Neurosurgery interventional therapy implantation dosing device

Abstract

The invention discloses a neurosurgery interventional therapy implantation dosing device, and belongs to the field of medical instruments, the neurosurgery interventional therapy implantation dosing device comprises an injection seat, the injection seat is provided with a first storage cavity for storing liquid medicine, the injection seat is provided with a catheter communicated with the first storage cavity, and the injection seat is fixedly provided with a first silica gel pad; the injection seat is provided with a flow guide assembly, the flow guide assembly is used for collecting tissue fluid generated by body rejection, the injection mechanism is fixed on an arm of a patient through a binding assembly, the injection mechanism is matched with the driving mechanism to add a medicament into the injection seat, and a flow guide groove in the outer wall of the injection seat guides the peripheral tissue fluid to flow. The supporting net facilitates the tissue fluid to enter the second storage cavity along the flow guide grooves, the arc-shaped plates in the second storage cavity are matched with the flow guide holes in the arc-shaped plates, the tissue fluid smoothly flows into the second storage cavity, and the structure constructs an efficient drainage path to efficiently collect the tissue fluid.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more specifically, to a neurosurgical interventional therapy implantable drug delivery device. Background Technology

[0002] In neurosurgical clinical treatment, for diseases such as intracranial tumors, chronic inflammation, and refractory epilepsy, it is often necessary to use implantable devices to precisely deliver drugs to the intracranial lesion area in order to avoid the side effects of systemic medication and ensure that the drug reaches an effective therapeutic concentration at the lesion site.

[0003] As neurosurgical treatments become more precise and minimally invasive, patients are increasingly demanding higher standards for the safety and comfort of implanted devices. Drug delivery rates and dosages must be strictly controlled to avoid intracranial pressure fluctuations caused by excessively rapid administration or insufficient dosage that could affect treatment outcomes.

[0004] In the existing technology, traditional implantable drug delivery devices mostly only have a single drug delivery function and lack a targeted design for fluid collection and treatment. The tissue fluid generated by rejection reaction needs to be treated by additional puncture and aspiration, which not only increases patient trauma and the frequency of medical visits, but may also lead to device contamination or displacement due to improper operation. Summary of the Invention

[0005] In view of the fact that existing implantable drug delivery devices mostly only have a single drug delivery function and lack a targeted design for fluid collection and treatment, the tissue fluid generated by rejection reaction needs to be treated by additional puncture and aspiration, which not only increases patient trauma and the frequency of medical visits, but may also lead to device contamination or displacement due to improper operation. The purpose of this invention is to provide a neurosurgical interventional therapy implantable drug delivery device to solve the above problems.

[0006] To solve the above problems, the present invention adopts the following technical solution:

[0007] A neurosurgical interventional therapy implantable drug delivery device includes an injection seat and an injection mechanism. The injection seat is implanted subcutaneously, and a first storage cavity for storing drug solution is opened in the injection seat. A catheter communicating with the first storage cavity is provided on the injection seat.

[0008] A flow guiding component is provided on the side wall of the injection port, and a second storage cavity is opened inside the injection port. Tissue fluid flows into the second storage cavity through the flow guiding component.

[0009] The injection mechanism is attached to the patient's arm via a binding component. The injection mechanism includes an injection needle, and a drive mechanism is installed inside the injection mechanism to drive the injection needle through the skin to add medication into the first storage cavity.

[0010] The extraction component is disposed within the injection mechanism. The extraction component includes an extraction needle, and the driving mechanism drives the extraction needle to penetrate the second storage cavity and extract tissue fluid.

[0011] Optionally, the flow guiding assembly includes flow guiding grooves, and a plurality of flow guiding grooves are formed on the side wall of the injection seat. A support mesh is installed on the flow guiding grooves. A plurality of arc-shaped plates that cooperate with the flow guiding grooves are installed in the second storage cavity. The number of arc-shaped plates is equal to the number of flow guiding grooves, and the position of each arc-shaped plate corresponds to the position of each flow guiding groove. Flow guiding holes are provided on the arc-shaped plates.

