Craniocerebral external drainage device

Abstract

The invention relates to a craniocerebral external drainage device which comprises a drainage catheter, a sampling and dosing assembly and a collecting assembly. The drainage catheter is used for stretching into target effusion. The sampling and dosing assembly comprises a sampling and dosing pipeline and a sealing connector, the sampling and dosing pipeline is at least provided with a first pipe opening, a second pipe opening and a third pipe opening, the first pipe opening is communicated with the end, away from target effusion, of the drainage catheter, and the third pipe opening is connected with the sealing connector. The collecting assembly is communicated with the second pipe opening. The hydrops in the brain of the patient can be drained into the collecting device through the first pipe opening and the second pipe opening. The third pipe orifice of the sampling and dosing pipeline is connected with the closed joint, when sampling and dosing operation is needed, the three-way joint does not need to be rotated, sampling and dosing can be directly carried out from the third pipe orifice, operation is convenient, and the infection risk caused by frequent rotation of the three-way joint is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to an external cranial drainage device. Background Art

[0002] In minimally invasive surgery for cerebral hemorrhage and cerebral effusion, a drainage tube needs to be placed into the hematoma cavity or effusion cavity and connected to an extracorporeal drainage system to form a drainage system to drain out the target fluid. During the drainage process, the patient's drained fluid needs to be analyzed, which involves frequent sampling and drug injection to help patients safely drain the target fluid out of the body.

[0003] In the related art, the drainage device includes a drainage catheter and a three-way valve connected in sequence. When the first interface and the second interface of the three-way valve are connected and the third interface is blocked by a protective cap, normal drainage operation can be performed; when the first interface and the third interface of the three-way valve are connected, the third interface is connected to a pressure monitoring device to monitor intracranial pressure; at the same time, when the first interface and the third interface of the three-way valve are connected, sampling and medication can also be directly performed from the third interface.

[0004] Therefore, during frequent sampling and medication operations, the three-way valve core needs to be rotated frequently, which can easily cause pathogens and particles in the external environment to enter the patient's body through the third interface, causing infection and endangering life. Summary of the invention

[0005] Based on this, it is necessary to provide an extracranial drainage device to address the problem that existing drainage devices pose a risk of infection to patients.

[0006] A brain external drainage device is used to drain the target fluid accumulation in the brain, and the drainage device comprises:

[0007] A drainage catheter is used to extend into the target effusion;

[0008] A sampling and drug administration assembly, comprising a sampling and drug administration pipeline and a sealing joint, wherein the sampling and drug administration pipeline has at least a first pipe opening, a second pipe opening and a third pipe opening, wherein the first pipe opening is connected to an end of the drainage catheter away from the target effusion, and the third pipe opening is connected to the sealing joint;

[0009] The collecting assembly is communicated with the second pipe opening.

[0010] In one embodiment, the sampling and drug administration pipeline includes a main pipeline and a branch pipeline, one end of the branch pipeline is connected to the main pipeline, the other end of the branch pipeline is the third pipeline opening, one end of the main pipeline is the first pipeline opening, and the other end is the second pipeline opening.

[0011] In one embodiment, the sealing connector is a heparin cap or a needle-free connector.

[0012] In one embodiment, the drainage device also includes a three-way valve, which has a first interface, a second interface and a third interface. The first interface is connected to the collection component, the second interface is connected to the second tube mouth of the sampling and dosing pipeline, and the third interface is used to connect to an auxiliary device.

[0013] In one embodiment, the sampling and dosing assembly further includes a flow stopper, which is disposed on the sampling and dosing pipeline and is close to one end of the second tube opening.

[0014] In one embodiment, the flow stopper is a flow stop clamp or a valve.

[0015] In one embodiment, the sampling and drug administration pipeline is a soft tube or a rigid tube.

[0016] In one of the embodiments, the external cranial drainage device further comprises a twist joint;

[0017] The second tube opening is connected to the collection component via the torsion joint, which is used to reduce the relative torsion when the sampling and dosing component is connected to the collection component, and / or the first tube opening is connected to the drainage catheter via the torsion joint, which is used to reduce the relative torsion when the sampling and dosing component is connected to the drainage catheter.

