Liver tissue cutter

Abstract

The invention relates to the technical field of medical instruments, and discloses a liver tissue cutter which comprises a tube body and further comprises an arc-shaped telescopic head arranged at the end of the tube body, a telescopic control assembly connected with the arc-shaped telescopic head is arranged on the tube body, and a cutting knife is arranged on the inner side of the arc-shaped telescopic head in the bending direction. The clamping body is hinged to the portion, below the bending direction of the arc-shaped telescopic heads, of the pipe body, the pipe body is provided with a squeezing assembly used for driving the clamping body to rotate, the top of the clamping body is provided with a cutter groove corresponding to the cutter, and the two sides of the cutter groove are provided with a plurality of telescopic heads arranged in rows. When the liver tissue cutter is used for carrying out a liver cutting operation, netted blood vessels and bile ducts which do not need to be cut can be more quickly avoided, the cutting position is accurately determined, the cutting frequency is reduced, the liver tissue is stably clamped, damage caused by stopping which does not need to be cut is avoided, the operation time is shortened, and the defects in the prior art are overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a liver tissue cutter. Background Art

[0002] The liver is an organ in the body that mainly performs metabolic functions and has strong regenerative capabilities. The liver tissue is covered with a large number of reticular blood vessels and bile ducts. If the liver develops lesions such as local tumor formation (hepatic hemangioma, hepatocellular carcinoma, cholangiocarcinoma, etc.), local liver resection or liver lobe or segment resection is required. In modern liver resection surgery, safety and speed are the two major goals pursued during liver resection. Safety mainly refers to minimizing or eliminating bleeding during liver resection, avoiding miscutting or inaccurate cutting, and preserving normal tissue as much as possible; speed refers to the ability to quickly sever liver tissue, shorten the operation time as much as possible, and reduce the trauma time, which is of great benefit to the patient's recovery, the repair of trauma, and the recovery of the final swelling period.

[0003] At present, the cutters used in liver cutting surgery are all linear. However, the pipe structures on the surface of the liver and inside the liver are not horizontal or vertical, and almost all have a certain angle. When using existing linear cutters to cut the liver during surgery, it is difficult to quickly and effectively avoid the dense network of blood vessels and bile ducts. Multiple small-scale cuts are required to effectively avoid healthy blood vessels and bile ducts. The multiple small-scale cutting process is time-consuming and labor-intensive, and the operation time is long, which is not conducive to the patient's postoperative recovery. In addition, the existing linear cutters are difficult to effectively clamp when facing irregular liver tissue, resulting in poor grasping of the cutting position. Accuracy is prone to deviations, and it is easier to damage large blood vessels and other tissues that do not need to be cut, resulting in safety accidents.

[0004] Therefore, we propose a liver cutter that can better adapt to the liver surface and intrahepatic bile duct and blood vessel structures. Summary of the invention

[0005] The present invention provides a liver tissue cutter, which can more quickly avoid reticular blood vessels and bile ducts that do not need to be cut and accurately determine the cutting position during liver resection surgery, reduce the number of cutting times, stably clamp liver tissue, avoid damage to areas that do not need to be cut, shorten the operation time, and solve the shortcomings of the above-mentioned prior art.

[0006] The technical solution of the present invention is: a liver tissue cutter, comprising a tube body, and further comprising:

[0007] The cutting component includes: an arc-shaped telescopic head, a cutting knife and a clamping body, wherein the arc-shaped telescopic head is arranged at the end of a tube body, a telescopic control component connected to the arc-shaped telescopic head is arranged on the tube body, the cutting knife is arranged on the inner side of the bending direction of the arc-shaped telescopic head, the clamping body is hinged on the tube body below the bending direction of the arc-shaped telescopic head, a pressing component for driving the clamping body to rotate is arranged on the tube body, a knife groove corresponding to the cutting knife is arranged on the top of the clamping body, and a plurality of rows of telescopic heads are arranged on both sides of the knife groove.

[0008] Preferably, a cutting groove is provided on the inner side of the curved telescopic head in the bending direction, the cutting knife is slidably connected in the cutting groove, a propulsion component for controlling the sliding of the cutting knife is provided in the tube body, and the blade of the cutting knife is arranged on the side away from the tube body.

