| 摘要 |
A medical and surgical conduit used to enter a liquid or gaseous medicine, whose main inside diameter formed by the inner rim of the conduit wall, which has an injection opening in the wall of this conduit and at least one non-return set of valves in the wall to facilitate the flow of the liquid in one direction from the injection opening through the conduit wall. Characterized in that: the set of valves in the conduit wall (1) which has an inner injection opening (12) is at least one perforation (10) leaning at an angle other than 90 degrees to the direction of the flow of the liquid passing through the injection opening (12), where the perforation (10) is formed by opposite surfaces, elastically tilted against one another and extending from the injection opening (12) to the outer rim of the conduit wall (1).
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