Pericardium puncture needle assembly

Abstract

A pericardium puncture needle assembly comprises a puncture needle () and a guide wire () capable of sliding in the puncture needle (); or comprises an outer sleeve () and a guide wire () capable of sliding in the outer sleeve (); or comprises an outer sleeve () and a puncture needle () and a guide wire () capable of sliding in the outer sleeve (), wherein after the puncture needle () is pulled out of the outer sleeve (), the guide wire () is capable of sliding in the outer sleeve (). The guide wire () is made of a highly elastic material and comprises a far-end bent segment (). The far-end bent segment () is formed by bending the guide wire () and has a preset bending shape, and is suitable for being recovered from a stretching state to the preset bending shape. The tip of the far-end bent segment has a pointed structure. The pointed structure has a far end and a near end, the far-end has a pointed end for puncturing, and the pointed end rotates by an angle of at least 90 degrees relative to the near end of the pointed structure on a length not more than 3 mm of the pointed structure. The puncturing direction of the guide wire () falls in a plane defined by a normal direction of a needle point plane of the puncture needle () or the outer sleeve () and an axial line of the puncture needle () or the outer sleeve (). When the pericardium puncture needle assembly is used for puncturing pericardium, the degree of twisting freedom of the guide wire () can be limited to some extent.