CN213635027U

CN213635027U - Human cochlea scala tympani model

Info

Publication number: CN213635027U
Application number: CN202022790390.0U
Authority: CN
Inventors: 王佐; 王小甜; 郭家伟; 季慧玲; 张程林; 王静静
Original assignee: Maanshan College
Current assignee: Maanshan College
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-07-06
Anticipated expiration: 2030-11-26

Abstract

The utility model provides a human cochlea scala tympani model, including the model body, this internal ascending snail form cavity pipeline of spiral that is provided with of model, the entry that is used for implanting artifical cochlea snail form cavity pipeline is offered to model body side, the vertical downwards setting of up end of model body with the cylinder hole that is used for injecting into lubricated liquid with the inside liquid environment of simulation cochlea scala tympani that snail form cavity pipeline top is linked together is provided with. The utility model discloses a human cochlea scala tympani model that 3D printed can separate the scala tympani of cochlea, and accurate reflection cochlea scala tympani size and simulation electrode implantation environment, and can not destroy the cochlea structure, and artifical cochlear electrode implantation training and scientific research experiment before repeatedly usable is capable of real-time observation electrode position and record implantation process, has improved the experiment precision when reducing the experiment cost.

Description

Human cochlea scala tympani model

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to human cochlea scala tympani model.

Background

The cochlea is a component of the auditory organ of the human body in the ear bone maze and is a structure for conducting and sensing sound waves. According to the statistics of the world health organization, 3.6 million people with hearing disabilities are counted all over the world to date, and the number of the hearing disabilities exceeds 5 percent of the total population, wherein 3200 thousands of the hearing disabilities are children.

With the rapid development of science and technology, the artificial cochlea technology has been developed rapidly, and has been put into clinical application from experimental research. The artificial cochlea is the most successful biomedical engineering device at present, and the artificial cochlea is taken as a conventional method for treating severe deafness to total deafness in the global medical field at present, and how to accurately separate the scala tympani from the cochlea and establish a physical model capable of accurately reflecting the structure size is particularly important.

Most of the existing human body cochlear models are made by casting metal into a temporal bone specimen, although the accurate size of a cochlea can be provided, the obtained models cannot be used for cochlear implant experiments, and the model structure is damaged in the manufacturing process, so that the models cannot be reused and the cost is higher; meanwhile, most of the existing human body cochlear models directly generate a cochlear model by using a known mathematical function expression, which embodies the spiral structure of the whole cochlea, does not separate the scala tympani of the cochlea, cannot accurately reflect the size of the scala tympani of the cochlea, and cannot accurately simulate an electrode implantation environment; moreover, the artificial cochlea electrode implantation experiment mainly adopts a human temporal bone specimen for implantation training and experiment, has higher cost and can not record the electrode implantation process and the electrode position.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a human cochlea scala tympani model that can accurate reflection cochlea scala tympani size, accurate simulation electrode implantation environment can reuse simultaneously, reduce cost.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the human cochlear scala tympani model comprises a model body, wherein a spiral upward spiral cavity pipeline is arranged in the model body, an inlet used for implanting an artificial cochlea into the spiral cavity pipeline is formed in the side surface of the model body, and a cylindrical hole communicated with the top of the spiral cavity pipeline and used for injecting lubricating liquid to simulate the liquid environment in the cochlear scala tympani is vertically and downwards arranged on the upper end surface of the model body.

Preferably, the model body is made of a fully transparent material through 3D printing.

Furthermore, the worm-shaped cavity pipeline is obtained by lofting and cutting ellipses with different sizes along the center line of the scala tympani channel.

Preferably, the model body is further provided with a fixing module, and the fixing module is provided with a through hole.

According to the technical scheme provided by the utility model, the utility model discloses a human cochlea scala tympani model that 3D printed can separate the scala tympani of cochlea, and accurate reflection cochlea scala tympani size and simulation electrode implantation environment, and can not destroy the cochlea structure, and artifical cochlear electrode implantation training and scientific research experiment before repeatedly usable is implanted, can observe the electrode position in real time and record the implantation process before the art, has improved the experiment precision when reducing relevant experiment cost.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

in the figure: 1. a model body; 2. a volute cavity conduit; 3. an inlet; 4. a cylindrical bore; 5. a fixed module; 6. and a through hole.

Detailed Description

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

The human cochlear scala tympani model shown in fig. 1 comprises a model body 1, a spiral upward spiral volute cavity pipeline 2 is arranged in the model body, an inlet 3 for implanting an artificial cochlea into the volute cavity pipeline is formed in the side face of the model body, and a cylindrical hole 4 which is communicated with the top of the volute cavity pipeline and is used for injecting lubricating liquid to simulate the liquid environment in the cochlear scala tympani is vertically and downwards arranged on the upper end face of the model body.

