Backbone focus windowing tool set

Abstract

The invention relates to the technical field of medical instruments, in particular to a backbone lesion windowing tool set which is easy and convenient to operate, capable of rapidly manufacturing a bone window on a long bone backbone and reducing the occurrence rate of pathological fracture in the bone window manufacturing process and after the operation, regular in window shape, smooth and non-sunken in cross section, capable of reducing the window area to the maximum extent and capable of improving the production efficiency. Postoperative recovery is facilitated; comprising a trephine and a swing saw, the trephine, the swing saw and the guide plate assembly jointly form a windowing tool set, the positioning needle core is located on one side of sawteeth of a trephine pipe and fixed in the trephine pipe of the trephine through a fixing piece, and the tip end of the positioning needle core extends outwards from the inside of the trephine pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and more particularly to a tool kit for opening a window for a backbone lesion. Background Art

[0002] As we all know, limb shaft tumors, such as benign bone tumors and metastatic tumors, as well as other lesions such as osteomyelitis, often require curettage and bone grafting or bone cement filling. During this surgery, shaft fenestration is essential. The fenestration is often designed to be elliptical, minimizing the risk of pathological fractures due to stress concentration.

[0003] The most commonly used fenestration method in clinical practice involves drilling along the fenestration area with a 1.5 or 2.0 mm diameter Kirschner wire. Osteotomy is then performed with an Emei chisel at the elliptical ends, and the central portion is opened with a bone knife or an oscillating saw. This method is time-consuming and labor-intensive, and can easily cause pathological fractures during surgery. The resulting bone window is also irregular in shape, easily creating irregular gaps and potentially leading to fractures due to stress concentration after surgery. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In view of the above-mentioned deficiencies of the prior art, the present invention provides a bone lesion window opening tool kit, the purpose of which is to: be easy to operate, be able to quickly prepare bone windows on the long bone shaft and reduce the incidence of pathological fractures during and after the bone window preparation process.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a tool kit for fenestration of a diaphyseal lesion, comprising a ring saw and an oscillating saw; characterized in that it also comprises a guide plate assembly and a positioning needle core, wherein the ring saw, the oscillating saw and the guide plate assembly together constitute a set of fenestration tool kits, the positioning needle core being located on one side of the saw teeth of the ring saw tube, the positioning needle core being fixed in the saw tube of the ring saw by a fixing plate, and the tip of the positioning needle core protruding outward from the inside of the saw tube;

[0008] The top end and bottom end of the movable frame are provided with a positioning rod, and the positioning rod has a limit switch, and the limit switch is fixed with a positioning rod on the right end side of the movable frame, and the limit switch is located in the limit slot and is slidably connected to the limit slot.

[0009] As a preferred solution of the present invention, it is characterized in that the two groups of positioning posts are symmetrically arranged and have the same size, and the bottom ends of the two groups of positioning posts are both provided with positioning spires.

[0010] As a preferred solution of the present invention, it is characterized in that the four groups of guide grooves correspond to each other to form two groups of communicating guide holes, the maximum distance between the two groups of guide holes is the same as the diameter of the positioning columns, the front and rear ends of the two groups of positioning columns are respectively flat, and the spacing between the front and rear ends corresponds to the minimum distance between the two groups of guide holes.

[0011] As a preferred solution of the present invention, it is characterized in that the outer diameter of the saw tube of the ring saw varies gradually according to the diameter of the bone window designed for surgery, ranging from 5 to 16 mm, with 1 mm as the unit of variation. The diameter of the positioning needle core is 1.6 mm, and the needle tip is made consistent with the Kirschner needle tip commonly used in clinical practice, and has the characteristics of being sharp and easy to drill into bone.

[0012] As a preferred solution of the present invention, it is characterized in that the groove spacing of the guide groove is 1.2 mm, which is slightly larger than the thickness of the oscillating saw blade.

