CN215839316U - Tibia sounding device - Google Patents

Abstract

The utility model provides a tibia sounding device, which belongs to the technical field of knee joint replacement and comprises a fixing component, a sounding component and a probe component; the fixing component is provided with a fixing shaft which is used for being screwed and fixed in the osteotomy module, the fixing shaft is provided with a mounting plate, the surface of the mounting plate is vertical to the axial direction of the fixing shaft and is used for being attached above the osteotomy platform of the osteotomy module or being inserted into the osteotomy groove of the osteotomy module; one end of the depth measuring component is connected with the top end of the fixing component, the other end of the depth measuring component extends upwards, and the extending end has freedom degree of axial movement along the fixing shaft; the probe subassembly wears to locate the probe subassembly on, the probe subassembly is provided with both ends and stretches out the probe of sounding subassembly, be used for the butt on the bone surface of tibial plateau, and the vertical distance between the butt end to the mounting panel of probe is for predetermineeing the bone thickness of cutting. The tibia depth measurement device provided by the utility model is simple in structure and convenient to operate.

Description

Tibia sounding device

Technical Field

The utility model belongs to the technical field of knee joint replacement, and particularly relates to a tibia sounding device.

Background

Knee joint replacement surgery is very common in orthopedic surgery, when a part of tibia needs to be replaced, an upper bone cutting module needs to be installed and fixed on the upper portion of a proximal rod of a tibia alignment device, and bone cutting of a tibial platform is carried out according to a bone cutting plane designed by an X-ray sheet and a retroversion angle required by a prosthesis with the help of a tibial bone marrow external positioning rod. In order to make the resected articular surface of the tibial plateau, namely the coronal surface and the shape of the tibial plateau, the same as the shape designed by the preoperative X-ray film, a tibial sounding device is adopted to determine the thickness of the cut bone.

When carrying out shin bone osteotomy, can put into the osteotomy groove with the swing saw bit, or flush the saw bit with osteotomy module upper surface, cut the bone on the osteotomy platform of osteotomy module promptly, among the prior art, often fix shin bone depth measuring device on the osteotomy module, for realizing that it is fixed firm, need set up all kinds of locking Assembly and fixed knot structure, often the structure is complicated, and the operation is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a tibia depth measurement device, and aims to solve the technical problem that an existing tibia depth measurement device is complex in structure and inconvenient to operate.

In order to achieve the purpose, the utility model adopts the technical scheme that: there is provided a tibial depth finding device comprising:

the fixing assembly is provided with a fixing shaft which is used for being screwed and fixed in the bone cutting module, the fixing shaft is provided with a mounting plate, the surface of the mounting plate is vertical to the axial direction of the fixing shaft and is used for being attached above a bone cutting platform of the bone cutting module or being inserted into a bone cutting groove of the bone cutting module;

one end of the depth measuring component is connected with the top end of the fixing component, the other end of the depth measuring component extends upwards, and the extending end has freedom degree of axial movement along the fixing shaft; and

the probe assembly penetrates through the depth measurement assembly, and two ends of the probe assembly extend out of the depth measurement assembly and are used for abutting against probes on the bone surface of the tibial plateau.

In a possible implementation manner, the mounting plate comprises a first fixing plate and a second fixing plate symmetrically fixed on the fixing shaft by taking the fixing shaft as a center, wherein the first fixing plate is used for being attached to the osteotomy platform, and the second fixing plate is used for being inserted into the osteotomy groove.

Exemplarily, a positioning part is arranged on the first fixing plate in a penetrating manner from top to bottom, and when the first fixing plate is attached to the osteotomy platform, the positioning part is abutted to the osteotomy module.

Illustratively, the second fixing plate is provided with an elastic pressing sheet which is suitable for abutting against the inner wall of the bone cutting groove when the mounting plate is inserted into the bone cutting groove.

In a possible implementation manner, the depth measurement assembly comprises a main shaft with a bottom end fixed on the fixing assembly and a sleeve sleeved on the main shaft; the sleeve is provided with a first end and a second end which deviates from the first end along the axial direction of the sleeve, the first end is in threaded connection with the outer peripheral wall of the main shaft, and the second end extends upwards along the axial direction of the main shaft and is detachably connected with the probe assembly. The sleeve is close to or far away from the mounting plate along the axial direction of the main shaft so as to drive the probe assembly to be close to or far away from the mounting plate, and the thickness of the osteotomy is changed.

