Objective Evaluation of a New Epidural Simulator by the CompuFlo^® Epidural Instrument

Figure 5

Typical pressure-volume infused curve during identification of the epidural space with Compuflo: a, supraspinous ligament (first small peak); b, false loss of resistance (first dip); c, legamentum flavum (increase in resistance); and d, final identification of the epidural space (sudden drop in pressure lasting for at least 5 seconds, resulting in the formation of a low and stable pressure plateau).