A ventricular support and drainage apparatus

Abstract

The application discloses a ventricular support drainage device, which comprises a drainage tube, a self-expanding support bracket, a delivery tube and a support strip. The self-expanding support bracket is arranged outside the drainage tube, and the support bracket in an expanded state is used for supporting the ventricular wall. A small protrusion is arranged inside the support bracket, and the small protrusion is in close contact with the drainage tube in a compressed state. The delivery tube is sleeved outside the drainage tube and the support bracket, and is used for maintaining the drainage tube and the support bracket in the compressed state. The support strip is arranged inside the drainage tube in the compressed state, and is used for supporting the whole structure during delivery. The support strip is used for delivering the drainage tube and the support bracket compressed in the delivery tube to a drainage position under the support of the support strip, and maintaining the position of the drainage tube unchanged when the delivery tube is withdrawn. The support strip is blocked at the first end of the drainage tube. The arrangement guarantees that the drainage device is effectively delivered, and the support bracket plays a supporting role and the drainage tube plays a drainage role after being delivered.

Description

Technical Field

[0001] This invention belongs to the field of brain drainage device technology, specifically relating to ventricular drainage devices, and more specifically to a ventricular support drainage device. Background Technology

[0002] Surgery involving the ventricles, especially the lateral ventricles, often results in cerebrospinal fluid (CSF) accumulation post-surgery. This requires drainage devices to remove excess CSF, reducing intracranial pressure and promoting patient recovery. However, in addition to CSF ​​accumulation, ventricle surgery carries the risk of interventricular adhesions. These adhesions are typically random and occur in multiple locations, dividing the ventricles into multiple regions. Therefore, post-operative drainage of the surgical area is necessary, along with measures to prevent further intraventricular adhesions.

[0003] Traditional drainage devices are relatively small and primarily function as drainage devices. They are prone to deformation under high interstitial pressure, which can lead to tissue adhesions. Once adhesions occur, they can affect the subsequent circulation of cerebrospinal fluid between the ventricles.

[0004] Therefore, a drainage device is needed that can ensure drainage in multiple areas and avoid adhesion. Summary of the Invention

[0005] To address the aforementioned technical issues, separately setting up drainage and support devices would increase the difficulty of the surgical procedure. Integrating drainage and support functions into a single device could provide necessary tissue support while maintaining cerebrospinal fluid circulation. However, how to combine the support device with the drainage tube to maintain ventricular support while ensuring drainage remains a challenge. Placing the support device inside the drainage device would make it difficult to expand, and once expanded, it would be difficult to retract to its original size. Since postoperative ventricular support and drainage typically last 2-4 weeks, it is a temporary device; therefore, placing the support stent inside the drainage tube is not an effective solution.

[0006] This application utilizes a self-expanding support stent positioned outside a drainage tube, with a delivery tube on the outer side to maintain both the drainage tube and the support stent in a compressed state. An elastic support bar is positioned inside the drainage tube. Supported by the support bar, the delivery tube, the compressed drainage tube, and the support stent are delivered to the precise location within the ventricle. The support bar then maintains the position of the drainage tube and the relative position of the support stent and drainage tube. The delivery tube is then withdrawn, exposing the support stent. Upon exposure, the support stent self-expands at the target location to provide support, and the compressed drainage tube expands to provide drainage. After use, the support stent is retracted back into the delivery tube using the delivery tube and support bar, or the support stent can be made of absorbable material, requiring only the drainage tube to be removed after use.

[0007] The specific technical solution is as follows: a ventricular support and drainage device, which includes: a drainage tube, a self-expanding support frame, a delivery tube, and a support bar.

[0008] The drainage tube has a drainage hole on the side wall of its first end for the drainage of cerebrospinal fluid.

[0009] A self-expanding support stent is disposed on the outside of the drainage tube. The expanded support stent is used to support the ventricular wall and prevent adhesion. A small protrusion is provided on the inside of the support stent. In the compressed state, the small protrusion is in close contact with the drainage tube.

[0010] A delivery tube, fitted over the drainage tube and support frame, is used to keep the drainage tube and support frame in a compressed state to facilitate delivery to a designated location in the ventricle.

