Thoracic distraction device

Abstract

The invention relates to the technical field of medical equipment, in particular to a thoracotomy distraction device which comprises a base and two distraction plates arranged above the base and further comprises a distraction assembly arranged in the base in a sliding mode and used for adjusting the distraction distance between the two distraction plates and a hydraulic adjusting assembly connected to the base and used for controlling the distraction assembly. An electric adjusting assembly is arranged on the opening assembly and used for adjusting the front-back position of the opening plate. The distance between the left side and the right side of the distraction assembly is achieved through the hydraulic adjusting assembly according to the hydraulic principle, the front-back position of the distraction assembly is achieved through the electric adjusting assembly, then double adjustment of the distraction assembly is achieved, and the technical effect of accurate adjustment of the distraction assembly is achieved. On one hand, compared with manual adjustment, labor is saved through the hydraulic adjustment assembly, and on the other hand, the hydraulic adjustment assembly is more stable compared with electric adjustment.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a chest opening and expansion device. Background Art

[0002] A thoracotomy is a tool commonly used in general thoracic surgery. Its function is to stretch the ribs to a certain extent to facilitate the establishment of a surgical pathway. The traditional thoracotomy has a relatively simple structure and its appearance is similar to a vernier caliper. It consists of a fixed arm, a movable arm and a slide. The movable arm and the fixed arm are used to stretch the ribs.

[0003] With the continuous advancement of medical technology and the increasing expectations of patients for surgical results, the requirements for precision in thoracotomy are also increasing. The chest structure is complex, involving many important organs and blood vessels. During the operation, it is necessary to accurately control the exposure of the surgical field and the degree of opening of the wound to reduce damage to surrounding tissues and improve the success rate of the operation. Therefore, a thoracotomy expansion device that can be precisely adjusted and stably supported has become an urgent need for modern thoracic surgery.

[0004] During long thoracotomy, medical staff need to operate surgical instruments continuously and maintain a high degree of concentration and stability. Traditional distraction methods may have problems such as cumbersome operation and poor stability, which increases the workload and fatigue of medical staff. Therefore, developing a thoracotomy distraction device that is easy to operate and has reasonable ergonomic design can significantly improve the work efficiency of medical staff and reduce discomfort and fatigue during surgery.

[0005] Thoracotomy has a significant impact on the patient's physical and psychological health. An excellent thoracotomy distraction device should be able to provide stable support during the operation to ensure clear exposure of the surgical field, thereby reducing surgical risks and ensuring patient safety. At the same time, by reducing surgical trauma and complications, it also helps promote postoperative recovery and rehabilitation of patients. Therefore, the development of a safe and reliable thoracotomy distraction device is of great significance to improving patients' surgical experience and quality of life after surgery.

[0006] After searching, the Chinese patent with application number 202420760670.2 discloses an adjustable chest opener, including: a chest opener guide column, a chest opener guide frame, a chest opener support and a chest opener screw. A screw groove is provided on the inner side of the chest opener guide column. Compared with the prior art, the utility model has the following beneficial effects: by adding a chest opener guide column, a chest opener knife holder, a chest opener support, a chest opener screw and an auxiliary rod, according to the actual chest opening position and size, the chest opener support is pulled to slide left and right to a suitable position, the adjusting stud is rotated to cooperate with the adjusting threaded hole, so that the pressure plate squeezes the positioning plate to fix the chest opener support, the auxiliary rod is rotated to rotate the chest opener screw, and the two groups of chest opener guide frames are driven to move toward the center and the outside at the same time, so that the position of the chest opener support can be adjusted according to the actual chest opening requirements, by adding the chest opener screw and the auxiliary rod, the locking piece is pulled outward to embed the auxiliary rod into the engaging hole, and the locking column is embedded in the locking hole when the external force is removed, so that the auxiliary rod can be conveniently disassembled and assembled.

[0007] When the above-mentioned thoracotomy device needs to adjust the distance between the thoracotomy brackets, the auxiliary rod needs to be manually shaken to drive the thoracotomy screw to rotate, thereby adjusting the distance between the thoracotomy brackets. The manual operation process is laborious and the adjustment is unstable. Summary of the invention

[0008] The above-mentioned chest opener in the prior art needs to adjust the distance between the chest opener supports manually or electrically, which leads to technical problems of laborious operation and unstable adjustment.

