A lateral pelvic positioner for surgery

Abstract

The application discloses a lateral lying pelvis fixator for surgery, which comprises a left extrusion fixing part and a right extrusion fixing part, wherein the left extrusion fixing part and the right extrusion fixing part each comprise a height adjusting rod, a transverse adjusting rod, a connecting rod, an extrusion plate, a pneumatic bidirectional locking mechanism and a control valve; the height adjusting rod, the connecting rod and the transverse adjusting rod each comprise an inner rod and an outer rod, the outer rod is arranged on the outer side of the inner rod, the pneumatic bidirectional locking mechanism is arranged between the inner rod and the outer rod of the height adjusting rod, the connecting rod and the transverse adjusting rod, the outer rod of the connecting rod is vertically fixed at the end of the outer rod of the transverse adjusting rod, the extrusion plate is arranged at the end of the inner rod of the connecting rod, and the control valve controls the closing of the pneumatic bidirectional locking mechanism, so that the locking and releasing actions can be completed by one key, different body types can be adapted, the precise positioning and stable patient lateral lying body position in orthopedic surgery can be ensured, the nerves and blood vessels can be protected from compression, and the efficiency of the surgery is improved.

Description

Technical Field

[0001] This invention relates to a surgical instrument, specifically to a lateral decubitus pelvic fixator for surgery. Background Technology

[0002] In orthopedic surgery, the stability of a patient's lateral decubitus position directly affects the precision and safety of the surgical procedure. Pelvic fixation, as a crucial step, plays a decisive role in maintaining positional stability. Traditional pelvic fixation methods, such as sandbag stacking and simple strap binding, lack targeted adjustment structures and are difficult to precisely fit patients of different body types. During prolonged surgical procedures, displacement and swaying are prone to occur, increasing surgical risks. While some new fixation devices have introduced adjustable structures to adapt to different body types with advancements in medical technology, most employ multi-segment adjustment rod designs. After adjustment, each point needs to be fixed sequentially, a cumbersome and time-consuming process that delays surgical preparation time and distracts medical staff. Furthermore, these devices often suffer from insufficient fixation strength after adjustment, failing to provide reliable and stable support for surgery. Therefore, there is an urgent need to develop a surgical lateral decubitus pelvic fixator that is easy to operate, highly adaptable, and provides stable fixation. Summary of the Invention

[0003] The purpose of this invention is to solve the problems in the prior art and provide a surgical lateral decubitus pelvic fixator.

[0004] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0005] A surgical lateral decubitus pelvic fixator includes a left compression fixation component and a right compression component. Both the left and right compression fixation components include a height adjustment rod, a lateral adjustment rod, a connecting rod, a compression plate, a pneumatic bidirectional locking mechanism, and a control valve. Each of the height adjustment rod, connecting rod, and lateral adjustment rod includes an inner rod and an outer rod, with the outer rod sleeved outside the inner rod. The pneumatic bidirectional locking mechanism is provided between the inner and outer rods of each of the height adjustment rod, connecting rod, and lateral adjustment rod. The outer rod of the connecting rod is vertically fixed to the end of the outer rod of the lateral adjustment rod. The compression plate is located at the end of the inner rod of the connecting rod. A control valve controls the closing of the pneumatic bidirectional locking mechanism of the left compression fixation component, and another control valve controls the closing of the pneumatic bidirectional locking mechanism of the right compression component. The energization and de-energization of the control valves can be achieved by installing a switch; this is a mature existing technology and will not be elaborated upon in this application.

[0006] This invention uses a left compression fixation component and a right compression fastener to fix both sides of the pelvis. The height can be adjusted by extending and retracting the inner rod of the height adjustment rod within the outer rod. The length can be adjusted by extending and retracting the inner and outer rods of the lateral adjustment rod. The angle can be adjusted by rotating the inner rod within the outer rod. A control valve controls the closure of the pneumatic bidirectional locking mechanism at all positions, enabling one-button locking and releasing. This allows for adaptation to different body types, ensuring precise positioning and stability of the patient's lateral decubitus position during orthopedic surgery, protecting nerves and blood vessels from compression, and improving surgical efficiency. Furthermore, the fixation after extension and rotation can be completed with the simple press of a switch, which is far more convenient than the traditional method of individually fixing each adjustment rod after adjusting according to the patient's size.

