A hydrocephalus shunt valve and positioning tool

Abstract

A hydrocephalus shunt valve and positioning tool. Relating to the field of medical devices. Reliably achieving engagement, locking, or unlocking of the operating components during adjustment, preventing malfunction. The present invention comprises a valve body and a valve cover, with an inlet and an outlet respectively provided at both ends of the valve body, and a valve ball provided in the inlet; a pressure regulating device provided within the valve body; the pressure regulating device comprising: a rotor and a bow spring assembly; the rotor being movably pivoted to the center pivot pin, retaining the freedom of rotation around the center pivot pin and the freedom of axial movement; a cam platform provided on the top surface of the rotor, a pair of fan-shaped bosses provided on the bottom surface of the rotor, hemispherical spherical protrusions provided on the bottom surface of the fan-shaped bosses, the hemispherical spherical protrusions being adapted to a circle of graduated positioning grooves; and a compression spring provided on the top surface of the rotor. The present invention innovatively provides a graduated engagement and locking measure within the valve body. During normal use, the valve body can reliably maintain its adjusted state, preventing and eliminating malfunctions. Reliably achieving unlocking of the operating components during adjustment.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a hydrocephalus shunt valve, a pressure reading tool for reading the working pressure of the hydrocephalus shunt valve, and a tool for adjusting the pressure of the hydrocephalus shunt valve. Background Art

[0002] Hydrocephalus is characterized by excessive secretion of cerebrospinal fluid (CSF), insufficient reabsorption, or mechanical obstruction of the pathway. Most of the time, hydrocephalus is caused by obstruction of the CSF absorption site, resulting in excessive accumulation in the ventricular system, leading to neurological or movement disorders in patients. If left untreated, this obstruction can lead to an enlarged head in infants whose skull sutures have not yet fused, followed by brain damage. In adults, due to the rigidity of the skull, the pressure on the brain due to the pressure of the cerebrospinal fluid increases, and symptoms such as headaches, gait disorders, and dementia have been reported. This obstructed circulation is usually treated with ventriculoperitoneal shunt surgery, which requires the use of a hydrocephalus shunt valve.

[0003] Ventriculoperitoneal shunt surgery typically involves inserting a catheter into the ventricles through a hole in the skull. This catheter is connected to a hydrocephalus shunt valve inserted under the scalp. The hydrocephalus shunt valve is connected to another catheter under the skin that leads to the peritoneum. Once implanted, the hydrocephalus shunt valve regulates intraventricular pressure. The valve's opening pressure can be adjusted noninvasively after surgery to accommodate normal intraventricular pressure fluctuations.

[0004] Existing hydrocephalus shunt valves primarily utilize a rotor with a magnetic element within the valve, which is rotated to adjust valve pressure. Using an adjustment device equipped with a magnetic element, the magnetic coupling between the rotor and the device allows for non-invasive adjustment of the shunt valve opening pressure through the patient's skin. However, potential malfunctions during the non-adjustment phase pose a significant safety hazard.

[0005] Therefore, how to improve the hydrocephalus shunt valve in the prior art so that it can reliably maintain the adjusted state during the non-adjustment stage and avoid or eliminate the occurrence of malfunction has become a technical problem that needs to be solved urgently in this field. Summary of the Invention

[0006] In response to the above technical problems, the present invention proposes a hydrocephalus shunt valve and a pressure tool that can reliably achieve engagement, locking or unlocking of the action parts during the adjustment process, thereby avoiding malfunction.

[0007] A hydrocephalus shunt valve according to the present invention comprises a valve body and a valve cover. An inlet and an outlet are respectively provided at both ends of the valve body, and a valve port ball is provided in the inlet. A central pivot pin is provided at the center of the bottom surface of the valve body, and a circle of graduated positioning grooves is provided around the central pivot pin. A bow-shaped spring assembly pivot pin is also provided at the edge of the bottom surface of the valve body.

