Speech valve

Details Speech valve Speech valve

A - Human Necessities

61

F

A61F 2/20 (2006.01)

Patent

CA 2667433

A speech valve (10) comprises a generally cylindrical body (12, 14, 16) and a closure member (62) which is slidably movable within the body (12, 14, 16) between a closed position and an open position. The valve body and the closure member (62) are formed of a rigid, smooth material which is resistant to the growth of biofilm, such as a ceramic. A particular suitable ceramic is partially stabilised zirconia. The valve body is provided with an outer sleeve (76) which is provided with radially outwardly extending annular flanges (82, 86), which are used to retain the speech valve in a fistula between the oesophagus and the trachea.

La présente invention concerne une valve phonatoire (10) qui comprend un corps généralement cylindrique (12, 14, 16) et un élément d'obturation (62) qui est mobile de manière coulissante à l'intérieur du corps (12, 14, 16) entre une position fermée et une position ouverte. Le corps de valve et l'élément d'obturation (62) sont formés d'un matériau rigide et lisse qui résiste à la croissance d'un biofilm tel que de la céramique. Une céramique particulièrement adaptée est un oxyde de zirconium partiellement stabilisé. Le corps de valve est équipé d'un manchon externe (76) pourvu de brides annulaires qui s'étendent vers l'extérieur de manière radiale (82, 86) et qui servent à retenir la valve phonatoire dans une fistule entre l'AEsophage et la trachée.

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