Osteotomy protection tool

Abstract

The utility model relates to an osteotomy protection tool which comprises a limiting part and a protection part, a limiting plane is arranged on the limiting part, a protection plane is arranged on the protection part, the protection plane and the limiting plane are arranged in a coplanar mode, and the protection plane and the limiting plane form a through plane. And the through plane is used for supporting and limiting the saw blade. The through plane of the osteotomy protection tool can limit the whole saw blade, so that the saw blade is prevented from overcutting the tibia plane, and the safety in an operation is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field especially is a kind of osteotomy protection tool. BACKGROUND

[0002] Knee joint is one of the largest and most important joints of human body, and the damage of knee joint will seriously affect the activity function of patients and reduce their quality of life. At present, total knee arthroplasty and unicompartmental arthroplasty are generally adopted for knee joint damage. Since unicompartmental arthroplasty has the advantages of long service life, good limb alignment and easy to perform total knee arthroplasty again, unicompartmental arthroplasty has achieved good development in knee joint damage surgery, and the long-term effect of unicompartmental arthroplasty is also getting better and better.

[0003] In unicompartmental arthroplasty, it is easy to occur the phenomenon of osteotomy too deep when longitudinally osteotomizing tibial plateau, and there is no corresponding protector to limit osteotomy of saw blade in all aspects, which may cause tibial plateau fracture and reduce the safety of patients in unicompartmental arthroplasty. SUMMARY

[0004] To solve the above technical problems, the utility model provides an osteotomy protection tool, which can prevent the phenomenon of osteotomy too deep when longitudinally osteotomizing tibial plateau and improve the safety of unicompartmental arthroplasty.

[0005] To achieve the above purpose, the utility model provides an osteotomy protection tool, which comprises a limiting portion and a protection portion, a limiting plane is arranged on the limiting portion, a protection plane is arranged on the protection portion, the protection plane and the limiting plane are arranged in the same plane, and the protection plane and the limiting plane form a through plane for supporting and limiting the saw blade.

[0006] In an embodiment of the utility model, a handle portion is further included, the handle portion comprises a grip portion and an intermediate connecting portion, the intermediate connecting portion is arranged between the limiting portion and the grip portion, and the intermediate connecting portion has a preset length.

[0007] In an embodiment of the utility model, the intermediate connecting portion is arranged in the direction of Z direction away from the limiting plane, and the included angle between the intermediate connecting portion and the limiting plane is obtuse.

[0008] In an embodiment of the utility model, a scale line is arranged on the protection plane in the direction of Y direction.

[0009] In an embodiment of the utility model, the end portion of the protection portion away from the limiting portion is a circular arc transition portion.

[0010] In one embodiment of the utility model, the width of the protection part is formed with abutting plane and first plane on both sides, the abutting plane and the first plane form a symmetry plane, and the center of the arc transition part is located on one side of the symmetry plane close to the abutting plane.

[0011] In one embodiment of the utility model, the handle part is bent away from the abutting plane on one side along the X direction, the handle part is bent away from the arc transition part on one side along the negative Y direction, and the handle part is bent away from the limiting plane on one side along the Z direction.

[0012] In one embodiment of the utility model, the limiting part is formed with a limiting protrusion extending in the negative X direction away from the handle part.

[0013] In one embodiment of the utility model, the limiting part is formed with a bone-cutting guide line along the Y direction.

[0014] In one embodiment of the utility model, the end of the handle part away from the limiting part is a symmetry end, and the handle, the limiting part and the protection part are rotationally symmetrically arranged about the symmetry end.

[0015] The above technical solution of the utility model has the following advantages compared with the prior art:

[0016] (1) The limiting plane is arranged on the limiting part, when the end of the reciprocating saw is raised, the root is prone to overcutting the tibial plane, the limiting plane is used for limiting the root of the reciprocating saw during longitudinal cutting, so that the root of the reciprocating saw is prevented from overcutting the tibial plane, and the intraoperative safety is improved; the protection plane is arranged on the protection part, when the root of the reciprocating saw is raised, the end is prone to overcutting the tibial plane, the protection plane is used for limiting the end of the reciprocating saw during longitudinal cutting, so that the end of the reciprocating saw is prevented from overcutting the tibial plane, and the intraoperative safety is improved; meanwhile, the limiting plane and the protection plane form a through plane, the reciprocating saw as a whole can be limited through the through plane, so that the overcutting of the tibial plane by the whole part of the reciprocating saw is prevented, and the intraoperative safety is improved.

