CN106175994B - Fixative applying device for artificial implant - Google Patents

Abstract

A fixative applicator for artificial implants, comprising: an injection cavity disposed lengthwise and inwardly from an outer edge of the artificial implant; a plurality of extrusion holes respectively penetrate from the outer edge of the artificial implant to the direction of the injection cavity and are communicated with the injection cavity; and the injection valve comprises a valve rod which penetrates through an injection channel, and the valve rod is arranged in the injection cavity in a sliding manner in a matching manner, so that the fixing agent can be injected into an injection space formed between the tail end outlet of the injection channel and the injection cavity along the injection channel and then is extruded outwards along each extrusion hole exposed in the injection space.

Description

Fixative applying device for artificial implant

technical field

The invention relates to a fixative application device for artificial implants, especially a device for controlling the application position of the fixative by sliding an injection valve in the artificial implant.

Background technique

Human bones, such as hip joints, may be deformed and acetabular worn due to congenital hip joint dysplasia, degeneration, lesions or external forces, making the patient's legs sore and difficult to walk. troubled. Most of the current solutions are artificial hip replacement, so that patients do not need to bear the discomfort caused by hip joint disease. The above-mentioned artificial hip arthroplasty involves implanting a long artificial implant in the medullary cavity of the patient's femur, such as a femoral stem, and then connecting a piece of bone between the top of the artificial implant and the acetabulum to complete The replacement surgery.

At present, the artificial implants used in medical treatment are integrally formed of metal materials, which are downwardly tapered and are used to implant into the medullary cavity of the patient's femur. In order to make the implanted artificial implants fasten on the patient's In the medullary cavity, the fixative is usually filled at the entrance of the patient's medullary cavity first, and then the artificial implant is inserted. When the artificial implant is inserted, the fixative will be entrained around the artificial implant and enter the patient's medullary cavity , to be hardened to achieve the purpose of fixing.

However, in the above-mentioned method of applying the fixative, the fixative cannot evenly adhere to the surrounding of the artificial bone graft clinically, thus it cannot ensure that the gap between the artificial implant and the patient's medullary cavity can be filled, which will affect the artificial bone graft. The strength of the bond between the bone and the patient's medullary cavity.

In addition, the above-mentioned method, in the process of inserting the artificial implant into the patient's medullary cavity, will make the whole artificial implant adhere to the fixative, but in some specific treatment methods, it is not desirable that the fixative be stained with the entire artificial implant. Instead, it is hoped that there is no fixative in some sections, so that the artificial implant can be integrated with the implanted artificial implant through the regeneration of the patient's bone tissue; or in different forms of artificial bone graft structures, such as joints with In order to ensure the flexible elastic function of the elastic body of a section of artificial implant, it is necessary to remove the fixing agent from covering the outer edge of the elastic body.

In addition, the fixative (such as bone cement) used for bonding is usually in the form of viscous paste, lacks fluidity, and has a very short hardening time, so it is difficult to reach all the remote slits, and it is easy to cause inaccurate bonding , and show its disadvantages.

In view of this, the inventor of the present invention made research innovations and disclosed a fixative applying device for an artificial implant shown in the present invention.

Contents of the invention

The purpose of the present invention is to provide a fixative application device for artificial implants, comprising: an injection chamber, which is arranged inwards lengthwise from the outer edge of the artificial implant; The outer edge of the outer edge of the injection cavity is pierced towards the injection cavity and communicated with the injection cavity; and an injection valve includes a valve stem passing through an injection channel, so that the valve stem can be snugly slid in the injection cavity so that the fixative is injected along the injection cavity. After the channel is injected into the injection space formed between the outlet at the end of the injection channel and the injection cavity, it is extruded through the extrusion holes exposed in the injection space.

The present invention discloses a fixative application device for artificial implants, wherein the artificial implants refer to artificial femoral stems or other implants for implanting into human bone marrow cavity.

The fixative application device for artificial implants disclosed by the present invention, wherein a base is locked at the entrance of the injection cavity, and the base axially passes through a shaft hole, so as to fitly slide the valve stem of the injection valve on the Inside, an anti-leakage ring is provided between the valve stem and the base; in this way, the valve stem of the injection valve can slide axially guided by the shaft hole of the base. The outer edge of the above-mentioned valve stem can still be covered with a leak-proof gasket, and the leak-proof gasket is tightly connected with the cavity wall of the injection cavity to prevent the injected fixative from escaping through the gap between the valve stem and the injection cavity. out.

The fixative application device for artificial implants disclosed by the present invention, wherein the base is axially pivoted to an adjustment sleeve, and the adjustment sleeve is axially pierced with a screw hole, and the valve stem of the injection valve is connected to the A screw rod is formed to be screwed in the screw hole of the adjusting sleeve in a consistent manner, so that when the adjusting sleeve is rotated, the valve rod can be linked to move up and down in the injection chamber.

