Depth-adjustable ventricular drainage device

Abstract

The invention discloses a depth-adjustable ventricular drainage device which comprises a sterile drainage bag and a drainage tube, one end of the drainage tube is provided with a plurality of drainage holes, the other end of the drainage tube is connected with the upper end of the sterile drainage bag, the drainage tube comprises a main tube and a telescopic tube, the telescopic tube is partially inserted into the main tube, the drainage holes are formed in the telescopic tube, and the drainage holes are communicated with the main tube. The main pipe is provided with an adjusting assembly used for driving the telescopic pipe to slide in the extending direction of the main pipe. The adjusting assembly comprises an adjusting nut, at least one outer magnet and inner magnets, an adjusting section is arranged at the end, away from the sterile drainage bag, of the main pipe, a threaded part is arranged on the adjusting section, the adjusting nut is in threaded connection with the periphery of the threaded part, the outer magnets are in linkage with the adjusting nut, and the inner magnets are equal to the outer magnets in number. The inner magnets are installed on the portions, located in the main pipe, of the telescopic pipes, and the inner magnets and the corresponding outer magnets are arranged in a mutual attraction mode. The depth of the drainage tube inserted into the cranium can be conveniently adjusted, and intracranial infection cannot occur in the adjusting process.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a ventricular drainage device with adjustable depth. Background Art

[0002] Ventricular drainage catheters, a vital neurosurgery device, are primarily used to treat neurological disorders such as hydrocephalus and intracranial hypertension. Made of biocompatible medical-grade silicone or polyurethane, these flexible catheters are precisely placed into the lateral or third ventricle to establish a channel for the drainage of cerebrospinal fluid (CSF), effectively regulating intracranial pressure and maintaining CSF homeostasis. In clinical practice, the catheter system typically remains in place for extended periods (from several days to several weeks) and requires dynamic adjustments during treatment in conjunction with an intracranial pressure monitoring system to ensure scientific control of CSF drainage volume and pressure parameters.

[0003] The current drainage systems in clinical use have significant operational difficulties: First, the lack of a precise positioning device during catheter insertion makes it difficult for the operator to control the depth of catheter insertion, which can easily lead to positional deviation (too deep, too shallow, or biased) and a high risk of secondary adjustment. Second, the extracorporeal segment of the catheter can be withdrawn after surgery, but cannot be aseptically advanced internally. Any secondary advancement of the extracorporeal segment of the catheter may cause retrograde infection by pathogens, significantly increasing the probability of intracranial infection. Based on this, the clinical practice urgently needs to innovate the design of a ventricular drainage system with an adjustable sealing structure. Through a built-in scale guide device and a closed internal advancement and withdrawal structure, full aseptic adjustment can be achieved while ensuring operational accuracy, thereby effectively improving surgical safety and infection prevention and control levels, and providing the possibility for flexible adjustment of the drainage tube after surgery. Summary of the Invention

[0004] In view of the above problems, the present application provides a ventricular drainage device with adjustable depth, which is used to solve the technical problems that the depth of the drainage tube inserted into the skull is difficult to control and prone to infection, so as to achieve flexible adjustment of the ventricular drainage tube during and after surgery.

[0005] To achieve the above objectives, the present application provides a depth-adjustable ventricular drainage device, comprising a drainage bag and a drainage tube, wherein one end of the drainage tube is provided with a drainage hole, and the other end of the drainage tube is connected to the drainage bag. The drainage tube comprises a main tube and a telescopic tube, wherein the distal end of the main tube is located within the skull and beneath the scalp, and the proximal end is located outside the scalp. The telescopic tube is partially inserted into the main tube, and the main tube is provided with an adjustment assembly for driving the telescopic tube to slide axially. The adjusting assembly includes an adjusting nut, an outer magnet, an inner magnet, a forward locking hook and a reverse locking hook, one end of the main pipe is provided with a threaded portion, the adjusting nut is threadedly connected to the outer periphery of the threaded portion, the number of the outer magnets is more than two and they are all linked with the adjusting nut, the inner magnet is installed in the telescopic tube and opposite to the corresponding outer magnet; the forward locking hook is arranged on the outer side of the inner magnet, and the reverse locking hook is arranged on the inner side of the other inner magnet, and the inner wall of the main pipe is provided with a first one-way limiting tooth cooperating with the forward locking hook, and a second one-way limiting tooth cooperating with the reverse locking hook, the first one-way limiting tooth engages with the forward locking hook to limit the telescopic tube from sliding outward, and the second one-way limiting tooth engages with the reverse locking hook to limit the telescopic tube from sliding inward; When the adjusting nut drives the outer magnet to move outward, the inner magnet is driven outward to abut against the positive locking hook, so that the positive locking hook is separated from the first one-way limiting tooth, and the telescopic tube slides outward along with the outer magnet; When the adjusting nut drives the outer magnet to move inward, the inner magnet is driven inward to counteract the reverse lock hook, so that the reverse lock hook is separated from the second one-way limiting tooth, and the telescopic tube slides inward along with the outer magnet.