[0013] (3) Beneficial effects

[0014] Compared with the prior art, the present invention provides a tool kit for windowing bone lesions, which has the following beneficial effects: windowing is performed on the long bone shaft by a ring saw, and when the saw tube rotates at high speed, the positioning needle core in the saw tube also rotates at high speed, and the positioning needle core first contacts the surface of the bone shaft, and the high-speed rotating positioning needle core can be quickly and accurately screwed into the bone shaft, and then the saw teeth on the saw tube contact the bone shaft. Since the surface of the bone shaft is arc-shaped and irregular, the positioning needle core can prevent the saw teeth from offsetting and sliding when windowing the bone shaft surface, and finally, two regular circular bone windows of the same size are formed. After the two circular bone windows are made, the guide plate assembly is placed on the bone shaft, and the outer diameters of the two groups of positioning posts are consistent with the diameters of the circular bone windows. The two groups of positioning posts are respectively extended into the two groups of circular bone windows, and through the four The sliding plate and the four sets of sliding grooves are slidably matched, and the distance between the two sets of positioning columns can be telescopically adjusted according to the distance of the circular bone windows. The movable guide plate can be limited by the positioning column and the limit column to prevent the movable guide plate from being completely separated from the fixed guide plate. When the guide plate assembly is adjusted to a good length and fixed to the two circular bone windows, an oscillating saw is used to perform osteotomy on the bone shaft. The four sets of guide grooves correspond to each other in pairs, providing a guide path for the oscillating saw blade. The saw blade moves in the guide groove to perform osteotomy on the bone shaft. The spacing of the guide grooves is consistent with the inner diameter of the circular bone window. After osteotomy, an elliptical bone window is obtained from the two circular bone windows. The window shape is regular, the cross-section is smooth and has no depression, and the window area is minimized to maximize the reduction of the window area, which is conducive to postoperative recovery. The operation is simple, and the bone window can be quickly prepared on the long bone shaft and the incidence of pathological fractures during and after the bone window production process is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the tool set of the present invention;

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of the fixed guide plate of the present invention;

[0017] Figure 3 It is a schematic diagram of the three-dimensional structure of the movable guide plate of the present invention;

[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of the guide plate assembly of the present invention in a closed state;

[0019] Figure 5 It is a schematic diagram of the three-dimensional structure of the guide plate assembly of the present invention in the pulled-out state;

[0020] Figure 6 It is a schematic diagram of the three-dimensional structure of the ring saw of the present invention;

[0021] Figure 7 This invention Figure 6 Schematic diagram of the local structure at A in the middle;

[0022] Figure 8It is a structural schematic diagram of the saw tube portion of the ring saw of the present invention;

[0023] Figure 9 It is a schematic diagram of the three-dimensional structure of the oscillating saw of the present invention;

[0024] Markings in the accompanying drawings: 1. Ring saw; 2. Oscillating saw; 3. Guide plate assembly; 4. Positioning needle core; 5. Saw tube; 6. Saw teeth; 7. Fixed plate; 8. Fixed guide plate; 9. Movable guide plate; 10. Positioning column; 11. Guide groove; 12. Sliding plate; 13. Positioning rod; 14. Limit rod; 15. Sliding groove; 16. Positioning circular groove; 17. Spire. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1-9 The present invention provides a technical solution: a tool kit for opening a window of a diaphyseal lesion, comprising a ring saw 1 and an oscillating saw 2; characterized in that it also comprises a guide plate assembly 3 and a positioning needle core 4, wherein the ring saw 1, the oscillating saw 2 and the guide plate assembly 3 together constitute a set of window opening tool kits, wherein the positioning needle core 4 is located on one side of the saw teeth 6 of the saw tube 5 of the ring saw 1, the positioning needle core 4 is fixed in the saw tube 5 of the ring saw 1 by a fixing plate 7, and the tip of the positioning needle core 4 protrudes outward from the saw tube 5;