[0018] In one embodiment, the torsion joint includes a first pipe joint, a second pipe joint and a rotating nut, the rotating nut is rotatably sleeved on the outside of the second pipe joint, and the relative positions of the rotating nut and the second pipe joint along the axial direction of the rotating nut are fixed, the rotating nut has an internal thread, the first pipe joint has an external thread, and the rotating nut is used to be threadedly connected to the first pipe joint so that the second pipe joint can be inserted into the first pipe joint.

[0019] In one embodiment, the outer diameter of the second pipe joint gradually increases from an end close to the first pipe joint to an end far away from the first pipe joint, and the inner diameter of the first pipe joint matches the outer diameter of the second pipe joint.

[0020] The above-mentioned external brain drainage device is provided with a sampling and drug administration component, which includes a sampling and drug administration pipeline and a sealing joint. The first pipe opening of the sampling and drug administration pipeline is connected to the end of the drainage catheter away from the patient, and the second pipe opening of the sampling and drug administration pipeline is connected to the collection component, that is, the effusion in the patient's brain can be drained to the collection device through the first pipe opening and the second pipe opening. The third pipe opening of the sampling and drug administration pipeline is connected to the closed joint. When sampling and drug administration is required, there is no need to rotate the three-way joint, and sampling and drug administration can be performed directly from the third pipe opening, which is easy to operate and reduces the risk of infection caused by frequent rotation of the three-way joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the structure of an external craniocerebral drainage device in one embodiment.

[0022] Figure 2 Schematic diagram of the structure of a sampling and drug administration component in one embodiment.

[0023] Figure 3 Schematic diagram of the structure of an external cranial brain drainage device in another embodiment.

[0024] Figure 4 It is a schematic diagram of the structure of a sampling and drug administration component in another embodiment.

[0025] Figure 5 It is a schematic structural diagram of a first pipe joint and a second pipe joint in a torsion joint in an embodiment when they are not connected.

[0026] Figure 6 It is a structural schematic diagram of a first pipe joint and a second pipe joint in a torsion joint in an embodiment when they are connected.

[0027] Reference numerals: 100, drainage catheter;

[0028] 200, sampling and dosing assembly; 210, sampling and dosing pipeline; 211, main pipeline; 212, branch pipeline; 213, first pipeline opening; 214, second pipeline opening; 215, third pipeline opening; 220, sealing joint; 230, flow stopper;

[0029] 300, collecting assembly; 310, collecting bag; 320, drainage device;

[0030] 400, three-way valve;

[0031] 500, torsion joint; 510, first pipe joint; 520, second pipe joint; 530, rotation nut. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0033] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0034] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0036] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0038] In minimally invasive surgery for cerebral hemorrhage and cerebrospinal effusion, when the target effusion in the drainage catheter is observed to be turbid or the effusion is analyzed regularly, sampling and drug administration operations are required. In the related art, the first interface of the three-way valve is connected to the drainage catheter, the second interface is connected to the collection component, and the third interface is blocked by a protective cap.

[0039] Among them, the specific steps of the sampling operation through the three-way valve and the infection risks brought by each step are as follows: rotate the three-way valve core to make the first interface connected to the third interface. When the three-way valve core is rotated, the patient's body comes into contact with the contaminated environment for the first time, and the exposure level is 1; open the protective cap on the third interface, and the patient's body comes into contact with the contaminated environment for the second time, and the exposure level is 3; install the syringe and draw samples; disassemble the syringe, and the patient's body comes into contact with the contaminated environment for the third time, and the exposure level is 3; install the three-way valve side protective cap, and at this time, since the protective cap is exposed to the contaminated environment, the patient's body comes into contact with the contaminated environment for the fourth time, and the exposure level is 2; rotate the three-way valve core to make the first interface connected to the second interface. When the three-way valve core is rotated, the patient's body comes into contact with the contaminated environment for the fifth time, and the exposure level is 1.

