A watertight suture patch for artificial dura mater

Abstract

The utility model discloses a watertight suture repair piece of artificial cerebral membrane in the technical field of artificial cerebral membrane, including the blocking piece, watertight septum and locking piece, the blocking piece, watertight septum and locking piece are all flexible cerebral membrane repair piece, watertight septum is vertically set in the joint of blocking piece and extension piece, the blocking piece and watertight septum are closed in operation, and the extension piece is extended to the intracranial in the incision of skull and is closed in extension, avoids the leakage of cerebrospinal fluid from the skull incision, the device not only reinforces in the bottom layer of cerebral membrane, also increases the sealing structure at the joint of skull, and also covers the outer sealing piece above the skull, to seal the outside of skull joint, effectively reaches the postoperative water effect, and simple operation increases the locking piece, can make artificial cerebral membrane and the original cerebral membrane of patient adhere stably, increases the probability of operation success.

Description

Technical Field

[0001] This utility model relates to the field of artificial meninges technology, and in particular to a watertight suture repair patch for artificial meninges. Background Technology

[0002] Artificial dura mater is a medical material used to repair or replace damaged dura mater, commonly used in neurosurgery. Its core functions include protecting brain tissue, preventing cerebrospinal fluid leakage, and reducing postoperative adhesions. Based on the material's origin, it can be divided into biological (e.g., animal-derived) and synthetic (e.g., absorbable polymers), each with its own characteristics. Selection must be based on the individual patient's condition and surgical requirements.

[0003] Among them, biological artificial dura mater is mostly made from animal tissues such as bovine pericardium and porcine peritoneum. It has good biocompatibility, high similarity to human tissue, and can promote the growth of autologous cells. Some materials can be gradually replaced by autologous tissue.

[0004] Synthetic artificial dura mater is a dura mater that is artificially synthesized. It is a chemical material that cannot be absorbed, but it has a low risk of infection.

[0005] In craniotomy, some patients require the removal of the dura mater or diseased meninges and replacement with an artificial dura mater. This dura mater removal surgery involves opening the skull and suturing the artificial dura mater to the dura mater beneath the skull. The dura mater needs to provide a seal to prevent cerebrospinal fluid leakage. However, during surgery, the dura mater attached to the inner wall of the skull may have gaps, especially near the edge of the skull incision where the dura mater is cut. These gaps are difficult to suture and can easily lead to leakage or difficulty in sealing, which can negatively impact the surgical outcome.

[0006] Based on this, the present invention designs a watertight suture repair patch for artificial meninges to solve the above problems. Utility Model Content

[0007] The purpose of this invention is to provide a watertight suture repair patch for artificial meninges, which can fit and seal the dura mater incision during surgery. The extension patch also extends to seal the skull incision, preventing cerebrospinal fluid leakage. This device not only reinforces the bottom layer of the meninges but also adds a sealing structure at the skull suture joints. Additionally, an outer sealing patch covers the top of the skull to seal the outer side of the skull sutures, effectively achieving postoperative watertightness. It is simple to operate and includes a locking patch to ensure stable adhesion between the artificial meninges and the patient's original meninges, increasing the chances of surgical success.

[0008] This invention is achieved as follows: a watertight suture repair patch for artificial meninges, comprising:

[0009] Sealing plates, watertight seals, and locking plates;

[0010] The retaining sheet, watertight septum, and locking sheet are all flexible meningeal repair sheets. An extension sheet is provided on the inner side of the retaining sheet. The retaining sheet and the extension sheet are connected in the same plane to form a complete sheet structure. The retaining sheet and the opening of the dura mater are sutured and sealed to form an integral structure.

[0011] The watertight partition is disposed at the joint between the baffle and the extension piece, and the watertight partition extends vertically upward at the top of the baffle.

[0012] The top of the watertight partition is also provided with an outer sealing plate, which is arranged parallel to the top of the extension plate;

[0013] The locking plate is a rigid flat plate with multiple locking holes evenly distributed on it. The locking plate is sandwiched inside the watertight partition.

[0014] The sealing plate, watertight partition, and locking plate form an integral structure;

[0015] A locking pin is installed inside the keyhole, and the locking plate is locked to the cut surface of the skull by the locking pin.

