What sign indicates the pulmonary artery catheter is in the correct location?
a. An audible beep heard on the invasive monitor screen
b. A narrow downstroke followed by a single notch on the upstroke
c. A steep upstroke followed by a dicrotic notch on the downstroke
d. A tachycardic QRS waveform (heart rate 100 bpm or greater)
ANS: C
When the catheter floats through the pulmonary semilunar valve into the pulmonary artery, a pulmonary artery tracing should appear on the monitor. This waveform has a steep upstroke at the beginning from right ventricular ejection and opening of the pulmonic valve, followed by a dicrotic notch on the downstroke at the closing of the pulmonic valve.
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