Provide a valuable resource to your clients or customers by linking to this resource page. Just place the following link on your website.
A cerebral oximeter is a monitoring device that estimates oxygen saturation in brain tissue. It usually uses near-infrared spectroscopy, or NIRS, through sensors placed on the forehead. The device displays regional cerebral oxygen saturation values rather than the oxygen level in the blood alone. It is used as an additional monitoring tool in selected surgery, intensive care, neonatal, and cardiac settings.
read more about cerebral oximeter ...A cerebral oximeter is used when clinicians want to monitor brain oxygenation trends. It may be used during cardiac surgery, carotid procedures, neonatal care, ECMO support, shock, anesthesia, or critical care. The readings can alert the team to possible changes in oxygen delivery to the brain. It does not replace neurologic exams, blood pressure monitoring, pulse oximetry, blood gases, or imaging when those are needed.
Sensors send near-infrared light through the scalp and skull into underlying tissue. The device measures how light is absorbed by oxygenated and deoxygenated hemoglobin. Software estimates regional cerebral oxygen saturation from those signals. Trends over time are often more useful than a single number because baseline values can vary between patients.
A cerebral oximeter system usually includes disposable or reusable forehead sensors, a monitor, cables, software, and alarms or trend displays. Some systems monitor both sides of the forehead to compare left and right values. Others may connect with broader patient monitoring platforms. Sensor placement and skin contact are important for reliable readings.
Cerebral oximetry can be affected by sensor position, skin pigmentation, scalp thickness, ambient light, motion, low blood pressure, anemia, extracranial blood flow, and device algorithm differences. The value is an estimate of regional oxygen saturation, not a direct measurement of whole-brain oxygen delivery. A sudden drop should prompt clinical assessment rather than automatic treatment. Neurologic changes, severe low oxygen, shock, or equipment alarms require prompt evaluation.
No. Pulse oximetry estimates arterial oxygen saturation at a peripheral site, while cerebral oximetry estimates regional oxygen saturation in brain tissue.
No. Sensors are placed on the skin, usually on the forehead. The device uses light to estimate tissue oxygenation.
No. It can show oxygenation trends, but stroke diagnosis requires clinical evaluation and imaging when indicated.
Baseline readings vary between people, so a meaningful drop from the patient’s own baseline can be more useful than one isolated number.
Cerebral Oximeter: Product Classification. U.S. Food and Drug Administration. https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfpcd/classification.cfm?ID=QEM. Date Accessed June 18, 2026.
Cerebral Oximetry and Near Infrared Spectroscopy. OpenAnesthesia. https://www.openanesthesia.org/keywords/cerebral-oximetry-and-near-infrared-spectroscopy/. Date Accessed June 18, 2026.
In vivo validation of cerebral near-infrared spectroscopy. PubMed Central. https://pmc.ncbi.nlm.nih.gov/articles/PMC6257082/. Date Accessed June 18, 2026.
Cerebral oximetry in cardiac anesthesia. PubMed Central. https://pmc.ncbi.nlm.nih.gov/articles/PMC3966165/. Date Accessed June 18, 2026.
The Use of Cerebral Oximetry in Cardiac Surgery. PubMed Central. https://pmc.ncbi.nlm.nih.gov/articles/PMC9732949/. Date Accessed June 18, 2026.