Modularized pelvis fixator

Abstract

The utility model discloses a modularized pelvis fixator, relates to the technical field of medical instruments, and solves the problem that secondary injury is caused to a patient due to the fact that a connecting rod and a bone traction needle possibly interfere with each other when the number of operation parts is too large in the prior art. The main mounting seat is arranged on the outer trapezoidal supporting frame and used for mounting and locking the connecting rod, more straight line sections can be conveniently connected with the locking block through the outer trapezoidal supporting frame, meanwhile, the trapezoidal structure avoids shielding of an operation space in an operation, and better applicability is achieved; the outer trapezoid supporting frame has the advantages that the fixing rod scheme combination is more visual and convenient, meanwhile, the straight line section and the locking block can be connected more stably, the problem of unstable connection of the arc section is avoided, the inner rectangular supporting frame is adopted on the inner side, the inner operable space is larger, and operation in the operation is facilitated.

Description

Technical Field

[0001] This utility model relates to the technical field of medical devices, and in particular to a modular pelvic fixator. Background Technology

[0002] The pelvis is an important part of the human skeleton, containing vital organs and important blood vessels and nerves that control the lower limbs. With the development of industries such as construction and transportation, traffic accidents and other personal injury accidents occur frequently in daily life. Among them, the number of patients with multiple injuries and complex injuries, including pelvic and acetabular fractures, is increasing year by year. Pelvic fracture is a serious trauma. Pelvic fractures are often accompanied by damage to pelvic organs, blood vessels, and nerves. If not treated in time, it can seriously endanger the patient's life. The traditional treatment method is to openly reduce the fracture site. Although this method allows direct observation of the injured area, the surgical approach for pelvic fractures requires a large incision and extensive soft tissue dissection, which increases the risk of damage to important blood vessels and nerves, as well as the risk of incision infection. At the same time, it can also cause a lot of bleeding during the treatment process, which can seriously endanger the patient's life and health in severe cases.

[0003] Existing fixation devices can only connect the connecting rod and the bone traction pin through connectors (such as rod clamps, pin clamps, etc.). When there are too many operating areas, interference may occur between the connecting rod and the bone traction pin, affecting the doctor's operation and causing secondary injury to the patient. Utility Model Content

[0004] To address the existing problem that interference between the connecting rod and the traction pin may occur when there are too many operating points, causing secondary injury to the patient, the purpose of this utility model is to provide a modular pelvic fixation device. By setting a main mounting base on the pelvic fixation bracket, the use of rod clamps and pin clamps is reduced, providing better support performance, while avoiding mutual interference between the connecting rod and the traction pin.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A modular pelvic fixation device includes: at least one pelvic fixation bracket 1, multiple pelvic fixation brackets 1 detachably mounted on the side of a bed 8, and the pelvic fixation brackets 1 being used to mount connecting rods 2 and bone traction pins 5.

[0007] Each pelvic fixation bracket 1 includes: an inner rectangular support frame 11, an outer trapezoidal support frame 12, and a bottom U-shaped support frame 13. The inner rectangular support frame 11 includes: a top side rod, a bottom side rod, a left side rod, and a right side rod. The upper ends of the left side rod and the right side rod are respectively connected to the left and right ends of the top side rod, and the lower ends of the left side rod and the right side rod are respectively connected to the left and right ends of the bottom side rod. The two ends of the bottom side rod of the inner rectangular support frame 11 are respectively connected to a bottom U-shaped support frame 13. The outer trapezoidal support frame 12 includes: an upper horizontal rod 121, a long diagonal rod 122, and a short diagonal rod 123. The middle part of the short diagonal rod 123 is connected to the left end of the top side rod of the inner rectangular support frame 11, the middle part of the long diagonal rod 122 is connected to the right end of the top side rod of the inner rectangular support frame 11, the left end of the upper horizontal rod 121 is connected to the upper end of the short diagonal rod 123, and the right end of the upper horizontal rod 121 is connected to the upper end of the long diagonal rod 122.

