Switching tube for tympanic membrane puncture and intratympanic injection medical device

Abstract

The invention discloses a switch tube in a tympanic membrane puncture and intratympanic injection medical device, including a base tube and a sealing plate fixed at one end of the base tube. One end of the sealing plate is provided with a first sealing part and a second sealing part, and the other end of the sealing plate is provided with an inner tube located in the lumen of the base tube. The outer wall of the inner tube and the inner wall of the base tube are clamped to form a first working chamber, and the lumen of the inner tube forms a second working chamber. The first plugging part is provided with four first switching holes communicating with the first working chamber, and the second plugging part is provided with four second switching holes communicating with the second working chamber. The base pipe is provided with four longitudinal guide chutes extending along the direction of the base pipe centerline on the inner wall of one end of the opening, that is, on the inner wall of one end of the base pipe away from the sealing plate. The wall of the inner tube is provided with four elastic members, each elastic member including a boss protruding toward the lumen of the innertube. The switch tube cooperates with an external component, and can realize the functions of conversion between two channels, anti-misoperation and the like.

Description

Technical field [0001] The invention belongs to the technical field of ear, nose and throat medical equipment, and in particular relates to a conversion tube used in medical devices for tympanic membrane puncture and intratympanic injection. Background technique [0002] Secretory otitis media is an otitis media with tympanic effusion and hearing loss as the main features. The main cause of the disease is the obstruction of the Eustachian tube, and the secretions in the tympanic cavity cannot be drained to the pharynx, forming tympanic effusion. Tympanic effusion is mostly a mixture of leakage, exudate and secretion. Clearing the tympanic effusion is the key to the treatment of secretory otitis media. Aspiration of tympanic effusion is the most commonly used treatment method for otitis media, which is simple and easy to perform. Among them, in the treatment of secretory otitis media, a second needle injection is required after conventional puncture and fluid extraction, and so...

AI Technical Summary

Problems solved by technology

[0005] However, this medical device also has the following disadvantages: when switching between the two functional states of suctioning effusion and injecting drugs, one puncture device needs to be disassembled before another puncture device can be installed, and the operation is relatively cumbersome; In addition, during the conversion operation, the needles of the injection needle and the puncture needle still pass through the tympanic membrane and are located in the tympanic cavity. Such a cumbersome function conversion operation is likely to cause the needle to accidentally pierce other parts of the ear due to hand shaking.

[0006] The applicant previously applied for a medical device for tympanic membrane puncture and intratympanic injection, which can realize the conversion of the two functional states of suctioning effusion and injecting drugs without disassembly and assembly, but there are also the following shortcomings: due to the treatment of this disease The process is basically aspirating first and then injecting. Although the prompt information can be set on the syringe, due to the lack of an anti-misoperation mechanism, the user may still make mistakes in the operation process, that is, injecting first and then aspirating. Misoperation

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