阅读说明：本技术 一种长骨固定装置及固定方法 (Long bone fixing device and fixing method ) 是由 王炳强 康伟伟 孙之建 于 2021-01-19 设计创作，主要内容包括：本发明涉及一种长骨固定装置及固定方法,其解决了现有股骨手术在定位前不能正确、稳定复位的技术问题,其包括连接侧板一、连接侧板二、固定套筒一、固定套筒二、固定板、固定针一、固定针二、固定套筒三、固定套筒四、固定针三、固定针四,连接侧板一设有第一螺纹孔、第二螺纹孔,连接侧板二上设有第一螺纹孔、第二螺纹孔；固定套筒一设有外螺纹,固定套筒一的外螺纹与连接侧板一的第一螺纹孔连接配合；固定套筒二设有外螺,固定套筒二的后端设有外六角形端部；固定套筒三设有外螺纹和外六角形端部,所述固定套筒四设有外螺纹和外六角形端部；连接侧板一设有髓内钉锁钉专用孔,所述连接侧板二设有髓内钉锁钉专用孔。本发明广泛用于骨科手术。(The invention relates to a long bone fixing device and a fixing method, which solve the technical problem that the existing femoral operation cannot be correctly and stably reset before positioning, and comprise a first connecting side plate, a second connecting side plate, a first fixing sleeve, a second fixing sleeve, a fixing plate, a first fixing needle, a second fixing needle, a third fixing sleeve, a fourth fixing sleeve, a third fixing needle and a fourth fixing needle, wherein the first connecting side plate is provided with a first threaded hole and a second threaded hole; the first fixing sleeve is provided with an external thread, and the external thread of the first fixing sleeve is connected and matched with the first threaded hole of the first connecting side plate; the second fixing sleeve is provided with an outer screw, and the rear end of the second fixing sleeve is provided with an outer hexagonal end part; the third fixed sleeve is provided with an external thread and an external hexagonal end part, and the fourth fixed sleeve is provided with an external thread and an external hexagonal end part; the first connecting side plate is provided with a special hole for an intramedullary nail locking nail, and the second connecting side plate is provided with a special hole for the intramedullary nail locking nail. The invention is widely used for orthopedic surgery.)

1. A long bone fixing device is characterized by comprising a first connecting side plate, a second connecting side plate, a first fixing sleeve, a second fixing sleeve, a fixing plate, a first fixing needle, a second fixing needle, a third fixing sleeve, a fourth fixing sleeve, a third fixing needle and a fourth fixing needle,

the first connecting side plate is provided with a first threaded hole and a second threaded hole, and the second connecting side plate is provided with a first threaded hole and a second threaded hole;

the rear end of the first fixing sleeve is provided with an outer hexagonal end part, the first fixing sleeve is provided with an external thread, and the external thread of the first fixing sleeve is connected and matched with the first threaded hole of the first connecting side plate;

the second fixing sleeve is provided with external threads, and the rear end of the second fixing sleeve is provided with an outer hexagonal end part; the fixing sleeve III is provided with an external thread and an external hexagonal end part, and the fixing sleeve IV is provided with an external thread and an external hexagonal end part;

the first connecting side plate is provided with a special hole for an intramedullary nail locking nail, and the second connecting side plate is provided with a special hole for an intramedullary nail locking nail.

2. The long bone fixation device of claim 1, wherein the front end of the first fixation sleeve has rounded corners and the front end of the second fixation sleeve has rounded corners.

3. The long bone fixation device of claim 1, wherein the first threaded hole on the first connection side plate is offset by 7-10 ° from the second threaded hole by 100-200 mm.

4. A fixation method using the long bone fixation device of claim 1, comprising the steps of:

the first step is as follows: placing the leg of the patient between the first connecting side plate and the second connecting side plate;

the second step is that: after the distal end of the femur is clamped by the first fixing sleeve, the second fixing sleeve, the third fixing sleeve and the fourth fixing sleeve, the first fixing needle, the second fixing needle, the third fixing needle and the fourth fixing needle are respectively driven into the first fixing sleeve, the second fixing needle, the third fixing needle and the fourth fixing sleeve to fix the distal end of the femur in one step.

Technical Field

The invention relates to the technical field of reduction robots for orthopedic operations, in particular to a long bone fixing device and a fixing method.

Background

In the technical field of orthopedics, in the operation process of leg bone fracture reduction, a magnetic navigation system can be utilized to carry out three-dimensional reconstruction on a CT or MRI two-dimensional image of a leg bone, a three-dimensional model of the leg bone is established, the leg bone is positioned by utilizing a probe and a six-degree-of-freedom reference tool, the association between the leg bone and the three-dimensional model is completed, when the leg bone moves, the three-dimensional model also moves relatively, and the reduction condition of the leg bone can be embodied by observing the reduction condition of the three-dimensional model of the leg bone, so that the reduction of the leg bone fracture is completed.