[0009] Technical idea: Based on the problems of the existing technology, the present application provides a thoracotomy expansion device, which can increase the pressure in the hydraulic inner cylinder by repeatedly lifting and pressing the handle manually, thereby driving the hydraulic column to rise, so that the hydraulic column pushes the movable rod to drive the thoracotomy support to move, thereby achieving the technical effect of expanding and fixing the patient's ribs with the expansion plate.

[0010] In order to realize the above technical ideas, the technical solution adopted by the present invention is: The present application provides a chest opening and expansion device, including a base and two expansion plates arranged above the base, and also includes an expansion component slidably arranged in the base for adjusting the expansion distance between the two expansion plates, and a hydraulic adjustment component connected to the base for controlling the expansion component.

[0011] Furthermore, the expansion assembly includes a fixed block, a spring A, a movable rod, a chest opening support and an expansion frame; Fixed blocks are fixedly connected to the inner walls on both sides of the base, and a movable groove is provided in each of the fixed blocks; a spring A is provided in each of the movable grooves, and a movable rod is connected to the end of the spring A; one end of the movable rod is fixedly connected to the spring A, and the other end abuts against the hydraulic adjustment component, and the movable rod is slidably connected to the fixed block and the chest-opening bracket; each of the chest-opening brackets is connected to a support frame, and the support frame is connected to the support plate by bolts.

[0012] In detail, the movable rod is composed of two parts, one part is a cylindrical structure, and the other part is a wedge-shaped block structure; the thoracotomy support is composed of three parts, including two L-shaped supports, a cube and a rectangular block. The cylindrical part of the movable rod is slidably connected to the cube part in the thoracotomy support, and the wedge-shaped block part of the movable rod is clamped with the cube part in the thoracotomy support.

[0013] Furthermore, the hydraulic adjustment assembly includes a hydraulic outer cylinder, a hydraulic inner cylinder, a hydraulic column, a connecting block, a piston cylinder, a piston rod, a handle and a bracket; The bottom of the base is connected to a hydraulic outer cylinder, a hydraulic inner cylinder is sleeved in the hydraulic outer cylinder, and there is a gap between the hydraulic outer cylinder and the hydraulic inner cylinder; a hydraulic column is arranged in the hydraulic inner cylinder, and both sides of the hydraulic column are abutted with the movable rod; a connecting block is connected to the bottom of the hydraulic outer cylinder and the hydraulic inner cylinder, and a liquid inlet channel and a liquid outlet channel are provided in the connecting block; and the end of the connecting block is connected to a piston cylinder and a bracket, a piston rod is arranged in the piston cylinder, a handle is rotatably connected to the piston rod, and the handle is rotatably connected to the bracket; one end of the liquid outlet channel and the liquid inlet channel are both connected to the piston cylinder, and the other end is respectively connected to the hydraulic outer cylinder and the hydraulic inner cylinder, and liquid stop parts are provided in the liquid outlet channel and the liquid inlet channel.

[0014] It should be noted that the hydraulic outer cylinder is filled with hydraulic oil.

[0015] In the above technical solution, the liquid-stopping member includes a liquid-stopping groove and a liquid-stopping ball and a spring B arranged in the liquid-stopping groove. One end of the spring B is fixedly connected to the liquid-stopping groove, and the other end is fixedly connected to the liquid-stopping ball.

[0016] Preferably, the thoracotomy support is provided with an electric adjustment component, and the electric adjustment component is used to adjust the front and rear position of the expansion plate; Specifically, the electric adjustment assembly includes a motor, a screw rod and a slider; Each of the chest-opening brackets is provided with a slide groove, in which a screw rod is arranged, one end of which is rotatably connected to the chest-opening bracket, and the other end is connected to a motor; a slider is threadedly fitted on the screw rod, and both sides of the slider are slidably clamped in the slide groove, and the top of the slider is fixedly connected to the support frame.

[0017] In detail, two sides of the base are connected with clamping plates for clamping the operating table by screws.

[0018] In more detail, a cavity is provided in the base, and two through grooves cooperating with the thoracotomy bracket are provided on the front and rear sides of the base, and a slide rail cooperating with the thoracotomy bracket is provided at the bottom of the base.

