Skull plug for fixing drainage tube

Abstract

The invention relates to a skull plug for fixing a drainage tube, which comprises an external member and an embedded member mounted in the external member, and the embedded member is provided with a channel for the drainage tube to pass through; the embedded part comprises an upper disc, a lower disc and at least two clamping wires connected with the upper disc and the lower disc, and the clamping wires are used for fixing the drainage tube; the upper disc is located at the upper end of the sleeve and can rotate relative to the sleeve, and the lower disc is fixedly connected with the lower end of the sleeve. According to the skull plug, by rotating the upper disc of the embedded part, the minimum distance between the clamping line and the central axis of the embedded part can be gradually decreased, and therefore drainage tubes with different diameters can be fixed; in addition, the tissue cannot be wounded in the process of installing and taking out the drainage tube, the operation is simple, and the use is convenient.

Description

Technical Field

[0001] The present invention relates to the field of medical instruments, and more particularly to a skull plug for fixing a drainage tube. Background Art

[0002] In the field of neurosurgery, in order to treat specific brain diseases such as subdural hematoma, subdural effusion, ventriculitis, etc., it is necessary to insert a drainage tube or catheter through the skin and skull to absorb and remove blood or cerebrospinal fluid. Clinically, sutures or patches are usually used to fix the drainage tube, which can easily cause trauma to the tissue, and the installation and removal process is inconvenient to operate. In daily life, it is also easy to cause the loosening or movement of the fixed structure, resulting in the slippage and displacement of the drainage tube. Therefore, the development of a product that is easy to operate and can stably fix the drainage tube is widely needed and of great significance in clinical practice.

[0003] CN220695659U discloses a drainage tube fixing device, including an embedded tube for the drainage tube to penetrate, the embedded tube is used to be inserted into the cranial hole of the skull, the peripheral wall of the embedded tube is fixed with a plurality of connecting plates arranged along the radial direction of the embedded tube, a fixing mechanism is provided between the connecting plate and the skull, and the connecting plate and the skull are fixed by the fixing mechanism, thereby improving the stability of the embedded tube, and since the drainage tube is inserted into the skull through the embedded tube, the shaking of the drainage tube can be prevented, and the accuracy of the drainage tube fixation is improved. However, the inner diameter of the plug hole in the embedded tube in the patent is adapted to the diameter of the drainage tube, and can only be applied to drainage tubes of a specific diameter, and cannot be applied to drainage tubes of different diameters, which limits its scope of use. Summary of the invention

[0004] In order to overcome the above technical problems, the present invention provides a skull plug for fixing a drainage tube, which can be suitable for fixing drainage tubes of different diameters.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a skull plug for fixing a drainage tube, comprising a set and an insert installed in the set, wherein the insert is provided with a channel for the drainage tube to pass through; the insert comprises an upper plate, a lower plate and at least two clamping wires connecting the upper plate and the lower plate, wherein the clamping wires are used to fix the drainage tube; the upper plate is located at the upper end of the set and can rotate relative to the set, and the lower plate is fixedly connected to the lower end of the set;

[0006] By rotating the upper plate relative to the sleeve, the minimum distance between the clamping line and the central axis of the embedded component can be gradually reduced, thereby fixing the drainage tube.

[0007] In the above technical solution, when in use, the kit is inserted into the cranial hole to be blocked and fixed on the skull, the insert is installed in the kit, and the drainage tube passes through the channel in the insert and then extends into the skull. When the drainage tube is to be fixed, the upper plate is rotated to rotate the upper plate relative to the kit, so that the minimum distance between the clamping line and the central axis of the insert gradually decreases until the clamping line clamps and fixes the drainage tube. Since the minimum distance between the clamping line and the central axis of the insert has a certain range of variation, drainage tubes of different diameters can be clamped and fixed, which is convenient for clinical application.

[0008] Furthermore, the upper plate and the lower plate are both provided with through holes, and the through holes and the area surrounded by the plurality of clamping lines form a channel for the drainage tube to pass through.

