A retractor for axillary sentinel lymph node biopsy

Abstract

The present invention discloses a retractor for axillary sentinel lymph node biopsy, which relates to the technical field of medical devices. It includes a central connecting plate, one end of the central connecting plate is fixedly connected to a driving front rod, the other side of the driving front rod is fixedly connected to a spreading bent rod, two ends of the spreading bent rod are fixedly connected to mounting blocks, and one end of the mounting block is fixedly clamped with a spreading side retractor. The present invention effectively improves the spreading area of ​​the sentinel lymph node wound by medical staff, effectively improves the surgical field of view, increases the operating space, and the surgeon can complete the operation alone. At the same time, the flexible structural design of the elastic connecting plate and the lateral spreading retractor effectively prevents additional lacerations caused by rigid pulling on the skin edge when the wound is longitudinally spread, further improving the safety of the use of the retractor.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, in particular to a retractor for axillary sentinel lymph node biopsy. Background Art

[0002] Sentinel lymph nodes are special lymph nodes in the regional lymph nodes that drain the primary tumor. They are the first lymph nodes that the primary tumor must pass through for lymph node metastasis. Sentinel lymph nodes serve as a barrier to prevent tumor cells from spreading from the lymphatic tract, and their clinical significance has been recognized by people. In the process of sentinel lymph node biopsy on patients, corresponding retractors are needed. For this purpose, a Chinese patent discloses an improved medical retractor with application number 202222673350.7. The patent uses a meshing connection between a gear and a rack, so that the rotation of the gear can push the rack to move parallel, so that the connecting plate can move horizontally toward the limit seat under the limit of the limit bar, so that the connecting plate drives the insulating retractor to move its position, thereby facilitating the adjustment of the degree of traction of the insulating retractor on the skin, making the retractor assembly more flexible in traction of the skin;

[0003] However, due to the lack of corresponding auxiliary structures during the use of retractors, medical staff can only open the wound into a diamond structure when opening a living wound, even if they use two retractors in combination to pull the wound edge. At the same time, due to the special location of the sentinel lymph node and the presence of a large amount of fat under the patient's skin, the field of view of the wound opened by the retractor is limited, and the situation inside the wound cannot be effectively observed, which reduces the convenience of using the retractor. Summary of the Invention

[0004] The present invention provides a retractor for axillary sentinel lymph node biopsy, which can effectively solve the problem proposed in the above-mentioned background technology that the retractor lacks a corresponding auxiliary structure during use, resulting in medical personnel only being able to stretch the wound into a diamond structure when stretching the wound of a living person even if two retractors are used in combination to pull the wound edge. At the same time, due to the special location of the sentinel lymph node and the presence of a large amount of fat under the patient's skin, the field of view of the wound stretched by the retractor is limited, and the situation inside the wound cannot be effectively observed, thereby reducing the convenience of using the retractor.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a retractor for axillary sentinel lymph node biopsy, comprising a central connecting plate, one end of which is fixedly connected to a driving front rod, and the other side of which is fixedly connected to a spreading bent rod;

[0006] The end of the support bent rod is provided with a multi-angle support mechanism;

[0007] The multi-angle support mechanism includes a mounting block;

[0008] The ends of the two expanded curved rods are fixedly connected with mounting blocks, and one end of the mounting block is fixedly connected with an expanded side hook. A limited arc groove is provided in the middle of the inner side of the expanded side hook, and a guide flat groove is transversely provided on one side of the expanded side hook at the middle position of the limited arc groove;

[0009] The other end of the mounting block is fixedly connected with a stretched main draw hook, and one side of the stretched main draw hook is fixedly connected to a limited arc block at a position corresponding to the inner position of the limited arc groove, and a limited flat groove is provided through the middle of one side of the limited arc block, and a central mounting shaft is rotatably installed in the middle of the inner side of the limited arc block, and a connecting side plate is fixedly installed in the middle of one side of the central mounting shaft corresponding to the inner position of the limited arc groove, a splicing arc groove is provided through the middle of the side surface of the connecting side plate, and a splicing hexagonal groove is provided in the middle of the top of the central mounting shaft;

[0010] The inside of the spliced ​​hexagonal groove corresponds to the top position of the central mounting axis, and a spliced ​​hexagonal column is installed through the center of the top of the spliced ​​hexagonal column. A mounting arc block is fixedly connected to the middle of the top of the spliced ​​arc groove. A connecting bent plate is fixedly connected to one side of the mounting arc block corresponding to the top position of the spliced ​​arc groove. The bottom end of the connecting bent plate is fixedly connected to the spliced ​​arc strip at the inner position of the spliced ​​arc groove.

