Soft tissue tumor needle biopsy needle device

Abstract

The invention discloses a soft tissue tumor needle biopsy needle device which comprises a needle tube provided with a piston cavity and a piston axially sliding in an inner cavity of the piston cavity, the piston is connected with a driving part extending to the outside of the needle tube, and a one-way breathable one-way valve tube is arranged on one side of the lower portion of the piston cavity. The lower end of the needle tube is sequentially connected with a pressure stabilizing tube and a buffer tube connected with the pressure stabilizing tube, a needle body is arranged at the lower end of the buffer tube, the pressure stabilizing tube comprises a tube body connected with the needle tube and the buffer tube, the upper portion and the lower portion of the tube body are respectively connected with a fixing plate provided with a plurality of air holes and a sealing block provided with a spherical adaptive through hole, and the lower portion of the fixing plate is fixedly connected with a spring. And the lower end of the spring is fixedly connected with a steel ball matched with the spherical adaptive through hole. According to the tumor tissue sampling needle, normal continuous sampling can be guaranteed, fragmented tumor tissue backflow can be effectively avoided, the total quantity of continuously obtained tumor tissue samples is guaranteed, the needle body can be effectively fixed, shaking of the needle body during continuous sampling is avoided, and safe puncture operation is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of tumor biopsy technology, and more particularly to a soft tissue tumor biopsy needle device. Background Technology

[0002] Soft tissue tumors are diseases that seriously endanger human health and life. Early detection, accurate pathological diagnosis, and timely treatment have a significant impact on prognosis, and pathological diagnosis plays a crucial role in the selection of treatment plans. Among these, CT-guided biopsy is a special examination technique that uses a specially designed biopsy needle to accurately penetrate the target lesion under the guidance of CT images to obtain cytological or histological material to clarify the nature of the lesion. This technique has advantages such as precise localization, high detection rate, few complications, and rapid postoperative patient recovery, and has been widely used in the qualitative diagnosis of various diseases in clinical practice. For suspected tumor lesions, biopsy needle sampling can determine their nature, type, and degree of malignancy, which helps in formulating treatment plans.

[0003] Clinically common soft tissue tumors are often small (maximum diameter only 2-5 cm), while biopsy needles are generally 8-15G (inner diameter greater than 1.3 mm). A single puncture yields a limited sample volume, requiring multiple punctures to obtain sufficient tissue. However, repeated sampling can easily damage surrounding tissues, causing unnecessary pain for the patient. Therefore, patent document CN118593023B discloses a "soft tissue tumor biopsy needle device" that can continuously aspirate the target tissue into the needle's internal channel without requiring multiple punctures. To prevent the obtained tumor tissue from being pushed out of the sampling channel by air pressure when the piston 6 moves distally, this technical solution incorporates a blocking structure 3 within the sampling channel of the needle 2. However, the tumor tissue obtained in the sampling channel is still connected to the cylinder cavity. During continuous sampling, under the air pressure when the piston 6 moves to the distal end, the blocking structure 3 cannot effectively prevent the target object in the sampling channel from being pushed out of the distal outlet of the sampling channel by the gas pressure. The tumor tissue will still be pushed out of the sampling channel by the air pressure, which is not conducive to the normal progress of continuous puncture. Moreover, when continuously sampling, the device is easy to shake when held, which will also cause soft tissue damage around the puncture site. Summary of the Invention

[0004] To address the technical problems of existing technologies, such as tumor tissue being pushed out of the sampling channel by air pressure during continuous sampling, which is not conducive to the normal conduct of continuous puncture, and the soft tissue damage around the puncture site caused by shaking during continuous sampling, the present invention provides the following technical solution.

[0005] This invention discloses a soft tissue tumor biopsy needle device, comprising a needle tube with a piston chamber and a piston that slides axially within the piston chamber. The piston is connected to a drive component extending to the outside of the needle tube. A one-way venting valve tube is provided on one side of the lower part of the piston chamber. A pressure stabilizing tube and a buffer tube with a needle body at the lower end connected to the pressure stabilizing tube are sequentially connected to the lower end of the needle tube. The pressure stabilizing tube includes a tube body connected to the needle tube and the buffer tube. A fixing plate with a plurality of vent holes and a sealing block with a spherical fitting through hole are respectively connected to the upper and lower parts of the tube body. A spring is fixedly connected to the lower part of the fixing plate, and a steel ball matching the spherical fitting through hole is fixedly connected to the lower end of the spring.

