A tissue puncture sampling needle and a sampling device containing the same

Abstract

The application discloses a tissue puncture sampling needle, wherein a main body is a hollow tubular structure, the main body is sequentially provided with a cutting area, a guiding area and a connecting area along an axis from front to back, one side of the cutting area is a cylindrical surface, the other side is an inclined surface, the cylindrical surface and the inclined surface intersect at a front end to form a needle tip structure, an outer edge of the needle tip structure is provided with a front end cutting edge, the guiding area is provided with an open slot in the overall length, a center line of the open slot is parallel to the axis of the main body, the center line of the open slot intersects with a center line of the inclined surface of the cutting area at a rear end of the inclined surface, a middle section cutting edge is arranged at an edge of the open slot, and an outer circumference of the connecting area is a smooth rod structure. The tissue puncture sampling needle can be used for biopsy of various organs such as kidneys, livers, lungs, breasts, thyroids, prostates, pancreases, testicles, uteruses, ovaries and body surfaces, can not only increase the sampling amount of tissues, but also can cut and extract sampling tissues through operation rotation, and can provide reliable guarantee for subsequent detection and diagnosis.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, and is a tissue puncture sampling needle and a sampling device containing the same, which can be applied to all puncture biopsies. BACKGROUND

[0002] Because many clinical typing methods cannot make a clear diagnosis, there are many deficiencies in judging prognosis, and the use of puncture biopsy is beneficial to making a clear diagnosis and guiding treatment, so puncture biopsy is one of the important bases for clinical operations. At present, the puncture needle sampling commonly used in clinical practice generally uses a forward and backward movement method to sample the target tissue. The disadvantage of this type of sampling is that the target tissue needs to be punctured repeatedly at the same position, which not only cannot obtain complete biopsy tissue but also increases the risk of infection at the puncture site. Because there is no special structure to limit the tissue after puncture is completed, when the operation part is moved backward to extract the tissue, less effective tissue can be extracted, which brings limitations to subsequent diagnosis and treatment. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a tissue puncture sampling needle and a sampling device containing the same. The tissue puncture sampling needle has a unique opening slot structure, which greatly increases the sampling amount. At the same time, in cooperation with the cutting edge on the opening slot, the tissue puncture sampling needle can extract as much complete puncture tissue as possible through forward and backward feeding and rotation, simplifies the sampling process, and the sampling device containing the sampling needle is convenient for doctors to operate, reduces the repeated puncture actions of doctors, and improves the sampling amount.

[0004] To solve the above problems, the specific technical scheme of the present application is as follows: a tissue puncture sampling needle, the main body is a hollow tubular structure, the main body is provided with a cutting zone, a guide zone and a connecting zone in sequence along the axis from front to back; one side of the cutting zone is a cylindrical surface, the other side is an inclined surface, the cylindrical surface and the inclined surface intersect at the front end to form a needle tip structure, the outer edge of the needle tip structure is provided with a front end cutting edge; the guide zone is provided with an opening slot on the whole length; the center line of the opening slot is parallel to the axis of the main body, and the center line of the opening slot intersects with the center line of the inclined surface of the cutting zone at the rear end of the inclined surface, a middle section cutting edge is arranged on the edge of the opening slot; the outer circumference of the connecting zone is a light pole structure.

[0005] A limiting zone is arranged between the guide zone and the connecting zone, the limiting zone is provided with a window structure on the whole length, the center line of the window structure coincides with the center line of the opening slot; when the width of the opening slot is A, the width B of the window structure is greater than A, and the window structure is connected with the end face of the opening slot through a round corner transition; a rear section cutting edge is arranged on the edge of the window structure.

[0006] The outer circumferences of the cutting zone and the guide zone are provided with a plurality of equally spaced ultrasonic recognition ring grooves, and the distance between two adjacent ultrasonic recognition ring grooves is L1.

[0007] The inner diameter of the guiding area is r2, the inner diameter of the limiting area is r3, and r3 is less than r2.

[0008] The limiting area and the connecting area are provided with a receiving area, and the receiving area is a hollow tubular structure.

[0009] The outer circumference of the limiting area and the receiving area is provided with a plurality of equally spaced ultrasonic identification ring grooves, and the spacing between two adjacent ultrasonic identification ring grooves is L2.

[0010] The receiving area and the connecting area are further provided with a group of guiding areas, limiting areas and receiving areas.

[0011] The front end of the limiting area window structure is provided with a barb.