[0017] (2) The protection tool of the application is not used on the periphery of the tibia, but the protection part of the protection tool is inserted into the cutting groove formed by the horizontal cutting of the swing saw, and the reciprocating saw is limited by the whole protection part in the cutting groove, so that the overcutting of the tibial plane at the bottom of the cutting groove is prevented, the safety performance of the protection tool is effectively improved, and the success rate of the operation is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the present utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, obviously, the drawings described in the following are only some embodiments of the present utility model, and for the ordinary skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0019] Figure 1 It is the first structure schematic diagram of the bone cutting protection tool of the present utility model;

[0020] Figure 2 It is Figure 1 the top view;

[0021] Figure 3 It is Figure 1 the left view;

[0022] Figure 4 It is the second structure schematic diagram of the bone cutting protection tool of the present utility model;

[0023] Figure 5 It is the third structure schematic diagram of the bone cutting protection tool of the present utility model;

[0024] Figure 6 It is the first cooperation schematic diagram of the bone cutting protection tool and the shinbone of the present utility model;

[0025] Figure 7 It is the second cooperation schematic diagram of the bone cutting protection tool and the shinbone of the present utility model.

[0026] Description of the drawings of the specification:

[0027] 1, limiting portion;2, protection part;3, limiting plane;4, protection plane;5, through plane;6, handle part;7, handle part;8, intermediate connecting part;9, scale line;10, circular arc transition part;11, abutment plane;12, first plane;13, symmetry plane;14, limiting protrusion;15, bone cutting guide line;16, symmetric end;17, cutting groove;18, side wall;19, shinbone. Specific implementation

[0028] In order to make the purpose, technical scheme and advantages of the present utility model more clear, the following will combine the drawings in the embodiments of the present utility model, and the technical scheme in the embodiments of the present utility model will be clearly and completely described, obviously, the described embodiments are only some embodiments of the present utility model, but not all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the present utility model.

[0029] Refer to Figures 1-7As shown, the osteotomy protection tool of the utility model, including spacing part 1 and protection part 2, spacing part 1 is provided with spacing plane 3, protection part 2 is provided with protection plane 4, protection plane 4 and spacing plane 3 are coplanar, and protection plane 4 and spacing plane 3 form through plane 5, and the through plane 5 is used to support and limit saw blade.

[0030] The unicompartmental arthroplasty first cuts the tibia transversely to form a tibial plane by swing saw, and then cuts longitudinally by reciprocating saw, and the overcut phenomenon of the tibial plane is prone to occur when cutting longitudinally by reciprocating saw. The osteotomy protection tool of the present application is formed with a through plane 5, which limits the tibia during osteotomy to prevent the overcut phenomenon of the tibia. Specifically, the osteotomy protection tool of the present application includes a spacing part 1 and a protection part 2, as shown in Figure 1 The spacing part 1 and the protection part 2 are connected in sequence, and the spacing part 1 and the protection part 2 are preferably integrally formed. Among them, the spacing part 1 and the protection part 2 together provide support for the reciprocating saw when cutting the tibia longitudinally to prevent overcutting. Further, when cutting the tibia, the doctor manually operates, so the root or end of the reciprocating saw may be raised. The spacing part 1 is provided with a spacing plane 3, and when the end of the reciprocating saw is raised, the root of the reciprocating saw is prone to overcut the tibial plane. The spacing plane 3 is used to limit the root of the reciprocating saw during longitudinal cutting to prevent the root of the reciprocating saw from overcutting the tibial plane, thereby improving the safety during the operation. The protection part 2 is provided with a protection plane 4, and when the root of the reciprocating saw is raised, the end of the reciprocating saw is prone to overcut the tibial plane. The protection plane 4 is used to limit the end of the reciprocating saw during longitudinal cutting to prevent the end of the reciprocating saw from overcutting the tibial plane, thereby improving the safety during the operation. At the same time, the spacing plane 3 and the protection plane 4 form a through plane 5, which can limit the entire reciprocating saw to prevent the entire reciprocating saw from overcutting the tibial plane, thereby improving the safety during the operation. In addition, the protection tool of the present application is not used on the periphery of the tibia, but the protection part 2 of the protection tool is inserted into the cutting groove 17 formed by the swing saw cutting the tibia transversely, and the entire protection part 2 is used to limit the reciprocating saw in the cutting groove 17 to prevent overcutting of the tibial plane at the bottom of the cutting groove, thereby effectively improving the safety of the protection tool and further improving the success rate of the operation. In addition, not only the reciprocating saw is used during the operation, but also other instruments that may be used during the operation can be safely protected by the osteotomy protection tool of the present application.