Magnetic navigation system can significantly reduce complicated bone surgery's risk, bone surgery utilizes navigation system to formulate operation plan and intraoperative navigation before the art, can track the surgical instruments in the operation process to with the image of surgical instruments position before the patient or in the art update in real time and show, let the operation doctor know the relation of surgical instruments's position and sick anatomical structure at any time, obtain the navigation help again simultaneously, so make the process of operation more accurate.

Referring to the invention patent No. 201310700436.7, a magnetic navigation system is disclosed. Referring to the invention application with patent number 201711112547.0, an orthopedic positioning robot base for magnetic navigation systems is disclosed. Refer to patent application No. 201910468654.X, which discloses a fixing support for assisting fracture reduction based on electromagnetic navigation technology. Reference is made to patent application No. 201711112548 entitled navigation reference. Reference is made to patent application No. 201711113196.5 entitled orthopaedic robot.

In the existing femur fracture operation, a kirschner wire is threaded at an ankle joint to manually draw the fracture until the fracture is completely fixed. The whole time lasts 20 minutes, and 30 minutes are different. It is necessary to consume a great deal of physical strength of the doctor. The doctor is also exposed to X-rays during radiography. Because manual traction is adopted, the reset is unstable, and the reset position is difficult to maintain and easy to change.

In the femoral fracture operation performed by using the bone surgery reduction robot, the femur needs to be fixed, and obviously, nailing and traction at the ankle joint are not practical. There is therefore a need to develop a device that can completely fixate the femur.

Disclosure of Invention

The invention provides a long bone fixing device and a fixing method, aiming at solving the technical problem that the existing femur operation can not be correctly and stably reset before positioning.

The invention provides a long bone fixing device, which comprises a first connecting side plate, a second connecting side plate, a first fixing sleeve, a second fixing sleeve, a fixing plate, a first fixing needle, a second fixing needle, a third fixing sleeve, a fourth fixing sleeve, a third fixing needle and a fourth fixing needle,

the first connecting side plate is provided with a first threaded hole and a second threaded hole, and the second connecting side plate is provided with a first threaded hole and a second threaded hole;

the rear end of the first fixing sleeve is provided with an outer hexagonal end part, the first fixing sleeve is provided with an external thread, and the external thread of the first fixing sleeve is connected and matched with the first threaded hole of the first connecting side plate;

the second fixing sleeve is provided with external threads, and the rear end of the second fixing sleeve is provided with an outer hexagonal end part; the third fixed sleeve is provided with an external thread and an external hexagonal end part, and the fourth fixed sleeve is provided with an external thread and an external hexagonal end part;

the first connecting side plate is provided with a special hole for an intramedullary nail locking nail, and the second connecting side plate is provided with a special hole for the intramedullary nail locking nail.

The present invention also provides a fixation method using the long bone fixation device, comprising the steps of:

the first step is as follows: placing the leg of the patient between the first connecting side plate and the second connecting side plate;

the second step is that: after the distal end of the femur is clamped by the first fixing sleeve, the second fixing sleeve, the third fixing sleeve and the fourth fixing sleeve, the first fixing needle, the second fixing needle, the third fixing needle and the fourth fixing needle are respectively driven into the first fixing sleeve, the second fixing needle, the third fixing needle and the fourth fixing sleeve to fix the distal end of the femur in one step.

The invention has the beneficial effect that rigid fixation is carried out on the distal condyle of the femur and the peripheral bone. The invention can rigidly fix the thighbone, has good stability and high reliability, and is a good basic research for carrying out the robot operation on the thighbone. By researching the configurations of the first connecting side plate and the second connecting side plate, the X-ray perspective area is increased while the femur can be fixed to the maximum extent. Meanwhile, the lengths of the first sleeve and the second sleeve and the first fixing needle and the second fixing needle are determined according to the common size of the femur. While ensuring that there is sufficient length to secure the femur. The interference to the doctor is reduced. The space which can be operated by the doctor is enlarged.

Further features of the invention will be apparent from the description of the embodiments which follows.

Drawings

FIG. 1 is a schematic structural view of a long bone fixation device;

FIG. 2 is an exploded view of the long bone fixation device of FIG. 1;

FIG. 3 is a structural schematic diagram of a first fixing sleeve;

FIG. 4 is an enlarged partial view of a corner of a first retaining sleeve;

fig. 5 is a schematic view showing the position of the X-ray fluoroscopy area.

The symbols in the drawings illustrate that:

1. the connecting side plate I, the connecting side plate II, the fixing sleeve I, the fixing sleeve II, the fixing plate 5, the fixing needle I, the fixing needle II, the fixing sleeve III, the fixing sleeve IV, the fixing needle III, the fixing needle IV and the fixing needle IV are connected through the connecting side plate I, the connecting side plate II, the fixing sleeve IV, the fixing sleeve II, the fixing plate II and the fixing needle.

