All of the following cause decrease in reading in values of pulse oximeter except
Pulse oximetery - Measure oxygen saturation of aerial blood (SpO2) - 2 principle- Law of plethysmography -Measures the pulsatile flow of blood in capillary Law of oximetery / BEER LAMBE'S Law Inaccuracies in pulse oximetery reading - Hypotension - Hypothermia - Other hemoglobins (Sulph hemoglobin) - Dyes or pigments - Dark skin color - Nail polish (Blue) - Jaundice and Anemia does not affect the value of pulse oximetry Poable pulse oximeter with finger probe. Pulse oximetery = HbO2 /(HbO2 +HbH ) CO oximetery = HbO2 / (HbO2 +HbH + Sulph Hb + Meth Hb) Reflectance oximeter - for forehead attachment Eg. Used in amputated patients HbO2 - Oxy Hb HbH - Deoxy Hb
Meth-Hb
CarboxyHb
Hb-S,Hb-F
Sulp-Hb
Anaesthesia Q Bank