CN216136113U - Prosthetic device for joint tissue and prosthetic system - Google Patents

Abstract

The utility model relates to a repair device for articular tissues, comprising a buffer portion, which can be in an atrophied state or in an expanded state, wherein the buffer portion comprises a cavity and an injection opening portion communicated with the cavity, and the cavity is configured to be filled with filling substances so as to enable the buffer portion to be in the expanded state; the prosthetic device further comprises at least one semi-permeable membrane enclosed in the injection port for allowing the passage of the filling substance to fill the cavity; the injection inlet part also comprises a sealed space which is positioned outside the semi-permeable membrane and is filled with sealing substances, and the semi-permeable membrane blocks the sealing substances from passing through so that the sealing substances are filled in the sealed space to seal the injection inlet part. Above-mentioned prosthetic devices and conveyor, normal saline can permeate the semi-permeable membrane, and the cavity that enters into prosthetic devices through injection mouth portion is sufficient, makes prosthetic devices be the inflation state, and liquid bone cement can't permeate the semi-permeable membrane, treats that bone cement solidifies to become solid-state back, can form sealedly to injection mouth portion.

Description

Prosthetic device for joint tissue and prosthetic system

Technical Field

The present invention relates to the field of medical device technology, and in particular to a prosthetic device and a prosthetic system for joint tissue.

Background

The rotator cuff is a muscle-tendon structure connecting the scapula and the humeral head, and is located on the outer layer of the shoulder joint capsule and the inner layer of the deltoid. The rotator cuff consists of a front rotator cuff (subscapularis), an upper rotator cuff (supraspinatus and subscapularis) and a rear rotator cuff (subscapularis and teres minor), and the rotator cuff has certain functions of inward rotation, outward rotation and outward expansion of the upper arm, and has the main functions of stabilizing the position of the humeral head on the glenoid during movement, maintaining the arm of force of muscles, and avoiding pain caused by the humeral head moving upwards and impacting the acromion. Therefore, the rotator cuff plays an extremely important role in maintaining the stability of the shoulder joint and in moving the shoulder joint.

However, with age, repeated shoulder joint movement for a long time, hyperosteogeny under the shoulder or repeated violent movement may cause abrasion and tearing of soft tissues under the shoulder (joint bursa and rotator cuff), so that the stability and mobility of the humeral head are damaged, the arm of the patient cannot be abducted or lifted during the shoulder joint movement, severe pain is caused by impact between the sclerotin or the sclerotin and the rotator cuff, and the patient cannot sleep at night due to pain, thereby seriously affecting the quality of life and the self-care ability.

At present, the pain caused by rotator cuff injury can be treated by implanting a prosthesis (such as a rotator cuff) which can be implanted between the acromion and the humeral head to maintain and increase the distance between the acromion and the humeral head and play a role of a 'lever' between the humeral head and the fracture surface of the tendon, thereby preventing the injured rotator cuff from colliding with the bony structure of the acromion, increasing the stability of the glenohumeral joint and reducing the downward pressure of the acromion, thereby relieving the pain, reducing the upward movement of the humeral head, increasing the shoulder-humeral distance, increasing the abduction force arm of the shoulder joint and rapidly improving the mobility of the shoulder joint.

After the existing prosthesis is implanted into a shoulder joint, filling materials such as physiological saline are required to be filled into a cavity to enable the prosthesis to be in an expansion state, and the expansion of the prosthesis is used for supporting tissues in the shoulder joint to achieve the treatment purpose, so that good sealing is guaranteed to be formed after the prosthesis is filled to maintain the expansion state of the prosthesis. However, as shown in fig. 1 and 2, the conventional prosthesis generally uses a sealing plug to seal the injection port of the prosthesis, and the sealing plug on the prosthesis is easily forced to fall off with the movement of the shoulder joint, so that the leakage risk is caused due to the poor sealing.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a prosthetic device for joint tissue and a prosthesis system for solving the problem that the prosthesis leaks due to poor sealing in the joint tissue.

