The purpose of this study is to determine whether a higher threshold for transfusion with red blood cells improves the tissue oxygenation.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
SUPPORTIVE_CARE
Masking
QUADRUPLE
Enrollment
60
Transfusion with red blood cells to hemoglobin level between 4,5-5,5 mmol/L
Transfusion with red blood cells to hemoglobin level between 5,6-6,5 mmol/L
Rigshospitalet
Copenhagen, Østerbro, Denmark
The change in subcutaneous oxygen tension from incision.
The primary endpoint is the change in subcutaneous oxygen tension from incision until the time most patients is still undergoing surgery. Subcutaneous oxygen tension is measured every fifteen minutes throughout surgery. The oxygen tension is measured with a polygraphic electrode (Clark's electrode).
Time frame: Every fifteen minutes throughout surgery
Oxygenation of the brain
Time frame: Every fifteen minutes throughout surgery
The concentration of lactate in plasma
Time frame: Every half an hour throughout surgery
Variation in the ST-segment of the ECG
Time frame: Every fifteen minutes throughout surgery
Muscular saturation of the deltoid muscle
The change in muscular saturation from incision until the time when most patientes are still undergoing surgery. Furthermore the lowest measured and the last measured muscular saturation is also evaluated.
Time frame: Every fifteen minutes throughout surgery
The change in subcutaneous oxygen tension from incision.
The lowest measured subcutaneous oxygen tension and the last measured subcutaneous oxygen tension throughout surgery.
Time frame: Every fifteen minutes throughout surgery
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