Concentric biopsy needle for mammary gland puncture
By using a concentric biopsy needle with concentric arrangement of inner and outer needles and a limiting structure design, the problems of needle jamming and friction are solved, achieving efficient breast tissue sampling.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-28
- Publication Date
- 2026-03-31
AI Technical Summary
Existing breast biopsy needles are prone to getting stuck between the inner and outer needles, leading to functional failure, and the friction that produces debris may cause allergic reactions.
Design a concentric biopsy needle with inner and outer needles arranged concentrically. Samples are taken by impacting the biopsy assembly with a firing device, avoiding direct contact between the inner and outer needles. A limiting structure and slide rail design are adopted to ensure smooth movement of the inner and outer needles.
It improves the efficiency of the inner and outer needles, avoids the generation of frictional debris, extends the equipment life and improves sampling efficiency.
Smart Images
Figure CN224056013U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of medical device technology, specifically relating to a concentric biopsy needle for breast puncture. Background Technology
[0002] Breast tissue biopsy needles are used for clinical biopsy sampling of breast tissue. The biopsy needle is inserted into the lesion site to take a sample. Tissue is sampled through puncture, which achieves the purpose of minimally invasive surgery and avoids large incisions for sampling.
[0003] However, the current mainstream biopsy needle structure, with the needle hub and button connected on one side, easily causes the inner and outer needles to get stuck, resulting in functional failure. Furthermore, the friction between the inner and outer needles can easily cause abrasive debris to fall off, which can easily cause allergic reactions if it enters the human body.
[0004] To address this issue, a concentric biopsy needle for breast puncture was designed to overcome the aforementioned problems. Utility Model Content
[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a concentric biopsy needle for breast puncture that is simple and reasonable in structure, practical, convenient and efficient.
[0006] This utility model is achieved through the following technical solution: a concentric biopsy needle for breast puncture, the biopsy needle is composed of an outer shell, an inner shell, a biopsy component, and a firing device. The inner shell is installed inside the outer shell, and the biopsy component is installed inside the inner shell. A firing pin is installed at the front end of the biopsy component. The front part of the firing pin passes through the outer shell and the inner shell and is exposed at the front of the outer shell. A protective sleeve is installed on the exposed part. The rear end of the biopsy component is provided with a firing device, which strikes the biopsy component to perform the biopsy operation.
[0007] Preferably, the outer shell has an L-shaped opening at the front, into which a first displacement button and a second displacement button are inserted and installed. The first displacement button and the second displacement button are tightly attached to the inner shell and connected and fixed to the biopsy assembly inside the inner shell. The bottom of the outer shell is located in the middle position, and a front slot, a middle slot, and a rear slot are provided at the front and rear to fix the inner shell in the middle position of the outer shell. A certain gap is left between the inner shell and the outer shell on both sides for placing the first displacement button and the second displacement button. A limiting strip is installed on the lower inner side of the outer shell on opposite side walls as a moving track for the first displacement button and the second displacement button. A firing button is also provided on one side of the outer shell.
[0008] Preferably, the firing button is connected to the firing device at the rear via a connecting rod. The firing device consists of a tailstock and a firing block. The tailstock is embedded in a groove arranged at the rear of the housing and forms an integral part with the tail of the housing. The front is connected to the firing block via a connecting block. The firing block faces the biopsy component. The firing device is provided with a limit block.
[0009] Preferably, the limiting block is installed above the connecting block between the tailstock and the firing block, and its two sides protrude through the through holes on both sides of the outer shell. Inside the outer shell, a protruding limiting protrusion is provided on one side of the limiting block. The limiting block has two grooves arranged left and right on one side of the limiting protrusion. A limiting through hole is provided on the limiting block. A limiting strip is provided on the tailstock that can pass through the limiting through hole. When the limiting protrusion is engaged in the groove on the left, the limiting through hole and the limiting strip are separated to restrict its movement. When the limiting protrusion is moved into the groove on the right, the limiting through hole and the limiting strip correspond. Moving the firing button forward pushes the tailstock forward, causing the firing block to fire the biopsy component. The tailstock has a support fixing strip that opens into a figure-eight shape on both sides of the connecting block. This support fixing strip abuts against the limiting posts on both sides inside the outer shell to prevent them from moving and has a spring-loaded function.
