CN117752396A - Minimally invasive elastic intramedullary fixing device for pelvic fracture - Google Patents

Abstract

The invention provides a minimally invasive elastic intramedullary fixation device for pelvic fracture, and belongs to the technical field of pelvic fixation devices. The connecting device comprises a bottom bracket, wherein one side of the bottom bracket is sleeved with a transverse connecting block, a small spring, a connecting plate, a vertical connecting block, a connecting hole, a connecting ball, an upper thread plate, a lower thread plate, a connecting frame and an operation plate. According to the device, the connecting plate and the small spring are arranged to shrink so that the device is in a flexible state, the rubber tube is inserted into the center of the bottom support, after the rubber tube contacts the connecting plate, the connecting plate can move forwards to enter the transverse connecting block, and then the direction of the connecting plate is changed under the pushing of the rubber tube, so that the device is in a rigid state, after the rubber tube is pulled out, the connecting plate is reset through the small spring, and the device for minimally invasive elastic intramedullary fixation of pelvic fracture is used for controlling structures such as a frame, the rubber tube and the like through the tension spring, screws can be switched between flexibility and rigidity, and the screws are controlled to go in and go out through four air tubes.

Description

A minimally invasive elastic intramedullary fixation device for pelvic fractures

Technical field

The present invention relates to the technical field of pelvic fixation devices, and in particular to a minimally invasive elastic intramedullary fixation device for pelvic fractures.

Background technique

The pelvis is a pelvic-shaped skeleton that connects the spine and lower limbs. It is a complete bone ring connected by the sacrum and coccyx (the two lowest bones of the spine) at the rear and the left and right hip bones. Anatomically, the pelvis is composed of the hip bones on both sides and the sacrococcyx at the rear. The hip bone is an irregular bone, formed by the fusion of the upper ilium, the anterior and lower pubic bones, and the posterior and lower ischium. The upper part of the hip bone is flat and wide, the middle part is narrow and thick, the lower part has an obturator foramen, and the upper part of the posterolateral surface is flat and attached to the gluteal muscles. The ilium is composed of the iliac wing and the body of the iliac bone; the ischium is composed of the ischial ramus and the ischial body; the pubic bone is composed of the superior pubic ramus, the inferior pubic ramus and the pubic body. The pubic ramus is the thinnest and most susceptible to fractures. The hip bone forms the lateral wall and front wall of the pelvis, and the deep round socket in the middle is the acetabulum. According to the fracture characteristics, the pelvis can be divided into two parts: the pelvic ring and the acetabulum. The pelvic ring is bounded by the acetabulum and can be divided into anterior and posterior rings. The acetabulum is divided into an anterior column (i.e., iliac pubic column), a posterior column (i.e., iliac ischial column), and the acetabulum roof. Intramedullary fixation of pelvic fractures has become a popular new technology in the field of orthopedics in recent years because of its small trauma, good effect, and convenient secondary removal. With the development of intraoperative imaging technology and the advancement of surgical instruments, doctors can use special surgical instruments to perform intramedullary fixation of patients' pelvic fractures under the guidance of X-ray and CT to achieve better therapeutic effects. Internal pin fixation This is an operation in which medullary needles of appropriate size and length are inserted into the medullary cavities on both sides of the fractured end to fix the fracture. There are different types of intramedullary needles, such as "V" shape, plum blossom shape, triangle shape, etc. "V"-shaped, plum-shaped, and triangular intramedullary pins are suitable for long tubular bone fractures; three-wing nails are suitable for femoral neck fractures; Kirschner steel pins are commonly used for short bone fractures of hands and feet. Clinically, it is divided into closed intramedullary nail fixation and open intramedullary nail fixation.

Intramedullary nails are orthopedic internal fixation devices among medical devices. The structure has an intramedullary nail rod, a proximal locking screw hole is provided at the proximal end of the intramedullary nail rod, and a decompression plane is provided on the surface of the intramedullary nail rod. There is more than one elongated decompression plane on the surface of the intramedullary nail rod, and the decompression plane can extend from the proximal end of the intramedullary nail rod to the distal end of the intramedullary nail rod. The proximal end of the intramedullary nail rod is provided with a locking screw positioning screw hole and a connecting sleeve positioning groove.

