Study Finds Noninvasive, Continuous Masimo PVi Monitoring More Valuable Than Central Venous Pressure Measurement for Guiding Fluid Management During Surgery

Nachrichtenquelle: Business Wire (engl.)
04.05.2020, 08:00  |  115   |   |   

Masimo (NASDAQ: MASI) announced today the findings of a study published in the Journal of Anesthesiology and Reanimation Specialists’ Society in which researchers compared two methods of intraoperative fluid management during orthopedic spinal surgery, including Masimo PVi. In comparison to invasive and intermittent central venous pressure (CVP) measurement, noninvasive and continuous pleth variability index (PVi) provided “better cardiac stabilization with less fluid replacement, and more accurate results in the evaluation of intravascular volume status.”1

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Masimo Radical-7 with PVi (Photo: Business Wire)

Masimo Radical-7 with PVi (Photo: Business Wire)

Dr. Eralp Çevikkalp and colleagues at Celal Bayar University in Turkey, noting the importance of intraoperative fluid management during surgery and the drawbacks of traditional invasive, static fluid assessment methods such as CVP and mean arterial pressure (MAP), investigated whether PVi might provide an effective noninvasive and dynamic alternative. In a randomized, controlled trial of 100 adult patients undergoing elective posterior lumbar stabilization surgery, they compared fluid loading-induced changes as guided by PVi and by CVP. The patients were divided into two equally sized groups. In the PVi group, patients were continuously monitored using a Masimo Radical-7 Pulse CO-Oximeter, and a PVi threshold of > 14% was used to determine whether fluid was administered. (For patients with a PVi > 14%, a 250 mL crystalloid solution was administered every 5 minutes; for patients with a PVi < 14%, a 4 mL fluid infusion was administered.) In the control group, fluid administration was determined using CVP, other traditional parameters, and the 4-2-1 rule. In both groups, lactate, hemoglobin, and hematocrit levels were also recorded.

The researchers found that the mean volume of intraoperative fluid replacement was 1914 ± 542.86 mL in the PVi group and 3522 ± 1098.1 mL in the control group (p < 0.05). They found that the mean units of intraoperative red blood cells (RBC) transfused was 0.08 ± 0.27 units in the PVi group and 0.42 ± 0.57 units in the control group (p < 0.05). Differences between the groups in postoperative RBC units transfused and intraoperative hemoglobin levels were not significant.

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