[0019] Preferably, a plurality of threaded holes matching with the bolts on the support plate are provided at the end of the support frame, and a silicone pad is provided on the support plate.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention changes the pressure in the piston cylinder by repeatedly pressing the handle manually, so that the hydraulic oil in the hydraulic outer cylinder enters the hydraulic inner cylinder, and then the hydraulic oil pushes the hydraulic column to move upward along the hydraulic inner cylinder. During the upward movement of the hydraulic column, the movable rods on both sides are pushed to move outward. The spring A connected to the movable rod has a buffering technical effect, making the movable rod move more smoothly, and the thoracotomy support is driven to move by the movable rod, thereby achieving the technical effect of supporting and fixing the ribs on both sides of the patient by the expansion board.

[0021] 2. The hydraulic principle is used to adjust the spacing of the opening plates. On the one hand, it is more labor-saving than manual adjustment, and on the other hand, it is more stable than electric adjustment.

[0022] 3. The present invention provides a slide groove on the thoracotomy support, and drives the screw rod to rotate through a motor arranged on the thoracotomy support, and the screw rod and the slider cooperate with each other to realize the slider driving the expansion frame to move forward and backward, thereby realizing the technical effect of flexibly adjusting the front and rear position of the expansion plate according to the position of the thoracotomy.

[0023] 4. The present invention can further adjust the spacing between the two expansion plates by cooperating with the bolts on the expansion plates through the multiple threaded holes provided on the expansion frame, so that during the operation, the distance between the expansion plates can be adjusted to the most appropriate degree, thereby improving the accuracy of the adjustment, thereby improving the success rate of the operation and the comfort of the patient.

[0024] 5. The present invention provides silicone pads on both expansion plates, so that the expansion plates have a certain cushioning effect when contacting the patient's chest ribs, thereby preventing complications caused by damage to the patient's ribs and other tissues, and facilitating the patient's postoperative recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Middle top view; Figure 3 For the present invention Figure 2 Middle bottom view; Figure 4 For the present invention Figure 3 Section view in the AA direction; Figure 5 For the present invention Figure 1 Middle main view; Figure 6 For the present invention Figure 5 Cross-sectional view in the middle BB direction; Figure 7 For the present invention Figure 5 center right view; Figure 8 For the present invention Figure 4 Enlarged view of part A in the middle; Fig. 9 This is a three-dimensional diagram of the thoracotomy support structure of the present invention; In the figure: 1. base; 2. opening plate; 3. opening assembly; 31. fixing block; 32. spring A; 33. movable rod; 34. chest opening bracket; 35. opening bracket; 4. hydraulic adjustment assembly; 41. hydraulic outer cylinder; 42. hydraulic inner cylinder; 43. hydraulic column; 44. connecting block; 441. liquid inlet channel; 442. liquid outlet channel; 45. piston cylinder; 46. piston rod; 47. handle; 48. bracket; 5. liquid stop part; 51. liquid stop groove; 52. liquid stop ball; 53. spring B; 6. electric adjustment assembly; 61. motor; 62. screw rod; 63. slider; 7. card plate; 8. threaded hole; 9. silicone pad. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0028] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "front end", "back end", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0029] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] The inventors have found that the existing sternal retractors cannot be stably fixed on the sternum during use and are prone to falling off or shifting, which may affect the accuracy and safety of the operation. In addition, the sternal retractor needs to be in direct contact with the patient's sternum, which may cause discomfort or damage to the patient, such as pressure, pain, etc.

[0031] Based on the above findings, the present application provides a chest opening and expansion device, comprising a base 1 and two expansion plates 2 arranged above the base 1, and also comprising an expansion component 3 slidably arranged in the base 1 for adjusting the expansion spacing between the two expansion plates 2, and a hydraulic adjustment component 4 connected to the base 1 for controlling the expansion component 3.

[0032] Embodiment 1 Reference Figure 1-9 As shown, the present application provides a chest opening and expansion device, including a base 1 and two expansion plates 2 arranged above the base 1, and also includes an expansion component 3 slidably arranged in the base 1 for adjusting the expansion distance between the two expansion plates 2, and a hydraulic adjustment component 4 connected to the base 1 for controlling the expansion component 3.

[0033] Furthermore, the expansion assembly 3 includes a fixed block 31, a spring A32, a movable rod 33, a chest opening support 34 and an expansion frame 35; The inner walls on both sides of the base 1 are fixedly connected with fixed blocks 31, and each of the fixed blocks 31 is provided with a movable groove; A spring A32 is arranged in each movable groove, and the end of the spring A32 is connected to a movable rod 33. The spring A32 has a buffering effect on the movement of the movable rod 33, so that the support plate 2 can move stably.