[0008] A main mounting base 14 is provided in the middle of the left rod, and another main mounting base 14 is provided at the lower part of the right rod; the outer trapezoidal support frame 12 also includes: a short diagonal connecting rod 124 and a long diagonal connecting rod 125. One end of the short diagonal connecting rod 124 is connected to the lower end of the short diagonal rod 123, and the other end of the short diagonal connecting rod 124 is connected to the main mounting base 14 on the left rod; one end of the long diagonal connecting rod 125 is connected to the lower end of the long diagonal rod 122, and the other end of the long diagonal connecting rod 125 is connected to the main mounting base 14 on the right rod.

[0009] In the aforementioned modular pelvic fixation device, the end face of the main mounting base 14 is provided with a first tooth-shaped structure, and the middle part of the main mounting base 14 is provided with a first threaded rod extending forward.

[0010] The aforementioned modular pelvic fixation device further includes an occlusor 7, which comprises a C-shaped support body, a first locking screw, and a second locking screw. The C-shaped support body has a support frame mounting groove for inserting the bottom U-shaped support frame 13. The first locking screw is installed on the C-shaped support body and passes through the groove wall of the support frame mounting groove. The first locking screw is used to lock the bottom U-shaped support frame 13. The second locking screw passes through the lower side plate of the C-shaped support body from bottom to top. The upper side plate of the C-shaped support body abuts against the upper surface of the bed 8, and the end of the second locking screw abuts against the lower surface of the bed 8.

[0011] The aforementioned modular pelvic fixator further includes: a main mounting clip 3, with one main mounting clip 3 rotatably mounted within each main mounting base 14. Each main mounting clip 3 includes: a mounting clip body 31, a mounting clip nut, and a mounting clip locking member 32. A rotatable mounting clip nut is mounted within the mounting clip body 31. The mounting clip locking member 32 is rotatably mounted on the mounting clip body 31. A first conical tooth structure is provided on the outer periphery of the mounting clip nut, and a second conical tooth structure is provided at the end of the mounting clip locking member 32. The first and second conical tooth structures mesh with each other. The mounting clip nut is mounted on a first threaded rod. The mounting clip locking member 32 has a second tooth structure that matches the first tooth structure. The mounting clip locking member 32 is used to rotate the mounting clip nut to achieve the separation and engagement of the first tooth structure and the second tooth structure.

[0012] The aforementioned modular pelvic fixator further includes: a rod clamp 6, which is mounted on the pelvic fixation bracket 1 and used to install the connecting rod 2. The rod clamp 6 includes: a rod clamp locking screw, a rod clamp locking nut, a first rod clamp piece, a second rod clamp piece, a third rod clamp piece, and a fourth rod clamp piece. The rod clamp locking screw passes through the first rod clamp piece, the second rod clamp piece, the third rod clamp piece, and the fourth rod clamp piece in sequence. The rod clamp locking nut is mounted on the rod clamp locking screw and is used to lock the first rod clamp piece, the second rod clamp piece, the third rod clamp piece, and the fourth rod clamp piece. The fourth piece, the first piece of the rod clamp and the second piece of the rod clamp together form a second connecting rod mounting groove for installing the pelvic fixation bracket 1 or the connecting rod 2. The third piece of the rod clamp and the fourth piece of the rod clamp together form a third connecting rod mounting groove for installing the connecting rod 2. The second piece of the rod clamp has a third tooth structure, and the third piece of the rod clamp has a fourth tooth structure. The third tooth structure and the fourth tooth structure match each other. By rotating the rod clamp locking nut, the separation and engagement of the third tooth structure and the fourth tooth structure and the adjustment of the opening size of the second connecting rod mounting groove and the third connecting rod mounting groove can be realized.