[0011] Preferably, an elastic connecting plate is fixedly connected to the middle of one side of the spliced ​​arc strip, and a lateral stretching hook is fixedly connected to the end of the elastic connecting plate. An extended flat rod is fixedly connected to the other side of the mounting arc block, and the ends of the extended flat rod are symmetrically fixedly connected to the elastic arc plate, and the ends of the elastic arc plate are fixedly connected to the driving end rod, and a limiting small column is fixedly connected to the middle of the bottom end of the driving end rod, and a limiting small hole is provided through the middle position of the top surface of the stretching bent rod.

[0012] Preferably, the top surface of the mounting block is flush with the top surfaces of the corresponding side hooks and main hooks, and the top and bottom corners of the side hooks and main hooks are both provided with arc chamfers.

[0013] Preferably, the two side surfaces of the connecting side plate are tightly fitted with the inner walls of the guiding flat groove and the limiting flat groove respectively, and the end surface of the connecting side plate is flush with the side surfaces of the expanded side hook and the expanded main hook.

[0014] Preferably, the outer side of the spliced ​​hexagonal column and the inner wall of the spliced ​​hexagonal groove are tightly slidably fitted, the outer arc surface of the spliced ​​arc strip and the inner arc surface of the spliced ​​arc groove are tightly slidably fitted, and the end face of the spliced ​​arc strip and the end face of the spliced ​​arc groove are flush with each other.

[0015] Preferably, anti-slip grooves are evenly provided on both sides of the driving end rod, the bottom surface of the extended flat rod and the top surface of the corresponding stretched bent rod are slidingly fitted with each other, the limiting small column and the limiting small hole correspond to each other, and the limiting small column and the limiting small hole fit together.

[0016] Preferably, a tail limiting support mechanism is provided on the outer side of the driving front rod;

[0017] The tail limit support mechanism includes a drive end ring;

[0018] The ends of the two driving front rods are fixedly connected to the driving end rings, and the middle positions of the side surfaces of the two driving front rods are penetrated with mounting arc holes, the middle position of the top of one mounting arc hole is penetrated with a limit clamping hole, and the middle position of the bottom surface of the other mounting arc hole is penetrated with a mounting clamping hole;

[0019] A limiting elastic ring is sleeved between the two driving end rings, a connecting small ring is sleeved on the middle part of one side of the limiting elastic ring, a limiting arc piece is slidably provided at the end of the connecting small ring corresponding to the inner position of the mounting arc hole, one end of the bottom surface of the limiting arc piece is fixedly connected to the mounting circular piece corresponding to the inner position of the mounting card hole, and the other end of the top surface of the limiting arc piece is evenly and equidistantly fixedly connected to the limiting circular piece, and a compression rubber is bonded to the inner side of the limiting arc piece near one end of the limiting circular piece;

[0020] A splicing bottom bolt is movably connected to the bottom end of the inner side of one of the central connecting plates, and a splicing cover ring is threadedly installed on the outer side of the splicing bottom bolt at a position corresponding to the top end of the other central connecting plate, and a compression rubber ring is embedded and bonded to the bottom edge of the splicing cover ring.

[0021] Preferably, the corners of the installation arc hole are provided with arc chamfers, the top and bottom surfaces of the limiting arc piece are tightly slidably fitted with the inner wall of the installation arc hole, and deformation arc grooves are opened through both ends of the inner side of the limiting arc piece.

[0022] Preferably, the mounting disc and the mounting hole are correspondingly engaged with each other, and the limiting disc and the limiting hole are correspondingly engaged with each other.

[0023] Preferably, the edge of the top surface of the splicing cover ring is provided with anti-slip grooves at equal intervals along the circumferential direction, and the bottom surface of the compression rubber ring is tightly slidably fitted with the top surface of the corresponding center connecting plate.

[0024] Compared with the prior art, the present invention has the following beneficial effects: the structure of the present invention is scientific and reasonable, and it is safe and convenient to use:

[0025] 1. A multi-angle expansion support mechanism is provided. Through the mutual coordination between the various components within the multi-angle expansion support mechanism, the use process of the retractor is optimized. The combined design of the expansion side retractor, the expansion main retractor, and the lateral expansion retractor effectively increases the expansion area of ​​the sentinel lymph node wound for medical staff, and changes the expansion shape of the wound from a diamond to a triangle, effectively improving the medical staff's observation field of view and the observation effect of the internal tissue condition of the wound. At the same time, the flexible structural design of the elastic connecting plate and the lateral expansion retractor effectively prevents the lateral expansion retractor from rigidly pulling the skin edge when longitudinally expanding the wound, causing additional lacerations, further improving the safety of the retractor.

