NIRS tehnology for cerebral and somatic oximetry

NIRS uses specific calibrated wavelengths near infrared light, for noninvasive tissue oxygenation measuring below sensor set on the skin. Those wavelenghts of light, dispersed through the tissue, are apsorbed depending on the amount of oxygen bounded to hemoglobin in the microcirculation. Unapsorbed light is comming back as an optical signal and analyzes, whereby gets the ratio of hemoglobin with oxygen to total hemoglobin, expressed as a percentage of rSO2.

Clinical features:

  • Non-invasive
  • Capillary (venous and arterial) sample
  • Measures the relation between oxygen supply and brain demand
  • Oxygenation and organ perfusion
  • Does not require pulsation neither flow
  • Normal values: 58-82

Clinical use:

  • Hemodynamic instability
  • Neurological diseases
  • Hypoxic brain injury
  • Respiratory insufficient patients
  • Congenital heart defects
  • Hypoxic – ischemic encephalopathy
  • Traumatic brain injuries
  • Necrotizing enterocolitis
  • ECMO