Prothesis for preventing the gastric reflux in the oesophagus

Details Prothesis for preventing the gastric reflux in the oesophagus Prothesis for preventing the gastric reflux in the oesophagus

A - Human Necessities

61

F

3/141

A61F 2/02 (2006.01) A61F 2/04 (2006.01) A61F 2/24 (2006.01) A61F 2/00 (2006.01)

Patent

CA 2035903

The prosthesis is configured like an anti-return valve arranged preferably in the area where the oesophagus and the hiatal hernia meet. Said valve is comprised of a tubular part (7) associated with an annular fixing element (8). The tubular part flatens progressively to form two joined lips (9, 10). It is possible to form said valve with a wall thickness which increases from the free end of the lips (9 and 10) towards the annular fixing part (8) in order to avoid an easy returning under the effect of the surging pressure. During the passage of the alimentary bolus, the lips (9, 10) are spaced apart and joined again owing to their natural elasticity. A metal wire (16) embedded in the annular fixing part (8) is used for the radiologic marking.

Cette prothèse a la forme d'une valve anti-retour disposée de préférence dans la zone où l'oesophage et l'hernie hiatale se rejoignent. Cette valve comporte une partie tubulaire (7) associée à un élément annulaire de fixation (8). La partie tubulaire s'aplatit ensuite progressivement pour former deux lèvres jointives (9, 10). II est possible de former cette valve avec une épaisseur de paroi qui augmente de l'extrémité libre des lèvres (9 et 10) en direction de la partie annulaire de fixation (8) pour éviter le retournement trop facile sous l'effet de la pression de reflux. Lors du passage du bol alimentaire, les lèvres (9, 10) s'écartent puis se rejoignent grâce à leur élasticité naturelle. Un fil métallique (16) noyé dans la partie annulaire de la fixation (8) sert au repérage radiologique.

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