[0012] Optionally, an elastic sheet is installed on the arc-shaped plate, a connecting rod is fixedly installed on the elastic sheet, and a sealing plug that mates with the guide hole is fixedly installed on the connecting rod.

[0013] Optionally, the injection mechanism includes a mounting base, an injection cylinder is fixedly mounted in the mounting base, a first piston rod driven by a driving mechanism is slidably mounted in the injection cylinder, a first connecting tube is connected to the injection cylinder, and the injection needle is fixedly mounted at the end of the first connecting tube away from the injection cylinder.

[0014] Optionally, the drive mechanism includes an electric telescopic rod fixedly installed in the mounting base, a connecting block fixedly installed on the output end of the electric telescopic rod, a curved rod fixedly installed on the connecting block, and the first piston rod fixedly installed on the curved rod.

[0015] Optionally, the extraction assembly includes a suction cylinder fixedly installed in the mounting base, a second piston rod slidably installed in the suction cylinder, the second piston rod being fixed to a curved rod by a connecting assembly, a second connecting tube communicating with the suction cylinder, and the suction needle being fixedly installed on the second connecting tube.

[0016] Optionally, a first silicone pad is fixedly installed on the injection seat, the first silicone pad being located above the first storage cavity; a second silicone pad is fixedly installed on the injection seat, the second silicone pad being located above the second storage cavity; a first positioning ring is fixedly installed on the injection seat, the first positioning ring surrounding the second silicone pad; a second positioning ring is slidably installed on the aspiration needle; the first positioning ring and the second positioning ring are magnetic and support mutual attraction.

[0017] Optionally, the binding component includes a first strap and a second strap that are respectively fixedly installed on both sides of the mounting base, and both the first strap and the second strap are provided with Velcro.

[0018] Optionally, the connecting assembly includes a limiting groove formed on the second piston rod, a rotating block rotatably mounted on the curved rod, and a limiting magnetic block that cooperates with the limiting groove fixedly mounted on the rotating block.

[0019] Optionally, the injection port is made of acrylic material on the side closest to the skin. The catheter leads to the affected area.

[0020] Compared with the prior art, the technical solution provided by this invention has at least the following beneficial effects:

[0021] In the above scheme, by setting up a flow guiding component, the second storage chamber is a dedicated storage chamber for tissue fluid, isolated from the first storage chamber to prevent drug contamination. The flow guiding groove on the outer wall of the injection port guides the flow of surrounding tissue fluid, and the support mesh facilitates the entry of tissue fluid into the second storage chamber along the flow guiding groove. The arc-shaped plate in the second storage chamber, together with the flow guiding hole on it, allows the tissue fluid to flow smoothly into the second storage chamber. This structure creates an efficient drainage path, avoids disorderly accumulation of tissue fluid, and improves drainage efficiency.

[0022] By incorporating an elastic plate, the elastic plate on the arc-shaped plate possesses deformation recovery capability. Under normal conditions, it drives the sealing plug to block the guide hole via a connecting rod, preventing backflow of fluid in the second storage cavity. When the tissue fluid around the injection port increases, the liquid pressure in the guide groove rises, pushing the elastic plate to deform towards the second storage cavity. The connecting rod then pushes the sealing plug away from the guide hole, allowing tissue fluid to flow in. After the pressure drops, the elastic plate rebounds, and the sealing plug blocks the guide hole again. Without external control, it intelligently regulates the inflow of accumulated fluid, enhancing the sealing of the second storage cavity and reducing the risk of fluid residue and blockage. Attached Figure Description

[0023] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram showing the fit between the injection seat and the catheter of the present invention;

[0026] Figure 3 This is a schematic diagram of the flow guiding component of the present invention;

[0027] Figure 4 This is a schematic diagram illustrating the fit between the elastic sheet, connecting rod, and sealing plug of the present invention.

