Drainage and medicine injection device
By introducing a curved clip into the drainage and injection device, the problem of bending and occlusion of the drainage tube due to skull compression is solved, and the safety and reliability of the device are improved.
Patent Information
- Application Number
- CN202421705696.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-18
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-07-18
AI Technical Summary
In the existing drainage and injection devices of cerebrospinal fluid reservoirs, the drainage tube is prone to bend due to the skull compression, resulting in occlusion of the pipe.
A drainage and drug injection device including a liquid reservoir, a drainage tube and a curved clip is designed. The arc clamp divides the drainage tube into two sections through the arc-shaped part, and the clamping part clamps any section, so that the drainage tube smoothly transitions along the arc and reduces the risk of bending.
It effectively enhances the bending resistance of the drainage tube, reduces the risk of pipe occlusion caused by bending, and improves the safety of the device.
Smart Images
Figure CN223041904U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of medical devices, and particularly to a drainage and drug injection device. Background Art
[0002] A cerebrospinal fluid reservoir is a device placed subcutaneously and implanted into the cranial cavity through a craniotomy to provide an accessible pathway to the lateral ventricle, subarachnoid space, and removal of the residual cavity of the main tumor. Through this pathway, a series of functions can be achieved, specifically such as the drainage function: temporarily storing and draining cerebrospinal fluid outside the skull, obtaining samples for cytological and chemical research, and regulating the pressure of ventricular fluid; and the drug injection function: repeatedly puncturing to inject antibiotics, stem cells, chemotherapy drugs, and / or radioactive isotopes into the cranial cavity.
[0003] In the prior art, the drainage and drug injection device including a cerebrospinal fluid reservoir often drains or injects liquid through a drainage tube. The drainage tube mostly uses elastic or flexible materials and is prone to bending when subjected to external forces. For example, after the drainage tube extends into the cranial cavity, due to the special shape of the cranial cavity, the drainage tube is easily bent by the extrusion of the skull, and due to the nature of the material of the drainage tube, it is prone to folding after bending, thereby causing the occlusion of the drainage tube.
[0004] Therefore, there is a need for a solution to solve the above problems. Utility Model Content
[0005] In view of the deficiencies in the prior art, this application provides a drainage and drug injection device.
[0006] The technical solution adopted by this application to solve the above technical problems is as follows:
[0007] A drainage and drug injection device, comprising: a reservoir, a drainage tube, and a curvature clip;
[0008] A liquid storage space is formed in the reservoir, and a liquid outlet nozzle communicating with the liquid storage space and the drainage tube is provided on the reservoir;
[0009] A socket part for connecting the drainage tube is provided on the curvature clip. An arc part is connected in the axial direction of the socket part, and the other end of the arc part is connected with a clamping part that fits the shape of the drainage tube. The clamping part extends in the radial direction of the socket part;
[0010] The curvature clip is sleeved on the drainage tube. The curvature clip divides the drainage tube into a first section and a second section. The clamping part clamps either the first section or the second section, so that the transition between the first section and the second section is smooth along the curvature of the arc part.
[0011] In a specific embodiment, the cross-sectional shape of the clamping portion includes an arc shape, and the radian angle of the clamping portion gradually increases along the extending direction.
[0012] In a specific embodiment, the radian angle of the clamping portion is between 80 degrees and 260 degrees.
[0013] In a specific embodiment, wing-shaped fixing portions are extended on both sides of the clamping portion, and the fixing portions are used to fix the radian clip under the skin.
[0014] In a specific embodiment, a liquid outlet hole is provided at one end of the drainage tube far from the liquid storage sac, and the liquid outlet holes include a plurality of them and are distributed along the circumferential direction of the drainage tube to form a liquid outlet hole array of M×N, where both M and N are integers not less than 2.
[0015] In a specific embodiment, a conical structure is further provided at one end of the drainage tube close to the liquid outlet hole.
[0016] In a specific embodiment, the liquid storage sac includes a base and a housing, the base is placed in the housing to form the liquid storage space, and the liquid outlet nozzle extends out of the housing and is detachably connected to the drainage tube;
[0017] The housing includes an elastic silicone housing, the base includes a rigid polypropylene base, and the drainage tube includes an elastic silicone drainage tube.
