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LiDCO is similar to PiCCO in that its main way of estimating cardiac output is by arterial waveform analysis.
The calibration this time is performed by injecting a small amount of Lithium intravenously (any vein, not necessarily central). Arterial lithium concentration is recorded by drawing blood past a lithium sensor attached to the patient’s existing arterial line. With the resulting concentration – time curve (fig. 1), the cardiac output is calculated.

Monitoring washout lithium

Figure 1. Washout curve for Lithium measured from arterial line sample.

Values displayed on the LiDCO monitor are cardiac output, arterial pressure, stroke volume, stroke volume variability and systemic vascular resistance.

Complications of LiDCO

All those associated with arterial lines

Further reading


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