FIG 3.

Craniospinal compliance curve in a 63-year-old woman suspected but not radiographically confirmed to have CVF. Estimated linear compliance for each CTM is shown as a dashed line, approximating the shape of the pressure-volume curve (A). The second CTM was performed after the blood patch showed an increase in opening pressure (B and C). The effect of the blood patch is diminished on delayed repeat CTM (D), in which the left side of the curve, including opening pressure, more closely matches the prepatch curve.