Non-invasive Hemoglobin Monitoring in Cesarean Section

Study Overview
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Brief Summary
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Non-invasive hemoglobin monitoring will be performed in patients who underwent cesarean section with placenta previa and this will be compared with actual laboratory findings. The investigators will investigate whether noninvasive hemoglobin monitoring can adequately reflect the massive bleeding that occurs within a short period of time and find out if it matches the actual laboratory findings.

Official Title
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The Effectiveness of Intraoperative Non-invasive Hemoglobin Monitoring in Parturients With Placenta Previa Undergoing Cesarean Section: Prospective Observational Study

Conditions
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Placenta Previa

Intervention / Treatment
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* Device: Masimo SpHb™ monitor


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Pregnant woman Elective Cesarean section Placenta previa Exclusion Criteria: Decline of consent Peripheral vascular disease Cyanosis due to congenital heart disease Refusal of transfusion Mental retardation

Ages Eligible for Study
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Minimum Age: 20 Years
Maximum Age: 50 Years

Sexes Eligible for Study
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Female

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Diagnostic
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: Placenta previa<br> | Device: Masimo SpHb™ monitor<br>* Attach the Masimo Rainbow SET® Radical-7 ™ pulse oximeter probe to the third or fourth finger and perform a Masimo SpHb ™ monitor.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The change of total hemoglobin |  | 10 min before operation, 10 min after operation, 1 min after skin incision, 1 min after delivery of baby, 1 min after removal of placenta, 1 min after skin closure | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The change of oxygen content |  | 10 min before operation, 10 min after operation, 1 min after skin incision, 1 min after delivery of baby, 1 min after removal of placenta, 1 min after skin closure | 
| The change of methemoglobin |  | 10 min before operation, 10 min after operation, 1 min after skin incision, 1 min after delivery of baby, 1 min after removal of placenta, 1 min after skin closure | 
| The change of carboxyhemoglobin |  | 10 min before operation, 10 min after operation, 1 min after skin incision, 1 min after delivery of baby, 1 min after removal of placenta, 1 min after skin closure | 
| The change of pleth variability index |  | 10 min before operation, 10 min after operation, 1 min after skin incision, 1 min after delivery of baby, 1 min after removal of placenta, 1 min after skin closure | 
| The change of perfusion index |  | 10 min before operation, 10 min after operation, 1 min after skin incision, 1 min after delivery of baby, 1 min after removal of placenta, 1 min after skin closure |