The model body 1 of the utility model is made of a fully transparent material through 3D printing, the photosensitive resin material is selected in the preferred embodiment, and the printed model body has high strength and is not easy to deform; the printed cochlear scala tympani model can clearly observe the internal condition of the scala tympani channel, can be used for the preoperative cochlear implant electrode implantation training of doctors, can observe the electrode position and record the implantation process in the cochlear implant electrode implantation process, defines each operation step, reduces the damage to the cochlear wall, finds various problems in the operation and provides a solution, so that the cochlear scalepam model can be better prepared for the operation, reduces the operation risk and protects the residual hearing of patients as much as possible; the device can also be used for being combined with a cochlear implant robot system in scientific research experiments to carry out cochlear implant electrode experiments of the robot and measure the information such as the implantation force, the electrode position and the like of the robot in the implantation process.

In specific use, the human cochlear scala tympani model can be expanded and printed according to a certain proportion so as to adapt to various models of cochlear implant electrodes and different implantation experiment requirements.

In the prior art, cochlear implant surgery is a means for treating severe hearing loss. Clinical results indicate that implantation of an electrode in the scala tympani of one of the two major cavities within the cochlea may lead to better hearing recovery. However, it is reported that up to about 73% of cochlear implant surgeries are capable of complete insertion into the scala tympani. In the remaining 27% of the procedures, the electrode is either inserted completely into the scala vestibuli, or is inserted initially into the scala tympani and then passes through the membranes (basement membrane and scala vestibuli membrane) that separate the scala tympani from the scala vestibuli, which not only results in the failure of the cochlear implant procedure, but also damages the residual hearing of the patient. Thus, the segmentation of the intra-cochlear scala vestibuli and scala tympani may help the physician to better select the implant site and implant angle to maximize the likelihood of successful electrode insertion, which may maximize the recovery of the patient's hearing. However, referring to the cochlear anatomy literature, the average cochlear duct length is 37.1mm, with 17.36 + -0.87 mm of basal abluminal peripheral wall perimeter, 11.65 + -0.20 mm of middle abluminal peripheral wall perimeter, and 8.83 + -0.54 mm of apical abluminal peripheral wall perimeter; the length diameter of the basal peripheral cavity of the cochlea is 8.94 +/-0.21 mm, the diameter of the basal peripheral cavity is 2.34 +/-0.18 mm, and the height of the cochlea is 3.90 +/-0.21 mm. Because the cochlea structure is small, it is difficult to segment the scala tympani from the cochlea and reconstruct the scala tympani.

Since cochlear implant surgery is a very challenging operation, physicians require a great deal of specialized training and have a great deal of clinical experience. Generally, a doctor adopts a cadaver skull standard to perform a cochlear implant electrode experiment, and needs to cut and separate a temporal bone from a skull specimen and then perform an implant operation experiment on the temporal bone. However, such electrode implantation surgery experiments have two disadvantages: firstly, the cochlea structure can be damaged in the process of separating the temporal bone from the skull specimen, so that the experiment cannot be carried out; second, the process of implanting the electrode has very probably because the implantation power is too big and lead to the electrode to damage or cochlear structure suffers destruction, leads to the unable repetitious usage of sample, and the experiment cost increases. The cochlear cavity conduit of the preferred embodiment is obtained by lofting and excising ellipses with different sizes along the central line of the scala tympani channel, separates the scala tympani from the cochlea and establishes an accurate physical model capable of accurately reflecting the structural size of the scala tympani channel, does not damage the cochlear structure, has low model manufacturing cost, and can be repeatedly used for relevant experiments such as electrode implantation and the like.

The model body of the preferred embodiment is further provided with a fixing module 5, the fixing module is provided with a through hole 6, the cochlear scala tympani model is conveniently fixed, the stability of the model is improved, and therefore experimental errors are reduced.

The above-mentioned embodiments are only to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.

Claims

1. The human cochlear scala tympani model is characterized by comprising a model body (1), wherein a spiral upward spiral volute cavity pipeline (2) is arranged in the model body, an inlet (3) for implanting an artificial cochlea into the volute cavity pipeline is formed in the side surface of the model body, and a cylindrical hole (4) communicated with the top of the volute cavity pipeline and used for injecting lubricating liquid to simulate the liquid environment in the cochlear scala tympani is vertically and downwards arranged on the upper end surface of the model body.

2. The human cochlear scala tympani model according to claim 1, wherein the model body (1) is made of a fully transparent material and by 3D printing.

3. The human cochlear scala tympani model according to claim 1, wherein the cochlear cavity canal (2) is obtained by lofting and excising ellipses of various sizes along the centerline of the scala tympani passage.

4. The human cochlear scala tympani model as claimed in claim 1, wherein the model body is further provided with a fixing module (5) provided with a through hole (6).