[0013] The aforementioned modular pelvic fixator further includes: a pin clamp 4, wherein each traction pin 5 is mounted on the pelvic fixation bracket 1 or connecting rod 2 via at least one pin clamp 4. The pin clamp 4 includes: a pin clamp locking screw, a pin clamp locking nut, a first pin clamp, a second pin clamp, a third pin clamp, and a fourth pin clamp. The pin clamp locking screw passes sequentially through the first pin clamp, the second pin clamp, the third pin clamp, and the fourth pin clamp. The pin clamp locking nut is mounted on the pin clamp locking screw and is used to lock the first pin clamp, the second pin clamp, and the third pin clamp. The first and second needle bar clamps together form a fourth connecting rod mounting groove for installing the pelvic fixation bracket 1 or connecting rod 2. The third and fourth needle bar clamps together form a traction needle mounting groove for installing the bone traction needle 5. The second needle bar clamp has a fifth tooth structure, and the third needle bar clamp has a sixth tooth structure. The fifth and sixth tooth structures match each other. By rotating the locking nut of the needle bar clamp, the separation and engagement of the fifth and sixth tooth structures and the adjustment of the opening size of the fourth connecting rod mounting groove and the traction needle mounting groove can be achieved.

[0014] The aforementioned modular pelvic fixation device includes two pelvic fixation brackets 1, which are respectively installed on the left and right sides of the bed 8; the two pelvic fixation brackets 1 are respectively located on the left and right sides of the patient's pelvis.

[0015] The aforementioned modular pelvic fixator further includes: multiple connecting rods 9, the two ends of which are connected to two pelvic fixation brackets 1 via rod clamps 6.

[0016] Because this utility model employs the aforementioned technology, it has the following positive effects compared to existing technologies:

[0017] (1) In this utility model, the pelvic fixation bracket is provided with two main mounting seats. The two main mounting seats are located at different horizontal heights. By setting the main mounting seats on the pelvic fixation bracket instead of the traditional bracket which can only connect the connecting rod through the rod clamp, the use of the rod clamp is reduced. At the same time, compared with the pelvic fixation bracket which is installed through the rod clamp, the main mounting seats are directly installed, which has higher stability and better strength. At the same time, it avoids installing too many rod clamps, which may interfere with the connecting rod and the bone traction pin.

[0018] (2) In this utility model, the two main mounting seats are located at different horizontal heights. Since the patient's body size is different and the working position is different, setting the main mounting seats at different heights makes it easier for the doctor to choose a more suitable height to operate on the patient, and there is no need to add a rod clamp, which improves work efficiency.

[0019] (3) In this utility model, the pelvic fixation bracket has an outer ring that is trapezoidal and an inner ring that is rectangular. A main mounting seat is provided on the bracket. The main mounting seat is used to install and lock the connecting rod. The outer trapezoidal support bracket not only allows for more straight segments to be connected to the locking block, but also avoids obstruction of the surgical space during the operation, thus having better applicability.

[0020] (4) In this utility model, the advantage of the outer trapezoidal support frame is that it has a more intuitive and convenient combination of fixing rod schemes. At the same time, the straight section and the locking block can be connected more stably, avoiding the problem of unstable connection of the arc section. The inner rectangular support frame is adopted on the inner side, which has a larger internal operating space and facilitates intraoperative operation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the pelvic fixation bracket of a modular pelvic fixator according to this utility model.

[0022] Figure 2 This is a front view of a modular pelvic fixator according to this utility model.

[0023] Figure 3 This is a schematic diagram of the main mounting clip of a modular pelvic fixator according to this utility model.

[0024] Figure 4 This is a rear view of a modular pelvic fixator according to this utility model.

[0025] Figure 5 This is an embodiment diagram of a modular pelvic fixation device according to the present invention.

[0026] Figure 6 This is a schematic diagram of the installation of the bite device of a modular pelvic fixation device according to this utility model.

[0027] Figure 7 This is an installation diagram of a modular pelvic fixator according to this utility model, showing the pin clamp or rod clamp.

[0028] Figure 8 This is a simplified transmission diagram of the mounting clamp locking component of a modular pelvic fixator according to this utility model.

