Endoscopic tissue morcellator extractor

Abstract

The utility model relates to medical instrument technical field, concretely relates to a cavity mirror tissue broken and take out ware, including sleeve, mobile column is arranged in the sleeve, drive assembly is arranged on the sleeve, the connecting sleeve is fixed on the end of mobile column, the protection box is fixed on the connecting sleeve, and the protection box is equipped with the slot for placing the tissue to be cut on, and the slot is close to the connecting sleeve, the connecting sleeve and protection box all have the elastic deformation characteristics, the tissue cutting assembly is arranged in the protection box, and the tissue cutting assembly can follow the protection box synchronous movement. The utility model, push metal cutting net one, under the cooperation of metal cutting net two and metal cutting net one, can cut the tissue (tumor) and break, when cutting is completed, rotates drive assembly and draws the connecting sleeve and protection box and contracts into the sleeve, thereby convenient to contract the tissue after cutting into the sleeve, is convenient to take out the tissue after cutting, and simple and convenient operation.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a laparoscopic tissue fragmentation and extraction device. Background Technology

[0002] In laparoscopic surgery, it is often necessary to remove large tissues or tumors. Traditional surgical methods involve either enlarging the incision to remove the tissue or cutting the tissue into pieces through a very small puncture. The former increases patient trauma and prolongs recovery time, while the latter increases the difficulty of the operation and prolongs the operation time.

[0003] Therefore, developing a laparoscopic surgical instrument that can efficiently and safely break up and remove tissue without enlarging the incision is of great clinical significance. For example, Chinese patent CN206630657U discloses a minimally invasive surgical system for breaking up specimens with pneumoperitoneum. This system can remove large volumes of diseased tissue from a small incision without leaving any diseased tissue in the body. It is safe and reliable and reduces the risk of recurrence of the patient's condition.

[0004] However, the applicant discovered that when cutting tumor tissue, the aforementioned comparative patent's crushing device could not accurately cut the tissue while ensuring that the bag was not damaged. Furthermore, after the cutting was completed, the aforementioned comparative patent either directly removed the bag or used a negative pressure device to suction out the lesion tissue before removing the bag. If the bag was removed directly, the incision would be enlarged because the bag contained tumor tissue. If a negative pressure device was used to suction out the tissue, other equipment was introduced, making the process cumbersome. Therefore, developing an integrated laparoscopic surgical instrument that can crush and remove tissue without enlarging the incision has significant clinical implications. Utility Model Content

[0005] The purpose of this invention is to propose a laparoscopic tissue fragmentation and extraction device to solve the problem of low efficiency of existing laparoscopic tissue fragmenters, which cannot quickly extract fragmented tumor tissue after accurate cutting and fragmentation.

[0006] To achieve the above objectives, this utility model provides a laparoscopic tissue fragmentation and extraction device, including a sleeve, with one end open and the other end sealed, and further comprising: A movable column, which is slidably disposed within a sleeve; A drive assembly, which is disposed on the sleeve, is used to push the movable column to move within the sleeve; A connecting sleeve, which is fixed to the end of the movable column and is flared in shape; A protective box is fixed on a connecting sleeve, and the protective box has a slot for placing the tissue to be cut, and the slot is close to the connecting sleeve. Both the connecting sleeve and the protective box have elastic deformation characteristics. A tissue cutting assembly is disposed within a protective box and is capable of moving synchronously with the protective box. The tissue cutting component can cut the tissue to be cut. After the cutting is completed, the rotating drive component pulls the connecting sleeve and the protective box into the sleeve to remove the cut tissue.

[0007] Preferably, the drive assembly includes an external thread formed on the surface of the sleeve, an internal threaded sleeve is threadedly connected to the external thread, a connecting block is fixed on the moving column, and a strip-shaped through groove is formed on the sleeve for the connecting block to pass through. A sliding sleeve connected to the connecting block is slidably fitted on the sleeve, and the sliding sleeve is rotatably connected to the end of the internal threaded sleeve.

