Which of the following changes would occur if an arterial blood sample of a patient breathing room air were exposed to a large air bubble? 1. Decreased PCO2 2. Decreased pH 3. Increased PO2
a. 1 and 2 only
b. 1 and 3 only
c. 2 and 3 only
d. 1, 2, and 3
Q. 2 When analyzing an ABG sample from a patient with acute respiratory distress syndrome and re-fractory hypoxemia, you notice a PaO2 of 141 mm Hg and a PaCO2 of 14 mm Hg. Which of the following analytic errors should you suspect?
a. Excessive time since sample collection
b. Exposure of the blood sample to air
c. Excessive heparin in the sample
d. Sample admixture with venous blood
Q. 3 Analysis of an arterial blood sample taken from a healthy athlete reveals a pH of 7.36, a PCO2 of 45 mm Hg, and a PO2 of 43 mm Hg. Which of the following analytic errors should you suspect?
a. Excessive time since sample collection
b. Exposure of the blood sample to air
c. Excessive heparin in the sample
d. Sample admixture with venous blood
Q. 4 Which of the following would you expect to occur if too much heparin was used in gathering an ABG sample from a patient breathing room air?
a. Increase in HCO3
b. Decrease in PCO2
c. Decrease in pH
d. Decrease in PO2
Q. 5 To avoid the dilution effects caused by too much sodium heparin during ABG sampling of an adult, what should you do?
1. Ensure a sample volume greater than 2 ml.
2. Use dry heparin instead.
3. Fill the needle dead space only.
4. Use saline if dry heparin is not available.
a. 1 and 4 only
b. 1 and 3 only
c. 2 and 4 only
d. 1, 2, and 3 only
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