A pelvic support fixing device

Abstract

The utility model discloses a pelvic internal support fixing device, which specifically relates to the technical field of medical auxiliary instruments, including two pelvic screws, the upper ends of the two pelvic screws are fixedly connected to a limiting assembly, the inside of the two limiting assemblies are provided with a bending rod, the upper sides of the two limiting assemblies are provided with a fixing assembly, the ends of the two bending rods close to each other are slidably connected with a sliding rod, and the outer surface of the bending rod is provided with a screw that penetrates the bending rod and the sliding rod and extends to the outside of the bending rod. The pelvic internal support fixing device described in the utility model adopts a bending rod and a sliding rod for sliding connection, so that the overall length of the bending rod and the sliding rod can be adjusted, which is convenient for pelvic fixation of different patients, without preparing multiple bending rods, and when the two pelvic screws are tilted, the rotatable assembly can adjust the angle of the sliding rods on the left and right sides, so that the bending rod and the sliding rod as a whole are more closely fitted to the patient's pelvis, further ensuring the stability of pelvic fixation.

Description

Technical Field

[0001] The utility model relates to the technical field of medical auxiliary instruments, in particular to a pelvic internal support fixing device. Background Art

[0002] Pelvic fracture is a type of serious orthopedic injury. Common surgical fixation methods include anterior pelvic ring fixation, posterior pelvic ring fixation and channel screw fixation. The main methods of anterior pelvic ring fixation include external fixator, plate screw fixation, percutaneous nail rod system fixation and simple screw fixation; posterior pelvic fixation includes trans-iliac plate fixation, iliac rod fixation, trans-iliac nail rod fixation and adjustable bone plate; channel screw fixation mainly includes spinal pelvic nail rod system fixation, which is suitable for the situation where the pelvis and lumbar spine are fixed together.

[0003] The existing anterior pelvic ring fixation cannot conveniently adjust the inclination angle between the instrument and the pelvis, and is not easy to adjust the size of the instrument. If instrument fixation of different lengths and angles is required, multiple connected bending rods need to be prepared until a bending rod that is more suitable for the patient's pelvic size and fixation position is found.

[0004] Chinese patent document CN211023032U discloses a pelvic internal support fixing system, comprising a first iliac screw and a second iliac screw arranged at intervals, both iliac screws comprising a screw head and a bolt, and both iliac screws are hollow structures penetrating the screw head and the bolt; a connecting rod, one end of which is connected to the first iliac screw, and the other end of which is connected to the second iliac screw; and the connecting rod is an arc-shaped structure. The problem of large exposure and large trauma in pelvic fracture surgery in the prior art is solved, but the above patent document still has the following defects during use:

[0005] The above patent document requires the preparation of multiple connecting rods during use to adapt to the pelvic fixation of different patients. The length and bending radius of the prefabricated connecting rods may not conform to the fixed size and position of the patient's pelvis, affecting the firmness of the fixation or causing additional trauma to the patient. Utility Model Content

[0006] The main purpose of the utility model is to provide a pelvic internal support fixing device, which can effectively solve the problem that it is inconvenient to flexibly adjust the size of the bending rod.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A pelvic internal support fixing device includes two pelvic screws, the upper ends of the two pelvic screws are fixedly connected to a limiting assembly, the two limiting assemblies are each provided with a bending rod inside, the upper sides of the two limiting assemblies are each provided with a fixing assembly, the ends of the two bending rods close to each other are slidably connected with a sliding rod that passes through the bending rod and extends to the inside of the bending rod, the outer surface of the bending rod is provided with a screw that passes through the bending rod and the sliding rod and extends to the outside of the bending rod, and the screw is threadedly connected to the sliding rod.

[0009] Preferably, two through slots 1 are symmetrically provided on the upper part of the outer surface of the bending rod, two through slots 2 that penetrate the bending rod are symmetrically provided on the front part of the outer surface of the bending rod, and the screw 1 is arranged inside the through slot 2.