[0010] Preferably, the biopsy assembly is installed in the inner shell, which consists of a needle holder and an inner shell cavity. The needle holder is installed at the front of the inner shell cavity and is fixed by being engaged in the front slot. The middle and rear of the inner shell cavity are also fixed by being engaged in the middle slot and the rear slot, respectively. The inner shell cavity is provided with a top seat, a first limiting seat and a second limiting seat in sequence from front to back. The top seat, the first limiting seat and the second limiting seat form two independent chambers in the inner shell cavity, which hold two sets of biopsy assemblies respectively. Slide rails are also provided on the upper and lower sides between the top seat and the second limiting seat. When the two sets of biopsy assemblies are engaged in the first limiting seat and the second limiting seat through the slide rails, the two sets of biopsy assemblies are fired by the firing block at the rear. The biopsy assemblies slide out of the limiting seats to perform the firing operation.
[0011] Preferably, the two biopsy components are a first biopsy component and a second biopsy component. The first biopsy component is installed in the anterior chamber, and the second biopsy component is installed in the posterior chamber. The first biopsy component consists of a first needle seat, an outer needle, and a spring. The second biopsy component consists of a second needle seat, an inner needle, and a spring. The springs are respectively sleeved on the first needle seat and the second needle seat and located in the two chambers. The outer needle is installed in front of the first needle seat, and the inner needle is installed in front of the second needle seat. The outer needle is sleeved on the inner needle to form a firing needle. The two are arranged concentrically. The inner needle is longer than the outer needle, and a groove is opened in front of the inner needle near the needle tip to hook the tissue. An inclined blade is opened at the front needle tip of the outer needle.
[0012] Preferably, sliders are provided above and below the first and second needle holders, and are installed in slide rails in the inner cavity. A protruding guide block is installed on the upper slider. The guide block of the first needle holder is connected to a first displacement button, and the guide block of the second needle holder is connected to a second displacement button. A barb is provided behind the first and second needle holders for engaging with the first and second limiting seats. A top block is provided in front of the second needle holder. When the firing block pushes the second needle holder out of the second limiting seat, the top block in front of the second needle holder pushes the first needle holder out, driving the outer needle forward to cut the tissue in the inner needle groove.
[0013] Preferably, a limiting hole is provided between the first limiting seat and the second limiting seat, and a figure-eight shaped guide edge is provided on one side of the first needle seat and the second needle seat to facilitate the insertion of the barbs provided behind the first needle seat and the second needle seat.
[0014] Preferably, the outer shell consists of a left outer shell and a right outer shell, and the inner shell consists of a left outer inner shell and a right inner shell, all of which are fixed by snap-fit connections.
[0015] Preferably, the outer shell is also provided with an anti-slip layer.
[0016] The beneficial effects of this utility model are as follows:
[0017] The concentric biopsy needle for breast puncture designed in this invention effectively improves the shortcomings of existing biopsy needles, which are prone to friction between the inner and outer needles. The overall structure is simple and reasonable, making it easy for the inner and outer needles to work together to remove sample tissue. There is no friction between the inner and outer needles, which greatly improves work efficiency and extends the service life of the equipment itself. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0019] Figure 2 for Figure 1 A schematic diagram of the internal structure after the outer shell is removed.
[0020] Figure 3 for Figure 2 A schematic diagram of the internal structure after removing half of the outer shell and inner shell.
[0021] Figure 4 This is a top view of the internal structure of this utility model.
[0022] Figure 5 This is a bottom view of the present invention.
[0023] Figure 6 This is a front view of the internal structure of this utility model.
[0024] Figure 7This is a schematic diagram of the exploded structure of the outer and inner needles in this utility model. Detailed Implementation
[0025] To enable those skilled in the art to more clearly understand the purpose, technical solution and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.
[0026] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "horizontal", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0027] The present invention will now be described in detail with reference to the accompanying drawings: Figure 1-3 As shown, a concentric biopsy needle for breast puncture is provided. The biopsy needle consists of an outer shell 1, an inner shell 2, a biopsy assembly 3, and a firing device 4. The inner shell 2 is installed inside the outer shell 1, and the biopsy assembly 3 is installed inside the inner shell 1. A firing pin 5 is installed at the front end of the biopsy assembly 3. The front part of the firing pin 5 passes through the outer shell 1 and the inner shell 2 and is exposed at the front of the outer shell 1. A protective sleeve 6 is installed on the exposed part. The firing device 4 is provided at the rear end of the biopsy assembly 3. The biopsy operation is performed by striking the biopsy assembly 3 through the firing device 4.
