Drag hook for armpit sentinel lymph node biopsy

Abstract

The invention discloses a drag hook for armpit sentinel lymph node biopsy, and relates to the technical field of medical instruments, the drag hook comprises a central connecting plate, one end of the central connecting plate is fixedly connected with a driving front rod, the other side of the driving front rod is fixedly connected with distraction bent rods, the end parts of the two distraction bent rods are fixedly connected with mounting clamping blocks, and the mounting clamping blocks are fixedly connected with the central connecting plate. By means of the sentinel lymph node distraction device, the distraction area of medical staff on a sentinel lymph node wound is effectively increased, the operation view is effectively improved, the operation space is increased, an operation can be completed by one operator, meanwhile, due to the flexible structural design of the elastic connecting plate and the lateral distraction drag hooks, the operation is convenient, and the operation efficiency is improved. Extra tearing injury caused by rigid pulling on the edge of the skin when a wound is longitudinally opened is effectively prevented, and the use safety of the retractor is further improved.

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 of primary tumor drainage. They are the first lymph nodes that primary tumors must pass through for lymph node metastasis. Sentinel lymph nodes serve as a barrier to prevent tumor cells from spreading from lymphatic channels. Their clinical significance has been paid attention to. Corresponding retractors are needed in the process of sentinel lymph node biopsy on patients. For this purpose, a Chinese patent discloses an improved medical retractor with application number 202222673350.7. The patent uses the meshing connection between the gear and the rack, so that the rotation of the gear can drive the rack to move in parallel, so that the connecting plate can move horizontally toward the direction of the limit seat under the limit of the limit bar, so that the connecting plate drives the insulating retractor to move its position, so as to facilitate the adjustment of the degree of skin pulling of the insulating retractor, and make the retractor assembly more flexible in pulling the skin;

[0003] However, due to the lack of corresponding auxiliary structures during the use of retractors, when medical staff open a living wound, even if two retractors are used in combination to pull the wound edge, the wound can only be opened into a diamond structure. At the same time, due to the special location of the sentinel lymph nodes 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 that the retractor proposed in the above background technology lacks a corresponding auxiliary structure during use, resulting in that when medical staff open a living wound, even if two retractors are used in combination to pull the edge of the wound, the wound can only be stretched into a diamond structure. 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 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 opening bending rod is provided with a multi-angle opening 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 the end of one mounting block is fixedly connected with an expanded side hook, and 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 at one side of the expanded side hook corresponding to the middle position of the limited arc groove;

[0009] Another end of the mounting block is fixedly connected with a main pull hook, one side of the main pull hook is fixedly connected with a limited arc block at a position corresponding to the inner position of the limited arc groove, a limited flat groove is penetrated in the middle of one side of the limited arc block, a central mounting shaft is rotatably installed in the middle of the inner side of the limited arc block, a connecting side plate is fixedly installed in the middle of one side of the central mounting shaft at a position corresponding to the inner position of the limited arc groove, a splicing arc groove is penetrated in 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] A spliced ​​hexagonal column is inserted and installed at the top position of the central installation axis corresponding to the inside of the spliced ​​hexagonal groove, and a mounting arc block is fixedly connected to the middle of the top of the spliced ​​hexagonal column. 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, and a spliced ​​arc strip is fixedly connected to the bottom end of the connecting bent plate corresponding to the inner position of the spliced ​​arc groove.

[0011] Preferably, an elastic connecting plate is fixedly connected to the middle part of one side of the spliced ​​arc strip, 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, an elastic arc plate is symmetrically fixedly connected to the end of the extended flat rod, a driving end rod is fixedly connected to the end of the elastic arc plate, a limiting small column is fixedly connected to the middle part of the bottom end of the driving end rod, and a limiting small hole is penetrated 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 arc chamfers are provided at the top and bottom corners of the side hooks and main hooks.

[0013] Preferably, the two side surfaces of the connecting side plate are respectively tightly fitted with the inner walls of the guiding flat groove and the limiting flat groove, 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 arranged on both sides of the driving end rod, the bottom surface of the extended flat rod and the corresponding top surface of the stretched bent rod are slidably 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 each other.

[0016] Preferably, a tail limit 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 with driving end rings, and the middle positions of the sides 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 limited position 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 in the middle of one side of the limiting elastic ring, a limiting arc piece is slidably arranged 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 with a mounting circular piece at a position corresponding to the inner position of the mounting card hole, the other end of the top surface of the limiting arc piece is evenly and equidistantly fixedly connected with 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 clamped at the bottom inner end of one of the center connecting plates, and a splicing cover ring is threadedly installed at the outer side of the splicing bottom bolt at a position corresponding to the top end of another center connecting plate, and a compression rubber ring is embedded and bonded at the bottom edge of the splicing cover ring.

