Thoracic cavity opening fixator

Abstract

The utility model relates to the technical field of medical equipment, in particular to a chest distraction fixator which comprises a dental plate and a pair of distraction arms, at least one distraction arm is installed on the dental plate in a sliding mode, each distraction arm is provided with a distraction plate, the distraction arm sliding relative to the dental plate is provided with a rotating handle, and the rotating handle is connected with the dental plate. The device further comprises an auxiliary supporting device, the auxiliary supporting device comprises a rotating sleeve and adjusting arms screwed at the two ends of the rotating sleeve in a threaded mode, the two adjusting arms and the rotating sleeve are opposite in thread screwing direction, connecting blocks are arranged at the outward ends of the two adjusting arms correspondingly, and abutting blocks are hinged to the connecting blocks correspondingly. The two abutting blocks can abut against the inner walls of the outward ends of the two opening arms respectively. The thoracic cavity distraction fixator can keep the distraction degree of the outward ends of the two distraction arms, the operation view field is guaranteed, and meanwhile adjustment is convenient.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, specifically to a chest cavity expansion and fixation device. Background Technology

[0002] Thoracic tuberculosis is the most common type of spinal tuberculosis. Currently, the commonly used surgical approach is the lateral anterior approach. However, this approach requires cutting ribs or transverse processes, resulting in significant surgical trauma, prolonged operation time, and substantial blood loss. Furthermore, it cannot adequately expose the anterior and middle columns of the affected vertebra, limiting the surgical field and making complete lesion removal difficult, leading to a high recurrence rate. Therefore, the industry is increasingly seeking new alternative surgical methods, such as the modified intercostal thoracic approach. This approach enters the pleural cavity through the intercostal space, eliminating the need to cut ribs or transverse processes, thus offering advantages such as less surgical trauma, shorter operation time, and clearer surgical field exposure.

[0003] Both of the aforementioned surgical methods require a thoracic retractor to open the ribs and skin. The most common thoracic retractor consists of a dental plate and a pair of retractor arms. At least one retractor arm is slidably mounted on the dental plate, and each retractor arm has a retractor plate. A rotating handle is located on the retractor arm that slides relative to the dental plate, used to adjust the sliding position of the retractor arm on the dental plate. The outward ends of the two retractor arms in this type of thoracic retractor are easily deformed due to the compression from the pleural cavity and ribs. This reduces the opening distance between the outward ends of the two retractor arms, affecting the surgical field. To address this issue, patent CN202011405709.1 – A thoracic surgical retractor – discloses a method that uses a fixing plate to support the retractor plate, preventing the plate from contracting under stress. This allows the patient's thoracic cavity to be opened to the accurate position, ensuring that the surgeon's field of vision and the patient's subsequent recovery are not affected. Although the adjustment device can extend and retract, the structure cannot slide relative to the sliding arm, making position adjustment inconvenient. In addition, the design of this structure itself also has the problem of obstructing the surgical field in certain areas. Utility Model Content

[0004] In order to overcome one of the shortcomings of the prior art, the purpose of this utility model is to provide a chest cavity opening and fixation device. This chest cavity opening and fixation device can maintain the opening degree of the two opening arms at the outward end, ensure the surgical field of vision, and is easy to adjust.

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

[0006] A chest cavity expander and fixator includes a dental plate and a pair of expander arms. At least one of the expander arms is slidably mounted on the dental plate. Each expander arm is provided with an expander plate. A rotating handle is provided on the expander arm that slides relative to the dental plate. The device also includes an auxiliary support device, which includes a rotating sleeve and adjusting arms threaded onto both ends of the rotating sleeve. The threads of the two adjusting arms and the rotating sleeve are opposite in direction. A connecting block is provided at the outward end of each of the two adjusting arms. A pressing block is hinged to each connecting block. The two pressing blocks can respectively abut against the inner wall of the outward end of the two expander arms.

[0007] Furthermore, each of the pressing blocks has a hinge shaft on the middle of one side, and the two connecting blocks are rotatably connected to the hinge shafts on the corresponding pressing blocks.

[0008] Furthermore, each of the pressing blocks has a slot on the side opposite to the hinge shaft for accommodating the spreading arm.

