CN115500872A - Plasma mammary gland sampling biopsy device - Google Patents

Abstract

The invention belongs to the technical field of medical instruments, and discloses a plasma breast sampling biopsy device which comprises an outer needle tube and an inner needle tube, wherein a tissue sampling groove is formed in the outer needle tube and used for sucking focus tissues under negative pressure; the inner needle tube is at least partially sleeved in the outer needle tube and is connected with a driving device, the driving device is used for driving the inner needle tube to move forwards and backwards, the top end of the inner needle tube is provided with an electrode, and the electrode and the outer needle tube are electrified to form plasma for cutting focus tissues in the tissue sampling groove. According to the invention, the electrode is arranged at the end part of the inner needle tube, the saline is conveyed to the electrode generation part through the saline tube, the electrode and the outer needle tube form plasma after being electrified, the focal tissue in the tissue sampling groove is cut off, and a thin protein denaturation layer is formed, so that the bleeding is effectively reduced, and the perception of the mammary tissue is ensured.

Description

A plasma breast sampling biopsy device

technical field

The invention belongs to the technical field of medical instruments, in particular to a plasma breast sampling biopsy device.

Background technique

Early detection, early diagnosis, and early treatment are important measures for the tertiary prevention of breast cancer. Vacuum-assisted minimally invasive rotary excision surgery can accurately and effectively diagnose and treat breast diseases. The existing vacuum-assisted minimally invasive rotary mammary gland biopsy needle commonly used in rotary excision surgery adopts the structure of inner and outer tubes for sampling, and manually operates the outer tube to puncture. The inner tube rotates and advances under the control of the host of the rotary mammary gland excision system to achieve physical cutting and sampling, which can achieve the purpose of sampling and resection, but bleeding during the excision process cannot be avoided, which increases intraoperative risks; existing methods for breast rotary excision biopsy For bleeding problems, if the hemostatic function of radiofrequency ablation is added at the same time as sampling, hemostasis can be performed after surgery, but radiofrequency ablation will form an ablation layer around the surgical cavity, which is relatively hard and affects the aesthetic effect of patients. In addition, the inner and outer tubes are not easy to identify under the image, resulting in inaccurate cutting range, resulting in incomplete or excessive sampling of benign tissues.

Contents of the invention

The purpose of the present invention is to provide a plasma mammary gland sampling biopsy device to solve the technical problem that the existing mammary gland rotary biopsy needle is prone to postoperative bleeding after sampling.

In order to solve the above-mentioned technical problems, the specific technical scheme of a kind of plasma mammary gland sampling biopsy device of the present invention is as follows:

A plasma breast sampling biopsy device, comprising an outer needle tube and an inner needle tube, the outer needle tube has a tissue sampling groove, and the tissue sampling groove is used to absorb lesion tissue under negative pressure; the inner needle tube is at least partially sleeved on the outer needle tube Inside the needle tube, the inner needle tube is connected to a driving device, the driving device is used to drive the inner needle tube to move forward and backward, the top of the inner needle tube has an electrode, and the electrode is energized with the outer needle tube to form a plasma cutting lesion in the tissue sampling tank organize.

Further, there is a saline tube inside the inner needle tube, and the saline tube is used to transport the saline to the electrodes to provide the saline environment required for plasma generation.

Further, the top of the outer needle tube has a needle head, and the needle head adopts a triangular needle tip gradually reduced by the outer diameter of the outer needle tube, and the angle between the outer diameter of the outer needle tube and the tangent line of the needle arc is α, and α is 5 °-30°, the arc surface of the needle has three oblique cut surfaces.

Further, the front and rear ends of the tissue sampling groove have point structures.

Further, the device includes a housing, and the driving device includes a forward gear, a nut, and a stud that are sequentially socketed on the inner needle tube body, the forward gear is fixedly connected to the nut, and the stud is threadedly connected to the nut. The top of the stud has a limiter, the limiter is fixedly connected with the inner needle tube, the limiter is clamped in the chute of the housing to limit the circumferential movement of the stud, the rotation of the forward gear drives the rotation of the nut, Drive the stud to advance or retreat, thereby controlling the inner needle tube to advance or retreat.

Further, the length of the stud is 40mm, and the length of the tissue sampling groove is infinitely adjustable between 0-30mm under the control of the breast biopsy system.

Further, the inner wall at the top of the inner needle tube has a through hole 1 and a through hole 2, the electrode bushing 1 and the electrode bushing 2 are inserted into the through hole 1 and the through hole 2 respectively, and the two ends of the electrodes are inserted into the electrode bushing 1 and the electrode bushing respectively. Axle sleeve 2, the limiting member has a hole, the ejector rod is sleeved with the spring 2 and inserted into the hole, one end of the electrode is connected to the ejector rod through a wire; a contact strip is fixedly connected in the housing, and the contact strip It is connected with the cable, the cable is connected to the power supply through the plug, and the ejector rod is always kept in contact with the contact bar under the action of the second spring during the movement of the driving device to ensure the power supply of the electrode; the electrode sheet of the outer tube passes through the spring three Connected to the shell, the electrode piece of the outer tube is connected to the cable for electricity, and the electrode piece of the outer tube is always kept in contact with the outer wall of the outer needle tube under the action of the spring three, and the other end of the outer needle tube as the electrode is connected to the electrode Together they create plasma.

