Incus prosthesis with adjustable length

Abstract

The invention discloses an incus prosthesis with the adjustable length. The prosthesis comprises a stirrup bone clip. A horizontal connecting rod is arranged at the top of the stirrup bone clip. The connecting rod is provided with a set of lantern rings matched with a stirrup bone in the axial direction in a spaced mode, the connecting rod is provided with a set of annular grooves in the axial direction in a spaced mode, and the annular grooves and the lantern rings are arranged alternately; the stirrup bone is of a five-claw structure; by arranging the annular grooves, the connecting rod canbe broken apart from the position of the annular grooves, and therefore the length of the connecting rod can be changed when an otosteon prosthesis and the incus are connected; accordingly, the positions of the lantern rings can meet the different requirements of various patients; in addition, the stirrup bone clip of the five-claw structure can be more conveniently connected with the stirrup bone, and the degree of tightness is suitable.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a length-adjustable incus prosthesis. Background technique [0002] Due to disease, trauma or congenital deformity, the auditory ossicles of the middle ear (composed of three small bones, also known as the ossicular chain, from outside to inside are: malleus, incus, stapes, and the incus is divided into body, long leg and short leg) Three parts of the foot.The stapes consists of the arch of the stapes and the floor of the stapes, which is in contact with the inner ear perilymph and is the last structure in the middle ear that transmits vibrations to the inner ear) is usually damaged. The most common is damage to the long foot of the incus. If the incus injury results in a discontinuity or fixation between the tympanic membrane and the stapes floor, vibrations from the tympanic membrane cannot be efficiently transmitted to the stapes head, resulting in conductive hear...

AI Technical Summary

Problems solved by technology

[0003] For the case where the long foot of the incus of the ossicle is damaged, a composite structure consisting of a stapes clip and a collar is generally used to form an ossicle chain. The stapes clip is connected to the stapes, and the collar is used to socket the remaining incus; The length of the residual incus is different due to the damage of the incus in each patient. However, the length of the ear bone prosthesis ring is currently fixed, and there are cases where it is too long or too short. If it is not suitable or too short, it will not be able to be socketed at all, and cannot adapt to the different needs of various cases; in addition, the stapes clamp is basically four-claw, seven-claw or eight-claw, and it is too loose or too tight when connected to the stapes Case

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