Combined in-vitro navigation template for assisting sacroiliac screw implantation

Abstract

A combined in-vitro navigation template for assisting implantation of sacroiliac screws comprises a main navigation template, an auxiliary navigation template and a combined sleeve, one end of the main navigation template is connected with a positioning needle, the main navigation template is provided with a half first positioning sleeve and a first positioning hole, and the first positioning sleeve and the first positioning hole are located on the outermost side of the right end of the main template; the main navigation template is also provided with a second positioning sleeve and a second positioning hole, and the second positioning sleeve and the second positioning hole are located at the left upper part of the inner side of the first sleeve; the guide sleeve and the guide hole are positioned below the left end of the main template; and the auxiliary navigation template is provided with a half third positioning sleeve and a half third positioning hole, and the half positioning sleeves of the main navigation template and the half positioning sleeve of the auxiliary navigation template are sleeved and combined into a full navigation template through a combined sleeve. According to the utility model, the problem of inaccurate positioning in the prior art is solved, accurate navigation can be realized, operative wounds are reduced, a minimally invasive effect is achieved, and radiation exposure is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of medical instruments and relates to a fracture navigation template, in particular to a combined in vitro navigation template for assisting the placement of sacroiliac screws. Background Art

[0002] With the rapid development of 3D printing technology and the continuous updating of minimally invasive and digital orthopedic concepts, more and more people are applying 3D printing technology to the medical field. In clinical practice, due to sacral fractures or sacroiliac joint dislocations, it is often necessary to fix them, and some of them need to be firmly fixed by implanting sacroiliac screws. The traditional surgical operation method is to implant the guide needle first through C-arm intraoperative fluoroscopy and the surgeon's experience, observe the position of the guide needle through fluoroscopy, confirm that the guide needle is in a good position, and then implant the sacroiliac screw for fixation. However, the traditional method has the disadvantage of not being able to accurately implant the guide needle to the expected position in a short time, and requires multiple adjustments. Moreover, if the implantation is not accurate, the guide needle will pass through the cortex and is likely to injure the surrounding blood vessels or nerves and other soft tissues. Utility Model Content

[0003] The utility model aims to provide a combined navigation template, which solves the problem of inaccurate positioning in the prior art, can accurately navigate, reduce surgical trauma, play a minimally invasive role, and reduce radiation exposure.

[0004] In order to achieve the above purpose, the technical solution provided by the utility model is as follows:

[0005] A combined navigation template for assisting the insertion of sacroiliac screws, the navigation template comprising: a main navigation template, a secondary navigation template, and a combined sleeve, one end of the main navigation template is connected to a positioning needle to fix the template, and the main navigation template is provided with: half of a first positioning sleeve and a first positioning hole, which are located at the outermost side of the right end of the main template; the main navigation template is also provided with a second positioning sleeve and a second positioning hole, which are located at the upper left side of the inner side of the first sleeve; a guide sleeve and a guide hole, which are located at the lower left end of the main template plate; and a secondary navigation template, which is provided with half of a third positioning sleeve and half of a third positioning hole, and the half positioning sleeves of the main navigation template and the secondary navigation plate are combined into a full navigation template through the combined sleeve.

[0006] When in use, the second positioning hole of the main navigation template is passed through the positioning needle, half of the first positioning hole of the main navigation template is fitted with the positioning needle, and the half sleeves on the main template and the auxiliary template are connected together through the combined sleeve to form a full navigation template. The navigation template is fixed to the anterior superior iliac spine on the affected side through the positioning needle.

[0007] Preferably, the shape of the in vitro combined navigation template is obtained by drawing the outline of the navigation template on the epidermis of the target position, trimming and removing it using Boolean operations, and then 3D printing.

[0008] Among them, the combined sleeve is located at the farthest end of the main side after assembling each half of the positioning sleeves of the main navigation template and the auxiliary navigation template.

[0009] Preferably, the guide sleeve and guide hole provided on the main navigation template are determined according to the image features of the patient's CT data.

[0010] The utility model has the following significant effects:

[0011] (1) The combined navigation template of the utility model solves the problem that the traditional sacroiliac screw implantation position is inaccurate and needs multiple adjustments;

[0012] (2) The combined navigation template of the utility model extends the stable bone landmarks in the body to the outside of the body through the positioning needle, avoiding the traditional large-area incision to implant sacroiliac screws through fluoroscopy or experience, and at the same time avoiding the in-vivo navigation template from stripping off a lot of bone surface soft tissue, causing greater surgical trauma. The positioning needle firmly fixes the guide plate on the anterior superior iliac spine to achieve precise positioning;

[0013] (3) The combined navigation guide plate of the utility model realizes precise positioning through two positioning holes and one guide hole;

[0014] (4) The combined navigation guide plate of the utility model plays an auxiliary positioning role by using the positioning needle, and on the other hand, avoids surgical damage caused by excessive incision. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the main navigation template of the utility model.

[0016] Figure 2 This is the main navigation template of this utility model Figure 1 Schematic diagram of the structure on the back side.

[0017] Figure 3 It is a structural schematic diagram of the secondary navigation template of the present utility model.

[0018] Figure 4 It is a schematic diagram of the combined sleeve structure of the utility model.