[0007] Preferably, the pneumatic bidirectional locking mechanism includes a clamping block, a fixing ring, and an annular airbag. The side wall of the fixing ring is provided with a sliding groove along the radial direction. There are several sliding grooves in an annular array. The clamping block is slidably disposed in the sliding groove. The annular airbag is sleeved on the outer side wall of the fixing ring to control the radial reciprocating motion of the clamping block.

[0008] This invention utilizes a ring-shaped array of grooves and sliding clamping blocks, along with an annular airbag fitted onto the outer wall, to clamp and release the inner rod. When the annular airbag at each position inflates, the resulting pressure evenly propels each clamping block to move synchronously radially, clamping the sidewall of the inner rod at each position and achieving fixation in one step. Compared to the traditional method of adjusting and fixing one by one, this significantly improves operational efficiency and shortens surgical preparation time. Furthermore, this uniform force-bearing fixation mode avoids problems such as excessive local pressure or unstable fixation, enhancing fixation stability and ensuring surgical safety. After deflation, the clamping blocks quickly reset, facilitating disassembly of the device by medical staff and providing convenience for postoperative care. This fully meets the needs of orthopedic lateral decubitus surgery for efficient, precise, and safe pelvic fixation.

[0009] Meanwhile, the ring-shaped airbag has a certain degree of elasticity, which allows the clamping block to have a certain clamping force even when the ring-shaped airbag is not inflated. This allows the inner rod to be pre-fixed after extension and retraction, eliminating the need for manual support of the inner rod after adjustment and ensuring the accuracy of adjustment.

[0010] Preferably, the fixed ring has a dual-modal clamping and limiting groove for the airbag at the location of the annular airbag. A retaining ring is provided on the outer side of the dual-modal clamping and limiting groove for the airbag. The retaining ring is fixedly connected to the side wall of the fixed ring. The retaining ring includes an upper retaining ring, a lower retaining ring, and a side baffle. The upper retaining ring is located at the top of the side baffle, and the lower retaining ring is located at the bottom of the side baffle and is fixedly connected to the fixed ring. The retaining ring has a hole for connecting the annular airbag to the air source.

[0011] The retaining ring of the present invention adopts an upper retaining ring, a lower retaining ring and a side baffle to limit the shape of the annular airbag after inflation, so as to ensure that the annular airbag can move in the radial direction after inflation.

[0012] Preferably, the bottom of the upper retaining ring and the top of the lower retaining ring are both formed with arc-shaped extrusion surfaces that cooperate with each other in the form of annular airbags.

[0013] The present invention further limits the annular airbag by using an arc-shaped extrusion surface.

[0014] Preferably, the inner side of the clamping block is formed with a clamping concave surface that cooperates with the side wall of the inner rod, and the outer side of the clamping block is formed with a pressing concave surface that cooperates with the shape of the airbag dual-mode clamping limiting groove.

[0015] This invention ensures the firmness of the clamping by fitting the concave surface of the clamping block with the inner rod sidewall. By squeezing the concave surface in conjunction with the dual-modal clamping and limiting groove of the airbag, the annular airbag can be kept in place even when not in use, so that the clamping block always maintains a certain clamping force.

[0016] Preferably, the outer side wall of the inner rod is provided with a toothed ring, the outer side wall of the toothed ring is provided with external teeth, the top of the fixing ring is formed with a retaining ring, and the inner side of the retaining ring is formed with internal teeth that mesh with the external teeth.

[0017] This invention utilizes the cooperation of a toothed ring and a retaining ring. When the inner rod rotates on the outer rod to adjust its angle, the outer teeth on the toothed ring and the inner teeth on the retaining ring mesh tightly. When the inner rod rotates to a specific angle, the retaining ring automatically engages with the corresponding tooth groove on the toothed ring, precisely limiting the inner rod's continued rotation. This effectively avoids the risk of excessive angle adjustment, ensuring that the angle setting matches the surgical positioning requirements. Simultaneously, it prevents the inner rod from reversing after adjustment, avoiding fixation failure due to accidental rotation and providing stable support for surgical procedures. This mechanical meshing structure allows medical personnel to pre-lock the position after each tooth rotation when adjusting the angle, greatly improving the efficiency and safety of surgical positioning.

[0018] Preferably, the control valve is a two-position five-way solenoid valve, with its P port connected to the air source, its A port connected to the input end of the distributor, and its R port connected to the exhaust device; the output end of the distributor is connected to three of the annular airbags, and the annular airbags use one airbag interface.