[0027] The guide plate assembly 3 includes a fixed guide plate 8 and a movable guide plate 9. The fixed guide plate 8 and the movable guide plate 9 are of the same size and are symmetrically arranged. A positioning column 10 is provided at the bottom end of the fixed guide plate 8 and the movable guide plate 9. A guide groove 11 is respectively opened on the front and rear sides of the right end of the fixed guide plate 8. The same guide groove 11 is opened on the front and rear sides of the left end of the movable guide plate 9. The four groups of guide grooves 11 are connected in pairs. Two groups of sliding plates 12 are respectively provided on the front and rear sides of the right end of the fixed guide plate 8. The four groups of sliding plates 12 are respectively connected in pairs with the two groups of guide grooves 11. The fixed guide plate 8 is on the right A positioning rod 13 is provided in the middle of the end, and a limiting rod 14 is fixedly provided on the side of the positioning rod 13 away from the fixed guide plate 8. The left end of the movable guide plate 9 is respectively provided with corresponding sliding grooves 15 corresponding to the four groups of sliding plates 12. The four groups of sliding plates 12 can slide into the four groups of sliding grooves 15 respectively. A positioning circular groove 16 is provided in the middle of the left end of the movable guide plate 9 corresponding to the positioning rod 13. The top and bottom ends of the positioning circular groove 16 are provided with limiting grooves. The positioning rod 13 slides into the left end of the positioning circular groove 16, and the limiting rod 14 is located in the limiting groove and the limiting groove is slidably connected.

[0028] As a specific solution of the present invention, the two groups of positioning columns 10 are symmetrically arranged and have the same size. The bottom ends of the two groups of positioning columns 10 are provided with positioning spires 17. The two groups of spires can more smoothly extend from the top of the two groups of circular bone windows for positioning, thereby improving practicality.

[0029] As a specific solution of the present invention, the four groups of guide grooves 11 correspond to each other in pairs to form two groups of communicating guide through holes. The maximum distance between the two groups of guide through holes is the same as the diameter of the positioning column 10. The front and rear ends of the two groups of positioning columns 10 are respectively flat, and the spacing between the front and rear ends corresponds to the minimum distance between the two groups of guide through holes. This design can ensure that the oscillating saw can completely cut off the bone when cutting the bone shaft, and cut the two groups of circular bone windows into an elliptical bone window, thereby avoiding the phenomenon of incomplete bone cutting.

[0030] As a specific solution of the present invention, the outer diameter of the saw tube 5 of the ring saw 1 varies gradually according to the diameter of the bone window designed for surgery, ranging from 5 to 16 mm, with 1 mm as the unit of variation. The diameter of the positioning needle core 4 is 1.6 mm, and the needle tip is made consistent with the Kirschner needle tip commonly used in clinical practice, and has the characteristics of being sharp and easy to drill into bone.

[0031] As a specific solution of the present invention, the groove spacing of the guide groove 11 is 1.2mm, which is slightly larger than the thickness of the saw blade of the oscillating saw 2. The thickness of the saw blade in the oscillating saw is usually 1mm. The guide groove spacing is set to 1.2mm to facilitate the oscillating saw to move within the guide groove.

[0032] When the present invention is in use, a window is opened on the long bone shaft by a ring saw 1. When the saw tube 5 rotates at high speed, the positioning needle core 4 in the saw tube 5 also rotates at high speed. The positioning needle core 4 first contacts the surface of the shaft, and the high-speed rotating positioning needle core 4 can be quickly and accurately screwed into the shaft. Then the saw teeth 6 on the saw tube 5 contact the shaft. Since the surface of the shaft is arc-shaped and irregular, the positioning effect of the positioning needle core 4 can prevent the saw teeth 6 from offsetting and sliding when opening a hole on the shaft surface. Finally, two regular circular bone windows of the same size are formed. After the two circular bone windows are made, the guide plate assembly 3 is placed on the shaft. The outer diameters of the two groups of positioning posts 10 are consistent with the diameters of the circular bone windows. The two groups of positioning posts 10 are respectively extended into the two groups of circular bone windows, and the four groups of sliding plates 12 and the four groups of sliding grooves 15 are slid. With the cooperation, the distance between the two groups of positioning columns 10 can be telescopically adjusted according to the distance of the circular bone windows. The positioning columns 10 and the limiting columns can limit the movable guide plate 9 to prevent the movable guide plate 9 from being completely separated from the fixed guide plate 8. After the guide plate assembly 3 is adjusted to a good length and fixed to the two circular bone windows, the oscillating saw 2 is used to perform osteotomy on the bone shaft. The four groups of guide grooves 11 correspond to each other in pairs, providing a guide path for the saw blade of the oscillating saw 2. The saw blade moves in the guide groove 11 to perform osteotomy on the bone shaft. The spacing of the guide grooves 11 is consistent with the inner diameter of the circular bone window. After osteotomy, an elliptical bone window is obtained from the two circular bone windows. The window shape is regular, the cross-section is smooth and has no depressions, and the window area is minimized to maximize the reduction of the window area, which is conducive to postoperative recovery. The operation is simple, and the bone window can be quickly prepared on the long bone shaft and the incidence of pathological fractures during and after the bone window production process is reduced.

