistent with a history of abuse in this patient. CT scan is preferred for acute trauma to the head as it provides detailed images of the brain, skull, and facial bones. It can detect acute hemorrhages, fractures, or other signs of trauma. In this case, the patient's presentation with periorbital ecchymosis and facial swelling raises suspicion for traumatic injury, which can be assessed effectively with a CT scan. Radiographs (choice A) are not as sensitive as CT scans in detecting subtle fractures or soft tissue injuries in the head and face. MRI (choice C) is not typically used in acute trauma assessment and may not provide timely information needed in this case. PET scan (choice D) is not indicated for evaluating traumatic head injuries and is more commonly used for assessing metabolic and functional activity in the body.

Correct Answer: C

Rationale: The correct answer is C: Very low birth weight neonate. This designation is given to infants whose birth weight is less than 1500 grams. In this case, the neonate's weight of 1201 grams falls within the criteria for very low birth weight. Choice A is incorrect because being genetically small does not necessarily equate to low birth weight. Choice B is incorrect as low birth weight typically refers to infants weighing between 1500-2499 grams. Choice D is incorrect as extremely low birth weight pertains to infants weighing less than 1000 grams.

Correct Answer: A

Rationale: The correct answer is A: Palpation of the abdomen. To diagnose obstructed labor, palpation of the abdomen is essential to assess the position and size of the fetus, as well as the presence of uterine contractions and fetal heart rate. Tenderness in the lower abdomen may indicate other conditions, not necessarily obstructed labor. Softening of the cervix is a sign of impending labor but not specific to obstructed labor. Therefore, palpation of the abdomen is the most appropriate choice for diagnosing obstructed labor.

Correct Answer: C

Rationale: The correct answer is C: A long history of alcohol use. In this case, the patient T. S. is brain dead following a catastrophic accident. Although she had an organ donor notation, her long history of alcohol use precludes her from serving as a liver donor. Chronic alcohol use can lead to liver damage and compromise the quality of the liver for transplantation. Encephalopathy (choice A) is a potential complication of liver disease, but it does not preclude her from being a liver donor. Hepatitis C infection (choice B) and biliary cirrhosis (choice D) may affect the liver, but they do not automatically disqualify her as a donor.

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.