In a possible implementation manner, the probe comprises a probe rod which is slidably arranged on the sleeve along the radial direction of the sleeve, and a first pen needle and a second pen needle which are fixed at two ends of the probe rod.

In some embodiments, the probe assembly is further provided with a fixing member for fixing the position of the probe rod relative to the sleeve, and one end of the fixing member is screwed with the second end along the axial direction of the sleeve and abuts against the probe rod.

Illustratively, the difference in height of the first needle and the second needle in the axial direction of the sleeve and the half of the lead of the connecting thread between the first end and the spindle are 2-3 mm.

In a possible implementation manner, a sleeve which is arranged along the axial extension of the main shaft and is in sliding connection with the outer peripheral wall of the first end is fixed at the top of the mounting plate, so that blood or impurities are prevented from splashing on the main shaft to influence the matching with the sleeve.

In some embodiments, the outer peripheral wall of the first end is provided with graduation marks.

The fixing shaft is arranged in the embodiment of the utility model, the device can be fixed on the bone cutting module, the device is also provided with the mounting plate fixed on the fixing shaft so as to reinforce the device, and the fixing component has a simple structure and is convenient to position; the mounting plate can be arranged above the bone cutting platform of the bone cutting module and fixed with the bone cutting platform so as to adapt to the operation mode of cutting bones on the bone cutting platform by the saw blade; meanwhile, the mounting plate can also be inserted into the bone cutting groove of the bone cutting module and fixed with the inner wall of the bone cutting groove so as to adapt to the operation mode of the saw blade for cutting bones in the bone cutting groove; make its other end be close to or keep away from through adjustment depth measurement subassembly the mounting panel, the butt tip that can drive the probe is close to or keeps away from the mounting panel to change the osteotomy thickness of predetermined outside tibial plateau, the change of osteotomy thickness and the convenient operation of adjustment.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural view of a tibial depth measurement device according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional structure view of a tibial depth measurement device according to an embodiment of the present invention;

fig. 3 is a schematic structural view of an elastic pressing sheet used in the embodiment of the present invention.

In the figure: 1. a fixing assembly; 11. a fixed shaft; 12. mounting a plate; 121. a first fixing plate; 122. a second fixing plate; 1221. mounting grooves; 123. a positioning member; 124. elastic tabletting; 2. a depth measurement component; 21. a main shaft; 22. a sleeve; 3. a probe assembly; 31. a probe; 311. a first pen needle; 312. a second pen needle; 32. a probe rod; 33. a fixing member; 4. a sleeve.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Referring to fig. 1 to 3 together, a tibia depth measurement device provided by the present invention will now be described. The tibia sounding device comprises a fixing component 1, a sounding component 2 and a probe component 3; the fixing component 1 is provided with a fixing shaft 11 which is used for being screwed and fixed in the bone cutting module of the knee joint puncture positioning device, a mounting plate 12 is arranged on the fixing shaft 11, and the surface of the mounting plate 12 is vertical to the axial direction of the fixing shaft 11 and is used for being attached above a bone cutting platform of the bone cutting module; or inserted into the bone cutting groove of the bone cutting module; one end of the depth measuring component 2 is connected with the top end of the fixing component 1, the other end extends upwards, and the extending end has the freedom degree of axial movement along the fixing shaft 11; the probe component 3 is arranged on the depth measurement component 2 in a penetrating mode, and the probe component 3 is provided with a probe 31, two ends of the probe 31 extend out of the depth measurement component 2 and are used for being abutted to the bone surface of the tibial plateau. It will be appreciated that the vertical distance between the abutting end of the probe 31 and the mounting plate 12 is a predetermined osteotomy thickness on the tibial plateau.

It should be noted that the bone cutting module belongs to the prior art, and when the knee joint replacement operation is performed, the bone cutting module needs to be positioned at the position, where the bone cutting is needed, of the upper end of the tibia, then the device is adopted to measure the thickness of the specifically needed bone cutting, and the part needing to be cut is cut off by the saw blade. And during the bone cutting, the tibial platform on the side which is damaged less on the bone cutting platform of the tibia is taken as a reference, the probe 31 is abutted to the side with less damage of the tibia, the bone is cut by 8mm or 10mm generally, the bone cutting groove is arranged on the bone cutting module, the distance from the generally arranged bone cutting groove to the bone cutting platform is a definite value with a small numerical value, and the situation that the distance exceeds the adjusting range of the depth measuring component 2 is avoided.

