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Difficulty: HardClinical Preventive Services and Screening

Establish the most appropriate high-priority screening intervention for each presented patient scenario based on current USPSTF Grade A and B evidence-based guidelines.

  • 35-year-old man with a body mass index of 32 kg/m² and resting blood pressure of 128/82 mm HgScreening for prediabetes and type 2 diabetes with a fasting plasma glucose or hemoglobin A1c
  • 42-year-old average-risk woman with no family history of malignancyBiennial screening mammography
  • 53-year-old man with a 30 pack-year smoking history who quit 10 years agoAnnual screening with low-dose computed tomography of the chest
  • 68-year-old man who smoked half a pack of cigarettes daily for three years during collegeOne-time screening for abdominal aortic aneurysm with ultrasonography
  • 24-year-old primigravida at 10 weeks gestation with no urinary symptomsScreening for asymptomatic bacteriuria with urine culture

Answer

The scenarios are correctly paired by applying specific age, risk-factor, and demographic thresholds mandated by current USPSTF preventive screening algorithms.
Each pairing aligns strictly with current USPSTF Grade A and B recommendations. Diabetes screening begins at age 35 for individuals with overweight or obesity. Mammography begins at age 40 for average-risk women. Lung cancer screening via LDCT requires a specific pack-year threshold (20+) and age (50-80). AAA screening requires any smoking history (≥ 100 cigarettes) in men aged 65-75. Asymptomatic bacteriuria screening via urine culture is a standard Grade A prenatal requirement.

Step-by-Step Solution

1
Evaluate the 35-year-old man's metabolic risk factors.
He has a BMI of 32 kg/m², which classifies as obese, meeting criteria for diabetes screening.
Guidelines mandate screening for abnormal blood glucose in overweight or obese adults starting precisely at age 35.
2
Determine the breast cancer screening threshold for the 42-year-old woman.
She qualifies for biennial screening mammography.
Updated guidelines have lowered the initiation age for routine breast cancer screening to 40 years for all average-risk women.
3
Assess lung cancer screening eligibility for the 53-year-old man.
He requires annual low-dose computed tomography (LDCT).
He satisfies all three criteria for LDCT: age (50-80), pack-year history (≥ 20), and timing of cessation (quit ≤ 15 years ago).
4
Review cardiovascular screening needs for the 68-year-old man.
He requires a one-time ultrasound for an abdominal aortic aneurysm.
Although his smoking history is brief (1.5 pack-years), it exceeds the 'ever smoked' minimum threshold (100 lifetime cigarettes) required for men aged 65-75.
5
Identify prenatal screening priorities for the asymptomatic 24-year-old pregnant patient.
She must undergo a urine culture for asymptomatic bacteriuria.
Untreated asymptomatic bacteriuria in pregnancy can lead to pyelonephritis and preterm delivery, making universal screening essential at the first prenatal visit.

Key Concept

Application of precise demographic and risk-based criteria (age cutoffs, pack-year history vs. 'ever smoked' definitions) for USPSTF Grade A and B clinical preventive services.
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Topics

Clinical Preventive Services and Screening

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