[0011] A support bar is installed inside the compressed drainage tube. The support bar is flexible and can be made of metal. It is used to support the overall structure during the conveying process and, under the support of the support bar, delivers the drainage tube and support bracket compressed in the conveying tube to the drainage part. It also maintains the position of the drainage tube when the conveying tube is withdrawn. The support bar is blocked at the first end of the drainage tube.

[0012] The drainage tube and the support stent are kept in a compressed state inside the delivery tube and are delivered to the ventricle using the support bar. After being delivered to the accurate position, the position of the drainage tube is maintained by the support bar. The delivery tube is then withdrawn. During the withdrawal process, the position of the support stent and the drainage tube does not change due to the contact friction between the small protrusion on the inner side of the support stent and the drainage tube. The withdrawal of the delivery tube exposes the support stent, which then expands outward along the longitudinal axis perpendicular to the support bar.

[0013] Furthermore, the support stent is made of absorbable material. This design ensures that only the drainage tube needs to be removed after use, without having to consider the retrieval of the support stent, thereby further reducing the complexity and risk of the surgical procedure.

[0014] Furthermore, the stent is covered with a membrane. The design of the membrane can reduce the friction between the stent and the ventricular wall, making the stent deployment smoother and reducing stimulation to the ventricular wall, thereby reducing the risk of postoperative inflammatory response.

[0015] Furthermore, multiple separate support stents are installed to support the postoperative ventricular wall at different locations, preventing adhesions. The multiple separate stents allow for shape flexibility to ensure conformity with the ventricular shape, thus better adapting to individual anatomical differences. The length of a single support stent ranges from 5-10 mm; the spacing between any two adjacent stents is controlled within the range of 3-8 mm to ensure effective support of the ventricular wall and unobstructed drainage channels.

[0016] Furthermore, drainage holes are provided on the sidewall of the drainage tube area covered by the support bracket. The drainage holes are evenly distributed around the circumference of the drainage tube to ensure that the drainage fluid can fully enter the inner cavity of the drainage tube.

[0017] Furthermore, a connecting line is installed between the drainage tube and the support bracket to maintain the relative position of the support bracket and the drainage tube when the support bracket expands, ensuring the synchronicity and stability of drainage and support.

[0018] Furthermore, the drainage tube includes an implanted segment with a length ranging from 8-10 cm. The delivery tube is positioned outside the implanted segment, and the support strip is at least twice the length of the implanted segment. This design ensures that the position of the drainage tube remains unchanged when the delivery tube is withdrawn, thanks to the support strip. Alternatively, a longitudinal opening can be provided through the delivery tube, with the support strip at least once the length of the implanted segment. The delivery tube is elastic, allowing it to separate from the support strip through the longitudinal opening during withdrawal. This design ensures that the delivery tube can be withdrawn with minimal distance.

[0019] Furthermore, the inner diameter of the drainage tube ranges from 3 to 5 mm, the outer diameter ranges from 4 to 6 mm, and the outer diameter of the support bracket ranges from 7 to 10 mm. This size design ensures that there is sufficient space between the drainage tube and the support bracket, ensuring the flow of drainage fluid, and the drainage process is not affected by the membrane-covered support bracket.

[0020] Furthermore, a drug delivery tube is installed on the inner wall of the drainage tube. The inner diameter of the drug delivery tube ranges from 0.1 to 0.2 mm, and the length ranges from 10 to 15 cm. This setting of inner diameter and length can ensure the application of a small amount of drug to the ventricle and can also effectively avoid the presence of too much drug in the drug delivery tube, which would affect the quantitative application of the drug.

[0021] Technical effects of the present invention

[0022] By placing a self-expanding support stent on the outside of the drainage tube, combined with the synergistic effect of the delivery tube and support strip, the support stent and drainage tube can be quickly and effectively delivered into the ventricle. After the delivery tube is withdrawn, the support stent expands to provide support and prevent ventricular adhesions, while the drainage tube inside the support stent provides drainage. A small protrusion on the inside of the support stent ensures that the position of the support stent and drainage tube remains unchanged during the retraction of the delivery tube.