[0028] Figure 5 This is a schematic diagram of the injection mechanism of the present invention;

[0029] Figure 6 This is a schematic diagram showing the cooperation between the driving mechanism, the injection mechanism, and the extraction component of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of the connecting component of the present invention;

[0031] Figure 8 This is a schematic diagram showing the cooperation between the rotating block and the limiting magnetic block of the present invention.

[0032] [Figure Labels]

[0033] 10. Injection seat; 11. Catheter; 12. First silicone pad; 13. First storage cavity;

[0034] 20. Flow guiding assembly; 21. Second storage cavity; 22. Flow guiding groove; 23. Support mesh; 24. Arc-shaped plate; 25. Flow guiding hole; 26. Elastic sheet; 27. Connecting rod; 28. Sealing plug;

[0035] 30. Injection mechanism; 31. Mounting base; 32. Injection cylinder; 33. First piston rod; 34. First connecting tube; 35. Injection needle;

[0036] 40. Drive mechanism; 41. Electric telescopic rod; 42. Connecting block; 43. Curved rod;

[0037] 50. Extraction assembly; 52. Second piston rod; 53. Suction cylinder; 54. Second connecting tube; 55. Suction needle; 56. First positioning ring; 57. Second positioning ring; 58. Second silicone pad;

[0038] 60. Binding component; 61. First strap; 62. Second strap; 63. Velcro;

[0039] 70. Connecting component; 71. Limiting groove; 72. Rotating block; 73. Limiting magnetic block.

[0040] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0041] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should also be noted that, to make the embodiments more comprehensive, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some well-known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0042] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0043] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0044] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0045] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0046] like Figures 1 to 8 As shown, this embodiment of the invention provides a neurosurgical interventional drug delivery device, including an injection seat 10 and an injection mechanism 30. The injection seat 10 has a first storage cavity 13 for storing medication. A conduit 11 communicating with the first storage cavity 13 is provided on the injection seat 10. A first silicone pad 12 is fixedly installed on the injection seat 10. The injection seat 10 is the core supporting component, and its internal first storage cavity 13 stores medication. The conduit 11 connects the first storage cavity 13 with the lesion area to achieve precise delivery of medication. The first silicone pad 12 serves as a puncture sealing inlet to ensure no leakage during medication injection.

[0047] The injection port 10 is provided with a flow guiding component 20, which includes a second storage cavity 21 opened in the injection port 10. The flow guiding component 20 is used to collect tissue fluid generated by body rejection. The flow guiding component 20 collects tissue fluid generated by body rejection to avoid fluid accumulation that may cause inflammation or erosion of the device.

[0048] The injection mechanism 30 is fixed to the patient's arm by a binding component 60. The injection mechanism 30 includes a drive mechanism 40 and an extraction component 50. The injection mechanism 30 and drive mechanism 40 work together to add medication to the injection port 10. The extraction component 50 works with the injection mechanism 30 to extract fluid from the second storage cavity 21. The injection mechanism 30, fixed to the patient's arm by the binding component 60, works with the drive mechanism 40 to inject medication, replacing manual operation and avoiding uneven injection. The extraction component 50, working with the injection mechanism 30, extracts the collected fluid, maintaining the stability of the surrounding tissue environment. This integrated approach to medication administration and fluid management reduces trauma from multiple device implantations, improves medication stability and safety, and lowers the incidence of postoperative complications.

[0049] like Figures 1 to 4 As shown, a plurality of flow-guiding grooves 22 are formed on the circumferential sidewall of the injection seat 10. A support net 23 is fixedly installed on the flow-guiding groove 22, and the support net 23 covers the notch of the flow-guiding groove 22. The second storage cavity is located inside the injection seat 10 and is arranged around the first storage cavity 13. A plurality of arc-shaped plates 24 that cooperate with the flow-guiding grooves 22 are fixedly installed in the second storage cavity 21. The number of arc-shaped plates 24 is equal to the number of flow-guiding grooves 22. The position of each arc-shaped plate 24 corresponds to the position of each flow-guiding groove 22. A flow-guiding hole 25 is provided on the arc-shaped plate 24.

