Anti-misuse internal suction and external injection type tympanic membrane puncture and intratympanic injection medical device

Abstract

The invention discloses an anti-misoperation medical device for tympanic membrane puncture and intratympanic injection with internal extraction and external injection, which comprises a first piston, a second piston and a channel converter; the channel converter includes a connecting head and a conversion tube; The inner tube located in the lumen of the base tube; the inner tube extends along the center line of the inner tube with four longitudinal guide chute; the wall of the inner tube is provided with an elastic member and a positioning through hole, the first piston includes a first sealing plug and A first pull handle with an inwardly protruding annular stop; the second piston includes a second sealing plug and a second pull handle, and the outer wall of the second pull handle is provided with a positioning convex plate adapted to the longitudinal guide chute; Each positioning convex plate is provided with an unlocking gap, and each positioning convex plate is also provided with a receiving gap and an elastic hook, and each elastic clip is elastically deformed under the action of an external force and extends into the receiving gap. The invention 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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