Combined reamer

Abstract

The utility model discloses a combined reamer, which particularly relates to the technical field of medical equipment and comprises a rotating rod, a measurer and a handle, the measurer is mounted below the rotating rod, the handle is inserted into one side of the measurer, a power connecting end is arranged at the top end of the rotating rod, a rotating blade head is arranged at the bottom end of the rotating rod, and a rotating blade is arranged on the lower surface of the rotating blade head. And a plurality of groups of measurer connecting holes are formed in the rotary blade head. According to the utility model, the conventional structural design is improved, and an assembled design is adopted, so that different components can be selected and matched according to the sizes of spherical cartilages of different spherical joints, and different components can also be selected and matched according to the sizes of the same spherical cartilages with different injury or lesion areas, thereby providing experience close to a customized tool for an operator (or a user), and realizing accurate forming.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, and more specifically, to a combined reamer. Background Art

[0002] Hip replacement (THA) is one of the greatest surgical procedures in the past 50 years. It can effectively eliminate pain, correct joint deformities, and restore patients' mobility. However, some patients with femoral head necrosis do not reach the severity of THA, but their quality of life is greatly reduced. In view of this, for patients with ARCO II & III femoral head necrosis who do not involve the physiological acetabulum, the prosthesis can be customized according to the location of femoral head necrosis. However, the shaping of the femoral head necrosis position has always been the focus of doctors. At present, there is no tool system for precise shaping of the femoral head.

[0003] There are two commonly used shaping methods at this stage. The first method is to use a medullary drill for shaping. This method is simple to operate, but it requires drilling inside the femoral head, which reduces the strength of the femoral head, and it is also impossible to accurately file the necrotic area, and there are often insufficient or excessive filings. The second method is to use an acetabular rasp to shape the femoral head. This method does not require drilling inside the femoral head. Since it is a point-to-point contact at the beginning, it is very easy to shift the filing, and the shaping position and area cannot be controlled.

[0004] In view of the above problems, the present invention designs a combined reamer tool, which can remove the necrotic or diseased cartilage layer on the surface of the femoral head, avoid damage to the healthy bone inside the femoral head, and select appropriate components according to the ball diameter of the femoral head and the size of the necrotic area. The forming position and area can be controlled to achieve precise grinding. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides a combined reamer to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a combined reamer, including a rotary rod, a measuring device, a handle, a power connection end, a rotary blade head, a rotary blade, a measuring device connection hole, a connecting column, a handle connection hole, and an observation hole. A measuring device is installed below the rotary rod, a handle is plugged into one side of the measuring device, a power connection end is provided at the top end of the rotary rod, a rotary blade head is provided at the bottom end of the rotary rod, a rotary blade is provided on the lower surface of the rotary blade head, and a plurality of groups of measuring device connection holes are provided on the rotary blade head.

[0007] As a further improvement of the technical solution of the utility model, multiple groups of connecting columns are provided on the upper surface of the measuring device, and handle connecting holes are opened near the outer side of the connecting columns, wherein multiple groups of observation holes are opened equidistantly on the periphery of the measuring device.

[0008] As a further improvement of the technical solution of the utility model, a fitting surface is provided on the periphery of the rotary blade head, and the fitting surface is engaged with the upper plane of the measuring device.

[0009] As a further improvement of the technical solution of the utility model, the connecting column on the measuring device is engaged and docked with the connecting hole of the measuring device on the rotary blade head.

[0010] As a further improvement of the technical solution of the utility model, the handle connecting hole on the measuring device is threadedly connected to the end of the handle.

[0011] As a further improvement of the technical solution of the utility model, the lower surface of the rotary blade head is an arc-shaped structure.

[0012] As a further improvement of the technical solution of the utility model, a plurality of sets of gaskets can be sleeved on the connecting column, and the gaskets are used to adjust the depth of the rotary blade head.

[0013] As a further improvement of the technical solution of the utility model, the measuring device is designed as a hemispherical structure.

[0014] Technical effects and advantages of the utility model:

[0015] The utility model improves the previous structural design and adopts a modular design. Different components can be selected according to the sizes of spherical cartilages of different acetabulum joints, and different components can be selected according to the areas of different injuries or lesions of the same spherical cartilage size, providing the surgeon (or user) with an experience close to that of a customized tool and achieving precise molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 It is a structural schematic diagram of the rotating rod in the utility model.

[0018] Figure 3 It is a structural schematic diagram of the measuring device in the utility model.

[0019] The reference numerals in the drawings are: 1 rotary rod, 2 measuring device, 3 handle, 4 power connection end, 5 rotary blade head, 6 rotary blade, 7 measuring device connection hole, 8 connecting column, 9 handle connection hole, 10 observation hole. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] As attached Figure 1 , Attachment Figure 2 and attached Figure 3 A combined reamer shown in the figure comprises a rotary rod 1, a measuring device 2, a handle 3, a power connection end 4, a rotary blade head 5, a rotary blade 6, a measuring device connection hole 7, a connecting column 8, a handle connection hole 9, and an observation hole 10. The measuring device 2 is installed below the rotary rod 1, and the handle 3 is plugged into one side of the measuring device 2. The top end of the rotary rod 1 is provided with a power connection end 4, and the bottom end of the rotary rod 1 is provided with a rotary blade head 5. The lower surface of the rotary blade head 5 is provided with a rotary blade 6, and a plurality of groups of measuring device connection holes 7 are provided on the rotary blade head 5.