[0018] In a specific embodiment, a sealing assembly is further provided;
[0019] The sealing assembly includes a sealing ring and a tightening ring; the sealing ring and the tightening ring are sequentially arranged at the connection between the liquid outlet nozzle and the housing.
[0020] In a specific embodiment, a reinforcing mesh for enhancing the structural strength of the liquid storage sac is further provided in the housing.
[0021] In a specific embodiment, a guiding needle for guiding the drainage tube is further provided.
[0022] Beneficial effects:
[0023] The present application provides a drainage and drug injection device, which enhances the anti-bending ability of the drainage tube, and thus can, to a certain extent, avoid the occlusion of the drainage tube caused by bending and folding; specifically, a radian clip is provided on the drainage tube so that the drainage tube can make a smooth transition along the radian of the arc portion, reducing the risk of bending and occlusion of the drainage tube and improving the use safety of the drainage and drug injection device. Description of the drawings
[0024] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.
[0025] Figure 1 Isometric view of the drainage and drug injection device combination for this embodiment;
[0026] Figure 2 Cross-sectional view of the drainage and drug injection device for this embodiment;
[0027] Figure 3 Exploded view of the liquid injection sac for this embodiment;
[0028] Figure 4 Enlarged view of the structural details of the drainage tube for this embodiment;
[0029] Figure 5 Isometric view of the arc clamp for this embodiment;
[0030] Figure 6 Connection state of the arc clamp and the drainage tube for this embodiment Figure 1 ;
[0031] Figure 7 Connection state of the arc clamp and the drainage tube for this embodiment Figure 2 ;
[0032] Figure 8 Isometric view of the guiding needle for this embodiment.
[0033] Reference numerals:
[0034] 1 - liquid storage sac; 11 - outer shell; 12 - base; 13 - liquid outlet nozzle; 14 - reinforcing mesh; 15 - liquid storage space; 2 - drainage tube; 21 - first section; 22 - second section; 23 - liquid outlet hole; 24 - liquid outlet hole array; 25 - conical structure; 3 - arc clamp; 31 - socket part; 32 - arc part; 33 - clamping part; 34 - fixing part; 4 - sealing component; 41 - sealing ring; 42 - tightening ring; 5 - guiding needle. Detailed implementation manners
[0035] In the following, various embodiments of the present disclosure will be described more comprehensively. The present disclosure can have various embodiments, and adjustments and changes can be made therein. However, it should be understood that there is no intention to limit the various embodiments of the present disclosure to the specific embodiments disclosed herein, but the present disclosure should be understood to cover all adjustments, equivalents, and / or alternative solutions falling within the spirit and scope of the various embodiments of the present disclosure.
[0036] Hereinafter, the term "comprising" or "may comprise" that may be used in various embodiments of the present disclosure indicates the presence of the disclosed functions, operations, or elements, and does not limit the addition of one or more functions, operations, or elements. Further, as used in various embodiments of the present disclosure, the terms "comprising", "having", and their cognates are only intended to indicate a specific feature, number, step, operation, element, component, or combination of the foregoing items, and should not be construed as precluding the existence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing items first.
[0037] In various embodiments of the present disclosure, the expression "or" or "at least one of A or / and B" includes any combination or all combinations of the listed words at the same time. For example, the expression "A or B" or "at least one of A or / and B" may include A, may include B, or may include both A and B.
[0038] Expressions (such as "first", "second", etc.) used in various embodiments of the present disclosure may modify various constituent elements in the various embodiments, but do not limit the corresponding constituent elements. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are only for the purpose of distinguishing one element from other elements. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, without departing from the scope of the various embodiments of the present disclosure, the first element may be referred to as the second element, and similarly, the second element may also be referred to as the first element.
[0039] It should be noted that: if it is described that one constituent element is "connected" to another constituent element, the first constituent element may be directly connected to the second constituent element, and a third constituent element may be "connected" between the first constituent element and the second constituent element. On the contrary, when one constituent element is "directly connected" to another constituent element, it can be understood that there is no third constituent element between the first constituent element and the second constituent element.
[0040] The term "user" used in various embodiments of the present disclosure may indicate a person who uses an electronic device or a device that uses an electronic device (for example, an artificial intelligence electronic device).
