While monitoring an active infant through a transcutaneous blood gas system, you notice a rapid rise in PtcO2 from 63 to 145 mm Hg. At that same time, the (PtcCO2) drops from 35 to 7 mm Hg. What is the most appropriate action in this case?
a. Perform a quick assessment of the infant's airway.
b. Stabilize the infant and call for emergency assistance.
c. Check the sensor for air leaks or dislodg-ment.
d. Remove the sensor and recalibrate the in-strument.
ANS: C
Proper sensor-electrolyte contact is essential, as is proper application to the skin surface. A loose-ly applied sensor may have air leaks or may become dislodged. In either case, the resulting meas-urements will approach those in room air:
PO2 = 159 mm Hg
PCO2 = 0 mm Hg
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