[0016] Furthermore, the sealing sheet is a collagen membrane meningeal patch;

[0017] The extension patch is a biological meningeal patch;

[0018] The length d of the extension piece extending into the cranium is greater than the length s of the outer cover piece;

[0019] The extension length d of the extension piece is 7-14 mm.

[0020] Furthermore, the width c in the left and right directions of the sealing sheet, the watertight partition, and the extension sheet are all the same;

[0021] The baffle plate is square.

[0022] Furthermore, the thickness of the watertight partition is 3-7 mm.

[0023] Furthermore, the locking pin is a medical bone nail.

[0024] Furthermore, the locking piece is a titanium alloy piece, and the width of the locking piece in the left-right direction is less than the width c of the watertight partition, and the difference is no more than 8mm.

[0025] The beneficial effects of this utility model are: 1. This utility model adds a sealing sheet, which can cover and suture the dura mater of the brain, thereby reinforcing the surgically cut dura mater. It also adds an extension sheet, which can supplement the dura mater along the edge of the skull incision, ensuring water tightness and preventing cerebrospinal fluid from leaking from the gaps along the edge of the dura mater. The sealing effect is better. Moreover, the extension sheet and the sealing sheet will gradually grow and heal with the original dura mater of the human body after the operation, making its sealing performance better and making the dura mater closer to the preoperative state after healing.

[0026] 2. This device also includes a watertight septum and an outer sealing plate. The watertight septum, the sealing plate, and the extension plate are integrated as a whole, standing upright at the top. This effectively seals the subsequent cranial bone splicing and healing, thus supplementing and sealing the gaps lost during cranial bone cutting without hindering the cranial bone splicing. The outer sealing plate is then attached to the outside of the cranium, creating a double-layer seal that further seals the cranial bone gaps, effectively improving the watertightness of cerebrospinal fluid in the cranium after the entire surgery.

[0027] 3. At the same time, a locking plate is added. The locking plate can fix the watertight partition in the inner layer, ensuring that the watertight partition always remains in a fixed position and will not be twisted or moved due to subsequent operations and healing. In addition, the locking plate is made of titanium alloy, which is tough and can stably position the watertight partition. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] Figure 1 This is a schematic diagram of the suture position structure of the present invention on the human skull and dura mater;

[0030] Figure 2 This is a schematic diagram of the overall unfolded structure of this utility model;

[0031] Figure 3 This is a schematic diagram of the structure of the watertight partition and the baffle plate of this utility model;

[0032] Figure 4 This is a schematic diagram of the overall side structure of this utility model.

[0033] The attached diagram lists the components represented by each number as follows:

[0034] 1-Blocking sheet, 11-Extension sheet, 2-Watertight partition sheet, 21-Outer sealing sheet, 3-Locking sheet, 31-Keyhole, 32-Locking pin, 4-Skull, 41-Dura mater. Detailed Implementation

[0035] Please see Figures 1 to 4As shown, this utility model provides a watertight suture repair patch for artificial meninges. To better understand the above technical solution, the following will describe the above technical solution in detail with reference to the accompanying drawings and specific embodiments.

[0036] In a specific embodiment of the technical solution of this utility model:

[0037] Includes a sealing plate 1, a watertight partition 2, and a locking plate 3;

[0038] The sealing sheet 1, the watertight septum 2, and the locking sheet 3 are all flexible meningeal repair sheets. An extension sheet 11 is provided on the inner side of the sealing sheet 1. The sealing sheet 1 and the extension sheet 11 are connected in the same plane to form a complete sheet structure. The sealing sheet 1 and the opening of the dura mater 41 are sutured and sealed to form an integral structure.

[0039] The sealing patch 1 is a collagen membrane meningeal patch, which can also heal with the human body, but this material has better waterproofing and leak-proof suture properties. It also has higher compressive strength.

[0040] The extension patch 11 is a biological meningeal patch that can eventually grow together with the original dura mater 41 to form an integral dura mater. The extension length d of the extension patch 11 into the cranium is greater than the extension length s of the outer cover patch 21. The extension length d of the extension patch 11 is 7-14 mm.

[0041] The width c in the left and right directions of the baffle plate 1, the watertight partition plate 2, and the extension plate 11 are all the same;

[0042] The baffle plate 1 is square, and there are multiple replacement parts of different sizes for the baffle plate 1. The side length of the baffle plate 1 is 5cm, 7cm and 10cm, which is convenient for use with different sizes of openings of the dura mater 41. It can also be cut into different sizes for use as needed.