[0029] Figure 9 This is an embodiment diagram of a modular pelvic fixation device according to the present invention.

[0030] In the attached diagram: 1. Pelvic fixation bracket; 2. Connecting rod; 3. Main mounting clip; 4. Pin bar clip; 5. Bone traction pin; 6. Rod clip; 7. Occlusal device; 8. Bed; 9. Connecting long rod; 11. Inner rectangular support frame; 12. Outer trapezoidal support frame; 13. Bottom U-shaped support frame; 14. Main mounting seat; 31. Mounting clip body; 32. Mounting clip locking element; 121. Upper crossbar; 122. Long diagonal bar; 123. Short diagonal bar; 124. Short diagonal bar connecting rod; 125. Long diagonal bar connecting rod. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0032] Please refer to Figures 1 to 9 As shown, a modular pelvic fixation device is illustrated, comprising: at least one pelvic fixation bracket 1, multiple pelvic fixation brackets 1 detachably mounted on the side of the bed 8, the pelvic fixation brackets 1 being used to mount connecting rods 2 and bone traction pins 5;

[0033] Each pelvic fixation bracket 1 includes: an inner rectangular support frame 11, an outer trapezoidal support frame 12, and a bottom U-shaped support frame 13. The inner rectangular support frame 11 includes: a top side rod, a bottom side rod, a left side rod, and a right side rod. The upper ends of the left side rod and the right side rod are respectively connected to the left and right ends of the top side rod, and the lower ends of the left side rod and the right side rod are respectively connected to the left and right ends of the bottom side rod. The two ends of the bottom side rod of the inner rectangular support frame 11 are respectively connected to a bottom U-shaped support frame 13. The outer trapezoidal support frame 12 includes: an upper horizontal rod 121, a long diagonal rod 122, and a short diagonal rod 123. The middle part of the short diagonal rod 123 is connected to the left end of the top side rod of the inner rectangular support frame 11, the middle part of the long diagonal rod 122 is connected to the right end of the top side rod of the inner rectangular support frame 11, the left end of the upper horizontal rod 121 is connected to the upper end of the short diagonal rod 123, and the right end of the upper horizontal rod 121 is connected to the upper end of the long diagonal rod 122.

[0034] A main mounting base 14 is provided in the middle of the left rod, and another main mounting base 14 is provided at the lower part of the right rod; the outer trapezoidal support frame 12 also includes: a short diagonal connecting rod 124 and a long diagonal connecting rod 125. One end of the short diagonal connecting rod 124 is connected to the lower end of the short diagonal rod 123, and the other end of the short diagonal connecting rod 124 is connected to the main mounting base 14 on the left rod; one end of the long diagonal connecting rod 125 is connected to the lower end of the long diagonal rod 122, and the other end of the long diagonal connecting rod 125 is connected to the main mounting base 14 on the right rod.

[0035] Furthermore, in a preferred embodiment, the end face of the main mounting base 14 is provided with a first toothed structure, and the middle part of the main mounting base 14 is provided with a first threaded rod extending forward.

[0036] Furthermore, in a preferred embodiment, it further includes: an bite device 7, which includes: a C-shaped bracket body, a first locking screw and a second locking screw. The C-shaped bracket body has a support frame mounting groove for inserting into the bottom U-shaped support frame 13. The first locking screw is installed on the C-shaped bracket body and passes through the groove wall of the support frame mounting groove. The first locking screw is used to lock the bottom U-shaped support frame 13. The second locking screw passes through the lower side plate of the C-shaped bracket body from bottom to top. The upper side plate of the C-shaped bracket body abuts against the upper surface of the bed 8, and the end of the second locking screw abuts against the lower surface of the bed 8.

