Anti-mishandling tympanic membrane, intratympanic injection medical device

Abstract

The invention discloses a misoperation-proof tympanic membrane puncture and intratympanic injection medical device, which comprises a first needle, a second needle, a first piston, a second piston and a channel converter; the channel converter includes a connecting head and a conversion tube; The base pipe is provided with four longitudinal guide chutes extending along the center line of the base pipe; the inner pipe is provided with four elastic parts, and each elastic part is provided with a protrusion protruding toward the lumen of the inner pipe; the first piston includes four longitudinal The first handle of the guide limit plate, the inner wall of the first handle is provided with four longitudinal guide positioning plates protruding radially along the base pipe; each longitudinal guide positioning plate is provided with an unlocking gap adjacent to the first sealing plug, each The elastic part can enter into a corresponding unlocking notch; the second piston includes a second pull handle, and the outer wall of the second pull handle is provided with a protruding ring-shaped stop adapted to the lumen of the inner tube. The invention can limit the sequence of actions of the first piston and the second piston in use, effectively preventing misoperation.

Description

technical field [0001] The invention belongs to the technical field of ear, nose and throat medical equipment, and in particular relates to a medical device for tympanic membrane puncture and intratympanic injection to prevent misuse. Background technique [0002] Secretory otitis media is an inflammatory disease of the middle ear characterized by tympanic effusion and hearing loss. 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 a tympanic effusion. Tympanic effusion is mostly a mixture of transudate, exudate, and exudate. Clearing the tympanic effusion is the key to the treatment of secretory otitis media. Myringocentesis is the most commonly used treatment for otitis media, and it is simple and easy to do. Among them, in the treatment of secretory otitis media, it is necessary to insert the needle for the second time to inject medicine after the conventional pun...

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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