Anti-misoperation tympanocentesis and intratympanic injection medical device

Abstract

The invention discloses an anti-misoperation tympanocentesis and intratympanic injection medical device. The anti-misoperation tympanocentesis and intratympanic injection medical device comprises a first needle head, a second needle head, a first piston, a second piston and a channel converter. The channel converter comprises a connector and a conversion tube. A base tube is provided with four longitudinal guide sliding grooves extending in the direction of the center line of the base tube. An inner tube is provided with four elastic pieces, and each elastic piece is provided with a boss protruding towards a tube cavity of the inner tube. The first piston comprises a first pull handle provided with four longitudinal guide limiting plates, and four longitudinal guide positioning plates protruding in the radial direction of the base tube are arranged on the inner wall of the first pull handle. An unlocking notch is formed in the position, adjacent to a first sealing plug, of each longitudinal guide positioning plate, and each elastic piece can enter the corresponding unlocking notch. The second piston comprises a second pull handle, and a protruding annular blocking table matched with the tube cavity of the inner tube is arranged on the outer wall of the second pull handle. The action sequence of the first piston and the second piston in use can be limited, and misoperation is effectively prevented.

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

Images