Patent ID: 6623421
Filing Date: 2003-09-23
Classification: A61F

Abstract:
External magnetically actuated valve for an artificial intraurethral urinary sphincter, comprising:a hollow cylindrical body made of biocompatible material and internally provided with a urine inlet sector and a urine outlet sector communicated by a central orifice, a piston made of a magnetically soft ferromagnetic material coated in a biocompatible material that moves axially within the urine outlet sector of the hollow cylindrical body to open or close the central orifice, an internal permanent magnet with a toroidal shape, magnetically hard, coated in a biocompatible material, placed in the urine inlet sector of the hollow cylindrical body, exerting an attractive force on the piston, and an external permanent magnet that when positioned in close proximity to the piston from outside the body exerts a force on the piston that is greater than the attractive force of the internal permanent magnet and opposite in sense, opening the central orifice and allowing outlet of urine, while when the force of the external permanent magnet on the piston is removed, the piston moves to automatically cover the central orifice and prevent the outlet of urine.