Implantable dosing and drainage device

Abstract

The utility model belongs to the technical field of medical instruments, and provides an implantable dosing and drainage device which comprises an injection seat and a lossless puncture needle, the injection seat comprises a base and a silica gel puncture layer, the silica gel puncture layer covers the surface of the base, and an accommodating cavity with a horizontal opening at one end is defined by the silica gel puncture layer; the lossless puncture needle is used for puncturing into the silica gel puncture layer and extending into the accommodating cavity for dosing or drainage, and comprises a needle head; the thickness of the silica gel puncture layer is one third of the length of the needle head. According to the implantable dosing and drainage device, on the basis of dual functions of dosing and drainage, the thickness of the silica gel puncture layer is limited, so that the situations of looseness, shaking and the like of the drainage needle head in the actual use process are avoided, and the drainage effect is improved.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and particularly to an implantable drug delivery and drainage device. Background Art

[0002] An implantable drug delivery device is a medical device used for long-term or continuous drug administration. Such a device is usually implanted into a patient's body by medical professionals and regularly inspected and replaced. During the use of an implantable drug delivery device, due to its overly sharp needle and relatively thin silicone layer of the injection seat, after multiple punctures, the silicone layer of the injection seat will be damaged, thus affecting the sealing performance of the implantable drug delivery device, and then problems such as infection and drug leakage will occur. Moreover, most conventional implantable drug delivery devices only have the single function of drug delivery.

[0003] In response to the above problems, existing research such as the patent application document with the publication number CN111330137A discloses a drug delivery device, which mentions that a support member made of a hard material is provided between the base and the top cover, and the support member is used to prevent the non-invasive needle from penetrating excessively, avoiding the situation where the liquid medicine is directly injected subcutaneously without flowing to the lesion site under the guidance of the drug delivery device. Moreover, the top cover can be punctured multiple times with a non-invasive needle without leakage, so that the liquid medicine can be replenished into the injection sac from outside the skin multiple times with a non-invasive needle, or the waste liquid medicine and purulent effusion can be aspirated from the injection sac multiple times.

[0004] However, in the actual application process, if drainage is to be carried out through the above device, situations such as the loosening and shaking of the drainage needle will occur, resulting in poor drainage effect. Summary of the Utility Model

[0005] In view of the above-mentioned disadvantages of the prior art, the present utility model provides an implantable drug delivery and drainage device to solve the problems that when the existing implantable drug delivery device is used for drainage, situations such as the loosening and shaking of the drainage needle are likely to occur, resulting in poor drainage effect, etc.

[0006] To achieve the above object and related objects, the present utility model provides an implantable drug delivery and drainage device, including an injection seat and a non-invasive puncture needle. The injection seat includes a base and a silicone puncture layer. The silicone puncture layer covers the surface of the base and encloses a receiving cavity with a horizontal opening at one end;

[0007] The non-invasive puncture needle is used to penetrate the silicone puncture layer and extend into the receiving cavity for drug delivery or drainage. The non-invasive puncture needle includes a needle tip;

[0008] The thickness of the silicone puncture layer is set to one-third of the length of the needle tip.

[0009] In an embodiment of the present application, the material of the base is hard silicone.

[0010] In an embodiment of the present application, the base is made of soft silicone, and a metal gasket is provided inside the base.

[0011] In an embodiment of the present application, the metal gasket is arranged to cover the projected area of the accommodating cavity on the base.

[0012] In an embodiment of the present application, the silicone puncture layer extends towards the horizontal opening direction and forms an upper step with a stepped structure, and the base extends towards the horizontal opening direction and forms a lower step with a stepped structure, and a horizontal channel is formed between the upper step and the lower step.

[0013] In an embodiment of the present application, the horizontal channel is communicated with the horizontal opening.

[0014] In an embodiment of the present application, the thickness of each part of the upper step is less than the thickness of the silicone puncture layer.

[0015] In an embodiment of the present application, the device further includes a catheter, and the catheter can be inserted and fixed in the horizontal channel.

[0016] In an embodiment of the present application, the non-destructive puncture needle is of a bent structure.

[0017] In an embodiment of the present application, the device further includes a positioning puncture needle.

