Postoperative And Post-Trauma Care Practice Test

After a motor vehicle collision, a 30-year-old woman arrives hypotensive (BP 78/44) and tachycardic (HR 132); FAST is positive for free fluid; Hgb 9.2 g/dL, lactate 5.1 mmol/L. Which intervention is most critical at this stage of care?​

Two days after knee surgery, a 45-year-old woman on prophylactic LMWH develops sudden dyspnea and syncope; BP 82/50, HR 128; bedside echo shows RV dilation. Which intervention is most critical at this stage of care?​