All practice questions

Identify the most appropriate definitive surgical or procedural intervention for each of the described male genitourinary pathologies.

Match each clinical presentation of an acute orthopedic injury to its most likely associated neurological examination deficit.

For each of the patients below, identify the most appropriate clinical preventive action based on current United States Preventive Services Task Force (USPSTF) guidelines.

Match each patient safety and quality improvement tool with the clinical scenario or description that best illustrates its appropriate application.

A 52-year-old woman is evaluated on postoperative day 10 following an exploratory laparotomy and extensive lysis of adhesions for recurrent small bowel obstruction. Over the past 48 hours, she has developed drainage of feculent fluid through the mid-portion of her healing midline incision. The output is currently measured at 900 mL/day. She is afebrile with a heart rate of 88/min and blood pressure of 110/70 mmHg. Her abdomen is soft and non-tender, but the skin surrounding the drainage site is rapidly becoming severely erythematous and excoriated. Arrange the following management steps in the standard evidence-based chronological sequence for the treatment of a newly diagnosed high-output enterocutaneous fistula, proceeding from the immediate phase to definitive care.

Review the following five clinical vignettes describing patients with occupational or environmental exposures. Match each patient presentation (left) with its corresponding underlying pathophysiologic mechanism, characteristic diagnostic finding, or specific complication (right).

A 62-year-old woman is admitted to the hospital with severe pelvic pain and is diagnosed with advanced endometrial cancer. A root cause analysis of her outpatient records reveals that she presented to her primary care clinic 10 months ago with an episode of postmenopausal vaginal bleeding. At that time, a locum tenens (temporary) physician ordered a transvaginal ultrasound, which revealed an endometrial thickness of 6 mm. Because the ordering physician had left the practice by the time the scan was completed, the electronic health record (EHR) automatically routed the report to an unassigned "general results" inbox. Six weeks later, a medical assistant bulk-archived all messages in that inbox to clear system space, assuming the results had been addressed by the clinical team. Consequently, the patient was never contacted for an endometrial biopsy. According to the Swiss Cheese model of accident causation, which of the following best represents a latent condition contributing to this adverse event?

A 71-year-old man is brought to the emergency department after collapsing at home. He is unresponsive, and a CT scan of the head reveals a massive, irreversible intracranial hemorrhage. The neurology team determines that he will not regain consciousness. The patient currently requires intubation for airway protection. The patient's adult son is at the bedside and tearfully insists that his father be intubated and placed on mechanical ventilation. However, the medical record contains a legally valid advance directive executed two years ago, designating the patient's long-time neighbor as his healthcare proxy. The neighbor arrives at the hospital, presents a copy of the directive, and states that the patient strongly valued quality of life and would never want to be kept alive on a ventilator, requesting comfort measures only. Which of the following is the most appropriate next step in management?

A 74-year-old man develops progressive, massive abdominal distension 4 days after undergoing a coronary artery bypass graft. He reports mild nausea but no significant abdominal pain. His vital signs are within normal limits. Physical examination reveals a markedly distended, tympanitic abdomen with no guarding or rebound tenderness. Laboratory studies show normal potassium and magnesium levels. An abdominal radiograph reveals a diffusely dilated colon with the cecum measuring 11.5 cm in diameter, without evidence of a transition point or pneumoperitoneum. Assuming each subsequent intervention fails to resolve the patient's condition, arrange the following management steps in the correct sequential order.

Match each occupational or environmental exposure scenario with its underlying pathophysiologic mechanism and the most appropriate specific intervention.

Match each patient presenting to the primary care clinic for a routine health maintenance visit with the highly recommended (USPSTF Grade A or B) preventive screening service most specifically indicated for their demographic and risk profile.

A 32-year-old healthy woman presents to the clinic for a routine health maintenance examination. She has no significant past medical history. During the visit, she expresses concern about her cancer risk because her mother was diagnosed with bilateral breast cancer at age 46, and her maternal aunt was diagnosed with ovarian cancer at age 52. The patient has not undergone any previous genetic evaluation. According to the United States Preventive Services Task Force (USPSTF) guidelines, arrange the following steps in the correct clinical and chronological sequence for the management of this patient's familial cancer risk, from the immediate next step in the primary care clinic to long-term management.