[0009] Preferably, a mounting groove is provided on the side of the inner cutting groove in the bending direction of the arc-shaped telescopic head, and a arc-shaped nail magazine is detachably connected in the mounting groove, and anastomosis staples are arranged in the arc-shaped nail magazine. A nail seat matching with the anastomosis staples is provided on the top of the telescopic head.

[0010] Preferably, the arc-shaped telescopic head comprises: a fixed tube, a primary telescopic tube and a secondary telescopic tube, the fixed tube is arranged at the end of the tube body and is connected to the tube body, the primary telescopic tube and the secondary telescopic tube are arc-shaped, the primary telescopic tube is slidably connected to the fixed tube, and the secondary telescopic tube is slidably connected in the primary telescopic tube, a mounting groove is opened on the side wall of the tube body, and a through hole is provided on the side of the mounting groove that passes through the arc-shaped telescopic head, and the telescopic control component comprises: a control pull rod and a push block, the control pull rod is arranged in the through hole, one end passes through the tube body and is fixedly connected to the side wall of the second telescopic tube, a limiting ring for the control pull rod to pass through is provided on the side walls of the fixed tube and the primary telescopic tube, and the other end of the control pull rod passes into the mounting groove, the push block is slidably connected in the mounting groove, and frictionally cooperates with the inner wall of the mounting groove, and the push block is connected to the control pull rod.

[0011] Preferably, the propulsion assembly includes: a fixed block, a screw and a driving mechanism, wherein two fixed blocks are provided and arranged on the inner wall of the tube body, the screw is rotatably connected between the fixed blocks, a screw slider is threadedly connected to the screw, a push piece connected to the cutting knife is provided on the screw slider, one end of the screw away from the arc-shaped telescopic head passes through the fixed block, and the driving mechanism is arranged on the tube body away from the arc-shaped telescopic head and connected to the screw; the driving mechanism is used to drive the screw to rotate.

[0012] Preferably, two first mounting heads are symmetrically arranged on the inner wall of the tube body. A first rotating disc is rotatably connected to the first mounting head. Two first strip-shaped openings are arranged on the side wall of the tube body near the first rotating disc. Two connecting heads are arranged on the clamping body. The connecting heads pass through the first strip-shaped openings and are fixedly connected to the first rotating disc. The pressing assembly includes: a second rotating disc and a pressing plate. Two second mounting heads are symmetrically arranged on the inner wall of the tube body far from the first mounting head. The second rotating disc is rotatably connected to the two second mounting heads. Two second strip-shaped openings are arranged on the side wall of the tube body near the second rotating disc. Two second connecting heads are arranged on the pressing plate. The second connecting heads pass through the second strip-shaped openings and are fixedly connected to the second rotating disc. The first rotating disc and the second rotating disc are connected by a connecting rope.

[0013] Preferably, the driving mechanism includes: a connecting cylinder, a storage battery and a motor. The connecting cylinder is detachably connected to one end of the tube body far from the arc-shaped telescopic head. The storage battery is at the bottom of the connecting cylinder. The motor is arranged inside the connecting cylinder near the opening. A connecting block is arranged on the rotating shaft of the motor. A clamping groove is arranged on the connecting block. A clamping block connected to the clamping groove is arranged at the end of the lead screw. A control switch is further arranged on the side wall of the connecting cylinder. The control switch is electrically connected to the storage battery and the motor respectively. The motor is electrically connected to the storage battery.

[0014] Preferably, limiting columns are arranged on both sides of the cutting knife. Sliding grooves are oppositely arranged on both sides of the inner wall of the knife groove for the limiting columns to slide. A longitudinal groove communicating with the sliding groove is arranged on one side of the sliding groove close to the hinged end.

[0015] Preferably, torsion springs are arranged on the first rotating disc and the first mounting head. The fixed position of the connecting rope on the second rotating disc is far from the rotation center of the second rotating disc, and the fixed position of the connecting rope on the first rotating disc is close to the rotation center of the first rotating disc.