[0026] At the same time, by splicing the arc grooves and the hexagonal grooves and the arc bars and the hexagonal columns, the smaller side retractor hooks and the main retractor hooks can be inserted into the wound to expand the wound to a certain size, and then the elastic connecting plate and the side retractor hooks are connected to the main retractor hooks for secondary expansion, and the expansion shape of the wound can be adjusted at the same time, which effectively improves the convenience of using the retractor hooks and enables the side retractor hooks and the main retractor hooks to be used separately, thereby effectively expanding the scope of application of the retractor hooks.

[0027] In addition, through the cooperation between the limiting arc groove and the limiting arc block, the fitting accuracy between the expanded side hook and the expanded main hook is effectively improved, and through the mutual cooperation between the guide flat groove and the limiting flat groove, the central mounting shaft and the connecting side plate are stored and limited, thereby effectively preventing the expanded side hook and the expanded main hook from shaking randomly during the closed use process, and the extended flat rod and the driving end rod are connected by the elastic arc plate, so that the driving end rod can be elastically deflected while driving the extended flat rod to move horizontally, which effectively improves the stability and smoothness of the hook during use.

[0028] 2. A tail limit support mechanism is provided. Through the mutual cooperation between the various components inside the tail limit support mechanism, the use and fixing process of the retractor is optimized. Through the mutual cooperation between the limit card hole, the installation card hole and the various components on the limit arc piece, the working form of the driving front rod and the opening bent rod can be continuously limited, which optimizes the operation process of the retractor and prevents the medical staff from exerting continuous force on their hands during the entire opening process and causing fatigue, further improving the convenience of using the retractor. At the same time, the splicing structure design of the limit arc piece allows medical staff to remove the limit arc piece when only a short-term opening is needed, thereby expanding the use and scope of the retractor;

[0029] At the same time, the components are limited by the limiting elastic ring and the connecting small ring to prevent the hook from being lost during use. The detachable structural design of the spliced ​​bottom bolt and the spliced ​​cover ring allows the two center connecting plates to be disassembled as needed during use, so that the corresponding expanded side draw hooks and expanded main draw hooks connected to the expanded bent rods can be separated and used separately, effectively expanding the shape change range of the draw hook and improving the use effect of the draw hook.

[0030] To sum up, the use and adjustment process of the pull hook is optimized through the mutual cooperation between the internal components of the multi-angle support mechanism and the tail limit support mechanism. Through the detachable structural design of the spliced ​​bottom bolt and the spliced ​​cover ring, the side pull hook and the main pull hook can be separated and used separately, or combined for coordinated use. Moreover, through the spliced ​​structural design of the elastic connecting plate and the lateral pull hook, the accessories of the pull hook can be quickly added or removed according to needs during use to ensure that it can be used in complex and changeable environments, further improving the convenience and adaptability of the use of the hook. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0032] In the attached figure:

[0033] Figure 1 It is a structural schematic diagram of the present invention;

[0034] Figure 2 This is a schematic diagram of the structure of the main pull hook installation of the present invention;

[0035] Figure 3 It is a schematic structural diagram of the top of the present invention;

[0036] Figure 4 This invention Figure 3 Cross-sectional view at point A;

[0037] Figure 5 This is a schematic structural diagram of the multi-angle support mechanism of the present invention;

[0038] Figure 6 This is a schematic structural diagram of the installation of the elastic connecting plate of the present invention;

[0039] Figure 7 This is a schematic structural diagram of the connection side panel installation of the present invention;

[0040] Figure 8 This is a schematic diagram of the structure of the side pull hook installation of the present invention;

[0041] Figure 9It is a structural schematic diagram of the tail limit support mechanism of the present invention;

[0042] Figure 10 This is a schematic diagram of the structure of the small connecting ring installation of the present invention;

[0043] Numbers in the figure: 1, center connecting plate; 2, driving front rod; 3, support bending rod;

