JP3243138U - medical implant device - Google Patents

Abstract

A simple and easy-to-operate medical implant device is provided to ensure the safety and accuracy of implant surgery and to reduce the risk of postoperative infection. Kind Code: A1 The present invention is a medical implant device comprising a porous implant body and an implantation aid, wherein the implantation aid includes a hollow cannula for accommodating the porous implant body and a a plunger rod inserted into the hollow cannula; a first assembly portion is provided on the circumference side of one end of the hollow cannula; a second assembly portion is provided on the circumference side of one end of the plunger rod; A rod is attached to the hollow cannula by connecting to the first assembly via the second assembly, and the plunger rod is moved linearly along the axial direction of the hollow cannula to move the hollow cannula. Push the porous implant body towards the other end of the cannula. [Selection drawing] Fig. 1

Description

TECHNICAL FIELD The present invention relates to a medical implant device, and more particularly to a medical implant device with a simple structure and easy operation.

As we age, body tissues or organs are easily damaged or destroyed to varying degrees due to factors such as aging, injury, or disease. It is a repair method or alternative tissue or organ that is suitable for the patient because it aggravates the damage to the body and even poses a life-threatening risk and places an extremely heavy burden and pressure on the patient, his/her family, and society as a whole. The search for is the current research institute's research and development goal.

Modern biotechnology uses a combination of biomaterials and tissue cell culture techniques to provide methods of replacing, repairing, or reconstructing damaged tissues or organs to help restore health and extend life in patients. It has gradually developed a new research field of tissue engineering to try.

During surgery, medical professionals generally use various surgical instruments to insert implants as repair or replacement tissues or organs into the correct position in the patient's body. Instruments must be thoroughly cleaned and sterilized because they come into frequent contact with the environment. This creates a susceptibility situation, increasing the patient's risk of postoperative infection.

Focusing on the technical problems existing in the above-mentioned conventional technology, the present inventors have developed a simple and easy-to-operate implant device in order to ensure the safety and accuracy of implant surgery and reduce the risk of postoperative infection. i think i need to think about it.

To achieve the above object, the present invention provides a medical implant device comprising a porous implant body and an implantation aid. The implantation aid includes a hollow cannula for accommodating the porous implant body, a plunger rod having one end inserted into the hollow cannula, and a first assembly part on the peripheral side of one end of the hollow cannula. a second assembly is provided around one end of the plunger rod, the plunger rod is coupled to the first assembly via the second assembly and attached to the hollow cannula; The plunger rod is moved linearly along the axial direction of the hollow cannula to push the porous implant body toward the other end of the hollow cannula.

Additionally, the first assembly is threadedly engaged with the second assembly to gradually push the porous implant body within the hollow cannula.

Further, the plunger rod comprises a rod inserted into the hollow cannula and a handle provided at one end of the rod.

Further, the rod comprises a rod body and a pressing block provided at the end of the rod body.

Further, the outer diameter of the push block is greater than the outer diameter of the rod body and equal to or less than the inner diameter of the hollow cannula.

Additionally, the top side of the push block is either substantially flush with or slightly protruding from the other end of the hollow cannula to fully push out the porous implant body.

Further, the handle includes a handle body having a groove for providing the rod, and a protrusion provided on the outer edge of the groove.

Furthermore, in order to limit the movement of the plunger rod with respect to the hollow cannula, a stopper member is provided on the outer periphery of the hollow cannula for the protrusion to abut.

Furthermore, at least slits are provided on the circumference side of the other end of the hollow cannula to form a plurality of elastic claws.

Further, the first assembly portion is a male screw provided on the outer peripheral side of one end of the hollow cannula, and the second assembly portion is provided on the inner peripheral side of the concave groove and is screwed with the male screw. female thread.

Furthermore, the outer diameter of the porous implant body is equal to or smaller than the inner diameter of the hollow cannula.

Furthermore, said porous implant body is made of a bioabsorbable polymeric material.

In the medical implant device of the present invention, the plunger rod moves linearly and gradually within the hollow cannula, thereby slowly pushing the porous implant body put into the hollow cannula and inserting the porous implant into the patient's body. It has the effect of embedding and fixing the body.

