Design Innovation Paper

Noninvasive Urinary Incontinence Control Device

[+] Author and Article Information
Mahdi Mohammadi

Biomedical Engineering/Advanced Robotics
(BEAR) Laboratory,
Department of Mechanical Engineering,
University of Maine,
Orono, ME 04469
e-mail: mahdi_mohammadi@umit.maine.edu

Mohsen Shahinpoor

Biomedical Engineering/Advanced Robotics
(BEAR) Laboratory,
Department of Mechanical Engineering,
University of Maine,
Orono, ME 04469
e-mail: shah@maine.edu

Manuscript received August 8, 2013; final manuscript received June 14, 2014; published online xx xx, xxxx. Assoc. Editor: Rosaire Mongrain.

J. Med. Devices 8(4), 045001 (Aug 19, 2014) (5 pages) Paper No: MED-13-1191; doi: 10.1115/1.4027870 History: Received August 08, 2013; Revised June 14, 2014

Urinary incontinence (UI) is affecting a large number of men and women around the world and it lowers the quality of life dramatically. A large number of treatments have been introduced, but they require invasive surgeries associated with infections and loss of privacy. In this paper, a novel device is introduced which is designed for permanent or temporary treatment of incontinence in men and women, providing more convenience and control. This design provides a urethral stent having a magnetically controlled valve for patients suffering from incontinence due to diseases like bladder sphincter dyssynergia and neurogenic bladder. The new device provides an effective way for controlling the urination time and voiding the bladder, with a simple design, easy to insert, remove, and operate. In this paper, first a review on the urinary system diseases causing incontinence is presented, and then treatment options, indications for their use, and relevant clinical observation are discussed. Finally, the new device is introduced and its characteristics and applications are addressed.

Copyright © 2014 by ASME
Your Session has timed out. Please sign back in to continue.


Neveus, T., von Gontard, A., Hoebeke, P., Hjälmås, K., Bauer, S., Bower, W., Jørgensen, T. M., Rittig, S., Van de Walle, J., and Yeung, C., 2007, “The Standardization of Terminology of Lower Urinary Tract Function in Children and Adolescents: Report From the Standardization Committee of the International Children's Continence Society (ICCS),” Neurourol. Urodyn., 26(1), pp. 90–102. [CrossRef]
Markland, A. D., Richter, H. E., Fwu, C.-W., Eggers, P., and Kusek, J. W., 2011, “Prevalence and Trends of Urinary Incontinence in Adults in the United States, 2001 to 2008,” J. Urol., 186(2), pp. 589–593. [CrossRef] [PubMed]
Pearle, M. S., Calhoun, E. A., and Curhan, G. C., 2005, “Urologic Diseases in America Project: Urolithiasis,” J. Urol., 173(3), pp. 848–857. [CrossRef] [PubMed]
Parsons, M., and Cardozo, L., 2003, “The Classification of Urinary Incontinence,” Rev. Gynaecol. Pract., 3(2), pp. 57–64. [CrossRef]
Mangera, A., and Chapple, C. R., 2011, “Urinary Incontinence in Adults,” Surgery (Oxford), 29(6), pp. 254–259. [CrossRef]
Carpenter, D. A., and Visovsky, C., 2010, “Stress Urinary Incontinence: A Review of Treatment Options,” AORN J., 91(4), pp. 471–478, quiz 479–481. [CrossRef] [PubMed]
Van der Aa, F., Drake, M. J., Kasyan, G. R., Petrolekas, A., and Cornu, J.-N., 2013, “The Artificial Urinary Sphincter After a Quarter of a Century: A Critical Systematic Review of Its Use in Male Non-Neurogenic Incontinence,” Eur. Urol., 63(4), pp. 681–689. [CrossRef] [PubMed]
Appleyard, D., and Makar, A., 2005, “Prostatic Stents as a Treatment for Benign Prostatic Hypertrophy,” Bus. Brief.: Eur. Pharmacother., pp. 85–89.
Duvdevani, M., Chew, B. H., and Denstedt, J. D., 2006, “Urethral Stents: Review of Technology and Clinical Applications,” Interventional Management of Urological Diseases, Springer, London, ON, Canada, pp. 191–206.
Harrison, M. R., Gonzales, K. D., Bratton, B. J., Christensen, D., Curran, P. F., Fechter, R., and Hirose, S., 2012, “Magnetic Mini-Mover Procedure for Pectus Excavatum III: Safety and Efficacy in a Food and Drug Administration-Sponsored Clinical Trial,” J. Pediatr. Surg., 47(1), pp. 154–159. [CrossRef] [PubMed]
Kim, M.-K., Park, I.-Y., Song, B.-S., and Cho, J.-H., 2006, “Fabrication and Optimal Design of Differential Electromagnetic Transducer for Implantable Middle Ear Hearing Device,” Biosens. Bioelectron., 21(11), pp. 2170–2175. [CrossRef] [PubMed]
Crescini, D., Sardini, E., and Serpelloni, M., 2011, “Design and Test of an Autonomous Sensor for Force Measurements in Human Knee Implants,” Sens. Actuators, A, 166(1), pp. 1–8. [CrossRef]
Ravaud, R., Lemarquand, G., Babic, S., Lemarquand, V., and Akyel, C., 2010, “Cylindrical Magnets and Coils: Fields, Forces, and Inductances,” IEEE Trans. Magn., 46(9), pp. 3585–3590. [CrossRef]
Robertson, W., Cazzolato, B., and Zander, A., 2011, “A Simplified Force Equation for Coaxial Cylindrical Magnets and Thin Coils,” IEEE Trans. Magn., 47(8), pp. 2045–2049. [CrossRef]


Grahic Jump Location
Fig. 1

Currently available AUS (AMS800)

Grahic Jump Location
Fig. 2

Foley catheter (Dover 26 Fr)

Grahic Jump Location
Fig. 3

(a) 3D view. (b) The new device details: (1) control valve block, (2) control valve piston, (3), tube (4), anchoring part, (5) upper and lower metallic rings, (6) valve piston magnet, (7) external magnet, (8) anchoring balloon, (9) balloon saline way, (10) safety valve. (c) Safety valve section view (in gray).

Grahic Jump Location
Fig. 4

The new device in place for women

Grahic Jump Location
Fig. 5

The new device in place for men

Grahic Jump Location
Fig. 6

(a) Device operation procedure and (b) device removal in men (the hook placed is on a cystoscope tip)

Grahic Jump Location
Fig. 7

Coaxial magnets and geometric parameters

Grahic Jump Location
Fig. 8

COMSOL model: magnetic flux density norm

Grahic Jump Location
Fig. 9

Magnetic force between the internal and external magnets: analytical solution and comsol simulation



Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In