[0012] A sampling device containing a tissue puncture sampling needle, a connector is connected at the rear end of the connecting area, and a rotating wheel is connected to the outer circumference of the connector.

[0013] The rear end of the connector is provided with a quick-change connector connected with external equipment.

[0014] In addition to the needle tip structure, the tissue puncture sampling needle of the present application also adopts a guiding area with an open slot structure, and a middle blade is provided, which realizes the rotation of the sampling needle after being inserted into the tissue, that is, it can be easily taken out, not only increases the biopsy sampling amount, but also ensures the sampling integrity as much as possible; compared with the traditional puncture sampling method, the same punctured tissue does not need to be punctured repeatedly, the operation frequency is reduced, and the risk of infection caused by repeated puncture is also avoided. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The structure diagram of the first embodiment of the tissue puncture sampling needle.

[0016] Figure 2 The front view of the first embodiment of the tissue puncture sampling needle.

[0017] Figure 3 The B-B sectional view of Figure 2

[0018] The C-C sectional view of Figure 4 Figure 2 The D-D sectional view of

[0019] Figure 5 Figure 2 The E-E sectional view of

[0020] Figure 6 The F-F sectional view of Figure 2

[0021] Figure 7 Figure 2 ​​​​​

[0022] Figure 8 A bottom view of Example 2 of the tissue puncture sampling needle.

[0023] Figure 9 A three-dimensional view of Example 3 of the tissue puncture sampling needle.

[0024] Figure 10 This is a structural diagram of the tissue puncture sampling device.

[0025] Figure 11 A partial cross-sectional view of a tissue puncture sampling device.

[0026] Figure 12 A schematic diagram illustrating an example of biopsy tissue entering the cutting zone.

[0027] Figure 13 A schematic diagram illustrating an example of a biopsy tissue entering the guide area structure.

[0028] Figure 14 A schematic diagram illustrating an example of a structure for biopsy tissue to enter the restricted area.

[0029] Figure 15 A schematic diagram illustrating a structure for biopsy tissue to enter the storage area.

[0030] Figure 16 This is a schematic diagram illustrating a single sampling example of tissue puncture.

[0031] Figure 17 This is a schematic diagram illustrating an example of multiple sampling sites or multiple times for tissue puncture sampling. Detailed Implementation

[0032] The tissue puncture sampling needle of this application can be used for biopsy of various organs such as the kidney, liver, lung, breast, thyroid, prostate, pancreas, testis, uterus, ovary, and body surface.

[0033] Example 1

[0034] like Figures 1 to 7 As shown, a tissue puncture sampling needle has a hollow tubular structure as its main body 10. The main body 10 is provided with a cutting area 1, a guiding area 2, a limiting area 3, a storage area 4 and a connecting area 5 along the axis from front to back. One side of the cutting area 1 is a cylindrical surface and the other side is an inclined surface. The cylindrical surface and the inclined surface intersect at the front end to form a needle tip structure. The outer edge of the needle tip structure is provided with a front cutting edge 1-1. The needle tip structure can easily pierce into the sampled tissue, and the front cutting edge 1-1 can easily cut the tissue.

[0035] The guide area 2 is provided with an open slot 2-1 in the whole length, so that the radial section of the guide area 2 is in the shape of C; the center line of the open slot 2-1 is parallel to the axis of the main body 10, and the center line of the open slot 2-1 intersects with the center line of the inclined surface of the cutting area 1 at the rear end of the inclined surface, and a middle section cutting edge 2-2 is arranged at the edge of the open slot 2-1; due to the open slot 2-1 arranged on the guide area 2, the front end cutting edge 1-1 of the needle tip structure of the cutting area 1 enters the tissue from a point to the curved cutting, and when entering the guide area 2, the cutting tissue section is in the shape of C and enters the guide area 2; due to the arrangement of the open slot 2-1, the tension of the cutting tissue is released at the open slot 2-1, so that the extrusion of the tissue to the inner wall of the guide area 2 is reduced, and the tissue enters the guide area 2 from the cutting area 1 more smoothly.

