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Difficulty: EasyOrdering Imaging Studies

Match each classic clinical vignette with the most appropriate initial imaging modality to order.

  • A 2424-year-old pregnant woman (1414 weeks gestation) presents with acute right lower quadrant abdominal pain, fever, and leukocytosis.Pelvic and abdominal ultrasound
  • A 6565-year-old hemodynamically stable man presents with sudden, severe 'tearing' chest pain radiating to his interscapular region.Computed tomography (CT) angiography of the chest
  • A 5050-year-old woman presents with postprandial right upper quadrant abdominal pain, fever, and inspiratory arrest on deep palpation.Right upper quadrant abdominal ultrasound
  • A 7070-year-old man presents to the emergency department 4545 minutes after the sudden onset of left-sided hemiparesis and dysarthria.Non-contrast computed tomography (CT) of the head

Answer

The correct matches align each clinical presentation with its standard-of-care initial imaging: pelvic ultrasound for the pregnant patient with right lower quadrant pain, CT angiography for suspected aortic dissection, right upper quadrant ultrasound for suspected acute cholecystitis, and non-contrast CT of the head for suspected acute stroke.
Each clinical presentation is a classic scenario requiring a specific initial imaging modality based on standard evidence-based guidelines. Ultrasound is appropriately utilized for pregnant patients to avoid radiation and for evaluating the biliary tree. CT angiography is the standard for stable aortic dissection, and a rapid non-contrast head CT is essential to rule out hemorrhage in acute stroke.

Step-by-Step Solution

1
Analyze the 2424-year-old pregnant patient's presentation.
Acute appendicitis is suspected, and imaging must avoid ionizing radiation.
To ensure fetal safety while effectively establishing a diagnosis.
2
Evaluate the hemodynamically stable patient with tearing chest pain.
Aortic dissection is highly suspected, requiring rapid visualization of the aorta.
To confirm the diagnosis and determine the extent of the dissection before surgical or medical intervention.
3
Assess the patient with right upper quadrant pain and a positive Murphy sign.
Acute cholecystitis is the primary differential, requiring visualization of the gallbladder and biliary tree.
Ultrasound is the most sensitive, specific, and non-invasive initial test for gallbladder pathology.
4
Review the presentation of the patient with sudden-onset hemiparesis.
An acute ischemic or hemorrhagic stroke is occurring.
A non-contrast CT is required immediately to rule out intracranial hemorrhage before considering thrombolytic therapy.

Key Concept

Selecting the most appropriate initial imaging study based on suspected diagnosis, patient stability, and patient-specific safety factors (e.g., pregnancy).
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Topics

Ordering Imaging Studies

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