Venous indwelling needle with balanced-pressure connector

Abstract

The invention discloses a venous indwelling needle with a balanced-pressure connector. The venous indwelling needle comprises a needle tube sheath, a catheter assembly, a needle tube assembly, a balanced-pressure connector assembly and the like; and the balanced-pressure connector assembly comprises an interface, a guide ring is arranged in one end of the interface, the guide ring sleeves one endof a silica gel spring, a connector is inserted into the silica gel spring, the connector is connected to the interior of the other end of the interface, and a Luer taper at the other end of the connector is connected to a long catheter connecting base. An infusion connector interface adopts a needleless design; the infusion connector is of a balanced-pressure structure, a constant pressure effectis achieved when the connector is disconnected after infusion is completed, and the catheter blockage risk caused by blood backflow is reduced; an independent and vertical liquid passage is arrangedin the infusion connector and is not in contact with the inner wall of the shell during infusion, so that pipe flushing is more thorough; the dead cavity volume is extremely small, so that liquid retention is reduced; and after disconnection, a catheter in the connector is sealed by the silica gel spring, bacteria are effectively isolated, infection is resisted, the connector is sealed in a disconnected state, and microorganisms cannot enter the cavity.

Description

technical field [0001] The invention relates to a medical device used for venous treatment, in particular to a venous indwelling needle with a flat pressure joint. Background technique [0002] At present, indwelling needles with heparin caps are generally used in the market. During the indwelling period, the heparin cap needs to be punctured for each infusion. Repeated punctures may cause the rubber to fall off and cause foreign matter to block the tube. During the infusion process, the scalp needle of the infusion set needs to be connected, increasing Occupational exposure opportunities such as needlestick injuries for nursing staff. At the same time, the heparin cap is a negative pressure connector. When the needle tip of the infusion set is disconnected from the heparin cap, the liquid and blood will flow back into the indwelling needle. Therefore, a specific tube sealing method is required to prevent the backflow, and the operation is complicated. [0003] The other ty...

AI Technical Summary

Problems solved by technology

[0002] At present, indwelling needles with heparin caps are generally used in the market. During the indwelling period, the heparin cap needs to be punctured for each infusion. Repeated punctures may cause the rubber to fall off and cause foreign matter to block the tube. During the infusion process, the scalp needle of the infusion set needs to be connected, increasing Occupational Exposure Opportunities for Nurses by Needle-Stick Injuries

At the same time, the heparin cap is a negative pressure connector. When the needle tip of the infusion set is disconnected from the heparin cap, the liquid and blood will flow back into the indwelling needle. Therefore, a specific sealing method is required to prevent the backflow, and the operation is complicated.

[0003] The other type used on the market is the positive pressure joint indwelling needle. The joint part is mostly opaque, and the internal conditions of the joint cannot be observed. During the flushing process, it is impossible to directly confirm whether the liquid medicine and blood are washed clean, and infection is more likely to occur; the interior uses a spring Mechanical structure, prone to failure, resulting in short dwell time; also, contains metal inside, which interferes with X-ray inspection

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