During bedside rounds in the surgical intensive care unit, a 68-year-old female patient suddenly develops severe shortness of breath and lightheadedness. Her surgical history is significant for a frontotemporal craniotomy performed three days ago to resect a large meningioma. Current vital signs show a temperature of 37.2°C, blood pressure of 76/44 mmHg, pulse of 132/min, and respirations of 28/min. Oxygen saturation is 85% on room air. Physical examination reveals clear lung fields bilaterally and an elevated jugular venous pressure. A stat electrocardiogram demonstrates sinus tachycardia with new-onset T-wave inversions in leads . Arrange the following management steps in the most appropriate chronological order.
- 1Administer 100% supplemental oxygen and an intravenous crystalloid fluid bolus
- 2Obtain a bedside transthoracic echocardiogram
- 3Withhold systemic thrombolytic therapy and intravenous anticoagulation
- 4Proceed with emergent catheter-directed mechanical pulmonary thrombectomy
- 5Place an inferior vena cava (IVC) filter for secondary prophylaxis
Cevap
The correct chronological sequence is to first administer oxygen and IV fluids, then perform a bedside echocardiogram, actively withhold anticoagulation/thrombolytics due to surgical contraindications, proceed with a mechanical thrombectomy, and finally place an IVC filter.
The patient is experiencing a massive pulmonary embolism (PE), defined by a suspected PE presenting with hemodynamic instability. The immediate first step is supportive resuscitation with oxygen and intravenous fluids to maximize right ventricular preload. Because the patient is unstable, transporting her for a CT pulmonary angiogram is contraindicated; instead, a bedside echocardiogram should be obtained to rapidly assess for right ventricular strain. Once massive PE is confirmed, standard therapy is systemic thrombolysis. However, this patient is 3 days postoperative from a craniotomy, which is an absolute contraindication to both thrombolysis and systemic anticoagulation due to the extreme risk of catastrophic intracranial hemorrhage. Therefore, these therapies must be explicitly withheld, and the patient must undergo emergent catheter-directed mechanical thrombectomy (or surgical embolectomy) to clear the obstruction. Finally, to prevent future emboli in a patient who cannot be anticoagulated, an IVC filter must be placed.
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Algorithm for Massive Pulmonary Embolism with Absolute Contraindications to Anticoagulation
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