[0036] The limiting area 3 is provided with a window structure 3-1 in the whole length, the center line of the window structure 3-1 coincides with the center line of the open slot 2-1, and the window structure 3-1 is in communication with the open slot 2-1; when the width of the open slot 2-1 is A, the width B of the window structure 3-1 is greater than A, and the window structure 3-1 is connected with the end surface of the open slot 2-1 through a round corner transition; a rear section cutting edge 3-2 is arranged at the edge of the window structure 3-1; when the inner diameter of the guide area 2 is r2, the inner diameter of the limiting area 3 is r3, and r3 is less than r2; when the tissue enters the limiting area 3 from the guide area 2, the inner hole size becomes smaller, so that the tissue tension becomes larger and is released at the window structure 3-1 of the limiting area 3, and a tissue protrusion is formed at the window structure 3-1, which can provide sufficient separation force for subsequent separation of the tissue.

[0037] The limiting area 3 is connected with the outer circumferential light rod structure connection area 5 through the hollow tubular receiving area 4. After each tissue cutting, the tissue can not be taken out immediately, but can be smoothly entered into the receiving area 4 through repeated operation, the receiving area 4 can accommodate more tissues, and the tissue can be extracted in multiple positions or multiple times, and the integrity of the extracted tissue can be ensured as much as possible.

[0038] When the tissue puncture sampling needle is used in an ultrasonic environment, a plurality of ultrasonic identification ring grooves 6 are arranged at equal intervals on the outer circumference of the cutting area 1 and the guide area 2, and the interval between two adjacent ultrasonic identification ring grooves 6 is L1; a plurality of ultrasonic identification ring grooves 6 are arranged at equal intervals on the outer circumference of the limiting area 3 and the receiving area 4, and the interval between two adjacent ultrasonic identification ring grooves 6 is L2. By setting different values of L1 and L2, the two ultrasonic identification ring grooves 6 can also be arranged in spiral line type and parallel ring structure respectively as a distinction, so that the outer circumferential edge of the front end of the limiting area 3 can be used as a boundary line, and the specific position of the puncture can be observed obviously under the ultrasonic endoscope, thereby providing a real-time position basis for the puncture sampling.

[0039] Embodiment two

[0040] As Figure 8As shown, when the extracted lesion tissue range is large, the storage area 4 between the tissue puncture sampling needle and the connecting area 5 is also provided with a set of guide area 2, limiting area 3 and storage area 4, so as to ensure that the tissue can enter the hole in the main body 10 deeper, and the second guide area 2 and the window structure 3-1 of the limiting area 3 can release the tension of the tissue twice, and the bidirectional opening window can provide more release tension space, form a blocking phenomenon, so as to ensure that the punctured tissue is extracted as much as possible. The rest of the structure is the same as example one.

[0041] Example three

[0042] As shown in the drawings, Figure 9 The front end of the window structure 3-1 of the limiting area 3 is provided with a barb 3-3, which is symmetrically arranged on both sides of the window structure 3-1, and the tooth tip is backward. When the tissue puncture sampling needle is pulled out, the tip of the barb 3-3 can provide a resistance to the tissue, preventing the sampling tissue in the sampling needle from sliding out and causing sampling failure.

[0043] As shown in the drawings, Figure 10 and Figure 11 A tissue puncture sampling device, a connecting joint 7 is connected to the rear end of the connecting area 5 of the tissue puncture sampling needle, and a rotating wheel 8 is connected to the outer circumference of the connecting joint 7. By rotating the rotating wheel 8, the rotating operation of the tissue puncture sampling needle is controlled; the rear end of the connecting joint 7 is provided with a quick-change joint 7-1 connected with external equipment, realizing the universality of the tissue puncture sampling device. As shown in the drawings, Figure 9 The left end of the connecting joint 7 is provided with a process positioning hole 7-3, so that the connecting area 5 of the tissue puncture sampling needle is connected firmly with the connecting joint 7.

[0044] The steps of puncture sampling by using the above-mentioned tissue puncture sampling device are as follows:

[0045] I. The extracted tissue enters the cutting area: as shown in the drawings, Figure 12 When the tissue puncture sampling device is ready for puncture biopsy, the needle tip structure and the front blade 1-1 can easily cut the sample tissue, and the cut tissue enters the central hole;

[0046] II. The extracted tissue enters the guide area: as shown in the drawings, Figure 13 The opening slot 2-1 of the guide area 2 can release part of the tension of the tissue, so that the tissue can enter more smoothly in the process;

[0047] III. The extracted tissue enters the limiting area: as shown in the drawings, Figure 14 The tissue puncture sampling part continues to move forward, and the tissue enters the limiting area 3 from the guide area 2, the hole diameter becomes smaller, and the tissue can further release the tension through the window structure 3-1, and the protruding tissue is formed at the edge of the window structure 3-1, which can play a certain detent effect for the subsequent separation of the sample;

[0048] Four, the extracted tissue enters the storage area: as shown in Figure 15 The tissue puncture sampling part moves forward again into the storage area 4, and the inner wall of the storage area 4 extrudes the tissue again to increase the tension around the tissue.