[0041] The terms used in various embodiments of the present disclosure are for the purpose of describing specific embodiments only and are not intended to limit the various embodiments of the present disclosure. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the present disclosure pertain. The terms (such as those defined in a commonly used dictionary) will be interpreted as having the same meaning as the contextual meaning in the relevant technical field and will not be interpreted as having an idealized meaning or an overly formal meaning, unless clearly defined in the various embodiments of the present disclosure.
[0042] Embodiment
[0043] An embodiment of the present application provides a drainage and drug injection device, as Figures 1 to 7 shown, including: a liquid storage bladder 1, a drainage tube 2, and a curvature clip 3; wherein, Figure 1 The broken line indicates the omission of the length of the drainage tube 2.
[0044] A liquid storage space 15 is formed in the liquid storage bladder 1, and a liquid outlet nozzle 13 communicating with the liquid storage space 15 and the drainage tube 2 respectively is provided on the liquid storage bladder 1;
[0045] Specifically, in some embodiments of the present application, the liquid storage space 15 can be used for the injection and storage of liquid medicine. A liquid outlet nozzle 13 extending out of the liquid storage bladder 1 is provided on the liquid storage bladder 1. One end of the liquid outlet nozzle 13 communicates with the liquid storage space 15, and the other end of the liquid outlet nozzle 13 communicates with the drainage tube 2, forming a liquid medicine flow path from the liquid storage bladder 1 to the specific affected part of the patient.
[0046] Of course, the above is only the relevant description when the drainage and drug injection device functions as a drug injection device. The description when it functions as a drainage device can be known by the same token.
[0047] A socket part 31 for connecting the drainage tube 2 is provided on the curvature clip 3. An arc part 32 is connected in the axial direction of the socket part 31. The other end of the arc part 32 is connected with a clamping part 33 that fits the shape of the drainage tube 2, and the clamping part 33 extends in the radial direction of the socket part 31;
[0048] It can be understood that with the above structural arrangement, an angle is formed between the socket part 31 and the clamping part 33. More specifically, the socket part 31 and the clamping part 33 are connected through the arc part 32, and the arc part 32 can effectively disperse the stress at the connection point, helping to avoid stress concentration;
[0049] In addition, through the curve design of the arc portion 32, an arc angle can be formed between the socket portion 31 and the clamping portion 33, which helps to achieve a soft and smooth transition between the socket portion 31 and the clamping portion 33.
[0050] Specifically, as Figure 6 shown, a curvature clip 3 is sleeved on the drainage tube 2. The curvature clip 3 divides the drainage tube 2 into a first section 21 and a second section 22. The clamping portion 33 clamps either the first section 21 or the second section 22, so that the first section 21 and the second section 22 smoothly transition along the curvature of the arc portion 32, making it difficult for the drainage tube 2 to bend.
[0051] The setting of the curvature clip 3 can effectively avoid the occlusion of the drainage tube 2;
[0052] It can be understood that when the drainage and drug injection device is in use, the drainage tube 2 needs to penetrate deep into the skull. Due to the limitations of the intracranial shape, the shape of the skull, or the shape of the affected area, the drainage tube 2 often needs to be bent. Since the drainage tube 2 is mostly made of flexible material, the folded part is prone to folding, resulting in the occlusion of the drainage tube 2. However, due to the setting of the curvature clip 3, the drainage tube 2 can be shaped according to the pre-defined arc shape through the arc portion 32, achieving a soft transition between the first section 21 and the second section 22 of the drainage tube 2. Therefore, it can effectively avoid the compression of the skull shape on the drainage tube 2, and further effectively avoid the bending of the drainage tube 2. Since the drainage tube 2 is not prone to bending, it can naturally avoid the occlusion of the folded part of the drainage tube 2 due to bending, thus improving the safety performance of the drainage and drug injection device.
[0053] Furthermore, the cross-sectional shape of the clamping portion 33 includes a circular arc, and the radian angle of the clamping portion 33 gradually increases along the extension direction.