[0008] A pressure regulating device is also provided in the valve body; the pressure regulating device comprises: a rotor and a bow spring assembly;

[0009] The rotor is movably pivoted on the central rotating pin, retaining the freedom of rotation around the central rotating pin and the freedom of axial movement;

[0010] The top surface of the rotor is provided with a cam platform, the bottom surface of the rotor is provided with a pair of fan-shaped bosses, and the bottom surface of the fan-shaped bosses is provided with a hemispherical convexity, and the hemispherical convexity is adapted to a circle of the indexing positioning groove group;

[0011] The bow spring assembly includes: a rotating sleeve, a bow spring leaf and a rigid rod, wherein the bow spring leaf and the rigid rod are fixedly connected to the sleeve body of the rotating sleeve, the distal end of the rigid rod abuts against the cam surface of the cam platform, and the distal end of the bow spring leaf abuts against the valve port ball;

[0012] A spring is provided on the top surface of the rotor.

[0013] Furthermore, a rotor bottom cavity is provided on the bottom surface of the rotor.

[0014] Furthermore, a positioning column is provided in the cavity at the bottom of the rotor and on the inner side of the fan-shaped boss.

[0015] Furthermore, a pair of limiting posts for limiting the rotation range of the rotor with the positioning posts to 0-270° are provided on the bottom surface of the valve body.

[0016] Furthermore, a magnet receiving groove is provided on the upper surface of the rotor, and a permanent magnet 1 is provided in the magnet receiving groove.

[0017] Furthermore, a circle of developing material accommodating grooves is provided on the periphery of the graduation positioning groove group.

[0018] Furthermore, the indexing positioning groove group has an annular wave surface, and a ball socket adapted to the hemispherical convex is provided at the center of the wave trough.

[0019] A positioning tool for a hydrocephalus shunt valve according to the present invention comprises a cylinder, a box, a magnetic needle, a main shaft, and a transparent cover. The box is offset outside the cylinder, the main shaft is provided on the bottom surface of the box, the magnetic needle is movably connected to the main shaft, and the transparent cover covers the box. An indicator mark is provided on the edge of the top surface of the cylinder.

[0020] Furthermore, it also includes a pressure reading tool, which includes a round box, a rotating pin, two magnetic needles and two transparent covers; a rotating pin is fixedly provided in the round box, the two magnetic needles are movably connected to the rotating pin, and the two transparent covers are arranged at the top of the round box; the round box has a lower step circle, and the lower step circle is adapted to the inner cylinder opening of the cylinder.

[0021] Furthermore, it also includes a pressure regulating tool, which includes: an regulating tool housing, an electromagnet bracket, an regulating tool electromagnet, an regulating tool end cover and an regulating tool pointer. The electromagnet bracket is fixedly provided in the inner cavity of the regulating tool housing, the electromagnet is fixedly provided on the electromagnet bracket, the regulating tool end cover is provided on the regulating tool housing, and the regulating tool pointer is provided on the upper surface of the regulating tool end cover.

[0022] The present invention innovatively incorporates a graduated meshing locking mechanism within the valve body. This mechanism relies on the meshing and dismeshing of hemispherical recesses and protrusions on the valve body and rotor, respectively, to lock and unlock the valve. This prevents the rotor from malfunctioning during the non-adjustment phase. Furthermore, the hemispherical recesses on the valve body are positioned within wave-shaped grooves. During the adjustment phase, even if the rotor is not precisely rotated to the trough, it can slide to the trough position and engage the valve body under its own gravity and spring pressure. Furthermore, to facilitate the use of the diverter valve of the present invention, specialized tools for positioning, reading, and pressure adjustment are also adaptively proposed.

[0023] The present invention can reliably maintain the adjusted state during normal use, avoiding and eliminating the occurrence of malfunctions. During adjustment, the action components can be reliably unlocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a three-dimensional exploded view of the hydrocephalus shunt valve of the present invention.

[0026] Figure 2This is a schematic structural diagram of the hydrocephalus shunt valve of the present invention.