In the case of pelvic fractures, due to the different locations of the fractures, the intramedullary nails need to be adjusted to different angles and depths, and due to the irregular shape of the pelvis, traditional intramedullary nails cannot achieve the required results. During the operation, it is necessary to control the entry direction of the intramedullary nail. Fixing the intramedullary nail can ensure that the fracture position can be better restored. Therefore, this application provides a minimally invasive elastic intramedullary fixation device for pelvic fractures to meet the needs. .

Contents of the invention

The technical problem to be solved by the present invention is to provide a minimally invasive elastic intramedullary fixation device for pelvic fractures to solve the existing problems that traditional intramedullary nails cannot be used and intramedullary nails are difficult to control for pelvic fractures.

In order to solve the above technical problems, the present invention provides the following technical solutions:

A minimally invasive elastic intramedullary fixation device for pelvic fractures, including a bottom bracket. One side of the bottom bracket is sleeved with a transverse connecting block. A small spring is engaged with the inside of the transverse connecting block. One side of the small spring A connecting plate is provided, a vertical connecting block is engaged with the other end of the connecting plate, a connecting hole is provided on one side of the vertical connecting block, a connecting ball is provided on one side of the vertical connecting block, and the The other end of the connecting ball is sleeved with an upper threaded plate, and the lower surface of the upper threaded plate is engaged with a lower threaded plate. A connecting frame is inserted into the inside of the bottom bracket, and an operating panel is provided on one side of the connecting frame. , a tension spring is engaged with the inside of the operation panel, an operating block is engaged with the other end of the tension spring, an extrusion spring is inserted into the upper surface of the operation panel, and the outer surface of the extrusion spring An extrusion block is connected to the extrusion block, and a fixing device is clamped on the other side of the operation panel. An air chamber is provided on one side of the fixing device.

Optionally, the number of the small springs is ten, and the number of the connecting plates is ten, and the small springs and the connecting plates are adapted to each other.

Optionally, the bottom of the upper threaded plate is provided with connecting posts, and the number of the connecting posts is four.

Optionally, the number of the fixing devices is four, and the number of the air chambers is two.

Optionally, an air hole is provided on one side of the air cavity, and a right trachea is inserted into one side of the air hole.

Optionally, a lower air pipe is inserted into the inside of the bottom bracket, an upper air pipe is inserted into the inside of the bottom bracket, and a left air pipe is inserted into the inside of the bottom bracket.

Optionally, a sealing tube is clamped inside the air chamber, and a control frame is provided on the upper surface of the sealing tube.

Optionally, a syringe is connected to one end of the operation panel, an extension pipe is connected to the outer surface of the syringe, an air bag is provided at one end of the extension pipe, and a rubber sleeve is connected to the outer surface of the extension pipe. Tube.

Optionally, a bottom fixing frame is connected to the outer surface of the extended pipe, a rotating shaft is inserted into the inside of the bottom fixing frame, an upper fixing frame is connected to the outer surface of the rotating shaft, and an upper fixing frame is connected to the inner part of the bottom fixing frame. The snap connection has a buckle.

Optionally, a baffle is clipped on one side of the bottom bracket.

A method of using a minimally invasive elastic intramedullary fixation device for pelvic fractures, including the following steps:

Step 1: First, carry out the normal surgical process, disinfect and sterilize the patient's skin, then cut the skin, align the pelvic fracture site, and then start drilling holes with drilling tools;

Step 2: Adjust the length of the screw according to the needs of the injured pelvic part of the patient. You can adjust the length of the screw by adding or reducing vertical connecting blocks or transverse connecting blocks. Then, connect the four tracheas of different parts to the two air chambers. The four air holes on one side are connected, and the connecting frame can be inserted into the inside of the bottom bracket for fixation;

Step 3. Next, you can insert the upper threaded plate and the lower threaded plate into the holes on the side of the pelvis. Due to the special shape of the pelvis, four control frames are needed to control four sealed tubes for four different tracheas. Internal pressurization or depressurization is performed respectively to control the direction and position of the upper and lower threaded plates, and to reduce the friction between the screws and the pelvis, allowing the surgery to proceed faster;