[0019] This invention uses a two-position five-way solenoid valve to switch the air path direction, thereby achieving synchronous control of single-port inflation and deflation of multiple airbags. When the solenoid valve is energized, ports P and A are connected, and the source inflates the airbag. When the solenoid valve is de-energized, ports A and R are connected, and the airbag gas is discharged from port R.

[0020] Preferably, the distributor includes a main pipe with a main inlet at one end and three outlets at the other end. Each outlet is equipped with a flow equalization mechanism, which includes a hollow pipe, a plug, a compression spring, and a fixing plate. The plug slides within the pipe, forming an air passage between the plug and the pipe. The plug includes a rod with a top block at its tip. The fixing plate is located at the end of the rod and has an air guide hole. The rod slides along the air guide hole. The compression spring is located between the top block and the fixing plate. The compression spring of the middle flow equalization mechanism exerts a greater force on the plug than the compression springs of the two side flow equalization mechanisms.

[0021] This invention introduces air through a main pipe, then the plug core is compressed by thrust. After the airflow passes through, it flows out from the air guide hole to inflate the annular airbag. When there is no air, the pressure of the compression spring closes the pipe. The compression spring of the flow equalization mechanism in the middle exerts a greater force on the plug core than the compression springs of the flow equalization mechanisms on both sides, preventing too much gas from passing through the middle and too little from passing through the sides, ensuring uniform gas distribution at each outlet, and guaranteeing the clamping force of each annular airbag on the inner rod.

[0022] Preferably, the top block is a cone shape that gradually tapers towards the top, and an annular groove is provided on the outer side of the top block. A sealing ring is embedded in the annular groove to ensure sealing performance.

[0023] In summary, the beneficial effects of this invention are as follows:

[0024] 1. This invention achieves fixation of both sides of the pelvis through a left compression fixation component and a right compression fastener. The height can be adjusted by extending and retracting the inner rod of the height adjustment rod within the outer rod. The length can be adjusted by extending and retracting the inner and outer rods of the lateral adjustment rod. The angle can be adjusted by rotating the inner rod within the outer rod. The pneumatic bidirectional locking mechanism at all positions is controlled by a control valve, thus achieving one-button locking and releasing. This allows it to adapt to different body types, ensuring accurate positioning and stability of the patient's lateral decubitus position during orthopedic surgery, protecting nerves and blood vessels from compression, and improving surgical efficiency. Moreover, the fixation after extension and rotation can be completed with the simple press of a switch, which is more convenient than the traditional method of adjusting the rods one by one according to the patient's size.

[0025] 2. This invention utilizes a ring-shaped array of grooves and sliding clamping blocks, along with a ring-shaped airbag fitted onto the outer wall, to clamp and release the inner rod. When the ring-shaped airbag at each position is inflated, the resulting pressure evenly pushes each clamping block to move synchronously radially, clamping the sidewall of the inner rod at each position and achieving fixation in one step. Compared to the traditional method of adjusting and fixing one by one, this significantly improves operational efficiency and shortens surgical preparation time. Moreover, this uniform force-bearing fixation mode avoids problems such as excessive local pressure or unstable fixation, enhances fixation stability, and ensures surgical safety. After deflation, the clamping blocks quickly reset, facilitating disassembly of the device by medical staff and providing convenience for postoperative care. It fully meets the needs of orthopedic lateral decubitus surgery for efficient, precise, and safe pelvic fixation. At the same time, due to the elasticity of the ring-shaped airbag, the clamping blocks also have a certain clamping force when the ring-shaped airbag is not inflated, allowing the inner rod to be pre-fixed after extension and retraction without the need for manual support of the inner rod after adjustment, ensuring the accuracy of adjustment.

[0026] 3. This invention utilizes the cooperation of a toothed ring and a retaining ring to ensure that when the inner rod rotates on the outer rod to adjust its angle, the outer teeth on the toothed ring and the inner teeth on the retaining ring mesh tightly. When the inner rod rotates to a specific angle, the retaining ring automatically engages with the corresponding tooth groove on the toothed ring, precisely limiting the inner rod's continued rotation. This effectively avoids the risk of excessive angle adjustment, ensuring that the angle setting matches the surgical positioning requirements. Simultaneously, it prevents the inner rod from reversing after adjustment, avoiding fixation failure due to accidental rotation and providing stable support for surgical procedures. This mechanical meshing structure allows medical personnel to pre-lock the position after each tooth rotation when adjusting the angle, greatly improving the efficiency and safety of surgical positioning. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the entire invention;

[0028] Figure 2 This is an overall schematic diagram of the pneumatic bidirectional locking mechanism of the present invention;