[0023] Furthermore, because both the support stent and the drainage tube are placed in a compressed state within the delivery tube, the outer diameter of the delivery tube in its delivery state is comparable to that of the drainage tube in its natural state. The overall outer diameter is not increased due to the multi-layered structure. Therefore, the insertion process of this type of structure does not cause greater trauma than traditional drainage tube placement. Ultimately, this approach does not increase surgical trauma, is simple to operate, allows doctors to quickly complete insertion and removal, promotes rapid postoperative recovery, reduces patient suffering and hospitalization time, and its overall structural design is reasonable, suitable for different types of ventricular drainage needs, and has good clinical application prospects.

[0024] The use of multiple separate support stents ensures smooth flow of drainage fluid across different areas, avoiding the problem of drainage fluid not being able to enter the space between the support stent and the drainage tube, which can occur with a single covered support stent and thus affect overall drainage efficiency. Furthermore, the use of multiple support stents allows the overall structure to be deformable to adapt to changes in ventricular morphology, while providing uniform support in different areas.

[0025] By using a drug delivery tube with an inner diameter of 0.1-0.2 mm that is closely attached to the drainage tube, it is possible to ensure that the drug is administered using the drug delivery tube inside the thinner drainage tube. Furthermore, because the inner diameter of the drug delivery tube is small, the error of drug retention in the drug delivery tube can be minimized, ensuring accurate drug delivery to the ventricle. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the invention combined with the drainage bag in its usage state;

[0027] Figure 2 This is a schematic diagram of the longitudinal cross-sectional structure of the present invention in a compressed state;

[0028] Figure 3 For the present invention Figure 2 A magnified schematic diagram of a portion of circle A;

[0029] Figure 4 For the present invention Figure 2 A magnified schematic diagram of a portion of circle B;

[0030] Figure 5This is a schematic diagram of the expanded state of the drainage tube and support stent corresponding to the implanted segment of the present invention.

[0031] Figure 6 This is a partially enlarged structural diagram of the implanted segment end of the present invention;

[0032] Figure 7 This is a schematic diagram of the upper structure of the drainage device of the present invention;

[0033] Figure 8 This is a schematic diagram of the support structure with a membrane according to the present invention;

[0034] Figure 9 This is a partially enlarged structural diagram of the drainage tube portion corresponding to the drainage hole area of ​​the present invention;

[0035] Figure 10 A partially enlarged cross-sectional view of the drainage tube portion corresponding to the drainage hole area of ​​this invention;

[0036] Figure 11 For the present invention Figure 10 A magnified schematic diagram of the middle circle C;

[0037] Figure 12 A schematic diagram of a conveying pipe structure with a longitudinal opening;

[0038] Explanation of main figure symbols

[0039] 1. Drainage tube; 11. Drainage hole; 12. Hemispherical structure; 13. Implantation segment; 2. Support frame; 21. Covering membrane; 3. Delivery tube; 31. Longitudinal port; 4. Support strip; 5. Connecting wire; 6. Drug delivery tube; 61. Drug application port; 62. Extension segment; 63. Connector; 7. Microinjector; 8. Drainage bag. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] In this document, “illustrative” means “serving as an example, illustration or description”, and any illustration or implementation described herein as “illustrative” should not be construed as a more preferred or advantageous technical solution.

[0042] To keep the drawings concise, only the parts relevant to this application are shown schematically in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, only one of the components with the same structure or function is shown schematically, or only one of them is labeled.

[0043] In this document, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connected," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] refer to Figure 1-6 A ventricular support and drainage device, comprising: a drainage tube, a self-expanding support frame, a delivery tube, and a support bar.

[0045] The drainage tube is used to drain the postoperative cerebrospinal fluid into an external drainage bag. A drainage hole is provided on the side wall of the first end of the drainage tube. The inner diameter of the drainage tube is 3-5 mm and the outer diameter is 4-6 mm. The preferred size is an inner diameter of 4 mm and an outer diameter of 5 mm. Of course, other combinations of inner and outer diameters can also be selected. The wall thickness of the drainage tube is 1 mm.

