Sleeve-mediated internal fixation bone transport system

Abstract

The utility model belongs to the technical field of bone moving, specifically is sleeve mediation internal fixation bone moving system, including internal fixation steel sheet, the upper portion and the lower portion symmetry of internal fixation steel sheet is provided with a plurality of fixed holes and positioning hole, the middle part of internal fixation steel sheet is provided with slide rail, the slide rail is connected with the sliding block, the sliding block is provided with fixed hole also, the bottom of sliding block is connected titanium cable head end, titanium cable end is passed through the pulley installed in the lower part of internal fixation steel plate and is passed out internal fixation steel plate front surface in the change direction, the lower part of internal fixation steel sheet is connected with the pipe still in titanium cable exit part, titanium cable end is passed out the pipe, and the pipe end is screwed with the traction adjusting mechanism, the utility model discloses the internal fixation steel sheet is fixed on the healthy bone stem of the upper and lower ends of the bone block, then the sliding block is connected with the bone block by the fixed hole with the bone screw, then under the reversing effect of pulley, the sliding block is moved by the traction adjusting mechanism and titanium cable drive, and the bone block can be moved, so that the bone moving is completed in the body.

Description

Technical Field

[0001] This utility model belongs to the field of bone transport technology, specifically relating to a sleeve-mediated internal fixation bone transport system. Background Technology

[0002] Currently, with the rapid development of medicine and interdisciplinary fields, the Ilizarov technique (bone transport technique) is considered the "gold standard" for limb reconstruction. It is a highly effective surgical method for treating large bone defects and is hailed as one of the most significant discoveries in orthopedics. The bone transport technique has unique effects in limb lengthening, offering advantages such as minimal trauma, high efficacy, and short operation time. It is not limited by the length of the bone defect and, while lengthening the limb, can also adjust the normal alignment of the lower limb and repair soft tissues, greatly improving the patient's quality of life. Long-segment bone defects caused by general trauma, infection, and tumors can all be treated using the bone transport technique.

[0003] The bone transport process combines dynamic and static approaches. The dynamic phase involves using an external fixator for fixation and periodically rotating the nut to traction the bone, extending it by 1 mm per day for four sessions of 0.25 mm each. During this phase, the bone, surrounding soft tissues, blood vessels, and nerves are simultaneously regenerated and repaired. The static phase involves a waiting period, where bone transport begins around the 7th day post-surgery. After the transport ends meet, the osteotomy site awaits quiescent mineralization.

[0004] However, current bone transport methods all involve external fixation devices. During transport, this can easily cause secondary trauma to the patient's tissues. Furthermore, because bone transport treatment is lengthy, patients need to wear external fixators for extended periods, which is not only aesthetically pleasing but also severely restricts patient movement. Therefore, there is an urgent need for a bone transport system that can transport bone within the skin tissue to reduce secondary trauma and eliminate the need for prolonged external fixation. Utility Model Content

[0005] To address the aforementioned technical issues, this invention presents a sleeve-mediated internal fixation bone transport system that allows bone transport to be completed within the skin tissue, reducing secondary trauma to the patient and eliminating the need for prolonged external fixation, thus improving patient comfort.

[0006] This utility model discloses a sleeve-mediated internal fixation bone transport system, comprising an internal fixation plate. The internal fixation plate has several fixing holes and positioning holes symmetrically arranged at its upper and lower parts. A slide rail is provided in the middle of the internal fixation plate, and a slider is engaged on the slide rail. The slider also has fixing holes. The bottom of the slider is connected to the end of a titanium cable. The end of the titanium cable passes through the front of the internal fixation plate after changing direction around a pulley installed at the lower part of the internal fixation plate. A through-tube is also connected to the lower part of the internal fixation plate corresponding to the titanium cable exit point. The end of the titanium cable passes through the through-tube, and a positioning bolt is connected to the through-tube to tighten the titanium cable. A traction adjustment mechanism is threadedly connected to the end of the through-tube.

[0007] The tension adjustment structure includes an adjustment sleeve threaded to the end of the tube, an adjustment rod threaded inside the adjustment sleeve, both ends of the adjustment rod being open to allow the end of the titanium cable to pass through, and through holes symmetrically opened on both sides of the adjustment rod to fix the titanium cable.

[0008] The beneficial effects of this utility model are:

[0009] Compared with existing technologies, the internal fixation bone transport system of this invention fixes the internal fixation plate to the healthy bone shaft at both ends of the osteotomy block, then connects the slider to the osteotomy block with bone screws through the fixation holes, and then moves the slider by pulling the titanium cable through the traction adjustment mechanism under the action of the pulley. In this process, only the tube passes through the skin tissue, and the rest of the components are inside the skin tissue, which effectively reduces secondary damage to the patient during the transport process. The bone transport is completed in the body, eliminating the need to wear an external fixator for a long time for transport, improving both aesthetics and patient comfort. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments are briefly introduced below.

[0011] Figure 1 This is a schematic diagram of the overall structure of the bone transport system in the embodiment.

[0012] Figure 2 This is a front structural schematic diagram of the bone transport system in the embodiment.

