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Patient Management

2074 questions

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Question 1001Question →

A 66-year-old woman is admitted to the hospital with intractable nausea, vomiting, and diffuse, crampy abdominal pain. She has a history of advanced ovarian cancer with extensive peritoneal carcinomatosis. Her last bowel movement was 5 days ago. Temperature is 37.1°C (98.8°F), blood pressure is 105/65 mm Hg, pulse is 110/min, and respirations are 18/min. The abdomen is markedly distended and tympanic, with high-pitched bowel sounds. A CT scan of the abdomen reveals multifocal complete small bowel obstructions with several transition points.

The surgical and oncology services evaluate the patient and determine she is not a candidate for surgical intervention or further chemotherapy. Following a goals-of-care discussion, the patient and her family elect to transition to a comfort-focused palliative approach. A nasogastric tube was placed in the emergency department, which currently drains 800 mL of bilious fluid daily. The patient is experiencing severe distress from the nasogastric tube and explicitly requests its removal. She is currently receiving a transdermal fentanyl patch and as-needed intravenous morphine, which provide partial relief of her pain.

After the nasogastric tube is removed, which of the following is the most appropriate next step in the pharmacologic management of this patient's symptoms?

Show answer & explanation

Answer: Initiate intravenous octreotide and dexamethasone

Answer

Initiate intravenous octreotide and dexamethasone
In patients with complete malignant bowel obstruction who are not surgical candidates and wish to avoid nasogastric intubation, medical management focuses on reducing gastrointestinal secretions and peritumoral edema. Octreotide (a somatostatin analog) significantly decreases the active secretion of gastric, pancreatic, and intestinal fluids, thereby reducing intraluminal volume, distension, and vomiting. Corticosteroids such as dexamethasone act synergistically by reducing peritumoral inflammatory edema, which can sometimes partially relieve the obstruction, while also providing independent antiemetic effects.

Step-by-Step Solution

1
Identify the patient's primary clinical issue and goals of care.
The patient has an inoperable, complete, multifocal malignant bowel obstruction (MBO) and has transitioned to comfort-focused care. She strongly desires the removal of her nasogastric tube.
Establishing the physiologic limitations (inoperable obstruction) and patient values (comfort, no NGT) dictates the boundaries of available medical therapies.
2
Determine the pathophysiologic drivers of the patient's symptoms.
The nausea, vomiting, and distension are driven by the accumulation of several liters of normal daily gastrointestinal secretions upstream of the obstruction, exacerbated by peritumoral inflammatory edema.
Targeting the source of the fluid and inflammation is required once mechanical decompression (NGT) is removed.
3
Select the appropriate pharmacologic agents to address the pathophysiology.
Octreotide and dexamethasone are selected.
Octreotide (a somatostatin analog) potently inhibits the secretion of gastric, pancreatic, and intestinal fluids. Dexamethasone reduces peritumoral inflammatory edema and has independent antiemetic properties.
4
Exclude contraindicated therapies.
Prokinetics (metoclopramide), enteral feeding, and laxatives are excluded.
These interventions either force motility against a fixed obstruction (risking perforation and worsening pain) or add unwanted volume to an already obstructed gastrointestinal tract.

Key Concept

Medical management of inoperable malignant bowel obstruction in palliative care relies on decreasing gastrointestinal secretions (octreotide) and reducing peritumoral edema (corticosteroids) while strictly avoiding prokinetics.
Question 1002Question →

A 66-year-old male presents to his primary care physician for an annual wellness visit. He has a history of essential hypertension that is well-controlled with amlodipine. He reports feeling well and has no acute complaints. His social history is notable for smoking 1 pack of cigarettes per day from age 18 to 30, after which he completely quit. He drinks alcohol occasionally and exercises three times a week.

Review of his preventive care records reveals the following:
- Screening colonoscopy at age 60 was normal.
- Fasting lipid panel and plasma glucose levels obtained last year were within normal limits.
- He received the 20-valent pneumococcal conjugate vaccine (PCV20) at age 65.
- He completed the two-dose recombinant zoster vaccine series at age 50.
- He received a Tdap booster 3 years ago and his annual influenza vaccine 2 weeks ago.

The patient has never had any abdominal imaging. Vital signs today show a blood pressure of 122/78 mm Hg122/78 \text{ mm Hg}, heart rate of 72/min72/\text{min}, and a body mass index of 24 kg/m224 \text{ kg/m}^2. Physical examination is unremarkable.

Which of the following is the most appropriate next step in this patient's preventive care?

Show answer & explanation

Answer: Order an abdominal duplex ultrasound

Answer

Order an abdominal duplex ultrasound
The correct action is to order an abdominal duplex ultrasound. The patient is a 66-year-old male with a history of smoking (12 pack-years, which easily exceeds the threshold of 100 lifetime cigarettes). The USPSTF gives a Grade B recommendation for a one-time screening for abdominal aortic aneurysm (AAA) with ultrasonography in men aged 65 to 75 years who have ever smoked. Since he has never had abdominal imaging, this screening is strongly indicated during his wellness visit.

Step-by-Step Solution

1
Analyze the patient's demographic profile and medical history.
The patient is a 66-year-old male with a 12 pack-year smoking history who quit at age 30.
Age, biological sex, and smoking history are critical determinants for USPSTF screening recommendations.
2
Evaluate the need for abdominal aortic aneurysm (AAA) screening.
The patient meets the criteria for a one-time AAA screening.
The USPSTF recommends a one-time screening with ultrasonography for men aged 65 to 75 years who have ever smoked (defined as at least 100 cigarettes in a lifetime).
3
Review the patient's prior preventive care to rule out other interventions.
His colonoscopy is not due for another 4 years, his pneumococcal vaccination is complete with PCV20, and he does not meet the pack-year or timeframe criteria for low-dose CT lung screening.
Confirming that no other screening or immunization is currently due ensures that the AAA ultrasound is the uniquely correct next step.

Key Concept

The USPSTF recommends a one-time screening for abdominal aortic aneurysm (AAA) with ultrasonography in men aged 65 to 75 years who have a history of smoking.
Question 1003Question →

During a scheduled visit to the anticoagulation clinic, a 67-year-old man with a mechanical mitral valve replacement undergoes point-of-care testing, which reveals an International Normalized Ratio (INR) of 7.4. He takes warfarin 5 mg daily, and his past INR results have consistently been well-controlled between 2.5 and 3.5. Four days ago, an urgent care physician prescribed a course of trimethoprim-sulfamethoxazole for acute cystitis. The patient notes that his dysuria has resolved. He explicitly denies experiencing hematuria, epistaxis, gingival bleeding, black tarry stools, or new bruising. Vital signs include a blood pressure of 128/78 mmHg and a heart rate of 76/min. Physical examination shows no evidence of petechiae, ecchymoses, or focal neurologic deficits.