[0044] 4. Multi-angle support mechanism; 401. Mounting block; 402. Side extension hook; 403. Limiting arc groove; 404. Guide flat groove; 405. Main extension hook; 406. Limiting arc block; 407. Limiting flat groove; 408. Center mounting shaft; 409. Connecting side panels; 410. Splicing arc groove; 411. Splicing hexagonal groove; 412. Splicing hexagonal column; 413. Installing arc block; 414. Connecting bent plate; 415. Splicing arc strip; 416. Elastic connecting plate; 417. Lateral extension hook; 418. Extending flat rod; 419. Elastic arc plate; 420. Driving end rod; 421. Limiting small column; 422. Limiting small hole;

[0045] 5. Tail limit support mechanism; 501. Drive end ring; 502. Mounting arc hole; 503. Limiting card hole; 504. Mounting card hole; 505. Limiting elastic ring; 506. Limiting arc piece; 507. Mounting disc; 508. Limiting disc; 509. Compression rubber; 510. Splicing bottom bolt; 511. Splicing cover ring; 512. Tightening rubber ring; 513. Connecting small ring. DETAILED DESCRIPTION

[0046] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0047] Example: Figure 1-10 As shown, the present invention provides a technical solution, a retractor for axillary sentinel lymph node biopsy, comprising a central connecting plate 1, one end of the central connecting plate 1 is fixedly connected to a driving front rod 2, and the other side of the driving front rod 2 is fixedly connected to a spreading bent rod 3;

[0048] The end of the support rod 3 is provided with a multi-angle support mechanism 4;

[0049] The multi-angle expansion support mechanism 4 includes a mounting block 401, an expansion side hook 402, a limiting arc groove 403, a guide flat groove 404, an expansion main hook 405, a limiting arc block 406, a limiting flat groove 407, a central mounting shaft 408, a connecting side plate 409, a spliced ​​arc groove 410, a spliced ​​hexagonal groove 411, a spliced ​​hexagonal column 412, an installation arc block 413, a connecting bent plate 414, a spliced ​​arc bar 415, an elastic connecting plate 416, a lateral expansion hook 417, an extended flat rod 418, an elastic arc plate 419, a driving end rod 420, a limiting small column 421 and a limiting small hole 422;

[0050] The ends of the two opening bent rods 3 are fixedly connected to the mounting blocks 401, and the end of one mounting block 401 is fixedly connected to the opening side hook 402. A limiting arc groove 403 is provided in the middle of the inner side of the opening side hook 402, and a guide flat groove 404 is horizontally provided on one side of the opening side hook 402 at the middle position corresponding to the limiting arc groove 403;

[0051] Another mounting block 401 is fixedly connected to the end thereof with a main opening hook 405. The top surface of the mounting block 401 is flush with the top surfaces of the corresponding side opening hooks 402 and main opening hooks 405. The top and bottom corners of the side opening hooks 402 and main opening hooks 405 are both provided with arc chamfers.

[0052] A limited arc block 406 is fixedly connected to the inner position of the limiting arc groove 403 on one side of the main opening hook 405, and a limited flat groove 407 is provided through the middle of one side of the limiting arc block 406. A central installation shaft 408 is rotatably installed in the middle of the inner side of the limiting arc block 406. A connecting side plate 409 is fixedly installed on the middle of one side of the central installation shaft 408 at the inner position corresponding to the limiting arc groove 403. The two side surfaces of the connecting side plate 409 are tightly fitted with the inner walls of the guide flat groove 404 and the limiting flat groove 407 respectively, and the end surface of the connecting side plate 409 is flush with the side surfaces of the opening side hook 402 and the opening main opening hook 405;

[0053] A splicing arc groove 410 is opened through the middle of the side of the connecting side plate 409, and a splicing hexagonal groove 411 is opened in the middle of the top of the central installation shaft 408;

[0054] A splicing hexagonal column 412 is installed at the top position of the central installation axis 408 corresponding to the inside of the splicing hexagonal groove 411, and a mounting arc block 413 is fixedly connected to the middle of the top of the splicing hexagonal column 412. A connecting bent plate 414 is fixedly connected to one side of the mounting arc block 413 corresponding to the top position of the splicing arc groove 410. A splicing arc bar 415 is fixedly connected to the bottom end of the connecting bent plate 414 corresponding to the inner position of the splicing arc groove 410. The outer side of the splicing hexagonal column 412 and the inner wall of the splicing hexagonal groove 411 are tightly slidably fitted, and the outer arc surface of the splicing arc bar 415 and the inner arc surface of the splicing arc groove 410 are tightly slidably fitted, and the end face of the splicing arc bar 415 and the end face of the splicing arc groove 410 are flush with each other.