[0037] Furthermore, in a preferred embodiment, it further includes: a main mounting clip 3, with one main mounting clip 3 rotatably mounted in each main mounting base 14. Each main mounting clip 3 includes: a mounting clip body 31, a mounting clip nut, and a mounting clip locking member 32. A rotatable mounting clip nut is installed in the mounting clip body 31. The mounting clip locking member 32 is rotatably mounted on the mounting clip body 31. A first conical tooth structure is provided on the outer periphery of the mounting clip nut, and a second conical tooth structure is provided at the end of the mounting clip locking member 32. The first and second conical tooth structures mesh with each other. The mounting clip nut is mounted on a first threaded rod. The mounting clip locking member 32 is provided with a second tooth structure that matches the first tooth structure. The mounting clip locking member 32 is used to rotate the mounting clip nut to achieve the separation and engagement of the first tooth structure and the second tooth structure.

[0038] Furthermore, in a preferred embodiment, it further includes: a rod clamp 6, which is mounted on the pelvic fixation bracket 1 and is used to install the connecting rod 2. The rod clamp 6 includes: a rod clamp locking screw, a rod clamp locking nut, a first rod clamp piece, a second rod clamp piece, a third rod clamp piece, and a fourth rod clamp piece. The rod clamp locking screw passes through the first rod clamp piece, the second rod clamp piece, the third rod clamp piece, and the fourth rod clamp piece in sequence. The rod clamp locking nut is mounted on the rod clamp locking screw and is used to lock the first rod clamp piece, the second rod clamp piece, the third rod clamp piece, and the fourth rod clamp piece. The four clamp pieces, the first and second clamp pieces together, form a second connecting rod mounting groove for installing the pelvic fixation bracket 1 or the connecting rod 2. The third and fourth clamp pieces together form a third connecting rod mounting groove for installing the connecting rod 2. The second clamp piece has a third tooth structure, and the third clamp piece has a fourth tooth structure. The third and fourth tooth structures are matched. By rotating the clamp locking nut, the separation and engagement of the third and fourth tooth structures and the adjustment of the opening size of the second and third connecting rod mounting grooves can be achieved.

[0039] Furthermore, in a preferred embodiment, it further includes: a needle bar clamp 4, wherein each bone traction needle 5 is mounted on the pelvic fixation bracket 1 or the connecting rod 2 via at least one needle bar clamp 4. The needle bar clamp 4 includes: a needle bar clamp locking screw, a needle bar clamp locking nut, a first needle bar clamp, a second needle bar clamp, a third needle bar clamp, and a fourth needle bar clamp. The needle bar clamp locking screw passes sequentially through the first needle bar clamp, the second needle bar clamp, the third needle bar clamp, and the fourth needle bar clamp. The needle bar clamp locking nut is mounted on the needle bar clamp locking screw and is used to lock the first needle bar clamp, the second needle bar clamp, and the third needle bar clamp. The first and second needle bar clamps together form a fourth connecting rod mounting groove for installing the pelvic fixation bracket 1 or connecting rod 2. The third and fourth needle bar clamps together form a traction needle mounting groove for installing the bone traction needle 5. The second needle bar clamp has a fifth tooth structure, and the third needle bar clamp has a sixth tooth structure. The fifth and sixth tooth structures match each other. By rotating the locking nut of the needle bar clamp, the separation and engagement of the fifth and sixth tooth structures and the adjustment of the opening size of the fourth connecting rod mounting groove and the traction needle mounting groove can be achieved.

[0040] Furthermore, in a preferred embodiment, the modular pelvic fixation device includes: two pelvic fixation brackets 1, which are respectively installed on the left and right sides of the bed 8; the two pelvic fixation brackets 1 are respectively located on the left and right sides of the patient's pelvis.

[0041] Furthermore, in a preferred embodiment, it further includes: a plurality of connecting rods 9, the two ends of which are respectively connected to two pelvic fixation brackets 1 via rod clamps 6. Each connecting rod 9 can be used to install needle clamps 4 and rod clamps 6, so as to install bone traction needles 5 on the upper side and obliquely of the patient's pelvis, thereby increasing the installation angle and position of bone traction needles 5. The specific installation position can be determined by the operator.

[0042] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention.

