Masimo Radical-7 Monitor a Useful Adjuvant During Major Spine Surgery

A Study to Determine the Agreement Between Masimo Monitor and Standard of Care

This is a study designed to compare the agreement of hemoglobin (Hb) measurements, documented at specific time points (the time a blood sample was obtained by the standard clinical care after physician/nurse orders it and, during that same time, the Hb value recorded by the Masimo Radical-7 monitor); recorded several times throughout patient's major spine surgery procedure (depending on how many times the physician/nurse orders the Hb value to be tested), between the standard clinical practice {intermittent measure of Hb [Cedar Sinai Medical Center (CSMC) Lab and outside lab) and Masimo radical-7 device (continuous, non-invasive Hb level measurements)*.

*See whether or not the hemoglobin values recorded at the same time matches between the standard clinical practice (CSMC Lab and outside Lab) and the Masimo device

Inclusion Criteria:

• Patients scheduled to undergo multiple level spine surgery procedures
• 18 - 80 years of age
• American Society of Anesthesiologists (ASA) Class I - III adults of either sex
• Pregnant women

Exclusion Criteria:

• Patients with a perfusion index less than 1 or low confidence reading
• Patients with nail polish and /or a nail deformity on a finger that would used for sensor placement
• Patient undergoing cardio-pulmonary bypass