Figure 3From: Guided Application of Ventricular Catheters (GAVCA) - multicentre study to compare the ventricular catheter position after use of a catheter guide versus freehand application: study protocol for a randomised trail Ventricular catheter guide placed on the surface of the skull model as used during surgery. A: In the coronal plane, the individual angulation towards the skull surface can be adjusted. B: In the sagittal plane, the angulation to the skull surface is fixed at 90°.Back to article page