[0009] Furthermore, the kit is provided with a cavity penetrating the kit along the axial direction, a first accommodating cavity is provided at one end of the cavity, and a second accommodating cavity is provided at the other end of the cavity; the upper plate is located in the first accommodating cavity and can rotate relative to the kit, and the upper plate is provided with a first limiting portion, and the first limiting portion is used to limit the position of the upper plate in the first accommodating cavity; the lower plate is located in the second accommodating cavity and is fixedly connected with respect to the circumferential direction of the kit; further, the lower plate is detachably connected to the kit, and the lower plate is provided with a second limiting portion, and the second limiting portion is used to limit the rotation of the lower plate in the second accommodating cavity.

[0010] Among them, the first limiting portion can be a protrusion or a depression arranged on the upper plate, and a corresponding plurality of limiting points can be arranged in the first accommodating cavity, such as a protrusion corresponding to a depression, and a depression corresponding to a protrusion. During the rotation of the upper plate, the first limiting portion matches with different limiting points and is fixed in the limiting points, so as to limit the upper plate to different circumferential positions in the first accommodating cavity, so that the upper plate cannot move relative to the kit without external force. The second limiting portion can be a protrusion or a depression arranged on the lower plate, and a corresponding depression or a protrusion can be arranged in the second accommodating cavity. When the upper plate rotates, the second limiting portion remains stationary in the second accommodating cavity. The second limiting portion can also be other fixedly connected components such as fasteners, but this form will affect the disassembly efficiency of the embedded components.

[0011] Furthermore, the initial length of the clamping line is greater than or equal to the distance between the upper plate and the lower plate, which can make the minimum distance between the clamping line and the central axis of the embedded component vary more. The initial length refers to the length of the clamping line when the connection point of the clamping line with the upper plate and the connection point with the lower plate are in the same vertical line. The clamping line itself has a certain amount of elastic deformation, so even if the initial length of the clamping line is equal to the distance between the upper plate and the lower plate, when the upper plate rotates, the minimum distance between the clamping line and the central axis of the embedded component can gradually decrease, but the decrease will be insufficient, and the diameter range of the drainage tube that can be clamped and fixed is also relatively narrow. The distance between the upper plate and the lower plate refers to the straight-line distance between the upper plate and the lower plate when the embedded component is installed in the kit.

[0012] Furthermore, the cross section of the clamping wire is circular, and the breaking elongation of the clamping wire is greater than 10%; and / or the clamping wire is made of polyetheretherketone material. When the breaking elongation of the clamping wire is greater than 10%, the minimum distance between the clamping wire and the central axis of the embedded component can be changed more widely, thereby fixing drainage tubes with a larger diameter range. Polyetheretherketone material has good mechanical properties, good toughness and impact resistance, can still maintain good integrity and stability when subjected to complex stress, and has good biocompatibility.

[0013] Furthermore, the clamping lines are evenly distributed along the circumference of the upper plate; and / or, a plurality of protrusions are provided in the middle section of the clamping lines. The clamping lines can provide the drainage tube with multiple and uniform force points in the circumferential direction, and can better clamp and fix the drainage tube. The protrusions can increase the friction between the contact position of the clamping line and the drainage tube, improve its clamping and fixing effect on the drainage tube, and prevent the drainage tube from sliding in the channel.

[0014] Furthermore, the first limiting part is a ratchet, and the kit is provided with a plurality of circumferentially distributed recessed parts that fit the shape of the ratchet at the first accommodating cavity. After the upper plate is rotated and the drainage tube is clamped under external force, the ratchet can ensure that the upper plate will not rotate in the opposite direction without external force during use, causing the drainage tube to loosen.

[0015] Furthermore, the inner side surface of the recessed portion includes a limiting surface for limiting the reverse rotation of the pawl and a catering surface for allowing the pawl to rotate forward, and the angle between the limiting surface and the inner contour surface of the first accommodating cavity is 100°-120°, and the angle between the catering surface and the inner contour surface of the first accommodating cavity is 140°-160°.

