Vein duct device capable of performing plugging

Abstract

The invention relates to a vein duct device capable of performing plugging. The vein duct device comprises a needle tube, a needle tube seat, a vein duct, a vein duct seat, a threadlike portable plugging wire, an isolation component, and a guiding passage, wherein the needle tube is used for puncturing skin and vein wall; the needle tube seat is used for enabling the bottom of the needle tube to be fixed in the needle tube seat; the vein duct seat is in sealing connection with an opening in the rear end of the vein duct; the needle tube penetrates through a sealing body on the vein duct seat;the front part of the needle tube is located in a vein duct inner cavity; the front end of the needle tube is exposed from an opening in the front end of the vein duct; the isolation component is usedfor isolating a part of or all of the plugging wire from outside; at least the front end of the guiding passage is a straight pipe shaped part; an opening in the front end of the guiding passage communicates with a vein duct inner cavity directly or through a vein duct seat inner cavity; the plugging wire can pass through the guiding passage to enter the vein duct inner cavity; at least the straight pipe shaped part of the guiding passage is coaxial to the vein duct or can move in an external isolating manner to the position that the central axis of the guiding passage is coincident with thatof the vein duct; and the plugging wire which can be in direct contact with the vein duct seat inner cavity and / or can communicate with fluid, and the guiding passage is isolated from outside.

Description

technical field [0001] The invention relates to a blockable venous catheter device, which belongs to the technical field of medical devices. Background technique [0002] Venipuncture and associated intravenous infusion are the most commonly used general techniques in various clinical departments. When the infusion time is long, flexible venous catheters are most often used to indwell in the venous lumen. During the indwelling period, the flexible venous catheter eliminates the The risk of puncturing the vein with the front end of the rigid needle tube; however, during the indwelling period without drug solution injection, the local blood flow or stagnation in the intravenous catheter and the opening can easily cause blood coagulation, even if the anticoagulant such as heparin is used to seal the tube, Measures such as flushing the catheter with normal saline still cannot prevent the formation of thrombus in the lumen of the venous catheter, and the detachment of the thrombu...

AI Technical Summary

Problems solved by technology

[0005] Patent application 201810470421.9 proposes to block the opening of the front end of the venous catheter through the external isolation of the occluding wire, and smoothly enter the lumen of the venous catheter through the guiding auxiliary occluding wire, but the occluding wire is between the opening of the guiding passage and the rear opening of the venous catheter lumen. The intervening travel is carried out in a free state and there is no coaxial guiding structure, so it is difficult for the occluding wire to enter the lumen of the venous catheter easily

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