Giliac posterior column screw guider

Abstract

The utility model discloses a posterior iliac column screw guider, which comprises a fitting base, a screw rod, a screw rod, a screw rod, a screw rod, a screw rod, a screw rod, a screw rod, a screw rod, a screw rod, a screw rod, a screw rod, a screw rod, a screw rod and a screw rod, the sliding base is embedded into the sliding groove, can slide along the sliding groove and is provided with a threaded hole aligned with the via hole; the center of the guide cylinder is provided with a guide channel, the middle of the guide cylinder penetrates through the via hole, the bottom of the guide cylinder is provided with a threaded shaft matched with the threaded hole, and the peripheral wall of the guide cylinder is provided with a clamping ring which is located above the via hole and has the diameter larger than the width of the via hole. The sliding base slides along the sliding groove, and the guide cylinder is arranged on the sliding base, so that the guide cylinder can slide to adjust the position, and the flexibility and adaptability of an operation are improved; the guide channel of the guide cylinder ensures that the screw is accurately placed along a preset path, and the accuracy of the operation is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical supplies technical field, in particular, relate to a screw guider for posterior column of ilium. BACKGROUND

[0002] Posterior column of ilium fracture is a common type of pelvic fracture, for this type of fracture, surgical treatment is a commonly used treatment method. The existing operation internal fixation method for posterior column of ilium fracture is one traditional open reduction internal fixation surgery, the clinical common is using 6 hole or 8 hole steel plate fixation, this method can provide good reduction field of vision, also can be relatively firm fixed posterior column of ilium fracture, but due to its usually need larger incision, this can lead to larger tissue damage and longer recovery time, and in the patient fracture recovery. The operation needed to remove the operation fixed guide plate is relatively complex, and the incision is relatively large, so it can be accompanied by complications such as infection, bleeding, nerve injury or blood vessel injury, causing secondary injury to the patient. Another method is minimally invasive surgery, that is, using a lag screw to fix the fractured posterior column of ilium with minimal trauma. This way does not require a large incision, reducing surgical trauma and avoiding the shortcomings of guide plate fixation to some extent. Under the guidance of imaging, the surgeon will accurately place the screw on the fracture line of the posterior column of ilium to fix the fracture and promote healing. Usually, through the preoperative image data of the patient's pelvis, a personalized guide plate based on the patient's pelvic parameters is designed using three-dimensional reconstruction software to achieve screw introduction, but the screw placement position is usually fixed and inconvenient to adjust. SUMMARY

[0003] The utility model aims at least solves one of the prior art technical problems. To this end, the utility model provides a screw guider for posterior column of ilium.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A screw guider for posterior column of ilium, comprising: a fitting base provided with a sliding groove, the top of the sliding groove is provided with a through hole with a width smaller than the sliding groove, and the bottom of the sliding groove is provided with a through hole aligned with the through hole; a sliding base embedded in the sliding groove and capable of sliding along the sliding groove, provided with a threaded hole aligned with the through hole; a guide cylinder provided with a guide channel in the center, the middle part is provided in the through hole, the bottom of the guide cylinder is provided with a threaded shaft matched with the threaded hole, and the outer peripheral wall of the guide cylinder is provided with a clamping ring located above the through hole and having a diameter larger than the width of the through hole.

[0006] Further, a first pad is provided between the sliding base and the top wall of the sliding groove, the first pad is provided with a first avoiding hole for the bottom of the guide cylinder to pass through, the upper end of the first pad is attached to the top wall of the sliding groove, and the bottom is attached to the sliding base.

[0007] Furthermore, the outer side of the fitting base is provided with a raised thickened portion corresponding to the sliding groove, and the sliding groove is at least partially formed in the thickened portion.

[0008] Furthermore, a second pad is provided between the upper end of the thickened part and the clamping ring. The second pad is provided with a second clearance hole for the guide cylinder to pass through. The upper end face of the second pad is in contact with the clamping ring, and the lower end face is in contact with the upper end face of the thickened part.

[0009] Furthermore, the second pad is made of rubber or silicone.

[0010] Furthermore, the sliding groove and the through hole are provided with an opening at one end.