[0013] Figure 3 This is a schematic diagram of the reverse structure of the bone transport system in the embodiment.

[0014] Figure 4 This is a side view of the bone transport system in the embodiment.

[0015] In the attached diagram, the structural names represented by each number are as follows:

[0016] 1-Internal fixing steel plate, 101-Fixing hole, 102-Positioning hole, 103-Groove, 2-Slide rail, 3-Slider, 4-Bone screw, 5-Titanium cable, 6-Pulley, 7-Mounting plate, 8-Channel, 9-Through pipe, 901-Positioning bolt, 10-Adjusting sleeve, 11-Adjusting rod, 1101-Exit hole. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Example 1

[0019] To achieve bone transport within the skin tissue, minimizing secondary trauma to the patient and eliminating the need for prolonged external brace wear, thus improving patient comfort. (See also...) Figures 1 to 4 As shown, this embodiment proposes a sleeve-mediated internal fixation bone transport system, including an internal fixation plate 1. The internal fixation plate 1 has several fixation holes 101 and positioning holes 102 symmetrically arranged on its upper and lower parts. The positioning holes 102 are used for implantation and positioning of the internal fixation plate 1 via Kirschner wires. After positioning, the fixation holes 101 are used to connect bone screws 4 implanted into the patient's healthy bone shaft. A slide rail 2 is provided in the middle of the internal fixation plate 1, and a slider 3 is engaged on the slide rail 2. The slider 3 also has fixation holes 101 for connecting to... The bone screw 4 for inserting the osteotomy block is connected to the bottom of the slider 3, and the head end of the titanium cable 5 is connected to the slider 3. The end of the titanium cable 5 passes through the channel 8 opened in the lower part of the internal fixation plate 1, and then passes through the front of the internal fixation plate 1 in a different direction around the pulley 6 installed in the lower part of the internal fixation plate 1. The shaft of the pulley 6 is installed in the slot 103 opened in the internal fixation plate 1 through the mounting plate 7. The lower part of the internal fixation plate 1 is also connected to the passage tube 9 corresponding to the part where the titanium cable 5 passes through. The end of the titanium cable 5 passes through the passage tube 9. The osteotomy block can be moved by pulling the end of the titanium cable 5.

[0020] A positioning bolt 901 is also connected to the tube 9 to clamp the titanium cable 5, so that the titanium cable 5 is fixed when not being moved. In order to improve the accuracy of moving, a tension adjustment mechanism is also threadedly connected to the end of the tube 9. The tension adjustment mechanism includes an adjustment sleeve 10 threadedly connected to the end of the tube 9. An adjustment rod 11 is threadedly connected inside the adjustment sleeve 10. The two ends of the adjustment rod 11 are open to allow the end of the titanium cable 5 to pass through. Symmetrical through holes 1101 are opened on both sides of the adjustment rod 11 to fix the titanium cable 5 for easy tensioning.

[0021] During internal fixation bone transport, the internal fixation plate 1 is inserted, and the slider 3 is connected to the osteotomy block via bone screws 4. During the dynamic transport phase, the end of the titanium cable 5 is fixed to the through hole 1101 of the adjusting rod 11. Twisting the adjusting rod 11 pulls the titanium cable 5, causing the slider 3 to move within the slide rail 2 of the plate, thereby pulling the osteotomy block to move and achieve transport. During this process, after the internal fixation plate 1 and slider 3 are connected to the healthy bone shaft and osteotomy block respectively, only the tube 9 protrudes outside the body. After the traction transport is completed, the traction adjustment mechanism can be quickly disassembled via threaded connection, thus eliminating the need for conventional external fixation and effectively reducing secondary damage to the patient during transport. Bone transport is completed within the body, eliminating the need for prolonged external fixation during transport, improving aesthetics and patient comfort.

[0022] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not describe all details exhaustively, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification.

Claims

1. A sleeve-mediated internal fixation bone transport system, comprising an internal fixation plate (1), characterized in that, The inner fixing steel plate (1) is symmetrically provided with several fixing holes (101) and positioning holes (102) on its upper and lower parts. A slide rail (2) is provided in the middle of the inner fixing steel plate (1). A slider (3) is snapped onto the slide rail (2). The slider (3) is also provided with fixing holes (101). The bottom of the slider (3) is connected to the head end of the titanium cable (5). The end of the titanium cable (5) passes through the front of the inner fixing steel plate (1) by changing direction around the pulley (6) installed at the lower part of the inner fixing steel plate (1). The lower part of the inner fixing steel plate (1) is also connected to the part where the titanium cable (5) passes through. A tube (9) is provided, through which the end of the titanium cable (5) passes. A positioning bolt (901) is connected to the tube (9) to press the titanium cable (5). A tension adjustment mechanism is threadedly connected to the end of the tube (9). The tension adjustment mechanism includes an adjustment sleeve (10) threadedly connected to the end of the tube (9). An adjustment rod (11) is threadedly connected inside the adjustment sleeve (10). The two ends of the adjustment rod (11) are open to allow the end of the titanium cable (5) to pass through. A through hole (1101) is symmetrically opened on both sides of the adjustment rod (11) to fix the titanium cable (5).

Images