[0043] Based on the above, this utility model also has the following embodiments:

[0044] In a further embodiment of this utility model, the needle clamp 4 and the rod clamp 6 have the same structure but differ in size, and are used to connect any two of the connecting rod 2, the bone traction needle 5, and the pelvic fixation bracket 1. Each consists of a first and a second piece forming an adjustable opening mounting groove, and a third and a fourth piece forming another adjustable opening mounting groove. The second and third pieces engage through a toothed structure and are locked by a locking screw and a locking nut. Figure 7As shown, to avoid relative rotation between the second and third pieces during application, which could cause injury to the patient, and by loosening the locking nut, the second and third pieces can be separated to both sides, allowing relative rotation between the connecting rod 2 and the pelvic fixation bracket 1, the connecting rod 2 and the bone traction pin 5, or the bone traction pin 5 and the pelvic fixation bracket 1, so as to adjust the working position.

[0045] In a further embodiment of this utility model, such as Figure 3 The diagram shown is a structural schematic of the main mounting clip 3. The main mounting clip 3 includes: a mounting clip body 31 and a mounting clip locking element 32, and its transmission structure is as follows: Figure 8 As shown, by rotating the mounting clamp locking member 32, the mounting clamp nut is rotated by the helical tooth engagement, so that the mounting clamp nut drives the mounting clamp body 31 to move along the first threaded rod until the first tooth structure and the second tooth structure mesh with each other, thus preventing the connecting rod 2 inside the mounting clamp body 31 from rotating during operation.

[0046] In a further embodiment of this utility model, the pelvic fixation bracket 1 is provided with two main mounting seats 14, which are located at different horizontal heights, such as... Figure 1 As shown, by setting a main mounting base 14 on the pelvic fixation bracket 1 instead of the traditional bracket which can only connect the connecting rod 2 through the rod clamp 6, the use of the rod clamp 6 is reduced. At the same time, compared with the pelvic fixation bracket 1, the main mounting base 14 is directly installed, which has higher stability and better strength. It also avoids installing too many rod clamps 6, which would interfere with the connecting rod 2 and the bone traction pin 5.

[0047] In a further embodiment of this utility model, the two main mounting bases 14 are located at different horizontal heights. Since patients have different body shapes and working positions, setting the main mounting bases 14 at different heights makes it easier for doctors to choose a more suitable height to operate on the patient, and there is no need to add a rod clamp 6, thus improving work efficiency.

[0048] In a further embodiment of this utility model, the design is an intraoperative fixation frame for orthopedic hip joint surgery, made of carbon fiber to meet the requirements of intraoperative fluoroscopic imaging and reduce overall weight. This embodiment uses two pelvic fixation supports 1, respectively installed on the left and right sides of the bed 8; it is mainly composed of the two pelvic fixation supports 1 and connecting rods 2 of arbitrary length. The two pelvic fixation supports 1 are constructed of rectangular and trapezoidal carbon fiber rods to ensure structural strength and operational flexibility. Arbitrary rotation joints are set inside the two pelvic fixation supports 1, and swingable connecting rods 2 are installed on these joints. One end of the connecting rod 2 is stably connected to the pelvic fixation support 1 through a threaded structure. Through the design of the rotation joints, the connecting rods 2 can be freely adjusted to any angle and position, providing more diverse instrument fixation options and effectively improving the convenience and safety of surgical operations. This design not only ensures structural stability but also enhances the flexibility of intraoperative operations, and can be widely applied to various orthopedic surgical scenarios such as hip replacement and repair.

[0049] In a further embodiment of this utility model, the rotating joint is a rod clamp 6 and a needle clamp 4. It can adopt the structure in this application or directly adopt the existing structure without affecting the protection of the pelvic fixation bracket 1 in this application. It needs to have the functions of being detachable, rotating and locking at the same time, and the structure and size can be adjusted according to the structural adaptability of the pelvic fixation bracket 1.