[0040] In addition, the specific steps of the drug administration operation through the three-way valve and the infection risks brought by each step are as follows: rotate the three-way valve core to make the first interface and the third interface conductive. When the three-way valve core is rotated, the patient's body comes into contact with the contaminated environment for the sixth time, and the exposure level is 1; open the protective cap on the third interface, and the patient's body comes into contact with the contaminated environment for the seventh time, and the exposure level is 3; install the syringe and administer the drug; disassemble the syringe, and the patient's body comes into contact with the contaminated environment for the eighth time, and the exposure level is 3; install the three-way valve side protective cap, and at this time, since the protective cap is exposed to the contaminated environment, the patient's body comes into contact with the contaminated environment for the ninth time, and the exposure level is 2; rotate the three-way valve core to make the first interface and the second interface conductive. When the three-way valve core is rotated, the patient's body comes into contact with the contaminated environment for the tenth time, and the exposure level is 1.

[0041] That is, one sampling and drug administration operation involves a total of ten exposures to the sterile environment, including four exposures at level 1, two exposures at level 2, and four exposures at level 3. During the entire operation, multiple sampling and drug administration operations are required. For example, during the perioperative period, there are a total of 40 exposures to the sterile environment, including 16 exposures at level 1, 8 exposures at level 2, and 16 exposures at level 3.

[0042] See also Figure 1 and Figure 2 , an extracranial drainage device provided in one embodiment of the present application is used to drain the target effusion in the cranial brain, and the drainage device includes a drainage catheter 100, a sampling and dosing assembly 200, and a collecting assembly 300. The drainage catheter 100 is used to extend into the target effusion. The sampling and dosing assembly 200 includes a sampling and dosing pipeline 210 and a sealing joint 220. The sampling and dosing pipeline 210 has at least a first pipe opening 213, a second pipe opening 214, and a third pipe opening 215. The first pipe opening 213 is connected to an end of the drainage catheter 100 away from the target effusion, and the third pipe opening 215 is connected to the sealing joint 220. The collecting assembly 300 is connected to the second pipe opening 214.

[0043] In this embodiment, a sampling and dosing assembly 200 is provided, and the dosing and sampling assembly includes a sampling and dosing line 210 and a sealing joint 220. The first pipe opening 213 of the sampling and dosing line 210 is connected to the end of the drainage catheter 100 away from the patient, and the second pipe opening 214 of the sampling and dosing line 210 is connected to the collection assembly 300, that is, the effusion in the patient's skull and brain can be drained to the collection device through the first pipe opening 213 and the second pipe opening 214. The third pipe opening 215 of the sampling and dosing line 210 is connected to the closed joint. When sampling and dosing operations are required, there is no need to rotate the three-way joint, and sampling and dosing can be performed directly from the third pipe opening 215. Therefore, the risk of double exposure caused by rotating the three-way valve core during the sampling operation can be reduced, and the risk of double exposure caused by rotating the three-way valve core during the dosing operation can be reduced. At the same time, sampling and dosing are performed directly from the third pipe opening 215. ， Easy to operate.

[0044] The collecting assembly 300 includes a drainage device 320 and a collecting bag 310 which are connected in sequence. One end of the drainage device 320 away from the collecting bag 310 is connected to the second pipe opening 214 of the sampling and dosing pipeline 210 .

[0045] See also Figure 1 and Figure 2 In one embodiment, the sampling and dosing pipeline 210 includes a main pipeline 211 and a branch pipeline 212, one end of the branch pipeline 212 is connected to the main pipeline 211, and the other end of the branch pipeline 212 is a third pipe opening 215. One end of the main pipeline 211 is a first pipe opening 213, and the other end is a second pipe opening 214.

[0046] That is, one end of the main line 211 is connected to the drainage catheter 100, and the other end is connected to the collection assembly 300, so as to guide the target effusion in the cranium to the collection assembly 300. One end of the branch line 212 is connected to the main line 211, and the other end is sealed by the sealing joint 220. When sampling and medication are required, sampling and medication can be performed directly from the sealing joint 220 end of the branch line 212, reducing the risk of infection caused by frequent rotation of the three-way joint.

[0047] In another embodiment, see Figure 3 and Figure 4 Alternatively, the sampling and dosing pipeline 210 includes a main pipeline 211 and a branch pipeline 212, one end of the branch pipeline 212 is connected to the main pipeline 211, the other end of the branch pipeline 212 is a second pipe opening 214, one end of the main pipeline 211 is a first pipe opening 213, and the other end is a third pipe opening 215.