[0034] One end of the movable rod 33 is fixedly connected to the spring A32, and the other end is in contact with the hydraulic adjustment assembly 4, and the movable rod 33 is slidably connected to the fixed block 31 and the thoracotomy support 34; Each of the thoracotomy supports 34 is connected to a spreading frame 35 , and the spreading frame 35 is connected to the spreading plate 2 by bolts.

[0035] The base 1 has a cavity therein, and the front and rear sides of the base 1 have two through grooves that cooperate with the chest-opening bracket 34 , and the bottom of the base 1 has a slide rail that cooperates with the chest-opening bracket 34 to slide.

[0036] Furthermore, the hydraulic adjustment assembly 4 includes a hydraulic outer cylinder 41, a hydraulic inner cylinder 42, a hydraulic column 43, a connecting block 44, a piston cylinder 45, a piston rod 46, a handle 47 and a bracket 48; The bottom of the base 1 is connected to a hydraulic outer cylinder 41, and a hydraulic inner cylinder 42 is sleeved inside the hydraulic outer cylinder 41, and there is a gap between the hydraulic outer cylinder 41 and the hydraulic inner cylinder 42; A hydraulic column 43 is disposed in the hydraulic inner cylinder 42, and two sides of the hydraulic column 43 are in abutment with the movable rod 33; In particular, the upper end of the hydraulic column 43 is a wedge-shaped block structure, which cooperates with the end of the movable rod 33.

[0037] The bottom of the hydraulic outer cylinder 41 and the hydraulic inner cylinder 42 are connected with a connecting block 44, and a liquid inlet channel 441 and a liquid outlet channel 442 are provided in the connecting block 44; The end of the connecting block 44 is connected with a piston cylinder 45 and a bracket 48. A piston rod 46 is arranged in the piston cylinder 45. A handle 47 is rotatably connected to the piston rod 46. The handle 47 is rotatably connected to the bracket 48. One end of the liquid outlet channel 442 and the liquid inlet channel 441 are both connected to the piston cylinder 45, and the other ends are respectively connected to the hydraulic outer cylinder 41 and the hydraulic inner cylinder 42, and a liquid stopper 5 is provided in the liquid outlet channel 442 and the liquid inlet channel 441.

[0038] In the above technical solution, the liquid stopping member 5 includes a liquid stopping groove 51 and a liquid stopping ball 52 and a spring B53 arranged in the liquid stopping groove 51. One end of the spring B53 is fixedly connected to the liquid stopping groove 51, and the other end is fixedly connected to the liquid stopping ball 52.

[0039] In the initial state, the piston rod 46 is located at the bottom of the piston cylinder 45, and the bottom of the piston rod 46 blocks the liquid inlet channel 441 and the liquid outlet channel 442. When the handle 47 is manually lifted, the handle 47 drives the piston rod 46 to move upward along the piston cylinder 45, thereby reducing the pressure in the piston cylinder 45, causing the stop ball 52 in the liquid outlet channel 442 to move upward, and the spring B is compressed, thereby allowing the hydraulic oil in the hydraulic outer cylinder 41 to enter the piston cylinder 45 through the liquid outlet channel 442.

[0040] Furthermore, by pressing down the handle 47, the hydraulic oil in the piston cylinder 45 enters the hydraulic inner cylinder 42 through the liquid inlet channel 441. By repeatedly lifting and pressing down the handle 47 several times, the hydraulic oil in the hydraulic inner cylinder 42 pushes the hydraulic column 43 to move upward along the hydraulic inner cylinder 42.

[0041] As the hydraulic column 43 moves upward, the hydraulic column 43 pushes the movable rod 33 to move to both sides. The movement of the movable rod 33 drives the movement of the thoracotomy support 34, and then the expansion frame 35 drives the expansion board 2 to move, thereby adjusting the distance between the two expansion boards 2.

[0042] Embodiment 2 On the basis of the first embodiment, in order to adjust the front and rear positions of the expansion plate 2 , an electric adjustment component 6 is provided on the thoracotomy support 34 .