It is a schematic diagram showing the appearance of the medical implant device of the present invention. 1 is a schematic exploded view showing the structure of the medical implant device of the present invention; FIG. FIG. 4 is a schematic exploded view showing the structure of the medical implant device of the present invention viewed from another angle; 1 is a schematic cross-sectional view of a medical implant device of the present invention; FIG. as well as 5 is a partial enlarged cross-sectional view of a different embodiment of the portion enclosed by the dashed circle in FIG. 4; FIG. ~ FIG. 4 is a schematic view of the movement of the plunger rod of the medical implant device of the present invention as it moves to different positions relative to the hollow cannula;

The detailed description and technical contents of the present invention are described as follows with reference to the drawings. Also, the dimensional ratios in the drawings in the present invention are for convenience of explanation only, and are not drawn at actual dimensional ratios. These drawings and their proportions are not intended to limit the scope of the invention. This point will be explained first.

1 to 4, which are schematic views, schematic exploded views of the structure from different angles, and schematic cross-sectional views showing the appearance of the medical implant device of the present invention.

The present invention discloses a medical implant device 100 . The medical implant device 100 includes a porous implant body 10 and an implantation aid 20. Using the implantation aid 20, the porous implant body 10 is gradually implanted into a patient's body.

The porous implant body 10 is made of a bioabsorbable polymeric material, and the material is polyglycolic acid (PGA), polylactic acid (PLA), polylactic acid-glycolic acid copolymer ( selected from the group of poly(glycolic co-Lactic acid, PLGA), polyanhydrides, polycapralactone, polydioxanone and polyorthoester. In a preferred embodiment, the material of the porous implant body 10 is polylactic-co-glycolic acid (PLGA).

A pore size of the porous implant body 10 is between 50 and 500 um, and the porous implant body 10 includes a main body, at least one hollow cavity located in the main body for accommodating a tissue block, and the hollow a top cover for covering the opening of the cavity of the body, the material of the main body and the top cover being the same. The tissue block is, for example, but not limited to, cartilage tissue or bone tissue of any animal tissue, the particle size of the tissue block is between 500 and 1000 μm, and the tissue block is partially dissolved by an enzyme. After that, it is put into the hollow cavity, and the tissue is three-dimensionally grown from the inside to the pores of the porous implant body 10 around the periphery, and the new tissue is grown in the form of direct tissue, and the tissue amount of the minimum volume is the shortest. Realize the in vitro culture of the required tissue in time. In order to avoid overflow of the tissue blocks in the hollow cavity of the porous implant body 10, the particle size of the tissue blocks is larger than the pore size of the surrounding matrix of the main body. The external shape of the porous implant body 10 can be arbitrarily changed according to actual needs, and the porous implant body 10 can be, for example, cylindrical, cubic or any other shape, but not limited thereto.

The implantation aid 20 includes a hollow cannula 21 and a plunger rod 22 having one end inserted into the hollow cannula 21. The hollow cannula 21 is used to accommodate the porous implant body 10, and is porous. The outer diameter OD1 of the porous implant body 10 is equal to or smaller than the inner diameter ID1 of the hollow cannula 21 to facilitate the insertion of the porous implant body 10 into the hollow cannula 21 . The material of the implantation aid 20 is medical stainless steel, or a single metal, alloy, plastic or other material compatible with medical grade, and the hollow cannula 21 and the plunger rod 22 are made of the same or different materials. be done. The internal shape of the hollow cannula 21 is circular to accommodate the porous implant body 10 of cylindrical ("Fig. 2"), cubic shape or any other shape.

A first assembly portion S1 is provided around one end of the hollow cannula 21, a second assembly portion S2 is provided around one end of the plunger rod 22, and the plunger rod 22 connects the second assembly portion S2. The plunger rod 22 is linearly moved along the direction of the axis C of the hollow cannula 21 so as to move the hollow cannula 21. Push the porous implant body 10 towards the other end. Here, "one end of the hollow cannula 21" refers to the position inside the hollow cannula 21 where the porous implant body 10 is inserted. The first assembly part S1 of the hollow cannula 21 gradually pushes the porous implant body 10 in the hollow cannula 21 to implant the porous implant body 10 into the patient's body, so that the plunger rod It is screwed with the second assembly portion S2 of 22. Specific embodiments of the first assembly part S1 and the second assembly part S2 are described in detail in the following paragraphs.

The plunger rod 22 includes a rod 221 inserted into the hollow cannula 21 and a handle 222 provided at one end of the rod 221. The handle 222 is gripped by the practitioner to apply force to the rod 221. Make it easy to add. Said rod 221 comprises a rod body 2211 and a pressing block 2212 provided at the end of said rod body 2211, said rod body 2211 being, for example, cylindrical, cubic or any other shape. Not limited. The outer diameter OD3 of the pushing block 2212 is larger than the outer diameter OD2 of the rod body 2211, so as to facilitate the rod body 2211 to move the pushing block 2212 within the hollow cannula 21. is equal to or less than the inner diameter ID1 of the .

