Laser calibration tool applied to measurement and calibration of knee joint bone tumor osteotomy curved surface

Abstract

The invention relates to a laser calibration tool applied to measurement and calibration of a knee joint bone tumor osteotomy curved surface. The laser calibration tool comprises a far-end positioning piece, a measurement seat and a bone segment positioning piece. The far-end positioning piece is provided with a first positioning surface which is used for being in contact with the far end of the bone for positioning. The measuring seat is provided with a first calibration plate, the first calibration plate is flush with the first positioning surface, the measuring seat is in sliding connection with the far-end positioning piece, and the first calibration plate is provided with a laser range finder. The bone segment positioning piece comprises a positioning block and a second calibration plate, the positioning block is provided with a second positioning face used for making contact with the outer edge of the bone segment, the second calibration plate is perpendicular to the second positioning face, and the second calibration plate is in sliding connection with the positioning block. Through the structural arrangement of the measuring base and the bone section positioning piece, the measuring operation of the measuring base and the bone section positioning piece can have high use flexibility, medical staff can be assisted in measuring the length of the curved surface of the tumor surface, and the measuring device has the advantage of being high in measuring efficiency.

Description

Technical Field

[0001] The invention relates to a medical auxiliary device, in particular to a laser calibration tool used for measuring and calibrating the osteotomy curved surface of a knee joint bone tumor. Background Art

[0002] In knee surgery, especially those involving tumor resection and osteotomy reconstruction, measuring the length of the tumor surface is crucial to determine the osteotomy position and ensure the effectiveness of the surgery. Due to the unique heteromorphic characteristics of bone tumors, they have the nature of expansive growth. Traditional methods often rely on the doctor's experience and visual inspection, which has large errors and uncertainties. Therefore, a laser calibration tool that can accurately measure and calibrate the osteotomy position is needed to improve the accuracy and success rate of the surgery. Summary of the invention

[0003] In response to the above technical problems, the present invention provides a laser calibration tool for measuring and calibrating the osteotomy surface of a knee bone tumor, which can assist medical personnel in measuring the length of the tumor surface and has the advantage of high measurement efficiency.

[0004] To achieve the above object, the present invention adopts the following technical solutions: A laser calibration tool for measuring and calibrating the osteotomy surface of a knee bone tumor, comprising: A distal positioning member, wherein the distal positioning member has a first positioning surface, and the first positioning surface is used to contact the distal end of the bone for positioning; a measuring seat, wherein a first calibration plate is disposed on the measuring seat, the first calibration plate is flush with the first positioning surface, the measuring seat is slidably connected to the distal positioning member, and the sliding direction is parallel to the first positioning surface, and a laser rangefinder is disposed on the first calibration plate; and A bone segment positioning piece, the bone segment positioning piece comprises a positioning block and a second calibration plate, the positioning block has a second positioning surface for contacting the outer edge of the bone segment, the second calibration plate is perpendicular to the second positioning surface, and the second calibration plate is slidably connected to the positioning block along a direction parallel to the second positioning surface.

[0005] In one embodiment, the measuring seat includes a positioning box body, the positioning box body is used for the distal end of the bone to sink into and position, and the bottom of the positioning box body forms the first positioning surface.

[0006] In one embodiment, the positioning block is U-shaped to form an escape zone for the bone segment to sink into and position. The positioning block is also provided with a locking assembly, which presses the bone segment against the second positioning surface.

[0007] In one embodiment, the positioning block is provided with a column and a stud, and the column and the stud are respectively arranged on both sides of the avoidance area; The locking assembly comprises a clamping plate, on which a positioning hole slidably connected to the column and a limiting hole for the stud to penetrate are formed, and a locking bolt is threadedly connected to the end of the stud.

[0008] In one embodiment, a slide bar is fixedly provided on the second calibration plate, a mounting hole is correspondingly provided on the positioning block, and the slide bar is slidably connected to the mounting hole.

[0009] In one embodiment, the mounting hole is coaxially arranged with the column or the stud.

[0010] In one embodiment, the slide bar and the mounting hole are arranged in a transition fit.

[0011] In one embodiment, a positioning groove is provided on the positioning block, wherein the blade is sunk into the positioning groove for positioning, and the positioning groove corresponds to the second calibration plate.

[0012] In one embodiment, a reflector is disposed on the second calibration plate.

[0013] In one embodiment, one side of the positioning block is a third positioning surface that is flush with the second calibration plate. The third positioning surface is parallel to the second calibration plate.