[0027] Figure 3 yes Figure 2 A top view of

[0028] Figure 4 This is a three-dimensional diagram of the rotor in the present invention. Figure 1 ,

[0029] Figure 5 This is a three-dimensional diagram of the rotor in the present invention. Figure 2 ,

[0030] Figure 6 This is a three-dimensional diagram of the valve body in the present invention Figure 1 ,

[0031] Figure 7 This is a schematic diagram of the structure of the valve body in the present invention Figure 2 ,

[0032] Figure 8 yes Figure 7 Middle AA section view,

[0033] Figure 9 is a schematic diagram of the meshing state between the rotor and the valve body in the present invention,

[0034] Figure 10 Schematic diagram of the disengagement state between the rotor and the valve body in the present invention,

[0035] Figure 11 It is a structural diagram of the positioning tool in the present invention,

[0036] Figure 12 yes Figure 11 A top view of

[0037] Figure 13 is a three-dimensional exploded view of the reading tool of the present invention,

[0038] Figure 14 is a schematic structural diagram of the reading tool in the present invention,

[0039] Figure 15 This is a schematic diagram of the combination of the reading tool and the positioning tool in the present invention.

[0040] Figure 16 is a schematic structural diagram of the pressure regulating tool in the present invention,

[0041] Figure 17 yes Figure 16 A top view of

[0042] In the figure: 1-inlet, 2-valve port ball, 3-bow spring assembly, 31-rotor sleeve, 32-bow reed, 33-rigid rod, 4-rotor, 41-cam platform, 42-magnet accommodating groove, 43-side groove, 44-sector boss, 441-hemispherical ball convex, 45-rotor bottom cavity, 46-positioning column, 5-spring, 6-valve cover, 7-outlet, 8-valve body, 81-indexing positioning groove group, 82-bow spring assembly rotation pin, 83-center rotation pin, 84-limiting column, 85-developing material accommodating groove, 9-permanent magnet 1, 10-permanent magnet 2,

[0043] 11 is a positioning tool, 1101 is a cylinder, 1102 is a box body, 1103 is a magnetic needle 1, 1104 is a main shaft, 1105 is a transparent cover 1,

[0044] 12 is a pressure regulating tool, 1201 is a regulating tool housing, 1202 is an electromagnet bracket, 1203 is an electromagnet, 1204 is an regulating tool end cover, 12041 is an regulating tool indicator mark,

[0045] 13 is a pressure reading tool, 1301 is a round box, 1302 is a rotating pin, 1303 is a second magnetic needle, and 1304 is a second transparent cover. DETAILED DESCRIPTION

[0046] The following is combined with Figure 1-17 The technical solution of the present invention is further illustrated through specific implementation methods.

[0047] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting this patent; in order to better illustrate the embodiments of the present invention, 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 in the drawings may be omitted.

[0048] 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", "inside", "outside" and the like indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0049] In the description of the present invention, unless otherwise expressly specified or limited, when the term "connection" or the like appears to indicate a connection relationship between components, such term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be internal communication between two components or an interaction between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood in specific circumstances.

[0050] like Figure 1-8 As shown, the present invention includes a valve body 8 and a valve cover 6. The valve body 8 is provided with an inlet 1 and an outlet 7 at both ends, and a valve ball 2 is provided in the inlet 1. A center rotation pin 83 is provided at the center position of the bottom surface of the valve body 8, and a circle of indexing positioning groove group 81 is provided on the periphery of the center rotation pin 83. A bow spring assembly rotation pin 82 is also provided on the edge of the bottom surface of the valve body 8.

[0051] A pressure regulating device is also provided in the valve body 8 ; the pressure regulating device comprises a rotor 4 and a bow spring assembly 3 .

[0052] The rotor 4 is movably pivoted on the central rotating pin 83 , retaining the freedom of rotation around the central rotating pin 83 and the freedom of axial movement.

