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NCT03138200

The Role of Central Venous Oxygen Saturation (ScvO2) as an Indicator of Blood Transfusion in the Critically Ill

Status unknown NA Last updated 3 May 2017
What this trial tests

NA trial testing Blood transfusion in Blood Transfusion; Hemoglobinemia in 160 participants. Status unknown.

Timeline
8 March 2017
Primary endpoint
1 March 2019
1 March 2019

Quick facts

Lead sponsorSzeged University
PhaseNA
StatusStatus unknown
Study typeINTERVENTIONAL
Allocationna
Designsingle group
Maskingnone
Primary purposesupportive care
Enrollment160
Start date8 March 2017
Primary completion1 March 2019
Estimated completion1 March 2019
Sites2 locations across Hungary

Drugs / interventions tested

Conditions studied

Sponsor

Szeged University

Who can join

18 and older, any sex, with Blood Transfusion; Hemoglobinemia or Hypoxia. Patients with the condition only — healthy volunteers not accepted.

Sponsor's own description

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.

Publications & conference data

No peer-reviewed publications indexed yet for this trial.

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Data sources for this page

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