[0021] Preferably, the corners of the mounting arc hole are provided with circular chamfers, the top and bottom surfaces of the limiting arc piece are tightly slidably fitted with the inner wall of the mounting arc hole, and deformation arc grooves are penetrated at 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 top edge of the splicing cover ring is provided with anti-slip grooves at equal intervals along the circumferential direction, and the bottom surface of the clamping 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 present invention has a scientific and reasonable structure and is safe and convenient to use:

[0025] 1. A multi-angle expansion support mechanism is provided. Through the mutual cooperation between the components inside the multi-angle expansion support mechanism, the use process of the retractor is optimized. Through the combination design of the expansion side retractor, the expansion main retractor and the lateral expansion retractor, the expansion area of ​​the sentinel lymph node wound of the medical staff is effectively improved, and the expansion shape of the wound is changed from a rhombus to a triangle, which effectively improves the observation field of the medical staff and improves the observation effect of the internal tissue 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 and causing additional lacerations, further improving the safety of the use of the retractor;

[0026] At the same time, through the splicing structural design between the arc groove and the hexagonal groove and the arc strip and the hexagonal column, the smaller side opening hook and the main opening hook can be inserted into the wound to open the wound to a certain size, and then the elastic connecting plate and the side opening hook are connected to the main opening hook for secondary opening, and the opening shape of the wound is adjusted at the same time, which effectively improves the convenience of using the hook, and enables the side opening hook and the main opening hook to be used separately in combination, which effectively improves the application range of the hook;

[0027] And through the cooperation between the limiting arc groove and the limiting arc block, the fitting accuracy between the open side hook and the open main hook is effectively improved, and through the mutual cooperation between the guiding flat groove and the limiting flat groove, the central mounting shaft and the connecting side plate are stored and limited, thereby effectively preventing the open side hook and the open 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 translate, which effectively improves the stability and smoothness of the hook during use.

[0028] 2. A tail limit support mechanism is provided. Through the cooperation between the components inside the tail limit support mechanism, the use and fixing process of the retractor is optimized. Through the cooperation between the limit card hole, the installation card hole and the 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 being fatigued by continuous hand force during the entire opening process, further improving the convenience of using the retractor. At the same time, the splicing structure design of the limit arc piece enables the medical staff to remove the limit arc piece when they only need to open the incision for a short time, so as to expand the use and scope of the retractor;

[0029] At the same time, each component is limited by a limiting elastic ring and a connecting small ring to prevent the hook from being lost during use, and 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 side hooks and main hooks connected to the open bent rods can be separated and used separately, effectively expanding the shape change range of the hook and improving the use effect of the 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. In addition, through the spliced ​​structural design of the elastic connecting plate and the lateral stretching 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 pull 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 picture:

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

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

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

[0036] Figure 4 The present invention Figure 3 Sectional view at A in the middle;

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

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

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

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

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

[0042] Fig.10 It is a structural schematic diagram of the installation of the small connecting ring of the present invention;

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

[0044] 4. Multi-angle support mechanism; 401. Install the card block; 402. Open the side hook; 403. Limit the arc groove; 404. Guide flat groove; 405. Open the main hook; 406. Limit the arc block; 407. Limit the flat groove; 408. Center installation axis; 409. Connect the side plate; 410. Splice the arc groove; 411. Splice the hexagonal groove; 412. Splice the hexagonal column; 413. Install the arc block; 414. Connect the bent plate; 415. Splice the arc strip; 416. Elastic connecting plate; 417. Laterally open the hook; 418. Extend the flat rod; 419. Elastic arc plate; 420. Drive end rod; 421. Limit the small column; 422. Limit the small hole;

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

[0046] The preferred embodiments of the present invention are described below in conjunction with 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 curved rod 3;

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

[0049] The multi-angle opening support mechanism 4 includes a mounting block 401, an opening side hook 402, a limiting arc groove 403, a guide flat groove 404, an opening main hook 405, a limiting arc block 406, a limiting flat groove 407, a central mounting shaft 408, a connecting side plate 409, a splicing arc groove 410, a splicing hexagonal groove 411, a splicing hexagonal column 412, an installation arc block 413, a connecting bent plate 414, a splicing arc strip 415, an elastic connecting plate 416, a lateral opening 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 with mounting blocks 401, and an opening side hook 402 is fixedly connected with one end of the mounting block 401. A limited 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 transversely provided at the middle position of the limited arc groove 403 on one side of the opening side hook 402;

[0051] Another mounting block 401 is fixedly connected with a main hook 405 at its end, and the top surface of the mounting block 401 is flush with the top surfaces of the corresponding side hooks 402 and main hooks 405, and arc chamfers are provided at the top and bottom corners of the side hooks 402 and main hooks 405;

