Conditions causing increased SvO2

• Before or during high-risk cardiovascular surgery
  
• Patients in advanced-stage heart failure
  
• Patients with acute myocardial infarction
  
• Patients with acute hypoxemic respiratory failure (eg, pulmonary embolism, pulmonary infarction)
  
• Patients with severe burns
  
• Patients with multisystem organ failure
  
• Neurosurgery patients
  
• High-risk obstetric patients
  

SVO₂ monitoring is also used to do the following:

• Evaluate the adequacy of tissue oxygenation
  
• Detect adverse changes in oxygen delivery (DO₂) and oxygen consumption (VO₂) or impaired tissue oxygenation
  
• Evaluate the effectiveness of interventions to improve the balance between DO₂ and VO₂ including the administration of fluids (blood, crystalloids), pharmacological agents and use of mechanical assistance (eg, intra-aortic balloon pump, positive end-expiratory pressure)
  
• Evaluate the effects of routine medical and nursing procedures on tissue oxygenation
  
• Diagnose intracardiac shunting and cardiac tamponade
  
• Assist in the differential diagnosis of pathological conditions
  

high SVO₂ values (>80%–95%) may be related to an increase in cardiac output, a decrease in oxygen demand, or a reduction in O₂ER.1 Various conditions, clinical events, and factors that may affect tissue oxygenation can cause significant changes in SVO₂

http://ccn.aacnjournals.org/cgi/content/full/24/4/73