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 Lithium dilution cardiac output (LiDCO) requires a peripheral or central arterial line.

 Uses pulse power analysis rather than pulse contour analysis. The algorithm is based on the assumption that the net power change in the system in a heartbeat is the difference between the amount of blood entering the system, the stroke volume, and the amount of blood flowing out peripherally.

 Requires calibration using transpulmonary lithium indicator dilution technique via a peripheral venous line. It is not as accurate when the patient is receiving lithium or certain neuromuscular‐blocking agents.