When the device is used, the mounting plate 12 can be fixed above a bone cutting platform of the bone cutting module, the fixing shaft 11 is screwed and fixed on the bone cutting module, the distance from the depth measuring component 2 to the mounting plate 12 is adjusted, the abutting end of the probe 31 is driven to be close to or far away from the mounting plate 12, the bone cutting thickness at the moment is also equal to the vertical distance from the abutting end of the probe 31 to the bone cutting platform, after the bone cutting thickness is adjusted to an appropriate value, the probe 31 abuts against the bone surface of the tibia platform, and the saw blade can be leveled with the upper surface of the bone cutting module, namely, the bone is cut on the bone cutting platform of the bone cutting module; also fix mounting panel 12 in the osteotomy groove of osteotomy module to fix the fixed axle 11 soon on the osteotomy module, the adjustment depth measurement subassembly 2 is to the distance of mounting panel 12, and the butt end that drives probe 31 is close to or keeps away from mounting panel 12, and the osteotomy thickness at this moment is equivalent to the butt end of probe 31 and to the distance in osteotomy groove, waits to adjust to cut bone thickness to the suitable value after, makes probe 31 butt on the bone surface of tibial plateau, can cut the bone with the saw bit inserted into osteotomy inslot.

Compared with the prior art, the fixing shaft 11 is arranged in the embodiment of the utility model, the device can be fixed on the bone cutting module, the mounting plate 12 fixed on the fixing shaft 11 is also arranged in the device, so that the device is reinforced, and the fixing component 1 is simple in structure and convenient to position; the mounting plate 12 can be arranged above the bone cutting platform of the bone cutting module and fixed with the bone cutting platform so as to adapt to the operation mode of cutting bones on the bone cutting platform by the saw blade; meanwhile, the mounting plate 12 can also be inserted into the bone cutting groove of the bone cutting module and fixed with the inner wall of the bone cutting groove so as to adapt to the operation mode of cutting the bone by the saw blade in the bone cutting groove; make its other end be close to or keep away from mounting panel 12 through adjustment depth measurement subassembly 2, can drive the butt tip of probe 31 and be close to or keep away from mounting panel 12 to change the osteotomy thickness of predetermined outside tibial plateau, the change of osteotomy thickness and the convenient operation of adjustment.

Specifically, referring to fig. 1, the mounting plate 12 includes a first fixing plate 121 and a second fixing plate 122 symmetrically fixed on the fixing shaft 11 with the fixing shaft 11 as a center, wherein the first fixing plate 121 is used for being attached to the osteotomy platform, and the second fixing plate 122 is used for being inserted into the osteotomy groove. The first fixing plate 121 and the second fixing plate 122 are arranged on two opposite sides of the fixing shaft 11, so that the first fixing plate 121 is prevented from interfering with the bone cutting module when being fixed, and the fixation of the device is prevented from being influenced. The first fixing plate 121 is used for being mounted above a bone cutting platform of the bone cutting module and fixed with the bone cutting platform; the second fixing plate 122 is inserted into the bone cutting groove of the bone cutting module and fixed to the inner wall of the bone cutting groove.

Optionally, the first fixing plate 121 is provided with a positioning element 123 penetrating up and down, and when the first fixing plate 121 is attached to the osteotomy platform, the positioning element 123 abuts against the osteotomy module. Through passing first fixed plate 121 and the fixed of first fixed plate 121 is realized to the butt on the osteotomy module with setting element 123, avoid this device to take place to rock when carrying out excision operation or depth measurement subassembly 2 adjustment, lead to the location inaccurate, influence osteotomy thickness.