[0016] Furthermore, the upper plate is provided with an abutment portion, the first accommodating cavity is provided with a supporting portion, and the bottom surface of the abutment portion is in contact with the top surface of the supporting portion. The supporting portion can always maintain a supporting and limiting state for the abutment member, and when the upper plate is rotated, even if the first limiting portion is located between two limiting points, the supporting portion can ensure that the upper plate will not fall.

[0017] Furthermore, a rotation scale line is provided on the side of the upper plate, and the first limiting portion is located at the scale line.

[0018] Furthermore, a tool connection groove for inserting a tool is provided on the top surface of the upper plate. The embedded part is installed in the kit, and the tool is inserted through the tool connection groove, which is convenient for operating the upper plate to rotate.

[0019] Furthermore, the kit includes a plug cap and a sleeve portion located below the plug cap, and a plurality of nail holes for bone screw fixation are arranged on the edge of the plug cap away from the sleeve. After the kit is inserted into the cranial hole to be blocked, the lower end surface of the plug cap abuts against the outer surface of the skull, which can avoid excessive insertion of the kit into the cranial hole, and the kit is fixed to the skull by passing the bone screws through the nail holes, thereby improving the stability of the kit. The plug cap and the sleeve can be integrally formed.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The skull plug for fixing the drainage tube of the present invention adopts the cooperation between the inner part and the sleeve. By rotating the upper plate of the inner part relative to the sleeve, the minimum distance between the clamping line and the central axis of the inner part gradually becomes smaller, and it can be suitable for fixing drainage tubes of different diameters. It is also simple to operate, and can quickly fix and remove the drainage tube. There is no need to use sutures or patches to fix the drainage tube on the scalp. No trauma is caused to the tissue during the installation and removal of the drainage tube, and it is convenient for use during surgery.

[0022] The skull plug for fixing a drainage tube of the present invention has a channel for the drainage tube to pass through provided on the skull plug. After the drainage treatment is completed, the skull plug can still be used to fill the bone hole after the drainage tube is taken out by rotating the upper plate, thereby avoiding the risk of exposure of the bone hole after the drainage tube is taken out and the need for a second operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a skull plug kit for fixing a drainage tube according to the present invention;

[0024] Figure 2 It is a structural schematic diagram of an embedded part of a skull plug for fixing a drainage tube according to the present invention;

[0025] Figure 3It is a schematic diagram of a skull plug kit for fixing a drainage tube according to the present invention combined with an upper plate;

[0026] Figure 4 It is a schematic diagram of the combination of the recessed portion of the set of skull plugs of the present invention and the first limiting portion of the upper plate;

[0027] Figure 5 It is a schematic diagram of the state of the clamping line changing during the rotation of the upper plate of the skull plug relative to the sleeve of the present invention;

[0028] Figure 6 It is a principle diagram of the changing state of the clamping line of the skull plug of the present invention.

[0029] In the figure:

[0030] 100-kit; 110-cavity; 120-first accommodating cavity; 130-second accommodating cavity; 140-recessed portion; 141-limiting surface; 142-meeting surface; 150-cap portion; 160-sleeve portion; 151-nail hole; 200-embedded part; 210-upper plate; 211-first limiting portion; 212-abutting portion; 213-tool connecting groove; 220-lower plate; 221-second limiting portion; 230-clamping line; 300-clamping area. DETAILED DESCRIPTION

[0031] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0032] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0033] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0034] Example 1