[0028] The outer shell 1 has an L-shaped opening 7 at the front, into which a first displacement button 8 and a second displacement button 9 are inserted and installed. The first displacement button 8 and the second displacement button 9 are tightly attached to the inner shell 2 and connected and fixed to the biopsy component 3 inside the inner shell 2. The bottom of the outer shell 1 is located in the middle position, and a front slot 10, a middle slot 100, and a rear slot 110 are opened at the front and rear to fix the inner shell 2 in the middle position of the outer shell 1. A certain gap is left between the inner shell 1 and the outer shell 1 on both sides for placing the first displacement button 8 and the second displacement button 9. A limiting strip 11 is installed on the lower inner side of the outer shell 1 opposite to the two side walls as the moving track of the first displacement button 8 and the second displacement button 9. A firing button 12 is also opened on one side of the outer shell 1.
[0029] The firing button 12 is connected to the firing device 4 at the rear via a connecting rod 13. The firing device 4 consists of a tailstock 14 and a firing block 15. The tailstock 14 is embedded in a groove arranged at the rear of the housing 1 to form an integral part with the tail 16 of the housing 1. The front is connected to the firing block 15 via a connecting block 17. The firing block 15 is directly opposite the biopsy component 3. The firing device 4 is provided with a limit block 18.
[0030] like Figure 4-6As shown, the limiting block 18 is installed above the connecting block 17 between the tailstock 14 and the firing block 15. Its two sides protrude through the through holes 19 on both sides of the outer casing 1. Inside the outer casing 1, a protruding limiting protrusion (not shown in the figure) is provided on one side of the limiting block 18. Two grooves 21 arranged horizontally are provided on one side of the limiting protrusion. A limiting through hole 22 is provided on the limiting block 18. A limiting strip 52 that can pass through the limiting through hole 22 is provided on the tailstock 14. When the limiting protrusion engages with the left side... In the groove 21, the limiting through hole and the limiting strip 52 are separated to restrict movement. The moving limiting protrusion is inserted into the right groove 21. The limiting through hole 22 corresponds to the limiting strip 52. The moving firing button 12 is pushed forward to drive the tailstock 14 forward, so that the firing block 15 fires the biopsy component 3. The tailstock 14 is provided with a support fixing strip 23 that opens into a figure-eight shape on both sides of the connecting block 17. The support fixing strip 23 abuts against the limiting posts 20 located on both sides inside the outer shell 1 to prevent them from moving, and has a spring-back function.
[0031] The biopsy assembly 3 is installed in the inner shell 2, which consists of a needle holder 24 and an inner shell cavity 25. The needle holder 24 is installed at the front of the inner shell cavity 25 and is fixed by engaging with the front retaining groove 10. The firing needle 5 passes through the inside. The middle and rear of the inner shell cavity 25 are fixed by engaging with the middle retaining groove 100 and the rear retaining groove 110, respectively. Inside the inner shell cavity 25, from front to back, there are a top seat 27, a first limiting seat 28, and a second limiting seat 29 arranged sequentially. The top seat 27, the first limiting seat 28, and the second limiting seat 29 form two independent chambers within the inner shell cavity 25, each holding two sets of biopsy components 3. Slide rails 30 are also provided on the upper and lower sides between the top seat 27 and the second limiting seat 29. When the two sets of biopsy components are inserted into the first limiting seat 28 and the second limiting seat 29 via the slide rails 30, the two sets of biopsy components are fired by the firing block 15 at the rear, and the biopsy components 3 slide out of the limiting seats to perform firing and cutting operations.
[0032] The two biopsy components 3 are a first biopsy component 31 and a second biopsy component 32, respectively. The first biopsy component 31 is installed in the anterior chamber 33, and the second biopsy component 32 is installed in the posterior chamber 34. Figure 7As shown, the first biopsy assembly 31 consists of a first needle holder 35, an outer needle 36, and a spring (not shown in the figure). The second biopsy assembly consists of a second needle holder 37, an inner needle 38, and a spring. The springs are respectively sleeved on the first needle holder 35 and the second needle holder 37, located in two chambers. The outer needle 36 is installed in front of the first needle holder 35, and the inner needle 38 is installed in front of the second needle holder 37. The outer needle 36 is sleeved on the outside of the inner needle 38 to form a firing needle 5, and the two are arranged concentrically. The inner needle 38 is longer than the outer needle 36, and a groove 39 is formed in front of the inner needle 38 near the needle tip for hooking tissue. An inclined blade 40 is formed at the front needle tip of the outer needle 36. The springs in the first and second biopsy assemblies provide pushing and pulling forces through deformation, thereby ensuring the normal operation of the equipment.
