title: The incidence of low venous oxygen saturation on admission to the intensive care unit: a multi-center observational study in The Netherlands.
abstract: BACKGROUND
  Low mixed or central venous saturation (S(c)vO2) can reveal global tissue hypoxia and therefore can predict poor prognosis in critically ill patients. Early goal directed therapy (EGDT), aiming at an ScvO2 >/= 70%, has been shown to be a valuable strategy in patients with sepsis or septic shock and is incorporated in the Surviving Sepsis Campaign guidelines.
  
  
  METHODS
  In this prospective observational multi-center study, we determined central venous pressure (CVP), hematocrit, pH, lactate and ScvO2 or SvO2 in a heterogeneous group of critically ill patients early after admission to the intensive care units (ICUs) in three Dutch hospitals.
  
  
  RESULTS
  Data of 340 acutely admitted critically ill patients were collected. The mean SvO2 value was > 65% and the mean ScvO2 value was > 70%. With mean CVP of 10.3 +/- 5.5 mmHg, lactate plasma levels of 3.6 +/- 3.6 and acute physiology, age and chronic health evaluation (APACHE II) scores of 21.5 +/- 8.3, the in-hospital mortality of the total heterogeneous population was 32.0%. A subgroup of septic patients (n = 125) showed a CVP of 9.8 +/- 5.4 mmHg, mean ScvO2 values of 74.0 +/- 10.2%, where only 1% in this subgroup revealed a ScvO2 value < 50%, and lactate plasma levels of 2.7 +/- 2.2 mmol/l with APACHE II scores 20.9 +/- 7.3. Hospital mortality of this subgroup was 26%.
  
  
  CONCLUSIONS
  The incidence of low ScvO2 values for acutely admitted critically ill patients is low in Dutch ICUs. This is especially true for patients with sepsis/septic shock.
authors.affiliation: Medical Center Leeuwarden, Leeuwarden, The Netherlands. paulvanbeest@yahoo.com
authors.forename: Paul A
authors.initials: PA
authors.lastname: van Beest
authors.forename: Jorrit J
authors.initials: JJ
authors.lastname: Hofstra
authors.forename: Marcus J
authors.initials: MJ
authors.lastname: Schultz
authors.forename: E C
authors.initials: EC
authors.lastname: Boerma
authors.forename: Peter E
authors.initials: PE
authors.lastname: Spronk
authors.forename: Michael A
authors.initials: MA
authors.lastname: Kuiper
mesh_terms: D018806:APACHE; D000368:Aged; D001784:Blood Gas Analysis / Q000379:methods; D016638:Critical Illness; D005260:Female; D006400:Hematocrit; D006801:Humans; D006863:Hydrogen-Ion Concentration; D015994:Incidence; D007362:Intensive Care Units; D007773:Lactates / Q000097:blood; D008297:Male; D009426:Netherlands; D019370:Observation; D010100:Oxygen / Q000097:blood*; D011379:Prognosis; D011446:Prospective Studies; D012772:Shock, Septic / Q000097:blood; D018709:Statistics, Nonparametric
chemical_list: D007773:Lactates; D010100:Oxygen