[0035] like Figure 1-6The present invention shows an embodiment 1 of a skull plug for fixing a drainage tube, comprising a set 100 and an insert 200 installed in the set 100, wherein the height of the insert 200 is less than or equal to the height of the set 100, and the insert 200 is provided with a channel for the drainage tube to pass through; the set 100 is provided with a cavity 110 penetrating the set 100 in the axial direction, a first accommodating cavity 120 is provided at one end of the cavity 110, and a second accommodating cavity 130 is provided at the other end of the cavity 110; the insert 200 is provided with a first accommodating cavity 120, and a second accommodating cavity 130 is provided at the other end of the cavity 110; 200 includes an upper plate 210, a lower plate 220 and a plurality of clamping wires 230 connecting the upper plate 210 and the lower plate 220, the clamping wires 230 being used to fix the drainage tube; the upper plate 210 is located in the first accommodating cavity 120 and can rotate relative to the sleeve 100, the upper plate 210 is provided with a first limiting portion 211, the first limiting portion 211 is used to limit the position of the upper plate 210 in the first accommodating cavity 120; the lower plate 220 is located in the second accommodating cavity 130 and is fixedly connected to the sleeve 100. Among them, the upper plate 210 and the lower plate 220 are both provided with through holes, and the area surrounded by the through holes and the plurality of clamping wires 230 forms a channel for the drainage tube to pass through.

[0036] In this embodiment, the upper plate 210 and the lower plate 220 are both through cylinders, and their outer diameters are adapted to the inner diameter of the sleeve 100, and are preferably slightly smaller than the inner diameter of the sleeve 100, so as to facilitate the rotation of the upper plate 210 relative to the sleeve 100.

[0037] In this embodiment, if Figure 3 As shown, the first limiting portion 211 is a ratchet, and the kit 100 is provided with a plurality of circumferentially distributed recessed portions 140 adapted to the ratchet at the first accommodating cavity 120, and the inner side surfaces of the recessed portions 140 are respectively a limiting surface 141 for limiting the reverse rotation of the ratchet and a contact surface 142 for allowing the ratchet to rotate forward. When the upper plate 210 is rotated under external force operation so that the clamping line 230 clamps and fixes the drainage tube, the ratchet can ensure that the upper plate 210 will not rotate in the reverse direction without external force during use, causing the drainage tube to loosen. Figure 4 As shown, the depth of the recessed portion 140 is 1 mm, the angle a between the limiting surface 141 and the inner contour surface of the first accommodating cavity 120 is 110°, and the angle b between the meeting surface 142 and the inner contour surface of the first accommodating cavity 120 is 150°.

[0038] In this embodiment, the kit 100 includes an integrally formed plug cap portion 150 and a sleeve portion 160 located below the plug cap portion 150, and a plurality of nail holes 151 for bone screw fixation are provided on the edge of the plug cap portion 150 away from the sleeve portion 160. The sleeve portion 160 has an outer diameter adapted to the cranial hole to be blocked, and the height of the sleeve portion 160 is consistent with the depth of the cranial hole to be blocked. The sleeve portion 160 is a round tube, the diameter of the plug cap portion 150 is greater than the outer diameter of the sleeve portion 160, and the upper end face and the lower end face of the plug cap portion 150 are both planes. The upper end face and / or the lower end face of the plug cap portion 150 can also adopt an arc surface design, etc., and are not limited to the illustrated embodiment. After the kit 100 is installed in the cranial hole to be blocked, the lower end surface of the plug cap 150 abuts against the outer surface of the skull, which can prevent the kit 100 from being over-inserted into the cranial hole. The kit 100 is fixed to the skull by means of bone screws passing through the nail holes 151, thereby improving the stability of the kit 100. Since the drainage tube needs to pass through the embedded parts in the kit 100 and extend into the skull, the stability of the drainage tube 102 can be ensured.