Step 4: Then insert the rubber tube and air bag into the inside of the bottom bracket. When the rubber tube enters the inside of the bottom bracket, it will squeeze the connecting plates on both sides, causing the connecting plates to move forward into the next part. When connected After the plate enters a certain distance, the connecting plate will lock the parts on both sides due to the extrusion of the rubber tube, allowing the device to enter a rigid state from a flexible state. After taking out the rubber tube, the connecting plate will return to its original position through a small spring and cancel. Lock and restore flexible state;

Step 5. When the airbag reaches the position between the upper threaded plate and the lower threaded plate, the airbag can be pressurized through the syringe to expand and separate the upper threaded plate and the lower threaded plate, thereby using the upper threaded plate and the lower threaded plate. The threads on the outer surface of the threaded plate increase friction and prevent the screws from falling out. Then, by merging the bottom fixing frame and the upper fixing frame, the upper fixing frame is clamped with a snap to prevent the gas inside the airbag from leaking out;

Step 6. Finally, when the screws are fixed, you can press and push the extrusion block and the operation block to separate the operation panel from the bottom bracket. The four air pipes are inserted into the inside of the bottom bracket, the syringe is pulled out, and the remaining extension pipes are also inserted. All operations can be completed by covering the inside of the bottom bracket with the baffle.

Compared with the prior art, the present invention at least has the following beneficial effects:

In the above scheme, the device is in a flexible state by setting a connecting plate and a small spring to shrink. The rubber tube is inserted into the center of the bottom bracket. When the rubber tube contacts the connecting plate, the connecting plate will move forward and enter the inside of the horizontal connecting block. The orientation of the connecting plate changes under the push of the rubber tube, causing the transverse connecting block and the bottom bracket to be in a locked state, so they are in a rigid state. After the rubber tube is pulled out, the connecting plate is reset by a small spring, thus returning to a flexible state. , you can use the flexible state when installing the screws. When the connecting frame enters the bottom bracket, the extrusion block fixes the bottom bracket through the extrusion spring, the operating block fixes the bottom bracket through the tension spring, and the extrusion block detaches from the bottom bracket by pressing , the operating block is squeezed inwards to separate from the bottom bracket, and the sealed tube is controlled through the control frame inside the air chamber. The four control frames control the gas inside the trachea in four directions respectively, and the direction of the screw is adjusted through the different air pressures of the four tracheas. After entering the deepest part of the pelvis, insert the air bag into the inside of the bottom bracket, and the rubber tube squeezes the connecting plate. When the air bag enters the deepest part, the air bag can be inflated into the inside of the air bag through the syringe. The expansion of the air bag will cause the most severe pain. The upper and lower threaded plates at the top are pushed open. The upper and lower threaded plates will be firmly fixed at the deepest part of the pelvis through the threads on their surfaces. After the air bag is inflated, the upper part can be fixed. The frame cover is placed on the upper surface of the bottom fixed frame, and then the buckle is slid to ensure that the gas inside the airbag will not leak. When the screws are fixed, the operating panel can be removed through the operating block and extrusion block, and the four air tubes are stuffed into the bottom bracket, and then cover the surface of the bottom bracket with a baffle to ensure that the internal parts will not fall out. Subsequent disassembly requires releasing the gas inside the airbag first, and then taking out the parts step by step and passing them through four wires. Just twist out the air pipe control screws in different directions.

Through structures such as tension springs, control frames and rubber tubes, the use effect of the equipment is greatly enhanced. It not only ensures that the screw can switch between flexibility and rigidity, but also controls the entry and exit of the screw through four air pipes, reducing Unexpected damage to the internal structure of the pelvis reduces the difficulty of the operation, greatly reduces the operation time due to irregular pelvic fractures, and reduces the surgical burden on the doctor.

In summary, the present invention has the flexibility and rigidity that traditional intramedullary nails do not have, reduces the tedious steps of surgery, and ensures that patients can recover quickly.

Description of the drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and, together with the description, further serve to explain the principles of the disclosure and enable any person skilled in the relevant art to make and use the disclosure.