[0050] In the drainage assembly 20, the second storage chamber 21 is a dedicated storage chamber for tissue fluid, isolated from the first storage chamber 13 to prevent drug contamination. The drainage groove 22 on the outer wall of the injection seat 10 guides the flow of surrounding tissue fluid, and the support mesh 23 facilitates the entry of tissue fluid into the second storage chamber 21 along the drainage groove 22. The arc-shaped plate 24 in the second storage chamber 21, in conjunction with the drainage hole 25 on it, allows the tissue fluid to flow smoothly into the second storage chamber 21. This structure creates an efficient drainage path, avoids disorderly accumulation of tissue fluid, and improves drainage efficiency.

[0051] An elastic sheet 26 is fixedly mounted on the arc-shaped plate 24, and a connecting rod 27 is fixedly mounted on the elastic sheet 26. A sealing plug 28 that mates with the guide hole 25 is fixedly mounted on the other end of the connecting rod 27. The arc-shaped plate 24 blocks the opening between the guide groove 22 and the second storage cavity 21, so that after the tissue fluid enters the guide groove 22, it can only enter the second storage cavity 21 through the guide hole 25. The protruding direction of the arc-shaped plate 24 faces into the second storage cavity 21.

[0052] The elastic sheet 26 on the arc plate 24 has deformation recovery capability. Under normal conditions, it pushes the sealing plug 28 to block the guide hole 25 through the connecting rod 27 to prevent the backflow of accumulated fluid in the second storage cavity 21. The sealing plug 28 faces the inside of the second storage cavity 21. When the tissue fluid around the injection seat 10 increases, the liquid pressure in the guide groove 22 increases, pushing the elastic sheet 26 to deform towards the second storage cavity 21. The connecting rod 27 pushes the sealing plug 28 away from the guide hole 25, and the tissue fluid flows in. After the pressure drops, the elastic sheet 26 rebounds, and the sealing plug 28 blocks the guide hole 25 again. Without external control, it intelligently regulates the flow of accumulated fluid, enhances the sealing of the second storage cavity 21, and reduces the risk of fluid residue and blockage.

[0053] like Figures 1 to 6 As shown, the injection mechanism 30 includes a mounting base 31, an injection cylinder 32 is fixedly installed in the mounting base 31, a first piston rod 33 driven by a driving mechanism 40 is slidably installed in one end of the injection cylinder 32, a first connecting tube 34 is fixedly installed on the other end of the injection cylinder 32, and an injection needle 35 is fixedly installed at the end of the first connecting tube 34 away from the injection cylinder 32.

[0054] The injection port 10 is implanted subcutaneously, while the injection needle 35 is external. During injection, the needle penetrates the skin and the first silicone pad 12 sequentially, according to the position of the injection port 10, and enters the first storage cavity 13. The mounting base 31 fixes the components of the injection mechanism 30. The syringe 32 stores the medication. The first piston rod 33 slides and squeezes the medication. Before administration, the first piston rod 33 is pulled to draw in the medication. During puncture, the injection needle 35 penetrates the skin and the first silicone pad 12 to enter the first storage cavity 13.

[0055] The drive mechanism 40 drives the first piston rod 33 to slide, and the liquid medicine is injected into the first storage cavity 13 through the first connecting tube 34 and the injection needle 35, and then delivered to the affected area through the catheter 11. The syringe 32 and the first piston rod 33 work together to realize the quantitative delivery of the liquid medicine. The self-healing property of the first silicone pad 12 can reduce the risk of puncture displacement and needle leakage, and ensure the precise drug delivery needs of neurosurgery.

[0056] The drive mechanism 40 includes an electric telescopic rod 41 fixedly installed in the mounting base 31. A connecting block 42 is fixedly installed on the output end of the electric telescopic rod 41. A curved rod 43 is fixedly installed on the connecting block 42. The first piston rod 33 is fixedly installed on the curved rod 43.