[0022] A plurality of connection columns 8 are disposed on the upper surface of the measuring device 2 , and handle connection holes 9 are provided near the outer sides of the connection columns 8 , wherein a plurality of observation holes 10 are provided at equal intervals on the periphery of the measuring device 2 .

[0023] Furthermore, a fitting surface is provided on the periphery of the rotary blade head 5 , and the fitting surface is engaged with the upper plane of the measuring device 2 .

[0024] Furthermore, the connecting column 8 on the measuring device 2 is engaged with the measuring device connecting hole 7 on the rotary blade head 5, so that the measuring device 2 can be easily installed.

[0025] Furthermore, the handle connection hole 9 on the measuring device 2 is threadedly connected to the end of the handle 3, so as to facilitate the assembly of the handle 3.

[0026] Furthermore, the lower surface of the blade head 5 is an arc-shaped structure; a plurality of sets of gaskets can be sleeved on the connecting column 8, and the gaskets are used to adjust the depth of the blade head 5; and the measuring device 2 is designed as a hemispherical structure.

[0027] Working principle of this utility model:

[0028] The utility model is mainly designed for a combined reamer, which is mainly composed of a rotary rod 1, a measuring device 2 and a handle 3.

[0029] The measuring device 2 is designed with structures such as a handle connection hole 9, a connection column 8, a reamer matching hole and an observation hole 10. The six handle connection holes 9 can be matched with one or more handles 3, which is convenient for selection during surgery. The connection column 8 can be matched with the measuring device connection hole 7 to make the axis of the rotary rod 1 and the measuring device 2 coincide with each other and accurately grind. The reamer matching hole is used to locate the position and size of the necrotic cartilage of the femoral head, and the circular contour is fitted according to the boundary of the necrotic cartilage, which is used as a reference for selecting the size of the measuring device 2 and the rotary blade head 5. The observation window 10 is used to check whether the spherical measurement contour is the same as the outer spherical diameter of the femoral head, which is used as a basis for selecting the inner spherical diameter of the measuring device.

[0030] The rotary rod 1 is designed with structures such as a power connection end 4, a measuring device connection hole 7, a rotary blade head 5, a rotary blade 6 and a fitting surface. The power connection end 4 can be connected to the surgical power to provide torque. The measuring device connection hole 7 cooperates with the rotary rod connection column to make the rotary rod and the measuring device axis coincide with each other for precise filing. The fitting surface can be attached to the plane on the matching hole of the measuring device reamer to limit the filing depth. The rotary blade head 5 is designed with different sizes and depths to file femoral heads with different ball diameters and depths. The surface of the rotary blade 6 is concave spherical, and the ball diameter size can be selected in real time in clinical practice;

[0031] The combined reamer is used to shape the necrotic or diseased spherical cartilage surface in the ball-to-acetabulum joint (for example: the cartilage layer of the femoral head).

[0032] A suitable measuring device 2 can be selected according to the outer diameter of the spherical cartilage, a suitable reamer matching hole can be selected according to the necrotic area, and a suitable measuring device reamer matching hole can be selected according to the contour of the necrotic area.

[0033] The height, outer diameter and molding profile of the rotary blade head 5 in the rotary rod 1 can be selected according to the intraoperative situation to accurately remove the area and thickness of necrotic cartilage, and the molded bone interface can be controlled to reduce damage to the femoral head.

[0034] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0035] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A combined reamer, comprising a rotary rod (1), a measuring device (2) and a handle (3), characterized in that: A measuring device (2) is installed below the rotary rod (1), a handle (3) is plugged into one side of the measuring device (2), a power connection end (4) is provided at the top end of the rotary rod (1), a rotary blade head (5) is provided at the bottom end of the rotary rod (1), a rotary blade (6) is provided on the lower surface of the rotary blade head (5), and a plurality of groups of measuring device connection holes (7) are provided on the rotary blade head (5).

2. The combined reamer according to claim 1, characterized in that: A plurality of groups of connection columns (8) are provided on the upper surface of the measuring device (2), and handle connection holes (9) are provided near the outer sides of the connection columns (8), wherein a plurality of groups of observation holes (10) are provided at equal intervals on the periphery of the measuring device (2).

3. The combined reamer according to claim 1, characterized in that: The outer periphery of the rotary blade head (5) is provided with a fitting surface, and the fitting surface is engaged with the upper plane of the measuring device (2).

4. The combined reamer according to claim 2, characterized in that: The connecting column (8) on the measuring device (2) is engaged and docked with the measuring device connecting hole (7) on the rotary blade head (5).

5. The combined reamer according to claim 1, characterized in that: The handle connection hole (9) on the measuring device (2) is threadedly connected to the end of the handle (3).

6. The combined reamer according to claim 1, characterized in that: The lower surface of the rotary blade head (5) is an arc-shaped structure.

7. The combined reamer according to claim 2, characterized in that: The connecting column (8) may be sleeved with a plurality of sets of gaskets, which are used to adjust the depth of the rotary blade head (5).

8. The combined reamer according to claim 1, characterized in that: The measuring device (2) is designed as a hemispherical structure.

9. The combined reamer according to claim 1, characterized in that: The power connection end (4) on the rotating rod (1) is connected to the surgical power.

Images