[0011] Furthermore, the upper end of the clamping ring is provided with a polygonal post.

[0012] Furthermore, each end of the via has a connecting block, and the sidewalls on opposite sides of the two connecting blocks are the two end walls of the via.

[0013] Furthermore, a positioning cylinder is provided on the outer side of the bonding base, and the positioning cylinder has a positioning hole that penetrates the positioning cylinder and the bonding base.

[0014] Furthermore, the positioning cylinder and positioning hole are provided in multiple ways.

[0015] This utility model has the following beneficial effects:

[0016] The sliding base slides along the sliding groove, and the guide cylinder is installed on the sliding base, allowing the guide cylinder to slide and adjust its position. This enables the surgeon to make fine adjustments during surgery according to the actual situation to adapt to different patients' anatomical structures and fracture conditions, improving the flexibility and adaptability of the surgery. The guide channel of the guide cylinder ensures that the screw is accurately inserted along the predetermined path, improving the accuracy of the surgery. The threaded shaft at the bottom of the guide cylinder is threadedly connected to the threaded hole of the sliding base, and the clamping ring clamps the top wall of the sliding groove with the sliding base, thus providing a stable fixation method for the guide cylinder and ensuring that the screw does not shift during insertion.

[0017] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0019] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 yes Figure 1 A schematic diagram of the decomposed state structure;

[0021] Figure 3 This is a schematic diagram of the decomposed state of a partial structure;

[0022] Figure 4 This is a partial sectional view of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure that fits the base.

[0024] Legend:

[0025] Fitting base 100, sliding groove 110, through hole 111, through hole 112, connecting block 113, thickened part 120, positioning cylinder 130, positioning hole 131;

[0026] Sliding base 200, threaded hole 210;

[0027] Guide cylinder 300, guide channel 310, threaded shaft 320, clamping ring 330, polygonal column 331;

[0028] First pad 400, first clearance hole 410;

[0029] Second pad 500, second clearance hole 510. Detailed Implementation

[0030] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0033] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0034] Please refer to Figure 1 and Figure 2 The posterior column screw guide of the iliac bone in a preferred embodiment of the present invention includes a fitting base 100, a sliding base 200 and a guide cylinder 300.

[0035] The fitting base 100 is provided with a sliding groove 110. The inner surface of the fitting base 100 is used for human body fitting. The contour of the inner surface of the fitting base 100 can be adjusted according to the specific body shape of the patient. The contour of the inner surface can be formed by computer-aided 3D printing. The top of the sliding groove 110 is provided with a through hole 111 with a width smaller than the sliding groove 110, and the bottom of the sliding groove 110 is provided with a perforation 112 aligned with the through hole 111. The extension direction and path of the through hole 111 and the perforation 112 at least partially follow the sliding groove 110.

[0036] The sliding base 200 is embedded in the sliding groove 110 and can slide along the sliding groove 110. The sliding base 200 is provided with a threaded hole 210 aligned with the through hole 111. It can be understood that the outer periphery of the sliding base 200 is a regular polygon. In order to limit the sliding base 200, the widths of the through hole 111 and the through hole 112 are both smaller than the diameter of the inscribed circle of the sliding base 200. The through hole 112 allows the screw to pass through the fitting base 100 and enter the human body.

[0037] The guide cylinder 300 has a guide channel 310 at its center, and the guide cylinder 300 passes through the through hole 111 in the middle. The bottom of the guide cylinder 300 has a threaded shaft 320 that matches the threaded hole 210. The outer peripheral wall of the guide cylinder 300 has a clamping ring 330 located above the through hole 111 and with a diameter larger than the width of the through hole 111. The threaded shaft 320 is threadedly connected to the threaded hole 210. The top wall of the sliding groove 110 is clamped and fixed by the sliding base 200 and the clamping ring 330, thereby fixing the position of the guide cylinder 300. When it is necessary to adjust the position of the guide cylinder 300, simply loosen the guide cylinder 300, slide it along the sliding groove 110 to adjust it to the desired position, and then tighten the guide cylinder 300.