[0046] A self-expanding support stent is positioned outside the drainage tube. In its expanded state, the stent supports the ventricular wall, preventing adhesions. It should be noted that the stent and drainage tube are in a compressed state when not in use and in an expanded state when in use. Small protrusions are provided on the inner side of the stent. In the compressed state, these protrusions are in close contact with the drainage tube. These small protrusions can be arranged along the circumference of the stent, and multiple circular protrusions can be provided. This arrangement ensures the stability of the positional relationship between the stent and drainage tube in the compressed state.

[0047] A delivery tube, fitted over the drainage tube and support frame, is used to keep the drainage tube and support frame in a compressed state to facilitate delivery to a designated location in the ventricle.

[0048] A support bar is installed inside the compressed drainage tube. The support bar is flexible and can be made of metal. It is used to support the overall structure during the conveying process and, under the support of the support bar, delivers the drainage tube and support bracket compressed in the conveying tube to the drainage part. It also maintains the position of the drainage tube when the conveying tube is retracted. The support bar is blocked at the first end of the drainage tube.

[0049] The drainage tube and support stent are kept in a compressed state within the delivery tube and are delivered into the ventricle using a support bar. Once in the correct position, the position of the drainage tube is maintained by the support bar. The delivery tube is then withdrawn. During withdrawal, the position of the support stent and drainage tube does not change due to the contact friction between the small protrusion on the inner side of the support stent and the drainage tube. Withdrawing the delivery tube exposes the support stent, and the support stent and drainage tube expand outward along the longitudinal axis perpendicular to the support bar, changing from a compressed state to an expanded state.

[0050] During the procedure, the puncture path is first determined using CT or MRI. Common approaches include frontal horn puncture (Kocher's point) and occipital horn puncture (Frazier's foramen). Then, local anesthesia is administered, and a hole is drilled through the skull to establish the actual drainage tube path. The delivery tube is then inserted into the ventricle through this path. Intraoperative imaging can be used to observe whether the tube has reached the correct position, or the insertion depth can be used to determine if the tube and support structure are in the correct location. After confirming the position is correct, the delivery tube is held externally in one hand, and the support strip in the other, using the support strip to maintain the position of the tube and support structure within the body. The delivery tube is then withdrawn, leaving the support structure in place. Once exposed, the support structure expands within the ventricle, supporting the ventricular wall and effectively preventing ventricular wall adhesions. This also ensures the stability of the drainage tube's shape within the ventricle, guaranteeing drainage effectiveness. After the delivery tube is withdrawn, the support strip is also removed. Because the support strip is placed inside the compressed drainage tube, its size is smaller than the expanded tube, allowing for easy withdrawal. After a 2-4 week ventricular drainage cycle, the drainage tube can be removed directly, or the support can be retracted into the delivery tube and the entire structure can be removed. It should be noted that the drainage area includes, but is not limited to, the lateral ventricles. The device can also be advanced to the area between the two ventricles.

[0051] By placing a self-expanding support stent on the outside of the drainage tube, combined with the synergistic effect of the delivery tube and support strip, the support stent and drainage tube can be quickly and effectively delivered to the ventricle. After the delivery tube is withdrawn, the support stent expands to provide support and prevent ventricular adhesions, while the drainage tube inside the support stent provides drainage. A small protrusion on the inside of the support stent ensures that the position of the support stent and drainage tube remains unchanged during the withdrawal of the delivery tube. Furthermore, because both the support stent and drainage tube are placed in a compressed state within the delivery tube, the outer diameter of the delivery tube in the delivery state is comparable to the outer diameter of the drainage tube in its natural state. This avoids an increase in the overall outer diameter due to the multi-layered structure, thus minimizing the trauma associated with traditional drainage tube placement. After drainage, the support stent can be retracted into the delivery tube and withdrawn, or it can be left in the body to provide continuous support. Alternatively, absorbable materials can be used to prepare the support stent, allowing it to be absorbed within the body. This simplifies the surgical procedure and reduces patient recovery time and the risk of postoperative complications. Ultimately, this approach does not add extra surgical trauma, is simple to operate, allows doctors to quickly complete insertion and withdrawal, promotes rapid postoperative recovery, reduces patient suffering and hospitalization time, and has a reasonable overall structural design suitable for different types of ventricular drainage needs, showing good clinical application prospects.