[0055] The middle part of one side of the spliced ​​arc strip 415 is fixedly connected with an elastic connecting plate 416, and the end of the elastic connecting plate 416 is fixedly connected with a lateral stretching hook 417, and the other side of the arc block 413 is fixedly connected with an extended flat rod 418, and the end of the extended flat rod 418 is symmetrically fixedly connected with an elastic arc plate 419, and the end of the elastic arc plate 419 is fixedly connected with a driving end rod 420, and the middle part of the bottom end of the driving end rod 420 is fixedly connected with a limited column 421, and a limited hole 422 is provided through the middle position of the top surface of the stretched bent rod 3, and anti-slip grooves are evenly provided on both sides of the driving end rod 420. The bottom surface of the extended flat rod 418 and the corresponding top surface of the stretched bent rod 3 slide together, and the limiting column 421 corresponds to the limiting hole 422, and the limiting column 421 and the limiting hole 422 correspond to each other. The holes 422 fit together, and the use of the retractor is optimized through the mutual cooperation between the components inside the multi-angle expansion support mechanism 4. The combined design of the expansion side retractor 402, the expansion main retractor 405 and the lateral expansion retractor 417 effectively increases the expansion area of ​​the sentinel lymph node wound for medical staff, and changes the expansion shape of the wound from a rhombus to a triangle, effectively improving the medical staff's observation field of view and improving the observation effect of the internal tissue condition of the wound. At the same time, the flexible structural design of the elastic connecting plate 416 and the lateral expansion retractor 417 effectively prevents the lateral expansion retractor 417 from rigidly pulling the skin edge when longitudinally expanding the wound, thereby preventing additional lacerations, thereby further improving the safety of the retractor.

[0056] At the same time, by splicing the arc groove 410 and the hexagonal groove 411 and the arc strip 415 and the hexagonal column 412, the smaller side opening hook 402 and the main opening hook 405 can be inserted into the wound to open the wound to a certain size, and then the elastic connecting plate 416 and the side opening hook 417 are snapped onto the main opening hook 405 for secondary opening, and the opening shape of the wound can be adjusted at the same time, which effectively improves the convenience of using the hook and enables the side opening hook 402 and the main opening hook 405 to be used separately in combination, effectively improving the application range of the hook;

[0057] The cooperation between the limiting arc groove 403 and the limiting arc block 406 effectively improves the fitting accuracy between the open side retractor 402 and the open main retractor 405, and the mutual cooperation between the guiding flat groove 404 and the limiting flat groove 407 limits the storage of the central mounting shaft 408 and the connecting side plate 409, thereby effectively preventing the open side retractor 402 and the open main retractor 405 from shaking randomly during the closing and use process. The elastic arc plate 419 connects the extended flat rod 418 and the driving end rod 420, so that the driving end rod 420 can be elastically deflected while driving the extended flat rod 418 to move horizontally, thereby effectively improving the stability and smoothness of the retractor during use.

[0058] A tail limit support mechanism 5 is provided on the outside of the driving front rod 2;

[0059] The tail limiting support mechanism 5 includes a driving end ring 501, an installation arc hole 502, a limiting clamping hole 503, an installation clamping hole 504, a limiting elastic ring 505, a limiting arc piece 506, an installation disc 507, a limiting disc 508, a compression rubber piece 509, a splicing bottom bolt 510, a splicing cover ring 511, a compression rubber ring 512 and a connecting small ring 513;

[0060] The ends of the two driving front rods 2 are fixedly connected to the driving end ring 501. The middle position of the side of the two driving front rods 2 is penetrated by a mounting arc hole 502. The middle position of the top of one mounting arc hole 502 is penetrated by a limit clamping hole 503. The middle position of the bottom surface of the other mounting arc hole 502 is penetrated by a mounting clamping hole 504.

[0061] A limiting elastic ring 505 is sleeved between the two driving end rings 501, and a connecting small ring 513 is sleeved in the middle of one side of the limiting elastic ring 505. The end of the connecting small ring 513 is slidably provided with a limiting arc piece 506 at a position corresponding to the inner position of the mounting arc hole 502. The corners of the mounting arc hole 502 are provided with arc chamfers. The top and bottom surfaces of the limiting arc piece 506 are tightly slidably fitted with the inner wall of the mounting arc hole 502, and deformation arc grooves are opened at both ends of the inner side of the limiting arc piece 506.