The fixative application device for the artificial implant disclosed in the present invention can inject the fixative from the bottom of the injection cavity of the artificial implant, so that the fixative gradually fills the gap between the artificial implant and the patient's medullary cavity from far to near, The fixative can be reliably filled between the artificial implant and the patient's medullary cavity.

The fixative applying device for the artificial implant disclosed in the present invention, since the artificial implant is implanted in the patient's medullary cavity, the valve stem of the injection valve extends into the position of the injection cavity to limit the application of the fixative. The starting position of the artificial implant can thus be guaranteed not to contaminate the elastic body connected to the artificial implant, so as to maintain the normal function of the elastic body.

The fixing agent applying device of the artificial implant disclosed in the present invention can be clarified from the following description and the accompanying drawings.

Description of drawings

Fig. 1 is the structural representation of the first embodiment of the present invention;

Figure 2 is a schematic diagram of the operation of applying a fixative gradually upwards from Figure 1;

Fig. 3 is a schematic diagram of the structure of the present invention containing a blockage;

4 is a schematic cross-sectional structure diagram of a second embodiment of the present invention;

FIG. 5 is an application state diagram showing the embodiment shown in FIG. 4;

Fig. 6 is a schematic structural diagram of a third embodiment of the present invention.

In the picture:

10-artificial implant 10a-elastomer 11-injection cavity

110-injection space 111-hole wall 12-extrusion hole

12' Extrusion Hole 13-Block 14-Base

141-shaft hole 142-leak ring 15-adjusting sleeve

151-screw hole 20-injection valve 21-valve stem

22-Anti-leakage gasket 23-Injection channel 23a-End outlet

24-push rod 30-medullary cavity 40-fixative

Detailed ways

Please refer to FIG. 1, the present invention relates to a fixative application device for artificial implants. After placing an artificial implant 10 with an injection cavity 11 and a plurality of extrusion holes 12 into the medullary cavity 30 of a patient, Slide an injection valve 20 into the injection cavity 11 of the artificial implant 10, and inject the fixative 40 into the injection cavity 11 of the artificial implant 10 and the end of the injection channel 23 along the injection channel 23 of the injection valve 20 In the injection space 110 formed between the outlets 23a, by gradually retreating the injection valve 20, as shown in FIG. The outlet hole 12 emerges to fill the device between the artificial implant 10 and the patient's medullary cavity 30 .

As shown in Figures 1 and 2, the fixative application device for the artificial implant disclosed by the present invention includes: an injection cavity 11, which is recessed inwardly from the outer edge of the artificial implant 10; a plurality of extrusion holes 12, Perforated from the outer edge of the artificial implant 10 toward the injection cavity 11, and communicated with the injection cavity 11; and an injection valve 20, which contains a valve stem 21, and axially passes through an injection channel 23, and the The valve stem 21 is slidably placed in the injection cavity 11 and can slide axially along the injection cavity 11, so that the fixative 40 can be injected along the injection channel 23 between the end outlet 23a and the injection cavity 11. After the injection space 110 , it escapes along the extrusion holes 12 exposed to the injection space 110 .

As shown in Figure 3, the fixative application device for artificial implants disclosed by the present invention further includes a stopper 13 placed in the injection cavity 11 of the artificial implant 10, so that the stopper 13 is in close contact with the surroundings of the injection cavity 11 , so as to close part of the extrusion hole 12 in the injection space 110, so as to prevent the injected fixing agent 40 from penetrating through the blockage 13 and escaping toward the closed extrusion hole 12'. By setting the blocking 13, it is possible to set the position where the injected fixative 40 is injected into the patient's medullary cavity 30 from the artificial implant 10; for example, in FIG. , in order to block part of the extrusion holes 12, when the fixative 40 is applied again, the applied fixative 40 can no longer escape outwards through each of the extrusion holes 12 closed by the blockage 13, and can only escape from the The other unclosed extrusion ports 12 escape out between the artificial implant 10 and the patient's medullary cavity 30 , so that the artificial implant 10 is fixed to the patient's medullary cavity 30 in sections.

As shown in Figures 4 and 5, the fixative application device for artificial implants disclosed by the present invention, wherein a base 14 is locked at the entrance of the injection chamber 11, and the base 14 axially passes through a shaft hole 141, so as to Fittingly slide the valve stem 21 of the injection valve 20 inside, and an anti-leakage ring 142 may be provided between the valve stem 21 and the base 14; if so, the valve stem 21 of the injection valve 20 can follow the base The shaft hole 141 of 14 is guided to slide axially. According to the present invention, the outer edge of the valve stem 21 can be surrounded by the anti-leakage gasket 22 so that the anti-leakage gasket 22 is in close contact with the periphery of the hole wall 111 of the injection cavity 11 .