[0033] The electrical components mentioned in this article are all connected to an external main controller and 220V AC power, and the main controller can be a conventional known device that performs control such as a computer.

[0034] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0035] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A tool kit for opening a window of a diaphyseal lesion, comprising a ring saw (1) and an oscillating saw (2); characterized in that: The invention also comprises a guide plate assembly (3) and a positioning needle core (4), wherein the ring saw (1), the swing saw (2) and the guide plate assembly (3) together form a window opening tool set, wherein the positioning needle core (4) is located on one side of the saw teeth (6) of the saw tube (5) of the ring saw (1), and the positioning needle core (4) is fixed in the saw tube (5) of the ring saw (1) through a fixing plate (7), and the tip of the positioning needle core (4) protrudes outward from the inside of the saw tube (5); The guide plate assembly (3) includes a fixed guide plate (8) and a movable guide plate (9), the fixed guide plate (8) and the movable guide plate (9) are of the same size and are symmetrically arranged, and a positioning column (10) is provided at the bottom end of each of the fixed guide plate (8) and the movable guide plate (9), and a guide groove (11) is provided on the front and rear sides of the right end of the fixed guide plate (8), and the same guide groove (11) is provided on the front and rear sides of the left end of the movable guide plate (9), and the four groups of guide grooves (11) are communicated with each other in pairs, and two groups of sliding plates (12) are provided on the front and rear sides of the right end of the fixed guide plate (8), and the four groups of sliding plates (12) are communicated with the two groups of guide grooves (11) in pairs, respectively. ) is provided with a positioning rod (13) in the middle of the right end, and a limiting rod (14) is fixedly provided on the side of the positioning rod (13) away from the fixed guide plate (8). The left end of the movable guide plate (9) is respectively provided with corresponding sliding grooves (15) corresponding to the four groups of sliding plates (12). The four groups of sliding plates (12) can slide into the four groups of sliding grooves (15) respectively. A positioning circular groove (16) is provided in the middle of the left end of the movable guide plate (9) corresponding to the positioning rod (13). The top and bottom ends of the positioning circular groove (16) are provided with limiting grooves. The positioning rod (13) slides into the left end of the positioning circular groove (16). The limiting rod (14) is located in the limiting groove and is slidably connected to the limiting groove.

2. A tool kit for opening a diaphyseal lesion according to claim 1, characterized in that: The two groups of positioning posts (10) are symmetrically arranged and have the same size. The bottom ends of the two groups of positioning posts (10) are both provided with positioning spires (17).

3. A tool kit for opening a diaphyseal lesion according to claim 2, characterized in that: The four groups of guide grooves (11) correspond to each other to form two groups of communicating guide through holes, the maximum distance between the two groups of guide through holes is the same as the diameter of the positioning column (10), the front and rear ends of the two groups of positioning columns (10) are respectively flat, and the distance between the front and rear ends corresponds to the minimum distance between the two groups of guide through holes.

4. A tool kit for opening a diaphyseal lesion according to claim 3, characterized in that: The outer diameter of the saw tube (5) of the ring saw (1) varies gradually according to the diameter of the bone window designed for surgery, ranging from 5 to 16 mm, with 1 mm as the unit of variation. The diameter of the positioning needle core (4) is 1.6 mm, and the needle tip is made consistent with the Kirschner needle tip commonly used in clinical practice, and has the characteristics of being sharp and easy to drill into the bone.

5. A tool kit for opening a diaphyseal lesion according to claim 4, characterized in that: The groove spacing of the guide groove (11) is 1.2 mm, which is slightly larger than the thickness of the saw blade of the oscillating saw (2).

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