[0014] The present invention adopts the above technical solution, which has the following advantages: After completing the measurement and calibration of the laser calibration tool, when using this laser calibration tool for measurement and calibration, the medical staff places the distal positioning piece at the distal end of the bone after completing the stripping of the bone segment, and moves the distal positioning piece as a whole so that the first positioning surface of the distal positioning piece contacts the distal end of the bone. At this time, the positioning of the distal positioning piece is completed.

[0015] After completing the positioning of the distal positioning piece, refer to the pre-determined osteotomy distance value and observe the reading of the laser rangefinder, gradually move the bone segment positioning piece, make the second positioning surface contact the outer edge of the bone segment, and continue to move the bone segment positioning piece until the reading of the laser rangefinder reaches the preset value. At this time, the curved surface measurement calibration of the bone tumor osteotomy is completed. During the measurement and calibration process, if the patient's bone tumor volume is large and interferes with the measurement of the laser rangefinder, the laser rangefinder on the first calibration plate is moved out of the influence range of the bone tumor volume by moving the measuring seat. Similarly, by adjusting the position of the second calibration plate to correspond to the laser emitted from the laser rangefinder, the structural setting of the measuring seat and the bone segment positioning piece enables the measurement operation of the measuring seat and the bone segment positioning piece to have high flexibility of use, can assist medical staff in measuring the curved surface length of the tumor surface, and has the advantage of high measurement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the specific structure of a laser calibration tool in one embodiment of the present invention; Figure 2 This is a schematic diagram of the front structure of a laser calibration tool in one embodiment of the present invention; Figure 3 A distal positioning member and a measuring seat in one embodiment of the present invention; Figure 4 A schematic diagram of the specific structure of a locking assembly in one embodiment of the present invention; Reference numerals: 1. distal positioning member; 11. first positioning surface; 2. Measuring seat; 21. First calibration plate; 22. Laser rangefinder; 3. Bone segment positioning member; 31. Positioning block; 311. Avoidance area; 312. Positioning groove; 313. Mounting hole; 314. Third positioning surface; 32. second calibration plate; 321. slide bar; 33. Second positioning surface; 34, locking assembly; 341, column; 342, stud; 343, clamping piece; 344, positioning hole; 345, limiting hole; 346, locking bolt; 35. Reflector. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention is described clearly and completely below. Obviously, the described embodiments are 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 persons in the art without creative work are within the scope of protection of the present invention.

[0018] Unless otherwise defined, the technical or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second", "third", "fourth" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0019] In knee surgery, especially surgery involving tumor resection and osteotomy reconstruction, measuring the length of the tumor surface curve is crucial to determine the osteotomy position and ensure the effectiveness of the surgery. Due to the unique heteromorphic characteristics of bone tumors, they have the property of expansive growth. Traditional methods often rely on the doctor's experience and visual inspection, and there are large errors and uncertainties. In response to the above technical problems, the present invention provides a laser calibration tool for measuring and calibrating the osteotomy surface of knee bone tumors, which can assist medical staff in measuring the length of the tumor surface curve and has the advantage of high measurement efficiency. The technical solution of the present invention is described in detail below in conjunction with specific examples.

[0020] Reference Figure 1 as well as Figure 2 As shown, the laser calibration tool used for measuring and calibrating the osteotomy surface of a knee bone tumor according to the present invention comprises a distal positioning member 1, a measuring seat 2 and a bone segment positioning member 3.

[0021] The distal positioning member 1 has a first positioning surface 11, which is used to contact the distal end of the bone for positioning. The measuring seat 2 is provided with a first calibration plate 21, which is flush with the first positioning surface 11. The measuring seat 2 is slidably connected to the distal positioning member 1, and the sliding direction is parallel to the first positioning surface 11. The first calibration plate 21 is provided with a laser rangefinder 22.

[0022] The bone segment positioning member 3 includes a positioning block 31 and a second calibration plate 32. The positioning block 31 has a second positioning surface 33 for contacting the outer edge of the bone segment. The second calibration plate 32 is perpendicular to the second positioning surface 33, and the second calibration plate 32 is slidably connected to the positioning block 31 along a direction parallel to the second positioning surface 33.