[0038] In a preferred embodiment of this invention, an iliac posterior column screw guide is provided. A sliding base 200 slides along a sliding groove 110, and a guide cylinder 300 is mounted on the sliding base 200. This allows the guide cylinder 300 to be adjusted in position, enabling surgeons to make fine adjustments during surgery to adapt to different patients' anatomical structures and fracture conditions, thus improving surgical flexibility and adaptability. The guide channel 310 of the guide cylinder 300 ensures precise screw insertion along a predetermined path, improving surgical accuracy. The threaded shaft at the bottom of the guide cylinder 300 is threadedly connected to the threaded hole 210 of the sliding base 200, and the clamping ring 330 clamps the top wall of the sliding groove 110, providing a stable fixation for the guide cylinder 300 and ensuring that the screw does not shift during insertion. Compared to traditional surgery, this simplifies the surgical procedure, reduces surgical and postoperative recovery time, and the precise insertion and removal of the screw reduces the complexity and risk of removing the surgical fixation guide plate, lowering the risk of secondary surgery.

[0039] Reference Figures 2 to 4 In some embodiments of this utility model, a first pad 400 is provided between the sliding base 200 and the top wall of the sliding groove 110. The first pad 400 is provided with a first clearance hole 410 for the bottom of the guide cylinder 300 to pass through. The upper end of the first pad 400 is in contact with the top wall of the sliding groove 110, and the bottom is in contact with the sliding base 200, thereby improving the fit between the components. Usually, the base 100 is a curved structure, the extension path of the sliding groove 110 is a curve, and the top wall of the sliding groove 110 is also usually curved. Therefore, the fit between the sliding base 200 and the top wall of the sliding groove 110 can be improved by the first pad 400, making the installation more stable. The top surface of the first pad 400 can be set as a curved surface that is adapted to the top wall of the sliding groove 110.

[0040] Of course, in some other embodiments, the first pad 400 may also be made of an elastically deformable material, such as rubber or silicone, thereby improving the tightness between the components and the connection stability.

[0041] Reference Figure 1 and Figure 2 In some embodiments of this utility model, the outer side of the fitting base 100 is provided with a raised thickened portion 120 corresponding to the sliding groove 110. The sliding groove 110 is at least partially formed in the thickened portion 120. In this embodiment, the sliding groove 110 is partially formed in the fitting base 100 and partially formed in the thickened portion 120. The thickened portion 120 allows the sliding groove 110 to have sufficient space to be arranged while the thickness of the fitting base 100 remains unchanged. Moreover, the thickened portion 120 protrudes from the outer side of the fitting base 100 and does not affect the inner side of the fitting base 100 from fitting with the human body.

[0042] Reference Figures 2 to 4In some embodiments of this utility model, a second pad 500 is provided between the upper end of the thickened portion 120 and the clamping ring 330. The second pad 500 has a second clearance hole 510 for the guide cylinder 300 to pass through. The upper end face of the second pad 500 is in contact with the clamping ring 330, and the lower end face is in contact with the upper end face of the thickened portion 120, thereby reducing the installation gap between the structures. Specifically, the second pad 500 is made of rubber or silicone, thus having good elastic deformation capability, which allows it to adapt to the surface of the component, thereby achieving contact with the upper end of the thickened portion 120 and the surface of the clamping ring 330, improving the contact tightness between the components, improving the stability of the connection, and the second pad 500 can provide pre-tightening force after elastic deformation, further improving the installation stability.

[0043] Reference Figure 5 In some embodiments of this utility model, the sliding groove 110 and the through hole 111 are open at one end, so that during installation, the guide cylinder 300, the first pad 400 and the sliding base 200 can be directly inserted into the sliding groove 110 and the through hole 111 through the opening. During installation, the guide cylinder 300, the first pad 400 and the sliding base 200 are connected together. The guide cylinder 300 is threadedly connected to the sliding base 200, and the first pad 400 is inserted into the sliding groove 110 through the opening as a whole. After reaching the required position, the guide cylinder 300 is tightened, which is convenient for installation.

[0044] Reference Figure 3 In some embodiments of this utility model, the upper end of the clamping ring 330 is provided with a polygonal post 331, which makes it convenient to turn the guide cylinder 300 with tools or by hand.