Which of the following is the most appropriate next step in the management of this patient?

Show answer & explanation

Answer: Omit the next 1 to 2 doses of warfarin and recheck the International Normalized Ratio in 24 to 48 hours

Answer

Omit the next 1 to 2 doses of warfarin and recheck the International Normalized Ratio in 24 to 48 hours
The most appropriate next step in monitoring and treatment evaluation for this patient is to withhold the next 1 to 2 doses of warfarin and recheck the International Normalized Ratio (INR) in 24 to 48 hours. According to consensus guidelines, patients with an INR between 4.5 and 10.0 who exhibit no evidence of clinically significant bleeding should be managed by simply omitting 1 to 2 doses of warfarin. Routine use of vitamin K (phytonadione) is explicitly not recommended in this range due to the risk of over-reversal and subsequent thromboembolism, which is particularly dangerous in a patient requiring anticoagulation for a mechanical mitral valve (target INR 2.5 to 3.5). Once the INR approaches the therapeutic range, warfarin can be resumed at an adjusted dose.

Step-by-Step Solution

1
Evaluate the patient's current INR level and clinical bleeding status.
The patient has an INR of 7.4 with absolutely no signs or symptoms of clinical bleeding.
The presence of bleeding and the absolute INR value dictate the urgency and method of warfarin reversal.
2
Identify the etiology of the supratherapeutic INR.
The recent addition of trimethoprim-sulfamethoxazole.
Trimethoprim-sulfamethoxazole is a potent inhibitor of CYP2C9, which decreases warfarin metabolism and leads to a rapid increase in INR.
3
Apply evidence-based guidelines for managing a supratherapeutic INR without bleeding.
The correct management for an INR between 4.5 and 10.0 without bleeding is to withhold 1 to 2 doses of warfarin.
Routine administration of vitamin K is not recommended in this specific range because it risks over-correcting the INR and predisposing the patient to thromboembolic events, especially with a mechanical heart valve.

Key Concept

Management of supratherapeutic INR on warfarin therapy
Estimated Time:1m 15s
Question 1004Question →

A 68-year-old man comes to the clinic for routine monitoring of his anticoagulation therapy. He has a history of nonvalvular atrial fibrillation and has been taking warfarin for the past 2 years with a stable target International Normalized Ratio (INR) between 2.0 and 3.0. Last week, he was prescribed a 7-day course of trimethoprim-sulfamethoxazole for an uncomplicated urinary tract infection. The patient reports feeling well and denies any bruising, hematuria, melena, or other signs of bleeding. His vital signs are within normal limits. Today, his laboratory results show an INR of 5.4. Which of the following is the most appropriate next step in the management of this patient?

Show answer & explanation

Answer: Omit the next 1 to 2 doses of warfarin and recheck the INR in 1 to 2 days

Answer

Omit the next 1 to 2 doses of warfarin and recheck the INR in 1 to 2 days
The correct approach for a patient with an INR between 4.5 and 10.0 and no evidence of bleeding is to omit the next 1 to 2 doses of warfarin, monitor the INR closely, and resume therapy at an appropriately adjusted dose once the INR falls back into the therapeutic range. This patient's supratherapeutic INR is a direct result of a pharmacokinetic drug-drug interaction with trimethoprim-sulfamethoxazole, a well-known inhibitor of CYP2C9. Because the patient is entirely asymptomatic and hemodynamically stable, conservative management with dose withholding is the safest and most effective standard of care.

Step-by-Step Solution

1
Evaluate the patient's clinical presentation and laboratory data.
The patient has an elevated INR of 5.4 but is entirely asymptomatic with no evidence of active bleeding.
Bleeding status dictates whether rapid reversal (with Vitamin K, FFP, or PCC) or conservative management is indicated.
2
Identify the etiology of the supratherapeutic INR.
The recent initiation of trimethoprim-sulfamethoxazole caused a drug-drug interaction, as it inhibits the cytochrome P450 2C9 enzyme, thereby decreasing warfarin metabolism.
Understanding the underlying cause helps in adjusting future doses and preventing recurrence.
3
Determine the guideline-directed management for the specific INR range.
For an INR between 4.5 and 10.0 without clinically significant bleeding, the recommended management is to simply omit the next 1 to 2 doses of warfarin and closely monitor the INR.
Conservative management avoids the risk of warfarin resistance that can occur with unnecessary vitamin K administration.

Key Concept

Management of supratherapeutic INR without bleeding
Question 1005Question →

An asymptomatic 6666-year-old man is evaluated in the primary care clinic for an annual wellness assessment. His past medical history is significant for well-controlled type 2 diabetes mellitus and mild osteoarthritis of the right knee. Current medications include metformin and acetaminophen as needed. The patient reports a former tobacco habit, having smoked one and a half packs of cigarettes daily from age 2020 until he successfully quit at age 5050. His vital signs today are within normal limits. A review of his electronic medical record shows a normal screening colonoscopy performed four years ago and up-to-date immunizations, including the 2020-valent pneumococcal conjugate vaccine administered last year. He has not undergone any recent imaging studies. Which of the following is the most appropriate next step in this patient's preventive care?

Show answer & explanation

Answer: One-time screening for an abdominal aortic aneurysm with ultrasonography

Answer

One-time screening for an abdominal aortic aneurysm with ultrasonography is the correct next step because the patient is a male between 65 and 75 years old with a history of smoking.
The most appropriate next step in preventive care for this patient is a one-time screening for an abdominal aortic aneurysm (AAA) using ultrasonography. According to the United States Preventive Services Task Force (USPSTF), a one-time screening for AAA with ultrasonography is recommended for men aged 65 to 75 years who have ever smoked (defined as having smoked at least 100 cigarettes in a lifetime). Since this patient is a 66-year-old man with a significant smoking history who has never undergone this specific screening, the imaging study is strongly indicated to reduce AAA-related mortality.

Step-by-Step Solution

1
Evaluate the patient's demographics and smoking history.
The patient is a 66-year-old male with a 45 pack-year smoking history who quit 16 years ago.
Preventive screening guidelines are heavily dependent on age, biological sex, and specific risk factors such as smoking history.
2
Assess eligibility for lung cancer screening.
Ineligible. Although he meets the age (50-80) and pack-year (>=20) criteria, he exceeds the 15-year smoking cessation limit.
The USPSTF recommends discontinuing lung cancer screening once a person has not smoked for 15 years.
3
Assess eligibility for abdominal aortic aneurysm (AAA) screening.
Eligible. He is a male aged 65-75 who has 'ever smoked' (at least 100 cigarettes in a lifetime).
The USPSTF recommends a one-time AAA screening with ultrasonography for this specific demographic.
4
Review other routine screening statuses.
Colorectal cancer screening is up-to-date (normal colonoscopy 4 years ago). PAD and osteoporosis screening are not routinely indicated for his demographic.
Prevents redundant or unindicated testing that could lead to unnecessary interventions or healthcare costs.

