Abstract
A simple and safe technique for performing an endoscopic third ventriculocisternostomy is described using a small-diameter semirigid neuroendoscope in conjunction with a perforated ventricular catheter to bluntly fenestrate the floor of the third ventricle. All previous descriptions involve the initial use of an introducer sheath that in our experience lends to loss of cerebrospinal fluid, consequently distorting the anatomic landmarks of the third ventricle as well as compromising the crucial concave shape of its floor. Our technique limits the loss of cerebrospinal fluid volume, therefore, reducing the chance of basilar artery complex perforation as a consequence of distortion of third ventricular landmarks and loss of third ventricular floor concavity.
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