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08:41
Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions
Published on: September 7, 2018
Urea separation in flat-plate microchannel hemodialyzer; experiment and modeling
Alana R Tuhy1, Eric K Anderson, Goran N Jovanovic
1Department of Chemical Engineering, Oregon State University, 103 Gleeson Hall, Corvallis, OR 97331, USA.
Biomedical Microdevices
|March 1, 2012
Summary
New microchannel hemodialyzers show significantly higher urea removal efficiency compared to commercial devices. This advancement in hemodialysis technology could lead to more effective treatments for kidney disease patients.
Area of Science:
- Biomedical Engineering
- Mass Transport Phenomena
- Renal Replacement Therapy
Background:
- Current hollow-fiber hemodialyzers have limitations in dialysate flow requirements.
- Microfluidic devices offer potential for enhanced mass transfer in dialysis.
Purpose of the Study:
- To design and evaluate novel flat-plate microchannel hemodialyzers.
- To compare the urea removal efficiency of microchannel hemodialyzers with commercial devices.
- To develop and validate a predictive mathematical model for mass transport.
Main Methods:
- Construction of flat-plate microchannel hemodialyzers with 100μm deep channels.
- Experimental urea removal studies using countercurrent flow of water.
- Development of a 3D finite volume mass transport model in FORTRAN.
Main Results:
- The mathematical model accurately predicted experimental urea removal (within 2.7%-11%).
- Microchannel hemodialyzers achieved overall mass transfer coefficients of 0.068–0.14 cm/min.
- The predicted average mass transfer coefficient (0.08 cm/min) was 60% higher than commercial dialyzers.
Conclusions:
- Flat-plate microchannel hemodialyzers demonstrate superior urea transport.
- The developed model provides accurate predictions for microchannel hemodialyzer performance.
- Microchannel technology offers a promising alternative for more efficient hemodialysis.
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