December 15, 2023- Masimo announced the findings of a retrospective study published in the Journal of Anesthesia in which Dr. Yu Jeong Bang and colleagues at the Samsung Medical Center, Sungkyunkwan University School of Medicine, in Seoul, South Korea, investigated the association of Masimo ORi™ and the arterial partial pressure of oxygen (PaO2) in 554 patients who underwent non-cardiac thoracic surgery during one-lung ventilation (OLV), making this study the largest to date on ORi.
Noninvasive, continuous Masimo ORi provides continuous, real-time insight into the oxygenation of hemoglobin in the moderate hyperoxic range (PaO2 > 100 and ≤ 250 mmHg) to be used alongside arterial blood gas analyses, which have the drawbacks of being invasive, intermittent, and delayed.
ORi is trended continuously with SpO2 as a unit-less index between 0.00 and 1.00 to extend the visibility of the patient oxygenation beyond SpO2 under supplemental oxygen. By convention, SpO2 is limited to an upper limit of 100%, but oxygenation is not limited and can rise into hyperoxia (higher than normal oxygenation state) when supplemental oxygen is administered. ORi provides clinicians with additional visibility, as a complement to SpO2 monitoring with Masimo SET® pulse oximetry, into when oxygenation is increased into, or decreased out of, moderate hyperoxia, in real time.