Design and Characterization of an Adjustable Passive Flow Regulator and Application to External CSF Drainage
Passive valves that deliver a constant flow rate regardless of inlet pressure changes have numerous applications in research, industry, and medical fields. The present article describes a passive spring valve that can be adjusted manually to deliver the required flow rate. The valve consists of a mo...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/14/3/675 |
| _version_ | 1797610089319759872 |
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| author | Eric Chappel |
| author_facet | Eric Chappel |
| author_sort | Eric Chappel |
| collection | DOAJ |
| description | Passive valves that deliver a constant flow rate regardless of inlet pressure changes have numerous applications in research, industry, and medical fields. The present article describes a passive spring valve that can be adjusted manually to deliver the required flow rate. The valve consists of a movable rod with an engraved microchannel. The fluidic resistance of the device varies together with the inlet pressure to regulate the flow rate. A prototype was made and characterized. Flow-rate adjustment up to +/−30% of the nominal flow rate was shown. A simple numerical model of the fluid flow through the device was made to adapt the design to external ventricular drainage of cerebrospinal fluid (CSF). Some insights about the implementation of this solution are also discussed. |
| first_indexed | 2024-03-11T06:09:36Z |
| format | Article |
| id | doaj.art-c203690c4a314485b78eec5452282def |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-11T06:09:36Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-c203690c4a314485b78eec5452282def2023-11-17T12:44:07ZengMDPI AGMicromachines2072-666X2023-03-0114367510.3390/mi14030675Design and Characterization of an Adjustable Passive Flow Regulator and Application to External CSF DrainageEric Chappel0Microsystems Department, Debiotech SA, 1004 Lausanne, SwitzerlandPassive valves that deliver a constant flow rate regardless of inlet pressure changes have numerous applications in research, industry, and medical fields. The present article describes a passive spring valve that can be adjusted manually to deliver the required flow rate. The valve consists of a movable rod with an engraved microchannel. The fluidic resistance of the device varies together with the inlet pressure to regulate the flow rate. A prototype was made and characterized. Flow-rate adjustment up to +/−30% of the nominal flow rate was shown. A simple numerical model of the fluid flow through the device was made to adapt the design to external ventricular drainage of cerebrospinal fluid (CSF). Some insights about the implementation of this solution are also discussed.https://www.mdpi.com/2072-666X/14/3/675passive valveflow controlconstant flow regulatorexternal ventricular drain (EVD)cerebrospinal fluid (CSF) |
| spellingShingle | Eric Chappel Design and Characterization of an Adjustable Passive Flow Regulator and Application to External CSF Drainage Micromachines passive valve flow control constant flow regulator external ventricular drain (EVD) cerebrospinal fluid (CSF) |
| title | Design and Characterization of an Adjustable Passive Flow Regulator and Application to External CSF Drainage |
| title_full | Design and Characterization of an Adjustable Passive Flow Regulator and Application to External CSF Drainage |
| title_fullStr | Design and Characterization of an Adjustable Passive Flow Regulator and Application to External CSF Drainage |
| title_full_unstemmed | Design and Characterization of an Adjustable Passive Flow Regulator and Application to External CSF Drainage |
| title_short | Design and Characterization of an Adjustable Passive Flow Regulator and Application to External CSF Drainage |
| title_sort | design and characterization of an adjustable passive flow regulator and application to external csf drainage |
| topic | passive valve flow control constant flow regulator external ventricular drain (EVD) cerebrospinal fluid (CSF) |
| url | https://www.mdpi.com/2072-666X/14/3/675 |
| work_keys_str_mv | AT ericchappel designandcharacterizationofanadjustablepassiveflowregulatorandapplicationtoexternalcsfdrainage |