Figure 1 is a schematic diagram of the three-dimensional structure of a minimally invasive elastic intramedullary fixation device for pelvic fractures;

Figure 2 is a schematic diagram of the exploded structure of the surface parts of the bottom bracket of the minimally invasive elastic intramedullary fixation device for pelvic fractures;

Figure 3 is a schematic diagram of the exploded structure of the internal parts of the bottom bracket of the minimally invasive elastic intramedullary fixation device for pelvic fractures;

Figure 4 is a schematic diagram of the exploded structure of the surface parts of the operating plate of the minimally invasive elastic intramedullary fixation device for pelvic fractures;

Figure 5 is a schematic diagram of the exploded structure of the connection of parts near the extension tube of the minimally invasive elastic intramedullary fixation device for pelvic fractures;

Figure 6 is a schematic diagram of the exploded structure of the overall connection of the minimally invasive elastic intramedullary fixation device for pelvic fractures;

Figure 7 is a schematic diagram of the planar structure of the minimally invasive elastic intramedullary fixation device for pelvic fractures.

[reference mark]

1. Bottom bracket; 2. Horizontal connecting block; 3. Small spring; 4. Connecting plate; 5. Vertical connecting block; 6. Connecting hole; 7. Connecting ball; 8. Upper threaded plate; 9. Lower threaded plate; 10. Connecting frame; 11. Operating panel; 12. Tension spring; 13. Operating block; 14. Extrusion spring; 15. Extrusion block; 16. Fixing device; 17. Air chamber; 18. Air hole; 19. Right Side trachea; 20, lower trachea; 21, upper trachea; 22, left trachea; 23, sealing tube; 24, control frame; 25, syringe; 26, extension pipe; 27, air bag; 28, rubber tube; 29. Bottom fixed frame; 30. Rotating shaft; 31. Upper fixed frame; 32. Buckle; 33. Baffle.

As shown in the figures, in order to clearly realize the structure of the embodiments of the present invention, specific structures and devices are marked in the figures, but this is only for illustration and is not intended to limit the present invention to the specific structures, devices and environments. , according to specific needs, those of ordinary skill in the art can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the appended claims.

Detailed ways

A minimally invasive elastic intramedullary fixation device for pelvic fractures provided by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative ways to implement them; and the drawings It is only for the purpose of describing the embodiments more specifically, and is not intended to specifically limit the present invention.

It should be noted that references in the specification to "one embodiment", "an embodiment", "exemplary embodiments", "some embodiments", etc. indicate that the described embodiments may include specific features, structures or characteristics, but Not every embodiment may include the particular feature, structure or characteristic. Additionally, when a particular feature, structure or characteristic is described in connection with an embodiment, it should be within the knowledge of a person skilled in the relevant art to implement such feature, structure or characteristic in conjunction with other embodiments (whether explicitly described or not).

Often, a term can be understood, at least in part, from its usage in context. For example, the term "one or more" as used herein may be used to describe any feature, structure or characteristic in the singular, or may be used to describe a combination of features, structures or characteristics in the plural, depending at least in part on context. Additionally, the term "based on" may be understood as not necessarily intended to convey an exclusive set of factors, but may instead, depending at least in part on context, allow for the presence of other factors that are not necessarily explicitly described.

It will be understood that the meanings of "on," "over," and "over" in this disclosure should be interpreted in the broadest manner, such that "on" means not only "Directly on" something but also "on" something with intervening features or layers in between, and "on" or "over" not only means "on" something "on" or "above" and may also include the meaning of "on" or "above" something without intervening features or layers.

In addition, spatially relative terms such as “under,” “below,” “lower,” “above,” “upper,” and the like may be used herein to describe the relationship between one element or feature and another for convenience of description. The relationship of one or more elements or features as illustrated in the drawings. The spatially relative terms are intended to cover different orientations in use or operation of the device in addition to the orientation depicted in the figures. The device may be otherwise oriented and the spatially relative descriptors used herein interpreted accordingly.

As shown in Figures 1, 2 and 7, an embodiment of the present invention provides a minimally invasive elastic intramedullary fixation device for pelvic fractures, which includes a bottom bracket 1. One side of the bottom bracket 1 is sleeved with a transverse connecting block. 2. A small spring 3 is clamped inside the horizontal connecting block 2. One side of the small spring 3 is provided with a connecting plate 4. The other end of the connecting plate 4 is clamped with a vertical connecting block 5. One side of the vertical connecting block 5 A connecting hole 6 is provided. One side of the vertical connecting block 5 is provided with a connecting ball 7. The other end of the connecting ball 7 is sleeved with an upper threaded plate 8. The lower surface of the upper threaded plate 8 is engaged with a lower threaded plate 9. The bottom A connecting frame 10 is plugged into the interior of the bracket 1. The extension spring (tension spring) is a spiral spring that bears axial tension. The extension spring is generally made of circular cross-section material. When not bearing the load, the coils of the extension spring are The rings are generally tight and have no gaps. They use the elasticity (tension) after stretching to control the movement of parts, store energy, measure force, etc. They are widely used in machines and instruments. The hook types include side hook extension spring, long hook extension spring, British hook extension spring, German hook extension spring, semicircle hook extension spring, duckbill hook extension spring, etc. Its materials include stainless steel, piano steel, high carbon Steel, phosphor bronze, beryllium copper, oil tempered alloy spring steel, etc.

