Investigator considered the device with no clinical utility.

The purpose of this study is to determine whether a new cerebral oxygenation monitoring device is comparatively similar to the current approved devices.

Cerebral oxygenation monitoring is an innovative way to monitoring cardiac surgery patients intraoperatively to reduce the incidence of postoperative hypoxic side effects. There are a number of approved devices already in the market that have proved their efficacy.

Inclusion Criteria:

1. To be 18 years old or older
2. Scheduled for cardiac surgery
3. Treatment will include 72 hours or more of hospital stay
4. Understand enough about the risks and benefits of the study to be able to make an informed decision before agreeing to be in the study

Exclusion Criteria:

1. History of cerebrovascular disease
2. History of skin problems on forehead (skin rashes, acne, allergies, etc.)
3. History of craniofacial surgeries
4. Pregnancy

Adult subjects ≥18 year-old of age admitted to the University Hospital setting scheduled for cardiac surgery or admitted for any cause to the Intensive Care Unit (ICU).