[0006] Furthermore, the number of the outer magnets and the number of the inner magnets are both four, and the four outer magnets are distributed in a circular array on the outer periphery of the adjustment section, and the four inner magnets are distributed in a circular array on the telescopic tube; the forward locking hook and the reverse locking hook are arranged on the inner and outer sides of the two facing inner magnets.

[0007] Furthermore, the outer periphery of the adjusting nut is provided with a number of first magnet positioning grooves corresponding to the external magnets, and the external magnets are embedded in the corresponding first magnet positioning grooves; the outer periphery of the telescopic tube extending into the inner part of the main tube is provided with a number of second magnet positioning grooves corresponding to the internal magnets, and the internal magnets are embedded in the corresponding second magnet positioning grooves, and the inner magnets can be driven by the external magnet to move outward in the second magnet positioning groove to counteract the forward lock hook, or move inward to counteract the reverse lock hook.

[0008] Furthermore, an annular groove is provided on the outer periphery of the adjusting nut, the first magnet positioning groove is arranged in the annular groove, the annular groove is covered with an annular elastic band, and the inner side of the annular elastic band is provided with a positioning protrusion for pressing the external magnet tightly into the corresponding first magnet positioning groove.

[0009] Further, a locking rod is provided in the second magnet positioning groove. A barb locking portion is provided at the outer end of the locking rod. The barb locking portion is in a conical shape with a smaller outer diameter and a larger inner diameter. A positioning through hole is provided at the center of the inner magnet. The locking rod passes through the positioning through hole of the inner magnet. The diameter of the positioning through hole is larger than the outer diameter of the locking rod, so that the inner magnet can move outward or inward in the second magnet positioning groove.

[0010] Further, a locknut is also threadedly connected to the outer periphery of the threaded portion of the adjustment section. The locknut abuts tightly against the adjusting nut.

[0011] Further, the adjusting nut includes a nut body, a sliding ring, and a plurality of U-shaped linkage members for connecting the nut body and the sliding ring together. The nut body is threadedly connected to the threaded portion of the adjustment section. A plurality of guiding ridges are circumferentially provided on the inner side of the sliding ring. The guiding ridges extend axially along the sliding ring. A plurality of guiding chutes are provided on the threaded portion of the adjustment section and are matched with the guiding ridges. The outer magnet is provided on the sliding ring. A plurality of slots equivalent in number to the U-shaped linkage members are provided on the outer periphery of the sliding ring. An annular guiding groove is provided on the outer periphery of the adjusting nut. One end of the U-shaped linkage member is inserted into the corresponding slot on the outer periphery of the sliding ring, and the other end of the U-shaped linkage member extends into the annular guiding groove.

[0012] Further, the drainage tube is made of a transparent material, and a scale is axially provided on the adjustment section. A movable indicating line corresponding to the scale is provided on the telescopic tube.

[0013] Further, the drainage holes include a plurality of first guide holes and a plurality of second guide holes. The plurality of first guide holes are evenly distributed on the outer periphery of the telescopic tube, and a second guide hole is provided at the center position between every four adjacent first guide holes.

[0014] Further, an adjustable water stop clamp is also provided on the main pipe.

[0015] Different from the existing technology, the above technical solution sets the drainage tube as a telescopic structure. When in use, the telescopic tube is fully inserted into the skull, the distal end of the main tube is inside the skull and under the scalp, and the proximal end is outside the scalp. When the drainage tube is inserted too deep or too shallow, it is only necessary to rotate the adjusting nut, and the adjusting nut drives the outer magnet to slide axially along the adjusting section. Since the inner magnet and the outer magnet are attracted to each other, the movement of the outer magnet will drive the movement of the inner magnet, so that the inner magnet drives the telescopic tube to slide axially along the adjusting section, thereby achieving the deepening or withdrawal adjustment of the drainage tube. Moreover, since its displacement is achieved by the movement of the adjusting nut on the threaded part of the adjusting section, the adjusting nut moves spirally, and its adjustment accuracy is high, which can achieve slow movement of the telescopic tube. Moreover, in this technical solution, the distal end of the main tube is inside the skull and under the scalp, and the proximal end is outside the scalp. Therefore, after the telescopic tube and the connection between the telescopic tube and the main tube are fully extended into the skull, it will telescope in the skull and will not bring external bacteria into the skull to cause intracranial infection, which has the advantage of sterile operation. In the above technical solution, a forward locking hook and a corresponding first one-way limiting tooth, as well as a reverse locking hook and a corresponding second one-way limiting tooth are provided between the main pipe and the telescopic pipe. During non-adjustment operation, the forward locking hook and the reverse locking hook are locked to avoid relative displacement or falling off of the main pipe and the telescopic pipe due to accidental collision; and when the telescopic pipe is adjusted to slide by adjusting the nut, the forward locking hook and the reverse locking hook can automatically separate from the first one-way limiting tooth and the second one-way limiting tooth, so that the telescopic pipe can be freely adjusted.