As shown in Figure 6, the fixative application device for artificial implant disclosed by the present invention, wherein an adjustment sleeve 15 is axially pivoted on the base 14, so that the adjustment sleeve 15 axially passes through a screw hole 151, and make the valve rod 21 of the injection valve 20 form a screw rod, so as to be screwed in the screw hole 151 of the adjustment sleeve 15, so that when the adjustment sleeve 15 is rotated, the injection valve 20 can be linked The valve stem 21 is axially displaced in the injection chamber 11.

As shown in FIG. 1 , the present invention discloses a fixative application device for artificial implants, wherein the injection valve 20 further includes a push rod 24 that slides into the injection channel 23 in the valve stem 21 to pre-fill the The fixing agent 40 in the injection channel 23 is pushed out; or, at the top of the valve stem 21 of the injection valve 20, a pipe body (not shown) is connected to guide the fixing agent 40 into the injection channel 23, and make The introduced fixing agent 40 escapes from the outlet 23a at the end of the valve stem 21 .

The fixative applying device for the artificial implant disclosed in the present invention, when in use, can push the valve stem 21 of the injection valve 20 into the bottommost end of the injection cavity 11 of the artificial implant 10, at this time, as shown in Figure 1 , push the push rod 24 in the direction of P, and the fixative 40 preloaded in the injection channel 23 will continue to escape along the terminal outlet 23a of the injection channel 23. The operator depends on the operation situation, as shown in Figure 2, Gradually retreat the valve stem 21 in the U direction, so that the fixative 40 can be gradually exposed to the extrusion holes 12 between the end outlet 23a of the injection channel 23 and the injection cavity 11 from far to near, and then filled manually. Between the implant 10 and the patient's medullary cavity 30; for this reason, the present invention can make the applied fixative 40 reach as far as the slit formed between the artificial implant 10 and the patient's medullary cavity 30, and can reliably fill it The slit between the artificial implant 10 and the patient's medullary cavity 30 solves the conventional problem that some artificial implants and the patient's medullary cavity cannot be well fixed because the fixative 40 cannot reach the remote slit.

The fixative applying device for the artificial implant disclosed in the present invention applies the fixative 40 after the artificial implant 10 is placed in the medullary cavity 30 of the patient. Therefore, during the process of inserting the artificial implant 10, the patient There is no fixative 40 in the medullary cavity 30, so the elastic body 10a connected to the artificial implant 10 will not be polluted by the fixative 40, which can ensure the functional integrity of the artificial implant 10, for example, can ensure The elastic body 10a connected to the artificial implant 10 can still maintain the integrity of the function of being elastically compressible and buffering external force, which shows the novelty and progress of the present invention.

The structures and shapes disclosed in the present invention can be modified and applied without violating the spirit and scope of the present invention, and the present invention is not self-limiting.

Claims (6)

1. a kind of fixative bringing device of implant characterized by comprising an injecting cavity, by the outer rim of implant Lengthways set to the concave；Multiple extrusion cavities wear towards the injection cavity direction from the outer rim of the implant and connect with the injecting cavity It is logical；And an introduction valve, containing a valve rod and axially through there is an injection canal, and cunning is placed in the injection to the valve rod in consistent manner It can be slid in chamber and axially along the injecting cavity, so that fixative is followed the injection canal and is flowed into the end of the injection canal and go out After the injection space constituted between mouth and the injecting cavity, squeezed out outward along the respectively extrusion cavities for being exposed to the injection space, In the injecting cavity one pedestal of entrance interlocking, which axially runs through an axis hole, with the valve rod of the sliding sleeve introduction valve in consistent manner In interior, in addition the pedestal is axially pivotally connected an adjustment sleeve, enables the adjustment sleeve wear a screw hole, and enable the valve rod of the introduction valve A screw rod is formed, be screwed together in the screw hole of the adjustment sleeve in consistent manner.

2. the fixative bringing device of implant as described in claim 1, which is characterized in that further include an obstruction and be placed in In the injecting cavity of the implant, enable the obstruction with it is closely sealed around the injecting cavity, with close the part in the injection space squeeze Portal.

3. the fixative bringing device of implant as described in claim 1, which is characterized in that be equipped between the valve rod and the pedestal Seal ring.

4. the fixative bringing device of implant as described in claim 1, which is characterized in that the outer rim ring set leak-stopping of the valve rod Washer enables the cave wall periphery of the leakage washer and the injecting cavity closely sealed.

5. the fixative bringing device of implant as described in claim 1, which is characterized in that the introduction valve further includes one The fixative being loaded in the injection canal in advance is pushed outwardly by pusher slide together in the injection canal in the valve rod.

6. the fixative bringing device of implant as described in claim 1, which is characterized in that the injection canal top of the introduction valve End entrance linking has a tube body, is entered in the injection canal with guiding fixative.