[0052] To ensure easy removal of the structure after drainage, the support stent is made of absorbable material. This design allows for simple removal of the drainage tube after use, eliminating the need for stent retrieval and further reducing the complexity and risk of the surgical procedure. The absorbable material allows the stent to be naturally absorbed by the body over time, without causing secondary burden on the patient, and avoids potential infections or other complications caused by stent residue. This design not only optimizes the overall safety of the drainage system but also provides greater convenience for postoperative management. The physician does not need to perform complex retrieval procedures after drainage; the drainage tube can be removed using standard methods, significantly shortening the surgical time and improving patient comfort.

[0053] A more preferred embodiment is, referring to Figures 6-8The stent is covered with a membrane. The membrane design reduces friction between the stent and the ventricular wall, allowing for smoother stent deployment and reducing irritation to the ventricular wall, thus minimizing the risk of postoperative inflammation. Most importantly, it prevents ventricular wall tissue from entering the stent through the mesh. Excessive tissue intrusion can still lead to adhesions; the membrane design significantly reduces this risk, further improving drainage and postoperative safety. The membrane material is preferably a biocompatible polymer that not only has good lubrication properties but also effectively reduces tissue adhesion, ensuring the long-term stability of the stent within the ventricle.

[0054] A more preferred embodiment is, referring to Figure 5 and Figure 6 To ensure a proper fit between the drainage device and the drainage site, a medical-grade soft drainage tube, preferably made of silicone rubber, is used. Multiple separate support brackets are installed on the outside of the drainage tube to support the postoperative ventricular wall at different locations. These separate brackets allow for shape variability, enabling the drainage tube to adapt to changes in ventricular shape and maintain a consistent fit, thus better accommodating individual anatomical differences. This design ensures smooth flow of drainage fluid between different areas, avoiding the problem of drainage fluid not entering the space between the support bracket and the drainage tube, which can occur with a single covered support bracket and thus affect overall drainage efficiency. The multiple separate support brackets can be customized according to the actual ventricular morphology and can be temporarily prepared for use during surgery based on the individualized structure. More specifically, the length of a single support bracket is 5-10mm; the distance between any two adjacent support brackets is controlled within the range of 3-8mm, the inner diameter of the drainage tube is 3-5mm, the outer diameter is 4-6mm, and the outer diameter of the support bracket is 7-10mm. Through the above series of size settings, sufficient space can be ensured between the drainage tube and the support bracket to ensure the flow of drainage fluid, and the drainage process will not be affected by the membrane-covered support bracket.

[0055] refer to Figures 9-11 Drainage holes are provided on the sidewalls of the drainage tube area covered by the support bracket. These holes are evenly distributed around the circumference of the drainage tube to ensure sufficient drainage fluid enters the inner lumen of the tube. The diameter of the drainage holes is preferably 0.5-2 mm to prevent blockage by tissue debris. Three rows of drainage holes are arranged along the longitudinal axis of the drainage tube. The distance between adjacent drainage holes in each row ranges from 5-10 mm to ensure continuous drainage fluid flow and simultaneously maintain the strength of the drainage tube.

[0056] A more preferred embodiment is, referring to Figure 7To ensure the drainage tube remains centered on the support after expansion and to maintain relative positional stability, a connecting line is installed between the drainage tube and the support. This line maintains the relative position of the support and drainage tube during expansion, ensuring synchronization and stability of drainage and support. Specifically, the connecting line is arranged along the axial direction of the support to ensure the drainage tube is pulled and confined within the support. This ensures the drainage tube remains centered on the support after expansion, providing a uniform space between the support and the drainage tube, allowing drainage fluid to enter this space and ensuring smooth drainage. More specifically, the connecting line is made of a flexible polymer material with good biocompatibility and tensile strength. The preferred number of connecting lines is 8-16, evenly distributed between the support and the drainage tube to achieve balanced traction and positioning of the drainage tube. When the support is expanded, the connecting line is under moderate tension to ensure the drainage tube remains centered. The connecting sutures are positioned in the middle of the support frame, and all sutures are placed on the same plane to ensure balanced traction. When only the drainage tube is removed postoperatively, the connecting sutures are made of absorbable material.