[0016] The above-mentioned records related to the content of the invention are only an overview of the technical solution of this application. In order to enable ordinary technicians in this field to understand the technical solution of this application more clearly, and then implement it according to the text of the specification and the contents recorded in the drawings, and to make the above-mentioned purposes and other purposes, features and advantages of this application easier to understand, the following is an explanation in combination with the specific implementation methods and drawings of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, characteristics and effects of the specific embodiments of the present invention and other related contents, and are not to be considered as limiting the present application.

[0018] In the drawings of the specification: Figure 1 Schematic diagram of the overall structure of the depth-adjustable ventricular drainage device according to an embodiment; Figure 2 A partial cross-sectional view of the main pipe and the telescopic pipe in the embodiment; Figure 3 for Figure 2 A schematic diagram of the enlarged structure of the middle part A; Figure 4 Schematic diagram of the structure of the adjusting nut in Example 1; Figure 5 Schematic diagram of the structure of the telescopic tube in Example 1; Figure 6 is Figure 5 a schematic enlarged view of part B in Figure 7 is a schematic view of the structure of the adjusting nut cooperating with the main pipe in another embodiment; Figure 8 is Figure 2 the front elevation sectional view corresponding to part A in Figure 9 is Figure 8 a partial enlarged view of part C in Figure 10 is Figure 8 a partial enlarged view of part D in Figure 11 is a schematic view of the structure of the sliding ring in the embodiment; Figure 12 is the distribution diagram of the drainage holes in Embodiment 1. In the figure: 1. Sterile drainage bag; 2. Drainage tube; 3. Drainage hole; 4. Drainage pipe; 5. Drainage control valve; 6. Main pipe; 7. Telescopic pipe; 8. Adjusting component; 9. Adjusting nut; 10. Outer magnet; 11. Inner magnet; 12. Adjusting section; 13. Threaded part; 14. First magnet positioning groove; 15. Second magnet positioning groove; 16. Annular groove; 17. Annular elastic band; 18. Positioning protrusion; 19. Locking rod; 20. Barbed locking part; 21. Positioning through hole; 22. Locknut; 23. Nut body; 24. Sliding ring; 25. C-shaped linkage; 26. Guide rib; 27. Guide chute; 28. Slot; 29. Annular guide groove; 30. Scale; 31. Moving indicator line; 32. First guide hole; 33. Second guide hole; 34. Adjustable water stop clamp. 35. Forward locking hook; 36. First one-way limit tooth; 37. Reverse locking hook; 38. Second one-way limit tooth. 351. Hook body; 352. Hook handle; 353. Hinge shaft; Detailed Embodiments

[0019] To illustrate in detail the possible application scenarios, technical principles, specific implementable solutions, achievable purposes and effects of the present application, etc., the following is described in detail with reference to the specific embodiments listed and in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, so they are only examples and cannot be used to limit the protection scope of the present application.

[0020] References to "embodiments" herein mean that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the word "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the various technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution.

[0021] Unless otherwise defined, the technical terms used herein have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms herein is only for describing specific embodiments and is not intended to limit this application.

[0022] In the description of this application, the term "and / or" is used to describe a logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and both A and B exist. In addition, the character " / " in this document generally indicates that the objects before and after are in a logical "or" relationship.

[0023] In this application, terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, priority or sequence relationship between these entities or operations.

[0024] Without further limitations, in this application, the words "include", "comprise", "have" or other similar open-ended expressions used in sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product that includes the elements, so that the process, method or product that includes a series of elements may include not only those defined elements, but also other elements that are not explicitly listed, or also include elements inherent to such process, method or product.

[0025] Consistent with the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceed" are understood to exclude the number itself; expressions such as "above," "below," and "within" are understood to include the number itself. Furthermore, in the description of the embodiments of this application, "multiple" means two or more (including two), and similar expressions related to "multiple," such as "multiple groups" and "multiple times," are also understood in this manner, unless otherwise specifically defined.

[0026] In the description of the embodiments of the present application, the space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be understood as a limitation on the embodiments of the present application.

