Misoperation-preventing medical device for internal extraction and external injection type tympanum puncture and intratympanic injection

Abstract

The invention discloses a misoperation-preventing medical device for internal extraction and external injection type tympanum puncture and intratympanic injection. The misoperation-preventing medicaldevice comprises a first piston, a second piston and a channel switcher. The channel switcher comprises a connector and a switching tube. A sealing plate is arranged in an inner tube located in a basetube cavity. The inner tube is provided with four longitudinal guide sliding grooves extending in the central line direction of the inner tube; the tube wall of the inner tube is provided with an elastic part and a positioning through hole, the first piston comprises a first seal plug and a first pull handle provided with an inwards protruding annular blocking table, the second piston comprises asecond seal plug and a second pull handle, and the outer wall of the second pull handle is provided with positioning convex plates matched with the longitudinal guide sliding grooves. The positioningconvex plates are provided with unlocking gaps and are also provided with containing gaps and elastic clamping hooks, the elastic clamping hooks produce elastic deformation under the effect of an external force and extend into the containing gaps. The misoperation-preventing medical device effectively prevents misoperation.

Description

technical field [0001] The invention belongs to the technical field of ear-nose-throat medical equipment, and in particular relates to an internal pumping and external injection type tympanic membrane puncture and intratympanic injection medical device for preventing misoperation. Background technique [0002] The applicant previously applied for an anti-misuse tympanic membrane puncture and intratympanic injection medical device, which allows the user to aspirate the effusion before injecting drugs during the treatment process, effectively preventing misuse. However, there are also the following disadvantages: due to the limitation of structural design, this kind of injection medical device is used in the external pumping and internal injection type, and it is necessary to use its annular first piston to suck the effusion, and use it to be located at the center of the annular first piston. The second piston injects medicine; in order to provide different usage modes and per...

AI Technical Summary

Problems solved by technology

However, there are also the following disadvantages: due to the limitation of structural design, this kind of injection medical device is used in the external pumping and internal injection type, and it is necessary to use its annular first piston to suck the effusion, and use it to be located at the center of the annular first piston. The second piston injects medicine; in order to provide different usage methods and personal experience, this application provides a medical device for preventing misoperation, internal pumping and external injection type tympanic membrane puncture and intratympanic injection

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