Optionally, referring to fig. 3, the second fixing plate 122 is provided with an elastic pressing piece 124 adapted to abut against the inner wall of the osteotomy groove when the mounting plate 12 is inserted into the osteotomy groove. Specifically, set up mounting groove 1221 on second fixed plate 122, the one end of elastic pressing piece 124 is fixed in one side of mounting groove 1221, the bottom surface of vertical direction skew second fixed plate 122 is followed to the other end, when second fixed plate 122 inserts cuts the bone inslot, because second fixed plate 122 equals with the thickness in cutting the bone groove, the other end of this elastic pressing piece 124 is impressed in mounting groove 1221, fix second fixed plate 122 in cutting the bone inslot, avoid this device to take place to rock when carrying out excision operation or depth measurement subassembly 2 adjustment, lead to the location inaccurate, influence and cut bone thickness.

In some possible embodiments, the depth measuring assembly 2 includes a main shaft 21 fixed at the bottom end to the fixing assembly 1 and a sleeve 22 sleeved on the main shaft 21; the sleeve 22 has a first end and a second end facing away from the first end of the sleeve 22 along the axial direction of the sleeve 22, the first end of the sleeve 22 is in threaded connection with the outer peripheral wall of the main shaft 21, and the second end of the sleeve 22 extends upward along the axial direction of the main shaft 21 and is detachably connected with the probe assembly 3. Rotating the sleeve 22 toward or away from the mounting plate 12 brings the probe assembly 3 on the sleeve 22 toward or away from the mounting plate 12 to effect a change in the thickness of the osteotomy.

In the embodiment of the present invention, the probe 31 includes a probe 32 slidably disposed on the sleeve 22 along a radial direction of the sleeve 22, and a first needle 311 and a second needle 312 fixed at two ends of the probe 32. Preferably, the probe 32 is inserted through the middle of the sleeve 22 along the radial direction of the sleeve 22, and the probe 32 slides along the direction perpendicular to the axial direction of the sleeve 22, and the first pen needle 311 and the second pen needle 312 are used for abutting against the tibial plateau.

In addition, the probe assembly 3 is further provided with a fixing member 33 for fixing the position of the probe 32 relative to the sleeve 22, and one end of the fixing member 33 is screwed with the second end of the sleeve 22 along the axial direction of the sleeve 22 and abuts on the probe 32. Preferably, the middle of the sleeve 22 is provided with a mounting hole, and the position of the mounting hole is higher than the height of the screwing hole of the sleeve 22 and the main shaft 21, the probe rod 32 slides in the mounting hole along the radial direction of the sleeve 22 to change the distance of the probe 31 extending out of the sleeve 22, so as to adapt to different sizes of shines, and enable the abutting end of the probe 31 to abut on the proper position of the shin. Meanwhile, the probe 32 is fixed in the sleeve 22 through the fixing part 33, so that the probe 32 is prevented from sliding to influence positioning during bone cutting operation.

Specifically, the difference in height of the first pen needle 311 and the second pen needle 312 in the axial direction of the barrel 22 is 2 to 3mm as the sum of half the lead of the connecting thread between the first end of the barrel 22 and the main shaft 21. In the osteotomy operation, the requirement for the height of the osteotomy on both sides of the tibia is different, and the height difference is often controlled to be 2-3mm, therefore, the first pen needle 311 and the second pen needle 312 are provided in the present device, for example, the height of the first pen needle 311 is higher than that of the second pen needle 312, preferably, when the sum of the axial distance between the first pen needle 311 and the second pen needle 312 along the sleeve 22 and the half of the lead of the connecting thread between the first end of the sleeve 22 and the main shaft 21 is 2mm, if the osteotomy distance on the other side needs to be reduced by 2mm, the device does not need to be detached for adjustment, only the sleeve 22 needs to be rotated by 180 °, at this time, the sleeve 22 is raised by the half of the lead of the connecting thread, and the distance height between the first pen needle 311 and the second pen needle 312 is increased, at this time, the requirement for the height of the osteotomy can be satisfied.

It should be noted that the lead refers to the axial distance between two points on the pitch diameter corresponding to two adjacent threads on the same spiral line, and for a multiple thread, the thread rotates one turn and advances by one lead. Since the lead of the connecting thread between the first end of the sleeve 22 and the main shaft 21 is 4mm when half of the lead of the connecting thread is 2mm, at this time, if the connecting thread is a double-line thread, the thread pitch of the thread is 2mm, the machining precision of the thread is not high, which may cause the deterioration of the adjustment precision, and may affect the accuracy of the bone cutting thickness calculation in the operation, it is necessary to ensure that the sum of the axial distance along the sleeve 22 between the first pen needle 311 and the second pen needle 312 and the half of the lead of the connecting thread between the first end of the sleeve 22 and the main shaft 21 is 2mm when the heights of the first pen needle 311 and the second pen needle 312 are designed.

