The Role of Central Venous Oxygen Saturation (ScvO2) as an Indicator of Blood Transfusion in the Critically Ill
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|ClinicalTrials.gov Identifier: NCT03138200|
Recruitment Status : Unknown
Verified April 2017 by Zsolt Molnár, MD, PhD, DEAA, Szeged University.
Recruitment status was: Recruiting
First Posted : May 3, 2017
Last Update Posted : May 3, 2017
Transfusion of red blood cells is an everyday practice in critical care with the primary aim of restoring adequate tissue oxygenation. However, blood transfusion may also be harmful and costly, therefore a so called restrictive transfusion regime has been suggested by recent guidelines. These transfusion guidelines consider certain levels of hemoglobin as transfusion trigger, which on its own gives little information if any about the balance between oxygen delivery (DO2) and consumption (VO2). Hence, there is a clear need for additional physiologic transfusion trigger values. One of the potentially useful and easily obtainable physiological parameters is the central venous oxygen saturation (ScvO2), which has been shown to be a potential transfusion trigger value in hemodynamically stable but anemic patients. However, the role of ScvO2 as a transfusion trigger value was examined only in a retrospective observational study and in animal experiment.
The normal value of ScvO2 in a resting adult at rest is around 70-75%, which is the product of the VO2 and DO2 relationship. Low ScvO2 usually indicates inadequate DO2. It was found in an observational study that if ScvO2>70% before transfusion due to transfusion only the value of hemoglobin increased but the value of ScvO2 did not change. This finding indicates that the DO2 may have been adequate in spite of the low hemoglobin value and the transfusion may have been unnecessary. In one of their recent animal experiments, the investigators reported that in an isovolemic-anemia model the value of ScvO2<70% was only reached when the value of hemoglobin was far less, 59 g/L, than the recommended lowest value of 70g/L as transfusion trigger by guidelines.
Despite the pathophysiological rationale and the encouraging results of retrospective studies and animal experiments, prospective randomized trials in order to test the effects of an ScvO2-assisted transfusion protocol are yet to be performed.
The aim of this study is to investigate the effects of an ScvO2-assisted transfusion protocol as compared to the guideline-based, hemoglobin levels guided transfusion practice.
|Condition or disease||Intervention/treatment||Phase|
|Blood Transfusion; Hemoglobinemia Hypoxia Anemia||Biological: Blood transfusion||Not Applicable|
|Study Type :||Interventional (Clinical Trial)|
|Estimated Enrollment :||160 participants|
|Intervention Model:||Single Group Assignment|
|Masking:||None (Open Label)|
|Primary Purpose:||Supportive Care|
|Official Title:||The Role of Central Venous Oxygen Saturation (ScvO2) as an Indicator of Blood Transfusion in the Critically Ill|
|Actual Study Start Date :||March 8, 2017|
|Estimated Primary Completion Date :||March 1, 2019|
|Estimated Study Completion Date :||March 1, 2019|
|Blood transfusion based on central venous oxygen saturation||
Biological: Blood transfusion
Blood transfusion is a safe, routine procedure in which blood is given to a patient through an intravenous cannula inserted into one of the patient's veins.
- Comparison of number of transfuion events in the two groups [ Time Frame: 2 years ]Comparison of how many tranfusions were performed based on ScvO2 to conventional, hemoglobin based transfusion.
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03138200
|Department of Anaesthesiology and Intensive Therapy||Recruiting|
|Szeged, Csongrád, Hungary, 6725|
|Contact: Petra Dalmann +36 62 - 545 168 email@example.com|
|Department of Anaesthesia and Intensive Care, Medical Centre, Hungarian Defence Force||Active, not recruiting|
|Budapest, Hungary, 1134|