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A 52-year-old man presents to the emergency department with shortness of breath and new-onset lower extremity edema. His vital signs are: temperature 37.0 °C (98.6 °F); heart rate 114 beats/min; respiratory rate 28 breaths/min; blood pressure 86/62 mm Hg; and oxygen saturation as measured by pulse oximetry, (SpO2) 92% on nonrebreather mask. He is transferred to the ICU, intubated, and a central line is placed. His hemoglobin is 9.2 g/dL, lactic acid is 4.2 mg/dL, SpO2 has improved to 98%, and central venous oxygen saturation is (ScvO2) 43%. This Scvo2 level indicates which of the following findings? A. Decreased oxygen delivery and/or decreased oxygen consumption B. Decreased oxygen delivery and/or increased oxygen consumption C. Increased oxygen delivery and/or decreased oxygen consumption D. Increased oxygen delivery and/or increased oxygen consumption
Sagot :
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