Tumor sampling device facilitating tumor separation

Abstract

The utility model belongs to the technical field of medical instruments, and provides a tumor sampling device convenient for tumor separation. The device mainly comprises a puncture needle sleeve, a sampling needle and a separation needle. The puncture needle sleeve comprises a needle tube with scale marks and a first needle base of a hollow structure. The sampling needle is provided with a first needle core with a sampling groove at the front end and a second needle seat convenient to operate. The separating needle is ingenious in structure, an elastic piece in a sheet spring form is arranged in an assembling groove in the front end of the second needle core and is fixed through a limiting piece, a force applying part of the elastic piece is connected with two semicircular scrapers, and when a needle tube is inserted, the scrapers are closed at the initial stage to conveniently enter and are tightly attached to the inner wall under the elastic effect after going deep, and the scrapers are spliced into a big-end-back circular truncated cone shape. The device has the advantages of guiding, efficiently separating tissues, completely pushing out attached tissues, avoiding waste, providing reliable samples for detection, solving the traditional problems through unique design, having important significance in tumor diagnosis and treatment, and powerfully promoting the progress of medical technology.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a tumor sampling device that facilitates tumor separation. Background Technology

[0002] Percutaneous tumor biopsy is the foundation of brachytherapy and interventional therapy. It is characterized by minimal trauma, less pain, and rapid recovery. It is widely used in clinical practice for cytological biopsy diagnosis and tissue sampling, and is currently a commonly used cancer detection and treatment method.

[0003] In the prior art, Chinese utility model patent application number CN202220525016.4 discloses a novel biopsy puncture needle, including a puncture needle sheath and a sampling needle core that can be inserted and cooperated with the puncture needle sheath. The front end of the sampling needle core has a sampling groove, and the rear end of the sampling needle core is connected to a sampling needle core seat. The rear end of the puncture needle sheath is connected to the puncture needle sheath seat, and the puncture needle sheath seat has an axial through hole. The biopsy puncture needle also includes a plunger that can be inserted and cooperated with the puncture needle sheath. An annular scraper is fixed to the front end of the plunger, and the inner wall of the annular scraper is fixedly connected to the outer wall of the front end of the plunger. The outer wall of the annular scraper can fit against the inner wall of the puncture needle sheath, and the rear end of the plunger is connected to a handle. This design uses an annular scraper to extract residual tissue cells on the inner wall of the puncture needle sheath. After ROSE, the puncture can be judged in advance whether the puncture is qualified, which not only improves the diagnostic efficiency, but also avoids wasting puncture material for subsequent pathological diagnosis.

[0004] The aforementioned technique involves inserting a circular scraper into the puncture needle sheath to push out residual tissue cells. However, for the circular scraper to enter the puncture needle sheath, its outer diameter must be smaller than the inner diameter of the puncture needle sheath. As a result, the circular scraper cannot achieve a tight fit after entering the puncture needle sheath, and therefore cannot effectively scrape out cells attached to the inner wall of the puncture needle sheath. Therefore, to address the above problem, we propose a tumor sampling device that facilitates tumor separation. Utility Model Content

[0005] To overcome the problems existing in related technologies, this utility model discloses a tumor sampling device that facilitates tumor separation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A tumor sampling device for facilitating tumor separation includes a puncture needle sheath, a sampling needle, and a separation needle. The separation needle includes a second needle core, a third needle seat, a scraper, and an elastic element. The third needle seat is fixed to the rear end of the second needle core. There are two scrapers, each in a semi-circular shape. The maximum outer diameter of the two scrapers combined into a circle matches the inner diameter of the needle tube. The elastic element is installed at the front end of the second needle core and has two force-applying parts. The two scrapers are respectively connected to the two force-applying parts, and the mating surfaces of the two scrapers are arranged opposite to each other. The two force-applying parts of the elastic element are used to push the two scrapers to opposite sides.

[0008] Furthermore, the puncture needle sheath includes a needle tube and a first needle hub fixed to the rear end of the needle tube. The first needle hub is a hollow structure with an open rear end and communicating with the needle tube.

[0009] Furthermore, the side of the syringe has several scale markings.

[0010] Furthermore, the sampling needle includes a first needle core and a second needle seat fixed to the rear end of the first needle core, and a sampling groove is provided at the front of the first needle core.

[0011] Furthermore, the second needle core has an assembly groove at its front end, and the elastic element is installed in the assembly groove.

[0012] Furthermore, the elastic element is a leaf spring, the middle part of which is bent to form a curved portion that is assembled in the assembly groove, and the portions of the leaf spring located on both sides of the curved portion are force-applying portions, with the two force-applying portions extending forward out of the assembly groove.