[0057] The electric telescopic rod 41 is fixed to the mounting base 31 to provide stable power for injection. After setting the extension rate and stroke of the electric telescopic rod 41, it is started. The output end drives the connecting block 42 and the curved rod 43 to move. The curved rod 43 converts the linear motion into the sliding of the first piston rod 33 along the axis of the syringe 32, pushing the liquid medicine to be injected at a uniform speed. The electric telescopic rod 41 replaces manual injection, avoiding fluctuations in force and rate. The curved rod 43 optimizes the spatial layout, making the device compact and lightweight, adaptable to different doses and types of liquid medicine, and improving the versatility and safety of drug administration.

[0058] The extraction assembly 50 includes a suction cylinder 53 fixedly installed in the mounting base 31. A second piston rod 52 is slidably installed inside the suction cylinder 53. The second piston rod 52 is fixed to a curved rod 43 via a connecting assembly 70. A second connecting tube 54 is fixedly installed on the suction cylinder 53, and a suction needle 55 is fixedly installed on the second connecting tube 54. A second silicone pad 58 is provided on the injection seat 10. The second silicone pad 58 is located above the second storage cavity 21, and can penetrate the second silicone pad 58 to enter the second storage cavity 21.

[0059] The suction cylinder 53 is fixed to the mounting base 31. The second piston rod 52 slides to generate negative pressure. During extraction, the suction needle 55 penetrates the second silicone pad 58 and enters the second storage cavity 21. The drive mechanism 40 drives the second piston rod 52 to slide through the curved rod 43 and the connecting assembly 70, generating negative pressure inside the suction cylinder 53. Tissue fluid is drawn in through the suction needle 55 and the second connecting tube 54. The large opening design of the suction needle 55 is suitable for viscous fluid and avoids blockage. It shares the drive with the injection mechanism 30, requiring no additional power, simplifying the structure, reducing the volume, ensuring thorough fluid extraction, and reducing the risk of inflammation and infection.

[0060] A first positioning ring 56 is fixedly installed on the injection seat 10, and the first positioning ring 56 surrounds the second silicone pad 58. A second positioning ring 57 is slidably installed on the aspiration needle 55. The first positioning ring 56 and the second positioning ring 57 are magnetic and can attract each other.

[0061] The first positioning ring 56 on the injection seat 10 surrounds the second silicone pad 58. The second positioning ring 57 on the aspiration needle 55 is attracted to the first positioning ring 56 by opposite poles. When aspiration is performed, the aspiration needle 55 is brought close to the injection seat 10 area. The second positioning ring 57 is attracted by the magnetic field of the first positioning ring 56, which drives the aspiration needle 55 to automatically align with the center of the second silicone pad 58, assisting in precise puncture. No imaging equipment is required for positioning, reducing the difficulty and cost of operation and avoiding device damage caused by puncture deviation.

[0062] The binding component 60 includes a first strap 61 fixedly installed at the bottom of the mounting base 31, and a second strap 62 fixedly installed on the mounting base 31. Both the first strap 61 and the second strap 62 are provided with Velcro 63.

[0063] The first strap 61 and the second strap 62 are respectively fixed to both sides of the mounting base 31. Both are made of elastic medical fabric. When fixing, the mounting base 31 is placed against the arm, the first strap 61 and the second strap 62 are wrapped around the arm once, and the Velcro 63 is used to fix it. The tightness can be adjusted according to the thickness of the arm. When removing, the Velcro 63 can be peeled off. The elastic fabric ensures wearing comfort and breathability, and the Velcro 63 enables quick fixing and removal. Patients can operate independently, which is suitable for home treatment. At the same time, it ensures the stability of the mounting base 31 and avoids displacement during drug administration or aspiration, which may affect the puncture accuracy.

[0064] like Figures 1 to 8 As shown, the connecting assembly 70 includes a limiting groove 71 formed on the second piston rod 52, a rotating block 72 rotatably mounted on the curved rod 43, and a limiting magnetic block 73 that cooperates with the limiting groove 71 is fixedly mounted on the rotating block 72.