[0023] It should be noted that, in this embodiment, the laser calibration tool is mainly used for the measurement and calibration of the osteotomy surface of the knee bone tumor. Before the operation, the medical staff will first determine the osteotomy position based on the test results, and calculate the osteotomy distance value between the osteotomy position and the distal end of the bone. During the operation, the distal end of the bone is located, and the laser rangefinder 22 is used to locate the osteotomy position according to the pre-obtained osteotomy distance value, thereby completing the measurement and calibration of the osteotomy surface of the bone tumor. It should be noted that the laser rangefinder 22 is installed and fixed on the first calibration plate 21. In the initial stage, measurement and calibration need to be completed between the laser rangefinder 22 and the first calibration plate 21. During calibration, the calibration object is placed above the remote positioning member 1, and then the laser rangefinder 22 measures the distance of the calibration object to obtain a first calibration value. Then, another measuring device is used to measure the distance between the calibration object and the first calibration plate 21 to obtain a second calibration value. At this time, the difference between the first calibration value and the second calibration value is the position deviation value of the laser rangefinder 22 and the first calibration plate 21. In subsequent measurements, the measurement value of the laser rangefinder 22 needs to be subtracted from the position deviation value obtained by calibration to obtain the final distance value.

[0024] Illustratively, after completing the measurement and calibration of the laser calibration tool, when using the laser calibration tool for measurement and calibration, the medical staff places the distal positioning piece 1 at the distal end of the bone after completing the stripping of the bone segment, and moves the distal positioning piece 1 as a whole so that the first positioning surface 11 of the distal positioning piece 1 contacts the distal end of the bone, and the positioning of the distal positioning piece 1 is completed.

[0025] After completing the positioning of the distal positioning member 1, the bone segment positioning member 3 is gradually moved by observing the reading of the laser rangefinder 22 with reference to the preset osteotomy distance value, so that the second positioning surface 33 contacts the outer edge of the bone segment, and the bone segment positioning member 3 is continued to be moved until the reading of the laser rangefinder 22 reaches the preset value. At this time, the curved surface measurement calibration of the bone tumor osteotomy is completed. During the measurement and calibration process, if the patient's bone tumor volume is large and interferes with the measurement of the laser rangefinder 22, the laser rangefinder 22 on the first calibration plate 21 is moved out of the influence range of the bone tumor volume by moving the measuring seat 2. Similarly, by adjusting the position of the second calibration plate 32 to correspond to the laser emitted from the laser rangefinder 22, the structural setting of the measuring seat 2 and the bone segment positioning member 3 enables the measurement operation of the measuring seat 2 and the bone segment positioning member 3 to have high flexibility of use, can assist medical staff in measuring the curved surface length of the tumor surface, and has the advantage of high measurement efficiency.

[0026] It should be noted that, in this embodiment, the laser rangefinder 22 specifically uses the KEYENCE laser sensor LR-X series, specifically a micro laser sensor, and the specific size is 9.4×27×17 mm.

[0027] In one embodiment, the overall structure of the measuring seat 2 is further refined. The measuring seat 2 includes a positioning box body, in which the distal end of the bone is sunk for positioning, and the bottom of the positioning box body forms a first positioning surface 11.

[0028] It should be noted that during the positioning process, medical staff can place the entire distal end of the bone into the positioning box, and the box-shaped structure of the positioning box can limit the detachment of the distal end of the bone. During the measurement process, medical staff only need to pay attention to moving the corresponding positions of the first calibration plate 21 and the second calibration plate 32, so that the light beam of the laser rangefinder 22 can be relatively vertical during the measurement process. There is no need to pay attention to whether the distal end of the bone will accidentally detach from the positioning box. Medical staff only need to keep the first positioning surface 11 in contact with the distal end of the bone. The sleeve-type setting can improve the convenience of operation for medical staff.

[0029] In one embodiment, the overall structure of the positioning block 31 is further refined. The positioning block 31 is U-shaped to form an avoidance area 311 for the bone segment to sink into and position. A locking assembly 34 is also provided on the positioning block 31 to press the bone segment against the second positioning surface 33.

[0030] The setting of the locking component 34 can facilitate medical personnel to fix the positioning block 31 as a whole. After completing the measurement and calibration positioning, the positioning block 31 can be fixed to the bone segment as a whole by operating the locking component 34, and the measuring seat 2 and the distal positioning member 1 are no longer needed. Therefore, in the subsequent operation process, medical personnel can perform surgical operations according to the specific position of the positioning block 31.

[0031] Specifically, a column 341 and a stud 342 are provided on the positioning block 31, and the column 341 and the stud 342 are respectively provided on both sides of the avoidance area 311. In this embodiment, the overall structure of the locking assembly 34 is further refined, and the locking assembly 34 includes a clamping piece 343, and the clamping piece 343 is provided with a positioning hole 344 slidably connected to the column 341, and a limiting hole 345 for the stud 342 to penetrate, and the end of the stud 342 is threadedly connected with a locking bolt 346.