Further, the stud has a through hole for the saline pipe to pass through, and the saline pipe enters the inner needle through the through hole on the stud, and the end of the inner needle has a through hole three, and the through hole three is connected Saline pipe.

Further, the tail of the inner needle tube is connected to a tissue collection device, the tissue collection device is connected to a vacuum tube, and the vacuum tube is connected to a vacuum device, and the vacuum tube is used to generate negative pressure in the tissue collection device and the inner needle tube, and the tissue The collection device is used to suck and collect the cut tissue under negative pressure.

Further, the tail of the outer needle tube is sequentially socketed with a direction indicator, a rotating gear, spring one, and a spring seat. The direction indicator, the rotating gear and the outer needle tube are fixedly connected, and the rotating gear rotates, thereby changing the direction of the tissue sampling groove. There is a protrusion on the direction indicator, which is used to indicate the rotation direction of the outer needle tube, so as to locate the direction of the tissue sampling groove. The spring sleeve is set on the spring seat, and the spring seat is used to connect the inner needle tube and the outer needle tube, and When the inner needle tube advances, the connection port between the inner needle tube and the outer needle tube is blocked, and the spring one is used to rebound the spring seat when the inner needle tube finishes sampling, and the connection port between the inner needle tube and the outer needle tube is opened, so that air enters to generate a pressure difference , so as to absorb the cut tissue.

A plasma mammary gland sampling biopsy device of the present invention has the following advantages: the present invention is provided with an electrode at the end of the inner needle tube, and the physiological saline is delivered to the place where the electrode occurs through the saline tube, and plasma is formed after the electrode and the outer needle tube are energized, and the tissue The lesion tissue in the sampling tank is excised and a thin denatured layer of protein is formed, which effectively reduces bleeding and ensures the sensory perception of breast tissue. In the present invention, the electrodes of the inner needle tube are always kept in contact with the conductor through the design of the contact strip, the elastic ejector rod, and the electrode sheet of the elastic outer tube, and the electrode circuit is kept smooth and stable. In addition, the gradually decreasing design of the arc of the needle head of the present invention increases the sharpness of the needle head, making the puncture sharper and the needle insertion smoother. At the same time, the present invention sets point-shaped structures at both ends of the tissue sampling groove, and the tissue sampling groove can be clearly identified under ultrasound, which is convenient for doctors to accurately puncture and locate, and can effectively obtain the edge of diseased tissue without taking too much benign tissue or missing the lesion organize.

Description of drawings

Fig. 1 is the explosion diagram of the plasma mammary gland sampling biopsy device of the present invention;

Fig. 2 is a front sectional view of the plasma breast sampling biopsy device of the present invention;

Fig. 3 is a top view of the needle structure of the present invention;

Fig. 4 is a three-dimensional view of the needle structure of the present invention;

Fig. 5 is the structural representation of the tissue sampling tank of the present invention;

Fig. 6 is a schematic diagram of the inner needle tube and electrode structure of the present invention;

7 is a schematic diagram of the opening structure of the tissue sampling slot of the present invention;

Explanation of marks in the figure: 1. Shell; 2. Outer needle tube; 21. Needle; 22. Tissue sampling slot; 221. Point structure; 23. Direction indicator; 24. Rotating gear; 25. Spring one; 26. Spring Seat; 27, outer tube electrode sheet; 28, spring three; 3, inner needle tube; 31-1, through hole one; 31-2, through hole two; 32-1, electrode shaft sleeve one; 32-2, electrode shaft Cover two; 33, electrode; 34, ejector rod; 35, spring two; 36, contact bar; 37, wire; 38, cable; 39, plug; 4, driving device; 41, forward gear; 42, nut; 43 , stud; 431, limit piece; 5, vacuum tube; 6, tissue collection device; 7, saline tube.