[0029] Figure 3 This is a cross-sectional schematic diagram of the connection between the pneumatic bidirectional locking mechanism of the present invention and the inner rod and outer rod;

[0030] Figure 4 This is the present invention. Figure 3 An enlarged view of point A;

[0031] Figure 5 This is a schematic diagram of the pneumatic bidirectional locking mechanism of the present invention without the retaining ring;

[0032] Figure 6 This is a schematic diagram of the fixing ring of the present invention;

[0033] Figure 7 This is a schematic diagram of the clamping block of the present invention;

[0034] Figure 8 This is a top view schematic diagram of the pneumatic bidirectional locking mechanism of the present invention connected to the inner rod and the outer rod;

[0035] Figure 9 This is a cross-sectional schematic diagram of the distributor of the present invention;

[0036] Figure 10 This is a cross-sectional schematic diagram of the plug core of the present invention being pushed open.

[0037] 1. Left compression fixing component; 2. Right compression fixing component; 3. Height adjusting rod; 4. Lateral adjusting rod; 5. Connecting rod; 6. Compression plate; 7. Pneumatic bidirectional locking mechanism; 41. Inner rod; 42. Outer rod; 7. Pneumatic bidirectional locking mechanism; 71. Clamping block; 72. Fixing ring; 73. Annular airbag; 721. Slide groove; 731. Airbag dual-modal clamping and limiting groove; 74. Retaining ring; 741. Upper retaining ring; 742. 743. Lower baffle ring; 744. Side baffle plate; 745. Arc-shaped extrusion surface; 716. Clamping concave surface; 717. Extrusion concave surface; 938. Main inlet; 939. Outlet; 900. Flow equalization mechanism; 901. Pipe; 902. Plug core; 903. Compression spring; 904. Fixing plate; 905. Air guide channel; 906. Rod body; 907. Top block; 908. Air guide hole; 91. Annular groove; 92. Sealing ring. Detailed Implementation

[0038] The following specific embodiments are merely illustrative of the present invention and are not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to these embodiments without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present invention.

[0039] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] Example

[0041] like Figure 1As shown, a surgical lateral decubitus pelvic fixator includes a left compression fixation component 1 and a right compression component 2. Both the left compression fixation component 1 and the right compression component 2 include a height adjustment rod 3, a lateral adjustment rod 4, a connecting rod 5, a compression plate 6, a pneumatic bidirectional locking mechanism 7, and a control valve. The height adjustment rod 3, the connecting rod 5, and the lateral adjustment rod 4 each include an inner rod 41 and an outer rod 42. The outer rod 42 is sleeved outside the inner rod 41. The pneumatic bidirectional locking mechanism 7 is provided between the inner rod 41 and the outer rod 42 of the height adjustment rod 3, the connecting rod 5, and the lateral adjustment rod. The outer rod 42 of the connecting rod 5 is vertically fixed to the end of the outer rod of the lateral adjustment rod 4. The compression plate 6 is located at the end of the inner rod 41 of the connecting rod 5. A control valve controls the closing of the pneumatic bidirectional locking mechanism 7 of the left compression fixation component 1, and a control valve controls the closing of the pneumatic bidirectional locking mechanism 7 of the right compression component 2.

[0042] like Figures 2-7 As shown, the pneumatic bidirectional locking mechanism 7 includes a clamping block 71, a fixing ring 72, and an annular airbag 73. The side wall of the fixing ring 72 has a radially arranged groove 721, and several grooves 721 are arranged in a circular array. The clamping block 71 is slidably disposed within the groove 721. The annular airbag 73 is sleeved on the outer side wall of the fixing ring 72 to control the radial reciprocating motion of the clamping block 71. A dual-mode clamping and limiting groove 731 is formed at the location of the annular airbag 73 on the fixing ring 72. A retaining ring 74 is provided on the outer side of the dual-mode clamping and limiting groove 731. The retaining ring 74 and the side wall of the fixing ring 72... The retaining ring 74 is fixedly connected to the wall. It includes an upper retaining ring 741, a lower retaining ring 742, and a side baffle 743. The upper retaining ring 741 is located on the top of the side baffle 743, and the lower retaining ring 742 is located on the bottom of the side baffle 743 and is fixedly connected to the fixing ring 72. The bottom of the upper retaining ring 741 and the top of the lower retaining ring 742 are both formed with arc-shaped extrusion surfaces 744 that cooperate with the annular airbag 73. The inner side of the clamping block 71 is formed with a clamping concave surface 711 that cooperates with the side wall of the inner rod 41, and the outer side of the clamping block 71 is formed with an extrusion concave surface 712 that matches the shape of the dual-mode clamping and limiting groove 731 of the airbag.

