TW201637621A - Device for applying fixing agent of artificial implant - Google Patents

Abstract

A device for applying fixing agent of artificial implant comprises an injection cavity which is longitudinally arranged from the outer edge of the artificial implant toward the interior, a plurality of extrusion orifices which are respectively arranged by penetrating the outer edge of the artificial implant toward the direction of the injection cavity and communicated with the injection cavity, and an injection valve which comprises a valve stem for penetrating through the injection channel. The valve stem is made to match well with and slide in the injection cavity, so that the fixing agent can be injected along the injection channel into the injection space formed between the outlet at the end of the injection channel and the injection cavity, and then extruded outwardly through each extrusion orifice exposed to the injection space.

Description

Artificial implant fixing agent application device

The present invention relates to a fixative application device for artificial implants, and more particularly to a device for controlling the application position of a fixative by an injection valve which is slid into an artificial implant.

Because human bones, such as hip joints, may be caused by congenital hip joint dysplasia, degeneration, lesions or external forces, etc., resulting in deformation of the femoral head, acetabular wear and other conditions, so that the patient's legs are sore and bad. Troubled. Most of the current solutions are artificial hip joint replacement, so that patients do not have to suffer from discomfort caused by hip joint disease. The artificial hip joint replacement is performed by implanting a longitudinal artificial implant (for example, a femoral stem) into the medullary cavity of the patient's femur, and then connecting the top of the artificial implant with the acetabulum. The femoral head completes the replacement surgery.

The artificial implants currently used in medical treatment are integrally formed of a metal material and are tapered downward for implantation into the medullary cavity of the patient's femur, in order to enable the implanted artificial implant to be fastened to the patient. In the medullary cavity, the implant is usually inserted into the entrance of the patient's medullary cavity, and then the artificial implant is inserted. When the artificial implant is inserted, the fixative is inserted into the patient's pulp around the artificial implant. Inside the cavity, it is hardened to achieve a fixed purpose.

However, in the above-mentioned method of applying a fixative, clinically, the fixative cannot be uniformly attached around the artificial bone graft, and thus it is impossible to ensure that the space between the artificial implant and the patient's medullary cavity can be filled, thereby affecting the artificial planting. The strength of the bond between the bone and the patient's medullary cavity.

In addition, the above method, in the process of inserting the artificial implant into the medullary cavity of the patient, The whole artificial implant is attached to the fixative, but in some specific treatment methods, it is not desirable for the fixative to be stained with the whole artificial implant, but it is desirable to have a part of the segment without the presence of a fixative, so that it can be borrowed Re-proliferation of the patient's bone tissue, integrated with the implanted implant; or in different forms of artificial bone graft structure, such as an artificial implant with an elastic body, to ensure the flexibility of the elastic body of the section Functionally, it is necessary to exclude the fixing agent from covering the outer edge of the section of the elastomer. The above-mentioned method of applying a fixing agent cannot meet the above requirements.

In addition, the subsequent fixative [such as bone cement] is usually a sticky paste. The shape is lacking in fluidity, and the hardening time is extremely short, so it is difficult to reach the slits located at the distal end, and it is easy to form a case where it is not confirmed, and the disadvantage is obvious.

In view of this, the inventors of the present invention have added research and innovation to reveal the present invention. Fixative application device with artificial implants.

The object of the present invention is to provide a fixative application device for artificial implants, comprising: an injection cavity, which is longitudinally disposed inward from the outer edge of the artificial implant; and a plurality of extrusion holes respectively from the artificial implant The outer edge is disposed in the direction of the injection chamber and is in communication with the injection chamber; and an injection valve includes a valve stem through which an injection passage is inserted to allow the valve stem to slide in the injection chamber to fix The injection agent is injected into the injection space formed between the outlet end of the injection channel and the injection chamber along the injection channel, and is extruded outward through the extrusion holes exposed to the injection space.

