External ventricular drainage craniotomy frame

Abstract

This invention discloses a fixation frame for external ventricular drainage cranial bone window, comprising a base and a support. The base has a through-hole at its end and also has a slot and a groove. A reinforcing plate is fixed to the base, and a through-slot is provided at the corresponding position of the reinforcing plate and the groove. The support has a locking block and a tube passage hole, and the locking block has a positioning hole. The locking block is inserted into the slot, and the end of the base with the fixation hole is embedded in the inner edge of the bone window and fixed to the cranial bone window by screws. This invention has a simple structure, low manufacturing cost, and can effectively fix the drainage tube, thus meeting current surgical needs. In addition, this invention has great benefits for the treatment and promotion of ventriculoperitoneal drainage in hydrocephalus, improving the difficulty of fixing the drainage tube and the problem of closing the cranial bone window in this surgery, and has great clinical application value and application prospects.

Description

Technical Field

[0001] This invention relates to medical devices, and in particular to a cranial bone window fixation frame for external ventricular drainage. Background Technology

[0002] Hydrocephalus has many causes, the most important being abnormalities in cerebrospinal fluid (CSF) secretion and absorption, and obstruction of CSF circulation pathways. If timely treatment is not administered, the ventricles may gradually enlarge. Currently, CSF shunt surgery is commonly used clinically to treat this condition, restoring normal CSF secretion or increasing fluid drainage. Ventriculoperitoneal shunt surgery is the simplest and most effective method for treating hydrocephalus. Postoperative clinical outcomes after ventriculoperitoneal shunt surgery are better than those after lumbar ventriculoperitoneal shunt surgery, improving postoperative quality of life, promoting cognitive and mental recovery, and preventing complications, demonstrating significant clinical value.

[0003] However, among existing ventriculoperitoneal drainage devices, both domestically and internationally, there is currently no safe and effective component capable of both closing the cranial bone window and fixing the external ventricular drainage tube. An unclosed cranial bone window is a significant source of secondary intracranial and extracranial infections, and uncontrolled movement of the drainage tube can lead to complications such as tube blockage and secondary intracranial hemorrhage. Therefore, closing the cranial bone window and fixing the external ventricular drainage tube are crucial steps in ventriculoperitoneal drainage. Currently, the only method used is to close the bone window with titanium plates and press the drainage tube down to fix it. This method is costly and has poor drainage tube fixation. Summary of the Invention

[0004] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a cranial bone window fixation frame for external ventricular drainage, which has a simple structure, low cost and can better fix the drainage tube.

[0005] To achieve the above objectives, the present invention provides a cranial bone window fixation frame for external ventricular drainage, comprising a base and a support. The base has a through fixing hole at its end, and also has a slot and a groove on the base. A reinforcing plate is fixed on the base, and a through groove is provided at the corresponding position of the reinforcing plate and the groove. The support has a locking block and a tube hole, and the locking block has a positioning hole. The locking block is inserted into the slot, and one end of the base with the fixing hole is embedded into the inner edge of the bone window and fixed to the cranial bone window by screws.

[0006] Preferably, the base is C-shaped.

[0007] Preferably, the cross-section of the groove gradually increases from the open end to the closed end.

[0008] Preferably, a positioning rod is fixed inside the slot, and the positioning rod passes through the positioning hole.

[0009] Preferably, it also includes a pressure plate, one end of which is provided with a buckle hole and a clearance groove, and the other end is provided with a second hinge cylinder, the base and the first hinge cylinder, and the rotating shaft passes through the first hinge cylinder and the second hinge cylinder;

[0010] The clearance groove is used to facilitate the passage of the positioning rod, and the pressure plate and the end face of the clamping plate are pressed together; spring buckles are fixed at both ends of the clearance groove, and the spring buckles are made of elastic material and their ends are pressed together with the end face of the clamping plate.

[0011] Preferably, one end of the buckle hole is connected to the conical hole, and the diameter of the conical hole gradually decreases from the end away from the buckle hole to the end connected to the buckle hole; the buckle cylinder is provided with a buckle head, one end of which passes through the buckle hole and its inner side is pressed against the end face of the pressure plate, and the other end of the buckle cylinder is assembled and fixed to the base.

[0012] Preferably, the buckle cylinder includes a connecting ring and a buckle strip. The two ends of the buckle strip are respectively connected and fixed to the connecting ring and the buckle head. The buckle strip is elastic, and in its initial state, the distance from the axis from the connecting ring end to the buckle head end gradually increases.

[0013] Preferably, the base is also provided with a threaded hole, one end of the extrusion screw passes through the buckle cylinder and is screwed into the threaded hole, the other end of the extrusion screw is located outside the buckle cylinder, and a tapered part is provided at the assembly point of the extrusion screw and the buckle cylinder, the diameter of the tapered part gradually increases from the end of the buckle head near the connecting ring.

[0014] Preferably, the buckle head is provided with a driving slope, which can fit against the inner wall of the conical hole.