[0039] Among them, the initial length of the clamping line 230 is greater than or equal to the distance between the upper plate 210 and the lower plate 220, which can make the minimum distance between the clamping line 230 and the central axis of the embedded component 200 change more. The initial length refers to the length of the clamping line when the connection point of the clamping line with the upper plate and the connection point with the lower plate are in the same vertical line. The distance between the upper plate 210 and the lower plate 220 refers to the straight-line distance between the upper plate 210 and the lower plate 220 when the embedded component 200 is installed in the kit 100. The distance between the upper plate 210 and the lower plate 220 is 4mm-8mm, which can be reasonably set according to the thickness of the skull in actual conditions. In this embodiment, the distance between the upper plate 210 and the lower plate 220 is 4mm. The clamping wire 230 itself has a certain amount of elastic deformation, so even if the initial length of the clamping wire 230 is equal to the distance between the upper plate 210 and the lower plate 220, when the upper plate 210 rotates, the minimum distance between the clamping wire 230 and the central axis of the inner part 200 can gradually decrease, but the decrease will be insufficient, and the diameter range of the drainage tube that can be clamped and fixed is relatively narrow. In this embodiment, the cross section of the clamping wire 230 is circular, the breaking elongation of the clamping wire 230 is above 10%, and the material is polyetheretherketone, which can make the minimum distance between the clamping wire 230 and the central axis of the inner part 200 change more, thereby fixing drainage tubes with a larger diameter range.

[0040] Specifically, the clamping lines 230 are evenly distributed along the circumference of the upper plate 210. The clamping lines 230 can provide the drainage tube with multiple and uniform force points in the circumferential direction, which can better clamp and fix the drainage tube. The number of clamping lines 230 is 7-16. The number of clamping lines 230 can be reasonably set according to the actual situation and the circumference of the upper plate 210 and the lower plate 220.

[0041] In addition, the upper plate 210 is provided with a tool connection slot 213 for inserting a tool. The insert 200 is installed in the kit 100, and a tool is inserted through the tool connection slot 213, so as to facilitate the operation of the upper plate 210 to rotate.

[0042] The working principle of this embodiment:

[0043] Insert the kit 100 into the cranial hole to be blocked, and fix the kit 100 on the skull by passing the bone screw through the nail hole 151. The insert 200 is installed in the kit 100, and the drainage tube passes through the through hole of the upper plate 210, the cavity 110 and the through hole of the lower plate 220 and then extends into the skull, and the lower end surface of the cap 150 abuts against the outer surface of the skull. When the drainage tube is to be fixed, since the lower plate 220 will not rotate in the kit 100, the upper plate 210 is rotated so that it rotates relative to the lower plate 220 and the kit 100. When the upper plate 210 rotates, the state of the clamping line 230 changes as shown in FIG. Figure 5 shown. Figure 5 A in the figure is a schematic diagram of the state before the upper plate 210 rotates, and the initial length of the clamping line 230 is greater than the distance between the upper plate 210 and the lower plate 220, so it is in a relaxed state, and the drainage tube is not fixed at this time; Figure 5 B in the figure is the case where the clamping line 230 is just straightened. At this time, all the points with the minimum distance between the clamping line 230 and the central axis of the insert 200 form a clamping area 300. At this time, the clamping area 300 is in the state of maximum diameter and can fix the drainage tube with the maximum diameter. Figure 5 C in the figure is the case where the clamping line 230 is in the maximum stretched state, at which time the clamping area 300 is in the smallest diameter state, and can fix the drainage tube with the smallest diameter. As the upper plate 210 rotates, the clamping line 230 can put the clamping area 300 in different states, thereby fixing drainage tubes with different diameters.

[0044] The specific variation principle of the clamping line 230 can be seen in Figure 6, the straight-line distance between the upper plate 210 and the lower plate 220 is L1, and the initial length of the clamping line 230 is L2. When the upper plate 210 is equivalent to the rotation of the set 100, the straight-line distance between the connection position B of the clamping line 230 and the upper plate 210 after rotation and the position A before rotation is A-1. At this time, the diameter of the clamping area 300 formed by the clamping line 230 is φ1-1, and the outer diameter of the corresponding clamped drainage tube is φ2-1. The upper plate 210 continues to rotate, and the straight-line distance between the connection position C of the clamping line 230 and the upper plate 210 after rotation and the position A before rotation is A-2. At this time, the diameter of the clamping area 300 formed by the clamping line 230 is φ1-2, and the outer diameter of the corresponding clamped drainage tube is φ2-2. During the process of the clamping wire 230 clamping and fixing the drainage tube, since the drainage tube is made of rubber, which is softer than the clamping wire 230 made of polyetheretherketone, the drainage tube will deform before the clamping wire 230 and will be clamped and fixed by the clamping wire 230 .