[0043] like Figure 8 As shown, the inner rod 41 has a toothed ring 75 on its outer side wall, and the toothed ring 75 has an outer tooth 751 on its outer side wall. The top of the fixing ring 72 is formed with a retaining ring 752, and the inner side of the retaining ring 752 is formed with an inner tooth 753 that meshes with the outer tooth 751.

[0044] like Figures 9-10As shown, the control valve 8 is a two-position five-way solenoid valve. Its P port is connected to the air source, its A port is connected to the input end of the distributor 9, and its R port is connected to the exhaust device. The output end of the distributor 9 is connected to three annular airbags 73. The distributor 9 includes a main pipe 93. One end of the main pipe 93 has a main inlet 931, and the other end has three outlets 932. The outlets are equipped with a flow equalization mechanism 90. The flow equalization mechanism 90 includes a hollow pipe 901, a plug core 902, a compression spring 903, and a fixing plate 904. The plug core 902 is slidably disposed inside the pipe 901. A gas channel 905 is formed between 902 and the pipe 901. The plug core 902 includes a rod body 906. A top block 907 is formed at the top of the rod body 906. A fixing plate 904 is provided at the end of the rod body 906. A gas guide hole 908 is opened on the fixing plate 904. The rod body 906 slides on the gas guide hole 908. A compression spring 903 is provided between the top block 907 and the fixing plate 904. The top block 907 is a cone shape that gradually narrows towards the top. An annular groove 91 is opened on the outer side of the top block 907. A sealing ring 92 is embedded in the annular groove 91.

[0045] Working principle: such as Figures 1-10As shown, during use, the left compression fixing piece 1 and the right compression fixing piece 2 are fixed on both sides of the operating table 100. The patient lies on their side. First, adjust the left compression fixing piece 1. At this time, the annular airbag 73 is in the deflated state. According to the patient's body shape, the height is pre-adjusted manually. The inner rod 41 of the height adjustment rod 3 is extended, retracted, and rotated. During extension and retraction, due to the elasticity of the annular airbag 73, the clamping block 71 of the pneumatic bidirectional locking mechanism 7 can have a certain clamping force, so that the inner rod 41 can be pre-fixed after extension and retraction, without the need for manual support of the inner rod after adjustment. During rotation, through the cooperation of the toothed ring 75 and the retaining ring 752, when the inner rod 41 rotates on the outer rod to adjust the angle, the outer teeth on the toothed ring 75 and the inner teeth on the retaining ring 752 are tightly engaged. When the inner rod 41 rotates to a specific angle, the retaining ring 752 automatically engages with the corresponding tooth groove of the toothed ring, precisely limiting the inner rod 41 from continuing to rotate and effectively avoiding angle. To mitigate the risk of excessive angle adjustment, the angle setting is ensured to match the surgical positioning requirements. Then, the length is adjusted by extending or retracting the inner rod 41 of the lateral adjustment rod 4. Next, the compression plate 6 is rotated. Through the cooperation of the toothed ring 75 and the retaining ring 752, the risk of excessive angle adjustment is effectively avoided. When the left compression fixation piece 1 is adjusted to fit the patient's left side, the control valve opens, and gas flows evenly through the equalization mechanism 90 to each annular airbag to inflate the annular airbag 73. After inflation, the annular airbag 73 evenly pushes each clamping block to move synchronously radially, completing the one-time fixation of the left compression fixation piece 1. The right compression fixation piece 2 is then adjusted in the same way. Compared to the traditional method of adjusting and fixing each piece individually, this significantly improves operational efficiency, shortens surgical preparation time, and allows for adaptation to different body types. It ensures precise positioning and stability of the patient's lateral decubitus position during orthopedic surgery, protects nerves and blood vessels from compression, and improves surgical efficiency.