[0008] Preferably, the tissue cutting assembly includes a first metal cutting mesh and a second metal cutting mesh. The first metal cutting mesh is movably disposed within the protective box, and the second metal cutting mesh is fixed within the protective box. The slot is located between the first and second metal cutting meshes. The moving column is provided with a thrust assembly for moving the first metal cutting mesh.

[0009] Preferably, the thrust assembly includes a push rod, and the movable column has a channel for the push rod to pass through. One end of the push rod is connected to a metal cutting mesh, and the other end passes through a sleeve and is fixed with a grip ring. A connecting ring is fixedly sleeved on the push rod, and a placement cavity for placing the connecting ring is opened on the inner wall of the channel. A spring is sleeved on the push rod, with one end of the spring abutting against the connecting ring and the other end abutting against the inner wall of the placement cavity.

[0010] Preferably, the tissue cutting assembly includes a first metal cutting mesh and a second metal cutting mesh, both of which are composed of transverse metal wires and longitudinal metal wires, and both the transverse and longitudinal metal wires are serrated metal wires.

[0011] Preferably, the movable column is composed of column one and column two, and the cross-section of column one is smaller than that of column two. Multiple balls are rolled on the inner wall of the sleeve opening end, and the balls are in contact with the surface of column one.

[0012] The beneficial effects of this utility model are as follows: Since both the protective box and the connecting sleeve have elastic deformation characteristics, when the protective box and the connecting sleeve are pushed out of the sleeve during use, they return to their initial shape under their own elastic deformation characteristics, making it easy to put the tissue to be cut into the protective box. Then, the first metal cutting mesh is pushed, and under the push of the first metal cutting mesh, the tumor tissue is pushed closer to the second metal cutting mesh. At the same time, the first metal cutting mesh and the tumor tissue are moved away from the groove. With the cooperation of the first metal cutting mesh and the second metal cutting mesh, the tissue (tumor) can be cut and broken without escaping from the groove. After the cutting is completed, the rotating drive component pulls the connecting sleeve and the protective box to retract into the sleeve, thereby making it easy to retract the cut tissue into the sleeve and to remove the cut tissue. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This utility model Figure 1 Top view; Figure 3 This utility model Figure 1 A sectional view; Figure 4 This is a schematic diagram of the structure of the protective box of this utility model being retracted into the sleeve; Figure 5 This is a schematic diagram of the internal threaded sleeve, connecting block, and sliding sleeve of this utility model.

[0014] In the diagram: 1. Sleeve; 2. Moving column; 3. Connecting sleeve; 4. Protective box; 5. Internal threaded sleeve; 6. Connecting block; 7. Strip groove; 8. Sliding sleeve; 9. Metal cutting mesh one; 10. Metal cutting mesh two; 11. Push rod; 13. Connecting ring; 14. Spring; 15. Ball bearing. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0016] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, a laparoscopic tissue fragmentation and extraction device includes a sleeve 1, with one end of the sleeve 1 open and the other end sealed, and further includes: The movable column 2 is slidably disposed within the sleeve 1; A drive assembly is mounted on the sleeve 1 and is used to push the movable column 2 to move within the sleeve 1. Connecting sleeve 3 is fixed to the end of the movable column 2, and the connecting sleeve 3 is flared. The protective box 4 has an arc-shaped end, which makes it easy to be squeezed and retracted into the sleeve 1. The protective box 4 is fixed on the connecting sleeve 3, and the protective box 4 has a slot for placing the tissue to be cut. The slot is close to the connecting sleeve 3. Both the connecting sleeve 3 and the protective box 4 have elastic deformation characteristics. The tissue cutting component is housed within the protective box 4 and can move synchronously with the protective box 4. The tissue cutting component can cut the tissue to be cut. After the cutting is completed, the rotating drive component pulls the connecting sleeve 3 and the protective box 4 into the sleeve 1 to remove the cut tissue.