[0045] The outer diameter of the drainage tube commonly used in clinical practice ranges from 2.9 mm to 4.7 mm. In actual situations, the linear distance of rotation of the upper plate 210 can be calculated according to the outer diameter range of the drainage tube that needs to be fixed, and then a ratchet is set at the corresponding position of the upper plate 210, and a recessed portion 140 adapted to the ratchet is set in the first accommodating cavity 120.

[0046] The beneficial effects of this embodiment are as follows: the kit 100 is inserted into the cranial hole to be blocked and fixed on the skull. After the drainage tube passes through the embedded component 200 installed in the kit 100, the upper plate 210 is rotated relative to the kit 100, so that the minimum distance between the clamping line 230 and the central axis of the embedded component 200 gradually decreases, that is, the diameter of the clamping area 300 gradually decreases, thereby enabling the fixation of drainage tubes of different diameters; when the drainage tube needs to be removed after the drainage treatment is completed, the upper plate 210 is rotated in the opposite direction by applying external force, so that the clamping line 230 can be restored to the initial state or the state where the drainage tube is no longer clamped, and the drainage tube can be removed at this time. It can be seen that the skull plug for fixing the drainage tube of the present invention will not cause trauma to the tissue during the installation and removal of the drainage tube, and is simple to operate and convenient for use during surgery. In addition, after the drainage tube is removed, the skull plug can still be used to fill the bone hole, avoiding the exposure of the bone hole after the drainage tube is removed and the risk of requiring a secondary operation.

[0047] Example 2

[0048] Embodiment 2 of a skull plug for fixing a drainage tube is based on embodiment 1 and differs from embodiment 1 in that: Figure 2As shown, the upper plate 210 is provided with an abutting portion 212, and a supporting portion is provided in the first accommodating cavity 120, and the bottom surface of the abutting portion 212 is in contact with the top surface of the supporting portion. The supporting portion can always maintain a supporting and limiting state for the abutting portion 212, and when the upper plate 210 is rotated, even if the first limiting portion 211 is located between two limiting points, the supporting portion can ensure that the upper plate 210 will not fall.

[0049] The abutment portion 212 and the supporting portion can have various states. For example, the abutment portion 212 can be set as an external thread arranged along the outer peripheral side of the upper plate 210, and the supporting portion can be set as an internal thread located in the first accommodating cavity 120 and matched with the external thread; in addition, the abutment portion 212 can also be a protrusion, and the supporting portion is a groove matched with the protrusion.

[0050] In this embodiment, the middle section of the clamping line 230 is provided with a plurality of protrusions to increase the friction between the contact position of the clamping line 230 and the drainage tube, thereby improving the clamping and fixing effect on the drainage tube and preventing the drainage tube from sliding in the channel.

[0051] In this embodiment, a rotation scale line is provided on the side of the upper plate 210, and the first limit portion 211 is located at the scale line.

[0052] The rest of the working principles and effects of this embodiment are consistent with those of Embodiment 1.

[0053] Example 3

[0054] Embodiment 3 of a skull plug for fixing a drainage tube is based on embodiment 1 or embodiment 2, and differs in that: Figure 2 As shown, the lower plate 220 is provided with a second limiting portion 221 , and the second limiting portion 221 is used to limit the lower plate 220 from rotating in the second accommodating cavity 130 .

[0055] In an embodiment, the second limiting portion 221 is a plurality of protrusions arranged on the outer side of the lower plate 220, and the kit 100 is provided with a groove matching the protrusion at the second accommodating cavity 130, and the second limiting portion 221 is installed in the groove to limit the rotation of the lower plate 220 relative to the kit 100.