[0031] In one of the embodiments, the tool further comprises a handle part 6, the handle part 6 comprising a grip part 7 and an intermediate connecting part 8, the intermediate connecting part 8 being arranged between the limiting part 1 and the grip part 7, and the intermediate connecting part 8 having a preset length.

[0032] As shown in Figure 1 , the tool comprises a handle part 6, a limiting part 1 and a protection part 2, and the handle part 6, the limiting part 1 and the protection part 2 are integrally formed. Specifically, the handle part 6 comprises a grip part 7 and an intermediate connecting part 8, the grip part 7 being convenient for the doctor to hold and operate; the intermediate connecting part 8 is arranged between the limiting part 1 and the grip part 7, and the intermediate connecting part 8 has a preset length, through which enough operation space can be provided for the doctor to hold and operate the grip part 7, and the holding and operating of the tool by the doctor is facilitated, and the cutting efficiency is improved.

[0033] In one of the embodiments, the intermediate connecting part 8 is arranged in a bent manner in a direction away from the limiting plane 3 along the Z direction, and the included angle between the intermediate connecting part 8 and the limiting plane 3 is an obtuse angle.

[0034] In order to prevent the tool from interfering with the reciprocating saw when the doctor holds the tool, the intermediate connecting part 8 of the tool is arranged in a bent manner. Specifically, the thickness direction of the protection part 2 is the first direction, i.e., the Z direction as shown in Figure 1 and Figure 3 , the intermediate connecting part 8 is arranged in a bent manner in a direction away from the reciprocating saw during the tibia cutting process, i.e., the intermediate connecting part 8 is arranged in a bent manner in a direction away from the limiting plane 3 along the first direction (Z direction), so as to reserve sufficient operation space above the through plane 5, and prevent the reciprocating saw from interfering with the doctor's hand during the tibia cutting operation, and facilitate the holding and operating of the tool by the doctor. Further, the included angle between the intermediate connecting part 8 and the limiting plane 3 is an obtuse angle, so as to reserve sufficient operation space on the side of the tibia close to the doctor, and prevent the doctor's hand from interfering with the tibia during the use of the tool, and facilitate the holding and operating of the tool by the doctor.

[0035] In one of the embodiments, a scale line 9 is arranged on the protection plane 4 along the Y direction.

[0036] In order to facilitate the doctor to confirm the insertion depth of the tool in the cutting groove 17 formed by the swing saw during the transverse cutting of the tibia, the scale line 9 is arranged on the protection plane 4. Specifically, as shown in Figure 1 and Figure 2The Y direction is shown, the scale line 9 arranged on the protection plane 4 is arranged along the Y direction, and the scale line 9 continuously penetrates when the protection tool is inserted into the cutting groove 17 formed by the swing saw for transverse cutting of the tibia; the doctor can determine the insertion depth through the scale line 9, the protection tool is prevented from being excessively inserted into the cutting groove 17, and the blood vessels, nerve tissues and the like of the tibia are protected to a certain extent.

[0037] In one of the embodiments, the end of the protection part 2 away from the limiting part 1 is a circular arc transition part 10.

[0038] As shown in Figure 1 and Figure 2 the end of the protection part 2 away from the limiting part 1 is a circular arc transition part 10, and the circular arc transition can protect the blood vessels, nerve tissues and the like of the tibia when the protection tool is inserted into the cutting groove 17 formed by the swing saw for transverse cutting of the tibia.