[0053] The top surface of the rotor 4 is provided with a cam platform 41 , the bottom surface of the rotor 4 is provided with a pair of fan-shaped bosses 44 , and the bottom surface of the fan-shaped bosses 44 is provided with a hemispherical ball protrusion 441 , which is adapted to a circle of indexing positioning groove group 81 .

[0054] The bow spring assembly 3 includes: a rotating sleeve 31, a bow spring leaf 32 and a rigid rod 33. The bow spring leaf 32 and the rigid rod 33 are fixedly connected to the sleeve body of the rotating sleeve 31. The distal end of the rigid rod 33 abuts against the cam surface of the cam platform 41, and the distal end of the bow spring leaf 32 abuts against the valve port ball 2.

[0055] A spring 5 is provided on the top surface of rotor 4, applying downward pressure to ensure that hemispherical protrusion 441 engages within indexing groove set 81. The bow spring assembly 3 and rotor 4 are configured to allow the opening pressure of the hydrocephalus shunt valve to be adjusted in steps within a range of 20 to 220 mmH2O.

[0056] Furthermore, the bottom surface of the rotor 4 has a rotor bottom cavity 45. This cavity is formed by a pair of sector-shaped bosses 44 abutting the bottom surface of the valve body 8. Its function is to retain the flow of the liquid medium. Side grooves 43 are formed on the outer sides of the sector-shaped bosses 44 to confirm the rotor position during magnetic imaging.

[0057] Furthermore, a positioning post 46 is provided in the cavity 45 at the bottom of the rotor and inside the sector boss 44. A pair of limiting posts 84 are provided on the bottom surface of the valve body 8 for limiting the rotation range of the rotor 4 with the positioning post 46 to 0-280 degrees.

[0058] Furthermore, a magnet receiving groove 42 is provided on the upper surface of the rotor 4, and a permanent magnet 9 is provided in the magnet receiving groove 42. The magnet receiving groove 42 corresponds to the position of the hemispherical ball protrusion 441, which is more convenient for adjustment and identification and fully utilizes the thickness of the fan-shaped boss.

[0059] Furthermore, a circle of developing material receiving grooves 85 is provided around the periphery of the indexing positioning groove group 81. The developing material is placed therein so as to clearly show the position of the shunt valve during inspection after placement into the skull.

[0060] Furthermore, the indexing and positioning groove set 81 has an annular wavy surface, with a socket at the center of the trough that fits the hemispherical protrusion 441. The height difference between the crest and trough of the wavy groove does not exceed half the depth of the hemispherical recess, and the transitions between the various cross-sections of the wavy groove are smooth, facilitating the movement and positioning of the hemispherical protrusion as the rotor rotates.

[0061] like Figure 9 As shown, under the pressure of spring 5, rotor 4's hemispherical projections 441 engage with the graduated positioning grooves 81 on valve body 8, limiting its rotation. The hemispherical projections on the rotor engage with the hemispherical recesses on the valve body, locking the rotor and preventing malfunction during non-adjustment phases. Furthermore, the graduated positioning grooves (i.e., when the projections are positioned at different angles within the positioning grooves) enable adjustment at varying pressures.

[0062] like Figure 10 As shown, when the opening pressure of the hydrocephalus shunt valve needs to be adjusted, the rotor 4 is driven to rotate by magnetic force under the coupling effect of the permanent magnet 9 and the external magnetic pole, and the hemispherical ball protrusion 441 on the rotor 4 moves along the curved surface, overcoming the pressure of the spring 5 to push the rotor 4 upward along the axis, and the hemispherical ball protrusion 441 is disengaged from the indexing positioning groove group 81.

[0063] Even when the rotor 4 rotates over a crest under the action of the magnetic force but does not rotate precisely to the trough position adjacent to the crest, the rotor 4 can slide to the trough position under the elastic force of the spring 5 and its own gravity, and engage with the concave holes on the indexing positioning groove group 81, thereby locking the rotor 4.