During use, the length of the screw needs to be determined according to the patient's injury. The screw can be lengthened or shortened as needed. Each structure of the screw is connected through the connecting ball 7 and the connecting hole 6. When needed During flexible operation, the connecting plate 4 and the small spring 3 are in a contracted state. When a rigid structure is required, the rubber tube 28 can be inserted into the center of the bottom bracket 1. When the rubber tube 28 contacts the connecting plate 4, the connection will be made. The plate 4 moves forward into the interior of the transverse connecting block 2, and is pushed by the rubber tube 28 to change the orientation of the connecting plate 4, causing the transverse connecting block 2 and the bottom bracket 1 to be in a locked state, and only the rubber tube 28 can be removed. After 28 is pulled out, the connecting plate 4 will return to its original position through the small spring 3, thereby returning to the flexible state. The flexible state can be used when installing screws, and the rigid state can be restarted when it needs to be fixed. The upper threaded plate 8 and the lower threaded plate 9 The threads on the surface allow for better passage of the fixing screw.

As shown in Figures 3 and 4, an operating panel 11 is provided on one side of the connecting frame 10. A tension spring 12 is engaged inside the operating panel 11, and an operating block 13 is engaged at the other end of the tension spring 12. An extrusion spring 14 is inserted into the upper surface of the operation panel 11, and an extrusion block 15 is connected to the outer surface of the extrusion spring 14. A fixing device 16 is engaged with the other side of the operation panel 11, and is provided on one side of the fixing device 16. There is an air chamber 17, the number of small springs 3 is ten, and the number of connecting plates 4 is ten. The small springs 3 and the connecting plates 4 are adapted to each other. The bottom of the upper threaded plate 8 is provided with connecting columns, and the number of connecting columns is Fourth, the number of fixing devices 16 is four, and the number of air chambers 17 is two. One side of the air chamber 17 is provided with an air hole 18. One side of the air hole 18 is plugged with the right air pipe 19, and the inside of the bottom bracket 1 is plugged with The lower air pipe 20 is inserted into the upper air pipe 21 inside the bottom bracket 1. The left air pipe 22 is inserted into the inside of the bottom bracket 1. A sealing tube 23 is engaged inside the air chamber 17. The upper surface of the sealing tube 23 is provided with There is a control frame 24. The compression spring (compression spring) is a coil spring that bears axial pressure. The spring is generally divided into an equal pitch spring and a variable pitch spring. The shapes of the compression spring are: cylindrical, conical, medium convex and medium. Concave shape and a small amount of non-circular shape, etc., there is a certain gap between the coils of the compression spring. When subjected to external load, the spring shrinks and deforms, storing deformation energy. Variable pitch springs are becoming more and more common, and they are no longer just equal pitches. Pitch springs and variable pitch springs can play different roles in different environments.

After entering the inside of the bottom bracket 1 through the connecting frame 10, the extrusion blocks 15 on the upper and lower sides will fix the bottom bracket 1 through the extrusion springs 14, while the operating blocks 13 on both sides will fix the bottom bracket through the tension springs 12. 1. The extrusion block 15 can be detached from the bottom bracket 1 by pressing it, while the operating blocks 13 on both sides need to be squeezed inward to detach from the bottom bracket 1. The sealing tube 23 is controlled through the control frame 24 inside the air chamber 17, four The control frame 24 controls the gas inside the trachea in four directions respectively, and adjusts the direction of the screw through the different air pressures of the four tracheas, thereby making it easier for the screw to enter the depth of the pelvis and reducing the possibility of jamming the main screw under special circumstances.