[0039] In one of the embodiments, the width of the protection part 2 is formed with an abutting plane 11 and a first plane 12 on both sides respectively, a symmetry plane 13 is formed between the abutting plane 11 and the first plane 12, and the center of the circular arc transition part 10 is located on the side of the symmetry plane 13 close to the abutting plane 11.

[0040] As shown in Figure 2 the two sides of the protection part 2 are two parallel planes, one of which is an abutting plane 11, and the other is a first plane 12. The abutting plane 11 abuts against the side wall 18 of the cutting groove 17 to be positioned when the protection tool is inserted into the cutting groove 17 formed by the swing saw for transverse cutting of the tibia. A symmetry plane 13 is formed between the abutting plane 11 and the first plane 12, and the center of the circular arc transition part 10 is located on the side of the symmetry plane 13 close to the abutting plane 11, i.e., on the left side of the symmetry plane 13 as shown in Figure 2 , the shape of the circular arc transition part 10 is as shown in Figure 2 The circular arc transition part 10 not only protects the blood vessels, nerve tissues and the like of the tibia to a certain extent, but also has a guiding effect when the protection tool is inserted into the cutting groove 17 formed by the swing saw for transverse cutting of the tibia, so that the circular arc transition part 10 of the protection tool is in contact with the muscle tissue when the protection tool is inserted into the cutting groove 17 formed by the swing saw for transverse cutting of the tibia, the circular arc transition part 10 of the protection tool is guided into the cutting groove 17 formed by the swing saw for transverse cutting of the tibia through the muscle tissue around the tibia, and the protection tool is prevented from being separated from the cutting groove 17 formed by the swing saw for transverse cutting of the tibia.

[0041] In one embodiment, the handle portion 7 is bent along the X direction away from the side of the abutment plane 11, the handle portion 7 is bent along the negative Y direction away from the side of the arc transition portion 10, and the handle portion 7 is bent along the Z direction away from the side of the limiting plane 3.

[0042] The grip portion 7 needs to be set at a certain angle to reserve sufficient operating space for the doctor's hand. Specifically, the width direction of the protection portion 2 is the third direction, that is, the X direction. Figure 1 and Figure 2 As shown, the handle portion 7 is Figure 2 The handle 7 is bent toward the right side, that is, the handle 7 is bent along the side away from the contact plane 11 in the third direction to reserve sufficient operating space for the doctor's hand and prevent interference between the doctor's hand and the tibia. Figure 2 As shown, the handle portion 7 is Figure 2 The handle portion 7 is bent downward, that is, the handle portion 7 is bent in the second direction along the side away from the arc transition portion 10 (negative Y direction) to reserve sufficient operating space for the doctor's hand and prevent interference between the doctor's hand and the tibia. Figure 3 As shown, the handle portion 7 is Figure 3 The handle portion 7 is bent downward in the first direction, that is, the handle portion 7 is bent along the side away from the limiting plane 3 to reserve sufficient operating space above the limiting plane 3 and the protection plane 4 to prevent the reciprocating saw from interfering with the doctor's hand during the tibia cutting operation, making it inconvenient for the doctor to hold the protective tool.

[0043] In one embodiment, a limiting protrusion 14 is formed on the limiting portion 1 and extends in the negative X direction away from the handle portion 7 .

[0044] like Figure 6 and Figure 7 As shown, when the protective tool is inserted into the groove 17 formed by the oscillating saw when transversely cutting the tibia, the abutting plane 11 contacts the sidewall 18 of the groove 17 to position the tool. Therefore, a limiting protrusion 14 is formed on the limiting portion 1, extending away from the handle portion 7 in the third direction (negative X direction). In other words, the limiting protrusion 14 is formed on the limiting portion 1, extending toward one side of the abutting plane 11. When the protective tool is inserted into the groove 17 formed by the oscillating saw when transversely cutting the tibia, the limiting protrusion 14 can be limited by the tibia, preventing the protective tool from being inserted too far into the groove 17 formed by the oscillating saw when transversely cutting the tibia, thereby providing a certain degree of protection for the blood vessels, nerve tissue, etc. of the tibia.