[0009] Furthermore, each of the pressing blocks has an extension at both ends of the slot opening, which abuts against the inner wall of the corresponding spreading arm.

[0010] Furthermore, the connecting block includes a connecting head and a rotating head, with at least one connecting unit block provided between the connecting head and the rotating head. The end of the adjusting arm away from the rotating sleeve is fitted onto the outward end of the connecting head, and the end of the rotating head away from the connecting head is rotatably mounted on the hinge shaft.

[0011] Furthermore, each of the pressing blocks has a support portion on one side, and the outward end of the support portion has a curved portion, with the curved portions on the two pressing blocks curving in opposite directions.

[0012] Furthermore, the outer wall of the rotating sleeve is provided with several raised textures or anti-slip grooves along the circumferential direction.

[0013] Furthermore, the cross-section of the rotating sleeve gradually decreases from the middle to both ends.

[0014] Furthermore, a reinforcing rib is provided between the connecting block and the corresponding connecting adjusting arm.

[0015] Furthermore, the connecting block and the corresponding connecting adjusting arm are arranged in an L-shape, and the cross-sectional area of ​​the connecting block gradually decreases from one end of the adjusting arm to the other end.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This utility model presents an improved chest cavity expansion and fixation device based on existing devices. An auxiliary support device is designed to support the distance between the outward ends of the two expansion arms, ensuring the overall expansion range and surgical field of view. The extension of the two adjustable arms can be adjusted synchronously by rotating the rotating sleeve, making the adjustment simple and convenient. Connecting blocks and pressure blocks are designed on the outward ends of the two adjustable arms, creating a U-shape for the entire auxiliary support device. This facilitates placing the main body of the auxiliary support device outside the body, reducing the portion entering the chest cavity and improving overall surgical safety. Furthermore, the entire assembly of the two adjustable arms and the two connecting blocks can rotate relative to the two pressure blocks. This design allows for adjustment of the swinging position of the auxiliary support device, enabling medical personnel to place it according to actual needs and improving usability. The two pressure blocks can abut against the inner walls of the outward ends of the two expansion arms, a movable design that allows for adjustment of the expansion position according to actual usage requirements.

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the structure of an embodiment of the present utility model. Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the auxiliary support device in an embodiment of this utility model.

[0022] Explanation of icon numbers:

[0023] Tooth plate 10, spreading arm 20, spreading plate 21, rotating handle 30, auxiliary support device 40, rotating sleeve 41, adjusting arm 42, connecting block 43, pressing block 44, hinge shaft 45, slot 46, extension part 47, spreading part 48, bending part 49, reinforcing rib 4a, anti-slip groove 4b. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0025] Reference Figures 1 to 3The illustrated chest expansion and fixation device includes a dental plate 10 and a pair of expansion arms 20. At least one of the expansion arms 20 is slidably mounted on the dental plate 10. Each expansion arm 20 is provided with an expansion plate 21. A rotating handle 30 is provided on the expansion arm 20 that slides relative to the dental plate 10. The device also includes an auxiliary support device 40, which includes a rotating sleeve 41 and adjusting arms 42 threadedly mounted on both ends of the rotating sleeve 41. The threads of the two adjusting arms 42 and the rotating sleeve 41 are opposite in direction. Each of the two adjusting arms 42 is provided with a connecting block 43 at its outward end. Each connecting block 43 is hinged with a pressing block 44. The two pressing blocks 44 can respectively abut against the inner wall of the outward end of the two expansion arms 20.

[0026] The toothed plate 10, the rotating handle 30, and the pair of spreading arms 20 constitute the most conventional chest cavity expander and fixator structure. The specific operation will not be detailed here; please refer to patent CN 205107782U - Chest Cavity Expander. Furthermore, the cross-sectional area of ​​the rotating sleeve 41 is larger than that of the adjusting arm 42, which improves the overall stability of the structure. In some embodiments, the thread direction between the two adjusting arms 42 and the rotating sleeve 41 is not limited. At the same time, rotating nuts that mate with the external threads of the adjusting arms 42 are respectively provided at both ends of the rotating sleeve 41, allowing adjustment of the extension length of the adjusting arm 42 within the rotating sleeve 41.