[0016] Preferably, an annular groove is arranged on the inner wall of the connecting cylinder. A mounting plate is arranged in the annular groove. A second spring is arranged between one side of the mounting plate far from the opening and the annular groove. The motor is fixedly connected to the mounting plate. The storage battery is installed at the bottom of the connecting cylinder. The inner diameter of the connecting cylinder is larger than the outer diameter of the tube body. Two clamping columns are symmetrically arranged on the outer side wall of the tube body. An L-shaped clamping groove matched with the clamping column is arranged on the side wall of the connecting cylinder.

[0017] The beneficial effects of the present invention:

[0018] The present invention provides a liver tissue cutter. When in use, first, according to the approximate shape of the tissue to be cut, the arc-shaped telescopic head is adaptively adjusted through the telescopic control component to form an arc-shaped telescopic head that can adapt to the surface of the liver and the bile duct and blood vessel structures within the liver. During the cutting process, hold the tube body and use the telescopic control component to control the end of the arc-shaped telescopic head to expand and contract, and gradually insert the arc-shaped telescopic head into and avoid the healthy bile ducts and blood vessel structures within the liver. Place the tissue to be removed and the edge part of the healthy component between the arc-shaped telescopic head and the clamping body. Then, use the pressing component to drive the clamping body to rotate to press the cutting part of the liver tissue and firmly fix the liver tissue. Finally, cut the liver tissue with a cutting knife.

[0019] Compared with traditional linear cutters, this liver tissue cutter is provided with an arc-shaped telescopic head that can be telescopically adjusted and is equipped with a cutting knife, as well as a clamping body that can be adapted to the arc-shaped telescopic head. During use, continuous adjustment can more quickly avoid the reticular blood vessels and bile ducts, and quickly and accurately determine the cutting position. During the cutting process, damage to tissues such as large blood vessels that do not need to be cut is avoided, reducing the probability of safety accidents. Moreover, the arc-shaped telescopic head cooperates with the telescopic head on the support body, and can stably clamp and press both the thicker and thinner parts of the cutting tissue. The cutting process is not prone to deviation, and a relatively large number of diseased tissues can be cut at one time, thereby greatly shortening the operation time, reducing the working intensity of doctors, and being beneficial to the postoperative recovery of patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the schematic front sectional view structure diagram of the present invention;

[0021] Figure 2 is the schematic top sectional view structure diagram of the telescopic head of the present invention;

[0022] Figure 3 is the schematic top view structure diagram of the clamping body of the present invention;

[0023] Figure 4 is the schematic top sectional view structure diagram of the present invention;

[0024] Figure 5 is the schematic top sectional view structure diagram of the present invention;

[0025] Figure 6 is the schematic front detailed sectional view structure diagram at position A of the present invention;

[0026] Figure 7 is the schematic top sectional view structure diagram of the drive mechanism of the present invention;

[0027] Figure 8 is the schematic front view structure diagram of the present invention.

[0028] Description of the reference numerals in the drawings:

[0029] 1. Tube body; 11. Installation groove; 12. First mounting head; 121. First rotating disk; 122. First strip-shaped opening; 13. Second mounting head; 14. Second strip-shaped opening; 15. Clamping post; 2. Cutting component; 21. Arc-shaped telescopic head; 211. Cutting groove; 212. Staple cartridge; 213. Fixed tube; 214. First-level telescoping; 22. Cutting knife; 23. Clamping body; 231. Knife groove; 232. Telescopic head; 233. Staple base; 3. Telescopic control assembly; 31. Control pull bar; 32. Pushing block; 4. Pushing assembly; 41. Fixed block; 42. Lead screw; 421. Lead screw slider; 422. Pushing piece; 43. Driving mechanism; 431. Connecting cylinder; 432. Battery; 433. Motor; 434. Connecting block; 435. Card slot; 436. Control switch; 437. Annular groove; 438. Mounting plate; 5. Pressing assembly; 51. Second rotating disk; 52. Pressing plate. Detailed implementation manners

[0030] The following will describe in detail a specific implementation manner of the present invention in conjunction with the drawings. It should be understood that the protection scope of the present invention is not limited by the specific implementation manner.