[0019] Figure 5 This is a structural schematic diagram of the utility model in which the main navigation template and the auxiliary navigation template are assembled into one by a combined sleeve.

[0020] In the figure: 1-guide hole, 2-guide sleeve, 3-main navigation template, 4-half of the first positioning hole, 5-half of the first positioning sleeve, 6-second positioning hole, 7-second positioning sleeve, 8-auxiliary navigation template, 9-half of the third positioning sleeve, 10-half of the third positioning hole, 11-combined casing, 12-casing hole. DETAILED DESCRIPTION

[0021] The specific implementation of the utility model is further described in conjunction with the accompanying drawings.

[0022] A combined in vitro navigation guide for assisting sacroiliac screw placement, such as Figure 1-Figure 5 As shown, the navigation template includes: a main navigation template 3, a secondary navigation template 8 and a combined sleeve 11. One end of the main navigation template 3 is connected to a positioning pin for fixing the template, and the main navigation template 3 is provided with: half of a first positioning sleeve 5 and a first positioning hole 4, which are located at the outermost side of the right end of the main navigation template 3; the main navigation template 3 is also provided with a second positioning sleeve 7 and a second positioning hole 6, which are located at the upper left side of the inner side of the half first positioning sleeve 5; a guide sleeve 2 and a guide hole 1, which are located at the lower left end of the main navigation template 3; the secondary navigation template 8 is provided with half of a third positioning sleeve 9 and half of a third positioning hole 10, and the half positioning sleeves of the main navigation template 3 and the secondary navigation plate 8 are combined into a complete navigation template through the combined sleeve 11.

[0023] The form of the combined navigation template is obtained by drawing the outline of the navigation template on the epidermis of the target position, trimming and removing it using Boolean operations, and then 3D printing.

[0024] The main navigation template 3 is also provided with a guide hole 1, and the position of the guide hole 1 is determined according to the image features of the patient's CT data.

[0025] The shape of the in vitro combined navigation template is obtained by drawing the outline of the navigation template on the epidermis of the target position, trimming and removing it using Boolean operations, and then 3D printing.

[0026] When in use, the positioning needle is passed through the second positioning hole 6 of the main navigation template 3, and half of the first positioning hole 4 of the main navigation template 3 is fitted with the positioning needle. The half tube sets on the main navigation template 3 and the auxiliary navigation template 8 are connected together through the combined sleeve 11 to form a complete navigation template; the navigation template is fixed to the anterior superior iliac spine on the affected side through the positioning needle.

[0027] The second positioning hole 6 of the main navigation template 3 is passed through the positioning needle, and the half of the first positioning hole 4 of the main navigation template is fitted with the positioning needle. The main navigation template 3 and the half of the first sleeve 8 on the auxiliary navigation template are combined together through the combined sleeve 11 to form a complete navigation template. The navigation template is fixed to the anterior superior iliac spine on the affected side by the positioning needle.

[0028] In summary, the combined navigation guide plate of the utility model can accurately navigate, reduce surgical trauma, play a minimally invasive role, and reduce radiation exposure.

[0029] Although the content of the utility model has been described in detail through the above preferred embodiments, it should be recognized that the above description should not be considered as a limitation of the utility model. After reading the above content, various modifications and substitutions of the utility model will be obvious to those skilled in the art. Therefore, the protection scope of the utility model should be defined by the attached claims.

Claims

1. A combined in vitro navigation template for assisting sacroiliac screw implantation, characterized in that: The combined in vitro navigation template comprises: a main navigation template (3), a secondary navigation template (8) and a combined sleeve (11); one end of the main navigation template (3) is connected to a positioning pin for fixing the template; the main navigation template (3) is provided with: half of a first positioning sleeve (5) and a first positioning hole (4), which are located at the outermost side of the right end of the main navigation template (3); the main navigation template (3) is also provided with a second positioning sleeve (7) and a second positioning hole (6), which are located at the upper left side of the inner side of the half first positioning sleeve (5); a guide sleeve (2) and a guide hole (1), which are located at the lower left end of the main navigation template (3); and the secondary navigation template (8) is provided with half of a third positioning sleeve (9) and half of a third positioning hole (10); the combined sleeve (11) is used to combine the half positioning sleeves of the main navigation template (3) and the secondary navigation template (8) into a full navigation template; the morphology of the combined in vitro navigation template is obtained by 3D printing by drawing a navigation template contour on the epidermis of a target position and trimming and removing it using Boolean operations.

2. The combined in vitro navigation template for assisting sacroiliac screw implantation according to claim 1, characterized in that: The main navigation template (3) is also provided with a guide hole (1), and the position of the guide hole (1) is determined according to the image features of the patient's CT data.

3. A combined in vitro navigation template for assisting sacroiliac screw implantation according to claim 1 or 2, characterized in that: When in use, the second positioning hole (6) of the main navigation template (3) is passed through a positioning needle, half of the first positioning hole (4) of the main navigation template (3) is fitted with the positioning needle, and the half tubes on the main navigation template (3) and the auxiliary navigation template (8) are connected together through a combined sleeve (11) to form a complete navigation template; The navigation template is fixed to the anterior superior iliac spine on the affected side through positioning pins.

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