[0015] Preferably, a through groove communicating with the through groove is provided on the reinforcing plate, and a fixing groove is provided on the inner wall of the through groove. The fixing groove is clamped and fixed to one end of the spring sheet, and a pull plate is fixed to the other end of the spring sheet. The spring sheet is an arc-shaped plate that bends toward the through groove; the pull plate extends out of the through groove.

[0016] The beneficial effects of this invention are: the invention has a simple structure, low manufacturing cost, and can effectively fix the drainage tube, thus meeting current surgical needs. Furthermore, this invention has significant benefits for the treatment and promotion of ventriculoperitoneal drainage in hydrocephalus, improving the difficulty of drainage tube fixation and cranial bone window closure in this surgery, and possesses great clinical application value and promising prospects. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of Embodiment 1.

[0018] Figure 2 This is a schematic diagram of the structure of Embodiment 1.

[0019] Figure 3This is a schematic diagram of the structure of Embodiment 1.

[0020] Figure 4 This is a schematic diagram of the structure of Embodiment 2.

[0021] Figure 5 This is a schematic diagram of the structure of Embodiment 2.

[0022] Figure 6 This is a schematic diagram of the structure of Embodiment 2.

[0023] Figure 7 This is a schematic diagram of the buckle cylinder structure in Embodiment 2.

[0024] Figure 8 This is a schematic diagram of the structure of Embodiment 2.

[0025] Figure 9 This is a schematic diagram of the structure of Embodiment 2.

[0026] Figure 10 This is a schematic diagram of the pressure plate and spring buckle structure in Example 2.

[0027] Figure 11 This is a schematic diagram of the structure of Embodiment 2. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0029] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] Example 1

[0031] See Figures 1-3 An external ventricular drainage cranial bone window fixation frame includes a base 100 and a support 200. The base 100 is C-shaped and has a through fixing hole 101 at its end. The base 100 also has a slot 102 and a groove 103. A reinforcing plate 400 is fixed on the base 100, and a through groove 401 is provided at the corresponding position of the reinforcing plate 400 and the groove 103. The support 200 has a locking block 210 and a tube hole 201. The locking block 210 has a positioning hole 211.

[0032] The card block 210 is inserted into the card slot 102, thereby realizing the assembly and fixation of the bracket 200 and the base 100. The base 100 is provided with a fixing hole 101, one end of which is embedded into the inner edge of the bone window and fixed to the skull bone window by a screw (the screw passes through the fixing hole 101 and is assembled and fixed to the skull bone window). This can repair the bone window and provide a fixed base for the bracket 200. After the bracket 200 is fixed on the base 100, its tube hole 201 allows the puncture needle and drainage tube to pass through, thereby facilitating puncture and insertion of the drainage tube.

[0033] In use, the reinforcing plate 400 fits against the skull, so that the opening of the groove 103 faces outward. The drainage tube passes through the through hole 201 and is then secured in the groove 103, and then arranged along the scalp, thereby fixing the drainage tube and preventing it from loosening. Specifically, the drainage tube is bent in half and the bent part is inserted into the through groove 401, and then the other end is led out through the groove 103, thus providing space for later adjustment of the drainage tube.

[0034] Preferably, the cross-section of the groove 103 gradually increases from the open end to the closed end, so as to facilitate the insertion of the drainage tube and prevent the drainage tube from falling out of the groove 103.

[0035] Preferably, a positioning rod 310 is fixed inside the slot 102, and the positioning rod 310 passes through the positioning hole 211 to position and fix the bracket 200. This design can determine the position of the through hole 201 and avoid difficulties in leading out the drainage tube due to its uncertain position.

[0036] Example 2

[0037] See Figures 4-11 In order to facilitate the fixing of the card block 210, the applicant also designed a pressure plate 510. One end of the pressure plate 510 is provided with a buckle hole 513 and a clearance groove 512, and the other end is provided with a second hinge tube 511. The base 100 and the first hinge tube 110, the pivot 530 passes through the first hinge tube 110 and the second hinge tube 511, so that the first hinge tube 110 and the second hinge tube 511 are hinged by the pivot 530.

[0038] The clearance groove 512 is used to facilitate the passage of the positioning rod 310, and the pressure plate 510 is pressed against the end face of the clamping plate 210, thereby clamping the clamping plate 210 in the clamping groove 102; spring buckles 520 are fixed at both ends of the clearance groove 512, and the spring buckles 520 are made of elastic material and their ends are pressed against the end face of the clamping plate 210, thereby clamping and fixing the pressure plate.

[0039] One end of the buckle hole 513 is connected to the conical hole 514. The diameter of the conical hole 514 gradually decreases from the end away from the buckle hole 513 to the end connected to the buckle hole 513. The buckle cylinder 610 is provided with a buckle head 613. One end of the buckle head 613 passes through the buckle hole 513 and its inner side is pressed against the end face of the pressure plate 510. The other end of the buckle cylinder 610 is assembled and fixed to the base 100.