[0048] That is, one end of the branch line 212 is connected to the drainage catheter 100, and the other end is connected to the collection assembly 300, so as to guide the target effusion in the cranium to the collection assembly 300. One end of the main line 211 is connected to the branch line 212, and the other end is sealed by the sealing joint 220. When sampling and medication are required, sampling and medication can be performed directly from the sealing joint 220 end of the main line 211, reducing the risk of infection caused by frequent rotation of the three-way joint.

[0049] See also Figure 1 and Figure 2 For the convenience of description, the following description is based on the assumption that one end of the branch pipeline 212 is connected to the main pipeline 211, the other end of the branch pipeline 212 is the third pipe opening 215, one end of the main pipeline 211 is the first pipe opening 213, and the other end is the second pipe opening 214.

[0050] Specifically, the sealing connector 220 is a heparin cap or a needle-free connector.

[0051] The third tube mouth 215 is sealed by a heparin cap or a needleless connector, so that the third tube mouth 215 is always in a relatively sealed state. When sampling and medication operation is required, there is no need to remove the heparin cap or the needleless connector. It is only necessary to disinfect the surface of the heparin cap, and then directly pass through the heparin cap or the needleless connector for sampling and medication. That is, during the entire sampling and medication operation, the third tube mouth 215 is not in contact with the outside air, which can effectively prevent bacteria and particles in the external environment from entering the third tube mouth 215, thereby reducing the three exposure risks caused by disassembling the protective cap and disassembling the syringe during the sampling operation, and can reduce the three exposure risks caused by disassembling the protective cap and disassembling the syringe during the medication operation. At the same time, since there is no need to remove the heparin cap or the needleless connector, the operation is simple and easy to use.

[0052] In the related art, since only a three-way valve 400 is provided, the third interface of the three-way valve 400 is not only connected to the pressure detection device, but also used for sampling and drug administration. During the sampling and drug administration operation, the pressure detection device needs to be removed first, and then the sampling and drug administration is performed through the third interface. However, during this process, the third interface is exposed to the air for a long time. At the same time, since the sampling and drug administration operation is also relatively frequent, it is easy for pathogens and particles in the external environment to enter the patient's body through the third interface, causing infection and endangering life.

[0053] In some embodiments, the drainage device further includes a three-way valve 400, which has a first interface, a second interface, and a third interface, wherein the first interface is connected to the collection assembly 300, the second interface is connected to the second nozzle 214 of the sampling and drug administration pipeline 210, and the third interface is used to connect to an auxiliary device. The auxiliary device may be a pressure detection device for monitoring intracranial pressure.

[0054] The first interface of the three-way valve 400 is connected to the collection component 300, and the second interface is directly connected to the second nozzle 214 of the sampling and drug administration pipeline 210, that is, the effusion in the patient's cranial brain can flow into the collection component 300 through the first nozzle 213, the second nozzle 214, the second interface of the three-way valve 400 and the first interface of the sampling and drug administration pipeline 210 in sequence. Sampling and drug administration can be performed through the third nozzle 215 of the sampling and drug administration pipeline 210, and pressure detection can be performed through the third nozzle 215 of the three-way valve 400, that is, both can be performed at the same time. In addition, during the sampling and drug administration operation, there is no need to remove the pressure detection setting, which reduces the exposure time of the third interface in the air, thereby reducing the patient's infection risk.

[0055] In some embodiments, the sampling and dosing assembly 200 further includes a flow stopper 230 , which is disposed on the sampling and dosing pipeline 210 and is close to one end of the second tube opening 214 .

[0056] In this embodiment, a flow stopper 230 is provided on the sampling and drug administration pipeline 210, and the flow stopper 230 is located at one end close to the second pipe opening 214, that is, the flow stopper 230 is located above the connection position between the branch pipeline and the main pipeline. When administering the drug to the patient, the flow stopper 230 can be closed to avoid unnecessary drug backflow and improve the drug injection efficiency.

[0057] Specifically, the flow stopper 230 is a flow stopper clamp or a valve.