[0032] Illustratively, after the overall positioning of the bone segment positioning piece 3 is completed, the clamping piece 343 is inserted into the column 341 and the stud 342 through the positioning hole 344 and the limiting hole 345, and then the locking bolt 346 is screwed in until the locking bolt 346 presses the clamping piece 343 tightly against the bone segment, thereby completing the fixation of the bone segment positioning piece 3. In the subsequent operation process, medical staff can perform surgical operations according to the specific position of the positioning block 31.

[0033] In this embodiment, the sliding connection structure of the second calibration plate 32 is further refined. A sliding rod 321 is fixedly provided on the second calibration plate 32, and a mounting hole 313 is correspondingly provided on the positioning block 31. The sliding rod 321 is slidably connected to the mounting hole 313.

[0034] Specifically, the mounting hole 313 is coaxially arranged with the column 341 or the stud 342 .

[0035] It should be noted that, in this embodiment, there are two mounting holes 313 and two slide bars 321, so mounting holes 313 are provided on both the main body and the stud 342. The coaxial arrangement enables the mounting holes 313 to be installed in a hidden manner, and the mounting structure of the second calibration plate 32 can be set in a hidden manner, avoiding too many and too complicated connection structures, improving the operability of medical staff, and avoiding the occurrence of structural interference.

[0036] More preferably, in this embodiment, the slide bar 321 and the mounting hole 313 are set in transitional fit. The setting of transitional fit can provide a damping effect between the slide bar 321 and the mounting hole 313, and during the adjustment process of the second calibration plate 32, the second calibration plate 32 can play a positioning role, so that medical staff can move and adjust.

[0037] In one embodiment, a positioning groove 312 is provided on the positioning block 31 , and the blade is positioned in the positioning groove 312 . The positioning groove 312 corresponds to the second calibration plate 32 .

[0038] In this embodiment, the positioning groove 312 is used to position the blade. After completing the positioning and fixation of the bone segment positioning member 3, the medical staff can completely get rid of the manual grip of the laser calibration tool. Because the positioning groove 312 corresponds to the second calibration plate 32, the cutting device can be directly controlled to pre-cut the bone segment. After the initial cutting, the laser calibration tool can be completely removed for subsequent cutting operations. The setting of the positioning groove 312 enables the bone segment positioning member 3 to not only have the effect of positioning and fixing, but also provide for the positioning of the blade, thereby further optimizing the convenience of operation for medical staff.

[0039] In one embodiment, more preferably, one side of the positioning block 31 is a flush third positioning surface 314 , and the third positioning surface 314 is parallel to the second calibration plate 32 .

[0040] Optionally, if the medical staff does not need to use the positioning groove 312 to position the blade for pre-cutting, by pre-measuring the distance difference between the third positioning surface 314 and the second calibration plate 32, the third positioning surface 314 is used for positioning during the positioning process. During subsequent cutting, the medical staff can directly rely on the third positioning surface 314 for positioning and cutting.

[0041] In one embodiment, it is more preferred that a reflective mirror 35 is disposed on the second calibration plate.