[0040] The buckle cylinder 610 includes a connecting ring 611 and a buckle strip 612. The two ends of the buckle strip 612 are respectively connected and fixed to the connecting ring 611 and the buckle head 613. The buckle strip 612 is elastic. In its initial state, the distance from the axis from one end of the connecting ring 611 to the end of the buckle head 613 increases. As a result, after it passes through the buckle hole 513, the buckle head 613 opens up under the elastic action of the buckle strip 612 so that the inner side of the buckle head 613 is locked with the end face of the pressure plate 510.

[0041] Preferably, the base 100 is further provided with a threaded hole 104. One end of the pressing screw 620 passes through the snap-fit ​​cylinder 610 and is screwed into the threaded hole 104. The other end of the pressing screw 620 is located outside the snap-fit ​​cylinder 610, and a tapered portion 621 is provided at the assembly point of the pressing screw 620 and the snap-fit ​​cylinder 610. The diameter of the tapered portion 621 gradually increases from the end near the snap-fit ​​head 613 of the connecting ring 611. In use, the degree to which the snap-fit ​​strip 612 is fixedly opened can be adjusted by adjusting the assembly depth of different parts of the tapered portion 621 with the snap-fit ​​cylinder 610, thereby adjusting the fixing force of the snap-fit ​​cylinder 610 on the pressure plate.

[0042] Preferably, the buckle head 613 is provided with a driving inclined surface 614, which can fit against the inner wall of the tapered hole 514 to squeeze the buckle strip 612, thereby facilitating the buckle head 613 to pass through the buckle hole 513.

[0043] Preferably, to facilitate the clamping of the drainage tube by the through groove 401, a through groove 402 communicating with the through groove 401 can be provided on the reinforcing plate 400, and a fixing groove 403 is provided on the inner wall of the through groove 401. The fixing groove 403 is clamped and fixed to one end of the spring plate 320, and a pull plate portion 321 is fixed to the other end of the spring plate 320. The spring plate 320 is an arc-shaped plate that bends towards the through groove 401. In use, the drainage tube is clamped in the through groove 401 by the elastic force of the spring plate 320, thereby better fixing the drainage tube.

[0044] The pull plate portion 321 extends through the through groove 402, thereby facilitating the pulling of the spring sheet 320. In use, the spring sheet 320 can be pulled out through the pull plate portion 321, then the drainage tube can be placed, and then the spring sheet 320 can be released, so that the spring sheet 320 can clamp the drainage tube by its own elasticity.

[0045] Any aspects of this invention not described in detail are well-known to those skilled in the art.

[0046] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. External ventricular drainage cranial bone window fixation frame, characterized by: The device includes a base and a support. The base has a through fixing hole at its end and also has a slot and a groove. A reinforcing plate is fixed to the base, and a through slot is provided at the corresponding position of the reinforcing plate and the groove. The support has a locking block and a through hole. The locking block has a positioning hole. The locking block is inserted into the slot. One end of the base with a fixing hole is embedded into the inner edge of the bone window and fixed to the skull bone window by screws. The cross-section of the groove gradually increases from the open end to the closed end; A positioning rod is fixed inside the slot, and the positioning rod passes through the positioning hole; It also includes a pressure plate, one end of which is provided with a buckle hole and a clearance groove, and the other end is provided with a second hinge cylinder. The base is provided with a first hinge cylinder, and the rotating shaft passes through the first hinge cylinder and the second hinge cylinder. The clearance groove is used to facilitate the passage of the positioning rod, and the pressure plate is pressed against the end face of the locking block; spring buckles are fixed at both ends of the clearance groove, and the spring buckles are made of elastic material and their ends are pressed against the end face of the locking block. One end of the buckle hole is connected to the conical hole, and the diameter of the conical hole gradually decreases from the end away from the buckle hole to the end connected to the buckle hole; the buckle tube is provided with a buckle head, one end of which passes through the buckle hole and its inner side is pressed against the end face of the pressure plate, and the other end of the buckle tube is assembled and fixed to the base. The buckle cylinder includes a connecting ring and a buckle strip. The two ends of the buckle strip are respectively connected and fixed to the connecting ring and the buckle head. The buckle strip is elastic, and in its initial state, the distance from the axis from the connecting ring end to the buckle head end increases. The base is also provided with a threaded hole. One end of the extrusion screw passes through the snap-fit ​​cylinder and is screwed into the threaded hole. The other end of the extrusion screw is located outside the snap-fit ​​cylinder. A tapered part is provided at the assembly point of the extrusion screw and the snap-fit ​​cylinder. The diameter of the tapered part gradually increases from the end near the connecting ring to the snap-fit ​​head end. The buckle head is provided with a driving slope, which can fit against the inner wall of the tapered hole; A through groove communicating with the through slot is provided on the reinforcing plate, and a fixing groove is provided on the inner wall of the through groove. The fixing groove is clamped and fixed to one end of the spring sheet, and a pull plate is fixed to the other end of the spring sheet. The spring sheet is an arc-shaped plate that bends toward the through groove; the pull plate extends out of the through groove.

2. The external ventricular drainage cranial bone window fixation frame as described in claim 1, characterized in that: The base is C-shaped overall.

Images