[0018] The beneficial technical effects of the present utility model are as follows:

[0019] Based on the dual functions of drug administration and drainage, the thickness of the silicone puncture layer is limited in the implantable drug administration and drainage device of the present application to avoid situations such as loosening and shaking of the drainage needle during actual use, and improve the drainage effect.

[0020] The implantable drug administration and drainage device of the present application can be applied to the brain position, and its main function is implantable and reusable drug administration and effusion drainage.

[0021] The implantable drug administration and drainage device of the present application can continuously release drugs at a constant rate, maintain the drug concentration, avoid the peak-valley phenomenon caused by intermittent drug administration and uneven drug dosage, and can achieve the effect of continuous and stable drug administration.

[0022] The drugs provided by the implantable drug administration and drainage device of the present application can directly act on the target, avoid the side effects of other tissues in the body, and at the same time avoid the first-pass effect of the liver, improving the bioavailability. And because the drugs can be directly implanted and act on the target, the side effects on other tissues can be reduced.

[0023] The implantable drug administration and drainage device of the present application can avoid the discomfort, loss and pain caused after the administration of certain dosage forms. If serious allergic reactions or side effects are found, it can be quickly removed.

[0024] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and do not limit this application. Brief Description of the Drawings

[0025] The drawings herein are incorporated into the specification and form a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application. Obviously, the drawings in the following description are only some embodiments of this application, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts. In the drawings:

[0026] Figure 1 is a cross-sectional view of an exemplary injection seat of this application;

[0027] Figure 2 is another cross-sectional view of an exemplary injection seat of this application;

[0028] Figure 3 is a schematic structural diagram of an exemplary injection seat of this application;

[0029] Figure 4 is a schematic structural diagram of a catheter of this application;

[0030] Figure 5 is a schematic structural diagram of a non-destructive puncture needle of this application;

[0031] Figure 6 is Figure 5 a schematic structural diagram of the needle tip of the non-destructive puncture needle.

[0032] Reference Numerals

[0033] 1: base; 2: silicone puncture layer; 3: horizontal channel; 4: upper step; 5: lower step; 6: catheter; 7: non-destructive puncture needle; 71: needle tip; 11: metal gasket; 8: accommodation cavity. Detailed Embodiments

[0034] The following will describe the embodiments of the present invention with reference to the drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for explaining the present invention, rather than for limiting the protection scope of the present invention.

[0035] It should be noted that the illustrations provided in the following embodiments only schematically illustrate the basic concept of the present utility model. Therefore, only the components related to the present utility model are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and proportion of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0036] In the drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components. In the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "front", "rear", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be understood as a limitation of the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0037] The present utility model provides an implantable drug delivery and drainage device, including an injection seat and a non-destructive puncture needle 7. The injection seat includes a base 1 and a silicone puncture layer 2. The silicone puncture layer 2 covers the surface of the base 1 and encloses to form a receiving cavity with a horizontal opening at one end.

[0038] The non-destructive puncture needle 7 is used to pierce into the silicone puncture layer 2 and extend into the receiving cavity for drug delivery or drainage. The non-destructive puncture needle 7 includes a needle tip 71.

[0039] The thickness of the silicone puncture layer 2 is set to one-third of the length of the needle tip 71 of the non-destructive puncture needle 7.

[0040] In some embodiments, as Figure 3 shown, the injection seat of the present application is suitable for being buried under the skin. Further, it can be applied to the brain position and buried under the scalp without affecting life. When the implantable drug delivery and drainage device needs to be used, it can be directly connected through the non-destructive puncture needle 7 and can be used repeatedly for a long time with high convenience.

[0041] In some embodiments, the material of the silicone puncture layer 2 of the present application is soft silicone, and further soft silicone that meets biocompatibility. The puncture membrane at the top cover of the existing implantable drug delivery device is relatively thin. Although it is beneficial for the needle tip 71 to pierce in, during the drainage process, the relatively thin puncture membrane cannot effectively fix the drainage needle tip 71, and situations such as the loosening and shaking of the needle tip 71 are likely to occur, resulting in poor drainage effect. To solve this problem, the thickness of the silicone puncture layer 2 of the present application is improved, and its thickness is limited to one-third of the length of the needle tip 71 of the non-destructive puncture needle 7, which not only fixes the needle tip 71 to prevent it from shaking but also does not affect the convenience of the needle tip 71 piercing in.