[0006] As a further technical solution, the lower inner cavity of the needle body is provided with several sets of first anti-backflow components and second anti-backflow components arranged in a stepped manner along the axial direction.

[0007] As a further technical solution, each set of the first anti-backflow component and the second anti-backflow component is arranged at an upward and downward angle relative to each other along the needle body axis.

[0008] As a further technical solution, the first anti-backflow component is provided with a guide side facing the axis of the needle body and a blocking side perpendicular to the axis of the needle body.

[0009] As a further technical solution, the needle body is provided with a positioning clamping member that adheres to human skin on its outer periphery. The positioning clamping member includes a first clamping piece and a second clamping piece that are arranged opposite to each other and are provided with needle body receiving grooves.

[0010] As a further technical solution, the first clip and the second clip are respectively provided with a number of protrusions and a number of grooves that engage with each other on their opposite sides.

[0011] As a further technical solution, there are two protrusions and two grooves, which are located on both sides of the needle body receiving groove.

[0012] As a further technical solution, the first clip and the second clip are each provided with a plurality of adhesive pieces that adhere to the patient's skin.

[0013] As a further technical solution, the inner cavity of the buffer tube is provided with a mesh plate.

[0014] As a further technical solution, a sealing gasket is provided on the upper part of the voltage regulator tube.

[0015] The beneficial effects of this invention are as follows: A one-way valve tube is provided on one side of the lower part of the piston chamber, and a pressure stabilizing tube is installed between the needle tube and the needle body. A fixing plate and a sealing block with a spherical fitting through-hole are respectively connected to the upper and lower parts of the pressure stabilizing tube. A steel ball is fixedly connected to the lower end of a spring at the lower part of the fixing plate. Under the elastic force of the spring, the steel ball can seal the spherical fitting through-hole, isolating the air in the needle body cavity from the piston chamber. Therefore, when the piston moves towards the needle body, the air in the piston chamber is discharged through the one-way valve tube, and the steel ball seals the spherical fitting through-hole, preventing communication between the needle body cavity and the piston chamber. Tumor tissue can be effectively retained within the needle body. Only when the piston moves away from the needle body, generating negative pressure, will the negative pressure cause the steel ball to overcome the spring force, disengage from the spherical fitting through-hole, and allow the needle body cavity to communicate with the piston chamber through the spherical fitting through-hole. Under negative pressure, tumor tissue can be aspirated again, ensuring the normal continuous sampling process. Furthermore, the needle body is equipped with multiple sets of first and second anti-backflow components arranged in a tiered manner along its axial direction. These components alternately prevent the backflow of tumor tissue, effectively avoiding the reflux of fragmented tumor tissue and ensuring a continuous total amount of tumor tissue sample obtained. Simultaneously, a positioning clamp is located on the periphery of the needle body, which adheres to the patient's skin. This clamp secures the needle to the patient's skin surface and effectively stabilizes it, preventing movement during continuous sampling and ensuring the safety of the puncture procedure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the soft tissue tumor puncture biopsy needle device of the present invention; Figure 2 This is an exploded schematic diagram of the soft tissue tumor puncture biopsy needle device of the present invention; Figure 3 This is a cross-sectional schematic diagram of the soft tissue tumor puncture biopsy needle device of the present invention; Figure 4 This is a cross-sectional schematic diagram of the pressure stabilizing tube of the soft tissue tumor puncture biopsy needle device of the present invention; Figure 5 This is a cross-sectional schematic diagram of the needle body of the soft tissue tumor puncture biopsy needle device of the present invention; Figure 6 This is a schematic diagram of the positioning and clamping component of the soft tissue tumor puncture biopsy needle device of the present invention; In the diagram: 1-Needle tube; 101-Piston chamber; 2-Driver; 3-Piston; 4-One-way valve tube; 5-Needle body; 6-Pressure stabilizing tube; 601-Tube body; 602-Fixing plate; 603-Ventilation hole; 604-Spring; 605-Steel ball; 606-Sealing block; 607-Spherical adapter through hole; 608-Sealing gasket; 7-Buffer tube; 701-Mesh plate; 8-Positioning clamping component; 801-First clamping piece; 802-Second clamping piece; 803-Protrusion; 804-Groove; 805-Needle body receiving groove; 806-Adhesive piece; 9-First anti-backflow component; 901-Guiding side; 902-Blocking side; 10-Second anti-backflow component. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0018] In the description of this invention, it should be understood that the terms "upper" and "lower" are based on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0019] like Figure 1 As shown, this invention discloses a soft tissue tumor biopsy needle device, comprising a needle tube 1 with a piston cavity 101 and a piston 3 that slides axially within the piston cavity 101. The space between the piston 3 and the lower end of the needle tube 1 forms the piston cavity 101. Two handles are provided on the upper part of the outer wall of the needle tube 1. The needle tube 1 is made of medical-grade stainless steel, while the piston 3 is made of existing rubber material. The piston 3 is connected to a drive component 2 extending to the outside of the needle tube 1. In embodiments of this invention, the drive component 2 employs existing pneumatic and electric drive structures to drive the piston 3 to move within the piston cavity 101, creating negative pressure in the piston cavity 101 to aspirate tumor tissue. Since the drive component 2 is an existing structure, it will not be described in detail here.