[0042] It should be noted that, because the bone is a curved surface, during the calibration measurement process, if the second calibration plate is tilted with the first calibration plate, it will cause measurement errors. The setting of the reflector 35 allows the operator to manipulate the bone segment positioning member during the measurement and calibration process so that the light beam reflected by the reflector 35 can overlap with the emitted light beam, thereby avoiding the occurrence of measurement errors. After the bone segment positioning member moves to the corresponding position, the reading of the laser rangefinder 22 corresponds to the preset value. In addition, in order to avoid the direct measurement of the reflector 35 causing errors in the measurement of the laser rangefinder 22, after the bone segment positioning member moves to the corresponding position, the second calibration plate can be appropriately slid to separate the reflector 35 from the light beam, and the measurement reading can be performed again until the reading corresponds to the preset value. Specific implementation method: In the initial stage, the laser rangefinder 22 and the first calibration plate 21 need to complete measurement and calibration. During calibration, the calibration object is placed above the remote positioning member 1, and then the laser rangefinder 22 measures the distance of the calibration object to obtain a first calibration value. Then, another measuring device is used to measure the distance between the calibration object and the first calibration plate 21 to obtain a second calibration value. At this time, the difference between the first calibration value and the second calibration value is the position deviation value of the laser rangefinder 22 and the first calibration plate 21. In subsequent measurements, the position deviation value obtained by calibration needs to be subtracted from the measurement value of the laser rangefinder 22 to obtain the final distance value. After completing the measurement and calibration of the laser calibration tool, the laser calibration tool is used for measurement and calibration. After completing the stripping of the bone segment, the medical staff places the distal positioning member 1 at the distal end of the bone. The medical staff can put the entire distal end of the bone into the positioning box body, and the box-shaped structure of the positioning box body can limit the detachment of the distal end of the bone. During the measurement process, the medical staff only needs to pay attention to moving the corresponding positions of the first calibration plate 21 and the second calibration plate 32, so that the laser rangefinder 22 can be in a relatively vertical state during the measurement process; After the positioning of the distal positioning member 1 is completed, the bone segment positioning member 3 is gradually moved by observing the reading of the laser rangefinder 22 with reference to the pre-set osteotomy distance value, so that the second positioning surface 33 contacts the outer edge of the bone segment, and the bone segment positioning member 3 is continued to be moved until the reading of the laser rangefinder 22 reaches the preset value. At this time, the curved surface measurement calibration of the bone tumor osteotomy is completed. During the measurement and calibration process, if the patient's bone tumor volume is large and interferes with the measurement of the laser rangefinder 22, the laser rangefinder 22 on the first calibration plate 21 is moved out of the influence range of the bone tumor volume by moving the measuring seat 2. Similarly, the position of the second calibration plate 32 is adjusted to correspond to the laser emitted from the laser rangefinder 22; After the measurement and calibration are completed, the clamping piece 343 is inserted into the column 341 and the stud 342 through the positioning hole 344 and the limiting hole 345, and then the locking bolt 346 is screwed in until the locking bolt 346 presses the clamping piece 343 tightly against the bone segment, thereby completing the fixation of the bone segment positioning member 3. In the subsequent operation process, the medical staff can perform the surgical operation according to the specific position of the positioning block 31; After completing the fixation of the bone segment positioning piece 3, the medical staff can completely stop manually holding the laser calibration tool. Since the positioning groove 312 corresponds to the second calibration plate 32, the cutting device can be directly controlled to pre-cut the bone segment. After the initial cutting, the laser calibration tool can be completely removed for subsequent cutting operations. The setting of the positioning groove 312 enables the bone segment positioning piece 3 to not only have the effect of positioning and fixing, but also provide for the blade to be positioned, thereby further optimizing the convenience of operation for medical staff.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A laser calibration tool for measuring and calibrating the osteotomy surface of a knee bone tumor, characterized in that: include: A distal positioning member, wherein the distal positioning member has a first positioning surface, and the first positioning surface is used to contact the distal end of the bone for positioning; a measuring seat, wherein a first calibration plate is disposed on the measuring seat, the first calibration plate is flush with the first positioning surface, the measuring seat is slidably connected to the distal positioning member, and the sliding direction is parallel to the first positioning surface, and a laser rangefinder is disposed on the first calibration plate; and A bone segment positioning piece, the bone segment positioning piece comprises a positioning block and a second calibration plate, the positioning block has a second positioning surface for contacting the outer edge of the bone segment, the second calibration plate is perpendicular to the second positioning surface, and the second calibration plate is slidably connected to the positioning block along a direction parallel to the second positioning surface.

2. The laser calibration tool according to claim 1, characterized in that: The measuring seat comprises a positioning box body, wherein the distal end of the bone is sunk into the positioning box body for positioning, and the bottom of the positioning box body forms the first positioning surface.

3. The laser calibration tool according to claim 1, characterized in that: The positioning block is arranged in a U shape to form an escape zone for the bone segment to sink into and position. A locking assembly is also arranged on the positioning block to press the bone segment against the second positioning surface.

4. The laser calibration tool according to claim 3, characterized in that: The positioning block is provided with a column and a stud, and the column and the stud are respectively arranged on both sides of the avoidance area; The locking assembly comprises a clamping plate, on which a positioning hole slidably connected to the column and a limiting hole for the stud to penetrate are formed, and a locking bolt is threadedly connected to the end of the stud.

5. The laser marking tool according to claim 4, characterized in that: A sliding rod is fixedly arranged on the second calibration plate, and a mounting hole is correspondingly arranged on the positioning block, and the sliding rod is slidably connected to the mounting hole.

6. The laser marking tool according to claim 5, characterized in that: The mounting hole is coaxially arranged with the column or the stud.

7. The laser marking tool according to claim 6, characterized in that: The slide bar and the mounting hole are arranged in transitional cooperation.

8. The laser marking tool according to claim 4, characterized in that: The positioning block is provided with a positioning groove for the blade to be inserted into and positioned, and the positioning groove corresponds to the second calibration plate.

9. The laser marking tool according to claim 1, characterized in that: A reflector is disposed on the second calibration plate.

10. The laser marking tool according to claim 1, characterized in that: One side of the positioning block is a third positioning surface that is flush with the other, and the third positioning surface is parallel to the second calibration plate.

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