[0042] In some embodiments, such as Figure 1 shown, the material of the base 1 of the present application can be hard silicone, and further hard silicone that meets biocompatibility. The present application uses hard silicone to prevent the non-damaging puncture needle 7 from penetrating excessively, avoiding the direct injection of the drug in the accommodating cavity into the subcutaneous tissue. In this embodiment, the overall sealing performance of the injection seat of the present application is good, and it is not easy to have drug leakage, resulting in infection of the treatment site; moreover, the entire injection seat is made of silicone, which can reduce the discomfort of the patient when buried under the skin.

[0043] In other embodiments, such as Figure 2 shown, the material of the base 1 of the present application can be soft silicone, and a metal gasket 11 is provided inside the base 1. In this embodiment, the present application uses soft silicone that meets biocompatibility to coat the metal gasket 11, improving the local hardness of the base 1 and preventing it from being punctured. The outer surface of the injection seat of the present application is entirely made of a soft material, and when buried under the skin, the discomfort of the patient is relatively small.

[0044] Furthermore, the material of the metal gasket 11 of the present application includes but is not limited to titanium alloy and stainless steel, and preferably 304 stainless steel.

[0045] Furthermore, the metal gasket 11 of the present application is arranged to be able to cover the projected area of the accommodating cavity on the base 1. The function of the metal gasket 11 of the present application is to prevent the non-damaging puncture needle 7 from penetrating the base 1. Therefore, its size only needs to be able to cover the area where the non-damaging puncture needle 7 can penetrate.

[0046] In some embodiments, such as Figure 4 shown, the device of the present application further includes a catheter 6. The catheter 6 is made of a soft material that meets biocompatibility, such as materials like silicone, latex, polyurethane, nylon, or nylon elastomer.

[0047] In some embodiments, the device of the present application further includes a positioning puncture needle, and this positioning puncture needle is a slender needle. In the actual process of the implantable drug delivery and drainage device, the catheter 6 needs to be first put on the positioning puncture needle, the positioning puncture needle is inserted into the lesion until the end, so that one end of the catheter 6 touches the lesion site, the positioning puncture needle is taken out, and the excess catheter 6 is cut off according to the insertion depth of the catheter 6 and the position of the injection seat; then the cut-off end of the catheter 6 is connected to the drug outlet or drainage port of the injection seat. Therefore, to ensure the smooth flow of the drug or effusion between the catheter 6 and the injection seat without leakage, a stable connection between the catheter 6 and the injection seat needs to be ensured.

[0048] Based on this, as Figure 1 and Figure 2As shown, the silicone puncture layer 2 of the present application extends towards the horizontal opening direction and forms an upper step 4 with a stepped structure. The base 1 extends towards the horizontal opening direction and forms a lower step 5 with a stepped structure. A horizontal channel 3 is formed between the upper step 4 and the lower step 5. The horizontal channel 3 communicates with the horizontal opening, and the catheter 6 can be inserted and fixed in the horizontal channel 3. The present application does not require an additional locking member to fix the catheter 6 and the injection seat together. Instead, by utilizing the tightening effect between the upper step 4 and the lower step 5 and their stepped structure, the catheter 6 can be easily inserted and fixed in the horizontal channel 3. Moreover, under the friction force of the upper step 4 and the lower step 5 and the action of the horizontal channel 3, the catheter 6 is not easily detached from the injection seat.

[0049] Furthermore, the thickness of each part of the upper step 4 of the present application is less than the thickness of the silicone puncture layer 2, and the thickness of each part of the lower step 5 is less than the thickness of the base 1. Since the upper step 4 does not play a role in fixing the non-damaging puncture needle 7, its thickness does not need to be thickened. If the thickness of the upper step 4 is too large, the difficulty of inserting the catheter 6 increases.

[0050] Furthermore, the upper step 4 and the silicone puncture layer 2 of the present application can be integrally formed, and the lower step 5 and the base 1 can be integrally formed. Furthermore, the implantable drug delivery and drainage device of the present application has a simple structure and is convenient to prepare.

