Disposable continuous positive pressure remaining needle

Abstract

The invention discloses a disposable continuous positive pressure remaining needle. The remaining needle comprises a catheter assembly and a needle tube assembly which are connected with each other, wherein the catheter assembly comprises a catheter base and a catheter fixed to the far end of the catheter base and used for infusion; the needle tube assembly at least comprises a needle tube base and a needle tube; the near end of the needle tube is inserted into the needle tube base, and the near end of the needle tube and the needle tube base are fixed to each other; the far end of the needletube penetrates through the hollow interior of the catheter and extends out; one side of the catheter base communicates with a connecting assembly used for infusion through a long duct; the connectingassembly comprises an infusion connector and a catheter cap; the head of the catheter cap is an elastic cap made of elastic medical materials; and a flow stopping clamp in flexible contact with the long duct is arranged on the long duct. The remaining needle has the main beneficial effects that the long duct is connected with an expansion part capable of providing continuous positive pressure, sothat liquid medicine in the catheter is kept in a flowing state all the time, and thrombus is prevented from being formed at the top or in the catheter to cause a medical accident.

Description

technical field [0001] The invention relates to the technical field of injection devices, in particular to a disposable continuous positive pressure indwelling needle. Background technique [0002] The use of intravenous indwelling needles can reduce the pain caused by repeated venipuncture and the fear of injections, reduce the anxiety of family members, facilitate clinical medication, rescue medication for acute and critical patients, reduce the workload of nurses, and reduce the pain of patients Therefore, intravenous indwelling needles are widely used in clinical practice. [0003] Chinese patent CN202822325U discloses an intravenous indwelling needle, which includes a catheter assembly, a needle tube assembly and an infusion fluid connector assembly. The catheter assembly includes a three-way catheter adapter and a catheter connected to the front end of the first opening of the three-way catheter adapter. The needle tube assembly includes a needle base sleeved outside ...

AI Technical Summary

Problems solved by technology

[0004] The intravenous indwelling needle in the prior art will be pulled out after the infusion is completed. Since the human vein has a certain blood pressure, the catheter will be in a negative pressure state, and the blood will flow back to the catheter. After a long time, platelets will precipitate and then Promote thrombus formation, or the thrombus may enter the patient's body with the drug solution during the next infusion, causing unnecessary medical accidents

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