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Author Question: What are the two principles of operation for pulse oximetry? 1. Photoplethysmography 2. Tonometry 3. ... (Read 50 times)

notis

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on: Jul 16, 2018
What are the two principles of operation for pulse oximetry? 1. Photoplethysmograph y 2. Tonometry 3. Spectrophotometry 4. Amperometry 5. Potentiometry
 
  a. 1 and 3 c. 1 and 5
  b. 2 and 4 d. 3 and 5

Question 2

Which of the following statements is true concerning the CO-oximeter measurement of a patient with a bilirubin level greater than 20 mg/dL in whole blood?
 
  a. The O2Hb value will be lower than the actual O2Hb.
  b. The O2Hb value will be higher than the actual O2Hb.
  c. The HbCO value will be higher than the actual HbCO level.
  d. The bilirubin level will not affect the re-sults of the CO-oximeter.


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fur

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Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: A
Pulse oximetry is based on the principles of spectrophotometry and photoplethysmograph y.

Answer to Question 2

ANS: A
Bilirubin levels of greater than 20 mg/dL of whole blood will alter measurements, because biliru-bin absorbs near-IR and IR light. Absorbance of light by bilirubin lowers the actual O2Hb meas-ured.


notis

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Reply 2 on: Jul 16, 2018
Great answer, keep it coming :)

bigcheese9

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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