Hydrocephalus and shunts: a comparative flow-pressure study





Hydrocephalus, Ventriculoperitoneal shunt, Differential pressure shunt, Shunt pressure Equivalency Table


Introduction: Differential Pressure Shunts (DPS) for hydrocephalus work through a pressure differential between the proximal and the distal inlet. Neurosurgeon’s reference is extra-low, low, medium, normal or high-pressure valves, symbolizing the shunt’s resistance against the downstream flow. The Brazilian manufacturing process for all shunts is regulated by ISO 7195 version 2006, revised in 2016, and it allows a lot of flexibility in the determination of shunt resistance and flow characteristics.

Methods: This article compares the pressure-flow characteristics of some hydrocephalus shunts available in Brazil based on their information brochures

Results: Six shunt information brochures were compared regarding to CSF flow-control manufacturing graphs and/or pressure work range tables. Based on the data obtained of each valve, authors propose and introduce a comparative table that can be helpful if used as a guide to the neurosurgeon when one considers either a first time shunt implantation or a shunt revision

Conclusion: There is no standardization regarding the pressure which defines the different models of shunts available in Brazil and neurosurgeon must be aware when choosing a specific shunt and even more when, in a shunt review, choose another manufacturer.



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How to Cite

Maset AL, Ballestero MFM, de Moraes DF. Hydrocephalus and shunts: a comparative flow-pressure study. Arch Pediat Neurosurg [Internet]. 2021 Jan. 31 [cited 2022 May 17];3(1(January-April):e542021. Available from: https://archpedneurosurg.com.br/pkp/index.php/sbnped2019/article/view/54

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