[0033] As shown in the figure, sliders 41 are provided above and below the first needle seat 35 and the second needle seat 37, and are installed in the slide rail 30 in the inner cavity. A protruding guide block 42 is installed on the upper slider 41. The guide block 42 of the first needle seat 35 is externally connected to the first displacement button 8, and the guide block 42 of the second needle seat 37 is externally connected to the second displacement button 9. A barb 43 is provided behind the first needle seat 35 and the second needle seat 37. The barb 43 is used to engage with the first limiting seat 28 and the second limiting seat 29. A top block 44 is provided in front of the second needle seat 29. When the firing block 15 pushes the second needle seat 37 out of the second limiting seat 29, the top block 44 in front of the second needle seat 37 pushes the first needle seat 35 out, driving the outer needle 36 forward to cut the tissue in the inner needle groove 39.
[0034] A limiting hole 46 is provided between the first limiting seat 28 and the second limiting seat 29, and a figure-eight shaped guide edge 45 is provided on one side of the first needle seat 35 and the second needle seat 37 to facilitate the insertion of the barbs 43 provided behind the first needle seat 35 and the second needle seat 37.
[0035] The outer shell 1 is composed of a left outer shell 47 and a right outer shell 48, and the inner shell 2 is composed of a left outer inner shell 49 and a right inner shell 50, all of which are fixed by snap-fit connections. An anti-slip layer 51 is also provided on the outer shell 1.
[0036] The working process of this utility model is as follows:
[0037] In use, first remove the protective cover. Under medical imaging equipment, insert the outer and inner needles into the lesion. Pull back the first and second displacement buttons to engage the corresponding first and second biopsy components into their respective first and second limiting seats. Move the limiting block to align its limiting through-hole with the limiting strip. Then push the firing button forward. At this time, the firing block at the rear first strikes the second needle seat on the second biopsy component, causing the inner needle to quickly extend towards the lesion and squeeze the lesion tissue into the groove in front of the inner needle. Simultaneously, the top block in front of the second needle seat strikes the first needle seat on the first biopsy component, causing the outer needle to move forward quickly as well. When the outer needle passes through the groove, the inclined blade cuts the lesion tissue in the groove and leaves it in the groove of the inner needle, completing the entire sampling operation. Then, pull out the entire concentric biopsy needle and perform subsequent laboratory tests on the lesion tissue. The whole process is convenient, simple, and efficient.
[0038] The specific embodiments described herein 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 concentric biopsy needle for breast puncture, the biopsy needle consisting of an outer shell, an inner shell, a biopsy assembly, a firing device, characterized in that: The inner shell is installed inside the outer shell, the biopsy assembly is installed inside the inner shell, the front end of the biopsy assembly is provided with a firing needle, the front end of the firing needle is exposed to the front of the outer shell through the outer shell and the inner shell, a protective sleeve is installed on the exposed part, the rear end of the biopsy assembly is provided with a firing device, biopsy operation is performed by hitting the biopsy assembly through the firing device.
2. The concentric biopsy needle for breast puncture according to claim 1, characterized by: The front of the outer shell is provided with an L-shaped opening, the first displacement button and the second displacement button are inserted and installed in the opening, the first displacement button and the second displacement button are fixedly connected with the biopsy assembly inside the inner shell by being closely attached to the inner shell, the bottom of the outer shell is provided with a front clamping groove, a middle clamping groove and a rear clamping groove at the middle position, the front and the rear, which are used to fix the inner shell at the middle position of the outer shell, the two sides of the outer shell are provided with a certain gap between the two sides and the outer shell for placing the first displacement button and the second displacement button, and a limiting strip is installed on the opposite two side walls of the inner side of the outer shell at the lower side, which is used as a moving track of the first displacement button and the second displacement button, and a firing button is further provided on one side of the outer shell.
3. The concentric biopsy needle for breast puncture according to claim 2, characterized by: The firing button is connected to the rear firing device through a connecting rod, the firing device is composed of a tail seat and a firing block, the tail seat is embedded in the groove arranged at the rear of the outer shell to form an integral body with the tail of the outer shell, the front end is connected with the firing block through a connecting block, and the firing block is opposite to the biopsy assembly, and a limiting block is arranged on the firing device.