[0020] like Figure 1 and Figure 2As shown, in a preferred embodiment, a one-way ventilated one-way valve tube 4 is provided on one side of the lower part of the piston chamber 101. A gas one-way valve is provided inside the one-way valve tube 4, allowing air in the piston chamber 101 to be discharged through the one-way valve tube 4, while preventing external air from entering the piston chamber 101 through the one-way valve tube 4. A pressure stabilizing tube 6 and a buffer tube 7 connected to the pressure stabilizing tube 6 are sequentially connected to the lower end of the needle tube 1. A needle body 5 is provided at the lower end of the buffer tube 7.

[0021] The buffer tube 7 is fixedly connected to the needle body 5. The needle body 5 is used to puncture the soft tissue tumor and aspirate tumor tissue samples. In most cases, the tumor tissue samples remain in the inner cavity of the needle body 5. In a few cases, when a large number of samples are taken, the tumor tissue samples can be moved into the buffer tube 7 for temporary storage. In this case, the inner cavity of the buffer tube 7 is equipped with a mesh plate 701, which is used to prevent the tumor tissue samples from entering the pressure stabilizing tube 6. The pressure stabilizing tube 6 is used to separate the inner cavity of the needle body 5 from the piston cavity 101. That is, air in the piston cavity 101 cannot enter the inner cavity of the needle body 5. When a negative pressure is generated in the piston cavity 101, the pressure stabilizing tube 6 can connect the inner cavity of the needle body 5 and the piston cavity 101. Under the action of negative pressure, the needle body 5 can continuously sample without repeated punctures.

[0022] like Figure 3 and Figure 4 As shown, in a preferred embodiment, the voltage stabilizing tube 6 includes a tube body 601 connected to the needle tube 1 and the buffer tube 7. The upper end of the tube body 601 is threaded to the lower end of the needle tube 1, and the lower end of the tube body 601 is threaded to the upper end of the buffer tube 7, ensuring the stability and sealing of the connection. A fixing plate 602 and a sealing block 606 are respectively connected to the upper and lower parts of the tube body 601. A sealing gasket 608 is provided on the upper part of the voltage stabilizing tube 6, located above the fixing plate 602, to ensure the sealing between the upper end of the voltage stabilizing tube 6 and the needle tube 1. The fixing plate 602 and the sealing block 606 are respectively fixed to the inner wall of the tube body 601, and there is a certain gap between them.