Detailed Description

The present invention will be described in further detail below with reference to specific embodiments thereof with reference to the attached drawings.

As shown in fig. 1 to 3, the long bone fixing device includes a first connecting side plate 1, a second connecting side plate 2, a first fixing sleeve 3, a second fixing sleeve 4, a fixing plate 5, a first fixing pin 6, a second fixing pin 7, a third fixing sleeve 8, a fourth fixing sleeve 9, a third fixing pin 10, and a fourth fixing pin 11.

The first connecting side plate 1 is provided with a first threaded hole 102 and a second threaded hole 101. The second threaded hole 101 is used to secure the condyle, which is preferably defined. Much time is spent in designing the first threaded hole 102, some of which is used to look through various literature to be able to determine how to avoid blood vessels and nerves near the condyle, some of which is done with extensive bone modeling trials. A large amount of human bone experimental data are analyzed to obtain that the distance between the first threaded hole 102 and the second threaded hole 101 is 100-200 mm, and the deviation is 7-10 degrees, so that the femur can be fixed well while the operation is met. In order to perform the operation on the left femur and the right femur, a first threaded hole 202 and a second threaded hole 201 are also formed in the corresponding connecting side plate 2, the first threaded hole 202 and the first threaded hole 102 are coaxial, and the second threaded hole 201 and the second threaded hole 101 are coaxial.

The rear end of the first fixing sleeve 3 is provided with an external hexagonal end part 301 which can play a role of fixing by using a spanner to apply force. The first fixing sleeve 3 is provided with an external thread 302, and the external thread 302 and the thread on the first threaded hole 102 can be matched for use and can be screwed in so that the first fixing sleeve 3 can clamp the femur. In order to prevent damage to the tissues and the femur during rotation of the first fixing sleeve 3, the front end of the first fixing sleeve is provided with a rounded corner 303 (shown in fig. 3 and 4), so that damage to the tissues and the femur can be reduced to the greatest extent.

Similarly, the second fixing sleeve 4 has the same structure as the first fixing sleeve 3. The second fixing sleeve 4 is provided with external threads (the external threads are connected with the second threaded hole 101 in a matched mode), the front end of the second fixing sleeve 4 is provided with a fillet, and the rear end of the second fixing sleeve 4 is provided with an outer hexagonal end portion. The structure of three fixed sleeves 8, four fixed sleeves 9 is the same as fixed sleeve 3, three fixed sleeves 8 are provided with external threads (the external threads are connected and matched with the first threaded hole 202), the front ends of three fixed sleeves 8 are provided with round corners, and the rear ends of three fixed sleeves 8 are provided with outer hexagonal end parts. The fourth fixed sleeve 9 is provided with external threads (the external threads are connected with the second threaded hole 201 in a matched mode), the front end of the fourth fixed sleeve 9 is provided with a fillet, and the rear end of the fourth fixed sleeve 9 is provided with an outer hexagonal end portion.

After the distal end of the femur is clamped by the first fixing sleeve 3 and the second fixing sleeve 4, the first fixing needle 6 and the second fixing needle 7 can be driven in respectively to fix the distal end of the femur in one step. The first fixing needle 6 penetrates through the first fixing sleeve 3, and the second fixing needle 7 penetrates through the second fixing sleeve 4. Similarly, the third fixing pin 10 penetrates through the third fixing sleeve 8, and the fourth fixing pin 11 penetrates through the fourth fixing sleeve 9.

The connecting side plate 1 is provided with an intramedullary nail locking special hole 103, and the position and the size of the hole are also determined according to different sizes of intramedullary nails which are currently arranged on the market and penetrate into thighbones with corresponding lengths. The connecting side plate two 2 is also provided with an intramedullary nail locking special hole 203.

The whole set of device is connected with the robot through a fixing plate 5.

As shown in fig. 5, the first connecting side plate 1 is provided with a fluoroscopy region (a portion within a dotted line frame), and the second connecting side plate 2 is also provided with a fluoroscopy region.

During the operation, the leg of the patient is placed between the first connecting side plate and the second connecting side plate; and then, after the distal end of the femur is clamped by the first fixing sleeve, the second fixing sleeve, the third fixing sleeve and the fourth fixing sleeve, the first fixing needle, the second fixing needle, the third fixing needle and the fourth fixing needle are respectively driven into the first fixing sleeve, the second fixing needle, the third fixing needle and the fourth fixing sleeve to fix the distal end of the femur in one step.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art should be informed by the teachings of the present invention, other configurations of the components, the driving device and the connection means, which are similar to the technical solution and are not designed creatively, shall fall within the protection scope of the present invention without departing from the inventive spirit of the present invention.