[0056] Other technical features, working principles and effects of this embodiment are consistent with those of Embodiment 1 or Embodiment 2.

[0057] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A skull plug for fixing a drainage tube, characterized in that: The skull plug comprises a set (100) and an inlay (200) installed in the set (100), wherein the inlay (200) is provided with a channel for a drainage tube to pass through; the inlay (200) comprises an upper plate (210), a lower plate (220) and a plurality of clamping wires (230) connecting the upper plate (210) and the lower plate (220), wherein the clamping wires (230) are used to fix the drainage tube; the upper plate (210) is located at the upper end of the set (100) and can rotate relative to the set (100), and the lower plate (220) is fixedly connected to the lower end of the set (100); By rotating the upper plate (210) relative to the kit (100), the minimum distance between the clamping line (230) and the central axis of the embedded component (200) can be gradually reduced, thereby fixing the drainage tube.

2. The skull plug for fixing a drainage tube according to claim 1, characterized in that: The upper plate (210) and the lower plate (220) are both provided with through holes, and the through holes and the area enclosed by the plurality of clamping lines (230) form a channel for the drainage tube to pass through.

3. The skull plug for fixing a drainage tube according to claim 1, characterized in that: The kit (100) is provided with a cavity (110) penetrating the kit (100) along the axial direction; a first accommodating cavity (120) is provided at one end of the cavity (110); and a second accommodating cavity (130) is provided at the other end of the cavity (110); the upper plate (210) is located in the first accommodating cavity (120) and can rotate relative to the kit (100); the upper plate (210) is provided with a first limiting portion (211), and the first limiting portion (211) is used to limit the position of the upper plate (210) in the first accommodating cavity (120); the lower plate (220) is located in the second accommodating cavity (130) and is fixedly connected to the kit (100); Preferably, the lower plate (220) is detachably connected to the kit (100), and the lower plate (220) is provided with a second limiting portion (221), and the second limiting portion (221) is used to limit the rotation of the lower plate (220) in the second accommodating cavity (130).

4. The skull plug for fixing a drainage tube according to claim 1, characterized in that: The initial length of the clamping line (230) is greater than or equal to the distance between the upper plate (210) and the lower plate (220).

5. The skull plug for fixing a drainage tube according to claim 1, characterized in that: The cross section of the clamping wire (230) is circular, and the breaking elongation of the clamping wire (230) is greater than 10%; and / or the clamping wire (230) is made of polyetheretherketone material.

6. The skull plug for fixing a drainage tube according to claim 1, characterized in that: The clamping lines (230) are distributed equidistantly along the circumference of the upper plate (210); and / or, a plurality of protrusions are provided in the middle section of the clamping lines (230).

7. The skull plug for fixing a drainage tube according to claim 3, characterized in that: The first limiting portion (211) is a ratchet, and a recessed portion (140) adapted to the ratchet is provided in the first accommodating cavity (120).

8. The skull plug for fixing a drainage tube according to claim 7, characterized in that: The inner side surface of the recessed portion (140) comprises a limiting surface (141) for limiting the reverse rotation of the pawl and a meeting surface (142) for allowing the pawl to rotate in the forward direction, the angle between the limiting surface (141) and the inner contour surface of the first accommodating cavity (120) is 100°-120°, and the angle between the meeting surface (142) and the inner contour surface of the first accommodating cavity (120) is 140°-160°.

9. The skull plug for fixing a drainage tube according to claim 3, characterized in that: The upper plate (210) is provided with an abutment portion (212), and a supporting portion is provided in the first accommodating cavity (120), and the bottom surface of the abutment portion (212) is in contact with the top surface of the supporting portion.

10. The skull plug for fixing a drainage tube according to claim 1, characterized in that: A tool connection groove (213) for inserting a tool is provided on the top surface of the upper plate (210).

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