The fixative application device of the artificial implant disclosed in the present invention, wherein the artificial implant refers to an artificial femoral stem or other implant for implanting into a human bone marrow cavity.

The fixing agent applying device of the artificial implant disclosed in the invention, wherein the injection cavity is The inlet is locked to a base, and the base extends axially through a shaft hole to smoothly slide the valve stem of the injection valve, and a leak stop ring is disposed between the valve stem and the base If the valve stem of the injection valve is made, it can be axially slid according to the shaft hole of the base. The outer edge of the valve stem can be surrounded by a leak-proof gasket, and the leak-proof gasket is closely adhered to the cavity wall of the injection cavity to avoid the injected fixing agent, and the gap between the valve stem and the injection cavity 窜Out.

A fixative application device for an artificial implant according to the present invention, wherein the base is An adjusting sleeve is axially pivoted, the adjusting sleeve axially passes through a screw hole, and the valve stem of the injection valve is formed into a screw to be screwed into the screw hole of the adjusting sleeve If the adjusting sleeve is rotated, the valve stem can be interlocked to move up and down in the injection chamber.

The fixing agent applying device of the artificial implant disclosed in the invention can fix the fixing agent by the The injection end of the injection chamber of the artificial implant begins to inject, so that the fixative is gradually filled between the artificial implant and the patient's medullary cavity, so that the fixative can be surely filled between the artificial implant and the patient's medullary cavity.

The fixative application device for artificial implants disclosed in the present invention is implanted in a person After the implant is implanted in the medullary cavity of the patient, the valve stem of the injection valve is extended into the injection cavity to define the initial position of the fixative application, thereby ensuring that the elasticity of the artificial implant is not contaminated. Body to maintain the normal function of the elastomer.

The fixative application device for artificial implants disclosed in the present invention can be clarified by the following description and the accompanying drawings.

(10) ‧ ‧ artificial implants

(10a)‧‧‧ Elastomers

(11)‧‧‧Injection chamber

(110)‧‧‧Injection space

(111)‧‧‧ hole wall

(12) (12’) ‧‧‧Extrusion holes

(13) ‧‧‧ blocked

(14) ‧ ‧ pedestal

(141)‧‧‧Axis hole

(142) ‧‧‧ leaking ring

(15)‧‧‧Adjustment sleeve

(151)‧‧‧ screw holes

(20)‧‧‧Injection valve

(21)‧‧‧ valve stem

(22) ‧‧‧ leaking washers

(23)‧‧‧Injection channel

(23a) ‧ ‧ end exports

(24)‧‧‧Putting

(30) ‧ ‧ medullary cavity

(40) ‧‧‧ fixative

The first drawing is a schematic structural view of a first embodiment of the present invention; the second drawing is a schematic operation diagram of gradually applying a fixing agent upward from the first drawing; 3 is a schematic view showing a structure of a second embodiment of the present invention; and a fifth view showing an application state diagram of the embodiment shown in the fourth embodiment; Figure 6 is a schematic view showing the structure of a third embodiment of the present invention.

Referring to the first figure, the present invention relates to a fixing device applying device for artificial implants, which is an artificial implant (10) provided with an injection chamber (11) and a plurality of extrusion holes (12). After entering the patient's medullary cavity (30), the injection chamber (20) is slid into the injection chamber (11) of the artificial implant (10), and the fixing agent (40) is injected through the injection valve (20). a channel (23) is injected into the injection space (110) formed between the injection chamber (11) of the artificial implant (10) and the end outlet (23a) of the injection channel (23) by gradually withdrawing the An injection valve (20, as shown in the second figure) causes the fixing agent (40) to be gradually exposed to the injection space (110) and protruded through the extrusion hole (12) of the artificial implant (10). A device that is filled between the artificial implant (10) and the patient's medullary cavity (30).