[0052] A limited arc block 406 is fixedly connected at a position corresponding to the inner position of the limited arc groove 403 on one side of the main opening hook 405, a limited flat groove 407 is penetrated through the middle of one side of the limited arc block 406, a central installation shaft 408 is rotatably installed in the middle of the inner side of the limited arc block 406, a connecting side plate 409 is fixedly installed at a position corresponding to the inner position of the limited arc groove 403 on the middle of one side of the central installation shaft 408, 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 limited 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 formed through the middle of the side surface of the connecting side plate 409, and a splicing hexagonal groove 411 is formed in the middle of the top of the central installation shaft 408;

[0054] A splicing hexagonal column 412 is installed in the splicing hexagonal groove 411 at the top position of the central installation axis 408, 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 the top position of the splicing arc groove 410, a splicing arc strip 415 is fixedly connected to the bottom end of the connecting bent plate 414 at the position inside the splicing arc groove 410, the outer side of the splicing hexagonal column 412 is tightly slidably fitted with the inner wall of the splicing hexagonal groove 411, the outer arc surface of the splicing arc strip 415 is tightly slidably fitted with the inner arc surface of the splicing arc groove 410, and the end face of the splicing arc strip 415 is flush with the end of the splicing arc groove 410;

[0055] An elastic connecting plate 416 is fixedly connected to the middle part 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. An extended flat rod 418 is fixedly connected to the other side of the installation arc block 413. An elastic arc plate 419 is symmetrically fixedly connected to the end of the extended flat rod 418, and a driving end rod 420 is fixedly connected to the end of the elastic arc plate 419. A limited column 421 is fixedly connected to the middle part of the bottom end of the driving end rod 420, and a limited hole 422 is penetrated through the middle position of the top surface of the stretched bent rod 3. Anti-slip grooves are evenly arranged on both sides of the driving end rod 420, and the bottom surface of the extended flat rod 418 and the corresponding top surface of the stretched bent rod 3 are slidably fitted with each other, 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 each other, and the use process of the retractor is optimized through the mutual cooperation between the components inside the multi-angle expansion support mechanism 4. The combination design of the three retractors, namely, the expansion side retractor 402, the expansion main retractor 405 and the lateral expansion retractor 417, effectively improves 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 observation field of medical staff and the observation effect of the internal tissue 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 the wound is longitudinally expanded, thereby preventing additional lacerations, and 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 connected to the main opening hook 405 for secondary opening, and the opening shape of the wound is 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 in combination separately, which effectively improves the application range of the hook;

[0057] And through the cooperation between the limiting arc groove 403 and the limiting arc block 406, the fitting accuracy between the open side hook 402 and the open main hook 405 is effectively improved, and through the mutual cooperation between the guiding flat groove 404 and the limiting flat groove 407, the central mounting shaft 408 and the connecting side plate 409 are stored and limited, thereby effectively preventing the open side hook 402 and the open main hook 405 from shaking randomly during the closed use process, and the elastic arc plate 419 is used to connect 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 translate, which effectively improves the stability and smoothness of the hook during use;

[0058] A tail limit support mechanism 5 is arranged on the outer side of the driving front rod 2;

[0059] The tail limit support mechanism 5 includes a driving end ring 501, an installation arc hole 502, a limit clamping hole 503, an installation clamping hole 504, a limit elastic ring 505, a limit arc sheet 506, an installation disc 507, a limit disc 508, a compression rubber sheet 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 with driving end rings 501, and the middle positions of the sides 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 limited position 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;

[0061] A limiting elastic ring 505 is sleeved between the two driving end rings 501, a connecting small ring 513 is sleeved in the middle of one side of the limiting elastic ring 505, and a limiting arc piece 506 is slidably arranged at the end of the connecting small ring 513 corresponding to the inner position of the mounting arc hole 502, and arc chamfers are arranged at the corners of the mounting arc hole 502, and 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 through 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 with a mounting disc 507 at a position corresponding to the inner position of the mounting card hole 504, and the other end of the top surface of the limiting arc piece 506 is evenly and evenly fixedly connected with a limiting disc 508. A compression rubber 509 is bonded to one end of the inner side of the limiting arc piece 506 close to the limiting disc 508. The mounting disc 507 and the mounting card hole 504 are correspondingly connected, and the limiting disc 508 and the limiting card hole 503 are correspondingly connected.

