Arterial catheter rapid flush test

Intravascular pressure tracings obtained during the rapid flushing of a monitoring catheter. A. Optimal damping in which rapid flushing produces a rapid upstroke in pressure followed by recovery characterized by a fall in pressure to below baseline with less than three beats of ringing. B. Overdamped system in which no ringing is seen. C. Underdamped system in which there is excessive ringing.