[0062] One end of the bottom surface of the limiting arc piece 506 is fixedly connected to a mounting disc 507 at a position corresponding to the inner position of the mounting card hole 504. The other end of the top surface of the limiting arc piece 506 is evenly and evenly fixedly connected to the limiting disc 508. A compressed rubber piece 509 is adhered to the inner side of the limiting arc piece 506 near one end of the limiting disc 508. The mounting disc 507 and the mounting card hole 504 are correspondingly engaged with each other, and the limiting disc 508 and the limiting card hole 503 are correspondingly engaged with each other.

[0063] The bottom end of the inner side of a center connecting plate 1 is movably connected with a splicing bottom bolt 510, and a splicing cover ring 511 is installed by threading at the top position of the other center connecting plate 1 on the outside of the splicing bottom bolt 510. A compression rubber ring 512 is embedded and bonded to the bottom edge of the splicing cover ring 511, and anti-slip grooves are equidistantly provided on the top edge of the splicing cover ring 511 along the circumferential direction. The bottom surface of the compression rubber ring 512 is tightly slidably fitted with the top surface of the corresponding center connecting plate 1, and the mutual cooperation between the various components inside the tail limit support mechanism 5 optimizes the use and fixing process of the draw hook Through the mutual cooperation between the limiting card hole 503, the installation card hole 504 and the components on the limiting arc piece 506, the working form of the driving front rod 2 and the opening bent rod 3 can be continuously limited, which optimizes the operation process of the retractor and prevents the medical staff from being fatigued by the continuous force of the hands during the entire opening process, further improving the convenience of using the retractor. At the same time, the splicing structure design of the limiting arc piece 506 enables the medical staff to remove the limiting arc piece 506 when only a short-term opening is needed, thereby expanding the use and scope of the retractor.

[0064] At the same time, each component is limited by the limiting elastic ring 505 and the connecting small ring 513 to prevent the hook from being lost during use, and the detachable structural design of the splicing bottom bolt 510 and the splicing cover ring 511 allows the two central connecting plates 1 to be disassembled as needed during use, so that the corresponding expanding side hooks 402 and expanding main hooks 405 connected to the expanding bent rods 3 can be separated and used separately, effectively expanding the morphological change range of the hook and improving the use effect of the hook.

[0065] Working principle and use process of the present invention: In actual application, when the retractor needs to be used in combination to pull and stretch the patient's wound, the retractor needs to be adjusted and assembled first. After the splicing bottom bolt 510 is inserted through the center of the two center connecting plates 1, the splicing cover ring 511 is installed on the top of the center connecting plate 1 by threading, and the bottom of the splicing cover ring 511 is elastically isolated by the compression rubber ring 512 to ensure that the two center connecting plates 1 are tightly fitted without affecting the mutual rotation between the two center connecting plates 1, thereby completing the retractor splicing;

[0066] Then, when the patient's wound is stretched open by the retractor, the stretching side retractor 402 and the stretching main retractor 405 can be respectively installed on the two ends of the stretching bent rod 3 by installing the clamping block 401, and the stretching side retractor 402 and the stretching main retractor 405 can be kept aligned after closing through the mutual cooperation between the limiting arc groove 403 and the limiting arc block 406. At the same time, the connecting side plate 409 can be limited and clamped by the guide flat groove 404 and the limiting flat groove 407 to prevent the central installation shaft 408 and the connecting side plate 409 from affecting the normal use of the retractor. At the same time, the stretching main retractor 405 can be replaced with retractors of different specifications according to the patient's condition and on-site requirements;

[0067] When the side expansion hooks 402 and the main expansion hooks 405 are inserted into the patient's wound, the front rod 2 is driven inward to drive the expansion curved rod 3 to expand outward, and then the patient's wound is expanded by the expansion side hooks 402 and the main expansion hooks 405 while the expansion curved rod 3 is expanded outward. When the expansion curved rod 3 expands the wound to a suitable position, a good view of the inside of the wound cannot be obtained;