[0051] Furthermore, as Figure 5 shown, the non-damaging puncture needle 7 used in the device of the present application is of a bent structure, and further can be a butterfly needle. Furthermore, as Figure 6 shown, the needle tip 71 of the non-damaging puncture needle 7 is an arc-shaped cutter head. Compared with an ordinary injection needle, when the non-damaging puncture needle 7 of the present application pierces the silicone puncture layer 2, the silicone will not be damaged and its sealing performance will not be affected. Furthermore, the implantable drug delivery and drainage device of the present application can be punctured multiple times and can be repeatedly used for a long time.

[0052] In some embodiments, the device of the present application further includes a drainage tube, which is made of a flexible tube material and can be a commonly used drainage tube on the market. The drainage tube of the present application can be connected to the non-damaging puncture needle 7 and is used for draining the effusion in the lesion site.

[0053] In some embodiments, the usage method of the device of the present application is as follows:

[0054] Put the catheter 6 on the positioning puncture needle, insert the positioning puncture needle into the lesion until the end, make one end of the catheter 6 contact the lesion site, and then take out the positioning puncture needle;

[0055] Cut off the redundant catheter 6 according to the insertion depth of the catheter 6 and the position of the injection seat, and insert and fix the cut-off end of the catheter 6 into the horizontal channel 3 of the injection seat;

[0056] Fix the injection seat under the scalp at a certain place on the head to complete the installation of the implantable drug delivery and drainage device.

[0057] When the patient needs to be administered medicine or have fluid drained, the non-invasive puncture needle 7 is inserted into the silicone puncture layer 2 and extends into the accommodation cavity. The non-invasive puncture needle 7 delivers medicine to the lesion site through an external syringe (such as an infusion set), or the non-invasive puncture needle 7 drains the accumulated fluid at the lesion through a drainage device such as an external drainage tube.

[0058] In the present application, the implantable medicine administration and drainage device is usually buried under the scalp, does not affect life, and can be directly connected through the non-invasive puncture needle 7 when needed, and can be used repeatedly for a long time with high convenience.

[0059] In the present application, the implantable medicine administration and drainage device can repeatedly and continuously administer medicine to the lesion site or drain the accumulated fluid, rather than re-establishing a channel each time medicine is administered or fluid is drained. The implantable medicine administration and drainage device has the advantages of continuous and stable medicine administration, high drug utilization rate, small side effects, and low discomfort.

[0060] The above embodiments only exemplarily illustrate the principles and effects of the present invention, rather than limiting the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. An implantable drug delivery and drainage device, characterized in that: It includes an injection seat and a non-destructive puncture needle, wherein the injection seat includes a base and a silicone puncture layer, wherein the silicone puncture layer is covered on the surface of the base and encloses a receiving cavity with a horizontal opening at one end; The non-destructive puncture needle is used to pierce the silicone puncture layer and extend into the accommodating cavity for drug administration or drainage, and the non-destructive puncture needle includes a needle head; The thickness of the silicone puncture layer is set to be one third of the length of the needle.

2. The implantable drug delivery and drainage device according to claim 1, characterized in that: The base is made of hard silicone.

3. The implantable drug delivery and drainage device according to claim 1, characterized in that: The base is made of soft silicone and a metal gasket is arranged inside the base.

4. The implantable drug delivery and drainage device according to claim 3, characterized in that: The metal gasket is configured to cover a projection area of ​​the accommodating cavity on the base.

5. The implantable drug delivery and drainage device according to claim 1, characterized in that: The silicone puncture layer extends toward the horizontal opening and forms an upper step with a stepped structure, the base extends toward the horizontal opening and forms a lower step with a stepped structure, and a horizontal channel is formed between the upper step and the lower step.

6. The implantable drug delivery and drainage device according to claim 5, characterized in that: The horizontal channel is in communication with the horizontal opening.

7. The implantable drug delivery and drainage device according to claim 5, characterized in that: The thickness of each part of the upper step is less than the thickness of the silicone puncture layer.

8. The implantable drug delivery and drainage device according to claim 6, characterized in that: The device further comprises a catheter which can be inserted into and fixed in the horizontal channel.

9. The implantable drug delivery and drainage device according to claim 1, characterized in that: The non-destructive puncture needle is a curved structure.

10. The implantable drug delivery and drainage device according to claim 1, characterized in that: The device also includes a positioning puncture needle.

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