[0027] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms "installed", "connected", "connected", "fixed", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art of the present application, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0028] As attached Figures 1 to 12 The present invention shows a ventricular drainage device with adjustable depth. The ventricular drainage device with adjustable depth is used to treat neurological diseases such as hydrocephalus and intracranial hypertension.

[0029] like Figure 1 As shown, the depth-adjustable ventricular drainage device includes a sterile drainage bag 1 and a drainage tube 2, one end of the drainage tube 2 is provided with a plurality of drainage holes 3, the other end of the drainage tube 2 is connected to the upper end of the sterile drainage bag 1, and the lower end of the sterile drainage bag 1 is provided with a discharge pipe 4, and the discharge pipe 4 is provided with a discharge control valve 5, which is a three-way valve and also serves as a switch; the drainage tube 2 includes a main pipe 6 and a telescopic pipe 7, the telescopic pipe 7 is partially inserted into the main pipe 6, and the outer periphery of the position where the telescopic pipe 7 is inserted into the main pipe 6 is tightly fitted with the inner periphery of the main pipe 6, the drainage hole 3 is provided at the position where the telescopic pipe 7 is located outside the main pipe 6, and the main pipe 6 is provided with an adjustment component 8 for driving the telescopic pipe 7 to slide along the extension direction of the main pipe 6. In actual use, the distal end of the main tube 6 is inside the skull and under the scalp, and the proximal end is outside the scalp. The adjustment component 8 is also located outside the skin. Therefore, the telescopic tube 7 and the connection between the telescopic tube 7 and the main tube 6 are both located inside the skull, thereby preventing bacteria from entering the tube through the connection between the telescopic tube 7 and the main tube 6.

[0030] like Figure 2 and Figure 3As shown, the adjustment assembly 8 includes an adjustment nut 9, an external magnet 10 and an internal magnet 11. The end of the main pipe 6 away from the sterile drainage bag 1 is provided with an adjustment section 12. The outer diameter of the adjustment section 12 is larger than the outer diameter of the non-adjustment section 12 on the main pipe 6. The adjustment section 12 is provided with a threaded portion 13 (external thread). The adjustment nut 9 is threadedly connected to the outer periphery of the threaded portion 13 of the adjustment section 12, that is, the inner periphery of the adjustment nut 9 has an internal thread that matches the external thread on the threaded portion 13. The number of the external magnet 10 is at least one, and the external magnet 10 and the adjustment nut are connected. The nut 9 is linked to the main tube 6, and the number of the inner magnets 11 is equivalent to that of the outer magnets 10. The inner magnets 11 are installed at the position of the telescopic tube 7 located inside the main tube 6. The inner magnets 11 and the corresponding outer magnets 10 are arranged to attract each other, that is, the end of the inner magnet 11 facing the outer magnet 10 is the N pole (S pole), and the end of the outer magnet facing the inner magnet 11 is the S pole (N pole). When the adjusting nut 9 rotates on the threaded portion 13 of the adjusting section 12, the outer magnet 10 slides axially along the adjusting section 12. At the same time, the inner magnet 11 drives the telescopic tube 7 to slide axially along the adjusting section 12 along with the outer magnet 10. The drainage tube 2 is set to a telescopic structure. When in use, the telescopic tube 7 is fully inserted into the skull. When the drainage tube 2 is inserted too deeply or too shallowly, only the adjusting nut 9 needs to be rotated. The adjusting nut 9 drives the outer magnet 10 to slide axially along the adjusting section 12. Since the inner magnet 11 and the outer magnet 10 are attracted to each other, the movement of the outer magnet 10 will drive the movement of the inner magnet 11, so that the inner magnet 11 drives the telescopic tube 7 to slide axially along the adjusting section 12, thereby achieving the deepening or withdrawal adjustment of the drainage tube 2. Moreover, since its displacement is achieved by the movement of the adjusting nut 9 on the threaded portion 13 of the adjusting section 12, the adjusting nut 9 moves spirally, and its adjustment accuracy is high, which can realize the slow movement of the telescopic tube 7. Moreover, after the telescopic tube 7 is fully extended into the skull, it telescopes in the skull and will not bring external bacteria into the skull to cause intracranial infection, which has the advantage of aseptic operation.