[0058] In some embodiments, the sampling and dosing pipeline 210 is a hose or a rigid tube. When the sampling and dosing pipeline 210 is a hose, the flow stopper 230 is a stopper clamp. When the sampling and dosing pipeline 210 is a rigid tube, the flow stopper 230 is a valve, wherein the valve can be a two-way valve.

[0059] The sampling operation of the extracranial drainage device of the present application includes: connecting the first pipe port 213 and the second pipe port 214 of the three-way valve 400, and closing the third pipe port 215; closing the flow stop 230; disinfecting the surface of the sealing joint 220; puncturing the heparin cap with a syringe (the heparin cap meets the sealing requirement of at least 30 punctures) to draw out the sample; disassembling the syringe; and finally closing the flow stop 230.

[0060] The sampling operation of the extracranial drainage device of the present application includes: connecting the first pipe port 213 and the second pipe port 214 of the three-way valve 400, and closing the third pipe port 215; closing the flow stop 230; disinfecting the surface of the sealing joint 220; puncturing the heparin cap with a syringe (the heparin cap meets the sealing requirement of at least 30 punctures) to administer the drug; disassembling the syringe; and finally closing the flow stop 230.

[0061] During the above operation, the heparin cap was punctured twice, and the exposure was 0 times. During the perioperative period, the heparin cap was punctured 8 times in total, and the exposure was 0 times. Therefore, it can greatly prevent the bacteria and particles in the external environment from entering the patient's body through the third interface and causing infection.

[0062] In some embodiments, the extracranial drainage device further includes a twist joint 500, and the second tube port 214 is connected to the collection assembly 300 via the twist joint 500. The twist joint 500 is used to reduce the relative twisting when the sampling and dosing assembly 200 is connected to the collection assembly 300, and reduce the risk of positional displacement of the drainage catheter 100 at the patient end caused by the twisting when the sampling and dosing assembly 200 is connected to the collection assembly 300.

[0063] In some other embodiments, the extracranial drainage device may further include a torsion joint 500, and the first tube opening 213 is connected to the drainage catheter 100 via the torsion joint 500. Similarly, the torsion joint 500 is used to reduce the relative torsion when the sampling and dosing assembly 200 is connected to the drainage catheter 100, thereby reducing the risk of positional displacement of the drainage catheter 100 at the patient end.

[0064] In some other embodiments, the extracranial drainage device further includes a twist joint 500, the second tube opening 214 is connected to the collection assembly 300 via the twist joint 500, and at the same time, the first tube opening 213 is connected to the drainage catheter 100 via the twist joint 500. That is, the risk of positional displacement of the drainage catheter 100 at the patient end caused by twisting the pipeline when the sampling and dosing assembly 200 is connected can be reduced to the greatest extent.

[0065] For further information, see Figure 5 and Figure 6The torsion joint 500 includes a first pipe joint 510, a second pipe joint 520 and a rotating nut 530. The rotating nut 530 is rotatably sleeved on the outside of the second pipe joint 520, and the relative positions of the rotating nut 530 and the second pipe joint 520 along the axial direction of the rotating nut 530 are fixed. The rotating nut 530 has an internal thread, and the first pipe joint 510 has an external thread. The rotating nut 530 is used to be threadedly connected with the first pipe joint 510 so that the second pipe joint 520 can be inserted into the first pipe joint 510.

[0066] Taking the example of the first tube opening 213 and the drainage catheter 100 being connected via the twist joint 500 , the first tube joint 510 can be connected to either the first tube opening 213 or the drainage catheter 100 , and the second tube joint 520 can be connected to the other of the first tube opening 213 or the drainage catheter 100 .

[0067] During the actual connection, the first pipe joint 510 is first docked with the second pipe joint 520, and the second pipe joint 520 is gently inserted into the first pipe joint 510, and then the rotating nut 530 is rotated. Since the rotating nut 530 is threadedly matched with the first pipe joint 510, and the relative positions of the rotating nut 530 and the second pipe joint 520 along the axial direction of the rotating nut 530 are fixed, when the rotating nut 530 is rotated, the rotating nut 530 can drive the first pipe joint 510 to move toward the second pipe joint 520, so that the second pipe joint 520 is deeply inserted into the first pipe joint 510, that is, the first pipe joint 510 and the second pipe joint 520 can be tightly matched without causing the first pipe joint 510 and the second pipe joint 520 to rotate, which can be used to prevent the risk of position displacement of the patient-end drainage catheter 100 caused by twisting of the first pipe joint 510 and the second pipe joint 520 during assembly.