The present invention provides a prosthetic device for joint tissue, comprising:

a cushioning portion capable of assuming an atrophied state or an inflated state, the cushioning portion comprising a cavity and an injection port portion communicating with the cavity, the cavity being configured for filling with an inflating substance to bring the cushioning portion into the inflated state;

at least one semi-permeable membrane enclosed in said injection port portion allowing passage of said filling substance to fill said cavity; the injection inlet part also comprises a sealing space which is positioned outside the semi-permeable membrane and is filled with a sealing substance, and the semi-permeable membrane blocks the sealing substance to pass through so that the sealing substance is filled in the sealing space to seal the injection inlet part.

In one embodiment, the semi-permeable membrane has a pore size between 0.1nm and 1 nm.

In one embodiment, the semi-permeable membrane has a pore size of 0.4 nm.

In one embodiment, the filling substance is normal saline; and/or the sealing substance is bone cement or an adhesive.

In one embodiment, the repair device further comprises:

an isolation substance removably covering the injection port and located between the semi-permeable membrane and the sealed space.

In one embodiment, the depth of the injection inlet part is larger than the thickness of the semi-permeable membrane, the semi-permeable membrane is positioned in the injection inlet part, and at least a part of the space in the injection inlet part except for the semi-permeable membrane forms the sealed space.

In one embodiment, the repair device further comprises:

an injection pipe communicating with the injection port portion; the semi-permeable membrane is located within the injection port and/or within the inner lumen of the injection conduit.

In one embodiment, the sealed space is formed in the inner lumen of the infusion conduit.

In one embodiment, at least a portion of the injection conduit is made of an elastic material.

In one embodiment, the inner lumen of the injection conduit is provided with a detent structure.

In one embodiment, the detent structure is a protrusion formed on the inner pipe wall of the injection pipe; or, the retaining structure is a recess formed in the inner pipe wall of the injection pipeline; alternatively, the detent structure is a combination of protrusions and recesses formed in the inner pipe wall of the injection pipe.

The utility model also provides a prosthesis system comprising:

the repair device;

and the conveying device is connected with the repairing device and is used for conveying the repairing device.

Above-mentioned prosthetic devices and conveyor, prosthetic devices of shrink can utilize conveyor to implant articular tissue's preset position, and after prosthetic devices reached suitable position, recycle pipeline and pour into prosthetic devices's cavity with the sufficient material of normal saline class into, normal saline can permeate the semi-permeable membrane, consequently can enter into prosthetic devices ' cavity through the injection mouth portion and carry out filling, makes prosthetic devices convert the inflation state into. After the filling material is sufficient, the conveying pipeline is continuously utilized to inject sealing materials such as bone cement into the repairing device, the bone cement is injected through the conveying guide pipe when the bone cement is in a liquid form, the liquid bone cement cannot penetrate through the semi-permeable membrane, so that the liquid bone cement is blocked at the injection opening part by the semi-permeable membrane and cannot enter the cavity of the repairing device, and after the bone cement is solidified and changed into a solid state, the sealing can be formed on the injection opening part.

Drawings

Fig. 1 is a schematic view of a sealing structure of a buffer portion in the related art;

fig. 2 is a schematic view showing a sealing failure of a buffer portion in the related art.

FIG. 3 is a schematic structural diagram of a buffer portion 1 according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a buffer portion according to an embodiment of the present invention, shown in FIG. 2;

FIG. 5 is a schematic structural diagram of a buffer portion in an embodiment of the utility model 3;

FIG. 6 is a schematic structural diagram of a buffer portion 1 according to another embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a buffer portion according to another embodiment of the present invention, shown in FIG. 2;

FIG. 8 is a schematic view illustrating a usage state of a buffer portion according to an embodiment of the present invention 1;

FIG. 9 is a schematic view illustrating a usage state of a buffer portion according to an embodiment of the utility model;

FIG. 10 is a schematic view illustrating an unsealed state of the buffering portion according to an embodiment of the present invention;

FIG. 11 is a schematic view illustrating a sealing state of a buffer portion in an embodiment of the present invention 1;

FIG. 12 is a schematic view illustrating a sealing state of the buffer portion according to an embodiment of the present invention;

FIG. 13 is a schematic view illustrating an unsealed state of the buffering part according to another embodiment of the present invention;

fig. 14 is a schematic view illustrating a sealing state of the buffer portion according to another embodiment of the present invention.