[0050] In a further embodiment of this utility model, the bite device 7 can adopt either the structure in this application or the existing structure directly, without affecting the protection of the pelvic fixation bracket 1 in this application. The structure and size can be adjusted according to the structural adaptability of the bed 8 and the pelvic fixation bracket 1.

[0051] In a further embodiment of this utility model, the pelvic fixation bracket 1 has an outer ring that is trapezoidal and an inner ring that is rectangular, and a main mounting seat 14 is provided on it. The main mounting seat 14 is used to install and lock the connecting rod 2.

[0052] In a further embodiment of this utility model, the outer trapezoidal support frame 12 not only facilitates the connection of more straight segments with the locking block, but also avoids obstruction of the surgical space during the operation, thus having better applicability.

[0053] In a further embodiment of this utility model, the outer trapezoidal support frame 12 has the advantage of a more intuitive and convenient combination of fixing rods. Simultaneously, the straight section and locking block can be connected more securely, avoiding the problem of unstable connection in the arc section. The inner side uses an inner rectangular support frame 11, providing a larger internal operating space and facilitating intraoperative manipulation.

[0054] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A modular pelvic fixator, characterized in that, include: At least one pelvic fixation bracket (1), and multiple pelvic fixation brackets (1) are detachably mounted on the side of the bed (8). The pelvic fixation brackets (1) are used to mount connecting rods (2) and bone traction pins (5). Each of the pelvic fixation brackets (1) includes: an inner rectangular support frame (11), an outer trapezoidal support frame (12), and a bottom U-shaped support frame (13). The inner rectangular support frame (11) includes: a top side rod, a bottom side rod, a left side rod, and a right side rod. The upper ends of the left side rod and the right side rod are respectively connected to the left and right ends of the top side rod, and the lower ends of the left side rod and the right side rod are respectively connected to the left and right ends of the bottom side rod. The two ends of the bottom side rod of the inner rectangular support frame (11) are respectively connected to a bottom U-shaped support frame. (13) Connection; The outer trapezoidal support frame (12) includes: an upper horizontal bar (121), a long diagonal bar (122) and a short diagonal bar (123), the middle part of the short diagonal bar (123) is connected to the left end of the top side bar of the inner rectangular support frame (11), the middle part of the long diagonal bar (122) is connected to the right end of the top side bar of the inner rectangular support frame (11), the left end of the upper horizontal bar (121) is connected to the upper end of the short diagonal bar (123), and the right end of the upper horizontal bar (121) is connected to the upper end of the long diagonal bar (122); A main mounting seat (14) is provided in the middle of the left rod, and another main mounting seat (14) is provided at the lower part of the right rod; the outer trapezoidal support frame (12) also includes: a short diagonal connecting rod (124) and a long diagonal connecting rod (125), one end of the short diagonal connecting rod (124) is connected to the lower end of the short diagonal rod (123), and the other end of the short diagonal connecting rod (124) is connected to the main mounting seat (14) on the left rod; one end of the long diagonal connecting rod (125) is connected to the lower end of the long diagonal rod (122), and the other end of the long diagonal connecting rod (125) is connected to the main mounting seat (14) on the right rod.

2. The modular pelvic fixator according to claim 1, characterized in that, The end face of the main mounting base (14) is provided with a first tooth structure, and the middle part of the main mounting base (14) is provided with a first threaded rod extending forward.

3. The modular pelvic fixator according to claim 2, characterized in that, Also includes: The bite device (7) includes: a C-shaped bracket body, a first locking screw and a second locking screw. The C-shaped bracket body has a support frame mounting groove for inserting the bottom U-shaped support frame (13). The first locking screw is installed on the C-shaped bracket body and passes through the groove wall of the support frame mounting groove. The first locking screw is used to lock the bottom U-shaped support frame (13). The second locking screw passes through the lower side plate of the C-shaped bracket body from bottom to top. The upper side plate of the C-shaped bracket body abuts against the upper surface of the bed (8). The end of the second locking screw abuts against the lower surface of the bed (8).

