Patent ID: 8870892

Claim:
A device for puncturing body and introducing catheter, comprising: a puncture needle, said puncture needle having a taper puncture needle head, a puncture needle tail, and a hollow inner cavity that runs through said taper puncture needle head and said puncture needle tail; a guide wire; a peelable catheter sheath, said peelable catheter sheath comprising an outer sheath and an inner sheath inserted into the outer sheath and having an expansible performance, said inner sheath having a hollow internal cavity, said guide wire being able to pass through said hollow internal cavity of said inner sheath; and a puncture protector which comprises: an inner core, said inner core having an inner core head, an inner core tail, and an inner core lumen which runs through said inner core head and said inner core tail; a nut, said nut having a nut lumen which runs therethrough; and a spring, said inner core being surrounded by the spring, one end of the spring abutting against said nut, and the other end of the spring being fixed to said inner core; wherein said inner core head passes through said hollow inner cavity of the puncture needle and is exposed outside of said puncture needle head, and said inner core tail lies within said nut lumen; wherein said guide wire matches with said inner core lumen so as to pass through said inner core lumen; wherein said puncture protector further comprising a protection sleeve which has a protection sleeve lumen running there through, said protection sleeve lumen has a first chamber, a second chamber, and a third chamber, part of said nut is fixedly contained in said first chamber, said spring is telescopically and movably contained in said second chamber, said puncture needle tail is contained in said third chamber and fixed to said third chamber; wherein said inner core contains in said puncture needle, said protection sleeve and said nut.