Isolation plug and venous indwelling needle with isolation plug

Abstract

The invention discloses an isolation plug and a venous indwelling needle with the isolation plug. The isolation plug is an elastic body which punctures or is pulled away from a needle tube; after the isolation plug is involved into the needle tube in a puncturing mode, a puncture passage of the needle tube is formed in the isolation plug, is wrapped with the periphery of the needle tube, and has the pressing and holding force on the tube wall of the needle tube, and a gap is reserved between the puncture passage and the tube wall of the needle tube. The isolation plug and the venous indwelling needle have the advantages that the gap is reserved between the puncture passage and the tube wall of the needle tube, the contact area between the tube wall of the needle tube and the puncture passage is reduced through the gap, and therefore the friction force between the needle tube and the wall of the isolation plug is reduced; a passage of the isolation plug has deformation space, the pressing and holding force of the wall of the isolation plug to the needle tube is reduced, and therefore the friction force is further reduced; a lubricating agent exists in the passage, so that the needle tube can be plugged and unplugged more smoothly; the elastic isolation plug is adopted, so that the higher return function is achieved; after the needle tube retreats back, a puncture hole will instantly disappear, and therefore blood backflow and medicine liquid leakage are effectively prevented.

Description

technical field [0001] The invention relates to an isolation plug and an intravenous indwelling needle with the isolation plug, belonging to the technical field of medical devices. Background technique [0002] The use of intravenous indwelling needles can reduce the pain caused by repeated venipuncture of patients and the fear of injections, and reduce the anxiety of family members. [0003] The intravenous indwelling needle is generally composed of a catheter combined with a needle tube set. The catheter set is composed of a catheter base and an infusion tube connector arranged on the catheter base. The needle set is composed of a needle base and a needle tube. The needle tube is inserted into the catheter base. [0004] In the prior art, there is a rubber stopper for needle tube puncture in the catheter base. The material of the rubber stopper is relatively hard. When the needle tube is inserted and pulled out, the friction force between the tube body and the rubber stopp...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, there is a rubber stopper for needle tube puncture in the catheter base. The material of the rubber stopper is relatively hard. When the needle tube is inserted and pulled out, the friction force between the tube body and the rubber stopper is relatively large. It is difficult to insert and pull out, and it will cause micro tremors when inserting and pulling out. , causing discomfort to the patient

Images