[0064] like Figure 11-17The figure shows a positioning tool for a hydrocephalus shunt valve according to the present invention. The positioning tool comprises a barrel 1101, a box 1102, a magnetic needle 1103, a main shaft 1104, and a transparent cover 1105. The box 1102 is offset from the outside of the barrel 1101 and the two are integrally connected. The main shaft 1104 is located on the inner bottom surface of the box 1102, and the magnetic needle 1103 is movably connected to the main shaft 1104. The transparent cover 1105 covers the box 1102. An indicator mark is provided on the edge of the top opening of the barrel 1101. During positioning, the shunt valve is implanted under the patient's skin. The skin around the skull is relatively thin, so the doctor can initially determine the valve's position by touch. Then, the positioning tool is rotated. Once the magnetic needle 1103 of the positioning tool aligns with the direction of the arrow in the indicator mark, the positioning tool has been accurately positioned. In order to ensure the working efficiency of the magnetic needle 1103 in the positioning tool, a permanent magnet 2 10 is also provided on the diverter valve inlet 1 to determine the position of the valve and the inlet.

[0065] To read the pressure, a pressure reading tool 13 is also included. This tool comprises a circular box 1301, a rotating pin 1302, a second magnetic needle 1303, and a second transparent cover 1304. The rotating pin 1302 is fixedly mounted within the circular box 1301, and the second magnetic needle 1303 is movably connected to the rotating pin 1302. The second transparent cover 1304 is located at the top of the circular box. The circular box has a lower step that mates with the inner opening of the cylinder 1101. The purpose of the pressure reading tool is to display the current opening pressure of the valve and to check the pressure setting after pressure adjustment. When in use, a positioning tool is required. After the positioning tool is positioned at the valve position, the pressure reading tool 13 is placed in the cylinder 1101 of the positioning tool, and then the pressure reading tool 13 is manually rotated, and the magnetic needle 1303 is observed until the pointer stops moving. The magnetic needle 1303 interacts with the magnetic pole in the diverter valve, and the N pole of the magnetic needle 1303 points to a certain value in the positioning tool indicator mark, which represents the pressure level of the diverter valve at this time.

[0066] To achieve pressure regulation, a pressure regulating tool 12 is also included. This tool comprises a regulating tool housing 1201, an electromagnet holder 1202, an adjusting electromagnet 1203, an adjusting tool end cap 1204, and an adjusting tool pointer. The electromagnet holder 1202 is fixedly mounted within the inner cavity of the regulating tool housing 1201, and the adjusting electromagnet 1203 is fixedly mounted on the electromagnet holder 1202. The regulating tool housing 1201 is provided with an adjusting tool end cap 1204, and the upper surface of the adjusting tool end cap 1204 is provided with an adjusting tool pointer. The pressure regulating tool 12 interacts with the permanent magnet 9 fixed to the diverter valve rotor 4, causing the diverter valve opening pressure to change.

[0067] It should be noted that the above-described specific embodiments are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that, based on the technical content disclosed in this application, various modifications, equivalent substitutions, and variations may be made to the present invention. However, as long as these modifications do not depart from the spirit of the present invention, they are intended to be within the scope of protection of the present invention. Furthermore, certain terms used in the specification and claims of this application are not intended to be limiting and are provided solely for ease of description.