[0013] Furthermore, the second needle core is equipped with a limiting member for preventing the leaf spring from moving forward out of the assembly slot.

[0014] Furthermore, the limiting member is a round rod that is radially fixed to the second needle core and passes through the assembly groove, and the curved part is sleeved on the outside of the round rod.

[0015] Furthermore, the second needle core has a mounting hole that radially penetrates the second needle core, and the round rod is installed in the mounting hole.

[0016] Furthermore, the two scrapers, when joined together, will form a frustum shape that is smaller in the front and larger in the back.

[0017] This invention discloses a tumor sampling device that facilitates tumor separation, featuring a uniquely designed separation needle. Its scraper initially conforms to the inner wall of the needle tube and enters, then, with the help of an elastic element, tightly adheres to the inner wall to scrape away tissue, effectively overcoming the problem of traditional scrapers not being able to achieve a tight fit. The scraper of the separation needle is a frustum-shaped tube, smaller at the front and larger at the back, combining guiding and efficient separation functions. It can completely expel attached tissue from the needle tube, avoiding tissue waste and providing a reliable sample for subsequent testing, thus improving diagnostic efficiency. This innovative design overcomes the shortcomings of existing technologies and provides strong support for tumor diagnosis and treatment. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 This is a schematic diagram of the assembly of the sampling needle and the puncture needle sheath according to an embodiment of the present invention;

[0020] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0021] Figure 3 This is a cross-sectional schematic diagram of the assembly of the separation needle and the puncture needle according to an embodiment of the present invention;

[0022] Figure 4 for Figure 3 Enlarged structural diagram at point B;

[0023] Figure 5 This is a schematic diagram showing the connection between the scraper and the elastic element in one embodiment of the present invention.

[0024] The meanings of the labels in the attached diagram are as follows:

[0025] Puncture needle sheath 1, needle tube 11, scale mark 111, first needle seat 12, sampling needle 2, first needle core 21, sampling groove 211, second needle seat 22, separation needle 3, second needle core 31, assembly groove 311, mounting hole 312, third needle seat 32, scraper 33, elastic element 34, force application part 341, bending part 342, limiting element 35. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] Reference Figures 1-5 As shown, the tumor sampling device in this embodiment includes a puncture needle sheath 1, a sampling needle 2, and a separation needle 3.

[0028] In this embodiment, the puncture needle sheath 1 consists of a needle tube 11 and a first needle hub 12. The needle tube 11 is a long and slender tube with several evenly distributed graduation marks 111 on its side. These graduation marks 111 help the doctor accurately control the insertion depth during puncture. The first needle hub 12 is firmly connected to the rear end of the needle tube 11, has a hollow structure and an open rear end, so as to facilitate cooperation with the sampling needle 2 and the separation needle 3.

[0029] In this embodiment, the sampling needle 2 includes a first needle core 21 and a second needle seat 22. The front end of the first needle core 21 has a sampling groove 211, which allows tissue samples to enter the sampling groove 211 when puncturing into the tumor tissue. The second needle seat 22 is fixed to the rear end of the first needle core 21 for easy hand operation by the doctor.

[0030] In this embodiment, the separating needle 3 is mainly composed of a second needle core 31, a third needle seat 32, a scraper 33, and an elastic element 34.

[0031] Specifically, the rear end of the second needle core 31 is connected to the third needle seat 32, and the front end has an assembly groove 311. A leaf spring-type elastic element 34 is installed within the assembly groove 311. The middle part of the elastic element 34 is bent to form a bent portion 342, and the portions of the elastic element 34 on both sides of the bent portion 342 form force-applying portions 341. The bent portion 342 has an elastic force that drives the force-applying portions 341 on both sides to expand outwards. The bent portion 342 is located within the assembly groove 311, and the force-applying portions 341 on both sides of the bent portion 342 extend forward out of the assembly groove 311. A radially penetrating mounting hole 312 is also provided on the second needle core 31. A round rod is installed within the mounting hole 312 as a limiting element 35. The bent portion 342 of the elastic element 34 is fitted onto the outside of the round rod to prevent the elastic element 34 from dislodging forward from the assembly groove 311.

[0032] Specifically, there are two scrapers 33, which are semi-circular in shape. The two scrapers 33 are arranged with their mating surfaces facing each other and are respectively connected to the two force-applying parts 341 of the elastic member 34. In the natural state, the force-applying parts 341 of the elastic member 34 push the two scrapers 33 to opposite sides. When the two scrapers 33 are joined together, their maximum outer diameter matches the inner diameter of the needle tube 11, and after joining, they form a frustum shape that is smaller at the front and larger at the back. The frustum shape can play a guiding role so that the scrapers 33 can be smoothly inserted into the needle tube 11.

