A 25-year-old type 1 diabetic clerk presents to the emergency room with shortness of breath and states that his blood sugar was 605 at home. You diagnose the patient with diabetic ketoacidosis. What is the expected pattern of breathing?

Correct Answer: C

Rationale: In diabetic ketoacidosis (DKA), the body is in a state of metabolic acidosis due to the accumulation of ketones in the blood. One of the compensatory mechanisms to decrease the acidity in the body is increased breathing, known as Kussmaul breathing. This type of breathing is characterized by a rapid and deep pattern to blow off excess carbon dioxide and decrease the acidity of the blood. Therefore, in a patient with DKA, you would expect to observe rapid and deep breathing.

Correct Answer: D

Rationale: A subconjunctival hemorrhage is a common and benign condition characterized by blood in the space between the conjunctiva and sclera of the eye. The condition often presents as a painless, sharply demarcated area of redness on the white part of the eye, typically without associated discharge or visual disturbances. In this case, the absence of eye pain, discharge, visual disturbances, and clear cornea make subconjunctival hemorrhage the most likely diagnosis. The history of forceful coughing with a recent cold is also consistent with the increased intraocular pressure leading to a rupture of a small blood vessel, resulting in the hemorrhage. Treatment is not usually required as the condition is self-limiting and resolves on its own over time.

Correct Answer: C

Rationale: In the context of visual acuity, the numbers in the ratio 20/100 represent a comparison between the patient's vision and normal vision. Specifically, a visual acuity of 20/100 means that the patient can see at 20 feet what a person with normal vision can see at 100 feet. This indicates that the patient's vision is reduced, as she needs to be closer to see the same level of detail compared to someone with normal vision.

Correct Answer: B

Rationale: Given the information provided about Jim's recent separation from his wife after a long marriage, coupled with the fact that he still experiences early morning erections, the likely cause for his sexual function difficulties is psychological issues. Separation, divorce, or relationship problems can have a significant impact on a person's sexual function due to emotional stress, anxiety, depression, or other mental health issues. In Jim's case, the presence of early morning erections suggests that there may not be a physiological issue like decreased testosterone levels, abnormal circulation, or impaired neural innervation. Instead, the situation seems more related to his emotional state and psychological well-being following the separation. It would be advisable for Jim to seek counseling or therapy to address these psychological factors affecting his sexual function.

Correct Answer: D

Rationale: The presence of a palpable pulsatile abdominal mass in a patient like Mr. Martin, who is a smoker and at risk for vascular diseases, is concerning for an abdominal aortic aneurysm (AAA). Immediate referral to a vascular surgeon is essential for further evaluation and management. AAA can be a life-threatening condition if left untreated, as it can lead to rupture and severe internal bleeding. Therefore, prompt specialist evaluation and monitoring are crucial in such cases. Waiting for 3 or 6 months for reevaluation could potentially lead to a delayed diagnosis and increase the risk of complications. Abdominal ultrasound is typically the diagnostic test of choice to confirm the presence and size of the aneurysm.

Correct Answer: B

Rationale: Even after a unilateral mastectomy, women should continue to self-examine and have regular clinical examinations for any signs of recurrence or new masses. It is important to closely monitor the surgical scar area for any changes or abnormalities, as breast cancer can still occur in the remaining breast tissue. Regular breast examinations remain important in the early detection of any potential issues, even after mastectomy.

Correct Answer: C

Rationale: The symptoms described, including decreased air movement, high-pitched whistling (wheezing) on expiration in all lobes, and resonant lungs on percussion, are characteristic findings of asthma. Asthma is a chronic respiratory condition characterized by airway inflammation, bronchoconstriction, and increased mucus production, leading to symptoms like wheezing, shortness of breath, chest tightness, and cough. The presence of wheezing, particularly on expiration, is a classic sign of asthma. In contrast, spontaneous pneumothorax would typically present with sudden chest pain and shortness of breath, accompanied by hyperresonant percussion notes due to trapped air in the pleural space. COPD, a chronic lung condition characterized by progressive airflow limitation, would often present with symptoms such as chronic cough, sputum production, and dyspnea on exertion. Pneumonia is an infection of the lung tissue,

Correct Answer: B

Rationale: The patient described is most likely suffering from an external hemorrhoid. External hemorrhoids are swollen veins located near the opening of the anus, often resulting from increased pressure in the rectal area. The presence of a swollen bluish ovoid mass containing a blood clot is characteristic of an external hemorrhoid. The pain experienced during digital rectal examination further supports this diagnosis, as external hemorrhoids are typically painful when touched. In this case, there are no palpable masses within the anus or rectum, ruling out anorectal cancer or internal hemorrhoids. Anal fissures are small tears in the lining of the anus, which would present differently from the described swollen mass with a blood clot.

Correct Answer: C

Rationale: The target heart rate during physical activity is typically calculated as a percentage of maximum heart rate, which is estimated using the formula: 220 - age. For a 30-year-old individual, the estimated maximum heart rate would be 190 beats per minute. Exercising at 60-70% of the maximum heart rate is usually recommended for moderate-intensity physical activity. For this individual, the target heart rate zone would be approximately 114-133 beats per minute. Therefore, achieving a heart rate of 120 beats per minute would fall within the target range and indicate an appropriate level of exertion for effective physical activity.