Claims

1. A hydrocephalus shunt valve, comprising a valve body (8) and a valve cover (6), wherein the valve body (8) is provided with an inlet (1) and an outlet (7) at both ends thereof, and a valve ball (2) is provided in the inlet (1); characterized in that: A center pivot pin (83) is provided at the center of the bottom surface of the valve body (8), a circle of indexing positioning grooves (81) is provided on the periphery of the center pivot pin (83), and a bow spring assembly pivot pin (82) is also provided on the edge of the bottom surface of the valve body (8); A pressure regulating device is also provided in the valve body (8); the pressure regulating device comprises: a rotor (4) and a bow spring assembly (3); The rotor (4) is movably pivoted on the central rotating pin (83), retaining the freedom of rotation around the central rotating pin (83) and the freedom of axial movement; The top surface of the rotor (4) is provided with a cam platform (41), the bottom surface of the rotor (4) is provided with a pair of fan-shaped bosses (44), and the bottom surface of the fan-shaped bosses (44) is provided with a hemispherical convexity (441), and the hemispherical convexity (441) is adapted to a circle of the indexing positioning groove group (81); The bow spring assembly (3) comprises: a rotating sleeve (31), a bow spring leaf (32) and a rigid rod (33); the bow spring leaf (32) and the rigid rod (33) are fixedly connected to the sleeve of the rotating sleeve (31); the distal end of the rigid rod (33) abuts against the cam surface of the cam platform (41); and the distal end of the bow spring leaf (32) abuts against the valve port ball (2); A spring (5) is provided on the top surface of the rotor (4).

2. A hydrocephalus shunt valve according to claim 1, characterized in that: A rotor bottom cavity (45) is provided on the bottom surface of the rotor (4).

3. A hydrocephalus shunt valve according to claim 2, characterized in that: A positioning column (46) is provided in the cavity (45) at the bottom of the rotor and on the inner side of the sector-shaped boss (44).

4. A hydrocephalus shunt valve according to claim 3, characterized in that: A pair of limiting posts (84) for limiting the rotation range of the rotor (4) with the positioning posts (46) to 0-270° are provided on the bottom surface of the valve body (8).

5. The hydrocephalus shunt valve according to claim 1, characterized in that: A magnet receiving groove (42) is provided on the upper surface of the rotor (4), and a permanent magnet (9) is provided in the magnet receiving groove (42).

6. The hydrocephalus shunt valve according to claim 1, characterized in that: A circle of developing material accommodating grooves (85) is also provided on the periphery of the indexing positioning groove group (81).

7. The hydrocephalus shunt valve according to claim 1, characterized in that: The indexing positioning groove group (81) has an annular wave surface, and a ball socket adapted to the hemispherical convex (441) is provided at the center of the wave trough.

8. A positioning tool for a hydrocephalus shunt valve according to any one of claims 1 to 7, characterized in that: The positioning tool comprises a cylinder (1101), a box body (1102), a magnetic needle (1103), a main shaft (1104) and a transparent cover (1105), wherein the box body (1102) is offset on the outside of the cylinder (1101), the main shaft (1104) is arranged on the inner bottom surface of the box body (1102), the magnetic needle (1103) is movably connected to the main shaft (1104), and the transparent cover (1105) covers the box body (1102); an indicator mark is provided on the edge of the top surface of the cylinder (1101).

9. The positioning tool for a hydrocephalus shunt valve according to claim 8, characterized in that: The pressure reading tool (13) is also included, and the pressure reading tool (13) includes a round box (1301), a rotating pin (1302), a second magnetic needle (1303) and a second transparent cover (1304); the rotating pin (1302) is fixedly provided in the round box (1301), the second magnetic needle (1303) is movably connected to the rotating pin (1302), and the second transparent cover (1304) is provided at the top of the round box; the round box has a lower step circle, and the lower step circle is adapted to the inner cylinder opening of the cylinder (1101).

10. The positioning tool for a hydrocephalus shunt valve according to claim 8, characterized in that: The invention also includes a pressure regulating tool (12), the pressure regulating tool (12) comprising: a regulating tool housing (1201), an electromagnet bracket (1202), an regulating tool electromagnet (1203), an regulating tool end cover (1204) and an regulating tool pointer, wherein the inner cavity of the regulating tool housing (1201) is fixedly provided with the electromagnet bracket (1202), the electromagnet (1203) is fixedly provided on the electromagnet bracket (1202), the regulating tool end cover (1204) is provided on the regulating tool housing (1201), and the upper surface of the regulating tool end cover (1204) is provided with the regulating tool pointer.

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