[0063] A splicing bottom bolt 510 is movably connected to the bottom inner end of a center connecting plate 1, and a splicing cover ring 511 is installed through a thread at the top position of another center connecting plate 1 corresponding to 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. The top edge of the splicing cover ring 511 is equidistantly provided with anti-slip grooves 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. The mutual cooperation between the components inside the tail limit support mechanism 5 optimizes the use and fixing process of the draw hook. Through the 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 curved 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 to expand 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 center connecting plates 1 to be disassembled as needed during use, so that the corresponding side hooks 402 and main hooks 405 connected to the opening bending rods 3 can be separated and used separately, effectively expanding the shape change range of the hook and improving the use effect of the hook.

[0065] Working principle and use process of the present invention: In the actual application process of the present invention, when it is necessary to use a retractor in combination to pull and stretch the patient's wound, the retractor needs to be adjusted and assembled first, and 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 to the top of the center connecting plate 1 through a thread, 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 wound of the patient is stretched open by the retractor, the side retractor 402 and the main retractor 405 can be respectively installed to the ends of the two stretching curved rods 3 by installing the clamp block 401, and the side retractor 402 and the main retractor 405 can be kept aligned after closing by 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 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 extension hooks 402 and the main extension hooks 405 are inserted into the wound of the patient, the front rod 2 is driven inward to drive the extension curved rod 3 to be extended outward, and then the side extension hooks 402 and the main extension hooks 405 are used to extend the wound of the patient while the extension curved rod 3 is extended outward. When the extension curved rod 3 extends 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 moved with the central installation shaft 408 as the center point. In the process of the driving end rod 420 being moved, 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 central installation shaft 408. 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, which effectively improves 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 opening bent rod 3 are swung to the appropriate positions, the position of the driving front rod 2 needs to be fixed. An additional force point 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 with less effort. At the same time, the two driving end rings 501 can be limited by the limiting elastic ring 505, 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 the mutual cooperation 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 snapped 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 the rapid fixation of the hook shape.

[0071] Finally, it should be noted that the above description is only a preferred example 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 can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope 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 bending rod (3); The end of the opening bent rod (3) is provided with a multi-angle opening 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 with mounting blocks (401), and the end of one mounting block (401) is fixedly connected with a spreading side hook (402), and 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 one side of the main pull hook (405) at a position corresponding to the inner position of the limited arc groove (403). A limited flat groove (407) is provided through the middle of one side of the limited arc block (406), and a central mounting shaft (408) is rotatably installed in the middle of the inner side of the limited arc block (406). A connecting side plate (409) is fixedly installed in the middle of one side of the central mounting shaft (408) at a position corresponding to the inner position of the limited arc groove (403). A splicing arc groove (410) is provided through the middle of the side surface 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), 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) 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).

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

3. The retractor for axillary sentinel lymph node biopsy according to claim 1, characterized in that: The top surface of the installation block (401) is flush with the top surfaces of the corresponding side hooks (402) and main hooks (405), and the top and bottom corners of the side hooks (402) and main 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 guiding 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 hook (402) and the opening main hook (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) is tightly slidably fitted with the inner wall of the spliced ​​hexagonal groove (411), the outer curved surface of the spliced ​​arc strip (415) is tightly slidably fitted with the inner curved surface of the spliced ​​arc groove (410), and the end face of the spliced ​​arc strip (415) is flush with the end of the spliced ​​arc groove (410).

6. The retractor for axillary sentinel lymph node biopsy according to claim 2, characterized in that: Anti-skid 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 open 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 arranged on the outer side 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 with driving end rings (501); a mounting arc hole (502) is provided through the middle of the side surfaces of the two driving front rods (2); a limiting clamping hole (503) is provided through the middle of the top of one of the mounting arc holes (502); and a mounting clamping hole (504) is provided through the middle of the bottom surface of the other mounting arc hole (502); A limiting elastic ring (505) is sleeved between the two driving end rings (501), a connecting small ring (513) is sleeved on the middle part of one side of the limiting elastic ring (505), a limiting arc-shaped piece (506) is slidably arranged at the end of the connecting small ring (513) at a position corresponding to the inner position of the mounting arc-shaped hole (502), a mounting circular piece (507) is fixedly connected to one end of the bottom surface of the limiting arc-shaped piece (506) at a position corresponding to the inner position of the mounting clamping hole (504), a limiting circular piece (508) is evenly and equidistantly fixedly connected to the other end of the top surface of the limiting arc-shaped piece (506), and a compression rubber piece (509) is bonded to one end of the inner side of the limiting arc-shaped piece (506) close to the limiting circular piece (508); A splicing bottom bolt (510) is movably clamped at the inner bottom end of one of the central connecting plates (1), and a splicing cover ring (511) is threadedly mounted at a position on the outer side of the splicing bottom bolt (510) corresponding to the top end of the other central connecting plate (1), 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 mounting arc hole (502) are all provided with circular 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 penetrated at 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 clamping rubber ring (512) is tightly slidably fitted with the top surface of the corresponding central connecting plate (1).

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