Match each clinical presentation of suspected pulmonary embolism or venous thromboembolism to the most appropriate initial or definitive imaging modality.
- 32-year-old woman at 28 weeks gestation presenting with acute dyspnea, pleuritic chest pain, and unilateral right calf swelling.Compression ultrasonography of the lower extremity
- 58-year-old man with a high pretest probability for pulmonary embolism, normal chest radiograph, and an estimated glomerular filtration rate of 22 mL/min/1.73m2.Ventilation-perfusion (V/Q) scan
- 65-year-old woman with sudden-onset pleuritic chest pain, hemoptysis, a high pretest probability for pulmonary embolism, and normal renal function.Computed tomography pulmonary angiography (CTPA)
- 72-year-old man with acute severe dyspnea, right ventricular heave, and a blood pressure of 75/40 mm Hg who cannot be safely transported.Bedside transthoracic echocardiography
Cevap
The pregnant patient with calf swelling matches to compression ultrasonography. The patient with severe chronic kidney disease matches to a V/Q scan. The stable patient with normal renal function matches to CTPA. The hemodynamically unstable hypotensive patient matches to bedside transthoracic echocardiography.
Evidence-based guidelines dictate that while CTPA is the gold standard for most patients, specific clinical scenarios require deviations. Hemodynamic instability mandates bedside echocardiography to detect right heart strain. Severe renal impairment requires a V/Q scan to prevent contrast nephropathy. Pregnancy combined with deep vein thrombosis symptoms favors initial lower extremity compression ultrasonography to potentially bypass radiation entirely.
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Anahtar Kavram
The selection of diagnostic imaging for suspected pulmonary embolism must be individualized based on hemodynamic stability, renal function, and pregnancy status to minimize the risks of contrast nephropathy, radiation exposure, and clinical deterioration during transport.
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