[0068] When the operation is continued and a larger field of view is needed for surgery, the spliced ​​arc strip 415 and the spliced ​​hexagonal column 412 are clamped to the corresponding positions through the spliced ​​arc groove 410 and the spliced ​​hexagonal groove 411, and the driving end rod 420 is horizontally pulled with the central installation shaft 408 as the center point. In the process of the driving end rod 420 being pulled, the spliced ​​hexagonal column 412 and the installation arc block 413 are synchronously driven to rotate through the cooperation between the extended flat rod 418 and the elastic arc plate 419, and the central installation shaft 408 and the connecting side plate 409 are driven to rotate during the rotation of the spliced ​​hexagonal column 412, and then the central installation shaft 408 and the connecting side plate 409 are driven to rotate at the center. During the rotation of the mounting shaft 408 and the connecting side plate 409, the spliced ​​arc strip 415 drives the elastic connecting plate 416 and the lateral stretching hook 417 to swing, and then the end of the wound is stretched open by the swing of the elastic connecting plate 416 and the lateral stretching hook 417. The elastic connecting plate 416 can be adjusted left and right and fine-tuned up and down as required, and the lateral stretching hook 417 is limited by the cooperation between the limiting small column 421 and the limiting small hole 422, so that the diamond-shaped wound can be stretched into a triangle, effectively improving the field of view inside the wound, so that medical staff can check the condition inside the wound, such as Figure 8 As shown;

[0069] After the driving front rod 2 and the spreading bent rod 3 are swung to the appropriate positions, the position of the driving front rod 2 needs to be fixed. An additional fulcrum can be set at the end of the driving front rod 2 through the driving end ring 501, so that the medical staff can pull the driving front rod 2 more effortlessly. At the same time, the limiting elastic ring 505 can limit the position between the two driving end rings 501, and then the limiting arc piece 506 and the components thereon are bundled to one side of the limiting elastic ring 505 through the connecting small ring 513 to prevent the limiting arc piece 506 from being lost during use.

[0070] The limiting arc piece 506 is installed inside a driving front rod 2 by cooperating between the mounting disc 507 and the mounting card hole 504. Then, in the process of the two driving front rods 2 approaching each other, the limiting disc 508 on the top of the limiting arc piece 506 can be sequentially clipped into the limiting card hole 503, and then the limiting arc piece 506 is used to limit the two driving front rods 2 so that the stretched wound can be continuously maintained within the appropriate size range, thereby realizing rapid fixation of the retractor shape.

[0071] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A retractor for axillary sentinel lymph node biopsy, comprising a central connecting plate (1), characterized in that: One end of the central connecting plate (1) is fixedly connected to a driving front rod (2), and the other side of the driving front rod (2) is fixedly connected to a support bent rod (3); The end of the spreading bent rod (3) is provided with a multi-angle spreading support mechanism (4); The multi-angle support mechanism (4) comprises a mounting block (401); The ends of the two spreading bent rods (3) are fixedly connected to mounting clamps (401), and the end of one mounting clamp (401) is fixedly clamped to a spreading side hook (402), a limiting arc groove (403) is provided in the middle of the inner side of the spreading side hook (402), and a guide flat groove (404) is transversely provided on one side of the spreading side hook (402) at a position corresponding to the middle of the limiting arc groove (403); Another end of the mounting block (401) is fixedly connected with a main pull hook (405), and a limited arc block (406) is fixedly connected to a position inside the limiting arc groove (403) on one side of the main pull hook (405), and a limited flat groove (407) is provided through the middle of one side of the limiting arc block (406), and a central mounting shaft (408) is rotatably installed in the middle of the inner side of the limiting arc block (406), and a connecting side plate (409) is fixedly installed in the middle of one side of the central mounting shaft (408) at a position inside the limiting arc groove (403), and a splicing arc groove (410) is provided through the middle of the side of the connecting side plate (409), and a splicing hexagonal groove (411) is provided in the middle of the top of the central mounting shaft (408); A splicing hexagonal column (412) is inserted and installed at a position corresponding to the top of the central installation axis (408) inside the splicing hexagonal groove (411), a mounting arc block (413) is fixedly connected to the middle of the top of the splicing hexagonal column (412), a connecting bent plate (414) is fixedly connected to one side of the mounting arc block (413) at a position corresponding to the top of the splicing arc groove (410), and a splicing arc strip (415) is fixedly connected to the bottom end of the connecting bent plate (414) at a position corresponding to the inside of the splicing arc groove (410); An elastic connecting plate (416) is fixedly connected to the middle of one side of the spliced ​​arc strip (415), and a lateral stretching hook (417) is fixedly connected to the end of the elastic connecting plate (416). Through the combined design of the stretching side stretching hook (402), the stretching main stretching hook (405) and the lateral stretching hook (417), the stretching area of ​​the sentinel lymph node wound by medical staff is increased, so that the stretching shape of the wound is changed from a rhombus to a triangle.

