Prosthetic anal sphincter

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/00 (2006.01)

Patent

CA 2106100

A prosthetic anal sphincter (10; 30) is described which is implantable around the upper anal canal (16) to reproduce the action of the sphincter muscles which maintain continence. This is particularly achieved by inflating tubes (24a, b, c; 32; 54) with liquid from a reservoir and creating an angle about 90° between the rectum (14) and the anal canal (16) and by flattening the upper anal canal, in use, by squeezing the posterior wall of the anal canal against the anterior wall. The bending of the anal canal to create an angle of about 90° is important as it creates a "flap valve" which resists the weight of solid faeces within the rectum whilst the flattening of the lumen of the canal produces a seal against the leakage of liquid or gas. Embodiments of the invention are described.

Prothèse de sphyncter anal (10, 30) destinée à être implantée autour du canal anal supérieur (16) afin de reproduire l'action des sphincters qui maintiennent la continence. Ce résultat est obtenu particulièrement en gonflant des tubes (24a, b, c; 32; 54) à l'aide de liquide venant d'un réservoir, en créant un angle d'environ 90 entre le rectum (14) et le canal anal (16) et en aplatissant le canal anal supérieur, à l'utilisation, par une compression de la paroi postérieure du canal anal contre la paroi antérieure. La flexion du canal anal pour créer un angle d'environ 90 est importante car elle crée une "soupape à clapet" qui résiste au poids de selles solides dans le rectum, tandis que l'aplatissage de la lumière du canal produit une fermeture étanche qui empêche la fuite de liquide ou de gaz. Des réalisations de ladite invention sont également décrites.

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