A damped arterial trace is a blunted trace with a low systolic and high diastolic reading. Mean arterial pressure often remains the same. Causes of over damping are a kinked catheter, blocked line or air bubbles in the line. If such a trace is seen then flushing the line or removing air bubbles may restore the accurate undamped trace.
Is when the opposite occurs leading to a system that over-reacts to changes in pressure.