3 results about "Ossicular prosthesis" patented technology

The present application relates to the technical field of artificial implant medical device surface modification and middle ear hearing reconstruction, and discloses a processing method for enhancing the fixing stability of an artificial auditory ossicle prosthesis, the prosthesis and application. The method comprises the following steps: after the surface of the auditory ossicle prosthesis in contact with the middle ear tissue is cleaned, a polydopamine layer is formed in a basic dopamine solution, then gelatin, hyaluronic acid or cellulose sulfate is connected to the surface of the polydopamine layer through a carbodiimide activation system to form a viscous functional layer, and the dry sponge-like structure is obtained through freeze-drying. The functional layer can quickly rehydrate and restore the adhesion state after contacting with human blood or tissue fluid, thereby improving the fixing stability of the artificial auditory ossicle prosthesis in the initial implantation stage and reducing the risk of displacement or dislocation.

The utility model relates to the technical field of medical instruments, and provides an ossicular prosthesis for tympanic sclerosis, comprising: an abutting disc for abutting against the tympanic membrane of a patient; one end of the connecting column is connected with the abutting disc, the other end of the connecting column is provided with a safety limiting piece, the end, away from the abutting disc, of the connecting column is used for being inserted into the inner ear vestibule of the patient, and the safety limiting piece is used for limiting the depth of the portion, inserted into the inner ear vestibule of the patient, of the connecting column; wherein the connecting column is provided with at least one winding ring, and the winding ring is used for adjusting the length of the connecting column. In the process of installing the ossicular prosthesis, when the connecting column needs to be lengthened, a doctor can clamp the winding ring through a clamp so that the two ends of the connecting column can be lengthened; when the connecting column needs to be shortened, a doctor can expand the winding ring with a tool to shorten the two ends of the winding ring. Therefore, the technical effect of quickly and conveniently adjusting the length of the connecting column is achieved. The ossicular prosthesis is more adaptive to the in-ear environment of a patient, and the operation efficiency of a doctor is improved.

The invention relates to a combined auditory ossicle prosthesis. The combined auditory ossicle prosthesis comprises a top disc and a connecting rod, the top disc comprises a fixed disc and a detachable outer ring which is detachably connected with the outer ring of the fixed disc; the lower surface of the top disc is provided with a connecting seat assembly extending downwards from the center, and the connecting seat assembly comprises a connecting hole penetrating in the axial direction. The connecting rod is an elastic rod body formed by sequentially and alternately connecting first unit sections and second unit sections with the outer diameters changing alternately in the axial direction. And one end of the connecting rod is detachably connected with the connecting seat assembly through the connecting hole, and can axially move in the connecting hole to adjust the insertion depth. The diameter of the top disc of the prosthesis is adjustable, the length of the connecting rod is graded and adjustable, partial / all replacement operations are interchangeable, a single product covers the requirements of multiple specifications, an operator can accurately and finely adjust according to the requirements in an operation, perfect connection of the prosthesis with a stapedius base plate and a tympanic membrane is achieved, optimal sound transmission mechanical coupling is achieved, and the problems that selection is difficult and models are not matched are fundamentally solved.