[0054] The design of the circular arc cross-section of the clamping portion 33 helps to evenly distribute stress, reduce stress concentration, and thus improve the durability and reliability of the clamping portion 33; the setting of the circular arc cross-section of the clamping portion 33 also helps to improve the shape fit with the drainage tube 2, and then facilitates the good connection between the drainage tube 2 and the clamping portion 33;
[0055] When the clamping portion 33 is connected to the drainage tube 2, since the farther the clamping portion 33 extends outward, the greater the reaction force from the drainage tube 2 and the worse the connection stability with the drainage tube 2. Correspondingly, the radian angle of the clamping portion 33 gradually increases along the extension direction, which helps to correspondingly enhance the clamping force of different parts of the clamping portion 33, so that the drainage tube 2 can be stably arranged in the clamping portion 33, enhancing the connection stability and reliability between the clamping portion 33 and the drainage tube 2.
[0056] Specifically, gradually increasing the radian angle can increase the surface contact area of the clamping part 33 during connection. The contact area of the clamping part 33 increases, thereby improving the tightness and firmness of the connection with the drainage tube 2, making the clamping part 33 more resistant to the action of force.
[0057] Furthermore, the radian angle of the clamping part 33 is between 80 degrees and 260 degrees.
[0058] Setting the radian angle of the clamping part 33 within the range of 80 degrees to 260 degrees helps to more evenly distribute the stress at the connection, can reduce the stress concentration of the clamping part 33, and improves the connection strength.
[0059] On the one hand, within this radian angle range, the contact area between the clamping part 33 and the drainage tube 2 is relatively large, thereby improving the stability and firmness of the connection. On the other hand, the correctly designed radian angle range can reduce the possible damage or wear caused during the process of setting the drainage tube 2 into the clamping part 33, and at the same time, it is also convenient for the actual use of the radian clip 3, optimizing the use experience of doctors and patients.
[0060] Preferably, the radian angle of the clamping part 33 is between 90 degrees and 255 degrees.
[0061] Furthermore, as Figures 5 to 7 shown, wing-shaped fixing parts 34 extend on both sides of the clamping part 33, and the fixing parts 34 are used to fix the radian clip 3 under the skin.
[0062] The wing-shaped fixing parts 34 can provide a larger contact area, effectively increasing the connection area between the radian clip 3 and under the skin, can enhance the stability and firmness of the fixation, and reduce the risk of movement or detachment.
[0063] By evenly fixing the clamping part 33 under the skin through the wing-shaped fixing parts 34, it is also possible to reduce the concentrated pressure points and reduce the possible cortical damage or discomfort.
[0064] The design of the wing-shaped fixing parts 34 can also better adapt to the shape and curve under the skin, reduce the interference and pressure on brain tissues, and improve the comfort and use adaptability of patients.
[0065] Furthermore, as Figure 4 shown, a liquid outlet hole 23 is provided at one end of the drainage tube 2 far away from the liquid storage sac 1. The liquid outlet holes 23 include a plurality of them and are distributed along the circumferential direction of the drainage tube 2 to form a liquid outlet hole array 24 of M×N, where both M and N are integers not less than 2.
[0066] The circumferential distribution of multiple liquid outlet holes 23 along the drainage tube 2 allows the liquid to flow out of the drainage tube 2 more evenly, helping to avoid excessive flow rate differences of the liquid in the drainage tube 2 and reducing the resulting liquid blockage or uneven drainage problems; draining through the liquid outlet hole array 24 composed of multiple liquid outlet holes 23 can also disperse the pressure and resistance of the liquid, helping to reduce the pressure accumulation inside the drainage tube 2 and reducing the possible damage or pressure increase to the structures of the liquid storage sac 1 and the drainage tube 2.
[0067] Furthermore, as Figure 4 shown, a conical structure 25 is also provided at one end of the drainage tube 2 close to the liquid outlet hole 23.
[0068] The conical structure 25 can effectively guide and gather the fluid to the liquid outlet hole 23, helping to improve the efficiency and speed of the liquid flowing out of the drainage tube 2. The conical structure 25 can reduce the liquid retention around the liquid outlet hole 23; by guiding the fluid to flow more effectively towards the liquid outlet hole 23, the amount of residual liquid in the pipeline can be reduced, enabling the liquid to be completely drained out.
[0069] In addition, the setting of the conical structure 25 also helps the movement of the drainage tube 2 in the skull, and the use process of the drainage tube 2 often involves steps of penetrating deep into the skull. The conical structure 25 has a direction guiding function, enabling the movement of the drainage tube 2 to be precisely and effectively controlled.