[0065] The second piston rod 52 has a limiting groove 71 at its end. The rotating block 72 on the curved rod 43 can rotate around the pivot. The limiting magnetic block 73 on the rotating block 72 matches the limiting groove 71 and is magnetically attracted. When synchronous driving extraction is required, the rotating block 72 is rotated to make the limiting magnetic block 73 embed into the limiting groove 71, and the curved rod 43 drives the second piston rod 52 to move. When injection is only needed, the rotating block 72 is rotated in the opposite direction, the limiting magnetic block 73 disengages from the limiting groove 71, and the second piston rod 52 stops. This allows for flexible switching between injection and extraction modes without tools, making operation convenient. The magnetic fit ensures a firm connection, extends the service life of the components, and adapts to different clinical needs.

[0066] The injection port 10 is made of acrylic material on the side closest to the skin. This material has high light transmittance, good biocompatibility, and is resistant to corrosion from body fluids. During observation, under sufficient light conditions, the level of the accumulated fluid or abnormal sediment in the second storage cavity 21 can be clearly seen through the acrylic area on the body surface, allowing for the determination of the amount and state of the accumulated fluid. After long-term implantation, the acrylic material does not degrade, its light transmittance does not decrease, and it does not cause serious rejection, enabling non-invasive visual observation, reducing the number of medical examinations and costs, ensuring safety in use, meeting the strict requirements for neurosurgical implantable devices, and improving the convenience of home treatment for patients.

[0067] Preferably, the curved rod 43 can be an inverted S-shaped rod, so that the second piston rod 52 and the first piston rod 33 are arranged in parallel and in opposite directions.

[0068] The specific workflow of the technical solution provided by this invention is as follows:

[0069] According to the location of the lesion, the doctor implants the injection port 10 under the skin. One end of the catheter 11 is connected to the first storage cavity 13, and the other end extends to the lesion area. After fixation, ensure that the first silicone pad 12 and the second silicone pad 58 are facing upwards, and the acrylic area is facing the body surface.

[0070] The patient secures the mounting base 31 to their arm using the binding component 60, separates the second piston rod 52 from the curved rod 43, and injects medication into the syringe 32; the injection needle 35 punctures the first silicone pad 12 and enters the first storage cavity 13, activates the electric telescopic rod 41, and pushes the first piston rod 33 through the curved rod 43, delivering the medication to the affected area via the catheter 11; after medication administration, the components are reset, the needle is removed, and the mounting base 31 is disassembled.

[0071] The tissue fluid generated by rejection flows along the guide groove 22, and the pressure pushes the elastic sheet 26 to open the guide hole 25, flowing into the second storage cavity 21; the amount of accumulated fluid is observed through the acrylic area, and when it needs to be extracted, the second piston rod 52 and the curved rod 43 are connected, and the magnetic positioning is used to make the suction needle 55 pierce the second silicone pad 58. The electric telescopic rod 41 drives the second piston rod 52 to extract the accumulated fluid under negative pressure; after extraction, the accumulated fluid is discharged and the components are reset.

[0072] The fluid accumulation status is monitored regularly through the acrylic area, and the injection and aspiration modes are switched as needed. When the device reaches the end of its lifespan or after treatment, the injection port 10 and catheter 11 are removed by minimally invasive surgery. The whole process achieves precise drug delivery and fluid accumulation management in one, ensuring safety and convenience, and conforming to the principles of minimally invasive neurosurgical treatment.

[0073] By utilizing the light transmittance of acrylic, the semi-transparent properties of human skin (superficial layer), and the optical contrast of the effusion, the state of the effusion can be monitored through the acrylic area. First, acrylic material has good light transmittance and biocompatibility. At the same time, it is implanted relatively shallowly and has a certain degree of "semi-transparency" under natural light or light source, allowing light to penetrate the skin, acrylic, and second storage cavity 21. The second storage cavity 21 is "colorless and transparent," while the effusion is usually "pale yellow / turbid," forming a clear difference in color and light transmittance with the cavity wall. Therefore, through the skin and acrylic, changes in the liquid level or turbid areas in the cavity can be observed, thereby determining the amount of effusion.

