Exposure of a Clark electrode to gaseous anesthetic agents such ...

[ts19998]

Exposure of a Clark electrode to gaseous anesthetic agents such as nitrous oxide will cause which of the following to occur?
 
  a. The pH will increase.
  b. The electrode will function normally.
  c. There will be an increase in the production of peroxide ions.
  d. The carbon dioxide in the blood will in-crease and cause an erroneous reading.

Question 2

Which of the following variables are measured directly by a blood gas machine? 1. pH 2. PaO2 3. HCO3 4. SaO2
 
  a. 1 and 2 c. 3 and 4
  b. 2 and 3 d. 1 and 4

[flexer1n1]

Answer to Question 1

ANS: C
Exposure of the PO2 electrode to nitrous oxide might alter its electronic output by increasing the production of peroxide ions.

Answer to Question 2

ANS: A
The pH is measured directly by using a Sanz electrode. The PaO2 is measured directly by using a Clark electrode. The HCO3 is derived from measurements of pH and PaCO2 is derived by using the Henderson-Hasselbalch equation. The saturation of hemoglobin can be calculated by using an equation empirically derived from the oxyhemoglobin saturation curve.

[ts19998]

Thank you

[flexer1n1]

No problemo