[0027] This thoracic cavity expander and fixator is an improvement upon existing expander and fixator designs. An auxiliary support device 40 is incorporated to support the distance between the outward ends of the two expander arms 20, ensuring the overall expansion range and surgical field of vision. The extension of the two adjusting arms 42 can be adjusted synchronously by rotating the rotating sleeve 41, a simple and convenient adjustment method. Connecting blocks 43 and pressure blocks 44 are designed on the outward ends of the two adjusting arms 42. This design makes the entire auxiliary support device 40 U-shaped, facilitating its placement outside the body and reducing the portion entering the thoracic cavity, thus improving surgical safety. Furthermore, the entire assembly of the two adjusting arms 42 and the two connecting blocks 43 can rotate relative to the two pressure blocks 44, allowing adjustment of the swinging position of the auxiliary support device 40. This design facilitates placement by medical personnel according to actual needs, improving ease of use. The two pressing blocks 44 can respectively abut against the inner wall of the outward end of the two spreading arms 20. This design is a movable design, which is conducive to adjusting the spreading position according to actual use needs.

[0028] See Figures 1 to 3In this application, the auxiliary support device 40 is generally U-shaped. This structural design ensures that the auxiliary support device 40 is not coplanar with the plane formed by the two spreading arms 20 and the dental plate 10, making it easier for the user to adjust the position of the auxiliary support device 40 according to their needs. Therefore, in order to prevent the auxiliary support device 40 from occupying space inside the thoracic cavity and obstructing the surgical field of view during use, in one embodiment of this application, the connecting block 43 and the correspondingly connected adjusting arm 42 are arranged in an L-shape. The cross-sectional area of ​​the connecting block 43 gradually decreases along one end of the adjusting arm 42 towards the other. This structural design can prevent the connecting block 43 from deforming under stress.

[0029] In the above-described improved embodiment, to ensure that the structure consisting of the connecting block 43, the adjusting arm 42, and the rotating sleeve 41 is not located inside the thoracic cavity incision, a hinge shaft 45 is provided on the middle of one side of each of the pressure blocks 44. The two connecting blocks 43 are rotatably connected to the hinge shaft 45 on the corresponding pressure block 44. This design allows the structure consisting of the connecting block 43, the adjusting arm 42, and the rotating sleeve 41 to be placed outside the thoracic cavity incision, while also being able to swing relative to the two pressure blocks 44. This can be understood as also being able to swing relative to the structure consisting of the entire dental plate 10, the rotating handle 30, and the pair of spreading arms 20. This design facilitates the staff in determining the position of the structure consisting of the connecting block 43, the adjusting arm 42, and the rotating sleeve 41 according to their needs, avoiding obstruction of the surgical field of vision.

[0030] In order to prevent the connecting block 43 and the corresponding connecting adjusting arm 42 from bending and deforming under stress, in the improved embodiment of this application, a reinforcing rib 4a is provided between the connecting block 43 and the corresponding connecting adjusting arm 42.

[0031] Furthermore, in actual use, to prevent each pressing block 44 from becoming loose from the corresponding hinge shaft 45, in an improved embodiment of this application, each pressing block 44 is provided with a slot 46 for accommodating the spreading arm 20 on the side opposite to the hinge shaft 45. This design allows the entire pressing block 44 to be locked onto the outer wall of the spreading arm 20. At the same time, since the hinge shaft 45 is located in the middle of the pressing block 44, it is not easy for it to become loose due to lateral deviation.

[0032] In one embodiment of this application, to enable the pressing block 44 to support a larger area of ​​the spreading arm 20 and avoid single-point support, thus ensuring the stability of the support, each pressing block 44 has an extension 47 at both ends of the opening of the slot 46, which abuts against the inner wall of the corresponding spreading arm 20. The specific length of the extension 47 is designed according to requirements, and the cross-sectional area of ​​the extension 47 gradually decreases outward, thereby increasing its bending strength.

[0033] See Figures 1 to 2 In one embodiment of this application, in order to open the chest cavity wound, each of the pressing blocks 44 is provided with a spreading portion 48 on one side, and a bending portion 49 is provided at the outward end of the spreading portion 48, with the bending portions 49 on the two pressing blocks 44 bending in opposite directions. In fact, the structural design of the spreading portion 48 is similar to that of the spreading plate 21, and will not be described in detail here.