[0068] Specifically, the outer diameter of the second pipe joint 520 gradually increases from an end close to the first pipe joint 510 to an end away from the first pipe joint 510 , and the inner diameter of the first pipe joint 510 is matched with the outer diameter of the second pipe joint 520 .

[0069] In this embodiment, the inner diameter of the first pipe joint 510 gradually decreases from the end close to the second pipe joint 520 to the end away from the second pipe joint 520. Therefore, when the rotating nut 530 is rotated, the second pipe joint 520 can gradually penetrate into the first pipe joint 510, and the fit between the two becomes increasingly tight.

[0070] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A cranial external drainage device, characterized in that: Used to drain the target fluid accumulation in the brain, the drainage device includes: A drainage catheter (100) is used to extend into the target effusion; A sampling and drug administration assembly (200), comprising a sampling and drug administration pipeline (210) and a sealing joint (220), wherein the sampling and drug administration pipeline (210) has at least a first pipe opening (213), a second pipe opening (214) and a third pipe opening (215), wherein the first pipe opening (213) is connected to an end of the drainage catheter (100) away from the target effusion, and the third pipe opening (215) is connected to the sealing joint (220); and The collecting assembly (300) is in communication with the second pipe opening (214).

2. The external brain drainage device according to claim 1, characterized in that: The sampling and drug administration pipeline (210) comprises a main pipeline (211) and a branch pipeline (212); one end of the branch pipeline (212) is connected to the main pipeline (211); the other end of the branch pipeline (212) is the third pipeline opening (215); one end of the main pipeline (211) is the first pipeline opening (213); and the other end is the second pipeline opening (214).

3. The external brain drainage device according to claim 1, characterized in that: The sealing connector (220) is a heparin cap or a needle-free connector.

4. The external cranial drainage device according to claim 1, characterized in that: The drainage device also includes a three-way valve (400), which has a first interface, a second interface and a third interface, the first interface is connected to the collection component (300), the second interface is connected to the second tube opening (214) of the sampling and dosing pipeline (210), and the third interface is used to connect to an auxiliary device.

5. The external craniocerebral drainage device according to claim 1, characterized in that: The sampling and dosing assembly (200) further comprises a flow stopper (230), wherein the flow stopper (230) is arranged on the sampling and dosing pipeline (210) and is close to one end of the second pipe opening (214).

6. The external cranial drainage device according to claim 5, characterized in that: The flow stopper (230) is a flow stopper clamp or a valve.

7. The external cranial drainage device according to claim 1, characterized in that: The sampling and drug administration pipeline (210) is a flexible pipe or a rigid pipe.

8. The external craniocerebral drainage device according to any one of claims 1 to 7, characterized in that: The extracranial drainage device further comprises a torsion joint (500); The second tube opening (214) is connected to the collection component (300) via the twist joint (500) to avoid relative twisting when the sampling and dosing component (200) is connected to the collection component (300), and / or the first tube opening (213) is connected to the drainage catheter (100) via the twist joint (500) to reduce relative twisting when the sampling and dosing component (200) is connected to the drainage catheter (100).

9. The external brain drainage device according to claim 8, characterized in that: The torsion joint (500) comprises a first pipe joint (510), a second pipe joint (520) and a rotating nut (530); the rotating nut (530) is rotatably sleeved outside the second pipe joint (520), and the relative positions of the rotating nut (530) and the second pipe joint (520) along the axial direction of the rotating nut (530) are fixed; the rotating nut (530) has an internal thread, and the first pipe joint (510) has an external thread; the rotating nut (530) is used to be threadedly connected to the first pipe joint (510) so that the second pipe joint (520) is connected to the first pipe joint (510).

10. The external brain drainage device according to claim 9, characterized in that: The outer diameter of the second pipe joint (520) gradually increases from an end close to the first pipe joint (510) to an end away from the first pipe joint (510), and the inner diameter of the first pipe joint (510) is matched with the outer diameter of the second pipe joint (520).

Images