Oximetery competency

Question 1

Indication

Answer 1

• When a pt requires continuous O2 monitoring
• anesthesia and intraoperative
• post operatively when a pt is still sedated
• sleep study
• bronchoscopy evaluating the effectiveness of O2 therapy

Question 2

Contraindications

Answer 2

• SpO2 less than 70%
• known or suspected carbon monoxide poisoning(gen 1 only)

Question 3

Definition /generations

Answer 3

• -Gives a SpO2 -
  
  • non-invasive % of hgb that is oxygen saturated
• 1st generation
  
  • cheaper and readily available
  • work for most pts
  • same 2 wavelengths of light— not effective for patients with CO poisoning, unable to recognize presence or quantity of unuseable Hgb
• 2nd gen -
  
  • expensive -
  • uses several wavelengths of light so can identify unuseable Hbg, so can be used on pt with CO poisoning

Question 4

Modifications

Answer 4

• • remove nail polish
• weak pulse
• outside light interference
• poor circulation

Question 5

spectrophotometry

Answer 5

a method of identifying substances by their absorption of specific wavelengths in the electromagnetic spectrum

Question 6

plethysmography

Answer 6

used to find and evaluate the amplitude of the arterial pulse wave form

Question 7

acid/base shift impact on SpO2 v PaO2

Answer 7

• alkalotic-
  
  • left shift on OHDC
  • increase affinity
  • lower P50: PO2 about 20
• Acid-
  
  • right shift-
  • decrease affinity
  • higher P50: PO2 about 34

Question 8

transmittance v reflective spectrophotmetry

Answer 8

• transmittance- sending light through the arterial bed to the sensor on the other side -
• reflective- sensors are placed on the same side of the arterial bed