Table 1 Measuring tissue oxygenation
From: Clinical review: Hemodynamic monitoring in the intensive care unit
Monitor | Method | Variables | Global/regional | Invasive/non-invasive |
|---|---|---|---|---|
Systemic oxygenation | Pulmonary artery catheter | VO2/DO2/ERO2 | Global | Invasive |
Mixed venous O2 saturation | Pulmonary artery catheter–blood gas analyses | SVO2 | Global | Invasive |
Lactate | Laboratory–enzymatic testing | Lactate | Global | Invasive |
Gastrointestinal tonometry | Measurement of pCO2 in an air-filled or saline-filled balloon | prCO2/pCO2 gap, pHi | Regional | Minimally invasive |
Near-infrared spectroscopy | Absorbance analysis of near-infrared light | Hb/O2Hb, cytochrome aa3 | Regional | Non-invasive |
Oxygen electrodes | Polarographic probes | pO2 | Regional | Minimally invasive |