A cardiothoracic surgical auxiliary distraction device

Abstract

The application discloses a kind of heart and lung surgery auxiliary distraction device, belong to medical instrument technical field, including gear assembly, connecting rod assembly, shell and locking part, gear assembly is located in the center inside shell and is connected to the connecting rod assembly arranged symmetrically, gear assembly is by knob, gear plate and pinion constitute multi-stage meshing transmission structure, connecting rod assembly is realized motion conversion by push rod, slider, lever and slide rod, shell integrates accurate guide slot, locking part uses the mechanical buckle type structure of reset spring drive. When using, rotate knob is driven by gear transmission to drive both sides connecting rod assembly synchronous action, realize the symmetric, stable distraction of surgical incision, reach preset amplitude after locking part automatic clamping locking, when unlocking, pull pull column can be quickly recovered, solve the problems of insufficient adjustment accuracy, unreliable locking, poor symmetric distraction, inconvenient operation and difficult cleaning and disinfection of existing mechanical distraction device.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically referring to a cardiothoracic surgical auxiliary opening device. Background Technology

[0002] In cardiothoracic surgery, auxiliary retraction devices are needed to expose the surgical area to ensure the operation is safe. Their performance directly affects the clarity of the surgical field, ease of operation, and patient safety. Commonly used retraction devices in clinical practice include mechanical, hydraulic, and pneumatic types. Among them, mechanical devices are the most widely used in primary hospitals and routine surgeries due to their simple structure and lack of need for an additional power source. They are mostly driven by screws, racks, or linkages, with the retraction arm opened by a knob or handle.

[0003] Existing mechanical retraction devices have significant drawbacks: First, insufficient adjustment precision makes it difficult to accurately control the retraction amplitude, easily leading to tissue tearing; second, unreliable locking, with friction locks prone to loosening, affecting the stability of the surgical field; third, poor symmetrical retraction, with both retraction arms difficult to synchronize, exacerbating patient trauma; fourth, inconvenient operation, with complex transmission requiring significant driving force, easily subject to interference in limited surgical space; and fifth, difficult cleaning and disinfection, with contaminants easily remaining in the suture structure, increasing the risk of cross-infection. Furthermore, different surgical types and patient body types have vastly different requirements for incision retraction, and existing devices have poor adaptability, necessitating the preparation of various specifications, increasing procurement costs and preoperative preparation time. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a cardiothoracic surgical auxiliary opening device, which effectively solves the above problems.

[0005] The technical solution adopted by the present invention is as follows: The present invention proposes a cardiothoracic surgical auxiliary opening device, including a gear assembly, a connecting rod assembly and a housing. The gear assembly is located at the center inside the housing, and the connecting rod assembly is symmetrically located on both sides inside the housing. The gear assembly is connected to the connecting rod assembly. The gear assembly includes a knob, a gear plate and a pinion. The knob is located at the center of the housing and the gear plate. The pinion is attached to the gear plate, and the gear plate rotates at the center of the housing.

[0006] Furthermore, one end of the knob is provided with a knob gear, the center of the gear plate is provided with a gear ring, the edge of the gear plate is provided with connecting rod fixing posts symmetrically, the pinion is meshed with the gear ring, and the knob gear is meshed with the pinion.

[0007] Preferably, a multi-stage meshing transmission of "knob gear - pinion - gear plate and gear ring" is adopted, which has small meshing gap and stable transmission ratio, and can precisely control the rotation angle of the gear plate, thereby achieving fine adjustment of the opening amplitude and solving the problem of insufficient adjustment accuracy of existing devices. The gear plate is symmetrically equipped with connecting rod fixing columns on the edge, which can synchronously drive the connecting rod components on both sides to ensure the consistency of movement of the opening structure on both sides, achieve symmetrical opening, and reduce patient trauma. The gear transmission has a force amplification effect. Compared with the existing screw and rack transmission, it can drive the opening action without a large driving force, which is suitable for operation scenarios with limited surgical space and improves the convenience of operation.

[0008] Furthermore, the linkage assembly includes a push rod, a slider, a lever, a slide bar, and a spreading rod. One end of the push rod is mounted on the linkage fixing post, and the other end of the push rod is mounted on the slider. The center of the lever rotates on the slider. The top of the lever is connected to the slide bar, the bottom of the lever is mounted on the housing, and the spreading rod is located at the end of the slide bar.

