RU68294U1 - DEVICE FOR PROSTHETIC STRAW JOINTING - Google Patents

Abstract

Usage: medicine, middle ear surgery. SUBSTANCE: device for prosthetics of the anvil-stirrup articulation consists of two tubular parts connected to each other at an angle of 90 degrees, at the bottom of the tubular part there is a tongue curved anteriorly, having the shape of an arc for fixing on the head and arc of the stapes. Technical result: the device improves the stability of prosthetics anvil-stirrup joint.

Description

The utility model relates to medicine, namely to surgery of the middle ear and can be used for restoration and prosthetics when the chain of auditory ossicles is interrupted. Violation of the integrity of the auditory ossicle chain may be due to trauma, a congenital anomaly, or a chronic inflammatory process.

For prostheses anvil-stirrup articulation, a curved polyethylene prosthesis was proposed (Kozlov M.Ya. Surgical rehabilitation of hearing in children / M.Ya. Kozlov. - M .: Medicine, 1981. - P.104, 106.). The disadvantage of this method of prosthetics on the anvil of the stirrup joint is: there is a danger of separation of the joint due to slipping of the prosthesis from the head of the stapes and incomplete restoration of sound conduction through the restored joint due to the impossibility of comparing the articular surfaces of the long process of the anvil and the head of the stapes.

The utility model is aimed at solving the problem of prosthetics of a destroyed anvil-stirrup joint while maintaining optimal sound transmission conditions.

Effect: increase the stability of prosthetics anvil-stirrup joint.

The specified result is achieved using the device for prosthetics anvil-stirrup articulation consisting of two tubular parts connected to each other at an angle of 90 degrees, at the bottom of the tubular part there is a curved anterior tongue in the shape of an arc for fixation on the head and arc of the step, the device allows you to connect a long the process of the anvil with the head of the stapes and is stably fixed by the tongue behind the arc of the stapes.

A useful model is shown in the drawing, in Fig. 1 shows a general view of the device, in Fig. 2 is a side view, in Fig. 3 shows a general view of the device when fixing it on the auditory ossicles.

The device consists of two plastic tubular parts 1 and 2, interconnected at an angle of 90 degrees. Unlike the prototype, a tongue 3 is cut out of the tubular part 2, which is bent anteriorly at an angle of 80-90 degrees, and has the shape of an arc. This device is made of polyethylene.

The device operates as follows. During surgery on the middle ear, the tubular part 1 is put on a long spur of the anvil 4 or its stump, part 2 is put on the head of the stapes 6, the tongue 3 is brought in and fixed on the arch of the stapes 5 from below, while the articular surfaces of the anvil and the heads of the stapes come into contact. Fixation of the tongue of the prosthesis 3 on the arch of the stapes 5 from below holds the device on the stapes and allows you to bring into contact the articular surfaces of the long process of the anvil 4 and the head of the stapes 6, which restores normal sound transmission.

The effectiveness of the proposed tool is confirmed by a good clinical result in 4 patients.

Thus, the proposed device for prosthetics of the anvil-stapes articulation of the auditory ossicle chain allows reconstruction of the destroyed articulation between the long process of the anvil and the head of the stapes and the fixation of the ossicles in the postoperative period.

Claims (1)

A device for prosthetics of the anvil-stirrup joint, consisting of two tubular parts connected to each other at an angle of 90 °, characterized in that the lower tubular part has a curved anteriorly shaped tongue for fixing on the head and arc of the stirrup.