[0034] In one embodiment of this application, to facilitate the operator in rotating the rotating sleeve 41 to adjust the extension and retraction of the two adjusting arms 42, the outer wall of the rotating sleeve 41 is provided with several raised textures or anti-slip grooves 4b along the circumferential direction. Furthermore, to improve the strength of the structure formed by the rotating sleeve 41 and the two adjusting arms 42, the cross-section of the rotating sleeve 41 gradually decreases from the middle to both ends, thus the rotating sleeve 41 is generally spindle-shaped.

[0035] See Figure 3 To accommodate users of different body types and ages, the length of the connecting block 43 needs to be adjusted. Therefore, in one embodiment of this application, the connecting block 43 includes a connecting head and a rotating head. At least one connecting unit block is provided between the connecting head and the rotating head. The end of the adjusting arm 42 away from the rotating sleeve 41 is fitted onto the outward end of the connecting head. The end of the rotating head away from the connecting head is rotatably mounted on the hinge shaft 45. This design allows operators to increase the number of connecting unit blocks as needed, thereby increasing the length of the connecting block 43. The connecting head is L-shaped, with one end inserted into the adjusting arm 42. The connection between the connecting unit block and the connecting head and rotating head can be quickly connected via a convex end and groove engagement. The connecting unit blocks can be set to different lengths, or multiple connecting unit blocks can be spliced ​​together. The engagement method is also a convex end and groove engagement for quick connection. To prevent loosening, the sidewalls of the convex end and groove are equipped with elastic locking structures or elastic card structures and recesses for mutual locking.

[0036] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A chest cavity expander and fixator, comprising a dental plate and a pair of expander arms, at least one of the expander arms being slidably mounted on the dental plate, each of the expander arms being provided with an expander plate, and a rotating handle being provided on the expander arm sliding relative to the dental plate, characterized in that, It also includes an auxiliary support device, which includes a rotating sleeve and adjusting arms threaded onto both ends of the rotating sleeve. The two adjusting arms and the rotating sleeve have opposite thread directions. Each of the two adjusting arms has a connecting block at its outer end. Each connecting block is hinged with a pressing block. The two pressing blocks can respectively abut against the inner wall of the outer end of the two spreading arms.

2. The chest cavity expander and fixator according to claim 1, characterized in that: Each of the pressing blocks has a hinge shaft on the middle of one side, and the two connecting blocks are rotatably connected to the hinge shafts on the corresponding pressing blocks.

3. The chest cavity expander and fixator according to claim 2, characterized in that: Each of the pressing blocks has a slot on the side opposite to the hinge shaft for accommodating the spreading arm.

4. The chest cavity expander and fixator according to claim 3, characterized in that: Each of the pressing blocks has an extension at both ends of the slot opening, which abuts against the inner wall of the corresponding spreading arm.

5. A chest cavity expander and fixator according to claim 2, characterized in that: The connecting block includes a connecting head and a rotating head, and at least one connecting unit block is provided between the connecting head and the rotating head. The end of the adjusting arm away from the rotating sleeve is fitted onto the outward end of the connecting head, and the end of the rotating head away from the connecting head is rotatably mounted on the hinge shaft.

6. The chest cavity expander and fixator according to claim 1, characterized in that: Each of the pressing blocks has a support portion on one side, and a curved portion is provided at the outward end of the support portion. The curved portions on the two pressing blocks are curved in opposite directions.

7. A chest cavity expander and fixator according to any one of claims 1-6, characterized in that: The outer wall of the rotating sleeve is provided with several raised textures or anti-slip grooves along the circumference.

8. A chest cavity expander and fixator according to any one of claims 1-6, characterized in that: The cross-section of the rotating sleeve gradually decreases from the middle to both ends.

9. A chest cavity expander and fixator according to any one of claims 1-6, characterized in that: A reinforcing rib is provided between the connecting block and the corresponding connecting adjusting arm.

10. A chest cavity expander and fixator according to claim 1, characterized in that: The connecting block and the corresponding connecting adjusting arm are arranged in an L-shape, and the cross-sectional area of ​​the connecting block gradually decreases from one end of the adjusting arm to the other end.

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