[0009] Furthermore, one end of the slider is provided with a lever rotating column, the other end of the slider is provided with a lever groove, the center of the lever groove is provided with a lever column, the center of the lever is rotatably mounted on the lever rotating column, and the two ends of the lever are symmetrically provided with column grooves.

[0010] Furthermore, one end of the slide rod is provided with a lever post, the other end of the slide rod is provided with a connecting part, the top wall of the slide rod is provided with a limiting groove, the bottom of the spreading rod is provided on the connecting part, and the top of the spreading rod is provided with a spreading clamp.

[0011] Preferably, the rotational motion of the toothed plate is converted into the linear spreading motion of the slide rod through a multi-stage linkage transmission of "push rod-slider-pulling rod-slide rod". The motion trajectory is precise and the action is smooth, avoiding tissue tearing caused by instantaneous impact. The lever-type lever structure can amplify the stroke, and with the precise adjustment of the gear assembly, it can adapt to different spreading amplitudes to meet the incision requirements of different surgical types and patient body shapes, reducing the preparation cost of multi-specification devices. The top of the spreading rod is equipped with a spreading clamp to increase the contact area with the tissue, reduce local pressure, and avoid tissue damage caused by single-point force.

[0012] Furthermore, the housing includes a casing and a plate, the plate being fastened to the casing, the casing having a toothed groove at its center, a push rod groove at the top of the toothed groove, a knob hole at the center of the toothed groove, the toothed plate rotating within the toothed groove, the push rod located within the push rod groove, and the knob located within the knob hole.

[0013] Furthermore, the housing is symmetrically provided with slider grooves and slide bar grooves on both sides, the slide bar groove is located above the slider groove, the slider slides in the slider groove, and the slide bar slides in the slide bar groove.

[0014] Furthermore, the top of the housing is provided with locking rod grooves on both sides, the locking rod grooves are connected to the sliding rod grooves, and a second lever post is provided below the sliding rod groove. The post groove at one end of the lever is provided on the second lever post, and the post groove at the other end of the lever is provided on the first lever post.

[0015] Furthermore, the machine plate is symmetrically provided with lever slots and gear posts on both sides, the lever is located in the lever slot, the pinion is located on the gear post, and the housing also includes a locking rod, which is located in the locking rod slot.

[0016] Furthermore, the top of the locking rod is provided with a pull post, the bottom of the locking rod is provided with a spring plate, the spring plate is provided with a return spring, the end of the return spring is attached to the top wall of the locking rod groove, and the bottom of the spring plate is provided with a limiting boss, which is located in the limiting groove.

[0017] Preferably, a mechanical locking structure is adopted in which a "reset spring drives the limiting boss to engage with the sliding rod limiting groove". Compared with the existing friction locking, the locking stability is high, which can effectively prevent the expansion range from loosening due to tissue tension or external force collision during the operation, ensuring the stability of the surgical field. When unlocking, only the pulling column needs to be pulled upward to overcome the spring force and disengage from the limiting groove. No additional operation is required when locking. The reset spring automatically drives the locking, which is suitable for the needs of rapid operation during the operation. After unlocking, it does not affect the retraction and reset of the sliding rod, ensuring that the device can be smoothly retrieved after the operation and improving the operation efficiency.

[0018] The beneficial effects achieved by the present invention using the above structure are as follows: 1. Precise adjustment and symmetrical expansion: The multi-stage gear meshing transmission and symmetrical linkage structure can precisely control the expansion range, and the expansion action on both sides is highly synchronized, avoiding tissue tearing. It can adapt to different surgical incisions and patient body shape needs, and reduce the preparation cost of multi-specification devices.

[0019] 2. Reliable locking and stable field of vision: The mechanical snap-lock design uses a return spring to drive the limiting boss and the sliding rod limiting groove to precisely match, ensuring a firm and secure lock that effectively resists intraoperative tissue tension and external force interference, and ensures a continuous and stable surgical field of vision.