Key Concept

Application of time-sensitive smoking cessation criteria in preventive screening guidelines.
Question 1006Question →

A 68-year-old man is admitted to the telemetry unit for initiation of antiarrhythmic therapy to manage highly symptomatic paroxysmal atrial fibrillation. His medical history is significant for hypertension and benign prostatic hyperplasia. He has no history of structural heart disease, and a recent echocardiogram demonstrated a left ventricular ejection fraction of 60%.

Vital signs are within normal limits. Laboratory results on admission are as follows:

TestResult
Serum sodium140 mEq/L
Serum potassium4.6 mEq/L
Serum magnesium2.1 mg/dL
Serum creatinine0.9 mg/dL

His estimated creatinine clearance is 82 mL/min. A baseline 12-lead electrocardiogram demonstrates normal sinus rhythm with a heart rate of 72/min, a QRS duration of 90 ms, and a QTc interval of 420 ms.

The physician initiates dofetilide therapy at 500 mcg twice daily. Two and a half hours after the administration of the first dose, a repeat 12-lead electrocardiogram shows normal sinus rhythm with a heart rate of 68/min and a QTc interval of 488 ms.

Which of the following is the most appropriate next step in the management of this patient's antiarrhythmic therapy?

Show answer & explanation

Answer: Decrease the dofetilide dose to 250 mcg twice daily

Answer

The correct answer is to decrease the dofetilide dose to 250 mcg twice daily.
The correct answer is to decrease the dofetilide dose to 250 mcg twice daily. Dofetilide is a class III antiarrhythmic agent associated with a significant risk of dose-related QT interval prolongation and Torsades de Pointes. Initiation requires continuous ECG monitoring in a facility. The standard dosing protocol dictates that a baseline 12-lead ECG must be obtained to ensure the QTc is < 440 ms (or < 500 ms with bundle branch block). Two to three hours after the first dose, a repeat ECG must be obtained. If the QTc interval increases by more than 15% from baseline OR if the absolute QTc exceeds 500 ms, the dose must be reduced by 50% (in this case, from 500 mcg to 250 mcg twice daily). For this patient, a 15% increase from his baseline QTc of 420 ms is calculated as 420×1.15=483420 \times 1.15 = 483 ms. His post-dose QTc of 488 ms exceeds this 15% threshold, mandating a dose reduction.

Step-by-Step Solution

1
Identify the critical monitoring window and parameters for dofetilide initiation.
Dofetilide requires continuous telemetry and a 12-lead ECG 2 to 3 hours after the first dose to evaluate for potentially fatal QTc prolongation.
To mitigate the high risk of Torsades de Pointes during the loading phase, standard protocols strictly dictate ECG timing.
2
Calculate the threshold for a clinically significant QTc increase based on the baseline ECG.
The baseline QTc is 420 ms. A >15% increase is calculated as 420×1.15=483420 \times 1.15 = 483 ms. The protocol also checks if the absolute QTc > 500 ms.
The FDA-mandated REMS protocol for dofetilide requires immediate dose adjustment if either threshold (>15% relative increase OR >500 ms absolute value) is breached.
3
Compare the post-dose QTc to the calculated thresholds and determine the appropriate protocol-driven intervention.
The post-dose QTc of 488 ms is greater than the 483 ms relative threshold. Because this occurred after the first dose, the protocol dictates reducing the subsequent doses by 50% (to 250 mcg twice daily), rather than permanently discontinuing.
Adhering to strict dose-reduction algorithms prevents fatal arrhythmias while allowing the patient the opportunity to safely remain on a therapeutic antiarrhythmic at a lower dose.

Key Concept

Dofetilide monitoring protocol requires a 50% dose reduction if the QTc increases by >15% from baseline or exceeds 500 ms 2-3 hours after the first dose.
Question 1007Question →

A 54-year-old female presents for a comprehensive wellness examination. Her past medical history is significant for HIV (diagnosed 10 years ago) and seropositive rheumatoid arthritis. Her HIV is well-controlled on a daily antiretroviral regimen; her most recent CD4 count is 450 cells/mm³ and her viral load is undetectable. Her rheumatoid arthritis is managed with methotrexate and adalimumab. She also has asthma, managed with an inhaled corticosteroid.

Her surgical history is notable for a radical hysterectomy with pelvic lymph node dissection and bilateral salpingo-oophorectomy performed at age 42 for stage IB cervical cancer.

Social history reveals she smoked one pack of cigarettes daily from age 20 to 35 (15 pack-years) but quit 19 years ago.

Preventive care history:
- Screening mammogram at age 52 was reported as BI-RADS 2 (benign findings).
- Screening colonoscopy at age 45 was completely normal.
- She is up to date on her annual influenza vaccination, COVID-19 vaccination, and received a Tdap booster 2 years ago.
- She has never received any pneumococcal vaccinations.
- Her fasting lipid panel and hemoglobin A1c, obtained last week, are within normal limits.

She has no acute symptoms and feels well today. Which of the following is the most appropriate next step in the preventive care of this patient?

Show answer & explanation

Answer: Administer the 20-valent pneumococcal conjugate vaccine (PCV20)

Answer

Administer the 20-valent pneumococcal conjugate vaccine (PCV20)
The correct intervention is to administer the 20-valent pneumococcal conjugate vaccine (PCV20). According to the Advisory Committee on Immunization Practices (ACIP), adults aged 19 to 64 years with certain underlying medical conditions—including immunocompromising conditions like HIV infection and iatrogenic immunosuppression from biologic agents (e.g., adalimumab)—who have not previously received a pneumococcal vaccine should receive a single dose of PCV20 (or alternatively, a dose of PCV15 followed by PPSV23). Because this patient is vaccine-naïve and has multiple qualifying immunocompromising conditions, she requires this vaccination immediately.

Step-by-Step Solution

1
Evaluate the patient's immune status and vaccination requirements.
The patient is severely immunocompromised due to both HIV infection and active treatment with adalimumab (a TNF inhibitor). She is also pneumococcal vaccine-naïve.
ACIP guidelines dictate specific accelerated and expanded pneumococcal schedules for adults aged 19 to 64 years with altered immunocompetence.
2
Assess the indication for lower genital tract screening given her surgical history.
The patient must continue to undergo vaginal cuff cytology screening.
Although she had a total hysterectomy, it was performed for cervical cancer. The ASCCP guidelines require continuous screening for at least 25 years following treatment for CIN2, CIN3, or cervical cancer.
3
Review her eligibility for lung cancer screening.
She is ineligible for LDCT screening.
Current USPSTF guidelines require a minimum 20 pack-year smoking history and for the patient to be a current smoker or have quit within the past 15 years. Her 15 pack-year history and 19-year cessation duration exclude her.
4
Check for contraindications to live vaccines.
Live vaccines (e.g., MMR) are strictly contraindicated.
While an HIV patient with a CD4 count >200 cells/mm³ can generally receive the MMR vaccine, concurrent therapy with a biologic immunosuppressant (adalimumab) serves as an absolute contraindication to all live-attenuated vaccines.

