| 摘要 |
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. |
