CN-116196141-B - Prosthesis for ossicular chain reconstruction

CN116196141BCN 116196141 BCN116196141 BCN 116196141BCN-116196141-B

Abstract

The invention relates to a prosthesis for reconstructing ossicular chain, which is used for replacing or bridging at least one element of ossicular chain of human, and comprises a first coupling unit, a second coupling unit and a connecting piece, wherein the first coupling unit is arranged at a proximal end and is used for being matched with a tympanic membrane and receiving vibration caused by sound, the second coupling unit is arranged at a distal end and is mechanically connected with stapes, the connecting piece is connected between the first coupling unit and the second coupling unit and is used for transmitting vibration energy, the connecting piece is made of a material with deformation capability, so that the connecting piece can be bent back and forth to adjust an angle, and the first coupling unit is a spiral coil disc. The invention has the advantages that the first coupling unit is a spiral coil disk, the spiral structure of the first coupling unit is easy to adjust the shape according to the requirement in operation, and the displacement and the extraction of the first coupling unit are reduced, in addition, the connecting piece is made of a material with deformation capability, the first coupling unit is easy to adjust in operation, the prosthesis does not need to be additionally replaced or cut, the operation time is reduced, the continuous tension can be kept, and the risk of the displacement and the extraction of the prosthesis is reduced.

Inventors

HONG YONGJUN
CHEN JINWEI
CHEN CHANGQUAN
LIU CHONGBING

Assignees

伽俐略(厦门)科技有限公司

Dates

Publication Date: 20260512
Application Date: 20221208

Claims (4)

1. A prosthesis for the reconstruction of the ossicular chain for the replacement or bridging of at least one element of the ossicular chain of a human comprising The first coupling unit (1) is arranged at the near end and is used for being matched with the tympanic membrane and receiving vibration caused by sound; A second coupling unit (2) arranged at the distal end and mechanically connected to the stapes, and The connecting piece (3) is connected between the first coupling unit (1) and the second coupling unit (2) and is used for transmitting vibration energy; The connecting piece (3) is made of a material with deformation capability, so that the connecting piece (3) can be bent back and forth to adjust the angle; The first coupling unit (1) is a spiral coil panel; The connecting piece (3) is a spiral coil (31) extending along the far and near directions, and the outer diameter of the spiral coil (31) decreases from the middle part to the two ends.
2. A prosthesis for ossicular chain reconstruction according to claim 1, wherein the second coupling unit (2) is a plurality of arc-shaped rods (24) distributed in a ring-shaped array, the plurality of arc-shaped rods (24) together forming a hood-shaped profile with an opening facing distally.
3. A prosthesis for ossicular chain reconstruction according to claim 1, wherein the second coupling unit (2) is a plurality of connection strips (25) in a ring-shaped array, the ends of the connection strips (25) are provided with distally extending gripping tabs (26), and the plurality of groups of connection strips (25) and the gripping tabs (26) together form a structure with a cover-shaped outline and with an opening facing distally.
4. A prosthesis for ossicular chain reconstruction according to claim 3, wherein the inner side wall of the grip tab (26) is provided with anti-slip texture (23).

Description

Prosthesis for ossicular chain reconstruction Technical Field The invention relates to the field of medical appliances, in particular to a prosthesis for ossicular chain reconstruction. Background The human hearing function is mainly achieved by transmitting sound waves to the inner ear through the middle ear of the external auditory canal. The middle ear cavity is filled with the minimum bone of human body, namely ossicle, which consists of hammer bone, incus bone and stapes bone, and the three bones are hooked into a chain, namely ossicular chain. The ossicular chain transmits sound vibrations and amplifies the sound 22 times into the inner ear. The cochlea filled with lymph fluid plays a role of a transducer to convert sound energy into electric pulse, and the electric pulse is transmitted to the brain through the cochlear nerve finally. Ossicular chain destruction, such as chronic suppurative otitis media, is a common middle ear disorder in which destruction or immobilization of the ossicular chain occurs, and acoustic signals are not transmitted or incompletely transmitted to the inner ear, resulting in conductive hearing loss. The clinical treatment mode is to clear middle ear focus and reconstruct ossicular chain with artificial ossicular prosthesis. Because of certain individual differences of middle ear structures and sizes of each patient in a practical environment, the middle ear structures are deep, small and complex, the determination of the implantation length of the ossicular prosthesis depends on personal experience of doctors to a great extent, most ossicular prostheses are fixed at present, the angle is often fixed and not adjustable, and moderate adjustment is difficult to be made in operation so as to perfectly adapt to the individual differences of the patients. CN213250050U discloses an auditory ossicle prosthesis, although he gives the prosthesis body (20) a reciprocating bending structure, a rod-shaped structure is adopted, material fatigue is easy to generate and break in the repeated bending process, and in addition, the rod-shaped structure needs to take great effort of doctors when bending. In addition, the connection tightness between the existing auditory ossicle prosthesis and the stapes is not easy to control, and if the connection tightness is too tight, the stapes necrosis can be caused, and the auditory ossicle prosthesis is easy to fall off when the connection tightness is too loose. The operation requires that cartilage is filled between ossicles and tympanic membranes for repairing the tympanic membranes, and the placement positions of the ossicles are different in angles due to individual differences of patients, so that cartilage cannot be well attached to ossicle prostheses, and the conduction of sound waves is affected. Reconstruction requires proper tension between the tympanic membrane and the stapes, i.e., requires a length of the ossicular prosthesis and a high fit of the middle ear structure of the patient. In addition, the position of the prosthesis tray needs to be easily adjustable to accommodate adequate fit of the cartilage pad to the ossicular prosthesis. Disclosure of Invention The invention aims to provide a prosthesis for ossicular chain reconstruction, which has the characteristics of easy adjustment of an intraoperative structure and difficult displacement after operation. The object of the invention is achieved in that a prosthesis for ossicular chain reconstruction for substitution or bridging of at least one element of the ossicular chain of a human comprises A first coupling unit 1 disposed at the proximal end for cooperating with the tympanic membrane and receiving vibrations caused by sound; A second coupling unit 2, arranged distally and mechanically connected to the stapes, and A connecting member 3 connected between the first coupling unit 1 and the second coupling unit 2 for transmitting vibration energy; the connecting piece 3 is made of a material with deformation capability, so that the connecting piece 3 can be bent back and forth to adjust the angle; the first coupling unit 1 is a spiral coil disc. Wherein, the connecting piece 3 is a spiral coil 31 extending along the far and near directions. The outer diameter of the spiral coil 31 decreases from the middle to both ends. The second coupling unit 2 is a plurality of arc rods 24 distributed in an annular array, and the plurality of arc rods 24 together form a structure with a cover-shaped outline and an opening facing the distal end. The second coupling unit 2 is a plurality of connection strips 25 in a ring array, the ends of the connection strips 25 are provided with gripping sheets 26 extending towards the distal end, and a plurality of groups of connection strips 25 and the gripping sheets 26 jointly form a structure with a cover-shaped outline and an opening facing the distal end. Further, the inner side wall of the gripping sheet 26 is provided with anti-slip lines. Compared with