As shown in Figures 5 and 6, a syringe 25 is engaged with one end of the operation panel 11, and an extension pipe 26 is connected to the outer surface of the syringe 25. An air bag 27 is provided at one end of the extension pipe 26. A rubber tube 28 is connected to the outer surface, and a bottom fixing frame 29 is connected to the outer surface of the extension pipe 26. A rotating shaft 30 is inserted into the bottom fixing frame 29, and an upper fixing frame 31 is connected to the outer surface of the rotating shaft 30. The bottom fixed frame 29 is connected to the outer surface of the extending pipe 26. A buckle 32 is engaged with the interior of the frame 29, and a baffle 33 is engaged with one side of the bottom bracket 1. Medical hoses can be divided into two types: external use and internal use. The former is used for transporting various gases and liquids, such as stethoscopes. Rubber hoses, infusion hoses, etc.; the latter are commonly known as medical rubber catheters, which can be divided into single-lumen tubes and multi-lumen tubes according to their structures. Single-lumen tubes have only one inner lumen, while multi-lumen tubes are used for medical and surgical operations and have more than two inner lumens. (such as double-lumen hemostatic catheters, double-balloon three-lumen tubes, etc.). Multi-lumen catheters are equipped with one or two latex balloons to seal or compress. Rubber catheters are rubber tubes inserted into human body cavities and blood vessels. When injecting drugs or withdrawing fluids from the body and determining the degree of opening of the lumen, medical hoses must have a smooth surface, be non-toxic, odorless, and resistant to disinfection. In particular, hoses used in the body must be free of harmful soluble substances (such as lead, cadmium, arsenic). etc.), medical hoses are generally produced by extrusion molding, direct steam vulcanization or molding.

During use, when the screw enters the deepest part of the pelvis, the air bag 27 can be inserted into the inside of the bottom bracket 1, and the rubber tube 28 squeezes the connecting plate 4. When the air bag 27 enters the deepest part, the air bag 27 can be inserted through the needle. The cylinder 25 inflates gas into the interior of the airbag 27. The expansion of the airbag 27 will cause the uppermost threaded plate 8 and the lower threaded plate 9 to be pushed open. The thread is firmly fixed in the deepest part of the pelvis. After the air bag 27 is inflated, the upper fixing frame 31 can be covered on the upper surface of the bottom fixing frame 29, and then the buckle 32 can be slid to ensure that the gas inside the air bag 27 will not leak. , when the screws are fixed, the operating panel 11 can be removed through the operating block 13 and the extrusion block 15, the four air pipes are inserted into the bottom bracket 1, and then the baffle 33 is used to cover the surface of the bottom bracket 1 to ensure that the internal parts It will not fall out. Subsequent disassembly requires releasing the gas inside the air bag 27 first, then taking out the parts step by step, and twisting them out through four air pipe control screws in different directions.

The technical solution provided by the present invention makes the equipment in a flexible state through the contraction of the connecting plate and the small spring. The rubber tube is inserted into the center of the bottom bracket. When the rubber tube contacts the connecting plate, the connecting plate will be moved forward into the transverse connecting block. Inside, the orientation of the connecting plate changes under the push of the rubber tube, causing the transverse connecting block and the bottom bracket to be in a locked state, so they are in a rigid state. After the rubber tube is pulled out, the connecting plate is reset by a small spring, thus changing back to The flexible state can be used when installing screws. When the connecting frame enters the inside of the bottom bracket, the extrusion block fixes the bottom bracket through the extrusion spring, the operating block fixes the bottom bracket through the tension spring, and the extrusion block is pressed to release The bottom bracket, the operating block is squeezed inwards to separate from the bottom bracket, and the sealing tube is controlled through the control frame inside the air chamber.

