Erroneous PCO₂ measurements can be caused by which of the following?
1)A worn electrode
2)A cracked electrode
3)Wearing out of the silver anode
4)Increased temperature of the patient
5)Dehydration of bicarbonate solution

Question

Quizplus · Accepted Answer

The most common problems encountered with a PCO₂ electrode involve interference with the diffusion of CO₂ across the Teflon membrane and the H⁺ ions across the glass membrane from either worn or cracked electrodes or protein deposits.If the bicarbonate solution dehydrates between the Teflon membrane and the pH glass electrode,erroneous data can result.

Erroneous PCO₂ Measurements Can Be Caused by Which of the Following