« previous next »

Author Question: A patient is being treated with dapsone, an antibiotic, for P. carinii infection. Which of the ... (Read 113 times)

olgavictoria

  • Hero Member
  • *****
  • Posts: 528
on: Jul 16, 2018
A patient is being treated with dapsone, an antibiotic, for P. carinii infection. Which of the fol-lowing ways of measuring oxygen saturation would be most appropriate?
 
  a. In vivo blood gas monitoring c. Pulse oximetry
  b. In vitro blood gas monitoring d. CO-oximetry

Question 2

Fractional hemoglobin saturation is calculated from values measured by which of the following?
 
  a. Pulse oximeter c. Clark electrode
  b. CO-oximeter d. Severinghaus elec-trode


kingfahad97

  • Sr. Member
  • ****
  • Posts: 308
Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: D
The use of dapsone causes an increase in metHb, which will interfere with the accuracy of a pulse oximeter. The presence of metHb will decrease the actual saturation of Hb. Therefore, direct measurement of O2Hb is most appropriate in this case. A CO-oximeter will not only measure the O2Hb, but it will also measure the metHb level.

Answer to Question 2

ANS: B
The fractional hemoglobin saturation is calculated by dividing the amount of O2Hb by the sum of HHb + O2Hb + HbCO + metHb. All four hemoglobin can be measured by a CO-oximeter. A pulse oximeter noninvasively measures oxygen saturation and heart rate only. A Clark electrode measures only the PO2, and a Severinghaus electrode measures the PCO2.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.

Did you know?

Warfarin was developed as a consequence of the study of a strange bleeding disorder that suddenly occurred in cattle on the northern prairies of the United States in the early 1900s.

Did you know?

Approximately 25% of all reported medication errors result from some kind of name confusion.

Did you know?

Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.

Did you know?

Women are 50% to 75% more likely than men to experience an adverse drug reaction.

The liver in this photograph was from a deceased patient with an advanced state of cirrhosis. The liver in this photograph was from a deceased patient with an advanced state of cirrhosis.
The patient is undergoing an allergy skin test by receiving subdermal inoculations of allergens. Inf The patient is undergoing an allergy skin test by receiving subdermal inoculations of allergens. Inf
Patient teaching: heart assessment Patient teaching: heart assessment
Computerized Patient Record (CPR) Computerized Patient Record (CPR)
Pneumonia patient’s chest x-ray. Note the irregular areas of density. Pneumonia patient’s chest x-ray. Note the irregular areas of density.
Patient Physical Status Classification Patient Physical Status Classification
Video: Stomach peristalsis - Movement of Food Through the Small Intestine

For a complete list of videos, visit our video library