[0043] Specifically, the electric adjustment assembly 6 includes a motor 61, a screw rod 62 and a slider 63; Furthermore, each of the chest-opening brackets 34 is provided with a slide groove, and a screw rod 62 is arranged in the slide groove. One end of the screw rod 62 is rotatably connected to the chest-opening bracket 34, and the other end is connected to the motor 61; a slider 63 is threadedly engaged on the screw rod 62, and the slider 63 is slidably clamped in the slide groove on both sides, and the top of the slider 63 is fixedly connected to the support frame 35.

[0044] The base 1 is connected to two sides thereof with clamping plates 7 for clamping the operating bed by screws, so that the base 1 can be placed at the bottom of the operating bed and further clamped with the edge of the operating bed by the clamping plates 7, thereby making the overall device more stable.

[0045] Furthermore, the end of the expansion frame 35 is provided with a plurality of threaded holes 8 that cooperate with the bolts on the expansion plate 2. The spacing between the expansion plates 2 can be further adjusted through the cooperation between the threaded holes 8 and the bolts, thereby achieving precise adjustment during the operation; and the expansion plate 2 is provided with a silicone pad 9 to prevent the hard material from damaging the patient's sternum and other tissues.

[0046] Specific application cases: In combination with Example 1 and Example 2, the specific application of a chest expansion device of the present application in thoracotomy for congenital heart disease is specifically described.

[0047] Open-chest surgery for congenital heart disease requires the use of extracorporeal circulation technology, which generally requires opening the chest cavity, then inserting catheters into the aorta, and the superior and inferior vena cava to establish extracorporeal circulation. After the start of extracorporeal circulation, the aorta is blocked, the heart stops beating, and then the heart is opened to repair the heart deformity. After the operation is completed, the heart is sutured, the aorta is opened, the heart is restarted, and the extracorporeal circulation is gradually withdrawn. After the heart beats and returns to normal, the chest cavity is closed and the operation is completed.

[0048] During the operation, the surgical field needs to be exposed to open the wound, so a spreader is used. In the specific use of a thoracotomy spreader device in the present application, the base 1 is partially placed at the bottom of the operating table, and the screws on both sides of the base 1 are further screwed so that the screws drive the clamping plate 7 to be clamped on the edge of the operating table, so that the entire device is fixed on the operating table.

[0049] After thoracotomy, the front and rear positions of the expansion plate 2 are adjusted according to the thoracotomy position of the patient. Specifically, the motor 61 is started to drive the screw rod 62 to rotate, and the threaded cooperation between the screw rod 62 and the slider 63 enables the slider 63 to drive the expansion frame 35 to move forward and backward, thereby realizing the flexible adjustment of the front and rear positions of the expansion plate 2 according to the thoracotomy position. After the expansion plate 2 is adjusted to the appropriate position, the motor 61 is turned off.

[0050] The spacing between the expansion plates 2 is adjusted according to the size of the surgical field to be exposed, and preliminary adjustment is achieved through the threaded holes 8 on the expansion frame 35 .

[0051] In order to achieve further fine adjustment, when the handle 47 is manually lifted, the handle 47 drives the piston rod 46 to move upward along the piston cylinder 45, thereby reducing the pressure in the piston cylinder 45, causing the stop ball 52 in the liquid outlet channel 442 to move upward, and the spring B is compressed, so that the hydraulic oil in the hydraulic outer cylinder 41 enters the piston cylinder 45 through the liquid outlet channel 442.

[0052] Furthermore, by pressing down the handle 47, the hydraulic oil in the piston cylinder 45 enters the hydraulic inner cylinder 42 through the liquid inlet channel 441. By repeatedly lifting and pressing down the handle 47 several times, the hydraulic oil in the hydraulic inner cylinder 42 pushes the hydraulic column 43 to move upward along the hydraulic inner cylinder 42.

[0053] As the hydraulic column 43 moves upward, the hydraulic column 43 pushes the movable rod 33 to move to both sides. The movement of the movable rod 33 drives the movement of the thoracotomy support 34, and then the expansion frame 35 drives the expansion plate 2 to move, thereby adjusting the distance between the two expansion plates 2, and then supporting and fixing the patient's sternum on both sides, making it easier for doctors to perform surgery.

[0054] After the operation, the patient's vital signs, including heart rate, blood pressure, respiratory rate and blood oxygen saturation, as well as wound healing, need to be closely monitored, and the patient should take antibiotics to prevent infection, anticoagulants or antiplatelet drugs to prevent thrombosis, and cardiotonic drugs or diuretics to help restore heart function as prescribed by the doctor.

