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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.

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References

Figures

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Fig. 1

Currently available AUS (AMS800)

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Fig. 2

Foley catheter (Dover 26 Fr)

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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).

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Fig. 4

The new device in place for women

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Fig. 5

The new device in place for men

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Fig. 6

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

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Fig. 7

Coaxial magnets and geometric parameters

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Fig. 8

COMSOL model: magnetic flux density norm

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Fig. 9

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

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