[0043] The watertight partition 2 is disposed at the joint between the baffle plate 1 and the extension plate 11, and the watertight partition 2 extends vertically upward at the top of the baffle plate 1;

[0044] The top of the watertight septum 2 is also provided with an outer sealing piece 21, which is set parallel to the extension piece 11 directly above it. The thickness of the watertight septum 2 is 3-7mm, preferably 5mm, which can provide a more effective sealing effect for the healing of bone surgery without hindering the splicing of the skull 4.

[0045] Locking plate 3 is a rigid flat plate, and locking plate 3 is a titanium alloy plate. The width of locking plate 3 in the left and right direction is less than the width c of watertight partition 2, and the difference is not more than 8mm. The vertical height of locking plate 3 is less than the thickness of skull 4, generally within 5mm. If the size does not conform to the thickness of skull 4, locking plate 3 can be trimmed to the appropriate size and shape during surgery using surgical scissors.

[0046] Multiple locking holes 31 are evenly opened on the locking plate 3. The locking plate 3 is sandwiched inside the watertight partition 2 to form a sandwich structure. The locking plate 3 forms a skeleton, while the watertight partition 2 forms an outer wrapping layer.

[0047] The watertight partition 2 is wrapped around the locking piece 3. The watertight partition 2 has two layers and is a sandwich structure. The outer layer of the watertight partition 2 can be flipped open to expose the inner layer of the watertight partition 2 and the locking piece 3. The inner side of the watertight partition 2 is attached to the cross-section of the skull 4, while the outer layer of the watertight partition 2 covers the outside of the locking piece 3. This allows both sides of the skull 4 to be in close contact and sealed with the watertight partition 2, while the locking piece 3 forms a skeleton to fix and lock the watertight partition 2.

[0048] The watertight partition 2 is an artificial meningeal layer with a semi-transparent effect, allowing the locking plate 3 and keyhole 31 inside the watertight partition 2 to be clearly seen.

[0049] The sealing plate 1, the watertight partition plate 2, and the locking plate 3 form an integral structure;

[0050] A locking pin 32, which is a medical bone nail, is installed inside the keyhole 31. The locking plate 3 is locked to the cross-section of the skull 4 by the locking pin 32. Therefore, the locking pin 32 needs to pass through the outer layer of the watertight partition 2 and the keyhole 31 of the locking plate 3 from the outside to the inside, and then pass through the inner layer of the watertight partition 2 and be nailed into the cross-section of the skull 4, so as to lock the watertight partition 2.

[0051] It should be noted that:

[0052] 1. This type of dura mater resection surgery requires first cutting open the skull bone 4, which is about 1 cm thick and is one of the hardest bones in the human body. A great deal of force is needed to cut it. The dura mater 41 is tightly attached to the skull bone 4, making it prone to tearing during the incision. After the surgery, any irregular tears need to be repaired and sealed. Generally, the exposed incision is a neat and straight surgical incision, with the dura mater 41 exposed on three sides of the incision outside the skull bone 4 during the surgery, facilitating subsequent suturing. The tear caused by cutting the skull bone 4 will overlap with or even disappear from the skull bone incision. The incision of the dura mater 41, which extends irregularly in a serrated shape inside the skull 4, is difficult to close during surgery. This device eliminates the need for sutures. The extension piece 11 is used to directly adhere and close the dura mater 41 that has been torn along the skull 4, and it is connected to the sealing piece 1 to form a whole. Then, it is sutured to the incision of the dura mater 41 to achieve a sealing effect. At the same time, a watertight septum 2 is added to the incision of the skull 4 to ensure that the dura mater 41 and the extension piece 11 at the damaged site are completely sealed to the skull 4, achieving a postoperative sealing effect.

[0053] 2. Existing artificial dura mater requires suturing to the body's original dura mater. The suturing operation requires full-edge suturing and must maintain a tight seal. This operation is difficult at the skull 4 incision site. Therefore, the only option is to place an artificial dura mater at the dura mater 41 at the fissure for sealing. Without suturing, it is difficult to withstand intracranial pressure and there is a risk of leakage. This device adds a watertight septum 2 to form a side seal of a certain thickness. A locking piece 3 is then added to seal the watertight septum 2, forming a triple-layered sealed structure. Furthermore, the locking piece 3 is a thin titanium alloy sheet. Titanium alloy is a human-safe metal that will not have any abnormal effects on the human body. It is tough and does not rust. It can be made into a very thin structure. It is tough and can be bent and extended to fit the shape of the skull opening. Moreover, it can be cut on-site to fit the shape of the skull 4 incision and can also be effectively positioned. It is currently the optimal solution for this environment.

