Remaining needle with flow adjuster

Abstract

A remaining needle with a flow adjuster comprises a remaining soft pipe, a remaining needle base, an extending pipe base, an extending soft pipe connected between the remaining needle base and the extending pipe base and a liquid stopping device arranged on the extending soft pipe. The extending soft pipe comprises an outer guiding pipe and an inner pipe. The lower ends of the outer guiding pipe and the inner pipe are connected with the remaining needle base and a liquid inlet respectively. At least one end of the inner pipe and the outer guiding pipe is connected with a liquid outlet of the extending pipe base. The liquid stopping device is arranged at the coinciding position of the outer guiding pipe and the inner pipe and can form continuous positive pressure on the inner pipe. The structure that the extending soft pipe with the outer guiding pipe and the inner pipe and the liquid stopping device with continuous positive pressure are combined is used, the extending soft pipe can be clamped reliably, liquid stopping is formed, the liquid stopping device is used for squeezing the outer guiding pipe, so that the inner pipe is subjected to large-area continuous squeezing, the inner pipe deforms, continuous positive pressure effect is achieved, blood backflow caused by springback siphoning of the extending soft pipe and blood flowing back into the remaining soft pipe caused by blood vessel inner venous pressure fluctuation can be avoided, and the purpose of thrombus preventing is achieved.

Description

technical field [0001] The invention relates to an indwelling needle and belongs to the technical field of medical instruments. Background technique [0002] Existing indwelling needles generally include an indwelling hose, an indwelling needle base, an extension tube base, an extension hose connected between the indwelling needle base and the extension tube base, and a liquid stop clip installed on the extension hose. The liquid stop clamp generally includes a clamp seat and a clip piece integrated on the clamp seat. The clamp seat is placed on the extension hose, and the extension hose can be clamped to form a liquid stop through the cooperation of the clip piece and the clamp seat. However, due to the fact that the existing liquid stop clamp will have a rebound after the clip of the liquid stop clamp is loosened in the process of clamping the extension hose, the original clamped extension hose will form a The elastic rebound causes the blood to flow back into the in...

AI Technical Summary

Problems solved by technology

However, due to the fact that the existing liquid stop clamp will have a rebound after the clip of the liquid stop clamp is loosened in the process of clamping the extension hose, the original clamped extension hose will form a The elastic rebound causes the blood to flow back into the indwelling tube, causing the blood to flow back and form a thrombus, which affects the performance of the indwelling needle

At the same time, because the tip of the indwelling hose is open, pressure fluctuations caused by changes in the patient's breathing and heartbeat will also cause blood backflow and platelets and coagulation substances to enter the indwelling hose, causing coagulation to block the tube, especially due to the hemostatic clip Actively installed on the extension tube, during the process of completing the infusion and stopping the liquid, the liquid stop clip is easy to swing on the indwelling needle seat, causing the liquid in the extension tube to produce a siphon effect and suck the blood in the blood vessel back to the indwelling soft tube. In the tube, the blood backflow will cause thrombus to form, which seriously affects the use time of the indwelling needle. Therefore, the existing indwelling needle can only be used for 1-2 days, and the indwelling needle must be removed and replaced with a new one due to the formation of thrombus.

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