| 摘要 |
The invention concerns a gastric ring (1) consisting of a flexible strip designed to be closed by closure means around a patient's stomach, said strip comprising an annular compression chamber (7) connected by a catheter (9) to a device for adjusting the diameter of the said chamber by fluid injection or withdrawal, said chamber comprising a dorsal reinforcement (12) extended by lateral walls (13), the dorsal reinforcement (12) being made from a first elastomeric material having a predetermined Shore A hardness d1 and the lateral walls (13) being made of a second elastomeric material of the same type as the first material but with predetermined Shore A hardness d2, such that d2<d1, so as to obtain a single-piece annular chamber (7) of variable Shore A hardness in its thickness. The invention is useful device for treating obesity.
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