As shown in FIG. 3, the external shape and size (cylindrical) of the porous implant body 10 and the pressing block 2212 are substantially the same as the internal shape and size (circular) of the hollow cannula 21. , the entire top end of the cylindrical pressing block 2212 is brought into contact with the same cylindrical porous implant body 10, and the plunger rod 22 applies force evenly to the porous implant body 10, and the applied force is , from distorting or damaging the porous implant body 10 due to an imbalance.

The handle 222 includes a handle body 2221 having a groove G, and a protrusion 2222 provided on the outer edge of the groove G. The groove G is used to install the rod 221, and the handle body 2221 is, for example, circular (“FIG. 1”), elliptical, rectangular, or any other shape, and the projection 2222 is, for example, completely or partially wrapped around the outer edge of the groove G. (“FIG. 1”), but is not limited thereto.

In one embodiment, as shown in FIGS. 2 and 3, the hollow cannula 21 is provided with the first assembly portion S1, which is a male screw, on the outer peripheral side of one end of the hollow cannula 21, and the second assembly portion S2. is a female thread that is provided on the inner peripheral side of the groove G and is screwed with the male thread. In another embodiment, the difference from the previous embodiment is that the relative mounting relationship between the aforementioned male and female threads can be interchanged (not shown). For example, one end of the hollow cannula 21 (the end facing the elastic claw 213) is provided with a female screw (that is, the first assembly portion S1) on the inner peripheral side, and a male screw (that is, the second assembly portion S1) is provided on the outer peripheral side of the handle 222. 2 assembly part S2) is provided to assemble the plunger rod 22 and the hollow cannula 21 using the above-mentioned female and male threads, so that the plunger rod 22 can be inserted into the hollow cannula 21 and the porous implant body. It has the effect of gradually pressing 10. The specific aspects of the first assembly part S1 and the second assembly part S2 in the present invention are not limited to the durability described above, and will be described here first.

A stopper member 211 is provided on the outer circumference of the hollow cannula 21, and the stopper member 211 is partially or completely wrapped around the outer circumference of the hollow cannula 21, for example. In one embodiment, as shown in FIG. 1, the stopper member 211 is used to abut the protrusion 2222 to limit the movement of the plunger rod 22 relative to the hollow cannula 21 and prevent the plunger from moving. The rod 22 should not protrude excessively and injure the patient. When the stopper member 211 abuts on the protruding portion 2222, the top side of the pressing block 2212 is substantially flush with the other end of the hollow cannula 21 or protrudes slightly so that the hollow cannula is The porous implant body 10 inside 21 is completely extruded to achieve the purpose of embedding the porous implant body 10 in the patient's body. Here, "the other end of the hollow cannula 21" refers to the position where the elastic claw 213 is provided. In another embodiment, the difference from the previous embodiment is that the outer edge of the recessed groove G of the handle body 2221 is a completely flat surface (not shown) without steps, i. Abutting the stopper member 211 with the complete flat surface without the portion 2222 can also have the effect of limiting the movement of the plunger rod 22 in the same manner.

Next, referring to "FIG. 5", it is a partial enlarged cross-sectional view of a different embodiment of the portion enclosed by the dashed circle in "FIG. 4".

At least one slit 212 is provided around the other end of the hollow cannula 21 to form a plurality of elastic claws 213. , that is, the position at which the porous implant body 10 is pushed out from within the hollow cannula 21 . At least one mark 214 is provided on the outer surface of the elastic claw 213, and the mark 214 is not limited to, for example, a scale or a combination of scale and letters and/or numbers (not shown). It is integrally formed on the elastic claw 213 . The markings 214 can help the practitioner identify the depth of insertion of the hollow cannula 21 into the human body.

In one embodiment, the thickness of the plurality of elastic claws 213 gradually increases from the inner end to the outer end of the hollow cannula 21, as shown in FIG. 5(a). In another embodiment, the difference from the previous embodiment is that the thickness of the plurality of elastic claws 213 from the inner end to the outer end of the hollow cannula 21 is Approximately the same, the elastic claw 213 is gradually inclined inward. In the above two embodiments, the inner diameter ID2 formed between the ends of the plurality of elastic claws 213 is smaller than the original inner diameter ID1 of the hollow cannula 21, and the plunger rod 22 pushes the porous implant body 10 into the elastic When pushing to the position of the claws 213, it provides a little resistance to inform the practitioner that the porous implant body 10 has been pushed between the resilient claws 213, and the plunger rod 22 is pushed to the position of the porous implant. When the body 10 is continuously pushed, the porous implant body 10 presses the plurality of elastic claws 213 and deforms outward, so that the porous implant body 10 can be easily pushed out of the hollow cannula 21. .

