In-vivo monitoring type central venous indwelling catheter with pressure monitoring function

The invention discloses an in-vivo monitoring type central venous catheter with a pressure monitoring function, which comprises a catheter body, one side of the catheter body is connected with a puncture head, the catheter body is movably sleeved with a sleeve, and an elastic connecting piece is connected between the sleeve and the puncture head. An extrusion mechanism is connected between the catheter body and the sleeve, and the extrusion mechanism is arranged on the side, away from the puncture head, of the catheter body. The sleeve is extruded to move through the extrusion mechanism, the elastic connecting piece is extruded when the sleeve moves, the inner side of the elastic connecting piece is attached to the indwelling catheter body, when the elastic connecting piece is extruded, the elastic connecting piece hunches outwards, and a puncture head on the indwelling catheter body can be relatively fixed to a blood vessel through the hunched elastic connecting piece; the swing of the puncture head is effec