CN219126895U - Bipolar head test mould - Google Patents

Abstract

The application discloses bipolar head examination mould belongs to medical instrument technical field, and the port part of this bipolar head examination mould is through setting up outer inclined plane to along the direction of keeping away from outer sphere, outer inclined plane is drawn close towards the internal surface of port part, makes port part present the structure of gradually thinning along the direction of keeping away from main part roughly, and the material that is close to the opening part is thinner more easily by crowded development give birth to elastic deformation, thereby need not to just can realize the installation and the dismantlement of interior ball examination mould with the help of special instrument again, and then can promote the dismouting efficiency of interior ball examination mould.

Description

Bipolar head test mould

Technical Field

The application belongs to the technical field of medical equipment, and particularly relates to a bipolar head test die.

Background

Semi-hip arthroplasty, which originates in the last 30 th century, is a surgical procedure for restoring the basic function of a patient's joint by replacing the femoral side of the patient, and has been widely used in indications such as fractures of the femoral neck. The main surgical steps for a semi-hip replacement are: opening the hip joint, cutting off and resecting the femoral head, reaming the intramedullary canal file, installing the trial neck and the bipolar head trial mould, resetting, installing the prosthesis and resetting suture. The installation of the bipolar head test mold for reduction is particularly important in judging the stability of the hip joint, and when an operator finds that the stability is insufficient, the size of the bipolar head test mold and the size of the ball head test mold matched with the bipolar head test mold can be adjusted at any time. The main functions of the test die of the bipolar head are as follows: 1. simulating the matching degree of the real bipolar head and the acetabular fossa; 2. simulating the tightness degree of the postoperative muscle of a patient; 3. the mobility of the hip joint of the patient after operation is simulated.

The existing bipolar head test mould is mainly divided into an internal clamping ring and an external clamping ring, the main bodies of the two structures are a bipolar head body and a clamping ring structure, the clamping ring structure positions of the two structures are different, and the main functions are locking and limiting the movement of an inner ball in the bipolar head. The two test molds can be assembled or disassembled by means of special tools, and meanwhile, due to limited visual field exposure in the semi-hip operation process, the corresponding tools can increase the operation difficulty of operators and prolong the operation time.

Disclosure of Invention

The utility model aims to: the embodiment of the application provides a bipolar head test die, aims at solving the technical problem that the bipolar head test die in the prior art can be installed or detached only by means of special tools.

The technical scheme is as follows: the bipolar head test die of the embodiment of the application comprises:

the test die comprises a test die body, wherein the test die body comprises a main body part and a port part, the main body part is connected with the port part to enclose a containing cavity, one end of the port part, which is far away from the main body part, encloses an opening, and the containing cavity is communicated with the opening; the main body part comprises an outer spherical surface, the port part comprises an outer inclined surface connected with the outer spherical surface, and the outer inclined surface is close to the inner surface of the port part along the direction away from the outer spherical surface;

and the locking piece is arranged in the accommodating cavity and extends along the circumferential direction of the inner surface of the port part.

In some embodiments, the thickness of the port portion is less than the thickness of the body portion.

In some embodiments, the body portion includes an inner spherical surface having a diameter greater than an inner diameter of the locking element.

In some embodiments, the inner surface of the port portion includes a bearing surface on a side of the locking element remote from the inner spherical surface.

In some embodiments, the receiving cavity has a central axis passing through the center of the inner spherical surface, and the minimum distance L between the abutment surface and the central axis satisfies: d > 2L > D;

wherein D is the diameter of the inner sphere, and D is the inner diameter of the locking piece.

In some embodiments, the trial body is provided with a slot through the inner and outer surfaces of the trial body, and the slot extends from an end of the port portion remote from the main body portion toward the main body portion.

In some embodiments, the notch is provided with a plurality of notches, and the plurality of notches are arranged at intervals along the circumferential direction of the test die body.

In some embodiments, the port portion is provided with a receiving groove extending circumferentially along an inner surface of the port portion, the locking member being embedded within the receiving groove.

In some embodiments, the locking member is a resilient locking member; and/or the number of the groups of groups,

the locking piece is a spring or an O-shaped rubber ring.

In some embodiments, the trial body is a unitary structure.