[0020] 3. Convenient operation, labor-saving and efficient: The gear transmission has labor-saving characteristics and compact integrated structure, resulting in low driving force during operation and minimal space occupation, avoiding interference with surgical procedures; the locking / unlocking steps are simple, and the opening and retraction actions are smooth, improving surgical efficiency. Attached Figure Description

[0021] Figure 1 This is a perspective view of the internal structure of a cardiothoracic surgical auxiliary retraction device proposed in this invention; Figure 2 This is a front view of a cardiothoracic surgical auxiliary retraction device proposed in this invention; Figure 3 for Figure 2 A cross-sectional view along section line AA; Figure 4 for Figure 3 A cross-sectional view along the cutting line BB; Figure 5 for Figure 3 A cross-sectional view along the section line CC; Figure 6 This is a schematic diagram of the sliding rod of a cardiothoracic surgical auxiliary expansion device proposed in this invention; Figure 7 This is a schematic diagram of the housing of a cardiothoracic surgical auxiliary expansion device proposed in this invention; Figure 8 This is a schematic diagram of the locking rod of a cardiothoracic surgical auxiliary opening device proposed in this invention.

[0022] Among them, 1. Gear assembly, 11. Knob, 111. Knob gear, 12. Gear plate, 121. Gear ring, 122. Connecting rod fixing post, 13. Pinion, 2. Connecting rod assembly, 21. Push rod, 22. Slider, 221. Toggle lever rotating post, 222. Toggle lever groove, 223. Toggle lever post, 23. Toggle lever, 231. Post groove, 24. Slide rod, 241. Toggle lever post one, 242. Limiting groove, 243. Connecting part, 25. 1. Spreading rod, 251. Spreading clamp, 3. Housing, 31. Machine housing, 311. Gear plate groove, 317. Push rod groove, 312. Slider groove, 313. Sliding rod groove, 314. Knob hole, 315. Locking rod groove, 316. Toggle rod post 2, 32. Machine plate, 321. Toggle rod groove, 322. Gear post, 33. Locking rod, 331. Pulling post, 332. Spring plate, 333. Return spring, 334. Limiting boss.

[0023] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0025] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] like Figures 1-8 As shown, the present invention proposes a cardiothoracic surgical auxiliary opening device, including a gear assembly 1, a connecting rod assembly 2, and a housing 3. The gear assembly 1 is located at the center inside the housing 3, and the connecting rod assembly 2 is symmetrically located on both sides inside the housing 3. The gear assembly 1 is connected to the connecting rod assembly 2. The gear assembly 1 includes a knob 11, a gear plate 12, and a pinion 13. The knob 11 is located at the center of the housing 3 and the gear plate 12, and the pinion 13 is attached to the gear plate 12. The gear plate 12 rotates at the center of the housing 3.

[0027] A knob 11 is provided with a knob gear 111 at one end, a toothed ring 121 is provided at the center of the toothed plate 12, and a connecting rod fixing post 122 is provided symmetrically on the edge of the toothed plate 12. The pinion 13 is meshed with the toothed ring 121, and the knob gear 111 is meshed with the pinion 13.

[0028] The linkage assembly 2 includes a push rod 21, a slider 22, a lever 23, a slide bar 24, and a spreading rod 25. One end of the push rod 21 is mounted on the linkage fixing post 122, and the other end of the push rod 21 is mounted on the slider 22. The center of the lever 23 rotates on the slider 22. The top of the lever 23 is connected to the slide bar 24, and the bottom of the lever 23 is mounted on the housing 3. The spreading rod 25 is located at the end of the slide bar 24.

[0029] One end of the slider 22 is provided with a lever rotating column 221, and the other end of the slider 22 is provided with a lever groove 222. A lever column 223 is provided at the center of the lever groove 222. The center of the lever 23 is rotatably mounted on the lever rotating column 221, and the two ends of the lever 23 are symmetrically provided with column grooves 231.

[0030] One end of the slide rod 24 is provided with a lever post 241, the other end of the slide rod 24 is provided with a connecting part 243, the top wall of the slide rod 24 is provided with a limiting groove 242, the bottom of the spreading rod 25 is provided on the connecting part 243, and the top of the spreading rod 25 is provided with a spreading clamping plate 251.

[0031] The housing 3 includes a housing 31 and a plate 32. The plate 32 is fastened to the housing 31. The housing 31 has a toothed groove 311 at its center. The top of the toothed groove 311 has a push rod groove 317. The center of the toothed groove 311 has a knob hole 314. The toothed plate 12 rotates in the toothed groove 311. The push rod 21 is located in the push rod groove 317. The knob 11 is located in the knob hole 314.