Key Concept

Adults aged 19-64 with immunocompromising conditions should receive the PCV20 vaccine. Furthermore, preventive screening intervals and contraindications must be strictly tailored to specific surgical histories and pharmacologic therapies.
Estimated Time:1m 30s
Question 1008Question →

Match each patient presentation with the most appropriate disposition or care setting transition.

Click a left item, then click its matching right item

Items

A 68-year-old with community-acquired pneumonia, acute confusion, blood urea nitrogen of 25 mg/dL, respiratory rate of 34/min, and blood pressure of 88/50 mmHg.
A 55-year-old with acute pulmonary embolism, stable blood pressure, echocardiographic evidence of right ventricular dysfunction, and elevated serum troponin.
A 62-year-old recovering from an ischemic stroke, medically stable, who requires and can actively participate in 3 hours of intensive therapy daily.
A 45-year-old with severe acute pancreatitis, hemodynamically stable but requiring prolonged, slow weaning from mechanical ventilation via tracheostomy.
A 79-year-old recovering from an open reduction and internal fixation of a hip fracture, medically stable, who requires daily physical therapy but fatigues after 45 minutes.

Matches

Show answer & explanation

Answer

The correct matches align specific clinical severity and functional capacity scores with their respective care settings.
Each presentation matches criteria for specific care settings: CURB-65 ≥ 3 warrants ICU; intermediate-high risk PE warrants telemetry; ≥ 3-hour therapy tolerance warrants IRF; prolonged mechanical ventilation warrants LTACH; and < 3 hours therapy tolerance warrants SNF.

Step-by-Step Solution

1
Calculate the CURB-65 score for the pneumonia patient.
Score is 5 (Confusion, BUN > 19, RR > 30, SBP < 90, Age > 65).
To determine the need for inpatient versus ICU admission.
2
Risk stratify the pulmonary embolism patient.
Normotensive with RV strain and positive troponin indicates intermediate-high risk.
To determine the appropriate level of monitoring for submassive PE.
3
Assess rehabilitation capacity for the stroke and hip fracture patients.
The stroke patient tolerates 3 hours of therapy (IRF criteria met); the hip fracture patient tolerates 45 minutes (SNF criteria met).
To distinguish between intensive and subacute rehabilitation placement.
4
Evaluate the ventilator-dependent patient with pancreatitis.
Stable but needs prolonged weaning.
LTACH provides extended complex medical care and prolonged ventilator weaning.

Key Concept

Appropriate disposition requires matching a patient's medical acuity, severity scoring (e.g., CURB-65), hemodynamic stability, and functional rehabilitation tolerance (e.g., 3-hour rule for IRF vs SNF) to the appropriate level of care.
Question 1009Question →

A 3434-year-old man comes to the clinic for a routine follow-up visit. He was diagnosed with schizophrenia 33 months ago and was started on olanzapine. The patient reports that his auditory hallucinations have completely resolved and he is tolerating the medication well, although he has noticed an increased appetite. His blood pressure is 128/82128/82 mmHg, pulse is 7878/min, and body mass index is 2929 kg/m 2^2 (up from 2626 kg/m 2^2 at baseline). Physical examination shows no abnormalities. Which of the following is the most appropriate next step in monitoring this patient's pharmacotherapy?

Show answer & explanation

Answer: Obtain a fasting lipid panel and fasting blood glucose

Answer

The correct next step is to obtain a fasting lipid panel and fasting blood glucose to evaluate for medication-induced metabolic syndrome.
The correct answer involves evaluating for metabolic derangements. Olanzapine is a second-generation antipsychotic (SGA) that is highly efficacious but carries one of the highest risks for metabolic syndrome among SGAs, comparable to clozapine. The patient's significant weight gain over just 33 months strongly signals the onset of metabolic side effects. Current guidelines mandate routine monitoring of body weight, waist circumference, blood pressure, fasting plasma glucose, and fasting lipid profiles at baseline, 1212 weeks, and annually thereafter for patients on these medications.

Step-by-Step Solution

1
Assess the patient's current clinical status and medication regimen.
The patient has well-controlled schizophrenia on olanzapine but exhibits significant weight gain (increase in BMI of 3 kg/m^2 over 3 months).
Establishing the clinical response and identifying new physical changes guides appropriate follow-up testing.
2
Identify the specific adverse effect profile of the prescribed medication.
Olanzapine is a second-generation antipsychotic known to have a very high risk of inducing metabolic syndrome.
Different antipsychotics have varying side effect profiles that dictate specific routine monitoring requirements.
3
Determine the guideline-directed monitoring tests for this adverse effect.
Guidelines recommend checking fasting blood glucose (or HbA1c) and a fasting lipid panel at baseline, at 12 weeks, and annually thereafter.
Early detection of dyslipidemia and hyperglycemia allows for timely intervention, such as lifestyle modifications or switching to a metabolically neutral antipsychotic.

Key Concept

Patients taking second-generation antipsychotics, particularly olanzapine and clozapine, require routine monitoring for metabolic syndrome, which includes serial assessments of weight, fasting blood glucose, and fasting lipid panels.
Question 1010Question →

A 42-year-old man comes to the clinic for initiation of pharmacotherapy for recently diagnosed active pulmonary tuberculosis. Sputum acid-fast bacilli smears were positive, and nucleic acid amplification testing confirmed Mycobacterium tuberculosis. He has a history of type 2 diabetes mellitus but is otherwise healthy. A standard four-drug regimen consisting of isoniazid, rifampin, pyrazinamide, and ethambutol is planned. Which of the following baseline evaluations MUST be documented prior to starting and monitored during this specific regimen? (Select all that apply)

Select all that apply

Show answer & explanation

Answer: Hepatic aminotransferases and bilirubin; Visual acuity and color discrimination testing

Answer

The required evaluations are hepatic aminotransferases and bilirubin, as well as visual acuity and color discrimination testing.
The standard four-drug regimen for active tuberculosis includes isoniazid, rifampin, pyrazinamide, and ethambutol. Three of these agents (isoniazid, rifampin, and pyrazinamide) are potentially hepatotoxic, necessitating a baseline hepatic panel (aminotransferases, bilirubin, and alkaline phosphatase) and ongoing symptom-driven or periodic monitoring. Ethambutol can cause dose-dependent optic neuritis, which typically presents as diminished visual acuity and loss of red-green color discrimination; therefore, baseline visual acuity (e.g., Snellen chart) and color discrimination (e.g., Ishihara plates) testing are mandatory prior to initiation.