The beneficial effects are that: compared with the prior art, the bipolar head test die comprises a test die body, wherein the test die body comprises a main body part and a port part, the main body part is connected with the port part to enclose a containing cavity, one end of the port part, which is far away from the main body part, encloses an opening, and the containing cavity is communicated with the opening; the main body part comprises an outer spherical surface, the port part comprises an outer inclined surface connected with the outer spherical surface, and the outer inclined surface is close to the inner surface of the port part along the direction away from the outer spherical surface; and the locking piece is arranged in the accommodating cavity and extends along the circumferential direction of the inner surface of the port part. The port part of the bipolar head test die is provided with the outer inclined surface, and the outer inclined surface is close to the inner surface of the port part along the direction far away from the outer spherical surface, so that the port part approximately presents a gradually thinned structure along the direction far away from the main part, the material near the opening part is thinner and is easier to be extruded and developed to generate elastic deformation, the installation and the disassembly of the inner ball test die can be realized without using a special tool, and the disassembly and assembly efficiency of the inner ball test die can be improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic perspective view of a bipolar head test mold according to an embodiment of the present application;

FIG. 2 is a schematic perspective view of a test body of the bipolar head test of FIG. 1;

FIG. 3 is a schematic diagram of the front view of the bipolar head mold of FIG. 1;

FIG. 4 is a schematic cross-sectional view of the bipolar head test mold of FIG. 1;

FIG. 5 is a schematic diagram of the assembled state of the inner ball test mold and the bipolar head test mold;

FIG. 6 is a schematic illustration of an intermediate state of assembly of an inner ball test pattern and a bipolar head test pattern;

reference numerals: 100-testing the body of the die; 110-a body portion; 111-outer sphere; 112-an inner sphere; a 120-port portion; 121-supporting surface; 122-outer bevel; 130-a receiving chamber; 140-opening; 150-notch; 160-a receiving groove; 200-locking piece; 300-inner ball test.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

In the description of the present application, it should be understood that the terms "thickness," "upper," "lower," "left," "right," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality" is two or more, and at least one means may be one, two or more, unless explicitly defined otherwise.

The applicant notes that the vast majority of semi-hip replacement surgery is elderly patients, who have a high surgical risk, requiring a doctor to be able to quickly complete the surgery, and that the trial installation and removal times in semi-hip replacement surgery are directly related to the surgical time and risk.

However, at present, when using the bipolar head test mold, a doctor needs to disassemble the clamp ring and the test mold body, sleeve the clamp ring on the femoral neck test mold, then install the inner ball test mold on the femoral neck test mold, insert the inner ball test mold into the test mold body of the bipolar head test mold, then install the clamp ring on the test mold body by using a specific surgical forceps, after the reduction in operation is finished, the operator needs to take down the clamp ring from the test mold body by using a specific surgical forceps, then take out the test mold body, take out the inner ball test mold, take out the clamp ring, take out the medullary cavity file and the test neck, and install the real prosthesis. Aiming at the existing built-in snap ring test mould, doctors are different in the mounting steps of the double-end test mould using the double-end test mould and the double-end test mould with the external snap ring, the test mould is directly sleeved on the inner ball test mould, the snap ring test mould in the double-end test mould deforms and is spread under the action of pressure, the inner ball test mould is limited, the test mould is separated by a special taking-out tool after the reset is finished, and the inner ball test mould is separated from the double-end test mould. The two test molds can be assembled or disassembled by means of special tools, meanwhile, the visual field exposure is limited in the semi-hip replacement operation process, the operation difficulty of operators can be increased by corresponding tools, the operation time is prolonged, and the operation risk is increased.

In view of the foregoing, embodiments of the present application provide a bipolar head test mold that can be quickly assembled and disassembled without using a special tool.

Specifically, referring to fig. 1, fig. 2 and fig. 3, fig. 1 illustrates a three-dimensional structure of a bipolar head test mold provided in an embodiment of the present application; FIG. 2 illustrates a three-dimensional structure of a test body of the bipolar head test die; fig. 3 illustrates a front view structure of the bipolar head test mold. The bipolar head test mold comprises a test mold body 100 and a locking piece 200, wherein the test mold body 100 comprises a main body part 110 and a port part 120, the main body part 110 is connected with the port part 120 to enclose a containing cavity 130, one end of the port part 120 far away from the main body part 110 encloses an opening 140, and the containing cavity 130 is communicated with the opening 140.

The body portion 10 is the main component of the bipolar head test for simulating the fit of a real bipolar head to an acetabular socket, and the body portion 110 includes an outer spherical surface 111, which outer spherical surface 111 is for conforming to the acetabular socket in a surgical application.

