Masimo Radical Pulse Co-oximeter in Intraoperative Blood Transfusion Practice During Obestatric Procedure
Conditions
Brief summary
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.
Detailed description
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.
Interventions
DEVICEof Masimo Radical-7¿ Pulse CO-Oximeter
The Masimo pulse oximetry model: The pulse oximetry model which Masimo developed accounts for saturation values contributed by the true arterial signal, and by one or more motion or noise signals. lt is assumed that under conditions of motion, the detected IR and RD signals comprise both the true arterial saturation signal and a venous (or non-arterial) motion noise signal. Masimo uses a highly sophisticated adaptive filter with, Discrete saturation transform (DST) four other parallel engines, to leverage each algorithm's unique strengths to ensure accurate readings through all patient conditions. Masimo SET's most powerful algorithm is Signal extraction technology (SET). All algorithms depend upon assumptions. The more assumptions, the weaker the algorithm. DST makes only one assumption -that arterial blood has a higher oxygenation than venous - making it the most powerful pulse oximetry algorithm
Sponsors
Mohamed, Ahmed A., M.D.
Ashraf Mohamed Abd Elmawgod
Abdelhamid, Bassant Mohamed, M.D.
Hossam Eldin Mostafa Yahia
Cairo University
Study design
Observational model
COHORT
Time perspective
CROSS_SECTIONAL
Eligibility
Sex/Gender
FEMALE
Age
16 Years to 44 Years
Healthy volunteers
Yes
Inclusion criteria
1. All adult high risk patients (ASA 1-2) 2. Age group (16-44 years old) 3. Obtetric surgery with high risk of bleeding in early and late pregnancy e.g Disturbed ectopic pregnancy ,Vesicular mole , Abortion , Placenta accrete , Rupture uterus and placenta previa
Exclusion criteria
1. Significant liver disease defined as (serum alanine aminotransferase and serum aspartate aminotransferase \>2.5 times normal). 2. Significant renal disease defined as (serum creatinine \>1.5 mg/dl or creatinine clearance \<40 ml/min). 3. Significant coagulopathy defined as (INR \>1.5). 4. Use of antiplatlets or anticoagulants. 5. Anemic patients with Hb% less than 8 gm/dl
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Transfusion improvement | 24 hours | Improvement of transfusion practice by detecting the amount of transfused units of RBCs during rapid blood loss |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Agreement between SpHb and laboratory Hb values | 24 hours | The frequency of laboratory Hb testing and agreement between SpHb and laboratory Hb values |
Countries
Egypt
Outcome results
None listed