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
a. 1 and 5 c. 3 and 4
b. 2 and 3 d. 1, 2, and 5
ANS: D
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 be-tween the Teflon membrane and the pH glass electrode, erroneous data can result.
You might also like to view...
How is oxygen diffusion affected when pulmonary edema is present?
A. Diffusion is directly related to thickness of the a-c membrane so diffusion will increase B. Diffusion is indirectly related to thickness of the a-c membrane so diffusion will decrease C. Diffusion is indirectly related to the thickness of the a-c membrane so diffusion will increase D. Diffusion is directly related to the thickness of the a-c membrane so diffusion will decrease
________ is the coordination of body alignment, balance, and movement.
A. Body mechanics B. Chiropractic C. Ergonomic motion D. Posture
Low blood calcium levels are called what?
a. Hyperparathyroidism b. Hypoglycemia c. Hypocalcemia d. Hypercalcemia
The description of whole blood is ________.
A. the buffy coat in centrifuged blood B. the total volume of plasma and formed elements C. the rupturing of red blood cells D. the main component of erythrocytes E. the clear, yellow liquid that remains after a blood clot forms