A Compact Device for Urine Collection and Transport in Porous Media

Conference paper
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 644)


We investigate capillary flow in filter paper in compact point-of-care microfluidic devices for transport of liquid samples to sensing pads. Particular challenges were the effects of gravity, unintended capillaries, contamination and evaporation, and the purpose is to investigate solutions to achieve a robust device. On the condition that the liquid sample has sufficient time to saturate the filter paper, the transport of miscible liquid contaminants are mainly left to the mechanisms of diffusion, which was found to provide an inherent resistance to contamination. However, unintended capillaries between the filter paper and a surface provided an increase in the transport rate for both sample and contamination. This was avoided by sealing possible gaps on the sides of the filter paper with adhesive tape, and by applying a force perpendicular to the paper surface to flatten paper and prevent formation of air pockets between the filter paper surface and contacting surfaces.


Biochemistry Capillary flow Point of care Porous media 



Research supported by: Oslofjordfond projects, No: (1) 234972, (2) 249017, (3) 258902, (4) 255893. Research Council of Norway projects, No: (1) 251129, (2) 263783. National Natural Science Foundation of China, No: (1) 61531008, (2) 61550110253. Chongqing Research Program of Basic Research and Frontier Technology: No. cstc2015jcyjBX0004 Science and Technology Research Program of Chongqing Education Commission project, No: (1) KJ15006XX, (2) KJ1600602.


  1. 1.
    Nicolle, L.E.: Urinary tract infections in the elderly. Clin. Geriatr. Med. 25(3), 423–436 (2009)CrossRefGoogle Scholar
  2. 2.
    Hamilton-Miller, J.M.T.: Issues in urinary tract infections in the elderly. World J. Urol. 17(6), 396–401 (1999)CrossRefGoogle Scholar
  3. 3.
    Yoshikawa, T.T.: Unique aspects of urinary tract infection in the geriatric population. Gerontology 30(5), 339–344 (1984)CrossRefGoogle Scholar
  4. 4.
    Newman, D.K.: Incontinence products and devices for the elderly. Urol. Nurs. 24(4), 316–333 (2004)Google Scholar
  5. 5.
    Nicolle, L.E.: Catheter-related urinary tract infection. Drugs Aging 22(8), 627–639 (2005)CrossRefGoogle Scholar
  6. 6.
    Warren, J.W.: Catheter-associated urinary tract infections. Int. J. Antimicrob. Agents 17(4), 299–303 (2001)CrossRefGoogle Scholar
  7. 7.
    Belmin, J., et al.: Reliability of sampling urine from disposable diapers in elderly incontinent women. J. Am. Geriatr. Soc. 41(11), 1182–1186 (1993)CrossRefGoogle Scholar
  8. 8.
    Yetisen, A.K., Akram, M.S., Lowe, C.R.: Paper-based microfluidic point-of-care diagnostic devices. Lab Chip 13(12), 2210–2251 (2013)CrossRefGoogle Scholar
  9. 9.
    De Gennes, P.-G., Brochard-Wyart, F., Quéré, D.: Hydrodynamics of interfaces: thin films, waves, and ripples. In: Capillarity and Wetting Phenomena: Drops, Bubbles, Pearls, Waves, pp. 107–138. Springer (2013)Google Scholar
  10. 10.
    Fries, N., Dreyer, M.: An analytic solution of capillary rise restrained by gravity. J. Colloid Interface Sci. 320(1), 259–263 (2008)CrossRefGoogle Scholar
  11. 11.
    Schwiebert, M.K., Leong, W.H.: Underfill flow as viscous flow between parallel plates driven by capillary action. IEEE Trans. Compon. Packag. Manuf. Technol C 19(2), 133–137 (1996)CrossRefGoogle Scholar
  12. 12.
    Choudhary, A., Kumar, D., Singh, J.: A fractional model of fluid flow through porous media with mean capillary pressure. J. Assoc. Arab Univ. Basic Appl. Sci. 21, 59–63 (2016)Google Scholar

Copyright information

© Springer International Publishing AG 2018

Authors and Affiliations

  1. 1.University College of Southeast NorwayBorreNorway

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