Reference is now made to FIG. 6, which is a schematic diagram of movement of the plunger rod of the medical implant device of the present invention in different positions of the hollow cannula. In the drawing, the position of the porous implant body in the hollow cannula is indicated by a dashed line.

First, after inserting the porous implant body 10 into the hollow cannula 21, as shown in FIG. The plunger rod 22 is inserted into the hollow cannula 21 until a threaded engagement is achieved, such as by rotating the plunger rod 22 clockwise (arrow A) or counterclockwise relative to the hollow cannula 21 . However, it is not limited to this. Next, after one end of the hollow cannula 21 is aligned with the patient's site where the porous implant body 10 is to be embedded, the stopper member 211 limits the plunger rod 22 and continues to rotate in the direction of arrow A. Push the porous implant body 10 in the hollow cannula 21 while continuing to rotate the plunger rod 22 in the direction of arrow A until the plunger rod 22 is unable to move, as shown in FIG. When the pressing block 2212 of the plunger rod 22 pushes out the porous implant body 10 in the hollow cannula 21 completely, it achieves the purpose of embedding the porous implant body 10 in the patient's body. Conversely, when the plunger rod 22 is rotated in the opposite direction of arrow A and the first assembly portion S1 is separated from the second assembly portion S2, the plunger rod 22 can be withdrawn from within the hollow cannula 21 .

In short, in the medical implant device of the present invention, the plunger rod linearly and progressively moves within the hollow cannula, thereby slowly pushing the porous implant body placed within the hollow cannula to form a porous body within the patient's body. It has the effect of embedding and nationalizing the quality implant body.

Although the present invention has been described in detail above, what is described above is only a preferred embodiment of the present invention, and the scope of implementation of the present invention is not limited to this. Of course, it is within the scope of protection of the present invention that equivalent changes and embellishments can be made according to the range.

REFERENCE SIGNS LIST 100 medical implant device 10 porous implant body 20 implantation aid 21 hollow cannula 211 stopper member 212 slit 213 elastic claw 214 mark 22 plunger rod 221 rod 2211 rod body 2212 pressing block 222 handle 2221 handle body 2222 protrusion A arrow C axis Core G Groove ID1 Inner diameter ID2 Inner diameter OD1 Outer diameter OD2 Outer diameter OD3 Outer diameter S1 First assembly part S2 Second assembly part

Claims (12)

a porous implant body;
a hollow cannula for accommodating the porous implant body; and a plunger rod having one end inserted into the hollow cannula, a first assembly portion being provided on the circumference side of one end of the hollow cannula, and the plunger rod A second assembly is provided on the circumferential side of one end of the cannula, the plunger rod is connected to the first assembly via the second assembly and attached to the hollow cannula, and the plunger rod is the hollow cannula. an implanting aid that is moved linearly along the axial direction of the cannula to push the porous implant body toward the other end of the hollow cannula. 2. The medical implant device of claim 1, wherein said first assembly threadably engages said second assembly to gradually push said porous implant body within said hollow cannula. 2. The medical implant device according to claim 1, wherein said plunger rod comprises a rod inserted into said hollow cannula and a handle provided at one end of said rod. 4. The medical implant device according to claim 3, wherein the rod comprises a rod body and a pressing block provided at the distal end of the rod body. 5. The medical implant device of claim 4, wherein the outer diameter of said pusher block is greater than the outer diameter of said rod body and equal to or less than the inner diameter of said hollow cannula. 5. The medical implant device of claim 4, wherein the top side of the push block is substantially flush with or slightly protrudes from the other end of the hollow cannula to fully push out the porous implant body. 4. The medical implant device according to claim 3, wherein the handle comprises a handle body having a groove for providing the rod, and a protrusion provided on the outer edge of the groove. 8. The medical implant device according to claim 7, wherein a stopper member is provided on the outer periphery of the hollow cannula for restricting movement of the plunger rod with respect to the hollow cannula, with which the projecting portion abuts. 9. The medical implant device according to claim 8, wherein at least slits are provided on the peripheral side of the other end of the hollow cannula to form a plurality of elastic claws. The first assembly portion is a male screw provided on the outer peripheral side of one end of the hollow cannula, and the second assembly portion is provided on the inner peripheral side of the concave groove and is a female screw that is screwed with the male screw. The medical implant device according to claim 7, wherein 2. The medical implant device of claim 1, wherein the outer diameter of said porous implant body is equal to or less than the inner diameter of said hollow cannula. 2. The medical implant device according to claim 1, wherein said porous implant body is made of a bioabsorbable polymeric material.