ICU SAQs · Shock states
Oxygen delivery and the four failures of shock
A CICM First-Part basic-science SAQ on shock pathophysiology — DO2 = CO × CaO2; CO = HR × SV (preload, contractility, afterload); and how the failure of the preload, the contractility, the afterload, and the unobstructed ejection produces hypovolaemic, cardiogenic, distributive and obstructive shock, each with a targeted correction.
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Prompt
From first principles, explain how the failure of each determinant of oxygen delivery produces a distinct shock state. Map each determinant to its shock type and to its targeted correction.
Question
From first principles, explain how the failure of each determinant of oxygen delivery produces a distinct shock state. Map each determinant to its shock type and to its targeted correction.[1]
References3ShowHide
- [1]Bersten AD, Soni N (eds) Oh's Intensive Care Manual. 8th edition, Elsevier, 2018.
- [2]Marino PL The ICU Book. 4th edition, Lippincott Williams & Wilkins, 2014.
- [3]Reynolds HR, Hochman JS. Cardiogenic shock: current concepts and improving outcomes. Circulation, 2008.PMID 18250279