NIRS
Pronunciation: NEARS
Also written as: NIRS — Near-Infrared Spectroscopy
Near-infrared spectroscopy monitoring used to assess regional tissue oxygenation, particularly cerebral and somatic oxygen saturation.
Full Definition
Near-infrared spectroscopy (NIRS) is a non-invasive monitoring technique that uses light wavelengths between 700-1000 nanometers to measure tissue oxygen saturation. In cardiovascular anesthesiology, NIRS is primarily used for cerebral oximetry to detect cerebral desaturation events during cardiac surgery. The technology can also monitor renal and somatic tissue oxygenation. NIRS values typically range from 55-75% in healthy adults, with decreases below baseline indicating potential ischemia requiring intervention.
Usage
Usage note: Always spell out on first use in formal documentation.
In Context
- "NIRS monitoring revealed a 20% decrease in cerebral saturation during aortic cross-clamping." — Intraoperative monitoring report
- "The anesthesia team implemented NIRS-guided perfusion management protocols." — Quality improvement documentation