Step-by-Step Solution

1
Identify the specific medications comprising the planned standard four-drug regimen for active tuberculosis.
The regimen consists of isoniazid, rifampin, pyrazinamide, and ethambutol (RIPE therapy).
Different anti-tuberculosis medications have distinct toxicity profiles requiring highly specific monitoring parameters.
2
Determine the primary toxicities for each of the identified first-line agents.
Isoniazid, rifampin, and pyrazinamide are all known to be hepatotoxic. Ethambutol is uniquely associated with dose-dependent retrobulbar optic neuritis.
Baseline parameters must map directly to the expected high-risk toxicities of the prescribed pharmacotherapy.
3
Select the appropriate corresponding baseline and ongoing monitoring tests while excluding tests meant for alternative or second-line agents.
Hepatic panel (aminotransferases and bilirubin) and ophthalmologic testing (visual acuity and color discrimination) are selected. Audiometry, electrocardiography, and thyroid testing are excluded as they monitor toxicities of streptomycin, bedaquiline/fluoroquinolones, and ethionamide, respectively.
Over-ordering tests (such as audiometry for a patient not taking an aminoglycoside) represents inappropriate healthcare utilization and poor test sequencing.

Key Concept

Monitoring parameters for high-risk pharmacotherapies (First-line Anti-Tuberculosis Regimen)
Question 1011Question →

During a routine wellness assessment, a 66-year-old retired mechanic is evaluated in the ambulatory clinic. The patient has a history of type 2 diabetes mellitus and essential hypertension, both well-controlled on metformin and lisinopril. He smoked a pack of cigarettes daily for 25 years but successfully quit at the age of 48. His surgical history is notable for an appendectomy in his twenties. Review of his prior preventive care records reveals the following:

- At age 65, he underwent an abdominal duplex ultrasound which showed an aortic diameter of 2.12.1 cm.
- At age 58, a screening colonoscopy demonstrated excellent bowel preparation and two 44-mm hyperplastic polyps in the distal rectum, which were completely excised.
- At age 65, he received the 20-valent pneumococcal conjugate vaccine (PCV20).
- He completed the two-dose recombinant zoster vaccine series five years ago.
- His influenza vaccination is current for the season.

His electronic health record contains no documentation of prior viral hepatitis screening, and he reports never having been tested. Physical examination today is unremarkable. Vital signs are within normal limits. Based on current evidence-based guidelines, which of the following is the most appropriate next step in this patient's preventive care?

Show answer & explanation

Answer: One-time screening for hepatitis C virus infection

Answer

One-time screening for hepatitis C virus infection
The correct answer is one-time screening for hepatitis C virus infection. The United States Preventive Services Task Force (USPSTF) recommends a one-time screening for hepatitis C virus (HCV) infection in all asymptomatic adults aged 18 to 79 years. This patient falls within this age range and has no documented history of prior HCV screening, making it the most appropriate and unequivocally indicated next step in his preventive care today.

Step-by-Step Solution

1
Evaluate the patient's eligibility for lung cancer screening based on his smoking history.
The patient has a 25 pack-year smoking history but quit at age 48 (18 years ago).
Current USPSTF guidelines recommend stopping annual LDCT screening once a patient has not smoked for 15 years.
2
Assess the need for colorectal cancer surveillance based on prior colonoscopy findings.
The prior colonoscopy 8 years ago found only small, distal hyperplastic polyps.
Small (<10 mm) hyperplastic polyps in the rectum are non-neoplastic and do not increase colorectal cancer risk, meaning the standard 10-year screening interval applies. He is not due until age 68.
3
Determine if additional pneumococcal or shingles vaccinations are needed.
The patient received PCV20 at age 65 and completed the Shingrix series 5 years ago.
ACIP guidelines state that a single dose of PCV20 is sufficient for adults 65 and older, requiring no follow-up with PPSV23.
4
Identify missing age-based universal screening tests.
The patient is 66 years old and has never been screened for hepatitis C.
The USPSTF recommends a one-time screening for hepatitis C virus (HCV) infection in all adults aged 18 to 79 years.

Key Concept

Application of nuanced USPSTF and ACIP preventive care guidelines for older adults
Question 1012Question →

A 4141-year-old man is hospitalized for invasive pulmonary aspergillosis. He underwent a deceased-donor renal transplantation 66 months ago. His maintenance immunosuppression regimen consists of tacrolimus, mycophenolate mofetil, and prednisone. His baseline serum creatinine is 1.41.4 mg/dL. The infectious disease service recommends initiating intravenous voriconazole. Which of the following interventions are required regarding this patient's pharmacotherapy and monitoring? (Select all that apply)

Select all that apply

Show answer & explanation

Answer: Preemptively reduce the tacrolimus dose by approximately 50%50\% and closely monitor serum trough concentrations; Obtain a baseline electrocardiogram and monitor the QTc interval

Answer

The correct interventions are preemptively reducing the tacrolimus dose by approximately 50%50\% and obtaining a baseline electrocardiogram to monitor the QTc interval.
Voriconazole is a potent inhibitor of the cytochrome P450 3A4 (CYP3A4) enzyme system. Tacrolimus is heavily metabolized by CYP3A4. Co-administration results in a profound reduction in tacrolimus clearance, leading to supratherapeutic levels and severe toxicity (such as nephrotoxicity and neurotoxicity). Therefore, it is mandatory to preemptively reduce the tacrolimus dose (typically by 30%30\% to 50%50\%) and strictly monitor trough levels. Furthermore, voriconazole is well-known to cause significant QTc prolongation, requiring baseline electrocardiography and ongoing monitoring to prevent lethal arrhythmias like torsades de pointes.

Step-by-Step Solution

1
Identify the high-risk drug-drug interaction between the newly prescribed antifungal (voriconazole) and the baseline calcineurin inhibitor (tacrolimus).
Voriconazole is recognized as a potent inhibitor of the cytochrome P450 3A4 (CYP3A4) enzyme system, which heavily metabolizes tacrolimus.
Understanding pharmacokinetic interactions is critical to prevent severe iatrogenic toxicity when adding new antimicrobial agents.
2
Determine the necessary dose adjustments for the interacting medications.
A preemptive 30%30\% to 50%50\% reduction in the tacrolimus dose is required immediately upon starting voriconazole, alongside rigorous therapeutic drug monitoring of trough levels.
Without preemptive reduction, tacrolimus clearance plummets, causing rapid accumulation, severe nephrotoxicity, and neurotoxicity.
3
Evaluate the direct adverse effect profile of voriconazole to determine additional monitoring needs.
Voriconazole carries a significant risk for dose-dependent QTc prolongation.
Baseline electrocardiography and ongoing QTc monitoring are mandatory to mitigate the risk of fatal arrhythmias like torsades de pointes.