[0049] Five, the rotating operation part extracts the tissue: as shown in Figure 16 After the tissue enters the storage area 4, the rotating wheel 8 is rotated to drive the front-end tissue puncture sampling needle to rotate synchronously, the middle segment blade 2-2 of the limiting area 2 and the rear segment blade 3-2 of the limiting area 3 are used to rotate and cut the uncut tissue located in the opening slot 2-1 and the window structure 3-1, and after cutting, the extracted tissue is further limited by the front-end edge clamping effect of the window structure 3-1 of the limiting area 3. Then the joint 7 is pulled backward to drive the tissue puncture sampling needle to move backward, at this time the extracted tissue is separated at the needle tip position and stored in the inner hole of the tissue puncture sampling needle body 10.

[0050] Six, multi-position or multi-time puncture biopsy: as shown in Figure 17 The storage area 4 has enough storage inner cavity to realize multi-position or multi-time puncture biopsy of the target tissue. The action of each puncture biopsy is to first push the joint 7 forward, then rotate the rotating wheel 8 to drive the segments of the tissue puncture sampling needle to further rotate and cut the cut tissue, and complete single sampling. When multi-position or multi-time puncture biopsy is performed, only the above-mentioned actions need to be repeated, and the extracted samples will be sequentially stored in the inner cavity of the storage area 4.

Claims

1. A tissue puncture sampling needle, characterized in that: The main body (10) is a hollow tubular structure. The main body (10) is provided with a cutting area (1), a guiding area (2) and a connecting area (5) from front to back along the axis. One side of the cutting area (1) is a cylindrical surface and the other side is an inclined surface. The cylindrical surface and the inclined surface intersect at the front end to form a needle tip structure. The outer edge of the needle tip structure is provided with a front cutting edge (1-1). The guiding area (2) is provided with an opening groove (2-1) along its overall length. The center line of the opening groove (2-1) is parallel to the axis of the main body (10), and the center line of the opening groove (2-1) intersects with the center line of the inclined surface of the cutting area (1) at the rear end of the inclined surface. A middle cutting edge (2-2) is provided at the edge of the opening groove (2-1). The outer circumference of the connecting area (5) is a smooth rod structure. A limiting area (3) is provided between the guiding area (2) and the connecting area (5). The limiting area (3) has a window structure (3-1) along its overall length. The center line of the window structure (3-1) coincides with the center line of the opening groove (2-1). When the width of the opening groove (2-1) is A, the width B of the window structure (3-1) is greater than A, and it is connected to the end face of the opening groove (2-1) with a rounded transition. A rear cutting edge (3-2) is provided on the edge of the window structure (3-1). When the inner diameter of the guiding area (2) is r2, the inner diameter of the limiting area (3) is r3, and r3 is less than r2.

2. The tissue puncture sampling needle as described in claim 1, characterized in that: The outer circumference of the cutting area (1) and the guiding area (2) is provided with a number of equally spaced ultrasonic identification ring grooves (6), and the distance between two adjacent ultrasonic identification ring grooves (6) is L1.

3. A tissue puncture sampling needle as described in claim 1 or 2, characterized in that: A storage area (4) is provided between the limiting area (3) and the connecting area (5), and the storage area (4) is a hollow tube.

4. The tissue puncture sampling needle as described in claim 3, characterized in that: The outer circumference of the limiting area (3) and the storage area (4) is provided with a number of equally spaced ultrasonic identification ring grooves (6), and the distance between two adjacent ultrasonic identification ring grooves (6) is L2.

5. A tissue puncture sampling needle as described in claim 3, characterized in that: Between the storage area (4) and the connecting area (5), there is also a set of guide area (2), limit area (3) and storage area (4).

6. The sampling device for the tissue puncture sampling needle as described in claim 1, characterized in that: The front end of the limit area (3) window structure (3-1) shown is provided with a barb (3-3).

7. A sampling device comprising the tissue puncture sampling needle of claim 1, characterized in that: Connect the connector (7) at the rear end of the connecting area (5), and connect the rotating wheel (8) to the outer circumference of the connector (7).

8. The sampling device as described in claim 7, characterized in that: The connector (7) is provided with a quick-connect connector (7-1) at the rear end for connection with external equipment.

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