4. The concentric biopsy needle for breast puncture according to claim 3, characterized by: The limiting block is installed above the connecting block between the tail seat and the firing block, the two sides of the limiting block are exposed through the through holes arranged on the two sides of the outer shell, a protruding limiting protrusion is arranged on one side of the limiting block inside the outer shell, two left and right arranged grooves are arranged on the other side of the limiting block, a limiting through hole is arranged on the limiting block, and a limiting strip is arranged on the tail seat and can pass through the limiting through hole, when the limiting protrusion is clamped into the left groove, the limiting through hole and the limiting strip are separated to limit the movement, when the limiting protrusion is clamped into the right groove, the limiting through hole corresponds to the limiting strip, the forward movement of the firing button drives the tail seat to move forward, the firing block hits the biopsy assembly, and the tail seat is provided with a supporting fixed strip which is spread in a splayed eight-shaped manner on the two sides of the connecting block, the supporting fixed strip abuts against the limiting column arranged on the two sides of the inner shell, prevents the movement of the limiting column, and has a rebound function.
5. The concentric biopsy needle for breast puncture according to claim 3, characterized by: The biopsy assembly is installed in the inner shell, the inner shell is composed of a needle seat and an inner shell cavity, the needle seat is installed at the front of the inner shell cavity, the needle seat is clamped into the front clamping groove for fixation, the inner shell cavity is provided with a firing needle, the middle part and the rear of the inner shell cavity are clamped into the middle clamping groove and the rear clamping groove for fixation, the inner shell cavity is provided with a top seat, a first limiting seat and a second limiting seat from front to back, the top seat, the first limiting seat and the second limiting seat form two independent cavities in the inner shell cavity, and two sets of biopsy assemblies are respectively arranged in the two independent cavities, and slide rails are further arranged on the upper and lower sides between the top seat and the second limiting seat, when the two sets of biopsy assemblies are clamped into the first limiting seat and the second limiting seat through the slide rails, the two sets of biopsy assemblies are hit by the rear firing block, and the biopsy assemblies slide out of the limiting seat to perform the firing operation.
6. The concentric breast biopsy needle of claim 5, wherein: The two sets of biopsy assemblies are a first biopsy assembly and a second biopsy assembly, the first biopsy assembly is installed in the front chamber, and the second biopsy assembly is installed in the rear chamber, wherein the first biopsy assembly is composed of a first needle seat, an outer needle and a spring, the second biopsy assembly is composed of a second needle seat, an inner needle and a spring, the spring is sleeved on the first needle seat and the second needle seat respectively in the two chambers, the outer needle is installed in front of the first needle seat, and the inner needle is installed in front of the second needle seat, the outer needle is sleeved outside the inner needle to form a firing needle, and the two are concentrically arranged, the length of the inner needle is longer than that of the outer needle, and a groove is formed in front of the inner needle near the needle end for hooking the tissue, and a knife head is arranged in an inclined manner at the front needle end of the outer needle.
7. The concentric biopsy needle for breast puncture according to claim 6, characterized by: The upper and lower parts of the first needle seat and the second needle seat are provided with sliding blocks, which are installed in the sliding rails in the inner chamber, wherein the sliding blocks on the upper part are provided with protruding guide blocks, wherein the guide blocks of the first needle seat are connected with the first displacement button outside, the guide blocks of the second needle seat are connected with the second displacement button outside, the rear part of the first needle seat and the second needle seat is provided with a barb, which is used for clamping into the first limiting seat and the second limiting seat, the front part of the second needle seat is provided with a top block, when the firing block pushes the second needle seat out of the second limiting seat, the top block in front of the second needle seat pushes the first needle seat out and drives the outer needle to move forward to cut the tissue in the groove of the inner needle.
8. The concentric biopsy needle for breast puncture according to claim 7, characterized by: The first limiting seat and the second limiting seat are provided with a limiting hole in the middle, and an eight-shaped guide edge is formed on one side of the first needle seat and the second needle seat, which facilitates the clamping of the barb formed on the rear part of the first needle seat and the second needle seat.
9. The concentric biopsy needle for breast puncture according to claim 1, characterized by: The outer shell is composed of a left outer shell and a right outer shell, and the inner shell is composed of a left inner shell and a right inner shell, which are fixed by buckle connection.
10. The concentric biopsy needle for breast puncture according to claim 1, characterized by: The outer shell is also provided with an anti-skid layer.