Integrated central venipuncture blue hollow syringe with preset guide wire

Abstract

The invention discloses an integrated central venipuncture blue hollow syringe with a preset guide wire. The blue hollow syringe comprises a blue hollow syringe body, a plastic interlayer, a safety valve, a core rod and a guide wire pusher; the blue hollow syringe body comprises a syringe cylinder and a syringe rubber head, wherein a piston and a push-pull rod which are provided with through holesalong an axis are arranged in the syringe cylinder, and the periphery of the plastic interlayer is hermetically connected with the inner wall of the front end part of the syringe cylinder; a gap is reserved between the front end face of the plastic interlayer and the front end face of the syringe cylinder, and the peripheral part of the plastic interlayer is provided with a communication hole; the safety valve is arranged at the inner center of the plastic interlayer, and the centers of the two end faces of the safety valve are both provided with a hole for the guide wire to penetrate through; the core rod is hollow along an axis and is arranged in the through holes of the piston and push-pull rod, and one end of the core rod is fixedly connected to the rear end face of the plastic interlayer; the guide wire pusher is arranged at the second end of the push-pull rod and previously pushes the guide wire to the end face of the safety valve. The blue hollow syringe body and the guide wirepusher are connected into a whole part, correspondingly the guide wire can be preset in the blue hollow syringe body, and the puncture efficiency is improved.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a one-piece pre-wired central vein puncture blue empty needle. Background technique [0002] Central venous catheterization has a wide range of clinical applications: including volume therapy for critically ill patients, pressure monitoring and application of vasoactive drugs, long-term infusion for cancer patients, chemotherapy, parenteral nutrition, temporary dialysis for renal failure, and central Temporary venous pacing, etc. Central venipuncture is also a skill that clinicians must master. [0003] There are currently two types of central venous needles commonly used: Y-shaped needles and straight blue empty needles. [0004] Using a Y-shaped needle, although the distance from the guide wire to the blood vessel is short, due to the design of the Y-shaped head, it is not conducive to the adjustment of the slope direction of the puncture needle (sometimes when the slope needs ...

AI Technical Summary

Problems solved by technology

However, the distance of the guide wire into the blood vessel is longer (20-22cm), which increases the possibility of guide wire placement failure due to the displacement of the puncture needle

Moreover, the guide wire cannot be preset near the proximal end (the guide wire crossing the safety valve will cause blood to flow out and air to enter)

At the same time, the guide wire pusher of some models cannot be preset on the handle of the push-pull rod of the blue empty needle. During clinical operation, the guide wire pusher is usually connected to the back end of the push-pull rod of the blue empty needle after the puncture needle is withdrawn to draw blood. , which not only delays the time but also increases the probability of failure of the puncture needle displacement guide wire

In addition, the inner diameter of the push-pull rod of the blue empty needle is inconsistent with the inner diameter of the metal core rod. When the guide wire is inserted from the rear end of the push-pull rod, jamming may occur at the connection between the push-pull rod and the core rod, which will affect the insertion operation of the guide wire.

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