The port portion 120 is connected to the body portion 110, the port portion 120 forms an opening 140 of the bipolar head mold, and the inner ball mold 300 can be mounted into the receiving cavity 130 through the opening 140 or detached from the receiving cavity 130. The locking member 200 is provided in the accommodating chamber 130, and the locking member 200 extends circumferentially along the inner surface of the port portion 120. When in operation application, the port part 120 can act like a clamping ring, can be used for limiting the inner ball test die 300 when the inner ball test die 300 is installed in the accommodating cavity 130, can also be used as a carrier of the locking piece 200, and can be matched with the locking piece 200 to limit and lock the inner ball test die 300, wherein the locking piece 200 is mainly used for applying a certain binding force to the inner ball test die 300 to prevent the inner ball test die 300 from being arbitrarily separated from the test die body 100 in the operation trial process, so that the stability of the inner ball test die 300 in use in the operation process is ensured.

The port portion 120 includes an outer slope 122 connected to the outer spherical surface 111, the outer slope 122 being drawn toward the inner surface of the port portion 120 in a direction away from the outer spherical surface 111. By providing the outer inclined surface 122, and along the direction far away from the outer spherical surface 111, the outer inclined surface 122 is drawn close to the inner surface of the port portion 120, so that the port portion 120 approximately presents a gradually thinning structure along the direction far away from the main body portion 110, and the material near the opening 140 is thinner and is easier to be extruded outwards to develop elastic deformation, so that the installation and the disassembly of the inner ball test die 300 can be realized without using a special tool, and the disassembly efficiency of the inner ball test die 300 can be improved.

In some embodiments, the test body 100 is of an integral structure, that is, the main body 110 and the port 120 are integrally formed during processing and manufacturing, so that the difficulty of processing and manufacturing is reduced, and the structural stability of the test body 100 is ensured.

Referring to fig. 4, fig. 4 illustrates a cross-sectional structure of the bipolar head test mold in fig. 1, in some embodiments, the thickness H of the port portion 120 is smaller than the thickness H of the main body portion 110, and by setting the thickness H of the port portion 120 smaller than the thickness H of the main body portion 110, the whole test mold body 100 is thinner in a region near the opening 140, which is made of less material and is more prone to elastic deformation, so that the resistance of the inner ball test mold 300 in entering or exiting the test mold body 100 can be further reduced, the difficulty of installation and disassembly is reduced, and the operation efficiency is improved.

The body portion 110 includes an inner spherical surface 112, the inner spherical surface 112 and the outer spherical surface 111 being disposed away from one another, it being understood that in surgical applications, the inner spherical surface 112 is configured to mate with the inner sphere test pattern 300 such that the diameter D of the inner spherical surface 112 is equal to the diameter of the inner sphere test pattern 300. And, the diameter D of the inner spherical surface 112 is larger than the inner diameter D of the locking member 200, so that the locking member 200 can limit and lock the inner ball test mold 300 loaded in the receiving chamber 130.

It should be noted that, in the embodiment of the present application, the locking member 200 is an elastic locking member 200, which can be elastically deformed when the inner ball test mold 300 is assembled or disassembled, and then be restored to the original shape under its own elasticity after being spread by the inner ball test mold 300.

In some embodiments, the inner surface of the port portion 120 includes a bearing surface 121, the bearing surface 121 being located on a side of the lock 200 remote from the inner spherical surface 112. During operation, the inner ball test mold 300 can be propped against the propping surface 121 in the process of loading the inner ball test mold 300, the propping surface 121 is propped outwards in the inserting process, and the locking piece 200 is driven to generate deformation in advance, so that the loading process is smoother, and the mounting difficulty is further reduced.

Specifically, as shown in fig. 4, the accommodating cavity 130 has a central axis AA ', the central axis AA' passes through the center of the inner spherical surface 112, and the minimum distance L between the propping surface 121 and the central axis satisfies: d > 2L > D; where D is the diameter of the inner sphere 112 and D is the inner diameter of the locking member 200. In some embodiments, the abutment surface 121 is substantially cylindrical in shape, and thus 2L may be considered as its diameter. Since the diameter D of the inner sphere 112 is identical to the diameter D of the inner sphere test mold 300, the inner sphere test mold 300 will contact the supporting surface 121 first when the inner sphere test mold 300 is inserted, thereby producing the above-mentioned effects and reducing the difficulty of loading.

Referring again to fig. 1-4, in some embodiments, the trial body 100 is provided with a slot 150, the slot 150 extending through the inner and outer surfaces of the trial body 100, and the slot 150 extending from the end of the port portion 120 remote from the body portion 110 toward the body portion 110. By providing the notch 150 in the test body 100, the material in the area near the opening 140 is further reduced, and the elasticity of the area is increased, thereby further reducing the difficulty of installing and removing the inner ball test mold 300.