[0054] In the procedure of closing the dura mater 41 at the opening of the skull 4, the present invention first removes the sealing sheet 11, selects a suitable size, generally a square thin sheet with a side length of 5 or 7 cm and a thickness of no more than 2 mm. The device stretches and unfolds the sealing sheet 1 to form an arc surface with the same shape as the dura mater 41, and inserts the sealing sheet 1 into the inside of the dura mater 41 so that it fits closely. The sealing sheet 1 and the dura mater 41 can be sutured together according to the actual situation.

[0055] The extension piece 11 is also inserted into the dura mater 41 below the tear where it overlaps with the skull 41. Since the area below the skull 41 cannot be sutured, the extension piece 11 is also attached to the dura mater 41 at the tear. The extension piece 11 of this device does not require suturing, and the tear in the dura mater 11 can be sealed and attached through the extension piece 11.

[0056] The watertight septum 2 is attached to the incision section of the skull 4, and then the locking piece 3 and the locking piece 32 are used to lock the locking piece 3 and the watertight septum 2 to the incision section of the skull 4, thereby locking the watertight septum 2 to the skull 4, so that the watertight septum 2 can tightly seal the gap between the skull suture and the dura mater 41.

[0057] The outer sealing piece 21 extends outside the skull 4, sealing the skull from the outside and forming a completely sealed blockage at the rupture site of the dura mater 41, thereby sealing all edges of the dura mater 41 in all directions. This device simplifies this type of craniotomy and has a good sealing effect. The outer sealing piece 21 is also flexible and can be easily bent and fitted to the outside of the skull 4 for sealing.

[0058] The term "inner" in this device refers to the intracranial cavity, and "outer" refers to the extracranial cavity. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0059] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A watertight suture repair patch for artificial meninges, characterized in that, include: A sealing plate (1), a watertight partition (2), and a locking plate (3); The sealing sheet (1), watertight septum (2), and locking sheet (3) are all flexible meningeal repair sheets. An extension sheet (11) is provided on the inner side of the sealing sheet (1). The sealing sheet (1) and the extension sheet (11) are connected in the same plane to form a complete sheet structure. The opening of the sealing sheet (1) and the dura mater (41) are sutured and sealed to form an integral structure. The watertight partition (2) is disposed at the joint between the baffle plate (1) and the extension plate (11), and the watertight partition (2) extends vertically upward at the top of the baffle plate (1); The top of the watertight partition (2) is also provided with an outer sealing piece (21), which is arranged parallel to the top of the extension piece (11); The locking plate (3) is a hard plate, and multiple locking holes (31) are evenly opened on the locking plate (3). The locking plate (3) is sandwiched inside the watertight partition (2). The sealing plate (1), the watertight partition plate (2), and the locking plate (3) form an integral structure; The watertight septum (2) and locking plate (3) are locked to the cross-section of the skull (4) by locking pins (32).

2. The watertight suture repair patch for artificial meninges according to claim 1, characterized in that: The sealing sheet (1) is a collagen membrane meningeal patch; The extension patch (11) is a biological meningeal patch; The extension length d of the extension piece (11) into the cranium is greater than the extension length s of the outer cover piece (21); The extension length d of the extension piece (11) is 7-14 mm.

3. The watertight suture repair patch for artificial meninges according to claim 1, characterized in that: The width c in the left and right directions of the baffle plate (1), the watertight partition plate (2) and the extension plate (11) are all the same; The baffle plate (1) is square.

4. The watertight suture repair patch for artificial meninges according to claim 1, characterized in that: The thickness of the watertight septum (2) is 3-7 mm.

5. The watertight suture repair patch for artificial meninges according to claim 1, characterized in that: The locking pin (32) is a medical bone nail.

6. The watertight suture repair patch for artificial meninges according to claim 2, characterized in that: The locking piece (3) is a titanium alloy piece, and the width of the locking piece (3) in the left and right directions is less than the width c of the watertight partition (2), and the difference is no more than 8mm.

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