[0057] A more preferred embodiment is described in reference to... Figures 9-11 To ensure the support strip effectively guides the drainage tube after assembly, a hemispherical structure is incorporated at the first end of the drainage tube. This structure serves to confine the support strip within the drainage tube at its first end. The outer surface of the hemispherical structure is smooth to minimize stimulation and damage to brain tissue. The hemispherical structure is fixed to the drainage tube via adhesive bonding or by molding using the same material.

[0058] A more preferred embodiment is described in reference to... Figure 5 The drainage tube includes an implantable segment with a length ranging from 8-15 cm, the length of which varies depending on the type of ventricle. The delivery tube is positioned outside the implantable segment, and the support strip is at least twice the length of the implantable segment. This design ensures that the position of the drainage tube remains constant during withdrawal via the support strip. Alternatively, a longitudinal opening can be provided through the delivery tube, with the support strip at least once the length of the implantable segment. The delivery tube is elastic, allowing it to separate from the support strip through the longitudinal opening during withdrawal. This design ensures withdrawal of the delivery tube with minimal distance. Furthermore, the curvature of the longitudinal opening is less than 5° in cross-section. This design prevents the longitudinal opening from affecting the overall structural strength of the delivery tube, thus maintaining the tube's restraining effect on the support frame and drainage tube. The first end of the implantable segment is hemispherical, and the second end has a connector that connects to the connecting tube extending from the drainage bag.

[0059] A more preferred embodiment is described in reference to... Figure 5 , Figure 9, Figure 11 Because postoperative medication is required after ventricular surgery to ensure proper postoperative care, dedicated puncture treatment would increase patient trauma. Direct medication administration via the drainage tube would be affected by the tube's diameter, impacting both the speed and amount of medication delivery. Therefore, how to administer medication through the drainage tube without re-establishing a puncture route is a technical challenge in ventricular surgery. This is addressed by installing a drug delivery tube on the inner wall of the drainage tube. The inner diameter of the drug delivery tube is 0.1-0.2 mm, and its length is 10-15 cm. This inner diameter and length ensures precise drug delivery to the ventricle and effectively prevents excessive medication accumulation in the delivery tube, which would affect the dosage. More specifically, to ensure uniform medication distribution throughout the ventricle, the drug delivery tube is integrally connected to the drainage tube. A row of drug application holes is installed along the longitudinal axis of the drainage tube on its sidewall, opening from the sidewall towards the drug delivery tube. The orifice diameter of the drug delivery tube ranges from 0.05 to 0.1 mm and is evenly distributed along the longitudinal axis of the drainage tube, ensuring that the drug can be released into different areas of the ventricle in a controlled manner. Furthermore, the drug delivery tube includes an extension section on the outside of the drainage tube, with a connector on the extension section for connection to the injection head of a micro-injector. The connection between the connector and the injection head is achieved via a threaded connection, which effectively ensures micro-injection and avoids drug waste due to gaps at the connector. In operation, the injection head of the micro-injector is combined with the connector of the extension tube, and the drug in the syringe is injected into the ventricle. It is essential that there are no extra gaps after the injection head and connector are combined to minimize injection error and ensure injection safety. Ultimately, this design allows for control of the fluid volume within the tube to a few microliters, effectively avoiding drug administration errors.