Key Concept

When initiating a strong CYP3A4 inhibitor such as voriconazole in a patient taking a calcineurin inhibitor like tacrolimus, preemptive dose reduction of the calcineurin inhibitor and rigorous monitoring of drug levels and QTc intervals are mandatory to prevent severe toxicity.
Estimated Time:1m 30s
Question 1013Question →

A 54-year-old man comes to the clinic for a routine follow-up. Three months ago, he was diagnosed with an unprovoked deep vein thrombosis (DVT) in his right lower extremity and was prescribed rivaroxaban. His current medications also include lisinopril and atorvastatin. Vital signs are within normal limits. During the interview, the patient appears anxious and says, 'I want to stop taking this blood thinner. I read on a holistic health forum that these drugs are basically rat poison and are highly toxic to the liver. I think I would be much safer taking high doses of turmeric and vitamin E to thin my blood naturally.' Which of the following is the most appropriate initial response by the physician?

Show answer & explanation

Answer: It sounds like the information you found has caused you a great deal of anxiety. Can you tell me more about your specific concerns regarding this treatment?

Answer

The most appropriate response is to acknowledge the patient's anxiety and ask open-ended questions to explore their specific concerns before providing medical facts.
The correct approach to a patient expressing medical misinformation or fear is to first validate their emotions and explore their underlying beliefs. Using a patient-centered framework builds a strong therapeutic alliance and provides the physician with specific insights into the patient's health literacy. This essential first step must occur before the physician attempts to deliver factual corrections, provide health education, or negotiate alternative treatment plans.

Step-by-Step Solution

1
Analyze the patient's statement and emotional state.
The patient is expressing anxiety and presenting medical misinformation regarding their prescribed anticoagulant, suggesting a desire to switch to unproven supplements.
Understanding the emotional driver (fear/anxiety) is critical for selecting the correct communication strategy.
2
Evaluate the clinical requirement vs. patient autonomy.
The patient requires continued anticoagulation for an unprovoked DVT to prevent a pulmonary embolism, but forcing compliance or using scare tactics is ineffective.
A therapeutic alliance must be maintained to ensure the patient ultimately receives evidence-based care.
3
Select the most appropriate communication framework.
Apply the 'Ask-Tell-Ask' or 'Explore-Validate-Educate' framework. The first step is always to explore the patient's beliefs and validate their emotions.
Premature education, compromising standard of care, or arguing facts will likely increase patient resistance.

Key Concept

When addressing a patient with medical misinformation or fear, the physician must first validate the patient's emotions and explore their underlying beliefs before providing factual corrections or negotiating a treatment plan.
Question 1014Question →

A 54-year-old man presents to the clinic for a follow-up visit regarding newly diagnosed essential hypertension. His medical history includes moderately controlled asthma and chronic lower back pain, for which he takes ibuprofen daily. Over the past three months, his blood pressure has remained elevated at 154/96 mm Hg despite daily adherence to a low-dose thiazide diuretic. During the encounter, the physician emphasizes the importance of dietary modifications, specifically adopting the Dietary Approaches to Stop Hypertension (DASH) diet. The patient sighs and says, "I tried eating nothing but plain chicken and steamed vegetables for two weeks, and it was miserable. I love my salty foods and eating out with friends. I would honestly prefer you just give me a different pill so I do not have to change my lifestyle." Which of the following is the most appropriate next statement by the physician?

Show answer & explanation

Answer: It sounds like enjoying flavorful meals and socializing are very important to you. How might we find a balance between those experiences and your health goals?

Answer

The most appropriate response uses reflective listening to validate the patient's values and asks an open-ended question to help the patient explore how they might balance those values with their health goals.
The correct response demonstrates the use of motivational interviewing (MI). When patients express resistance or frustration regarding lifestyle modifications, the most effective strategy is to avoid confrontation, validate their perspective through reflective listening ('It sounds like enjoying flavorful meals... are very important to you'), and use open-ended questions to explore ambivalence collaboratively. This approach builds the therapeutic alliance and fosters intrinsic motivation for long-term health behavior changes.

Step-by-Step Solution

1
Identify the patient's stage of change and emotional state.
The patient is expressing ambivalence, frustration, and resistance to rigid dietary restrictions, indicating he is struggling with the contemplation stage of behavior change.
Recognizing the patient's resistance is the first step in choosing the correct communication framework.
2
Evaluate the physician's counseling goals.
The goal is to maintain the therapeutic alliance, validate the patient's feelings, and encourage intrinsic motivation rather than forcing compliance or immediately resorting to alternative medical interventions.
Confrontational approaches or inappropriately switching to dangerous pharmacological alternatives worsens clinical outcomes and damages trust.
3
Select the response that aligns with motivational interviewing principles.
The response reflecting the patient's desire for flavorful food and socializing, followed by a collaborative, open-ended question, is the best choice.
This employs the OARS framework (Open questions, Affirmation, Reflective listening, Summarizing) to overcome resistance.

Key Concept

Motivational Interviewing in Patient Counseling
Estimated Time:1m 0s
Question 1015Question →

During an intake evaluation at a community health center, a 52-year-old biological male establishes primary care. The patient reports feeling entirely well and notes his last medical encounter was roughly 15 years ago for a minor musculoskeletal injury. He is a lifetime non-smoker, consumes one alcoholic beverage weekly, and has no known family history of chronic illness or malignancy. His vital signs and physical examination are within normal limits. Which of the following preventive interventions are indicated for this patient today? (Select all that apply)

Select all that apply

Show answer & explanation

Answer: Screening for colorectal cancer; Administration of a tetanus-containing vaccine booster

Answer

The indicated preventive interventions for this patient are screening for colorectal cancer and administration of a tetanus-containing vaccine booster.
The correct interventions are colorectal cancer screening, which the USPSTF recommends for all average-risk adults aged 45 to 75, and a tetanus-containing vaccine booster (Td or Tdap), which the ACIP recommends every 10 years for adults. Because the patient has not seen a physician in 15 years, he is due for both.

Step-by-Step Solution

1
Analyze the patient's demographic and clinical profile.
The patient is a 52-year-old male, lifetime non-smoker, at average risk for chronic diseases, with no healthcare contact in the past 15 years.
Patient age, sex, smoking history, and interval since last visit dictate the indicated preventive services.
2
Evaluate indications for cancer screening based on guidelines.
Colorectal cancer screening is indicated because the patient is over age 45. Lung cancer screening is not indicated because the patient has no smoking history.
To apply current USPSTF recommendations for age-appropriate cancer prevention.
3
Evaluate indications for adult immunizations.
A tetanus-containing booster (Td or Tdap) is indicated because more than 10 years have passed since his last medical encounter.
Adult immunization schedules require a tetanus booster every 10 years to maintain immunity.
4
Evaluate indications for other vascular and metabolic screenings.
Abdominal aortic aneurysm screening is excluded due to age (<65) and non-smoking status. Osteoporosis screening is excluded as he is not a female over 65.
To rule out routine tests that are inappropriate for the patient's specific demographic.