[0031] like Figure 3 、 Figure 8 and Figure 9 As shown, considering that the extension length between the main tube 6 and the telescopic tube 7 is adjusted by magnetic force, there is a certain possibility that the telescopic tube 7 may be misaligned or fall off due to accidental contact. Therefore, to avoid this problem, in this embodiment, the adjustment assembly further includes a forward locking hook 35, a reverse locking hook 37, a first one-way limiting tooth 36, and a second one-way limiting tooth 38. The forward locking hook 35 is arranged on the outside of the inner magnet, and the reverse locking hook 37 is arranged on the inside of the other inner magnet. The inner wall of the main tube is provided with a first one-way limiting tooth 36 that cooperates with the forward locking hook 35, and a second one-way limiting tooth 38 that cooperates with the reverse locking hook 37. The first one-way limiting tooth 36 engages with the forward locking hook 35 to limit the telescopic tube from sliding outward, and the second one-way limiting tooth 38 engages with the reverse locking hook 37 to limit the telescopic tube from sliding inward.

[0032] The forward locking hook 35 cooperates with the first one-way limiting tooth 36 to limit the telescopic tube from moving outward under the action of external force (i.e., abnormal operation and force); the reverse locking hook 37 cooperates with the second one-way limiting tooth 38 to limit the telescopic tube from moving inward under the action of external force (i.e., abnormal operation and force). The outward refers to the direction in which the telescopic tube moves away from the main tube, i.e. Figure 8 、 Figure 9 and Figure 10 In the direction indicated by the arrow X, the inner side refers to the direction in which the telescopic tube moves closer to the main tube.

[0033] like Figure 9 and Figure 10 As shown, one end of the forward lock hook 35 and the reverse lock hook 37 is provided with a hook body 351, and the other end is a hook handle 352 that abuts against the internal magnet. A hinge shaft 353 is provided in the middle area of the hook body 351 and the hook handle 352 (i.e., the middle section of the forward lock hook 35 and the middle section of the reverse lock hook 37). The hinge shaft 353 is hinged to the telescopic tube, and a spring is sleeved on the hinge shaft 353. The spring makes the hook body 351 of the forward lock hook 35 engage with the first one-way limiting tooth 36 when the forward lock hook 35 is not in contact with the internal magnet. When the internal magnet presses the hook handle 352 outward, the forward lock hook 35 rotates around the hinge shaft 353, thereby separating the hook body 351 from the first one-way limiting tooth 36, so that the telescopic tube can slide outward. A plurality of first one-way limiting teeth 36 are arranged at equal intervals along the axial direction of the main tube, and the tooth tip of each first one-way limiting tooth 36 is inclined inward, so that Figure 9 As shown, the positive locking hook 35 and the first one-way limiting tooth 36 only restrict the telescopic tube from sliding outward, but do not restrict the telescopic tube from sliding inward.

[0034] like Figure 10 As shown, the structure of the reverse lock hook 37 and its cooperation with the inner magnet are similar to those of the positive and negative lock hooks, except that they are in a mirror-symmetrical relationship. When the inner magnet presses the hook handle of the reverse lock hook 37 inward, the reverse lock hook 37 rotates around the hinge axis, thereby separating the hook body from the second one-way limiting tooth 38, so that the telescopic tube can slide outward. Figure 10 As shown, a plurality of second one-way limiting teeth 38 are arranged at equal intervals in the axial direction of the main tube, and the tooth tip of each second one-way limiting tooth 38 is inclined outward. The reverse locking hook 37 and the second one-way limiting teeth 38 only limit the telescopic tube from sliding inward, but do not limit the telescopic tube from sliding outward.

[0035] Therefore, the forward locking hook 35 , the reverse locking hook 37 , the first one-way limiting tooth 36 and the second one-way limiting tooth 38 can simultaneously limit the telescopic tube from sliding inwardly and outwardly.

[0036] When the adjusting nut drives the outer magnet outward, the inner magnet is also driven outward to abut against the forward locking hook 35, causing the forward locking hook 35 to separate from the first one-way limiting tooth 36, and the telescopic tube slides outward along with the outer magnet. When the adjusting nut drives the outer magnet inward, the inner magnet is also driven inward to abut against the reverse locking hook 37, causing the reverse locking hook 37 to separate from the second one-way limiting tooth 38, and the telescopic tube slides inward along with the outer magnet. When the adjusting nut is used to adjust the telescopic tube to slide outward, the forward locking hook 35 and the first one-way limiting tooth 36 are automatically separated, while when the adjusting nut is used to adjust the telescopic tube to slide inward, the reverse locking hook and the second one-way limiting tooth 38 are automatically separated.

[0037] The forward locking hook 35 and the corresponding first one-way limiting tooth 36, as well as the reverse locking hook and the corresponding second one-way limiting tooth 38, are locked during non-adjustment operation to prevent relative displacement or falling off of the main tube and the telescopic tube caused by accidental collision; and when the telescopic tube is adjusted to slide by the adjusting nut, the forward locking hook 35 and the reverse locking hook can automatically separate from the first one-way limiting tooth 36 and the second one-way limiting tooth 38, so that the telescopic tube can be freely adjusted.

