Correct Answer: A

Rationale: The presenting diameter in brow presentation is the submentobregmatic diameter. This is because in brow presentation, the fetal head is partially extended, causing the forehead (bregma) to be the presenting part. The submentobregmatic diameter is the distance between the chin (mentum) and the highest point of the forehead (bregma). This diameter is crucial for successful delivery in brow presentation as it is the smallest diameter that must pass through the maternal pelvis. Summary of other choices: B: Suboccipitofrontal - This diameter is not relevant in brow presentation as it involves the back of the head. C: Occipitalfrontal - This diameter is the distance between the back of the head and the forehead, also not relevant in brow presentation. D: Mentovertical - This diameter is the distance between the chin and the vertex of the head, not the forehead.

Correct Answer: A

Rationale: The correct answer is A: Acute mitral valve regurgitation. The presence of a grade VVI systolic murmur that radiates to the midaxillary line suggests mitral valve involvement. Mitral regurgitation leads to acute onset of symptoms such as dyspnea and pulmonary congestion, indicated by coarse rales on auscultation. The murmur is loudest at the point of maximal impulse due to eccentric regurgitation jet. Acute aortic valve regurgitation (B) typically presents with a diastolic murmur. Acute cardiac tamponade (C) would present with Beck's triad and pulsus paradoxus. Acute pulmonary embolus (D) would present with sudden onset dyspnea and pleuritic chest pain.

Correct Answer: D

Rationale: The correct answer is D: Assessment of nonprostate causes of nocturia. In this case, the patient's symptoms of nocturia, urinary urgency, and post-void dribbling are not indicative of prostate enlargement. Given that the digital rectal examination revealed a normal-sized prostate with no hypertrophy, it is essential to explore other potential causes of nocturia in this patient. By assessing non-prostate causes of nocturia, such as diabetes, urinary tract infection, medication side effects, or sleep disorders, a more accurate diagnosis and appropriate treatment plan can be developed. This approach will lead to better patient outcomes compared to focusing solely on prostate-related evaluations. Option A: Administration of the AUA Symptom Scale is not the best approach in this case because the patient's symptoms are not primarily related to prostate enlargement. Option B: Laboratory assessment to include a PSA is not necessary since the digital rectal examination already indicated a normal-sized prostate with no appreciable hypertrophy. Option C: Ordering a

Correct Answer: D

Rationale: The correct answer is D: Short acting insulin. In gestational diabetes, short acting insulin is preferred as it provides immediate control over blood sugar levels after meals. This is crucial in managing the condition to prevent complications for both the mother and the baby. Therapeutic diet alone (choice A) may not be sufficient to control blood sugar levels, while long-acting insulin (choice B) may not provide the rapid response needed after meals. Oral hypoglycemics (choice C) are generally avoided in pregnancy due to potential risks to the fetus. Therefore, short acting insulin is the most appropriate therapy for managing gestational diabetes effectively.

Correct Answer: D

Rationale: The correct answer is D: A HIDA scan. A HIDA scan is the most appropriate imaging study for investigating the likely cause in this case because the patient's symptoms (abdominal pain centered on the right side just under the ribcage, tenderness in the right upper quadrant) are suggestive of a possible gallbladder issue, such as cholecystitis or biliary colic. A HIDA scan is specifically used to evaluate the gallbladder and biliary system. A: Abdominal radiographs would not provide detailed information about the gallbladder or biliary system, and are not the best choice in this scenario. B: A CT scan of the abdomen with contrast can be helpful in some situations, but it may not provide the specific information needed to evaluate the gallbladder and biliary system. C: Right upper quadrant ultrasound is a good initial imaging study for evaluating gallbladder disease, but a HIDA scan is more specific for functional assessment of