[0017] The connecting sleeve 3 and the protective box 4 can be made of polyurethane or silicone. The connecting sleeve 3 and the protective box 4 made of polyurethane (PU) have significant elastic deformation characteristics, which is the core reason why they are widely used in industrial buffering, sealing and transmission systems. The material deforms when subjected to force and spontaneously returns to its original shape immediately after the external force is removed. It also has a certain mechanical strength, so that the tissue to be cut can be supported when placed in the protective box 4. In addition, in order to further improve the strength and elasticity of the connecting sleeve 3, an elastic metal sheet that fits to it can be provided on the inner wall of the connecting sleeve 3. One end of the elastic metal sheet is connected to the moving column 2 and the other end is connected to the protective box 4.

[0018] In a preferred embodiment of the present invention, the driving component includes an external thread formed on the surface of the sleeve 1, an internal threaded sleeve 5 threadedly connected to the external thread, a connecting block 6 fixed on the moving column 2, and a strip-shaped through groove 7 for the connecting block 6 to pass through on the sleeve 1. A sliding sleeve 8 connected to the connecting block 6 is slidably fitted on the sleeve 1, and the sliding sleeve 8 is rotatably connected to the end of the internal threaded sleeve 5. The surface of the internal threaded sleeve 5 is provided with friction texture.

[0019] When it is necessary to move the movable column 2 within the sleeve 1, rotate the internal threaded sleeve 5. The internal threaded sleeve 5 rotates on the external thread. Since the internal threaded sleeve 5 is rotatably connected to the sliding sleeve 8, the rotation of the internal threaded sleeve 5 will drive the sliding sleeve 8 to move on the sleeve 1. Thus, under the transmission action of the connecting block 6, the movable column 2 will move within the sleeve 1, thereby enabling the protective box 4 and the connecting sleeve 3 to be pushed out or retracted into the sleeve 1.

[0020] In another preferred embodiment of the present invention, the tissue cutting assembly includes a metal cutting mesh 9 and a metal cutting mesh 10. The metal cutting mesh 9 and the metal cutting mesh 10 are arc-shaped, which facilitates their retraction into the sleeve 1. The metal cutting mesh 9 is movably disposed in the protective box 4, and the metal cutting mesh 10 is fixed in the protective box 4. The slot is located between the metal cutting mesh 9 and the metal cutting mesh 10. The moving column 2 is provided with a thrust assembly for pushing the metal cutting mesh 9 to move. The thrust assembly includes a push rod 11. A channel for the push rod 11 to pass through is provided in the moving column 2. One end of the push rod 11 is connected to the metal cutting mesh 9, and the other end passes through the sleeve 1 and is fixed with a grip ring. A connecting ring 13 is fixedly sleeved on the push rod 11, and a placement cavity for placing the connecting ring 13 is opened on the inner wall of the channel. A spring 14 is sleeved on the push rod 11, with one end of the spring 14 abutting against the connecting ring 13 and the other end abutting against the inner wall of the placement cavity.

[0021] Both metal cutting mesh 19 and metal cutting mesh 20 are composed of horizontal and vertical metal wires, and both horizontal and vertical metal wires are serrated metal wires. The metal wires are nitinol metal wires, which have super elasticity and shape memory properties. They can immediately recover without external force. The metal mesh woven from nitinol metal wires has moderate strength and excellent toughness, which also promotes the recovery of the protective box 4 to its initial state. It is suitable for scenarios that require repeated deformation and also has a certain strength to cut tissues.

[0022] When the protective box 4 and connecting sleeve 3 are pushed out of the sleeve 1 by rotating the internal threaded sleeve 5, they return to their initial shape under the action of the elastic deformation characteristics of the connecting sleeve 3 and the protective box 4. Then, the tissue to be cut is placed into the protective box 4 through the surgical instrument, and the push rod 11 is pushed to move the metal cutting mesh 9 by overcoming the elastic force of the spring 14. Since the groove is adjacent to the metal cutting mesh 9, when the metal cutting mesh 9 moves, it will push the tumor tissue towards the metal cutting mesh 10 and away from the groove. The metal cutting mesh 10 plays a role in the movement of the tumor tissue. For the limiting function, with the cooperation of metal cutting mesh 19 and metal cutting mesh 20, the tissue (tumor) can be cut and broken without escaping from the groove. After the cutting is completed, the internal thread sleeve 5 is rotated to drive the moving column 2 to move. The moving column 2 drives the protective box 4 to move into the sleeve 1. The ball bearing 15 at the end of the sleeve 1 will squeeze the connecting sleeve 3 and the protective box 4. Since the connecting sleeve 3 is flared and the outer surface of the connecting sleeve 3 is arc-shaped, it is easier for the connecting sleeve 3 to retract into the sleeve 1 more smoothly, so as to facilitate the removal of the cut and shrunken tissue.

