• Taiki Yamamoto, Kazuhito Takeuchi, Yuichi Nagata, Akihiro Mizuno, and Toshihiko Wakabayashi.
• Department of Neurosurgery, Nagoya University, Nagoya, Japan. Electronic address: yamamoto.taiki@i.mbox.nagoya-u.ac.jp.
• World Neurosurg. 2021 Jan 1; 145: 1-4.

BackgroundThe efficacy and safety of endoscopic procedures for slit ventricle syndrome (SVS) have been presented in recent studies. However, inserting a sheath into a target ventricle is essential in the beginning of endoscopic procedures for SVS, and this maneuver is challenging owing to the quite narrow ventricular space. We report a novel flexible endoscopic technique, the water-slide technique, that can effectively guide a sheath into a slit ventricle without the use of other adjunctive devices, such as a neuronavigation system and an ultrasound machine.MethodsTen endoscopic procedures using the water-slide technique were performed in 9 patients with SVS. All patients had undergone ventriculoperitoneal shunt placement. Using the technique, the sheath was first placed on the flexible endoscope. The endoscope was then inserted into the lateral ventricle along the tract around the pre-existing ventricular catheter with irrigation of artificial cerebrospinal fluid via the working channel of the endoscope. After the endoscope reached the ventricle, the sheath was inserted into the ventricle along the endoscope. The endoscope was then used as a stylet. The endoscopic procedure was performed afterward. Continuous irrigation of artificial cerebrospinal fluid via the working channel is important when using this technique.ResultsIn all cases, the sheath was successfully introduced to the slit ventricle without the use of adjunctive devices. There were no postoperative complications correlated with the maneuver.ConclusionsThis novel endoscopic technique is effective and safe for inserting a sheath into a target ventricle in the management of SVS.Copyright © 2020 Elsevier Inc. All rights reserved.

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