Reference numerals:

100. a buffer section; 200. a semi-permeable membrane;

300. a spacer material; 400. a sealing substance;

110. a cavity; 120. an inlet injection part;

130. an injection pipe; 140. sealing the space;

410. the screens structure.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

To more clearly describe the structure of the delivery device, the term "distal" is defined herein to mean the end of the device that is distal from the operator during a surgical procedure, and the term "proximal" is defined to mean the end of the device that is proximal to the operator during a surgical procedure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Similar to prostheses implanted in shoulder joints, similar disease problems also exist in human joints such as knee joints, which require treatment by similar prosthetic implantation means. After the similar prosthesis is implanted into each human joint, the sealing state is required to be kept, and the problem of leakage caused by poor sealing can not occur, so that the prosthesis provided by the utility model is not only suitable for shoulder joints, but also suitable for manufacturing the prosthesis suitable for other joints of the human body, and the similar problems encountered when the prosthesis is implanted into the human joint are solved.

Referring to figures 1 and 2, the prosthesis is provided with a cavity which is inflated by filling the cavity with a corresponding filling substance to form an expanded condition after implantation of the prosthesis in a human joint, the inflated prosthesis being sealed by inserting a sealing plug into the injection port. However, joint tissues are not free from moving in the recovery process, so that normal movement of a human body is ensured, acting force is formed on the inflated prosthesis when the joints of the human body move, the acting force always applied to the prosthesis is still from all directions and changeable in magnitude, the uncertain acting force easily enables the sealing plug to receive uncertain acting force, and then the sealing plug falls off from the injection opening, so that the cavity of the prosthesis is in a sealing state, the inflated substances are leaked out, the inflation state cannot be kept, the mechanical lever effect is lost, and the prosthesis is disabled.

In order to solve the problem that the sealing plug is easy to fall off to cause the failure of the prosthesis in the prior art, the utility model provides the following technical scheme.

Referring to fig. 3, an embodiment of the present invention provides a prosthetic device for joint tissue, including a cushioning portion 100 and at least one semi-permeable membrane 200, the cushioning portion 100 being capable of assuming an collapsed state or an expanded state, the cushioning portion 100 including a cavity 110 and an injection inlet portion 120 communicating with the cavity 110, the cavity 110 being configured to be filled with an inflation substance to allow the cushioning portion 100 to assume the expanded state; a semi-permeable membrane 200 is enclosed in the injection port 120, allowing the passage of the filling substance to fill the cavity 110; the injection inlet part 120 further includes a sealing space 140 located outside the semi-permeable membrane 200 and filled with a sealing substance 400, and the semi-permeable membrane 200 blocks the sealing substance 400 from passing through such that the sealing substance 400 is filled in the sealing space 140 to seal the injection inlet part 120.

After the semi-permeable membrane 200 is sealed in the injection inlet 120, the two sides of the semi-permeable membrane 200 are respectively the inner side and the outer side, the inner side of the semi-permeable membrane 200 is the side facing the cavity 110 of the buffer part 100, and the outer side of the semi-permeable membrane 200 is the side facing the outside of the buffer part 100, i.e. the position of the sealed space 140 relative to the semi-permeable membrane 200.

The shrinking state of the buffer part 100 indicates that the buffer part 100 can shrink its volume, the shrinking degree mainly depends on the transportation requirement, it is ensured that the volume of the buffer part 100 is shrunk to be capable of being accommodated in the transportation device and being transported to the predetermined position smoothly, the shrinking shape of the buffer part 100 in the shrinking state is not limited as long as the transportation requirement is met, for example, when the transportation device transports the buffer part 100 by using the transportation catheter, the shrinking state of the buffer part 100 needs to be matched with the tubular inner lumen of the transportation catheter, and the buffer part is accommodated in the transportation catheter in a long strip shape.

Accordingly, the expansion state is relative to the atrophy state, the expansion state of the cushioning portion 100 means that the cushioning portion 100 can expand its own volume, the expansion degree mainly depends on the repair requirement of the shoulder joint, the volume of the cushioning portion 100 is ensured to be expanded to form an effective support between the shoulder peak and the humeral head, so as to maintain and increase the distance between the shoulder peak and the humeral head, and achieve the therapeutic effect, the expansion shape of the cushioning portion 100 in the expansion state is not limited as long as the effective support between the shoulder peak and the humeral head is formed, for example, the cushioning portion 100 in the expansion state is substantially plate-shaped, or the two side surfaces of the plate-shaped has the surface shape of the tissue structure in the shoulder joint, such as a curved surface, a concave-convex isothermal flexible joint tendon, a humeral head, a shoulder peak, and the like.

