Pericardiocentesis needle component

Abstract

Disclosed is a pericardiocentesis needle component ( 10 ), comprising a guide wire ( 13 ) and a puncture needle ( 12 ). The guide wire ( 13 ) extends into and through the puncture needle ( 12 ), and the guide wire ( 13 ) comprises a bent section ( 32 ) at the distal end and a straight section at the proximal end. The bent section ( 32 ) at the distal end is formed by bending the guide wire ( 13 ), and the end of the bent section is a pointed-shape structure. The guide wire ( 13 ) is made of a highly elastic material. The pointed end rotates at least 90 degrees within a range of no more than 3 mm starting from the pointed end at the bent section ( 32 ) of the guide wire. The pericardiocentesis needle component ( 10 ) of the present disclosure is less likely to damage a heart during a pericardiocentesis procedure.

1 . A pericardium puncture needle assembly, characterized in comprising a guide wire and a puncture needle, wherein the guide wire extends within the puncture needle, the guide wire has a curved distal section and a straight proximal section, the curved distal section is formed by bending the guide wire, the tip end of the curved distal section is a sharp tip structure, the guide wire is made from highly elastic material, the sharp tip bends at least 90 degrees within a length range of no more than 3 mm starting from the sharp tip of the curved distal section of the guide wire. 
     
     
         2 . The pericardium puncture needle assembly of  claim 1 , characterized in that the sharp tip bends at least 90 degrees within a length range of 1-2 mm starting from the sharp tip of the curved distal section of the guide wire. 
     
     
         3 . The pericardium puncture needle assembly of  claim 1 , characterized in that within a length range of no more than 3 mm starting from the sharp tip, the sharp tip structure comprises a curved section, which has a curvature radius of less than 2 mm. 
     
     
         4 . The pericardium puncture needle assembly of  claim 1 , characterized in that after the sharp tip bends 90 degrees, a curved shape, starting from the proximal end of the sharp tip structure, of the curved distal section is involute curve, helix curve, or irregular curve. 
     
     
         5 . The pericardium puncture needle assembly of  claim 2 , characterized in that after the sharp tip bends 90 degrees, a curved shape, starting from the proximal end of the sharp tip structure, of the curved distal section is involute curve, helix curve, or irregular curve. 
     
     
         6 . The pericardium puncture needle assembly of  claim 4 , characterized in that after the sharp tip bends 90 degrees, the curved shape, starting from the proximal end of the sharp tip structure, of the curved distal section is involute curve or helix curve with a curvature radius increasing gradually or stepwise. 
     
     
         7 . The pericardium puncture needle assembly of  claim 5 , characterized in that after the sharp tip bends 90 degrees, the curved shape, starting from the proximal end of the sharp tip structure, of the curved distal section is involute curve or helix curve with a curvature radius increasing gradually or stepwise. 
     
     
         8 . The pericardium puncture needle assembly of  claim 4 , characterized in that after the sharp tip bends 90 degrees, the curved shape, starting from the proximal end of the sharp tip structure, of the curved distal section is irregular curved shape including at least one curved section. 
     
     
         9 . The pericardium puncture needle assembly of  claim 8 , characterized in that the curved shape, starting from the proximal end of the sharp tip structure, of the curved distal section includes a first curved section and a second curved section. 
     
     
         10 . The pericardium puncture needle assembly of  claim 9 , characterized in that the curvature radius of the first curved section is not greater than 1.5 mm, and the curvature radius of the second curved section is not greater than 2 mm. 
     
     
         11 . The pericardium puncture needle assembly of  claim 1 , characterized in that a part of the curved distal section extending from the proximal end of the sharp tip structure to the proximal end of the guide wire is in cylindrical shape, which has a diameter of 0.2-1 mm. 
     
     
         12 . The pericardium puncture needle assembly of  claim 1 , characterized in that a part of the curved distal section extending from the proximal end of the sharp tip structure to the proximal end of the guide wire is in flat sheet shape, which has a width of 0.2-1 mm. 
     
     
         13 . The pericardium puncture needle assembly of  claim 2 , characterized in that a part of the curved distal section extending from the proximal end of the sharp tip structure to the proximal end of the guide wire is in flat sheet shape, which has a width of 0.2-1 mm. 
     
     
         14 . The pericardium puncture needle assembly of  claim 5 , characterized in that a part of the curved distal section extending from the proximal end of the sharp tip structure to the proximal end of the guide wire is in flat sheet shape, which has a width of 0.2-1 mm. 
     
     
         15 . The pericardium puncture needle assembly of  claim 1 , characterized in that the distal end of the puncture needle has a structure without a needlepoint. 
     
     
         16 . The pericardium puncture needle assembly of  claim 2 , characterized in that the distal end of the puncture needle has a structure without a needlepoint. 
     
     
         17 . The pericardium puncture needle assembly of  claim 1 , characterized in that the puncture needle is formed by connecting two tubes, one is the distal end tube and the other is the proximal end tube, the diameter of the distal end of the puncture needle is smaller than the diameter of its proximal end, the inner diameter of the proximal end of the puncture needle is 0.5-2.5 mm, and the inner diameter of its distal end is 0.2-1.5 mm. 
     
     
         18 . The pericardium puncture needle assembly of  claim 1 , characterized in that a sheath is disposed inside the puncture needle, and the guide wire extends within the sheath. 
     
     
         19 . The pericardium puncture needle assembly of  claim 1 , characterized in that a negative pressure device is fixed at the proximal end of the puncture needle. 
     
     
         20 . The pericardium puncture needle assembly of  claim 1 , characterized in that an outer sheath is nested outside the puncture needle, and the distal end of the outer sheath is in a spherical structure.