[0032] The housing 31 has symmetrical slider grooves 312 and slider grooves 313 on both sides. The slider groove 313 is located above the slider groove 312. The slider 22 slides in the slider groove 312 and the slider 24 slides in the slider groove 313.

[0033] Locking rod grooves 315 are provided on both sides of the top of the housing 31. The locking rod grooves 315 are connected to the sliding rod groove 313. A second lever post 316 is provided below the sliding block groove 312. The post groove 231 at one end of the lever 23 is provided on the second lever post 316, and the post groove 231 at the other end of the lever 23 is provided on the first lever post 241. The first lever post 241 and the second lever post 316 are respectively slidably hinged to the corresponding post groove 231.

[0034] The machine plate 32 is symmetrically provided with lever grooves 321 and gear post 322 on both sides. The lever 23 is located in the lever groove 321, and the pinion 13 is located on the gear post 322. The housing 3 also includes a locking rod 33, which is located in the locking rod groove 315.

[0035] The top of the locking rod 33 is provided with a pull post 331, the bottom of the locking rod 33 is provided with a spring plate 332, the spring plate 332 is provided with a return spring 333, the end of the return spring 333 is attached to the top wall of the locking rod groove 315, the bottom of the spring plate 332 is provided with a limiting boss 334, and the limiting boss 334 is provided in the limiting groove 242.

[0036] In actual use, medical staff hold the casing 3 and move the device to the surgical area so that the expansion splint 251 at the top of the expansion rod 25 fits against the tissues on both sides of the cardiothoracic surgical incision, ensuring that the contact area between the expansion splint 251 and the tissue is uniform and avoiding excessive local pressure.

[0037] Slowly rotate the knob 11, which drives the knob gear 111 at the end to rotate. The knob gear 111 meshes with and drives the pinion 13 to rotate around the gear post 322 of the machine plate 32. The pinion 13 further meshes with the tooth ring 121 of the tooth plate 12, causing the tooth plate 12 to rotate in the tooth plate groove 311. When the tooth plate 12 rotates, the connecting rod fixing post 122 on its edge moves in a circular motion, thereby pushing the push rod 21 to swing horizontally in the push rod groove 317. The other end of the push rod 21 pushes the slider 22 to slide along the slider groove 312 away from the center of the housing.

[0038] When the slider 22 slides, it drives the lever 23 to rotate around the lever post 316 of the housing 31. The end of the lever 23 away from the lever post 316 cooperates with the lever post 241 of the slide rod 24 through the column groove 231, pushing the slide rod 24 to slide outward along the slide rod groove 313. The slide rod 24 drives the end of the spreading rod 25 to unfold outward in sync, and the spreading clamp 251 gradually spreads the tissues on both sides of the surgical incision outward.

[0039] When the expansion reaches the required surgical field of vision, stop rotating knob 11. At this time, the reset spring 333 pushes the locking rod 33 downward along the locking rod groove 315 under its own elastic force. The limiting boss 334 at the bottom of the spring plate 332 is precisely engaged in the limiting groove 242 of the slide rod 24, realizing the mechanical locking of the slide rod 24. This prevents changes in the expansion range due to external force collision or tissue tension during the operation, ensuring stable surgical operation. According to the surgical field of vision requirements, control the rotation angle of knob 11 to adjust the expansion range and adapt to different incision sizes.

[0040] After the surgery, medical staff pull the pull post 331 at the top of the locking rod 33 upwards, causing the locking rod 33 to move upwards against the elastic force of the return spring 333, so that the limiting boss 334 disengages from the limiting groove 242 of the slide rod 24, thus releasing the locking state. The knob 11 is slowly rotated in the opposite direction, causing the knob gear 111, pinion 13 and toothed plate 12 to rotate in the opposite direction. The connecting rod fixing post 122 of the toothed plate 12 pulls the push rod 21 to reset, which in turn causes the slider 22 to slide along the slider groove 312 towards the center of the housing 3. When the slider 22 resets, the lever 23 rotates in the opposite direction, pulling the slide rod 24 inwards along the slide groove 313. The opening rod 25 retracts simultaneously, opening the splint 251 from the surgical incision tissue. After the opening rod 25 is completely retracted, the device is removed from the surgical area for postoperative cleaning and disinfection, in preparation for the next use.