The buffer part 100 may have a protective layer, the protective layer is disposed on the surface of the buffer part 100, and the protective layer may be a sleeve body sleeved outside the buffer part 100 or a layer structure formed by spraying. The repair device adopts a single physical blocking form of the injection opening part 120 different from the existing sealing plug, and in turn provides a way of distinguishing whether different substances are allowed to pass through the injection opening part 120, and by utilizing the different properties of the different substances, the filling substances are allowed to pass through the injection opening part 120 and reach the cavity 110 to fill the cavity 110, and the sealing substances 400 are not allowed to pass through the injection opening part 120 and are blocked at the injection opening part 120 to fill and seal the injection opening part 120. The sealing material 400 is selected from a material capable of converting between a liquid state and a solid state, such as bone cement, an adhesive and the like, and compared with a physical blocking form of the sealing plug, when the liquid sealing material 400 is converted into the solid sealing material 400 at the injection opening part 120, the liquid sealing material 400 can form a tighter adhesion with the injection opening part 120, and even can form an adhesion state close to an integral forming state, so that compared with the physical blocking formed by friction force, the sealing effect can be greatly improved.

In order to achieve the above-mentioned aspects, the present invention provides a structure in which a semi-permeable membrane 200 is provided on a buffer part 100, the semi-permeable membrane 200 is a semi-permeable membrane that allows one or more substances in a solution to permeate therethrough and retains other substances, the semi-permeable membrane 200 is used to distinguish the different substances mentioned above, and the semi-permeable membrane 200 is sealed in an injection inlet part 120, which is understood as a sealing cover formed between the semi-permeable membrane 200 and the injection inlet part 120, such that a filling substance cannot enter a cavity 110 of the buffer part 100 except for the semi-permeable membrane 200, and only the semi-permeable membrane 200 can enter the cavity 110 of the buffer part 100, and the sealing substance 400 cannot permeate the semi-permeable membrane 200 itself and thus cannot enter the cavity 110 of the buffer part 100, and the injection inlet part 200 does not seal and cover the injection inlet part 120, and cannot pass any substance, since the semi-permeable membrane 200 itself has a function of permeating a specific substance.

Referring to fig. 3 and 4, the semi-permeable membrane 200 is enclosed in the injection inlet 120, and not only does the semi-permeable membrane 200 necessarily lie in the injection inlet 120, but the semi-permeable membrane 200 can lie in the cavity 110 of the buffer part 100 and close to and cover the injection inlet 120, or the semi-permeable membrane 200 lies in the injection inlet 120, and can achieve the sealing cover of the injection inlet 120. Here, the position of the semipermeable membrane 200 may be specifically set according to the coupling and engagement structure between the buffer part 100 and the delivery device, and in the case of a delivery device having a delivery conduit for connecting the injection inlet part 120, delivering the buffer part 100, injecting the filling material into the cavity 110 of the buffer part 100 through the injection inlet part 120, and applying the sealing material 400 to the injection inlet part 120. If the distal end of the delivery catheter is inserted into the injection inlet part 120, the semi-permeable membrane 200 can be arranged in the cavity 110 of the buffer part 100 to hermetically cover the injection inlet part 120, so that a space for inserting the distal end of the delivery catheter is reserved in the injection inlet part 120, or the injection inlet part 120 has a certain thickness, so that the distal end of the delivery catheter can be inserted and the semi-permeable membrane 200 can be fixed in the injection inlet part 120. The semipermeable membrane 200 can be disposed at different suitable positions for different connection structures formed by the delivery conduit and the injection inlet 120, which is not limited.