In addition, referring to fig. 1, a sleeve 4 extending along the axial direction of the spindle 21 and slidably connected to the outer peripheral wall of the first end of the sleeve 22 is fixed to the top of the mounting plate 12, and the sleeve 4 is used to protect the screwed joint between the spindle 21 and the sleeve 22, so as to prevent blood or impurities from splashing on the spindle 21 to affect the fit with the sleeve 22.

It should be noted that the first end of the sleeve 22 is provided with graduation marks on its outer circumferential wall, which are suitable for observing the distance by which the sleeve 22 slides out of the extended end of the sleeve 4. Specifically, the scale marks are arranged on the peripheral wall of the sleeve 22, when the sleeve 22 rotates upwards on the spindle 21 along the axis of the sleeve 22, the peripheral wall of the sleeve 22 slides out of the sleeve 4, the scale marks are exposed out of the sleeve 4, marks of the scale marks can be made according to the distance from the first pen needle 311 and the second pen needle 312 to the mounting plate 12, and the marks are marked on the peripheral wall of the sleeve 22 respectively in different colors, so that the observation is convenient when the bone cutting thickness is adjusted.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. Shin bone sounding device, its characterized in that includes:

the fixing assembly is provided with a fixing shaft which is used for being screwed and fixed in the bone cutting module, the fixing shaft is provided with a mounting plate, the surface of the mounting plate is vertical to the axial direction of the fixing shaft and is used for being attached above a bone cutting platform of the bone cutting module or being inserted into a bone cutting groove of the bone cutting module;

one end of the depth measuring component is connected with the top end of the fixing component, the other end of the depth measuring component extends upwards, and the extending end has freedom degree of axial movement along the fixing shaft; and

the probe assembly penetrates through the depth measurement assembly, and two ends of the probe assembly extend out of the depth measurement assembly and are used for abutting against probes on the bone surface of the tibial plateau.

2. The tibial depth measurement device of claim 1, wherein the mounting plate comprises a first fixing plate and a second fixing plate symmetrically fixed to the fixed shaft centering on the fixed shaft, wherein the first fixing plate is configured to be attached to the osteotomy platform, and the second fixing plate is configured to be inserted into the osteotomy groove.

3. The tibia depth measurement device according to claim 2, wherein a positioning piece penetrates through the first fixing plate from top to bottom, and the positioning piece abuts against the bone cutting module when the first fixing plate is attached to the bone cutting platform.

4. The tibial depth measurement device of claim 2, wherein said second fixation plate is provided with a resilient tab adapted to abut an inner wall of said osteotomy groove when said mounting plate is inserted into said osteotomy groove.

5. The tibial depth measurement device of claim 1, wherein the depth measurement assembly comprises a main shaft having a bottom end fixed to the fixation assembly and a sleeve fitted over the main shaft; the sleeve is provided with a first end and a second end which deviates from the first end along the axial direction of the sleeve, the first end is in threaded connection with the outer peripheral wall of the main shaft, and the second end extends upwards along the axial direction of the main shaft and is detachably connected with the probe assembly.

6. The tibial depth measurement device of claim 5, wherein the probe comprises a probe rod slidably disposed through the sleeve in a radial direction of the sleeve, and a first needle and a second needle fixed to both ends of the probe rod.

7. The tibial depth measurement device of claim 6, wherein the probe assembly further comprises a fixing member, one end of the fixing member is screwed with the second end along the axial direction of the sleeve and abuts against the probe rod.

8. The tibial depth measurement device of claim 7, wherein the difference in height of said first and second pins along the axial direction of said sleeve, and the sum of half the lead of the connecting thread between said first end and said main shaft, is 2-3 mm.

9. A tibial depth finding device according to claim 5 wherein a spigot is fixed to the top of the mounting plate extending axially of the main shaft and slidably connected to the peripheral wall of the first end.

10. The tibial depth measurement device of claim 9, wherein the peripheral wall of the first end is provided with graduations.

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