Medical device for tympanum puncture and intratympanic injection

Abstract

The invention discloses a medical device for tympanum puncture and intratympanic injection. The medical device comprises a first syringe needle, a second syringe needle, a first piston, a second piston and an switching device. The switching device comprises a connector and an switching pipe. The connector comprises a base plate, wherein the base plate is provided with a first through hole and a second through hole. The switching pipe comprises a base pipe and a seal plate. A first plugging portion and a second plugging portion are arranged at one side end of the seal plate, the other side endof the seal plate is provided with an inner pipe located in a pipe cavity of the base pipe. The first plugging portion is provided with a first switching hole communicated with a first working cavity,the second plugging portion is provided with a second switching hole communicated with a second working cavity. In the rotating process of the seal plate with the base pipe, the second plugging portion plugs the second through hole when the first switching hole rotates to be communicated with the first through hole, and the first plugging portion plugs the first through hole when the second switching hole rotates to be communicated with the second through hole. The medical device can complete switching of two function states of hydrops suction and medicine injection only by turning the base pipe to reach a preset angle.

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. 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 puncture, sometimes f...

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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.

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