[0010] Preferably, the limiting assembly comprises a medical elastic block 1, the upper end of which is symmetrically fixedly connected with two half rings in the front and rear directions, and the medical elastic block 1 is fixedly connected to the pelvic screw on the same side.

[0011] Preferably, the fixing assembly comprises a second screw, the lower end of which is fixedly connected to a second medical elastic block, and the middle part of the lower end of the second medical elastic block is fixedly connected to a threaded rod.

[0012] Preferably, the threaded rod passes through the medical elastic block 1 on the same side, extends into the interior of the pelvic screw and is threadedly connected to the pelvic screw, and the screw 2 is threadedly connected to the two half rings on the same side.

[0013] Preferably, a plurality of thread grooves penetrating the slide rod are provided on the front side of the outer surface of the slide rod, and a ball is fixedly connected to one end of the slide rod close to the rotating assembly.

[0014] Preferably, the rotating assembly includes a screw three, and the upper portion of the outer surface of the screw three is symmetrically threaded with two fixing members that penetrate the screw three and extend to the interior of the screw three.

[0015] Preferably, the two balls are movably connected to screw three.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model adopts a bending rod and a sliding rod for sliding connection, so that the overall length of the bending rod and the sliding rod can be adjusted, which is convenient for pelvic fixation for different patients without preparing multiple bending rods. At the same time, when the two pelvic screws are set at an angle, the angles of the left and right sliding rods can be adjusted by using a rotating component according to the inclination angle of the two pelvic screws and then fixed, thereby changing the overall curvature of the bending rod and the sliding rod, making it fit the patient's pelvis more closely, and further ensuring the stability of pelvic fixation.

[0018] When fixing the bent rod, the utility model cooperates with the through groove 1 with a larger diameter, so that when the pelvic screw is tilted, the fixing component can still smoothly fix the bent rod and the pelvic screw. At the same time, when the threaded rod is threadedly connected with the pelvic screw, the medical elastic block 2 is used to squeeze the bent rod, thereby increasing the contact area between the medical elastic block 2 and the bent rod, so that the fixing component fixes the bent rod more firmly. At the same time, the pelvic screw is fixed first, and then the bent rod is fixed, which is also convenient for adjusting the position of the bent rod inside the semi-ring, so as to avoid the bent rod being too long and causing additional trauma to the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the overall structure of the limit assembly of the utility model;

[0021] Figure 3 This is a schematic diagram of the overall structure of the fixing assembly of the utility model;

[0022] Figure 4 It is a partial structural schematic diagram of the utility model;

[0023] Figure 5 For the utility model Figure 4 Enlarged schematic diagram at point A in the middle.

[0024] In the figure: 1. fixing assembly; 2. limiting assembly; 3. bending rod; 4. pelvic screw; 5. screw one; 6. sliding rod; 7. rotating assembly; 21. half ring; 22. medical elastic block one; 11. screw two; 12. medical elastic block two; 13. threaded rod; 31. through groove one; 32. through groove two; 61. threaded groove; 62. ball; 71. fixing piece; 72. screw three. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0026] like Figure 1 As shown, a pelvic internal support fixing device includes two pelvic screws 4, the upper ends of the two pelvic screws 4 are fixedly connected to the limiting components 2, the two limiting components 2 are each provided with a bending rod 3 inside, the upper sides of the two limiting components 2 are each provided with a fixing component 1, the ends of the two bending rods 3 close to each other are slidably connected with a sliding rod 6 that penetrates the bending rod 3 and extends to the inside of the bending rod 3, the outer surface of the bending rod 3 is provided with a screw 5 that penetrates the bending rod 3 and the sliding rod 6 and extends to the outside of the bending rod 3, and the screw 5 is threadedly connected to the sliding rod 6.

