Masimo Radical Pulse Co-oximeter in Intraoperative Blood Transfusion Practice During Obestatric Procedure Clinical Trial
Official title:
The Value of Continuous Noninvasive Hemoglobin Monitoring Using Masimo Radical Pulse Co-oximeter in Intraoperative Blood Transfusion Practice During Obestatric Procedure
The principle aim of this study is to detect the accurracy of Masimo Radical-7¿ Pulse CO-Oximeter in relation to laboratory hemoglobin and estimated blood loss in intraoperative blood transfusion practice during obstetric procedures with high risk of bleeding.
Photoplethysmography of peripheral perfusion can be displayed by pulse oximeters. While the
pulse oximeterplethysmogram represents a volume change and the arterial line blood pressure
tracing represents a pressure change, it has been demonstrated that cyclical shifts in the
plethysmogram reflect similar cyclic changes in the blood pressure tracing and that these
changes reflect changes in the intravascular volume status of patients.Plethysmography
Variability Index (PVI) is a measure of the dynamic changes in the perfusion index (PI) that
occur during the respiratory cycle . PVI = ﴾PI Max - PI Min﴿ ÷ PI Maxx 100 %.
PVI has the potential to provide useful information concerning changes in the balance between
intrathoracic airway pressure and intravascular fluid volume. Trending of PVI may be useful
in monitoring surgical patients, both intraoperatively and postoperatively, for appropriate
hydration states. For example, a rising PVI may indicate developing hypovolemia and gives an
alarm for the need of appropriate fluid and or blood products transfusion supported by the
patient hemoglobin level.
Continuous Hb monitoring may allow a more rapid detection of clinically significant blood
loss, and has the potential to significantly improve perioperative transfusion practices, may
enable a more rapid assessment of a patient's condition and more appropriate blood management
and even perhaps reduce needless transfusions.
;