[0031] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the technical solutions of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0032] Combined with Figures 1 to 8 As shown, a liver tissue cutter includes a tube body 1, and further includes:

[0033] Cutting member 2, comprising: an arc-shaped telescopic head 21, a cutting knife 22 and a clamping body 23. The arc-shaped telescopic head 21 is arranged at the end of the pipe body 1. A telescopic control assembly 3 connected to the arc-shaped telescopic head 21 is provided on the pipe body 1. The cutting knife 22 is arranged on the inner side of the bending direction of the arc-shaped telescopic head 21. The clamping body 23 is hinged below the bending direction of the arc-shaped telescopic head 21 on the pipe body 1. A pressing assembly 5 for driving the clamping body 23 to rotate is provided on the pipe body 1. A knife groove 231 corresponding to the cutting knife 22 is provided at the top of the clamping body 23. A plurality of rows of telescopic heads 232 are provided on both sides of the knife groove 231. The telescopic head 232 includes: a mounting pipe and a mounting cap. A first spring is provided in the mounting pipe. The mounting pipe is also sleeved with a mounting cap. A pressing column extending into the mounting pipe and abutting against the first spring is provided in the mounting cap. Limiting blocks are provided on the outer side wall of the mounting pipe and the inner side wall of the mounting cap. The nail seat 233 is arranged at the top of the mounting cap. The two adjacent mounting caps are in contact with each other.

[0034] Further, a cutting groove 211 is provided on the inner side of the bending direction of the arc-shaped telescopic head 21. The cutting knife 22 is slidably connected in the cutting groove 211. A pushing assembly 4 for controlling the sliding of the cutting knife 22 is provided in the pipe body 1. The cutting edge of the cutting knife 22 is opened on the side away from the pipe body 1. The cutting knife 22 is in the knife groove 231 during the cutting process. In addition to the way given in this embodiment, the cutting knife 22 can also be directly arranged on the side wall on the bending direction side of the fixed pipe 213, the first-stage telescopic pipe 214 and the second-stage telescopic pipe 215. A chute for accommodating the cutting knife 22 on the next-stage telescopic pipe is provided on the side wall on the bending direction side of the fixed pipe 213 and the first-stage telescopic pipe 214. The cutting edge of the cutting knife 22 is arranged below the cutting knife 22. During the cutting process of this form of cutting knife 22, the cutting knife 22 completes the cutting action until it extends into the knife groove 231.

[0035] Further, on the side of the inner cutting groove 211 in the bending direction of the arc-shaped telescopic head 21, there is an installation groove, and an arc-shaped staple cartridge 212 is detachably connected in the installation groove. The arc-shaped staple cartridge 212 is provided with anastomosis staples, and on the top of the telescopic head 232, there is a staple base 233 that cooperates with the anastomosis staples; the installation grooves are provided on both sides of the cutting groove 211, and a protective cover is clamped on the installation groove. According to the surgical situation, select one side of the installation groove, remove the protective cover, and install the arc-shaped staple cartridge 212 therein, and do not open the protective cover on the other side to facilitate the tissue pressing operation during the operation; the structure of the arc-shaped staple cartridge 212 is various and is a common product in the prior art. The arc-shaped staple cartridge 212 used by this cutter only has a change in the arc in shape compared with the arc-shaped staple cartridge 212 in the prior art; for the existing staple cartridges, one type can release the anastomosis staples by directly applying pressure, and the other type requires an actuating component to be actuated. This cutter does not make specific limitations on these two types of staple cartridges. If the second type of staple cartridge is selected, the actuating component can be arranged on the push piece 422 on the side of the cutting knife 22 away from the tube body 1.