[0074] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0075] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A neurosurgical interventional therapy implantable drug delivery device, characterized in that, The device includes an injection port and an injection mechanism. The injection port is implanted subcutaneously, and a first storage cavity for storing medication is provided inside the injection port. A catheter communicating with the first storage cavity is provided on the injection port. A flow guiding component is provided on the side wall of the injection port, and a second storage cavity is opened inside the injection port. Tissue fluid flows into the second storage cavity through the flow guiding component. The injection mechanism is attached to the patient's arm via a binding component. The injection mechanism includes an injection needle, and a drive mechanism is installed inside the injection mechanism to drive the injection needle through the skin to add medication into the first storage cavity. The extraction component is disposed within the injection mechanism. The extraction component includes an extraction needle, and the driving mechanism drives the extraction needle to penetrate the second storage cavity and extract tissue fluid.

2. The neurosurgical interventional drug delivery device according to claim 1, characterized in that, The flow guiding assembly includes flow guiding grooves. Several flow guiding grooves are formed on the side wall of the injection seat. A support mesh is installed on the flow guiding grooves. Several arc-shaped plates that cooperate with the flow guiding grooves are installed in the second storage cavity. The number of arc-shaped plates is equal to the number of flow guiding grooves, and the position of each arc-shaped plate corresponds to the position of each flow guiding groove. Flow guiding holes are provided on the arc-shaped plates.

3. The neurosurgical interventional drug delivery device according to claim 2, characterized in that, An elastic sheet is installed on the arc-shaped plate, a connecting rod is fixedly installed on the elastic sheet, and a sealing plug that mates with the guide hole is fixedly installed on the connecting rod.

4. The neurosurgical interventional drug delivery device according to claim 3, characterized in that, The injection mechanism includes a mounting base, an injection cylinder is fixedly installed in the mounting base, a first piston rod driven by a driving mechanism is slidably installed in the injection cylinder, a first connecting tube is connected to the injection cylinder, and the injection needle is fixedly installed at the end of the first connecting tube away from the injection cylinder.

5. The neurosurgical interventional drug delivery device according to claim 4, characterized in that, The drive mechanism includes an electric telescopic rod fixedly installed in the mounting base, a connecting block fixedly installed on the output end of the electric telescopic rod, a curved rod fixedly installed on the connecting block, and the first piston rod fixedly installed on the curved rod.

6. The neurosurgical interventional drug delivery device according to claim 5, characterized in that, The extraction assembly includes a suction cylinder fixedly installed in a mounting base, a second piston rod slidably installed inside the suction cylinder, the second piston rod being fixed to a curved rod via a connecting assembly, a second connecting tube communicating with the suction cylinder, and the suction needle being fixedly installed on the second connecting tube.

7. The neurosurgical interventional drug delivery device according to claim 6, characterized in that, A first silicone pad is fixedly installed on the injection seat, and the first silicone pad is located above the first storage cavity; a second silicone pad is fixedly installed on the injection seat, and the second silicone pad is located above the second storage cavity; a first positioning ring is fixedly installed on the injection seat, and the first positioning ring surrounds the second silicone pad; a second positioning ring is slidably installed on the aspiration needle; the first positioning ring and the second positioning ring are magnetic and support mutual attraction.

8. The neurosurgical interventional drug delivery device according to claim 7, characterized in that, The binding component includes a first strap and a second strap, which are respectively fixedly installed on both sides of the mounting base, and both the first strap and the second strap are provided with Velcro.

9. The neurosurgical interventional drug delivery device according to claim 8, characterized in that, The connecting assembly includes a limiting groove formed on the second piston rod, a rotating block rotatably mounted on the curved rod, and a limiting magnetic block that cooperates with the limiting groove fixedly mounted on the rotating block.

10. The neurosurgical interventional drug delivery device according to claim 1, characterized in that, The injection port is made of acrylic material on the side closest to the skin; the catheter leads to the affected area.

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