Central venous pressure is a measure of pressure in the superior vena cava which can be used as an estimation of preload and right atrial pressure” Shah and Louis (2018).
Excerpt:
Central venous pressure is a measure of pressure in the superior vena cava which can be used as an estimation of preload and right atrial pressure. Central venous pressure is often used as an assessment of hemodynamics in a patient, particularly in intensive care units. The central venous pressure can be measured using a central venous catheter placed in the superior vena cava near the right atrium. A normal central venous pressure reading is between 8 to 12 mmHg. This value can be changed depending on a patient’s volume status or venous compliance.
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Reference:
Shah, P. and Louis, M.A. (2018) Physiology, Central Venous Pressure. SourceStatPearls [Internet]. Treasure Island (FL): StatPearls Publishing.