[0036] Further, the arc-shaped telescopic head 21 includes: a fixed tube 213, a first-stage telescopic tube 214, and a second-stage telescopic tube 215. The fixed tube 213 is arranged at the end of the tube body 1 and is communicated with the tube body 1. The first-stage telescopic tube 214 and the second-stage telescopic tube 215 are arc-shaped. The first-stage telescopic tube 214 is slidably connected to the fixed tube 213, and the second-stage telescopic tube 215 is slidably connected inside the first-stage telescopic tube 214. An installation groove 11 is opened on the side wall of the tube body 1, and a through hole facing the arc-shaped telescopic head 21 to penetrate is provided on the side of the installation groove 11. The telescopic control assembly 3 includes: a control pull bar 31 and a push block 32. The control pull bar 31 is arranged in the through hole, and one end penetrates out of the tube body 1 and is fixedly connected to the side wall of the second-stage telescopic tube 215. Limit rings for the control pull bar to pass through are provided on the side walls of the fixed tube 213 and the first-stage telescopic tube 214. The other end of the control pull bar 31 penetrates into the installation groove 11. The push block 32 is slidably connected in the installation groove 11 and is in frictional cooperation with the inner wall of the installation groove 11. The push block 32 is connected to the control pull bar 31. The control pull bar 31 is made of a metal material, specifically a metal sheet, which can be bent but not compressed. Anti-slip lines are provided on the top of the push block 32, and the setting of the anti-slip lines prevents slipping when controlling the length of the arc-shaped telescopic head 21.

[0037] Furthermore, the propulsion assembly 4 includes: a fixed block 41, a lead screw 42, and a driving mechanism 43. There are two fixed blocks 41, which are arranged on the inner wall of the pipe body 1. The lead screw 42 is rotatably connected between the fixed blocks 41. A lead screw slider 421 is threadedly connected to the lead screw 42. A pushing piece 422 connected to the cutting knife 22 is provided on the lead screw slider 421. One end of the lead screw 42 away from the arc-shaped telescopic head 21 passes through the fixed block 41. The driving mechanism 43 is arranged on the pipe body 1 away from the arc-shaped telescopic head 21 and is connected to the lead screw 42. The driving mechanism 43 is used to drive the lead screw 42 to rotate. The propulsion method of the lead screw 42 and the lead screw slider 421 has lower requirements for electric components compared to simply using an electric telescopic rod, and can adapt when the length of the pipe body 1 changes. The detachable connection of the driving mechanism 43 enables a single driving mechanism 43 to be applicable to multiple pipe bodies 1 for connection. The pipe body 1 and some of the components provided thereon are disposable items and are discarded after use. The setting of the driving mechanism 43 saves more production costs.

[0038] Furthermore, two first mounting heads 12 are symmetrically provided on the inner wall of the pipe body 1. A first rotating disk 121 is rotatably connected to the first mounting head 12. Two first strip-shaped openings 122 are provided on the side wall of the pipe body 1 near the first rotating disk 121. Two connecting heads are provided on the clamping body 23. The connecting heads pass through the first strip-shaped openings 122 and are fixedly connected to the first rotating disk 121. The squeezing assembly 5 includes: a second rotating disk 51 and a pressing plate 52. Two second mounting heads 13 are symmetrically provided on the inner wall of the pipe body 1 away from the first mounting head 12. Two second rotating disks 51 are rotatably connected to the second mounting heads 13. A second strip-shaped opening 14 is provided on the side wall of the pipe body 1 near the second rotating disk 51. Two second connecting heads are provided on the pressing plate 52. The second connecting heads pass through the second strip-shaped opening 13 and are fixedly connected to the second rotating disk 51. The first rotating disk 121 and the second rotating disk 51 are connected by a connecting rope 53. The squeezing assembly 5 uses the connecting rope 53 to control the clamping body 23 to rotate and squeeze. If the length of the pipe body 1 changes, only the length of the connecting rope 53 needs to be changed. The adjustment of the size of this cutter is convenient, and only the length of the connecting rope 53 needs to be changed.

[0039] Further, the driving mechanism 43 includes: a connecting cylinder 431, a storage battery 432, and a motor 433. The connecting cylinder 431 is detachably connected to one end of the pipe body 1 away from the arc-shaped telescopic head 21. The storage battery 432 is at the bottom of the connecting cylinder 431. The motor 433 is arranged inside the connecting cylinder 431 near the opening. A connecting block 434 is provided on the rotating shaft of the motor 433, and a clamping groove 435 is provided on the connecting block 434. A clamping block 423 connected to the clamping groove 435 is provided at the end of the lead screw 42. A control switch 436 is further provided on the side wall of the connecting cylinder 431. The control switch 436 is electrically connected to the storage battery 432 and the motor 433 respectively, and the motor 433 is electrically connected to the storage battery 432; the motor 433 is a reduction motor.

