![]() ![]() This population of newly positive patients with PSA levels between 2.0 and 4.1 ng/mL will have a higher proportion of false positive results compared to the population of patients with a PSA > 4.1 ng/mL. If the threshold is lowered to 2.0 ng/mL, some patients who were previously considered negative will be considered positive. Pulmonary function testing classically reveals decreased FEV1:FVC ratio ( 4.1 ng/mL were considered a positive result. Breathing through pursed lips is performed in order to prevent expiratory alveolar collapse (auto-PEEP). Over time patients may develop severe hyperinflation and a barrel chest. Patients may experience shortness of breath and dyspnea on exertion/at rest. This causes increased alveolar collapse on expiration, air trapping and hyperinflation, impaired ventilation, and increased dead space, leading to hypoxemia and hypercapnia. E- Emphysema is a component of chronic obstructive pulmonary disease characterized by loss/damage of alveolar elastin and lung parenchyma due to a protease/antiprotease imbalance.This patient is at risk for the development of this condition based on her history of type 2 diabetes mellitus. A vaginal smear reveals the presence of normal vaginal epithelium and pseudohyphae, confirming the diagnosis of vaginal candidiasis. Physical exam reveals edematous, erythematous vaginal mucosa with white discharge, suggestive of a candidal infection. A- This patient has vaginal pain, pruritus, and dyspareunia.Based on this, 50% of individuals will have leukocyte counts greater than 7500 and 50% will have leukocyte counts less than 7500. In this example, the mean leukocyte count is 7500 cells/mm3. D- For a normal distribution of data, mean (average) is the most reliable measure of central tendency.Severe acute kidney injury can be lethal if not properly managed, although the question states that this patient’s death was secondary to a cardiac arrhythmia, likely due to damage sustained from ischemia during cardiac arrest. This is not uncommon after several weeks. Most patients with ATN will experience tubular re-epithelialization and spontaneous full recovery. Two weeks after his initial cardiac arrest, the oliguria and azotemia resolved, representing the recovery of acute tubular necrosis. The diagnosis of ATN is supported by his oliguria, azotemia, and urinary granular casts. This was most likely due to severe renal ischemia due to impaired cardiac output. E- Six weeks ago, this patient developed acute renal failure and ischemia-induced acute tubular necrosis (ATN) in the setting of cardiac arrest due to underlying coronary artery disease.The lower end of the confidence interval is thus 130 – (1.96 x 5), which equals 120.2, and the higher end of the confidence interval is 130 + (1.96 x 5) which equals 139.8. B- The formula for a 95% confidence interval for data that follow a normal distribution is x̅ +/- (1.96 x Standard Error), where x̅ is the mean.Question banks are regularly updated so that they are similar to the latest exams. Questions may be taken as a self-paced exam, or you may opt to view them in a timed session like the actual board exams. Questions are arranged in topical sections, and you may view questions by section or in a randomized way which combines all of the sections. Immune System, Blood & Lymphoreticular System.Pregnancy, Childbirth, Female Reproductive System, and Breast.Communication/Professionalism/Systems-based Practice & Patient Safety.General Principles of Foundational Science.Renal/Urinary and Male Reproductive Systems.The USMLE Step 3 question bank follows the exam content outline for the Federation of State Medical Boards (FSMB) and National Board of Medical Examiners® (NBME®) USMLE® Step 3 Exam. This exam is the third step of the United States Medical Licensing Examination (USMLE). Topics covered include: These questions focus on challenging content, simulating the most difficult questions on the exam. It includes more than 1450 difficult USMLE Step 3 board review practice questions with detailed explanations for both correct and incorrect responses. This is a test question bank on the BoardVitals platform. ![]()
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