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Author Question: Which of the following techniques allows a pulse oximeter to determine the amount of hemoglo-bin in ... (Read 48 times)

pepyto

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on: Jul 16, 2018
Which of the following techniques allows a pulse oximeter to determine the amount of hemoglo-bin in a blood sample?
 
  a. Tonometry c. Fluorescent tech-nology
  b. Spectrophotometry d. Optical plethys-mography

Question 2

A patient with a bilirubin level of 28 mg/dL has arterial blood drawn for CO-oximetry. The res-piratory therapist should expect a(n) _____ measurement.
 
  a. Accurate O2Hb c. Higher-than-actual O2Hb
  b. Lower-than-actual O2Hb d. Higher-than-actual HbCO


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Pamela.irrgang@yahoo.com

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

ANS: B
Pulse oximeters use spectrophotometry to determine the amount of hemoglobin in a blood sam-ple. They use optical plethysmography to estimate the heart rate by measuring cyclic changes in light transmission through the sample site during each cardiac cycle.

Answer to Question 2

ANS: B
The presence of bilirubin in quantities greater than 20 mg/dL of whole blood can alter measure-ments because it absorbs near-infrared (IR) and IR light. Absorbance of light by bilirubin lowers the actual O2Hb measured.


pepyto

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Reply 2 on: Jul 16, 2018
Gracias!

nanny

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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