[0040] Further, limiting columns are provided on both sides of the cutting knife 22. Opposite sliding grooves are provided on both sides of the inner wall of the knife groove 231 for the limiting columns to slide. A longitudinal groove communicating with the sliding groove is provided on one side of the sliding groove close to the hinge end, and the top end of the longitudinal groove penetrates through the clamping body 23; after the liver tissue is squeezed during the cutting process, the limiting columns provided on the cutting knife 22 enter the sliding grooves through the longitudinal grooves. During the cutting process, the cutting knife 22 is located in the knife groove 231, and the limiting columns slide in the sliding grooves, thereby limiting the movement of the cutting knife 22 and ensuring that tissues with different thicknesses can be completely cut.

[0041] Further, torsion springs are provided on the first rotating disk 121 and the first mounting head 12. The function of the torsion spring is to control the clamping body 23 to rotate in a direction away from the arc-shaped telescopic head 21 when no pressure is applied to the clamping body 23 through the squeezing assembly 5. The fixed position of the connecting rope 53 on the second rotating disk 51 is far from the rotation center of the second rotating disk 51, and the fixed position of the connecting rope 53 on the first rotating disk 121 is close to the rotation center of the first rotating disk 121. Rubber pads are provided on the top of the pressing plate 52 and the bottom of the pipe body 1. The setting of the rubber pads can prevent slipping during use and improve the comfort of hand holding, facilitating the surgical operator to apply a squeezing force to the liver tissue through the hand, ensuring that the tissue can be firmly clamped, enabling the anastomosis nails to be completely released, and preventing the tissue from displacing during the cutting process.

[0042] Further, an annular groove 437 is provided on the inner wall of the connecting cylinder 431. An installation plate 438 is provided in the annular groove 437. A second spring is provided between one side of the installation plate 438 far away from the opening and the annular groove 437. The motor 433 is fixedly connected to the installation plate 438, and the storage battery 432 is installed at the bottom of the connecting cylinder 431. During the assembly of the cutter, the installation plate 438 will shrink to a certain extent in the annular groove 437. The installation plate 438 can also ensure the stability of the connection between the motor 433 and the lead screw 42 during the use of the cutter, making the transmission smoother. A charging port electrically connected to the storage battery 432 is further provided on the side wall of the connecting cylinder 431. The charging port is equipped with a matching charging wire. The inner diameter of the connecting cylinder 431 is larger than the outer diameter of the pipe body 1. Two clamping columns 15 are symmetrically provided on the outer side wall of the pipe body 1. An L-shaped clamping groove matching with the clamping column 15 is provided on the side wall of the connecting cylinder 431. The design of clamping in the L-shaped clamping groove ensures the convenience of connection and can quickly complete the assembly during use.

[0043] Working principle and usage method of this embodiment:

