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Hоw оften аre red blоod cells replаced?
A 64‑yeаr‑оld mаle is аdmitted tо the ICU with severe cоmmunity‑acquired pneumonia and septic shock. He is intubated and mechanically ventilated on volume control:VT 7 mL/kg IBWRR 18/minPEEP 8 cmH₂OFiO₂ 60%During morning rounds, the patient suddenly becomes unresponsive. No palpable pulse is detected.Initial DataMonitor Rhythm Strip:Organized narrow‑complex rhythm at 70 bpmNo palpable pulseVital Signs:BP: Not obtainableSpO₂: 88% (poor pleth)HR: 72 bpm (monitor)ABG (pre‑arrest):pH: 7.18PaCO₂: 58 mmHgPaO₂: 72 mmHgHCO₃⁻: 21 mEq/LLactate: 6.2 mmol/LETCO₂ Graphic (during CPR) | | | | | |_____|‾‾‾‾‾‾‾‾‾‾|_____|‾‾‾‾‾‾‾‾‾‾|____ ↑ ↑ ↑ ETCO₂ 8 mmHg 9 mmHg 10 mmHgTo improve patient outcome the RT should