The four control frames control the gas inside the trachea in four directions respectively, and adjust the direction of the screw through the different air pressures of the four tracheas. After the screw enters the deepest part of the pelvis, the air bag is inserted into the inside of the bottom bracket, and the rubber tube is squeezed. Press the connecting plate. When the air bag enters the deepest part, you can inflate gas into the interior of the air bag through the syringe. The expansion of the air bag will cause the upper and lower threaded plates at the top to be pushed open. After the upper threaded plate is pushed open, and the lower threaded plate will be firmly fixed in the deepest part of the pelvis through the threads on its surface. After the air bag is inflated, the upper fixing frame can be covered on the upper surface of the bottom fixing frame, and then the buckle can be slid to ensure that the inside of the air bag is The gas will not leak. When the screws are fixed, the operating panel can be removed through the operating block and the extrusion block. The four air pipes are inserted into the bottom bracket, and then the surface of the bottom bracket is covered with a baffle to ensure that the internal parts will not If it falls out, subsequent disassembly requires releasing the gas inside the airbag first, then taking out the parts step by step, and twisting them out through the four air pipe control screws in different directions, through the tension spring, control frame and rubber tube and other structures, which greatly enhances the use effect of the equipment. It not only ensures that the screw can be switched between flexibility and rigidity, but also controls the entry and exit of the screw through the four tracheas, reducing accidental damage to the internal structure of the pelvis and reducing The difficulty of the operation greatly reduces the operation time for irregular pelvic fractures and reduces the surgical burden on doctors.

The present invention covers any alternatives, modifications, equivalent methods and solutions within the spirit and scope of the invention. In order to provide the public with a thorough understanding of the present invention, specific details are described in the following preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. In addition, well-known methods, processes, flows, components, circuits, etc. have not been described in detail in order to avoid unnecessary confusion.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be made. regarded as the protection scope of the present invention.

Claims (10)

1. A minimally invasive elastic intramedullary fixation device for pelvic fractures, characterized in that it includes: a bottom bracket, one side of the bottom bracket is sleeved with a transverse connecting block, and a small spring is engaged with the inside of the transverse connecting block, One side of the small spring is provided with a connecting plate, and the other end of the connecting plate is engaged with a vertical connecting block. One side of the vertical connecting block is provided with a connecting hole. One side of the vertical connecting block Equipped with connecting ball; The other end of the connecting ball is sleeved with an upper threaded plate, and the lower surface of the upper threaded plate is engaged with a lower threaded plate. A connecting frame is inserted into the inside of the bottom bracket, and one side of the connecting frame is provided with An operating panel, a tension spring is engaged with the interior of the operating panel, and an operating block is engaged with the other end of the tension spring; An extrusion spring is inserted into the upper surface of the operation plate, and an extrusion block is connected to the outer surface of the extrusion spring. A fixing device is engaged with the other side of the operation plate. One side of the fixing device Equipped with air chamber. 2. The minimally invasive elastic intramedullary fixation device for pelvic fracture according to claim 1, characterized in that the number of the small springs is ten, the number of the connecting plates is ten, and there is a gap between the small springs and the connecting plates. Adapt to each other. 3. The minimally invasive elastic intramedullary fixation device for pelvic fractures according to claim 1, characterized in that connecting columns are provided at the bottom of the upper threaded plate, and the number of the connecting columns is four. 4. The minimally invasive elastic intramedullary fixation device for pelvic fractures according to claim 1, wherein the number of the fixation devices is four and the number of the air cavities is two. 5. The minimally invasive elastic intramedullary fixation device for pelvic fractures according to claim 1, characterized in that a stoma is provided on one side of the air cavity, and a right trachea is inserted into one side of the stoma. 6. The minimally invasive elastic intramedullary fixation device for pelvic fractures according to claim 1, characterized in that a lower trachea is inserted into the interior of the bottom bracket, and an upper trachea is inserted into the interior of the bottom bracket, so The left air pipe is inserted into the inside of the bottom bracket. 7. The minimally invasive elastic intramedullary fixation device for pelvic fractures according to claim 1, characterized in that a sealing tube is clamped inside the air cavity, and a control frame is provided on the upper surface of the sealing tube. 8. The minimally invasive elastic intramedullary fixation device for pelvic fractures according to claim 1, wherein a syringe is engaged with one end of the operating plate, and an extension pipe is connected to the outer surface of the syringe. An air bag is provided at one end of the extension pipe, and a rubber tube is sleeved on the outer surface of the extension pipe. 9. The minimally invasive elastic intramedullary fixation device for pelvic fractures according to claim 1, characterized in that the outer surface of the extension pipe is sleeved with a bottom fixation frame, and a rotating shaft is inserted into the inside of the bottom fixation frame, so An upper fixing frame is connected to the outer surface of the rotating shaft, and a buckle is connected to the inside of the bottom fixing frame. 10. The minimally invasive elastic intramedullary fixation device for pelvic fractures according to claim 1, wherein a baffle is engaged with one side of the bottom bracket.