4. The modular pelvic fixator according to claim 2, characterized in that, Also includes: A main mounting clip (3) is rotatably mounted in each main mounting base (14). Each main mounting clip (3) includes: a mounting clip body (31), a mounting clip nut, and a mounting clip locking member (32). A rotatable mounting clip nut is installed in the mounting clip body (31). The mounting clip locking member (32) is rotatably mounted on the mounting clip body (31). A first conical tooth structure is provided on the outer periphery of the mounting clip nut. A second conical tooth structure is provided at the end of the mounting clip locking member (32). The first conical tooth structure and the second conical tooth structure mesh. The mounting clip nut is mounted on a first threaded rod. The mounting clip locking member (32) is provided with a second tooth structure that matches the first tooth structure. The mounting clip locking member (32) is used to rotate the mounting clip nut to realize the separation and engagement of the first tooth structure and the second tooth structure.

5. The modular pelvic fixator according to claim 2, characterized in that, Also includes: A rod clamp (6) is installed on the pelvic fixation bracket (1). The rod clamp (6) is used to install the connecting rod (2). The rod clamp (6) includes: a rod clamp locking screw, a rod clamp locking nut, a first rod clamp piece, a second rod clamp piece, a third rod clamp piece, and a fourth rod clamp piece. The rod clamp locking screw passes through the first rod clamp piece, the second rod clamp piece, the third rod clamp piece, and the fourth rod clamp piece in sequence. The rod clamp locking nut is installed on the rod clamp locking screw and is used to lock the first rod clamp piece, the second rod clamp piece, the third rod clamp piece, and the fourth rod clamp piece. The first piece and the second piece of the rod clamp together form a second connecting rod mounting groove for installing a pelvic fixation bracket (1) or a connecting rod (2). The third piece and the fourth piece of the rod clamp together form a third connecting rod mounting groove for installing a connecting rod (2). The second piece of the rod clamp is provided with a third tooth structure, and the third piece of the rod clamp is provided with a fourth tooth structure. The third tooth structure and the fourth tooth structure are matched. By rotating the rod clamp locking nut, the separation and engagement of the third tooth structure and the fourth tooth structure and the adjustment of the opening size of the second connecting rod mounting groove and the third connecting rod mounting groove can be realized.

6. The modular pelvic fixator according to claim 2, characterized in that, Also includes: A needle bar clamp (4) is used to mount each bone traction needle (5) onto a pelvic fixation bracket (1) or connecting rod (2) via at least one needle bar clamp (4). The needle bar clamp (4) includes: a needle bar clamp locking screw, a needle bar clamp locking nut, a first needle bar clamp, a second needle bar clamp, a third needle bar clamp, and a fourth needle bar clamp. The needle bar clamp locking screw passes sequentially through the first, second, third, and fourth needle bar clamps. The needle bar clamp locking nut is mounted on the needle bar clamp locking screw and is used to lock the first, second, third, and fourth needle bar clamps. The first and second needle bar clamps together form a fourth connecting rod mounting groove for installing a pelvic fixation bracket (1) or a connecting rod (2). The third and fourth needle bar clamps together form a traction pin mounting groove for installing a bone traction pin (5). The second needle bar clamp has a fifth tooth structure, and the third needle bar clamp has a sixth tooth structure. The fifth and sixth tooth structures match each other. By rotating the locking nut of the needle bar clamp, the separation and engagement of the fifth and sixth tooth structures and the adjustment of the opening size of the fourth connecting rod mounting groove and the traction pin mounting groove can be achieved.

7. The modular pelvic fixator according to any one of claims 1 to 6, characterized in that, The modular pelvic fixation device includes: two pelvic fixation brackets (1), which are respectively installed on the left and right sides of the bed (8); the two pelvic fixation brackets (1) are respectively located on the left and right sides of the patient's pelvis.

8. The modular pelvic fixator according to claim 7, characterized in that, Also includes: Multiple connecting rods (9) are provided, with both ends of the connecting rods (9) connected to two pelvic fixation brackets (1).

Images