[0027] During the specific implementation of the utility model, firstly, the two pelvic screws 4 are respectively driven into the pelvis, and then the whole composed of the bending rod 3 and the sliding rod 6 can be placed on the upper part of the limiting component 2, and the position of one side of the bending rod 3 is fixed by using the fixing component 1, and then the whole composed of the bending rod 3 and the sliding rod 6 is adjusted according to the size between the two pelvic screws 4 and the inclination angle between the two pelvic screws 4, and the fixation between the bending rod 3 and the sliding rod 6 by the screws 5 is released, and the sliding rod 6 is slid so that the spacing is adapted, and then the bending curvature can be adjusted by using the rotating component 7. After the adjustment is completed, the bending rod 3 and the pelvic screw 4 on the other side are fixed by using the fixing component 1 to complete the fixation of the anterior pelvic ring.

[0028] Specifically, in order to improve the stability of the device, referring to the figure, two through grooves 31 are symmetrically provided on the upper part of the outer surface of the bending rod 3, and two through grooves 32 penetrating the bending rod 3 are symmetrically provided on the front part of the outer surface of the bending rod 3, and the screw 5 is arranged inside the through groove 32;

[0029] For further information, see Figure 2 The limiting assembly 2 includes a medical elastic block 22, the upper end of which is symmetrically fixedly connected to two half rings 21, and the medical elastic block 22 is fixedly connected to the pelvic screw 4 on the same side;

[0030] For further information, see Figure 3 The fixing assembly 1 includes a screw 11, the lower end of the screw 11 is fixedly connected to a medical elastic block 12, and the middle part of the lower end of the medical elastic block 12 is fixedly connected to a threaded rod 13;

[0031] For further information, see Figure 3 The threaded rod 13 passes through the medical elastic block 1 22 on the same side and extends to the inside of the pelvic screw 4 and is threadedly connected to the pelvic screw 4. The screw 2 11 is threadedly connected to the two half rings 21 on the same side.

[0032] The diameter of the through slot 1 31 is much larger than the diameter of the threaded rod 13 , so that the threaded rod 13 can still be threadedly connected with the pelvic screw 4 when the pelvic screw 4 is tilted.

[0033] It can be seen that after the two pelvic screws 4 are fixed, the whole composed of the bending rod 3 and the sliding rod 6 is placed on the medical elastic blocks 22 on both sides, and the bending rod 3 will squeeze the medical elastic blocks 22. The positions of the bending rod 3 and the pelvic screws 4 are adjusted, and then one of the fixing components 1 is taken out to fix the positions of the bending rod 3 and the pelvic screws 4, and the threaded rod 13 is passed through the through slot 31, and then the threaded rod 13 is rotated. When the threaded rod 13 moves into the inside of the pelvic screw 4, the medical elastic block 12 will squeeze the bending rod 3. Deformation occurs, and as the threaded rod 13 continues to move into the pelvic screw 4, the screw 2 11 begins to be threadedly connected with the half ring 21, and cooperates with the medical elastic block 2 12 and the medical elastic block 1 22 to squeeze the bending rod 3, thereby increasing the contact surface of the bending rod 3 and further improving the firmness of the fixation of the bending rod 3. Subsequently, the overall length and bending curvature of the bending rod 3 and the sliding rod 6 can be adjusted according to the specific distance between the two pelvic screws 4. After the adjustment is completed, the bending rod 3 and the pelvic screw 4 on the other side can be fixed using another fixing component 1.

[0034] Specifically, in order to make the device applicable to a wider range of patients, referring to the figure, a plurality of thread grooves 61 penetrating the slide bar 6 are provided on the front side of the outer surface of the slide bar 6, and a ball 62 is fixedly connected to one end of the slide bar 6 close to the rotating assembly 7;

[0035] For further information, see Figure 5 The rotating assembly 7 includes a screw 3 72, and the upper portion of the outer surface of the screw 3 72 is symmetrically threaded with two fixing members 71 that penetrate through the screw 3 72 and extend to the interior of the screw 3 72;

[0036] For further information, see Figure 5 , the two balls 62 are movably connected to the screw three 72;