In some embodiments, the plurality of notches 150 are provided, and the plurality of notches 150 are arranged at intervals along the circumference of the trial body 100. By providing the plurality of notches 150 in the circumferential direction of the test die body 100, the elasticity of the port portion 120 is further increased, so that elastic deformation is more easily generated, and the difficulty of installation and disassembly is increased. And in the implementation, through setting up notch 150 symmetry, the extrusion force that receives when making interior ball test die 300 load into and dismantle is more even, further promotes dismouting efficiency and operator's use impression.

Referring again to fig. 1 and 2, in some embodiments, the port portion 120 is provided with a receiving groove 160, the receiving groove 160 extending circumferentially along the inner surface of the port portion 120, and the locking member 200 is embedded within the receiving groove 160. Thereby improving the installation firmness of the locking piece 200 and facilitating the disassembly, assembly and maintenance of the locking piece 200.

Specifically, the locking member 200 is a spring or an O-ring rubber, and can lock the inner ball test mold 300 by binding the elastic force of the locking member.

Accordingly, referring to fig. 5, fig. 5 illustrates an assembled state of the inner ball test mold 300 and the bipolar head test mold, wherein the inner ball test mold 300 may be locked in the receiving cavity 130 by the locking member 200.

In some embodiments, a limit groove may be further provided on the inner ball test mold 300, and the inner ball test mold 300 may be restricted from being removed from the receiving chamber 130 by inserting the locking member 200 into the limit groove.

Referring to fig. 6, fig. 6 illustrates an intermediate state of assembling the inner ball test mold 300 and the bipolar head test mold, in some embodiments, during the process of loading the inner ball test mold 300 into the accommodating cavity 130, the inner ball test mold 300 is first abutted against the abutment surface 121 to push the port portion 120 outwards, the port portion 120 is relatively easy to elastically deform due to the thinned design of the port portion 120, and meanwhile, the locking member 200 is driven to elastically deform to a certain extent, so that the inner ball test mold 300 moves more smoothly, and as the inner ball test mold 300 moves into the accommodating cavity 130, the inner ball test mold is contacted with the locking member 200 to further support the locking member 200, and then completely enters the accommodating cavity 130, and the shape of the locking member 200 is restored to bind the inner ball test mold 300. Meanwhile, due to the thinned design of the port portion 120, the inner ball test mold 300 can be easily removed from the accommodating cavity 130, so that the operation process can be accelerated, and the operation efficiency and safety can be improved.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

The bipolar head test mold provided by the embodiment of the application is described in detail above, and specific examples are applied to illustrate the principle and the implementation of the application, and the description of the above embodiment is only used for helping to understand the technical scheme and the core idea of the application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A bipolar head test die, comprising:

the test die comprises a test die body, wherein the test die body comprises a main body part and a port part, the main body part is connected with the port part to enclose a containing cavity, one end of the port part, which is far away from the main body part, encloses an opening, and the containing cavity is communicated with the opening; the main body part comprises an outer spherical surface, the port part comprises an outer inclined surface connected with the outer spherical surface, and the outer inclined surface is close to the inner surface of the port part along the direction away from the outer spherical surface;

and the locking piece is arranged in the accommodating cavity and extends along the circumferential direction of the inner surface of the port part.

2. The bipolar head test mold of claim 1, wherein the thickness of the port portion is less than the thickness of the body portion.

3. The bipolar head mold of claim 1, wherein the body portion comprises an inner spherical surface having a diameter greater than an inner diameter of the locking member.

4. A bipolar head phantom according to claim 3, wherein the inner surface of the port portion comprises a abutment surface, said abutment surface being located on a side of the locking member remote from the inner sphere.

5. The bipolar head mold according to claim 4, wherein the receiving cavity has a central axis passing through a center of the inner spherical surface, and a minimum distance L between the propping surface and the central axis satisfies: d > 2L > D;

wherein D is the diameter of the inner sphere, and D is the inner diameter of the locking piece.

6. The bipolar head mold according to claim 1, wherein the mold body is provided with a notch extending through an inner surface and an outer surface of the mold body, and the notch extends from an end of the port portion remote from the main body portion toward the main body portion.

7. The bipolar head test die of claim 6, wherein a plurality of said notches are provided, a plurality of said notches being spaced apart along a circumference of said test die body.

8. The bipolar head test mold of claim 1, wherein the port portion is provided with a receiving groove extending circumferentially along an inner surface of the port portion, the locking member being embedded in the receiving groove.

9. The bipolar head mold according to claim 1, wherein the locking member is an elastic locking member; and/or the number of the groups of groups,

the locking piece is a spring or an O-shaped rubber ring.

10. The bipolar head test mold of claim 1, wherein the test mold body is of unitary construction.

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