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Updated: Oct 17, 2026
Neuronavigation and Laparoscopy Guided Ventriculoperitoneal Shunt Insertion for the Treatment of Hydrocephalus
Published on: October 14, 2022
The Evolution of Technological Innovation in CSF Shunt Technology: A Patent Bibliometric Analysis Encompassing the
Mei Hainline1, Kathleen S Botterbush1, Mayur Patel1
1Division of Neurological Surgery, Department of Surgery, Saint Louis University School of Medicine, Saint Louis, Missouri.
Background:
Despite decades of technological development, cerebrospinal fluid (CSF) shunts remain associated with high failure rates and limited structural evolution. While bibliometric analyses have characterized innovation trends across several neurosurgical subspecialties, no dedicated patent analysis of CSF shunt technology exists. This study characterized the evolution of CSF shunt-related intellectual property (IP) and identified features associated with influential innovation.
Methods:
A retrospective patent bibliometric analysis was performed using the Lens database. Granted patents related to CSF shunt technology were identified using keyword-based and Cooperative Patent Classification (CPC)-restricted searches. Patents were ranked by raw forward citation count and citation velocity as surrogate markers of technological influence. The 100 most highly cited patents were reviewed and categorized by primary technological innovation.
Results:
A total of 764 CSF shunt-related patents were identified. Overall patent activity demonstrated exponential growth over time, with notable surges during the late 1980s and early 2020s. Among the 100 most influential patents, catheter/drainage hardware and pressure-regulation technologies accounted for 82% of patents. In contrast, monitoring and sensing technologies represented only 9% of patents but demonstrated the highest median citation velocity at 6.3 citations per year.
Conclusions:
CSF shunt-related patent activity has increased substantially over time. While influential innovation remains concentrated in iterative refinements of catheter and valve systems, citation velocity identified monitoring and sensing as an emerging area of technological influence, highlighting recent shifts in technological development beyond traditional shunt architectures. Future progress will depend on integrating physiologic monitoring, adaptive flow regulation, and real-time feedback into next-generation shunt platforms.