[0044] The present invention provides a liver tissue cutter. When in use, after the assembly of the cutter is completed, first, according to the approximate shape of the liver tissue in the cutting area, the push block is pushed. The push block drives the arc-shaped telescopic head to extend by controlling the pull bar, forming a cutting head that can adapt to the liver and the bile duct and blood vessel structures in the liver. Then, the staple cartridge is loaded into the mounting groove on the arc-shaped telescopic head, and the staple cartridge is adjusted to the middle position of the arc-shaped telescopic head. During the cutting process, the hand-held tube body adjusts the telescoping of the secondary telescopic tube by slightly pushing the push block back and forth and cooperates with the gradual penetration and angle adjustment of the tube body to avoid the healthy bile ducts and blood vessel structures in the liver. The tissue to be removed and the edge part of the healthy component are placed between the arc-shaped telescopic head and the clamping body. After the cutting position is located, the hand presses the pressing plate. The pressing plate rotates to drive the second turntable to rotate, and then drives the first turntable to rotate by pulling the connecting rope. The rotation of the first turntable drives the clamping body to rotate towards the telescopic head direction, so as to press the part of the liver that needs to be cut. During the pressing process, the staple seat that can move up and down on the clamping body cooperates with the successfully released staples to anastomose the healthy tissue, relevant blood vessels and bile ducts in the area to be cut, so as to prevent a large amount of bleeding during the cutting process. After the staples complete the anastomosis of the tissue, continue to maintain the pressing on the liver tissue. At this time, the limiting column on the cutting knife enters the sliding groove through the longitudinal groove, and then the control switch is pressed to start the motor. The rotating shaft of the motor rotates, drives the lead screw to rotate through the cooperation of the connecting block and the clamping block. The lead screw slider arranged on the lead screw moves along the lead screw, and then pushes the pushing piece towards the arc-shaped telescopic head direction. The cutting knife arranged on the pushing piece moves in the cutting groove driven by the pushing piece. During the cutting process, the cutting knife cuts to the position in the knife groove, and the limiting column slides in the sliding groove, thereby limiting the movement of the cutting knife and ensuring that complete cutting can be completed for tissues with different thicknesses. When the motor controls the cutting knife to move to the end of the second telescopic rod, the liver tissue pressed between the arc-shaped telescopic head and the clamping body is cut off.

[0045] The above are only several specific embodiments of the present invention disclosed, but the embodiments of the present invention are not limited thereto. Any changes that can be thought of by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A liver tissue cutter, comprising a tube body (1) characterized in that: Also includes: The cutting component (2) comprises: an arc-shaped telescopic head (21), a cutting knife (22) and a clamping body (23); the arc-shaped telescopic head (21) is arranged at the end of a tube body (1); a telescopic control component (3) connected to the arc-shaped telescopic head (21) is arranged on the tube body (1); the cutting knife (22) is arranged on the inner side of the arc-shaped telescopic head (21) in the bending direction; the clamping body (23) is hinged on the tube body (1) below the arc-shaped telescopic head (21) in the bending direction; a pressing component (5) for driving the clamping body (23) to rotate is arranged on the tube body (1); a knife groove (231) corresponding to the cutting knife (22) is arranged on the top of the clamping body (23); and a plurality of rows of telescopic heads (232) are arranged on both sides of the knife groove (231).

2. A liver tissue cutter according to claim 1, characterized in that: A cutting groove (211) is provided on the inner side of the arc-shaped telescopic head (21) in the bending direction, and the cutting knife (22) is slidably connected in the cutting groove (211). A propulsion assembly (4) for controlling the sliding of the cutting knife (22) is provided in the tube body (1), and the blade of the cutting knife (22) is arranged on a side away from the tube body (1).

3. A liver tissue cutter according to claim 2, characterized in that: A mounting groove is provided on the side of the inner cutting groove (211) in the bending direction of the arc-shaped telescopic head (21), and a arc-shaped nail magazine (212) is detachably connected in the mounting groove. The arc-shaped nail magazine (212) is provided with anastomotic staples, and a nail seat (233) matched with the anastomotic staples is provided on the top of the telescopic head (232).

4. A liver tissue cutter according to claim 1, characterized in that: The arc-shaped telescopic head (21) comprises: a fixed tube (213), a primary telescopic tube (214) and a secondary telescopic tube (215); the fixed tube (213) is arranged at the end of the tube body (1) and is connected to the tube body (1); the primary telescopic tube (214) and the secondary telescopic tube (215) are arc-shaped; the primary telescopic tube (214) is slidably connected to the fixed tube (213); the secondary telescopic tube (215) is slidably connected inside the primary telescopic tube (214); a mounting groove (11) is provided on the side wall of the tube body (1); and a side edge of the mounting groove (11) is provided with a groove facing the arc-shaped telescopic head (21). The telescopic control assembly (3) comprises: a control strip (31) and a push block (32); the control strip (31) is arranged in the through hole, one end of which passes through the tube body (1) and is fixedly connected to the side wall of the second telescopic tube (215); a limit ring for the control strip to pass through is provided on the side walls of the fixed tube (213) and the first telescopic tube (214); the other end of the control strip (31) passes into the mounting groove (11); the push block (32) is slidably connected in the mounting groove (11) and frictionally matched with the inner wall of the mounting groove (11); the push block (32) is connected to the control strip (31).