2. The retractor for axillary sentinel lymph node biopsy according to claim 1, characterized in that: An extended flat rod (418) is fixedly connected to the other side of the mounting circular arc block (413), an elastic arc plate (419) is symmetrically fixedly connected to the end of the extended flat rod (418), an end of the elastic arc plate (419) is fixedly connected to the driving end rod (420), a limited small column (421) is fixedly connected to the middle of the bottom end of the driving end rod (420), and a limited small hole (422) is provided through the middle position of the top surface of the support bent rod (3).

3. The retractor for axillary sentinel lymph node biopsy according to claim 1, characterized in that: The top surface of the mounting block (401) is flush with the top surfaces of the corresponding side-opening hooks (402) and main-opening hooks (405), and the top and bottom corners of the side-opening hooks (402) and main-opening hooks (405) are both provided with arc chamfers.

4. The retractor for axillary sentinel lymph node biopsy according to claim 1, characterized in that: The two side surfaces of the connecting side plate (409) are respectively tightly fitted with the inner walls of the guide flat groove (404) and the limiting flat groove (407), and the end surface of the connecting side plate (409) is flush with the side surfaces of the opening side retractor (402) and the opening main retractor (405).

5. The retractor for axillary sentinel lymph node biopsy according to claim 2, characterized in that: The outer side of the spliced ​​hexagonal column (412) and the inner wall of the spliced ​​hexagonal groove (411) are tightly slidably fitted, the outer arc surface of the spliced ​​arc strip (415) and the inner arc surface of the spliced ​​arc groove (410) are tightly slidably fitted, and the end face of the spliced ​​arc strip (415) and the end face of the spliced ​​arc groove (410) are flush with each other.

6. The retractor for axillary sentinel lymph node biopsy according to claim 2, characterized in that: Anti-slip grooves are evenly arranged on both sides of the driving end rod (420), the bottom surface of the extended flat rod (418) and the top surface of the corresponding stretched bent rod (3) are slidably fitted with each other, the limiting small column (421) and the limiting small hole (422) correspond to each other, and the limiting small column (421) and the limiting small hole (422) fit each other.

7. The retractor for axillary sentinel lymph node biopsy according to claim 1, characterized in that: A tail limit support mechanism (5) is provided on the outside of the driving front rod (2); The tail limit support mechanism (5) comprises a drive end ring (501); The ends of the two driving front rods (2) are fixedly connected to the driving end rings (501), and the middle positions of the side surfaces of the two driving front rods (2) are penetrated with mounting arc holes (502), the middle position of the top of one mounting arc hole (502) is penetrated with a limit clamping hole (503), and the middle position of the bottom surface of the other mounting arc hole (502) is penetrated with a mounting clamping hole (504); A limiting elastic ring (505) is sleeved between the two driving end rings (501), a connecting small ring (513) is sleeved on the middle of one side of the limiting elastic ring (505), a limiting arc piece (506) is slidably provided at the end of the connecting small ring (513) corresponding to the inner position of the mounting arc hole (502), a mounting circular piece (507) is fixedly connected to one end of the bottom surface of the limiting arc piece (506) corresponding to the inner position of the mounting clamping hole (504), a limiting circular piece (508) is fixedly connected to the other end of the top surface of the limiting arc piece (506) at an equidistant and uniform distance, and a compression rubber piece (509) is bonded to one end of the inner side of the limiting arc piece (506) close to the limiting circular piece (508); A splicing bottom bolt (510) is movably engaged at the inner bottom end of one of the center connecting plates (1), and a splicing cover ring (511) is threadedly mounted at a position corresponding to the top end of the other center connecting plate (1) on the outer side of the splicing bottom bolt (510), and a compression rubber ring (512) is embedded and bonded to the bottom edge of the splicing cover ring (511).

8. The retractor for axillary sentinel lymph node biopsy according to claim 7, characterized in that: The corners of the installation arc hole (502) are all provided with arc chamfers, the top and bottom surfaces of the limiting arc piece (506) are tightly slidably fitted with the inner wall of the installation arc hole (502), and deformation arc grooves are provided through both ends of the inner side of the limiting arc piece (506).

9. The retractor for axillary sentinel lymph node biopsy according to claim 7, characterized in that: The mounting disc (507) and the mounting clamping hole (504) are correspondingly clamped to each other, and the limiting disc (508) and the limiting clamping hole (503) are correspondingly clamped to each other.

10. The retractor for axillary sentinel lymph node biopsy according to claim 7, characterized in that: The top edge of the splicing cover ring (511) is provided with anti-slip grooves at equal intervals along the circumferential direction, and the bottom surface of the compression rubber ring (512) is tightly slidably fitted with the top surface of the corresponding central connecting plate (1).

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