[0070] Specifically, in some embodiments of the present application, the liquid storage sac 1 includes a base 12 and a housing 11. The base 12 is placed in the housing 11 to form a liquid storage space 15. The drainage tube 2 is detachably connected to the liquid outlet nozzle 13, thereby realizing communication with the liquid storage space 15;
[0071] The medicinal liquid in the liquid storage sac 1 can reach the preset affected area through the drainage tube 2. When puncturing and injecting the medicinal liquid, since the base 12 is provided inside the liquid storage space 15, the tip of the injection needle passes through the housing 11 and enters the liquid storage space 15. If the injection needle continues to penetrate, it will pierce on the base 12 and be blocked by the base 12, preventing the tip from continuing to probe downward and avoiding the tip from penetrating the housing 11 and stabbing into the patient's head, thus achieving the purpose of protecting the patient.
[0072] More specifically, the housing 11 includes an elastic silicone housing 11, the base 12 includes a rigid polypropylene base 12, and the drainage tube 2 includes an elastic silicone drainage tube 2.
[0073] When the puncture and injection of the medicinal liquid are completed, since the housing 11 is an elastic silicone housing 11, the punctured hole can be quickly closed, achieving a good airtight effect inside the liquid storage sac 1; while the base 12 is a rigid polypropylene base 12, which can perform the above-mentioned function of blocking the tip from probing downward well, helping to protect the patient; it can also provide a better morphological support effect for the liquid storage sac 1.
[0074] If the drainage tube 2 is an elastic silicone drainage tube 2, it can more effectively adapt to the complex intracranial spatial morphology and achieve stable transportation of the liquid medicine.
[0075] Preferably, a barium sulfate coating is further provided on the surface of the drainage tube 2; the barium sulfate coating enhances the visibility of the drainage tube 2, making the drainage tube 2 more significantly visible in X-ray or other imaging examinations. Barium sulfate is a contrast agent with a high density, which can effectively enhance the pipeline contour under X-ray fluoroscopy and help doctors accurately observe the position and direction of the drainage tube 2.
[0076] Exemplarily, in the case of interventional operations or when precise positioning of the drainage tube 2 is required, the barium sulfate coating can help doctors more accurately guide the drainage tube 2 to the target position, reducing operation errors and the number of adjustments.
[0077] Furthermore, as Figure 3 shown, a sealing assembly 4 is also provided; the sealing assembly 4 includes a sealing ring 41 and a tightening ring 42;
[0078] The sealing ring 41 and the tightening ring 42 are sequentially arranged at the connection between the liquid outlet nozzle 13 and the outer shell 11.
[0079] The setting of the sealing ring 41 and the tightening ring 42 can effectively prevent liquid from leaking at the connection. By setting the sealing ring 41 and the tightening ring 42 between the liquid outlet nozzle 13 and the outer shell 11, the connection can be effectively made completely sealed, preventing the liquid medicine from leaking during use, thereby maintaining the safety performance of the drainage and injection device; furthermore, the liquid medicine can be stably and precisely delivered to the affected area, better exerting the effect of the liquid medicine and obtaining good treatment effects.
[0080] Furthermore, as Figure 3 shown, a reinforcing mesh 14 for strengthening the structural strength of the liquid storage sac 1 is also provided in the outer shell 11.
[0081] The reinforcing mesh 14 can effectively enhance the structural strength of the liquid storage sac 1, enabling it to withstand greater pressure and load. The presence of the reinforcing mesh 14 can also effectively prevent the liquid storage sac 1 from deforming or breaking during use, especially when under external forces, such as during liquid medicine puncture injection, it can also maintain the structural stability. The strengthened structure of the liquid storage sac 1 can reduce the occurrence of leakage or other safety problems caused by accidental situations, protecting the liquid or substances in the liquid storage sac 1 from leaking easily; at the same time, maintaining the morphological stability of the liquid storage sac 1 also helps to optimize the injection effect of the liquid medicine, making the flow process of the liquid medicine relatively stable.
[0082] Furthermore, as Figure 8 shown, a guiding needle 5 for guiding the drainage tube 2 is also provided.