[0023] It should be noted that the movable column 2 is composed of column one and column two, and the cross-section of column one is smaller than that of column two. Multiple balls 15 are rolled on the inner wall of the open end of the sleeve 1, and the balls 15 are in contact with the surface of column one.

[0024] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0025] The embodiments of this utility model are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A laparoscopic tissue fragmentation and extraction device, comprising a sleeve (1), wherein one end of the sleeve (1) is open and the other end is sealed, characterized in that, Also includes: The movable column (2) is slidably disposed inside the sleeve (1); A drive assembly, which is disposed on the sleeve (1), is used to push the movable column (2) to move within the sleeve (1); Connecting sleeve (3), the connecting sleeve (3) is fixed on the end of the moving column (2), and the connecting sleeve (3) is flared; The protective box (4) is fixed on the connecting sleeve (3), and the protective box (4) has a slot for placing the tissue to be cut, and the slot is close to the connecting sleeve (3). Both the connecting sleeve (3) and the protective box (4) have elastic deformation characteristics. The tissue cutting component is disposed inside the protective box (4) and can move synchronously with the protective box (4); The push tissue cutting component can cut the tissue to be cut. After the cutting is completed, the rotating drive component pulls the connecting sleeve (3) and the protective box (4) into the sleeve (1) to remove the cut tissue.

2. The laparoscopic tissue fragmentation and extraction device according to claim 1, characterized in that, The drive assembly includes an external thread formed on the surface of the sleeve (1), an internal thread sleeve (5) threadedly connected to the external thread, a connecting block (6) fixed on the moving column (2), and a strip-shaped through groove (7) for the connecting block (6) to pass through on the sleeve (1). A sliding sleeve (8) connected to the connecting block (6) is slidably fitted on the sleeve (1), and the sliding sleeve (8) is rotatably connected to the end of the internal thread sleeve (5).

3. The laparoscopic tissue fragmentation and extraction device according to claim 1, characterized in that, The tissue cutting assembly includes a metal cutting mesh one (9) and a metal cutting mesh two (10). The metal cutting mesh one (9) is movably disposed in the protective box (4), and the metal cutting mesh two (10) is fixed in the protective box (4). The slot is located between the metal cutting mesh one (9) and the metal cutting mesh two (10). The moving column (2) is provided with a thrust assembly for pushing the metal cutting mesh one (9) to move.

4. The laparoscopic tissue fragmentation and extraction device according to claim 3, characterized in that, The thrust assembly includes a push rod (11), and the moving column (2) has a channel for the push rod (11) to pass through. One end of the push rod (11) is connected to the metal cutting mesh (9), and the other end passes through the sleeve (1) and is fixed with a grip ring. A connecting ring (13) is fixedly sleeved on the push rod (11), and a placement cavity for placing the connecting ring (13) is opened on the inner wall of the channel. A spring (14) is sleeved on the push rod (11), one end of the spring (14) abuts against the connecting ring (13), and the other end abuts against the inner wall of the placement cavity.

5. The laparoscopic tissue fragmentation and extraction device according to claim 4, characterized in that, Both the metal cutting mesh one (9) and the metal cutting mesh two (10) are composed of transverse metal wires and longitudinal metal wires, and both transverse metal wires and longitudinal metal wires are serrated metal wires.

6. The laparoscopic tissue fragmentation and extraction device according to claim 5, characterized in that, The movable column (2) is composed of column one and column two, and the cross-section of column one is smaller than that of column two. Multiple balls (15) are rolled on the inner wall of the open end of the sleeve (1), and the balls (15) are in contact with the surface of column one.

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