[0038] As attached Figures 3 to 6 As shown, there are four outer magnets 10 and four inner magnets 11, each of which is arranged in a circular array around the outer periphery of the adjustment section 12. The four inner magnets 11 are also arranged in a circular array around the telescopic tube 7. The four inner magnets 11 and the four outer magnets 10 attract and cooperate with each other at four circumferential positions, evenly applying force to the telescopic tube 7. This allows the adjusting nut 9 to stably drive the telescopic tube 7 when it is rotated.

[0039] like Figure 8 As shown, the forward locking hook 35 and the reverse locking hook are arranged on the inner and outer sides of the two inner magnets facing each other, that is, the forward locking hook 35 and the reverse locking hook form a 180-degree angle in the circumferential direction of the telescopic tube.

[0040] As attached Figures 3 to 6 As shown, the outer circumference of the adjusting nut 9 is provided with a number of first magnet positioning grooves 14 corresponding to the number of external magnets 10. The outer circumference of the telescopic tube 7 extending into the interior of the main tube 6 is provided with a number of second magnet positioning grooves 15 corresponding to the number of internal magnets 11. The external magnets 10 are embedded in the corresponding first magnet positioning grooves 14, and the internal magnets 11 are embedded in the corresponding second magnet positioning grooves 15. The mounting structure of the external magnets 10 and the internal magnets 11 is simple and reliable, facilitating assembly and production.

[0041] As attached Figures 3 to 6As shown, the outer circumference of the adjusting nut 9 is provided with an annular groove 16, and the first magnet positioning groove 14 is disposed within the annular groove 16, that is, the first magnet positioning groove 14 is located within the range covered by the annular groove 16. The annular groove 16 is covered with an annular elastic band 17, and the inner side of the annular elastic band 17 is provided with a positioning protrusion 18 for pressing the outer magnet 10 against the corresponding first magnet positioning groove 14. The positioning protrusion 18 and the annular elastic band 17 are an integral structure and can be made of rubber or silicone. This design can stably confine the outer magnet 10 within the first magnet positioning groove 14, improving the reliability of the structure.

[0042] As attached Figures 3 to 6 As shown, a locking rod 19 is provided in the second magnet positioning groove 15, and a barb locking portion 20 is integrally provided at the outer end of the locking rod 19. The barb locking portion 20 is in a conical shape with a small outside and a large inside. A positioning through hole 21 is provided at the center of the inner magnet 11. The locking rod 19 passes through the positioning through hole 21 of the inner magnet 11, and the barb locking portion 20 at the outer end of the locking rod 19 abuts against the surface of the inner magnet 11 to prevent the inner magnet from falling off the locking rod.

[0043] like Figure 9 and Figure 10 As shown, the inner magnet is embedded in the corresponding second magnet positioning groove, and the inner magnet can be driven by the outer magnet to move outward in the second magnet positioning groove to abut against the forward lock hook 35, or move inward to abut against the reverse lock hook.

[0044] The diameter of the positioning through-hole is larger than the outer diameter of the locking rod, allowing the inner magnet to move outward or inward within the second magnet positioning slot. This design stably confines the inner magnet 11 within the second magnet positioning slot 15, improving structural reliability. It also allows the inner magnet to move relative to the locking rod 19, allowing it to abut against either the forward locking hook 35 or the reverse locking hook. That is, at any given moment, the inner magnet may abut only against the forward locking hook 35, only against the reverse locking hook, or neither.

[0045] As attached Figure 3 As shown, a locking nut 22 is threadedly connected to the outer periphery of the threaded portion 13 of the adjusting section 12, and the locking nut 22 is tightly abutted against the adjusting nut 9. When the locking nut 22 is pressed against the adjusting nut 9, the thread friction between the adjusting nut 9 and the threaded portion 13 is increased, thereby preventing the adjusting nut 9 from loosening when the adjusting nut 9 reaches a specific position.

[0046] As attached Figure 2 and attached Figure 5As shown, the drainage tube 2 is made of a transparent material, and a scale 30 is provided axially on the adjustment section 12. The telescopic tube 7 is provided with a movable indicator line 31 corresponding to the scale 30. This design provides a reference for medical personnel when operating the drainage tube 2 to extend or retract. Based on the relative displacement of the movable indicator line 31 on the telescopic tube 7 relative to the scale 30 on the adjustment section 12 of the main tube 6, the depth of the telescopic tube 7 in or out of the skull can be determined, greatly facilitating drainage operations.