[0045] Reference Figure 5 In some embodiments of this utility model, each end of the through hole 111 has a connecting block 113. The sidewalls of the two connecting blocks 113 on opposite sides are the two end walls of the through hole 111, thereby preventing the two ends of the bonding base 100 from being separated by the through hole 111, which would cause the two sides of one end of the bonding base 100 to be completely separated, resulting in a decrease in the overall structural strength of the bonding base 100. The two connecting blocks 113 ensure that at least one connecting block 113 connects the two sides of the bonding base 100, thereby improving the structural strength of the bonding base 100.

[0046] Reference Figure 1 In some embodiments of this utility model, a positioning cylinder 130 is provided on the outer side of the fitting base 100. The positioning cylinder 130 has a positioning hole 131 that penetrates the positioning cylinder 130 and the fitting base 100. A positioning pin can be driven into the positioning hole 131 to fix the fitting base 100 to the human body.

[0047] Reference Figure 1In a further embodiment of this utility model, the positioning cylinder 130 and the positioning hole 131 are provided in multiple ways, so that the position and number of the positioning hole 131 can be selected according to the needs and actual situation to drive in the positioning nail.

[0048] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A posterior column screw guide for the iliac bone, characterized in that, include: The base (100) is provided with a sliding groove (110). The top of the sliding groove (110) is provided with a through hole (111) with a width smaller than the sliding groove (110). The bottom of the sliding groove (110) is provided with a through hole (112) aligned with the through hole (111). The sliding base (200) is embedded in the sliding groove (110) and can slide along the sliding groove (110), and has a threaded hole (210) aligned with the through hole (111); The guide cylinder (300) has a guide channel (310) in the center and passes through the through hole (111) in the middle. The bottom of the guide cylinder (300) is provided with a threaded shaft (320) that is adapted to the threaded hole (210). The outer peripheral wall of the guide cylinder (300) is provided with a clamping ring (330) located above the through hole (111) and with a diameter greater than the width of the through hole (111).

2. The posterior column screw guide of the iliac bone according to claim 1, characterized in that, A first pad (400) is provided between the sliding base (200) and the top wall of the sliding groove (110). The first pad (400) is provided with a first clearance hole (410) for the bottom of the guide cylinder (300) to pass through. The upper end of the first pad (400) is in contact with the top wall of the sliding groove (110), and the bottom is in contact with the sliding base (200).

3. The posterior iliac column screw guide according to claim 1 or 2, characterized in that, The outer side of the bonding base (100) is provided with a raised thickened portion (120) corresponding to the sliding groove (110), and the sliding groove (110) is at least partially formed in the thickened portion (120).

4. The posterior column screw guide for the iliac bone according to claim 3, characterized in that, A second pad (500) is provided between the upper end of the thickened part (120) and the clamping ring (330). The second pad (500) is provided with a second clearance hole (510) for the guide cylinder (300) to pass through. The upper end face of the second pad (500) is in contact with the clamping ring (330), and the lower end face is in contact with the upper end face of the thickened part (120).

5. The posterior column screw guide of the iliac bone according to claim 4, characterized in that, The second pad (500) is made of rubber or silicone.

6. The posterior column screw guide of the iliac bone according to claim 1, characterized in that, The sliding groove (110) and the through hole (111) are both open at one end.

7. The posterior column screw guide for the iliac bone according to claim 1, characterized in that, The clamping ring (330) has a polygonal post (331) at its upper end.

8. The posterior column screw guide of the iliac bone according to claim 1, characterized in that, Each end of the via (111) has a connecting block (113), and the sidewalls of the two connecting blocks (113) on opposite sides are the two end walls of the via (111).

9. The posterior column screw guide of the iliac bone according to claim 1, characterized in that, The outer side of the bonding base (100) is provided with a positioning cylinder (130), and the positioning cylinder (130) has a positioning hole (131) that penetrates the positioning cylinder (130) and the bonding base (100).

10. The posterior column screw guide of the iliac bone according to claim 9, characterized in that, The positioning cylinder (130) and positioning hole (131) are provided in multiple ways.

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