[0041] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

[0043] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A cardiothoracic surgical auxiliary retraction device, characterized in that: It includes a gear assembly (1), a connecting rod assembly (2) and a housing (3). The gear assembly (1) is located at the center inside the housing (3), and the connecting rod assembly (2) is symmetrically located on both sides inside the housing (3). The gear assembly (1) is connected to the connecting rod assembly (2). The gear assembly (1) includes a knob (11), a gear plate (12) and a pinion (13). The knob (11) is located at the center of the housing (3) and the gear plate (12). The pinion (13) is attached to the gear plate (12). The gear plate (12) rotates at the center of the housing (3). The connecting rod assembly (2) includes a push rod (21), a slider (22), a lever (23), a slide rod (24), and a spreading rod (25). One end of the push rod (21) is mounted on the connecting rod fixing post (122), and the other end of the push rod (21) is mounted on the slider (22). The center of the lever (23) rotates on the slider (22). The top of the lever (23) is connected to the slide rod (24), and the bottom of the lever (23) is mounted on the housing (3). The spreading rod (25) is located at the end of the slide rod (24).

2. The cardiothoracic surgical auxiliary retraction device according to claim 1, characterized in that: The knob (11) has a knob gear (111) at one end, the toothed plate (12) has a toothed ring (121) at the center, the toothed plate (12) has connecting rod fixing posts (122) symmetrically arranged on the edge of the toothed plate (12), the pinion (13) meshes with the toothed ring (121), and the knob gear (111) meshes with the pinion (13).

3. The cardiothoracic surgical auxiliary retraction device according to claim 2, characterized in that: One end of the slider (22) is provided with a lever rotating column (221), and the other end of the slider (22) is provided with a lever groove (222). The center of the lever groove (222) is provided with a lever column (223). The center of the lever (23) is rotatably mounted on the lever rotating column (221), and the two ends of the lever (23) are symmetrically provided with column grooves (231).

4. The cardiothoracic surgical auxiliary retraction device according to claim 3, characterized in that: One end of the slide rod (24) is provided with a lever post (241), the other end of the slide rod (24) is provided with a connecting part (243), the top wall of the slide rod (24) is provided with a limiting groove (242), the bottom of the spreading rod (25) is provided on the connecting part (243), and the top of the spreading rod (25) is provided with a spreading clamp (251).

5. The cardiothoracic surgical auxiliary retraction device according to claim 4, characterized in that: The housing (3) includes a housing (31) and a plate (32). The plate (32) is fastened to the housing (31). The housing (31) has a toothed groove (311) at its center. The toothed groove (311) has a push rod groove (317) at its top. The toothed groove (311) has a knob hole (314) at its center. The toothed plate (12) rotates in the toothed groove (311). The push rod (21) is located in the push rod groove (317). The knob (11) is located in the knob hole (314).

6. The cardiothoracic surgical auxiliary retraction device according to claim 5, characterized in that: The housing (31) is symmetrically provided with a slider groove (312) and a slider groove (313) on both sides. The slider groove (313) is located above the slider groove (312). The slider (22) slides in the slider groove (312) and the slider (24) slides in the slider groove (313).

7. The cardiothoracic surgical auxiliary retraction device according to claim 6, characterized in that: The top of the housing (31) is provided with locking rod grooves (315) on both sides. The locking rod grooves (315) are connected to the sliding rod groove (313). The slider groove (312) is provided with a second lever post (316) below it. The post groove (231) at one end of the lever (23) is located on the second lever post (316), and the post groove (231) at the other end of the lever (23) is located on the first lever post (241).

8. The cardiothoracic surgical auxiliary retraction device according to claim 7, characterized in that: The machine plate (32) is symmetrically provided with lever grooves (321) and gear post (322) on both sides. The lever (23) is located in the lever groove (321), and the pinion (13) is located on the gear post (322). The housing (3) also includes a locking rod (33), which is located in the locking rod groove (315).

9. A cardiothoracic surgical auxiliary retraction device according to claim 8, characterized in that: The locking rod (33) has a pull post (331) at the top and a spring plate (332) at the bottom. The spring plate (332) has a return spring (333) on it. The end of the return spring (333) is attached to the top wall of the locking rod groove (315). The spring plate (332) has a limiting boss (334) at the bottom and the limiting boss (334) is located in the limiting groove (242).

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