[0047] As attached Figure 12 As shown, the drainage holes 3 include multiple first guide holes 32 and multiple second guide holes 33. The multiple first guide holes 32 are evenly distributed around the outer circumference of the telescopic tube 7, and a second guide hole 33 is provided at the center of every four adjacent first guide holes 32. The clever arrangement of the drainage holes 3 and the rational use of space allow for the provision of more drainage holes 3, thereby making it easier for intracranial fluid to be discharged through the drainage tube 2.

[0048] As attached Figure 1 As shown, the main pipe 6 is further provided with an adjustable water-stop clamp 34. The main pipe 6 is provided with an adjustable water-stop clamp 34 to facilitate control of the flow rate and on-off of the liquid in the main pipe 6.

[0049] like Figure 7 、 Figure 8 and Figure 11As shown, in one embodiment, the adjusting nut 9 can be of a split structure. Among them, the adjusting nut 9 includes a nut body 23, a sliding ring 24, and a plurality of U-shaped linkage members 25 for connecting the nut body 23 and the sliding ring 24 together. The nut body 23 is threadedly connected to the threaded portion 13 of the adjusting section 12. A plurality of guiding ridges 26 are circumferentially provided on the inner side of the sliding ring 24, and the guiding ridges 26 extend along the axial direction of the sliding ring 24. A plurality of guiding chutes 27 that cooperate with the guiding ridges 26 are provided on the threaded portion 13 of the adjusting section 12. The outer magnet 10 is arranged on the sliding ring 24, and its installation method is the same as that of the outer magnet 10 in Embodiment 1. A plurality of slots 28 equivalent in number to the U-shaped linkage members 25 are provided on the outer circumference of the sliding ring 24. An annular guiding groove 29 is provided on the outer circumference of the adjusting nut 9. One end of the U-shaped linkage member 25 is inserted into the corresponding slot 28 on the outer circumference of the sliding ring 24, and the other end of the U-shaped linkage member 25 extends into the annular guiding groove 29. It should be noted that the U-shaped linkage member 25 and the annular guiding groove 29 can slide relative to each other, and there is a gap between the other end of the U-shaped linkage member 25 and the groove wall of the annular guiding groove 29, so that the two can slide relative to each other. When the nut body 23 rotates circumferentially, the annular guiding groove 29 on the nut body 23 rotates synchronously with the nut body 23, and the other end of the U-shaped linkage member 25 and the annular guiding groove 29 slide relative to each other circumferentially; when the nut body 23 rotates, it will move axially. Therefore, the sliding ring 24 can be driven to move axially through the U-shaped linkage member 25. That is, the nut body 23 and the sliding ring 24 rotate relative to each other circumferentially, and move synchronously axially. When the nut body 23 rotates, the sliding ring 24 does not rotate, but the sliding ring 24 will move axially synchronously with the nut body 23.

[0050] Compared with the situation in Embodiment 1 where the rotation of the adjusting nut 9 drives the telescopic tube 7 to rotate and move axially, in this embodiment, the outer magnet 10 is arranged on the non-rotating sliding ring 24. When the nut body 23 is rotated to cause the nut body 23 to have an axial displacement, due to the axial guiding structure of the sliding ring 24, the nut body 23 drives the sliding ring 24 to move axially through the U-shaped linkage member 25, and the sliding ring 24 drives the telescopic rod to move axially through the magnetic attraction of the magnet. Moreover, the telescopic rod will not rotate during the axial movement process, which can better protect the intracranial tissue.

[0051] Finally, it should be noted that although the above embodiments have been described in the text of the specification and the drawings of the present application, the patent protection scope of the present application cannot be limited thereby. Any technical solution obtained by equivalent structure or equivalent process substitution or modification based on the essential concept of the present application, using the content recorded in the text of the specification and the drawings of the present application, as well as any technical solution directly or indirectly implementing the above embodiments in other related technical fields, etc., are all included in the patent protection scope of the present application.