[0045] In one embodiment, an osteotomy guide line 15 is formed on the limiting portion 1 along the Y direction.

[0046] like Figure 2As shown, the edge of the limiting part 1 forms a bone-cutting guide line 15 in the second direction, which plays a guiding role for the doctor when cutting the tibia by reciprocating saw, preventing the reciprocating saw from deviating in the left-right direction and affecting the cutting effect.

[0047] In one embodiment, the end of the handle part 6 away from the limiting part 1 is a symmetric end 16, and the handle, limiting part 1 and protection part 2 are arranged in rotational symmetry about the symmetric end 16.

[0048] As shown in Figure 4 and Figure 5 , the protection tool of the present application is arranged in rotational symmetry. Specifically, the end of the handle part 6 away from the limiting part 1 is a symmetric end 16, and the handle, limiting part 1 and protection part 2 are arranged in rotational symmetry about the symmetric end 16. Therefore, when the tibia of the patient needs to be cut as shown in Figure 6 , i.e. a transverse cut is needed to form a cut groove 17 from the right side of the tibia 19 in Figure 6 , then the left end of the protection tool in Figure 4 needs to be inserted into the cut groove 17 formed by the transverse cutting of the tibia by the swing saw; when the tibia of the patient needs to be cut as shown in Figure 7 , i.e. a transverse cut is needed to form a cut groove 17 from the left side of the tibia 19 in Figure 7 , then the right end of the protection tool in Figure 4 needs to be inserted into the cut groove 17 formed by the transverse cutting of the tibia by the swing saw, without the need to change the protection tool, which is equivalent to integrating the two protection tools into one, and the doctor can directly rotate the other side of the protection part 2 to insert it into the corresponding cut groove 17 when using it. The entire protection tool is integrally formed in rotational symmetry.

[0049] Note that the above is only a preferred embodiment of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. An osteotomy protection tool, characterized by: The utility model relates to a saw blade limiting device, including limiting part (1) and protection part (2), limiting plane (3) is provided on limiting part (1), protection plane (4) is provided on protection part (2), protection plane (4) and limiting plane (3) are coplanar arrangement, and protection plane (4) and limiting plane (3) form through plane (5), and the through plane (5) is used for supporting and limiting saw blade.

2. The osteotomy protection tool of claim 1, wherein: Also including handle part (6), handle part (6) includes handle part (7) and intermediate connecting part (8), intermediate connecting part (8) is arranged between limiting part (1) and handle part (7), and intermediate connecting part (8) has preset length.

3. The osteotomy protection tool of claim 2, wherein: Intermediate connecting part (8) is arranged in the direction of Z direction away from limiting plane (3), and the included angle between intermediate connecting part (8) and limiting plane (3) is obtuse.

4. The osteotomy protection tool of claim 1, wherein: Scale line (9) is arranged on protection plane (4) along Y direction.

5. The osteotomy protection tool of claim 2, wherein: The end of protection part (2) away from limiting part (1) is circular arc transition part (10).

6. The osteotomy protection tool of claim 5, wherein: The width of protection part (2) forms abutment plane (11) and first plane (12) on both sides respectively, the symmetric plane (13) is formed between abutment plane (11) and first plane (12), and the center of circular arc transition part (10) is located on the side of symmetric plane (13) close to abutment plane (11).

7. The osteotomy protection tool of claim 6, wherein: Handle part (7) is bent away from the side of abutment plane (11) along X direction, handle part (7) is bent away from the side of circular arc transition part (10) along negative Y direction, and handle part (7) is bent away from the side of limiting plane (3) along Z direction.

8. The osteotomy protection tool of claim 7, wherein: Limiting convex (14) is formed on limiting part (1) along the direction of negative X direction away from handle part (7).

9. The osteotomy protection tool of claim 4, wherein: Osteotomy guide line (15) along Y direction is formed on limiting part (1).

10. The osteotomy protection tool of claim 2, wherein: The end of handle part (6) away from limiting part (1) is symmetric end (16), and handle, limiting part (1) and protection part (2) are rotationally symmetrically arranged about symmetric end (16).

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