• Tomotaka Ohshima, Yoshitaka Nagano, Hiroki Tadauchi, Tsuyoshi Mase, and Shigeru Miyachi.
• Neuroendovascular Therapy Center, Aichi Medical University, Nagakute, Aichi, Japan. Electronic address: tmtkoh@gmail.com.
• World Neurosurg. 2019 Dec 1; 132: 99-102.

BackgroundHemostasis valves are commonly used in neurointerventions. We propose a novel concept for fixing hemostasis valves to the operating table during procedures. Moreover, we report our preliminary in vitro experience using these new devices created using a 3-dimensional printer.MethodsThe hemostasis valve holder (HVH) comprises 2 components: an inner fixer and an outer socket. It was designed to be suitable for use with all rotational hemostasis valves commercially available. HVH contains magnets at the bottom that facilitate its attachment to a thin steel board beneath a sterilized drape on the working table. We evaluated the HVH's efficacy via in vitro experiments involving stent placement by a single operator.ResultsHVH allowed easy attachment to and detachment from the rotational hemostasis valve. Moreover, the use of multiple HVHs facilitated operators to concentrate on the procedure because they continuously prevented the unexpected movement of devices at several points. Use of HVHs enables stent placement to be performed even by a single operator. We observed that forming a loop of the stent delivery catheter between 2 HVHs enhanced the device control.ConclusionsHVHs should be more useful than conventional methods, particularly in cases requiring fine complementary control of both a microcatheter and microguidewire.Copyright © 2019 Elsevier Inc. All rights reserved.

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