Key Concept

Age-appropriate cancer screening and routine adult immunizations in the primary care setting.
Question 1016Question →

Following the initiation of oral ferrous sulfate for newly diagnosed iron deficiency anemia, a structured follow-up plan is necessary to ensure therapeutic efficacy and replenish physiologic reserves. Arrange the following laboratory assessments and clinical actions in the appropriate chronological sequence for monitoring this patient's treatment response over time.

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Answer

The correct chronological sequence is to first assess the reticulocyte count, followed by measuring hemoglobin concentration, then evaluating serum ferritin levels, and finally discontinuing the oral iron supplementation.
The physiological response to iron supplementation dictates this monitoring sequence. The bone marrow's immediate response is to increase reticulocyte production (7-10 days). As these young red blood cells mature, the overall hemoglobin concentration rises, correcting the systemic anemia (1-2 months). Only after the anemia is fully corrected does the body begin to effectively store excess iron, reflected by a steady rise in serum ferritin (3-6 months). Therapy is discontinued only after these stores are fully replenished to prevent early relapse.

Step-by-Step Solution

1
Identify the timeline for early bone marrow response.
Reticulocyte count increases.
Within 1 to 2 weeks, the bone marrow utilizes the newly available iron to produce new red blood cells, releasing reticulocytes into the circulation.
2
Identify the timeline for systemic anemia correction.
Hemoglobin concentration normalizes.
Over the next 1 to 2 months, the sustained production of mature red blood cells raises the hemoglobin to normal levels.
3
Identify the timeline for physiological reserve restoration.
Serum ferritin levels normalize.
After the anemia is corrected, the body begins storing excess iron. This requires 3 to 6 additional months of therapy.
4
Determine the endpoint of therapy.
Discontinue supplementation.
Once ferritin confirms replete stores, iron therapy has achieved its goal and should be stopped to prevent iron overload and minimize side effects.

Key Concept

Monitoring response to oral iron therapy for iron deficiency anemia follows a predictable physiological timeline: reticulocytosis peaks first (1-2 weeks), followed by hemoglobin correction (6-8 weeks), and finally ferritin repletion (3-6 months).
Question 1017Question →

A 28-year-old man is evaluated for discharge on hospital day 28. He was admitted after a severe motor vehicle collision that resulted in a traumatic brain injury and a right femur fracture. His hospital course was complicated by acute respiratory distress syndrome requiring mechanical ventilation. He underwent a tracheostomy and percutaneous endoscopic gastrostomy (PEG) tube placement. Currently, he is breathing room air, and the tracheostomy was successfully decannulated 5 days ago. His femur fracture was surgically repaired and is healing well. Neurologically, he opens his eyes spontaneously, localizes to painful stimuli, and occasionally tracks objects, but he does not follow simple commands and remains nonverbal. His vital signs are within normal limits. He requires total assistance with all activities of daily living and receives all nutrition and medications via the PEG tube. His parents are eager for him to receive intensive physical and cognitive therapy to maximize his neurologic recovery. Which of the following is the most appropriate disposition for this patient?

Show answer & explanation

Answer: Skilled nursing facility

Answer

Skilled nursing facility
The correct answer is a skilled nursing facility (SNF). This patient has sustained a severe traumatic brain injury and is now medically stable, having been successfully liberated from mechanical ventilation and decannulated. However, he remains profoundly neurologically impaired (nonverbal, unable to follow commands) and requires total assistance with all activities of daily living, along with skilled nursing care for his PEG tube. While his parents desire intensive therapy, admission to an acute inpatient rehabilitation facility (IRF) requires a patient to actively participate in and tolerate at least 3 hours of intensive physical, occupational, and speech therapy per day. A patient who cannot follow simple commands cannot meaningfully participate in this level of acute rehabilitation. An SNF provides the appropriate level of care, offering subacute rehabilitation (lower intensity therapy) and daily skilled nursing care while allowing time for further neurologic recovery.

Step-by-Step Solution

1
Evaluate medical and respiratory stability.
The patient is decannulated, breathing room air, and hemodynamically stable.
This rules out the need for a Long-term acute care hospital (LTACH), which is reserved for patients requiring prolonged mechanical ventilation or complex daily physician interventions.
2
Assess neurologic status and functional capacity for rehabilitation.
The patient is nonverbal, does not follow commands, and requires total assistance with activities of daily living.
To determine eligibility for an Acute inpatient rehabilitation facility (IRF). IRF requires the ability to actively participate in and tolerate at least 3 hours of intense therapy daily, which this patient cannot currently do despite his family's wishes.
3
Determine the appropriate level of post-acute care.
The patient requires daily skilled nursing care for PEG management and ongoing subacute therapy to monitor neurologic recovery.
A Skilled nursing facility (SNF) provides subacute rehabilitation and skilled nursing, making it the safest and most appropriate transition for a patient who is medically stable but incapable of participating in intensive IRF programs.

Key Concept

Patients who require post-acute rehabilitation but cannot actively participate in or tolerate 3 hours of intensive daily therapy due to cognitive or physical limitations should be discharged to a skilled nursing facility (SNF) for subacute rehabilitation.
Question 1018Question →

A 58-year-old woman is evaluated in the outpatient clinic to discuss the results of a recent screening colonoscopy and subsequent biopsy. The physician has already arranged for a private room, ensured the patient's wife is present with her consent, and minimized interruptions. According to established protocols for delivering bad news (e.g., the SPIKES framework), arrange the following physician actions in the most appropriate chronological order.

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Answer

The correct chronological sequence aligns with the subsequent steps of the SPIKES protocol: Assessing Perception, Obtaining Invitation, Giving Knowledge, Addressing Emotions, and Summarizing Strategy.
The SPIKES protocol is a six-step framework designed to facilitate the delivery of bad news. The stem establishes that the first step, Setting up the interview (S), has already been completed. The physician must next assess the patient's Perception (P) of the illness to understand their baseline knowledge. Subsequently, the physician obtains the patient's Invitation (I) to share the information in the preferred format. The physician then shares the Knowledge (K) clearly and directly. After the news is delivered, the physician must address the patient's Emotions (E) with empathic responses. Finally, the physician outlines a Strategy and Summary (S) for future care. Following this chronological sequence minimizes patient distress and ensures optimal comprehension.