The semipermeable membrane 200, through its semi-permeable action, may allow only small particles of the encapsulating material to pass through and block larger particles of the sealing material 400 from passing through, based on the particle size of the encapsulating material and the sealing material 400, thereby distinguishing the encapsulating material from the sealing material 400. Therefore, the semi-permeable membrane 200 itself has a function of screening different substances, but the separation of different substances is determined based on the particle sizes of the different substances, so that the pore diameter of the semi-permeable membrane 200 is not fixed but can be varied within a certain range, and the range in which the variation can be adjusted depending on the filling material and the different material used for the sealing material 400. In one embodiment, the filling material is physiological saline, the sealing material 400 is bone cement (the bone cement is a flowable enhancing material, usually Polymethylmethacrylate, PMA) or an adhesive, the pore size of the semi-permeable membrane 200 can be controlled between 0.1nm and 1nm, for example, the pore size of the semi-permeable membrane 200 is 0.1nm, 0.15nm, 0.2nm, 0.25nm, 0.3nm, 0.35nm, 0.4nm, 0.45nm, 0.5nm, 0.55nm, 0.6nm, 0.65nm, 0.7nm, 0.75nm, 0.8nm, 0.85nm, 0.9nm, 0.95nm, 1nm, etc., which can be set by those skilled in the art according to the needs.

Therefore, the contracted cushioning portion 100 can be implanted into a predetermined position of a joint of a human body by using the delivery tube of the delivery device, and after the cushioning portion 100 reaches a proper position, an inflating substance such as saline is injected into the cavity 110 of the cushioning portion 100 by using the delivery tube, and the saline can penetrate through the semi-permeable membrane 200, and thus can enter the cavity 110 of the cushioning portion 100 through the injection inlet portion 120 to inflate the same, so that the cushioning portion 100 is converted into an inflated state. After the filling material is sufficiently filled, the sealing material 400 such as bone cement is continuously injected into the buffer portion 100 through the delivery tube, and when the bone cement is in a liquid form, the bone cement in the liquid form cannot penetrate through the semi-permeable membrane 200, and therefore, the bone cement is blocked by the semi-permeable membrane 200 at the injection port 120 and cannot enter the cavity 110 of the buffer portion 100, and the injection port 120 can be sealed after the bone cement is solidified to become a solid.

Referring to fig. 5, the prosthetic device further includes a barrier material 300, the barrier material 300 being removably sealed to the injection port 120 and positioned between the semi-permeable membrane 200 and the sealed space 140. The isolating material 300 is used for isolating the sealing material 400, and further isolates the sealing material 400 on the basis that the semi-permeable membrane 200 blocks the sealing material 400 from entering the cavity 110 of the buffer portion 100, so as to ensure that the sealing material 400 is blocked outside and cannot enter the cavity 110 of the buffer portion 100. The material of the separator substance 300 may be a substance having a semi-permeable function similar to that of the semi-permeable membrane 200, but in this case, the separator substance 300 has a permeable function equivalent to or weaker than that of the semi-permeable membrane 200, for example, a membrane structure having pores equivalent to or smaller than those of the semi-permeable membrane 200 is used. Or, the isolating material 300 may also be a material completely without a permeation function, so as to achieve a complete isolation effect, for example, the isolating material 300 is a paraffin-based material, and the like, as long as controllable conversion between a liquid state and a solid state can be achieved, at this time, the isolating material 300 may not be provided, and the filling material is filled into the cavity 110 of the buffer portion 100, and after the filling material is filled, the isolating material 300 is provided at the injection port 120 to form a seal, so as to block the subsequently filled sealing material 400.

The semi-permeable membrane 200 and the sealed space 140 may be formed in various structures, for example, as shown in fig. 3 to 5, the depth of the injection inlet part 120 is greater than the thickness of the semi-permeable membrane 200, the semi-permeable membrane 200 is positioned in the injection inlet part 120, and at least a part of the space of the injection inlet part 120 except for the semi-permeable membrane 200 is used to form the sealed space 140. The depth of the inlet portion 120 indicates the thickness of the buffer portion 100 at the position of the inlet portion 120, and does not include the area in the space 110 of the buffer portion 100, and the thickness of the buffer portion 100 at the position of the inlet portion 120 may be the same as or different from the thickness at other positions, so that the actual thickness of the inlet portion 120 and thus the depth of the inlet portion 120 can be independently adjusted. The sealing space 140 may occupy all or part of the space in the injection inlet part 120 except for the semi-permeable membrane 200, depending on the thickness to be filled with the sealing material. In other embodiments, the depth of the injection port 120 may be the length of the neck portion extending into the buffer cavity 110. The semi-permeable membrane 200 is disposed at one end of the neck portion near the buffer chamber 110, and the sealing space 140 is formed in the injection inlet 120 except for the semi-permeable membrane 200. Thus, the filling substance can enter the cavity 110 of the cushioning portion 100 through the semi-permeable membrane 200, and the sealing substance 400 is blocked in the injection inlet portion 120, sealing the injection inlet portion 120 at a position close to the outer side of the semi-permeable membrane 200.