[0023] The fixing plate 602 has multiple vent holes 603 radially arranged, but no vent holes 603 are provided in the middle of the fixing plate 602. The sealing block 606 has a spherical adapter through hole 607. When the spherical adapter through hole 607 is connected to the multiple vent holes 603, the inner cavity of the needle body 5 is connected to the piston cavity 101; when the spherical adapter through hole 607 is not connected to the multiple vent holes 603, the inner cavity of the needle body 5 is also not connected to the piston cavity 101. At this time, a spring 604 is fixedly connected to the lower part of the fixing plate 602, and a steel ball 605 is fixedly connected to the lower end of the spring 604. The shape of the steel ball 605 matches the upper part of the spherical adapter through hole 607. Under the elastic force of the spring 604, the steel ball 605 presses against the upper part of the spherical adapter through hole 607, so that the spherical adapter through hole 607 is not connected to the multiple vent holes 603, and the inner cavity of the needle body 5 is also not connected to the piston cavity 101.

[0024] During sampling, driven by the drive element 2, the piston 3 moves away from the needle body 5. Air does not enter the one-way valve tube 4, creating a negative pressure in the piston chamber 101. This negative pressure causes the steel ball 605 to overcome the elastic force of the spring 604 and disengage from the spherical adapter through-hole 607, allowing the inner cavity of the needle body 5 to connect with the piston chamber 101 through the spherical adapter through-hole 607. Under the action of the negative pressure, the needle body 5 can aspirate tumor tissue samples. Since the amount of sample aspirated at one time is insufficient, the drive element 2 will move the piston 3 towards the needle body 5. Under the elastic force of the spring 604... The steel ball 605 seals the spherical adapter through hole 607, separating the air in the inner cavity of the needle body 5 from the air in the piston chamber 101. The air in the piston chamber 101 is discharged through the one-way valve tube 4. Because the steel ball 605 seals the spherical adapter through hole 607, the inner cavity of the needle body 5 is not connected to the piston chamber 101, and the tumor tissue can be effectively kept in the inner cavity of the needle body 5. Then, driven by the drive component 2, the piston 3 moves away from the needle body 5. Under the action of negative pressure, the needle body 5 can again aspirate the tumor tissue sample, ensuring the normal continuous sampling.

[0025] like Figure 5 As shown, in a preferred embodiment, the lower inner cavity of the needle body 5 is provided with multiple sets of first anti-backflow elements 9 and second anti-backflow elements 10 arranged in a stepped manner along the axial direction. These multiple sets of first anti-backflow elements 9 and second anti-backflow elements 10 are alternately separated to prevent the backflow of tumor tissue, effectively avoiding the reflux of fragmented tumor tissue and further ensuring the total amount of tumor tissue sample continuously obtained. In this embodiment, each set of first anti-backflow elements 9 and second anti-backflow elements 10 is inclined upwards and downwards relative to each other along the axial direction of the needle body 5. The tumor tissue already aspirated by the needle body 5 moves and is temporarily stored within the needle body 5 like an S-curve, preventing tumor tissue reflux.

[0026] In a preferred embodiment, the first anti-backflow element 9 and the second anti-backflow element 10 have the same structure; here, only the first anti-backflow element 9 will be described in detail. The first anti-backflow element 9 has a guide side 901 facing the axis of the needle body 5 and a blocking side 902 perpendicular to the axis of the needle body 5. The guide side 901 extends obliquely from the inner wall of the needle body 5 towards the axis of the needle body 5, and the surface of the blocking side 902 is perpendicular to the axis of the needle body 1. During sampling, the piston 3 moves away from the needle body 5. Under negative pressure, the tumor tissue aspirated by the needle body 5 moves along the multiple guide sides 901 towards the buffer tube 7. When the piston 3 moves towards the needle body 5, the multiple alternating blocking sides 902 can block the backflow of tumor tissue, preventing tumor tissue reflux.

[0027] like Figure 6As shown, in a preferred embodiment, to prevent the needle body 5 from shaking during continuous sampling, a positioning clamp 8 is provided on the outer periphery of the needle body 5 and adheres to the human skin. The positioning clamp 8 includes a first clamp 801 and a second clamp 802 arranged opposite to each other. The first clamp 801 and the second clamp 802 are engaged and connected. Both the first clamp 801 and the second clamp 802 are provided with needle body receiving grooves 805. The two needle body receiving grooves 805 can accommodate the needle body 5 after they are connected. The first clamp 801 and the second clamp 802 are respectively provided with two adhesive pieces 806 that adhere to the patient's skin. After the first clamp 801 and the second clamp 802 are engaged and connected to accommodate the needle body 5, the adhesive pieces 806 adhere to the patient's skin, thus completing the fixation of the needle body 5 by the positioning clamp 8 and preventing the needle body 5 from shaking during continuous sampling.