[0083] The guiding needle 5 can accurately guide the drainage tube 2 to the required position, achieving the precision and accuracy of the operation. Especially in the complex intracranial space, the use of the guiding needle 5 can reduce the risk of damage to the surrounding tissues or blood vessels during the guiding process. Moreover, the guiding needle 5 is usually designed with a round head or a round tip, enabling it to smoothly pass through tissues or blood vessels and avoid traumatic injuries.
[0084] The embodiments of the present application at least have the following beneficial effects:
[0085] The embodiments of the present application provide a drainage and drug injection device, which enhances the anti-bending ability of the drainage tube 2, and thus can, to a certain extent, avoid the occlusion of the drainage tube 2 caused by bending. Specifically, a curvature clip 3 is provided on the drainage tube 2, so that the drainage tube 2 can smoothly transition along the curvature of the arc portion 32, reducing the risk of bending and occlusion of the drainage tube 2, and improving the use safety of the cerebrospinal fluid drainage and drug injection device of the liquid storage sac 1.
[0086] Those skilled in the art can understand that the modules in the device in the implementation scenario can be distributed in the device in the implementation scenario according to the description of the implementation scenario, or can be correspondingly changed and located in one or more devices different from this implementation scenario. The modules in the above implementation scenario can be combined into one module, or further split into multiple sub-modules.
[0087] The above serial numbers of the present application are only for description and do not represent the advantages or disadvantages of the implementation scenario.
[0088] The above discloses only several specific implementation scenarios of the present application. However, the present application is not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present application.
Claims
1. A drainage and drug injection device, characterized in that: include: Reservoir, drainage tube and arc clamp; A liquid storage space is formed in the liquid storage bag, and a liquid outlet nozzle is provided on the liquid storage bag, which is connected with the liquid storage space and the drainage tube respectively; The arc clamp is provided with a sleeve portion for connecting the drainage tube, the sleeve portion is connected with an arc portion in the axial direction, the other end of the arc portion is connected with a clamping portion that matches the shape of the drainage tube, and the clamping portion extends in the radial direction of the sleeve portion; The arc clamp is sleeved on the drainage tube, and the arc clamp separates the drainage tube into a first section and a second section. The clamping part clamps either the first section or the second section to make a smooth transition between the first section and the second section along the curvature of the arc-shaped part.
2. A drainage and drug injection device according to claim 1, characterized in that: The cross-sectional shape of the clamping portion includes an arc shape, and the arc angle of the clamping portion gradually increases along the extending direction.
3. A drainage and drug injection device according to claim 2, characterized in that: The arc angle of the clamping portion is between 80 degrees and 260 degrees.
4. A drainage and drug injection device according to claim 1, characterized in that: Wing-shaped fixing parts are extended on both sides of the clamping part, and the fixing parts are used to fix the arc clamp under the skin.
5. A drainage and drug injection device according to claim 1, characterized in that: The drainage tube is provided with a liquid outlet hole at one end away from the liquid storage bag. The liquid outlet holes include a plurality of holes and are distributed along the circumference of the drainage tube to form an M×N liquid outlet hole array, wherein M and N are both integers not less than 2.
6. A drainage and drug injection device according to claim 5, characterized in that: One end of the drainage tube close to the liquid outlet is also provided with a cone structure.
7. A drainage and drug injection device according to any one of claims 1 to 6, characterized in that: The liquid storage bag comprises a base and a shell, wherein the base is placed in the shell to form the liquid storage space, and the liquid outlet extends out of the shell and is detachably connected to the drainage tube; The shell comprises an elastic silicone shell, the base comprises a hard polypropylene base, and the drainage tube comprises an elastic silicone drainage tube.
8. A drainage and drug injection device according to claim 7, characterized in that: A sealing assembly is also provided; The sealing assembly comprises a sealing ring and a tightening ring; the sealing ring and the tightening ring are sequentially arranged at the connection between the liquid outlet nozzle and the shell.
9. A drainage and drug injection device according to claim 7, characterized in that: The shell is also provided with a reinforcing net for reinforcing the structural strength of the liquid storage bag.
10. A drainage and drug injection device according to claim 1, characterized in that: A guide needle is also provided for guiding the drainage tube.