What question did this study set out to answer?

This research aims to evaluate the behavior of differential pressure valves under varying settings.

April 27, 2026Fluids and Barriers of the CNS0 citationsOpen Access

Evaluating the additive properties of differential pressure valves in a novel benchtop shunt model

SRSai Chandan Reddy DBDipankar BiswasJohns Hopkins University SMS. Farzad MaroufiJohns Hopkins University

Key Points

This research aims to evaluate the behavior of differential pressure valves under varying settings.
Analysis of flow data in a benchtop shunt model
Comparison of combinations of HBV-AGV settings with the same theoretical opening pressure
Statistically significant differences were observed between valve combinations under the same opening pressure settings.
Nominal opening pressures of Hakim and M.blue valves do not behave additively as expected.
Clinicians should consider potential changes in drainage patterns when adjusting settings.

Abstract

An analysis of the flow data demonstrated statistically significant differences between combinations of HBV-AGV settings adding up to the same theoretical opening pressure. These findings suggest that in practice, the nominal OPs of Hakim and M.blueⓇ valves may not be additive. Clinicians should be aware that drainage patterns can change when adjusting OPs of HakimⓇ and M.blueⓇ valves under the assumption that HBV-AGV settings with the same summed theoretical OP behave alike.

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Cite This Study

Reddy et al. (Fri,) studied this question.

synapsesocial.com/papers/69eefcaefede9185760d3953 https://doi.org/https://doi.org/10.1186/s12987-026-00803-8

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