This clinical trial aims to personalise red blood cell transfusion strategies in the crtitically ill patients. The amount of transfusions needs to be minimised in order to prevent adverse events and organ dysfunctions linked to high amounts of red blood cell transfusions. The researchers aim to investigate the efficacy and safety of measuring the central venous oxygen saturation (ScvO2) (oxygen content in a venous blood sample taken from a central line) to guide clinicians if transfusion is necessary. The researchers aim to compare the ScvO2 guided transfusion strategy with transfusion based on the clinician's judgment (taking into consideration the patients' comorbidities and actual vital parameters).
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Number of units of red blood cells transfused per patient
Timeframe: From enrollment to the discharge from the intensive care unit or date of death on the intensive care unit, whichever came first, assessed up to 6 months