Step-by-Step Solution

1
Assess the patient's perception of the medical situation.
The physician asks what the patient already knows about the procedure's purpose.
This prevents shocking the patient and establishes a baseline of their understanding and vocabulary.
2
Obtain the patient's invitation for information disclosure.
The physician asks how much detail the patient wants to hear.
Some patients prefer a general overview rather than specific clinical details, and this respects patient autonomy regarding information processing.
3
Give knowledge and information.
The physician directly states the cancer diagnosis.
Clear, jargon-free communication is necessary to prevent misunderstanding when delivering the definitive bad news.
4
Address emotions with empathy.
The physician acknowledges the patient's reaction and validates their feelings.
Patients often experience a 'cognitive block' when receiving bad news; they cannot process further clinical information until their initial emotional reaction is validated.
5
Formulate a strategy and summarize.
The physician outlines the referral plan and next steps.
Establishing a concrete clinical plan prevents the patient from feeling abandoned and provides a clear, structured path forward.

Key Concept

Delivering Bad News (SPIKES Protocol)
Question 1019Question →

A 68-year-old man comes to the clinic to discuss the results of a recent prostate biopsy. The pathology report indicates high-grade prostate adenocarcinoma. The physician prepares to disclose this diagnosis using the established six-step framework for delivering bad news. Arrange the following physician actions in the correct chronological sequence according to this standardized communication protocol.

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Answer

The correct chronological sequence follows the SPIKES protocol: Setting up, assessing Perception, obtaining Invitation, giving Knowledge, addressing Emotions, and formulating a Strategy.
The SPIKES protocol is a widely accepted, six-step framework designed to help physicians deliver bad news effectively and empathetically. It begins with 'Setting up' the interview in a private, supportive environment. Next, the physician assesses the patient's 'Perception' of their condition. Then, the physician obtains the patient's 'Invitation' to share information. Following this, the physician gives the 'Knowledge' (the bad news). The physician must then address the patient's 'Emotions' with empathetic statements. Finally, the encounter concludes by summarizing and establishing a 'Strategy' for future management.

Step-by-Step Solution

1
Identify the clinical objective in the scenario.
The physician needs to deliver a new cancer diagnosis using an established communication protocol.
Recognizing the core task determines which specific communication framework applies to the situation.
2
Recall the standard protocol for delivering bad news.
The SPIKES protocol is the widely accepted standard framework in medical practice.
SPIKES provides a stepwise approach to minimize patient distress and ensure comprehensive communication.
3
Map the provided specific clinical actions to the corresponding acronym steps.
Setting (privacy), Perception (assessing current knowledge), Invitation (asking about information preferences), Knowledge (giving the diagnosis), Emotions (empathic response), Strategy (next steps).
Aligning specific clinical actions with the theoretical framework ensures the correct chronological sequence is maintained.

Key Concept

The SPIKES protocol for delivering bad news
Question 1020Question →

A 45-year-old man is evaluated in the emergency department for sudden-onset, right-sided pleuritic chest pain that began 4 hours ago. He denies shortness of breath, hemoptysis, palpitations, or syncope. His medical history is significant only for a left tibial shaft fracture sustained 3 weeks ago, which is currently immobilized in a short-leg cast. He takes no daily medications and has no history of malignancy.

Vital signs are:
Vital SignResult
Temperature37.1°C (98.8°F)
Blood pressure135/82 mmHg
Pulse88/min
Respirations16/min
SpO298% on room air

Physical examination reveals a well-appearing man in no acute distress. Cardiopulmonary examination is unremarkable. The right calf is non-tender and without edema.

Laboratory results:
TestResult
Platelet count250,000/mm³
Creatinine0.9 mg/dL
Troponin I<0.01 ng/mL
Brain natriuretic peptide (BNP)45 pg/mL (normal: <100 pg/mL)

Computed tomography (CT) pulmonary angiography demonstrates a segmental pulmonary embolism in the right lower lobe. Transthoracic echocardiography reveals a normal right ventricular size and function. The patient is administered a loading dose of oral apixaban. He is fully independent with his activities of daily living despite his cast. He lives with his wife and has excellent health insurance, with a follow-up appointment with his primary care physician already scheduled for tomorrow morning.

Based on the current evaluation, which of the following is the most appropriate disposition for this patient?

Show answer & explanation

Answer: Discharge home with close outpatient follow-up

Answer

The most appropriate disposition is to discharge the patient home with close outpatient follow-up.
The correct disposition is discharging the patient home with close outpatient follow-up. This patient presents with an acute, provoked pulmonary embolism (due to recent immobilization). He is hemodynamically stable and has normal oxygenation. Crucially, his risk stratification identifies him as extremely low risk. His simplified Pulmonary Embolism Severity Index (sPESI) score is 0, which requires the absence of age > 80, history of cancer, chronic cardiopulmonary disease, pulse ≥ 110/min, systolic BP < 100 mmHg, and SpO2 < 90%. Furthermore, he has no evidence of right heart strain (normal BNP, normal echocardiogram) and no myocardial necrosis (normal troponin), definitively ruling out submassive PE. Given that he has been initiated on a direct oral anticoagulant (apixaban), has excellent home support, and has a scheduled follow-up, the current standard of care dictates direct discharge from the emergency department.

Step-by-Step Solution

1
Assess the patient's hemodynamic stability and oxygenation.
The patient is hemodynamically stable (BP 135/82, HR 88) and well-oxygenated (SpO2 98% on room air).
Hemodynamic instability (e.g., hypotension) indicates a massive, high-risk PE requiring immediate ICU admission and potential thrombolysis.
2
Evaluate for right ventricular (RV) strain and myocardial injury.
Echocardiogram shows normal RV size/function. Biomarkers (BNP, Troponin) are normal.
Presence of RV strain or elevated biomarkers classifies the PE as intermediate-risk (submassive), mandating admission to a step-down or telemetry unit.
3
Calculate objective risk scores (e.g., simplified Pulmonary Embolism Severity Index - sPESI) for outpatient safety.
The patient has 0 points on the sPESI (age < 80, no cancer, no chronic cardiopulmonary disease, HR < 110, SBP ≥ 100, SpO2 ≥ 90%).
An sPESI score of 0 predicts a very low 30-day mortality risk (1.0%), suggesting outpatient management is safe.
4
Assess social support, bleeding risk, and follow-up feasibility.
The patient lives with his wife, is functionally independent, has no bleeding diathesis, and has primary care follow-up scheduled for the next day.
Clinical guidelines require robust social support and reliable follow-up before approving direct discharge from the emergency department for acute PE.

Key Concept

Patients with acute pulmonary embolism who are hemodynamically stable, have no evidence of right ventricular strain, score 0 on the sPESI, and have adequate social support should be discharged directly home from the emergency department on oral anticoagulation.
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