[0037] It can be seen that when adjusting the overall length and bending curvature of the bending rod 3 and the sliding rod 6, the screw 1 5 on one side can be rotated to release the fixation between the bending rod 3 and the sliding rod 6, and then the sliding rod 6 can be slid until the length adjustment is completed, and the screw 1 5 can be used again to correspond to the position of the through groove 2 32 and the thread groove 61 on the same side, and the screw 1 5 can be rotated again to make the screw 1 5 and the sliding rod 6 threadedly connected to fix the position of the sliding rod 6 and the screw 1 5. If the adjustment is not successful, the screw 1 5 on the other side can be continued to be adjusted;

[0038] When the two pelvic screws 4 are in use, the inclination angles are different, which will affect the firmness of the fixation of the bending rod 3 and the pelvic screws 4. The fixing parts 71 on both sides can be rotated to release the fixation of the screw three 72 and the balls 62 on both sides. At this time, the angle between the two sliding rods 6 can be adjusted until the fixed bending rod 3 on the other side is placed on the upper part of the medical elastic block 22 for easy fixation. At this time, the fixing parts 71 on both sides are rotated to fix the angles of the balls 62 on both sides inside the screw three 72, and then the bending rod 3 is fixed using another fixing component 1 to complete the fixation of the anterior pelvic ring.

[0039] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A pelvic internal support fixing device, comprising two pelvic screws (4), characterized in that: The upper ends of the two pelvic screws (4) are fixedly connected to the limit assembly (2), the two limit assemblies (2) are provided with a bending rod (3) inside, the upper sides of the two limit assemblies (2) are provided with a fixing assembly (1), the ends of the two bending rods (3) close to each other are slidably connected with a sliding rod (6) that passes through the bending rod (3) and extends to the inside of the bending rod (3), the outer surface of the bending rod (3) is provided with a screw (5) that passes through the bending rod (3) and the sliding rod (6) and extends to the outside of the bending rod (3), and the screw (5) is threadedly connected to the sliding rod (6).

2. A pelvic support fixing device according to claim 1, characterized in that: The upper portion of the outer surface of the bending rod (3) is symmetrically provided with two first through grooves (31), and the front portion of the outer surface of the bending rod (3) is symmetrically provided with two second through grooves (32) penetrating the bending rod (3), and the first screw (5) is arranged inside the second through groove (32).

3. A pelvic support fixing device according to claim 1, characterized in that: The limiting assembly (2) comprises a medical elastic block (22), the upper end of which is symmetrically fixedly connected to two half rings (21) in a front-to-back manner, and the medical elastic block (22) is fixedly connected to the pelvic screw (4) on the same side.

4. A pelvic support fixing device according to claim 1, characterized in that: The fixing assembly (1) comprises a second screw (11), the lower end of the second screw (11) being fixedly connected to a second medical elastic block (12), and the middle part of the lower end of the second medical elastic block (12) being fixedly connected to a threaded rod (13).

5. A pelvic internal support fixing device according to claim 4, characterized in that: The threaded rod (13) passes through the medical elastic block 1 (22) on the same side, extends into the interior of the pelvic screw (4) and is threadedly connected to the pelvic screw (4), and the screw 2 (11) is threadedly connected to the two half rings (21) on the same side.

6. The pelvic internal support fixing device according to claim 1, characterized in that: A plurality of thread grooves (61) penetrating the slide rod (6) are provided on the front side of the outer surface of the slide rod (6), and a round ball (62) is fixedly connected to one end of the slide rod (6) close to the rotating assembly (7).

7. A pelvic support fixing device according to claim 6, characterized in that: The rotating assembly (7) comprises a screw three (72), and the upper portion of the outer surface of the screw three (72) is symmetrically threadedly connected with two fixing members (71) that penetrate through the screw three (72) and extend into the interior of the screw three (72).

8. The pelvic internal support fixing device according to claim 7, characterized in that: The two balls (62) are movably connected to screw three (72).

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