Claims

1. A surgical lateral decubitus pelvic fixator, characterized in that, It includes a left extrusion fixing member (1) and a right extrusion fixing member (2). The left extrusion fixing member (1) and the right extrusion fixing member (2) each include a height adjusting rod (3), a lateral adjusting rod (4), a connecting rod (5), an extrusion plate (6), a pneumatic bidirectional locking mechanism (7), and a control valve. The height adjusting rod (3), the connecting rod (5), and the lateral adjusting rod (4) each include an inner rod (41) and an outer rod (42). The outer rod (42) is sleeved on the outside of the inner rod (41). The height adjusting rod (3), the connecting rod (5), the connecting rod (6), the right extrusion fixing member (7), the right extrusion fixing member (8), the right extrusion fixing member (9), the right extrusion fixing member (1) and the right extrusion fixing member (2) each include a height adjusting rod (3), a lateral adjusting rod (4), a connecting rod (5), an extrusion plate (6), a pneumatic bidirectional locking mechanism (7), and a control valve. The pneumatic bidirectional locking mechanism (7) is provided between the inner rod (41) and outer rod (42) of the connecting rod (5) and the transverse adjusting rod. The outer rod (42) of the connecting rod (5) is vertically fixed to the end of the outer rod of the transverse adjusting rod (4). The extrusion plate (6) is located at the end of the inner rod (41) of the connecting rod (5). A control valve controls the closing of the pneumatic bidirectional locking mechanism (7) of the left extrusion fixing member (1) and a control valve controls the closing of the pneumatic bidirectional locking mechanism (7) of the right extrusion fixing member (2). The pneumatic bidirectional locking mechanism (7) includes a clamping block (71), a fixing ring (72), and an annular airbag (73). The side wall of the fixing ring (72) is provided with a sliding groove (721) along the radial direction. There are several sliding grooves (721) in an annular array. The clamping block (71) is slidably disposed in the sliding groove (721). The annular airbag (73) is sleeved on the outer side wall of the fixing ring (72) to control the radial reciprocating motion of the clamping block (71). The fixing ring (72) has a dual-mode clamping and limiting groove (731) formed at the position of the annular airbag (73); The outer side of the dual-modal clamping and limiting groove (731) of the airbag is provided with a retaining ring (74). The retaining ring (74) is fixedly connected to the side wall of the fixing ring (72). The retaining ring (74) includes an upper retaining ring (741), a lower retaining ring (742) and a side baffle (743). The upper retaining ring (741) is located at the top of the side baffle (743), and the lower retaining ring (742) is located at the bottom of the side baffle (743) and is fixedly connected to the fixing ring (72). The inner rod (41) has a toothed ring (75) on its outer side wall, and an outer tooth (751) on its outer side wall. The top of the fixing ring (72) is formed with a retaining ring (752), and the inner side of the retaining ring (752) is formed with an inner tooth (753) that meshes with the outer tooth (751).

2. The surgical lateral decubitus pelvic fixator according to claim 1, characterized in that, The bottom of the upper retaining ring (741) and the top of the lower retaining ring (742) are both formed with an arc-shaped extrusion surface (744) that cooperates with the annular airbag (73).

3. The surgical lateral decubitus pelvic fixator according to claim 1, characterized in that, The inner side of the clamping block (71) is formed with a clamping concave surface (711) that cooperates with the side wall of the inner rod (41), and the outer side of the clamping block (71) is formed with a pressing concave surface (712) that matches the shape of the airbag dual-mode clamping limiting groove (731).

4. The surgical lateral decubitus pelvic fixator according to claim 1, characterized in that, The control valve is a two-position five-way solenoid valve, with its P port connected to the air source, its A port connected to the input end of the distributor (9), and its R port connected to the exhaust device; the output end of the distributor (9) is connected to the three annular airbags (73).

5. A surgical lateral decubitus pelvic fixator according to claim 4, characterized in that, The distributor (9) includes a main pipe (93), one end of which has a main inlet (931), and the other end has three outlets (932). A flow equalization mechanism (90) is provided on each outlet. The flow equalization mechanism (90) includes a hollow pipe (901), a plug (902), a compression spring (903), and a fixing plate (904). The plug (902) is slidably disposed within the pipe (901). The plug (902) and the pipe (901) are connected... An air passage (905) is formed between 901 and 902. The plug core (902) includes a rod (906), a top block (907) is formed at the top of the rod (906), a fixing plate (904) is provided at the end of the rod (906), an air passage (908) is provided on the fixing plate (904), the rod (906) slides on the air passage (908), and a compression spring (903) is provided between the top block (907) and the fixing plate (904).

6. A surgical lateral decubitus pelvic fixator according to claim 5, characterized in that... The top block (907) is a cone shape that gradually narrows towards the top. An annular groove (91) is provided on the outer side of the top block (907), and a sealing ring (92) is embedded in the annular groove (91).

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