Claims

1. A ventricular drainage device with adjustable depth, comprising a drainage bag and a drainage tube, wherein one end of the drainage tube is provided with a drainage hole, and the other end of the drainage tube is connected to the drainage bag, characterized in that: The drainage tube includes a main tube and a telescopic tube. The distal end of the main tube is inside the skull and under the scalp, and the proximal end is outside the scalp. The telescopic tube is partially inserted into the main tube. The main tube is provided with an adjustment component for driving the telescopic tube to slide along the axial direction. The adjusting assembly includes an adjusting nut, an outer magnet, an inner magnet, a forward locking hook and a reverse locking hook, one end of the main pipe is provided with a threaded portion, the adjusting nut is threadedly connected to the outer periphery of the threaded portion, the number of the outer magnets is more than two and they are all linked with the adjusting nut, the inner magnet is installed in the telescopic tube and opposite to the corresponding outer magnet; the forward locking hook is arranged on the outer side of the inner magnet, and the reverse locking hook is arranged on the inner side of the other inner magnet, and the inner wall of the main pipe is provided with a first one-way limiting tooth cooperating with the forward locking hook, and a second one-way limiting tooth cooperating with the reverse locking hook, the first one-way limiting tooth engages with the forward locking hook to limit the telescopic tube from sliding outward, and the second one-way limiting tooth engages with the reverse locking hook to limit the telescopic tube from sliding inward; When the adjusting nut drives the outer magnet to move outward, the inner magnet is driven outward to abut against the positive locking hook, so that the positive locking hook is separated from the first one-way limiting tooth, and the telescopic tube slides outward along with the outer magnet; When the adjusting nut drives the outer magnet to move inward, the inner magnet is driven inward to counteract the reverse lock hook, so that the reverse lock hook is separated from the second one-way limiting tooth, and the telescopic tube slides inward along with the outer magnet.

2. The depth-adjustable ventricular drainage device according to claim 1, characterized in that: The number of the outer magnets and the number of the inner magnets are both four, and the four outer magnets are distributed in a circular array on the outer periphery of the adjustment section of the main tube, and the four inner magnets are distributed in a circular array on the telescopic tube; the forward locking hook and the reverse locking hook are arranged on the inner and outer sides of the two facing inner magnets.

3. The depth-adjustable ventricular drainage device according to claim 1 or 2, characterized in that: The outer periphery of the adjusting nut is provided with a number of first magnet positioning grooves corresponding to the number of the external magnets, and the external magnets are embedded in the corresponding first magnet positioning grooves; the outer periphery of the telescopic tube extending into the inner part of the main tube is provided with a number of second magnet positioning grooves corresponding to the number of the internal magnets, and the internal magnets are embedded in the corresponding second magnet positioning grooves, and the inner magnets can be driven by the external magnet to move outward in the second magnet positioning groove to counteract the forward lock hook, or move inward to counteract the reverse lock hook.

4. The depth-adjustable ventricular drainage device according to claim 3, characterized in that: An annular groove is provided on the outer periphery of the adjusting nut, the first magnet positioning groove is arranged in the annular groove, the annular groove is covered with an annular elastic band, and a positioning protrusion is provided on the inner side of the annular elastic band for pressing the outer magnet tightly into the corresponding first magnet positioning groove.

5. The depth-adjustable ventricular drainage device according to claim 3, characterized in that: A locking rod is provided in the second magnet positioning groove, and a barb locking portion is provided at the outer end of the locking rod. The barb locking portion is in a conical shape with a small outside and a large inside. A positioning through hole is provided at the center of the inner magnet, and the locking rod passes through the positioning through hole of the inner magnet. The aperture of the positioning through hole is larger than the outer diameter of the locking rod, so that the inner magnet can move outward or inward in the second magnet positioning groove.

6. The depth-adjustable ventricular drainage device according to claim 5, characterized in that: The outer periphery of the threaded portion of the adjusting section is also threadedly connected with a locking nut, and the locking nut is tightly pressed against the adjusting nut.

7. The depth-adjustable ventricular drainage device according to claim 1 or 2, characterized in that: The adjusting nut includes a nut body, a sliding ring, and a plurality of U-shaped linkage members for connecting the nut body and the sliding ring together. The nut body is threadedly connected to the threaded portion. A plurality of guiding ridges are circumferentially provided on the inner side of the sliding ring, and the guiding ridges extend axially along the sliding ring. A plurality of guiding chutes matching the guiding ridges are provided on the threaded portion. The outer magnet is arranged on the sliding ring. A plurality of slots equal in number to the U-shaped linkage members are provided on the outer circumference of the sliding ring. An annular guiding groove is provided on the outer circumference of the adjusting nut. One end of the U-shaped linkage member is inserted into the corresponding slot on the outer circumference of the sliding ring, and the other end of the U-shaped linkage member extends into the annular guiding groove.

8. The depth-adjustable ventricular drainage device according to claim 1, characterized in that: The drainage tube is made of a transparent material, and scales are axially provided on the adjusting section of the main tube. A movable indicating line corresponding to the scales is provided on the telescopic tube.

9. The depth-adjustable ventricular drainage device according to claim 1, characterized in that: The drainage holes include a plurality of first guiding holes and a plurality of second guiding holes. The plurality of first guiding holes are evenly distributed on the outer circumference of the telescopic tube, and a second guiding hole is arranged at the central position of every adjacent four first guiding holes.

10. The depth-adjustable ventricular drainage device according to claim 1, characterized in that: An adjustable water stop clamp is further arranged on the main tube.

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