[0060] The above description is merely a specific embodiment of this application. Under the guidance of the above teachings, those skilled in the art can make other improvements or modifications based on the above embodiments. Those skilled in the art should understand that the above specific description is only to better explain the purpose of this application, and the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A ventricular support drainage device, comprising, A drainage tube, wherein a drainage hole is provided on the side wall of its first end for drainage of cerebrospinal fluid; characterized in that it further comprises, A self-expanding support stent is disposed on the outside of the drainage tube. The expanded support stent supports the ventricular wall. A small protrusion is provided on the inside of the support stent. In the compressed state, the small protrusion is in close contact with the drainage tube. The support stent is made of absorbable material and covered with a membrane on the outside. Multiple mutually separated support stents are provided to support the ventricular wall at different locations after surgery. The support stent is used to prevent adhesion of the ventricles. A delivery tube, sleeved over the drainage tube and support frame, is used to keep the drainage tube and support frame in a compressed state to facilitate delivery to a designated location in the ventricle. A support bar is installed inside the compressed drainage tube. The support bar is flexible and made of metal. It is used to support the overall structure during the conveying process and, under the support of the support bar, delivers the drainage tube and support bracket compressed in the conveying tube to the drainage part. It also maintains the position of the drainage tube when the conveying tube is withdrawn. The support bar is blocked at the first end of the drainage tube. The drainage tube and the support stent are kept in a compressed state inside the delivery tube and are delivered to the ventricle using the support bar. After being delivered to the accurate position, the position of the drainage tube is maintained by the support bar. The delivery tube is then withdrawn. During the withdrawal process, the position of the support stent and the drainage tube does not change due to the contact friction between the small protrusion on the inner side of the support stent and the drainage tube. The withdrawal of the delivery tube exposes the support stent, which then expands outward along the longitudinal axis perpendicular to the support bar.

2. The ventricular support drainage device according to claim 1, characterized in that, The length of a single support bracket ranges from 5 to 10 mm; the distance between any two adjacent support brackets is controlled between 3 and 8 mm.

3. The ventricular support drainage device according to claim 1, characterized in that, Drainage holes are provided on the sidewall of the drainage tube area covered by the support bracket, and the drainage holes are evenly distributed around the circumference of the drainage tube.

4. The ventricular support drainage device according to claim 1, characterized in that, The diameter of the drainage hole is 0.5-2mm.

5. The ventricular support and drainage device according to claim 1, characterized in that, Three rows of drainage holes are set along the longitudinal axis of the drainage tube, and the distance between adjacent drainage holes in each row is 5-10mm.

6. The ventricular support drainage device according to claim 2, characterized in that, A connecting line is installed between the drainage tube and the support bracket to maintain the relative positional relationship between the support bracket and the drainage tube when the support bracket expands; The number of connecting wires is 6-16, evenly distributed between the support bracket and the drainage tube, so as to achieve balanced traction and positioning of the drainage tube.

7. The ventricular support and drainage device according to claim 1, characterized in that, A hemispherical structure is provided at the first end of the drainage tube.

8. The ventricular support and drainage device according to claim 1, characterized in that, The drainage tube includes an implanted segment with a length ranging from 8 to 10 cm, the delivery tube is located outside the implanted segment, and the length of the support strip is greater than or equal to the length of two implanted segments; Alternatively, a longitudinal opening can be provided through the delivery tube, the support bar length can be greater than or equal to the length of one implantation segment, the delivery tube can be elastic so that it can separate from the support bar through the longitudinal opening during the delivery process, and the curvature of the longitudinal opening under the cross-section is less than 5°.

9. The ventricular support and drainage device according to claim 1, characterized in that, The inner diameter of the drainage tube ranges from 3 to 5 mm, and the outer diameter ranges from 4 to 6 mm, while the outer diameter of the support bracket ranges from 7 to 10 mm.

10. The ventricular support drainage device according to claim 1, characterized in that, A drug delivery tube is installed on the inner wall of the drainage tube. The inner diameter of the drug delivery tube is 0.1-0.2 mm, and the length of the drug delivery tube is 10-15 cm.

11. The ventricular support and drainage device according to claim 10, characterized in that, The drug delivery tube is integrally connected to the drainage tube, and a row of drug application holes is provided on the side wall of the drainage tube along the longitudinal axis of the drainage tube, with the drug application holes opening from the side wall of the drainage tube toward the drug delivery tube.

12. The ventricular support and drainage device according to claim 11, characterized in that, The diameter of the drug application holes ranges from 0.05 to 0.1 mm and is evenly distributed along the longitudinal axis of the drainage tube.

13. The ventricular support and drainage device according to claim 11, characterized in that, The drug delivery tube also includes an extension section on the outside of the drainage tube, with a connector on the extension section for connecting to the injection head of a microsyringe.

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