As shown in the first and second figures, the fixing device applying device for artificial implants disclosed in the present invention comprises: an injection chamber (11) which is recessed longitudinally from the outer edge of the artificial implant (10). a plurality of extrusion holes (12) extending from the outer edge of the artificial implant (10) toward the injection chamber (11) and communicating with the injection chamber (11); and an injection valve (20) , comprising a valve stem (21), and axially extending through an injection channel (23), and the valve stem (21) is slidingly placed in the injection cavity (11) and along the injection cavity (11) Sliding axially so that the fixing agent (40) can be injected along the injection channel (23) into the injection space (110) formed between the end outlet (23a) and the injection chamber (11), followed by exposure Each of the extrusion holes (12) of the injection space (110) is outwardly scooped out.

As shown in the third figure, the fixative application device of the artificial implant disclosed in the present invention, Further comprising a blockage (13) placed in the injection cavity (11) of the artificial implant (10) such that the blockage (13) is in close contact with the periphery of the injection cavity (11) to close the injection space (110) Part of the inner extrusion hole (12') is formed to block the injected fixing agent (40) from penetrating the blocking (13) toward the closed extrusion hole (12'). By the arrangement of the obstruction (13), the position where the injected fixative (40) is injected from the artificial implant (10) into the patient's medullary cavity (30) can be set; for example, in the third figure, a fixed period can be applied. After the agent (40), a blocking (13) is placed to block a part of the extrusion hole (12'), and when the fixing agent (40) is reapplied, the applied fixing agent (40) can no longer be applied. Each of the extrusion holes (12') closed by the blockage (13) is outwardly scooped out, and can only be slid out from the other unsealed extrusion ports (12) out of the artificial implant (10) and the patient's pulp. Between the cavities (30), the artificial implant (10) is fixed in sections to the patient's medullary cavity (30).

As shown in the fourth and fifth figures, the immobilization agent of the artificial implant disclosed in the present invention is installed. The base of the injection chamber (11) is locked to a base (14), and the base (14) axially penetrates a shaft hole (141) to smoothly slide the injection valve (20) The valve stem (21) is inside, and between the valve stem (21) and the base (14), a leak stop ring (142) is provided; if the valve stem (21) of the injection valve (20) is The axial hole (141) of the base (14) can be guided to axially slide. The outer edge of the valve stem (21) of the present invention is capable of enclosing the leakage preventing washer (22) such that the leakage preventing gasket (22) is in close contact with the peripheral edge of the cavity wall (111) of the injection chamber (11).

As shown in the sixth figure, the fixative application device of the artificial implant disclosed in the present invention, The adjusting base (14) is axially pivotally connected to the base (14), so that the adjusting sleeve (15) axially penetrates a screw hole (151), and the injection valve (20) is arranged. The valve stem (21) is formed as a screw to be screwed into the screw hole (151) of the adjusting sleeve (15). When the adjusting sleeve (15) is rotated, the injection valve can be interlocked. The valve stem (21) of (20) is axially displaced in the injection chamber (11).

As shown in the first figure, the fixative application device of the artificial implant disclosed in the present invention, Wherein the injection valve (20) further comprises a push rod (24), which is slid into the injection passage in the valve stem (21) (23), in which the fixing agent (40) pre-filled in the injection channel (23) is pushed outward; or, at the top end of the valve stem (21) of the injection valve (20), a tube body is attached (Fig. Not shown) for guiding the fixative (40) into the injection channel (23) and causing the introduced fixative (40) to be scooped out by the end outlet (23a) of the valve stem (21).

