A medical convenient positive pressure indwelling needle

Abstract

The invention provides a medical convenient positive pressure indwelling needle. The positive pressure indwelling needle includes a puncture needle, a catheter, an extension tube, an infusion line, and a water stopper. The pulley, the toothed pulley has a plurality of protruding teeth arranged on its circumferential surface and the axle extending along its central axis, the axle groove is arranged in the body along the length direction of the extension pipe passage, the axle of the toothed pulley is installed in the axle groove and Able to move back and forth along the axle groove, and the structure of the water stopper is arranged such that as the axle of the toothed pulley moves forward in the axle groove, the distance between the axle of the toothed pulley and the extension pipe located in the extension pipe passage becomes smaller, Until the protruding teeth of the toothed pulley are fully pressed against the section of the extension tube located in the extension tube channel. The advantages of the present invention include: good tube sealing effect, convenient operation, good indwelling effect, good safety and the like.

Description

technical field [0001] The invention relates to the technical field of medical indwelling needles, in particular to a medical positive pressure indwelling needle with convenient operation. Background technique [0002] At present, medical indwelling needles (also known as venous indwelling needles or venous trocars) are commonly used equipment for infusion therapy. The core components of conventional medical indwelling needles include soft catheters that can be indwelled in blood vessels, and stainless steel puncture guide cores. When in use, the catheter and the needle core are punctured into the blood vessel together. After the catheter has completely entered the blood vessel, the needle core is withdrawn, and only the soft catheter is left in the blood vessel for infusion therapy. [0003] For example, figure 1 A schematic structural view of a medical indwelling needle commonly used in the prior art is shown. Such as figure 1 As shown, a typical medical indwelling nee...

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Problems solved by technology

[0004] However, for figure 1 As far as the medical indwelling needle is concerned, since the water-stop clamp 4 needs to squeeze the extension tube with your fingers until the thin end of the water-stop clamp is clamped when sealing the tube, a negative pressure will be formed in the lumen after letting go, which will easily cause blood to flow back into the tube. Catheters, clots form to block the tubes and cannot be reused, and even when the indwelling needle is reused, the clots can be injected into the patient's vein, causing danger

In addition, since the water stop clamp 4 must push the extension tube with both hands in accordance with the method of "pushing while retreating, pulling out the needle with fluid", "hands upside down, fingertips pressurized", if a good positive pressure is required The tube sealing effect must be implemented strictly in accordance with the requirements, the operation is cumbersome, and a good positive pressure effect cannot be guaranteed, and the fineness of the operation is required to be high

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