[0055] It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A chest opening and stretching device, comprising a base (1) and two stretching plates (2) arranged above the base (1), characterized in that: It also comprises a spreading component (3) slidably arranged in the base (1) for adjusting the spreading distance between the two spreading plates (2), and a hydraulic adjustment component (4) connected to the base (1) for controlling the spreading component (3).

2. A chest opening and stretching device according to claim 1, characterized in that: The expansion assembly (3) comprises a fixed block (31), a spring A (32), a movable rod (33), a chest opening support (34) and an expansion frame (35); Fixed blocks (31) are fixedly connected to the inner walls on both sides of the base (1), and each of the fixed blocks (31) is provided with a movable groove; A spring A (32) is disposed in each movable groove, and an end of the spring A (32) is connected to a movable rod (33); One end of the movable rod (33) is fixedly connected to the spring A (32), and the other end is in contact with the hydraulic adjustment assembly (4), and the movable rod (33) is slidably connected to the fixed block (31) and the thoracotomy support (34); Each of the thoracotomy supports (34) is connected to a spreading frame (35), and the spreading frame (35) is connected to the spreading plate (2) via bolts.

3. A chest opening and expansion device according to claim 2, characterized in that: The hydraulic adjustment assembly (4) comprises a hydraulic outer cylinder (41), a hydraulic inner cylinder (42), a hydraulic column (43), a connecting block (44), a piston cylinder (45), a piston rod (46), a handle (47) and a bracket (48); The bottom of the base (1) is connected to a hydraulic outer cylinder (41), a hydraulic inner cylinder (42) is sleeved inside the hydraulic outer cylinder (41), and a gap is provided between the hydraulic outer cylinder (41) and the hydraulic inner cylinder (42); A hydraulic column (43) is arranged in the hydraulic inner cylinder (42), and two sides of the hydraulic column (43) are in abutment with the movable rod (33); A connecting block (44) is connected to the bottom of the hydraulic outer cylinder (41) and the hydraulic inner cylinder (42), and a liquid inlet channel (441) and a liquid outlet channel (442) are provided in the connecting block (44); The end of the connecting block (44) is connected to a piston cylinder (45) and a bracket (48); a piston rod (46) is arranged in the piston cylinder (45); a handle (47) is rotatably connected to the piston rod (46); and the handle (47) is rotatably connected to the bracket (48); One end of the liquid outlet channel (442) and the liquid inlet channel (441) are both in communication with the piston cylinder (45), and the other ends are respectively in communication with the hydraulic outer cylinder (41) and the hydraulic inner cylinder (42), and liquid stoppers (5) are provided in the liquid outlet channel (442) and the liquid inlet channel (441).

4. A chest opening and stretching device according to claim 3, characterized in that: The liquid-stopping member (5) comprises a liquid-stopping groove (51), a liquid-stopping ball (52) and a spring B (53) arranged in the liquid-stopping groove (51); one end of the spring B (53) is fixedly connected to the liquid-stopping groove (51), and the other end is fixedly connected to the liquid-stopping ball (52).

5. A chest opening and stretching device according to claim 4, characterized in that: The chest opening support (34) is provided with an electric adjustment component (6), and the electric adjustment component (6) is used to adjust the front and rear position of the opening plate (2); The electric adjustment component (6) comprises a motor (61), a screw rod (62) and a slider (63); Each of the chest-opening brackets (34) is provided with a slide groove, a screw rod (62) is arranged in the slide groove, one end of the screw rod (62) is rotatably connected to the chest-opening bracket (34), and the other end is connected to a motor (61); The threaded portion of the screw rod (62) is provided with a slider (63), both sides of the slider (63) are slidably engaged in slide grooves, and the top of the slider (63) is fixedly connected to the support frame (35).

6. A chest opening and stretching device according to claim 5, characterized in that: Clamping plates (7) for clamping an operating table are connected to both sides of the base (1) via screws.

7. A chest opening and expansion device according to claim 6, characterized in that: A cavity is provided in the base (1), and two through grooves cooperating with the chest opening bracket (34) are provided on both the front and rear sides of the base (1), and a slide rail cooperating with the chest opening bracket (34) is provided at the bottom of the base (1).

8. A chest opening and stretching device according to claim 7, characterized in that: The end of the support frame (35) is provided with a plurality of threaded holes (8) that match the bolts on the support plate (2), and the support plate (2) is provided with a silicone pad (9).

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