[0028] In a preferred embodiment, the first clip 801 and the second clip 802 are respectively provided with a plurality of protrusions 803 and a plurality of grooves 804 that engage with each other on opposite sides. In this embodiment, there are two protrusions 803 and two grooves 804, which are located on both sides of the needle body receiving groove 805. The first clip 801 and the second clip 802 position the needle body 5 in the needle body receiving groove 805 from both sides of the needle body 5, and the protrusions 803 engage with the grooves 804, thus completing the connection and fixation of the first clip 801 and the second clip 802. Then, the adhesive piece 806 is adhered to the patient's skin, thus completing the fixation of the needle body 5 by the positioning clamp 8.

[0029] The preferred embodiments and examples of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments and examples. Within the scope of knowledge possessed by those skilled in the art, various changes or equivalent substitutions can be made without departing from the concept of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A soft tissue tumor puncture biopsy needle device, comprising a needle tube (1) provided with a piston cavity (101) and a piston (3) axially sliding in the piston cavity (101), the piston (3) being connected with a driving member (2) extending to the outside of the needle tube (1), one side of the lower part of the piston cavity (101) being provided with a one-way valve tube (4) allowing one-way air permeation, characterized in that: The needle tube (1) lower end is connected with a buffer tube (7) with a needle body (5) at the lower end and a pressure stabilizing tube (6) connected with the buffer tube (7), the pressure stabilizing tube (6) comprises a tube body (601) connected with the needle tube (1) and the buffer tube (7), the upper and lower parts of the tube body (601) are connected with a fixed plate (602) provided with a plurality of air holes (603) and a sealing block (606) provided with a spherical matching through hole (607) respectively, the lower part of the fixed plate (602) is fixedly connected with a spring (604), the lower end of the spring (604) is fixedly connected with a steel ball (605) matched with the spherical matching through hole (607).

2. The soft tissue tumor core biopsy needle device of claim 1, wherein: The needle body (5) is provided with a plurality of groups of first anti-reflux elements (9) and second anti-reflux elements (10) arranged in steps in the axis direction of the inner cavity of the lower part of the needle body (5).

3. The soft tissue tumor core biopsy needle device of claim 2, wherein: Each group of the first anti-reflux elements (9) and the second anti-reflux elements (10) are oppositely arranged in the axis direction of the needle body (5).

4. The soft tissue tumor core biopsy needle device of claim 2, wherein: The first anti-reflux element (9) is provided with a guide side (901) facing the axis direction of the needle body (5) and a blocking side (902) perpendicular to the axis direction of the needle body (5).

5. The soft tissue tumor core biopsy needle apparatus of claim 1, wherein: The outer periphery of the needle body (5) is provided with a positioning and clamping element (8) attached to the skin of the human body, the positioning and clamping element (8) comprises a first clamping piece (801) and a second clamping piece (802) oppositely arranged and each provided with a needle body accommodating groove (805).

6. The soft tissue tumor core biopsy needle device of claim 5, wherein: The opposite sides of the first clamping piece (801) and the second clamping piece (802) are respectively provided with a plurality of protrusions (803) and a plurality of grooves (804) connected with each other.

7. The soft tissue tumor core biopsy needle device of claim 6, wherein: The protrusions (803) and the grooves (804) are both two and are respectively located on both sides of the needle body accommodating groove (805).

8. The soft tissue tumor core biopsy needle device of claim 5, wherein: The first clamping piece (801) and the second clamping piece (802) are respectively provided with a plurality of adhesive pieces (806) adhered to the skin of the patient.

9. The soft tissue tumor core biopsy needle apparatus of claim 1, wherein: The inner cavity of the buffer tube (7) is provided with a mesh plate (701).

10. The soft tissue tumor core biopsy needle apparatus of claim 1, wherein: The upper part of the pressure stabilizing tube (6) is provided with a sealing gasket (608).

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