Sterilization pin

Abstract

The invention discloses a sterilization pin which is high in success rate, easy to place and small in human body side effect. The sterilization pin comprises at least one sheet and a guiding rod. The sheets are made of TiNi alloy. The guiding rod is made of stainless steel. The guiding rod is welded to the center of the two faces of the sheets. The guiding rod can be conveniently placed into an intramural part of uterine tube, and the sheets can be uniformly embedded into the skin layer, so that the sterilization pin is not moved or disengaged, combination of sperms and eggs can be effectively avoided, and the sterilization effect is achieved. The sheets and the guiding rod are made of different materials, it is ensured that the shapes of the sheets can be changed when temperature is changed and the shape of the guiding rod is not changed when the temperature is changed, and therefore the high requirement for shape and dimension precision, processing technology and the like is not needed. The sterilization pin is simple in structure, easy to manufacture and low in cost.

Description

technical field [0001] The invention relates to a sterilization plug, in particular to a sterilization plug placed in the interstitium of the fallopian tube. Background technique [0002] Hysteroscopic tubal sterilization has broad application prospects because it does not require an operation on the human abdomen, avoiding abdominal incision and internal organ damage. Chinese patent 201020118979.X discloses a sterilization plug made of shape memory alloy, which includes a guide rod, a connecting bracket, a ring bracket and a film adhered to the ring bracket and the connecting bracket. In this patent, when the temperature is suitable, the radial stent can be closed along the axial direction of the fixed side of the guide rod. After being placed in the interstitial part of the fallopian tube, when the temperature changes, the radial stent unfolds so that the outer edge of the annular stent is embedded in the muscle layer and adheres to the stent. The thin film prevents sperm...

AI Technical Summary

Problems solved by technology

The structure of this patent is complicated and the cost is high. Due to the resistance effect of the film adhered to the annular bracket and the link bracket, it is necessary to ensure that the bracket is closed in the axial direction on the side where the guide rod is fixed and can be unfolded evenly and try to maintain the shape, deformation action and The strength is consistent, so the requirements for the material of the bracket, the accuracy of the shape and size, and the processing technology are high, and the bracket and the guide rod are made of the same material, which is an inseparable whole. It is difficult to exercise the memory function of the bracket. In addition, the film is easily deformed and cannot Completely Guaranteed Contraceptive Effect

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