In addition, referring to fig. 6 to 9, the prosthetic device further includes an injection pipe 130, and the injection pipe 130 communicates with the injection inlet part 120; the semi-permeable membrane 200 is located in the injection inlet part 120, at least a part of the inner lumen of the injection pipe 130 is used to form the sealed space 140, or the semi-permeable membrane 200 is located in the inner lumen of the injection pipe 130, at least a part of the inner lumen of the injection pipe 130 except for the semi-permeable membrane 200 is used to form the sealed space 140, or the semi-permeable membrane 200 is simultaneously located in the injection inlet part 120 and the inner lumen of the injection pipe 130 based on its larger thickness or multi-layer structure, i.e. simultaneously occupies the space of the injection inlet part 120 and the injection pipe 130, at this time, at least a part of the inner lumen of the injection pipe 130 except for the semi-permeable membrane 200 is used to form the sealed space 140.

The sealed space 140 may occupy all or part of the inner lumen of the injection tube 130 except for the semi-permeable membrane 200, depending on the thickness to be filled with the sealing material. The injection pipe 130 is of a tubular-like structure having a pipe lumen communicating with the injection port part 120. The injection pipe 130 may be integrally formed with the inlet 120, for example, the injection pipe 130 may be formed by extending a peripheral structure of the inlet 120 outward to form a tubular structure, extending the peripheral structure inward to form a tubular structure, and extending the peripheral structure inward and outward to form a tubular structure, in which case the material of the injection pipe 130 is the same as that of the inlet 120, and the injection pipe 130 has a more stable integral structure. Alternatively, the injection pipe 130 may be a separate member from the injection inlet 120, and the injection pipe 130 may be connected to the injection inlet 120 by a suitable connection method, in this case, the connection method of the injection pipe 130 may be bonding or welding, and the material of the injection pipe 130 may be the same as that of the injection inlet 120, or may be different from that of the injection inlet 120 as required.

In other embodiments, the semi-permeable membrane 200 may be disposed at the injection inlet 120, the sealing space 140 may be formed in the injection pipe 130, the sealing space 130 may be filled with the sealing material 400, the sealing material 400 may be blocked outside the semi-permeable membrane 200 when not solidified, and a complete sealing effect may be achieved after the sealing material 400 is solidified.

The provision of the injection pipe 130 not only provides a larger installation space for the semi-permeable membrane 200 and the barrier material 300, but also facilitates the connection of the delivery conduit of the delivery device with the injection inlet 120. For example, the semipermeable membrane 200 may be directly provided in the injection pipe 130, the spacer 300 may be provided in the injection pipe 130, the injection port part 120 may be sealed by the semipermeable membrane 200 positioned in the injection pipe 130 by the sealing communication between the injection pipe 130 and the injection port part 120, and the injection port part 120 may be sealed by the spacer 300. Even though the semi-permeable membrane 200 and the spacer 300 are both disposed in the injection pipe 130, the injection pipe 130 has a pipe lumen of a certain length, and thus has a sufficient space to allow the delivery catheter of the delivery device to be inserted into the injection pipe 130, and the delivery pipe may be inserted into the injection pipe 130 or inserted outside the injection pipe 130.

As for the sealing material 400, the sealing material 400 has a characteristic of being converted between a liquid state and a solid state, for example, bone cement may be injected through the delivery tube when the bone cement is in a liquid state, such that the bone cement is blocked and stays in the injection pipe 130, and then, after the bone cement is solidified to become a solid state, a seal may be formed on the injection port 120. In the process of transforming the bone cement from the liquid state to the solid state, the liquid bone cement may shrink to some extent after being solidified into the solid bone cement, and thus, when the solid bone cement shrinks, the solid bone cement may be separated from the inner wall of the pipe of the injection pipe 130 to some extent, resulting in a decrease in sealing effect. Therefore, the injection pipe 130 may be limited in material, so that at least a portion of the injection pipe 130 is made of an elastic material, and the elastic material may be thermoplastic polyurethane elastomer rubber or polyurethane. Referring to fig. 10 to 12, after at least a portion of the injection tube 130 is made of an elastic material, when liquid bone cement is injected into the injection tube 130, the elastic material of the injection tube 130 is partially supported, and when the injection tube 130 is made of an elastic material, most of the region of the injection tube 130 is supported. When the bone cement is solidified into a solid state, even if the bone cement may shrink, since the injection pipe 130 has an elastic material portion, it may be rebounded along with the shrinkage of the bone cement, and it is still possible to maintain the close adhesion of the solid bone cement and the injection pipe 130, thereby preventing leakage.