A 72-year-old woman with a history of persistent atrial fibrillation and nonadherence to her oral anticoagulant therapy presents to the emergency department with sudden, excruciating pain in her right leg that began 3 hours ago. On physical examination, the right lower extremity is pale and cool to the touch. No pulses are palpable distal to the femoral artery. She reports numbness over the dorsum of her right foot and is unable to actively dorsiflex her toes. Arrange the following interventions in the most appropriate chronological sequence for the optimal management of this patient.

A large healthcare network is evaluating the performance of a fecal immunochemical test (FIT) for colorectal cancer screening. Epidemiological data indicates that the prevalence of undetected colorectal neoplasia is $5\%$ in patients aged 50 to 75 years and $1\%$ in patients aged 45 to 49 years. The FIT has a sensitivity of $80\%$ and a specificity of $90\%$, and these intrinsic test characteristics remain constant across both age groups. If the screening program is expanded from the older age group to include the 45 to 49 year old cohort, which of the following accurately describes the expected predictive values of the FIT in the younger cohort compared to the older cohort?

A team of clinical researchers is investigating the efficacy of a new intensive lifestyle modification program on glycemic control in patients with newly diagnosed type 2 diabetes. In a study of $144$ patients, the mean reduction in hemoglobin A1c (HbA1c) after six months is $1.2\%$. The sample standard deviation for this reduction is $0.6\%$. Assuming a normal distribution of the data and using a critical z-score of $1.96$ for the $95\%$ confidence level, what is the upper bound of the $95\%$ confidence interval for the mean reduction in HbA1c in this population? (Express your answer to three decimal places.)

A 15-year-old boy is brought to the emergency department by his parents due to the sudden onset of excruciating left-sided scrotal pain that woke him from sleep 3 hours ago. The pain is constant and accompanied by nausea and one episode of non-bilious emesis. He reports no dysuria, hematuria, urethral discharge, or recent flank pain. His temperature is $37.2^\circ\text{C}$ ($99.0^\circ\text{F}$), blood pressure is $128/82\text{ mmHg}$, and heart rate is $110\text{ /min}$. On physical examination, the left hemiscrotum is edematous, erythematous, and exquisitely tender to palpation. The left testicle is positioned higher than the right and lies horizontally. The cremasteric reflex is absent on the left side but intact on the right side. Which of the following is the most appropriate next step in management for this patient?

An unaccompanied 16-year-old high school student is seen at an outpatient adolescent health clinic for painful urination and purulent vaginal discharge of three days' duration. Point-of-care testing confirms a diagnosis of Neisseria gonorrhoeae cervicitis. Following administration of appropriate antimicrobial therapy, the patient requests a prescription for daily oral contraceptive pills. During the subsequent psychosocial assessment, the patient becomes visibly distressed and admits to experiencing profound hopelessness. She discloses a specific and detailed plan to consume a lethal overdose of her father's prescription opioid medication later this evening. She adamantly refuses voluntary psychiatric hospitalization and insists that her parents must not learn anything about today's clinic visit. Which of the following disclosures of the patient's protected health information may the physician legally and ethically make without her explicit consent? (Select all that apply)

A 32-year-old woman comes to the emergency department with right wrist pain. She states that she tripped and fell down a flight of stairs at home. Radiographs confirm a closed fracture of the right distal radius. During the physical examination, the physician notes several large bruises on her back, proximal arms, and thighs in various stages of healing. After ensuring the patient's husband leaves the room to fill out paperwork, the physician gently asks about the bruises. The patient tearfully admits that her husband frequently physically assaults her and pushed her down the stairs today. She pleads, "Please do not contact the police or tell anyone. If he finds out I told you, he will kill me." The patient is alert, oriented, and demonstrates full decision-making capacity. Which of the following is the most appropriate next step?

A biotechnology firm has developed a novel non-invasive stool DNA assay for colorectal cancer. To validate the assay's performance, a study is conducted in a high-risk gastrointestinal clinic among patients presenting with hematochezia. In this validation cohort, the prevalence of colorectal cancer is $50\%$. The assay demonstrates a sensitivity of $95\%$ and a specificity of $95\%$.

Following regulatory approval, a large health maintenance organization (HMO) decides to implement this stool DNA assay as a primary screening tool for all asymptomatic, average-risk members aged 50 to 75. Epidemiological data indicates that the point prevalence of colorectal cancer in this average-risk HMO population is $5\%$.

Assuming the test's intrinsic performance characteristics remain constant across populations, what is the approximate probability that an average-risk HMO member with a positive stool DNA assay result actually has colorectal cancer?

Match each neurosurgical emergency or traumatic brain injury with its characteristic pathophysiologic mechanism and classic neuroimaging findings.