The fixative application device of the artificial implant disclosed by the invention can be applied when The valve stem (21) of the injection valve (20) is pushed into the bottom end of the injection chamber (11) of the artificial implant (10). At this time, as shown in the first figure, the push rod is pushed in the P direction ( 24), the fixing agent (40) pre-filled in the injection channel (23) is continuously pulled out according to the end outlet (23a) of the injection channel (23), and the operator regards the operation condition, as shown in the second figure. It is shown that the valve stem (21) is gradually retracted in the U direction, so that the fixing agent (40) can be distantly approached, and gradually exposed between the end outlet (23a) of the injection passage (23) and the injection chamber (11). Each of the extrusion holes (12) is scooped outwardly and filled between the artificial implant (10) and the patient's medullary cavity (30); thus, the present invention can make the applied fixative (40) far into the artificial The slit formed between the implant (10) and the patient's medullary cavity (30) can be surely filled in the slit between the artificial implant (10) and the patient's medullary cavity (30) to solve the conventional problem. The fixative (40) could not reach the distal slit, and a problem of good fixation between the artificial implant and the patient's medullary cavity could not be obtained.

The fixative application device of the artificial implant disclosed by the present invention is in the artificial After the implant (10) is placed in the medullary cavity (30) of the patient, the fixative (40) is applied, so that during the insertion of the artificial implant (10), there is no fixative in the medullary cavity (30) of the patient. The presence of (40), therefore, the elastomer (10a) to which the artificial implant (10) is attached is not contaminated by the fixative (40), and can ensure the integrity of the artificial implant (10), for example It can ensure that the elastic body (10a) to which the artificial implant (10) is attached can still maintain the function of elastic compression and buffering external force, and the novelty and progress of the invention are obvious.

The structure and shape of the present invention can be modified and applied without departing from the spirit and scope of the present invention, and the present invention is not limited.

(10) ‧ ‧ artificial implants

(11)‧‧‧Injection chamber

(110)‧‧‧Injection space

(111)‧‧‧ hole wall

(12)‧‧‧Extrusion holes

(20)‧‧‧Injection valve

(21)‧‧‧ valve stem

(22) ‧‧‧ leaking washers

(23)‧‧‧Injection channel

(23a) ‧ ‧ end exports

(24)‧‧‧Putting

(30) ‧ ‧ medullary cavity

(40) ‧‧‧ fixative

(P) ‧‧‧ push direction

Claims (8)

The fixing device applying device for artificial implants comprises: an injection cavity, which is recessed longitudinally from the outer edge of the artificial implant; a plurality of extrusion holes, from the outer edge of the artificial implant, toward the An injection chamber is bored and communicated with the injection chamber; and an injection valve includes a valve stem and axially penetrates an injection passage, and the valve stem is slidingly placed in the injection chamber, and along the The injection chamber is axially slid so that the fixing agent can follow the injection passage, and after being injected into the injection space formed between the end outlet of the injection passage and the injection chamber, follow the extrusion holes exposed to the injection space. Extrusion out. The fixing agent applying device of the artificial implant according to claim 1, further comprising a blockage placed in the injection cavity of the artificial implant so that the blockage is in close contact with the periphery of the injection cavity to close the injection space. Partially extruded holes. The fixing agent applying device of the artificial implant according to claim 1, wherein a base is locked at an inlet of the injection chamber, and the base axially penetrates a shaft hole to smoothly slide the valve of the injection valve The rod is inside. The fixative application device of the artificial implant according to claim 3, wherein a leak stop ring is disposed between the valve stem and the base. The fixing agent applying device of the artificial implant according to claim 1 or 3, wherein the outer edge of the valve stem is a ring sleeve sealing gasket so that the leakage preventing gasket is in close contact with the peripheral edge of the cavity wall of the injection chamber. The fixing agent applying device of the artificial implant according to claim 3, wherein the base is axially pivotally connected to an adjusting sleeve, the adjusting sleeve is threaded through a screw hole, and the valve stem of the injection valve is formed A screw is screwed into the screw hole of the adjusting sleeve. The fixing agent applying device of the artificial implant according to claim 1, wherein the injection valve further comprises a push rod that is slid into the injection passage in the valve stem to fix the fixing agent pre-filled in the injection passage Outreach. The fixative application device of the artificial implant according to claim 1, wherein the injection port top entrance of the injection valve is coupled to a tube body to guide the fixing agent into the injection channel.