Referring to fig. 13 and 14, the inner lumen of the injection conduit 130 is provided with a blocking structure 410, the blocking structure 410 is used for limiting solid bone cement, when liquid bone cement enters the inner lumen of the injection conduit 130, the liquid bone cement forms mutual filling along with the specific structural form of the blocking structure 410, and the filling state is maintained until the bone cement is solidified, the solid bone cement forms a solid structure mutually clamped or engaged with the blocking structure 410, so that the solid bone cement is limited and prevented from falling off. As for the blocking structure 410, it can be a protrusion formed on the inner wall of the injection pipe 130, or a recess formed on the inner wall of the injection pipe 130, or a combination of the protrusion and the recess formed on the inner wall of the injection pipe 130, as long as the blocking structure 410 forms a structure capable of engaging and limiting with the solidified cement, and the specific structure is not limited.

The utility model also provides a prosthesis system which comprises the repairing device and a conveying device, wherein the conveying device is connected with the repairing device and used for conveying the repairing device. The conveying device is used for smoothly conveying the repairing device into tissues of human joints, so that the repairing device can be implanted, for example, for a shoulder joint, the repairing device can be smoothly implanted into the tissues of the shoulder joint, and for a knee joint, the repairing device can be smoothly implanted into the tissues of the knee joint. The conveying device may adopt an existing device structure, and is not limited herein.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (12)

1. A prosthetic device for joint tissue, comprising:

a cushioning portion capable of assuming an atrophied state or an inflated state, the cushioning portion comprising a cavity and an injection port portion communicating with the cavity, the cavity being configured for filling with an inflating substance to bring the cushioning portion into the inflated state;

at least one semi-permeable membrane enclosed in said injection port portion allowing passage of said filling substance to fill said cavity; the injection inlet part also comprises a sealing space which is positioned outside the semi-permeable membrane and is filled with a sealing substance, and the semi-permeable membrane blocks the sealing substance to pass through so that the sealing substance is filled in the sealing space to seal the injection inlet part.

2. The prosthetic device of claim 1, wherein the semi-permeable membrane has a pore size between 0.1nm and 1 nm.

3. The prosthetic device of claim 2, wherein the semi-permeable membrane has a pore size of 0.4 nm.

4. The prosthetic device of claim 1 wherein the filling substance is normal saline; and/or the sealing substance is bone cement or an adhesive.

5. The prosthetic device of claim 1, further comprising:

an isolation substance removably covering the injection port and located between the semi-permeable membrane and the sealed space.

6. The prosthetic device according to any one of claims 1 to 5, wherein the depth of the injection inlet part is larger than the thickness of the semi-permeable membrane, the semi-permeable membrane being located at the injection inlet part, at least a part of the space in the injection inlet part other than the space where the semi-permeable membrane is provided forming the sealed space.

7. The prosthetic device of any one of claims 1-5, further comprising:

an injection pipe communicating with the injection port portion; the semi-permeable membrane is located within the injection port and/or within the inner lumen of the injection conduit.

8. The prosthetic device of claim 7, wherein the sealed space is formed in an inner lumen of the infusion conduit.

9. The prosthetic device of claim 8, wherein at least a portion of the injection conduit is formed of an elastomeric material.

10. The prosthetic device of claim 8, wherein the inner lumen of the injection conduit is provided with a detent structure.

11. The prosthetic device of claim 10, wherein the detent structure is a protrusion formed on an inner pipe wall of the injection conduit; or, the retaining structure is a recess formed in the inner pipe wall of the injection pipeline; alternatively, the detent structure is a combination of protrusions and recesses formed in the inner pipe wall of the injection pipe.

12. A prosthesis system, comprising:

the prosthetic device of any one of claims 1-11;

and the conveying device is connected with the repairing device and is used for conveying the repairing device.

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