A transcutaneous partial pressure of oxygen (PtcO2) reading is reliable in which of the following situations?
a. Hypothermia
b. Septic shock
c. Infant respiratory distress syndrome
d. Elevated peripheral (cutaneous) resistance
ANS: C
A reduction in cutaneous circulation will dramatically affect the measurement of transcutaneous partial pressure of oxygen (PtcO2). This situation is caused by hypothermia, septic shock, and ele-vated peripheral resistance. PtcO2 measurements have been shown to be reliable for neonates.
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