5. A liver tissue cutter according to claim 2, characterized in that: The propulsion assembly (4) comprises: a fixed block (41), a screw rod (42) and a driving mechanism (43); the fixed blocks (41) are provided with two and are arranged on the inner wall of the tube body (1); the screw rod (42) is rotatably connected between the fixed blocks (41); a screw rod slider (421) is threadedly connected to the screw rod (42); a push piece (422) connected to the cutting knife (22) is provided on the screw rod slider (421); an end of the screw rod (42) away from the arc-shaped telescopic head (21) passes through the fixed block (41); the driving mechanism (43) is arranged on the tube body (1) away from the arc-shaped telescopic head (21) and is connected to the screw rod (42); the driving mechanism (43) is used to drive the screw rod (42) to rotate.

6. A liver tissue cutter according to claim 1, characterized in that: Two first mounting heads (12) are symmetrically arranged on the inner wall of the tube body (1), and a first rotating disk (121) is rotatably connected to the first mounting head (12). Two first strip-shaped openings (122) are arranged on the side wall of the tube body (1) near the first rotating disk (121). Two connecting heads are arranged on the clamping body (23), and the connecting heads pass through the first strip-shaped openings (122) and are fixedly connected to the first rotating disk (121). The pressing assembly (5) comprises: a second rotating disk (51) and a pressing plate (52). The inner wall of the tube body (1) Two second mounting heads (13) are symmetrically arranged on the inner wall away from the first mounting head (12); the second rotating disk (51) is provided with two rotating connections on the second mounting heads (13); a second strip-shaped opening (14) is provided on the side wall of the tube body (1) near the second rotating disk (51); two second connecting heads are provided on the pressure plate (52); the second connecting heads pass through the second strip-shaped opening (13) and are fixedly connected to the second rotating disk (51); the first rotating disk (121) and the second rotating disk (51) are connected by a connecting rope (53).

7. A liver tissue cutter according to claim 5, characterized in that: The driving mechanism (43) comprises: a connecting tube (431), a storage battery (432) and a motor (433); the connecting tube (431) is detachably connected to an end of the tube body (1) away from the arc-shaped telescopic head (21); the storage battery (432) is located at the bottom of the connecting tube (431); the motor (433) is arranged in the connecting tube (431) near the opening; a connecting block (434) is provided on the rotating shaft of the motor (433); a clamping groove (435) is provided on the connecting block (434); a clamping block (423) connected to the clamping groove (435) is provided at the end of the screw rod (42); a control switch (436) is also provided on the side wall of the connecting tube (431); the control switch (436) is electrically connected to the storage battery (432) and the motor (433) respectively; and the motor (433) is electrically connected to the storage battery (432).

8. A liver tissue cutter according to claim 2, characterized in that: Limiting columns are provided on both sides of the cutting knife (22), and sliding grooves are provided on both sides of the inner wall of the knife groove (231). The sliding grooves are used for sliding the limiting columns, and a longitudinal groove connected to the sliding groove is provided on one side of the sliding groove close to the hinge end.

9. A liver tissue cutter according to claim 6, characterized in that: The first rotating disk (121) and the first mounting head (12) are provided with torsion springs; the connecting rope (53) is fixed at a position on the second rotating disk (51) away from the rotation center of the second rotating disk (51); and the connecting rope (53) is fixed at a position on the first rotating disk (121) close to the rotation center of the first rotating disk (121).

10. The liver tissue cutter according to claim 7, characterized in that: An annular groove (437) is provided on the inner wall of the connecting tube (431), a mounting plate (438) is provided in the annular groove (437), a second spring is provided between the annular groove (437) and the side of the mounting plate (438) away from the opening, the motor (433) is fixedly connected to the mounting plate (438), the storage battery (432) is installed at the bottom of the connecting tube (431), the inner diameter of the connecting tube (431) is larger than the outer diameter of the tube body (1), two clamping columns (15) are symmetrically provided on the outer side wall of the tube body (1), and an L-shaped clamping groove matching the clamping column (15) is provided on the side wall of the connecting tube (431).

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