Which wave pattern indicates proper functioning of an arterial line?

The wave pattern that indicates proper functioning of an arterial line is characterized by steady fluctuations. This pattern reflects the pulsatile nature of arterial blood flow, which oscillates due to the heart's contractions. In a healthy individual, the arterial pressure waveform should display a clear distinction between systolic and diastolic pressures, typically showing peaks and troughs consistently.

A flat line would suggest that there is no blood flow detected by the arterial line, indicating a potential problem or malfunction. Low to high or high to low wave patterns would not represent the normal arterial pressure fluctuations and could imply issues with the line itself or with the patient's hemodynamics. Therefore, steady fluctuations are essential for confirming that the arterial line is functioning properly and accurately reflecting the patient's blood pressure.