CSF flow through third ventriculostomy demonstrated with colour Doppler ultrasonography.

We report two paediatric cases in which a non communicating hydrocephalus was treated by neuro-endoscopic third ventriculostomy. Subsequently, patency of the septostomy defect and CSF flow through it was demonstrated employing colour Doppler ultrasound. The biphasic nature of the flow jet was confirmed with pulse wave Doppler.