[0033] During sampling, the needle tube 11 is pre-inserted into the tumor. Then, the sampling needle 2 is slowly inserted along the channel of the puncture needle sheath 1 until the sampling groove 211 at the tip of the first needle core 21 reaches the tumor tissue. By slightly rotating and moving the sampling needle 2 back and forth, the target tissue is guided into the sampling groove 211. Next, the doctor pushes the puncture needle sheath 1 forward, using its sharp edge to cut the tissue located in the sampling groove 211, ensuring the tissue sample is completely preserved in the sampling groove 211. Then, the sampling needle 2 is carefully withdrawn from the puncture needle sheath 1, completing the sampling operation.

[0034] When separating residual tissue cells within the puncture needle sheath 1, the separating needle 3 is inserted into the puncture needle sheath 1. Initially, the two scrapers 33 are squeezed together by the inner wall of the needle tube 11. As the separating needle 3 penetrates deeper, the scrapers 33 are fully inserted into the needle tube 11. Due to the action of the elastic element 34, the scrapers 33 are pushed outwards and tightly adhere to the inner wall of the needle tube 11. The separating needle 3 is then continuously pushed forward, and the two scrapers 33 advance along the inner wall of the needle tube 11, scraping the attached tumor tissue forward until it is pushed out from the tip of the needle tube 11, thus successfully separating the residual tissue cells and providing a reliable sample for subsequent testing and other operations, avoiding waste of tissue samples.

[0035] In summary, this utility model discloses a tumor sampling device that facilitates tumor separation, featuring a uniquely designed separation needle. Its scraper initially conforms to the inner wall of the needle tube and enters close together; upon deeper insertion, it adheres tightly to the inner wall under the action of an elastic element to scrape tissue, effectively overcoming the problem of traditional scrapers not being able to achieve a tight fit. The scraper of the separation needle is a frustum-shaped tube, smaller at the front and larger at the back, combining guiding and efficient separation functions. It can completely expel attached tissue from the needle tube, avoiding tissue waste, providing a reliable sample for subsequent testing, and improving diagnostic efficiency. Its innovative design overcomes the shortcomings of existing technologies, providing strong support for tumor diagnosis and treatment.

[0036] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A tumor sampling device for facilitating tumor separation, characterized in that: The device includes a puncture needle sheath, a sampling needle, and a separation needle. The separation needle includes a second needle core, a third needle seat, a scraper, and an elastic element. The third needle seat is fixed to the rear end of the second needle core. There are two scrapers, each in a semi-circular shape. The maximum outer diameter of the two scrapers combined into a circle matches the inner diameter of the needle tube. The elastic element is installed at the front end of the second needle core and has two force-applying parts. The two scrapers are respectively connected to the two force-applying parts, and the mating surfaces of the two scrapers are arranged opposite to each other. The two force-applying parts of the elastic element are used to push the two scrapers to opposite sides.

2. The tumor sampling device for facilitating tumor separation according to claim 1, characterized in that: The puncture needle sheath includes a needle tube and a first needle hub fixed to the rear end of the needle tube. The first needle hub is a hollow structure with an open rear end and communicating with the needle tube.

3. The tumor sampling device for facilitating tumor separation according to claim 1, characterized in that: The side of the syringe has several scale markings.

4. The tumor sampling device for facilitating tumor separation according to claim 1, characterized in that: The sampling needle includes a first needle core and a second needle seat fixed to the rear end of the first needle core, and a sampling groove is provided at the front of the first needle core.

5. A tumor sampling device for facilitating tumor separation according to claim 1, characterized in that: The second needle core has an assembly groove at its front end, and the elastic element is installed in the assembly groove.

6. A tumor sampling device for facilitating tumor separation according to claim 5, characterized in that: The elastic element is a leaf spring, the middle part of which is bent to form a curved portion that is assembled in the assembly groove. The portions of the leaf spring located on both sides of the curved portion are force-applying portions, and the two force-applying portions extend forward out of the assembly groove.

7. A tumor sampling device for facilitating tumor separation according to claim 6, characterized in that: The second needle core is equipped with a limiting member for preventing the leaf spring from moving forward out of the assembly slot.

8. A tumor sampling device for facilitating tumor separation according to claim 7, characterized in that: The limiting member is a round rod that is radially fixed to the second needle core and passes through the assembly groove, and the curved part is sleeved on the outside of the round rod.

9. A tumor sampling device for facilitating tumor separation according to claim 8, characterized in that: The second needle core has a mounting hole that extends radially through the second needle core, and the round rod is installed in the mounting hole.

10. A tumor sampling device for facilitating tumor separation according to claim 1, characterized in that: When the two scrapers are joined together, they will form a frustum shape that is smaller in the front and larger in the back.

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