detailed description

In order to better understand the purpose, structure and function of the present invention, a plasma breast sampling biopsy device of the present invention will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figures 1 and 2, a plasma breast sampling biopsy device of the present invention includes a housing 1, the tail of the outer needle tube 2 is connected to the housing 1, the tube body is exposed outside the housing 1, and the top of the outer needle tube 2 has a needle 21 , the needle 21 is used to pierce the skin and insert the outer needle tube 2 into human tissue; the outer needle tube 2 has a tissue sampling groove 22 near the needle head 21, and the tissue sampling groove 22 is used to absorb the lesion tissue under negative pressure; the housing 1 has an inner needle tube 3. The inner needle tube 3 is at least partly sleeved in the outer needle tube 1. The housing 1 has a driving device 4, the inner needle tube 2 is connected to the driving device 4, and the driving device 4 is used to drive the inner needle tube 2 forward and backward. The top end of the inner needle tube 2 has a cutting device, which cuts the tissue when it advances to the tissue sampling slot 22 . The tail of the inner needle tube 2 is connected to the tissue collection device 6, and the tissue collection device 6 is connected to the vacuum tube 5, and the vacuum tube 5 is connected to the vacuum device, and the vacuum tube 5 is used to generate negative pressure in the tissue collection device 6 and the inner needle tube 3, and the tissue collection device 6 Used to aspirate and collect cut tissue under negative pressure.

The tail of the outer needle tube 2 is sequentially socketed with a direction indicator 23, a rotating gear 24, a spring one 25, and a spring seat 26. The direction indicator 23 and the rotating gear 24 are fixedly connected with the outer needle tube 2. The mammary gland biopsy system controls the rotation of the rotating gear 24, thereby changing The direction of the tissue sampling groove 22 has a protrusion on the direction indicator 23, which is used to indicate the rotation direction of the outer needle tube 2, so as to locate the direction of the tissue sampling groove 22. The spring one 25 is sleeved on the spring seat 26, the spring seat 26 is used to connect the inner needle tube 3 and the outer needle tube 2, and blocks the connecting port of the inner needle tube 3 and the outer needle tube 2 when the inner needle tube 3 advances, and the spring one 25 is used When the inner needle tube 3 finishes sampling, the spring seat 26 is rebounded, and the connection port between the inner needle tube 3 and the outer needle tube 2 is opened, so that air enters to generate a pressure difference, thereby absorbing the cut tissue. As shown in Figures 3 and 4, the needle head 21 adopts a triangular needle tip that is gradually reduced by the outer diameter of the outer needle tube 2. °, the arc surface of the needle head 21 has three beveled surfaces a, b, and c. The edges and corners of the beveled surfaces increase the sharpness of the needle, making the puncture sharper and the needle insertion smoother. As shown in Fig. 5, the front and rear ends of the tissue sampling groove 22 have point structures 221, which can enhance the imaging effect. When the outer needle tube 2 punctures the lesion, the tissue sampling groove 22 can be clearly identified under ultrasound, which is convenient for doctors to accurately The puncture positioning can effectively get the edge of the diseased tissue, and do not take too much benign tissue, and do not miss the diseased tissue.

The tail of the inner needle tube 3 is socketed with the tissue collection device 6, and the driving device 4 includes a forward gear 41, a nut 42, and a stud 43 which are sequentially socketed on the body of the inner needle tube 3. The forward gear 41 is fixedly connected with the nut 42, and the stud 43 is connected with the The nut 42 is threaded, the top of the stud 43 has a stopper 431, the stopper 431 is fixedly connected with the inner needle tube 3, the stopper 431 is clipped in the chute of the housing 1 to limit the circumferential movement of the stud 43, and the mammary gland The biopsy system controls the forward gear 41 to rotate to drive the nut 42 to rotate, and drives the stud 43 to advance or retreat, thereby controlling the inner needle tube 3 to advance or retreat. The length of the stud 43 is 40mm, and the length of the tissue sampling groove 22 is infinitely adjustable between 0-30mm under the control of the breast biopsy system, which can handle the sampling of lesions of different sizes.

As shown in Figure 6, the inner wall at the top of the inner needle tube 3 has a through hole 31-1 and a through hole 2 31-2. Sleeve 1 32-1, electrode sleeve 2 32-2 are respectively inserted into through hole 1 31-1 and through hole 2 31-2, and both ends of electrode 33 are respectively inserted into electrode sleeve 1 32-1 and electrode sleeve 2 32-2 . There is a hole on the limiter 331 , the push rod 34 is sleeved with the spring 2 35 and inserted into the hole, and one end of the electrode 33 is connected to the push rod 34 through a wire 37 . The housing is fixedly connected with a contact strip 36, the contact strip 36 is connected to the cable 38, the cable is connected to the power supply through the plug 39, and the push rod 34 is always kept against the contact strip 36 under the action of the spring 2 35 during the movement of the driving device 4. connected to ensure the power supply of the electrode 33. The outer tube electrode piece 27 is connected to the housing 1 through the spring three 28, the outer tube electrode piece 27 is connected to the cable 38 for electricity, the outer tube electrode piece 27 is always kept in contact with the outer wall of the outer needle tube 2 under the action of the spring three 28, The other end of the outer needle tube 2 as an electrode works together with the electrode 33 to generate plasma. The stud 43 has a through hole for the saline pipe 7 to pass through. The saline pipe 7 passes through the through hole on the stud 43 and enters the inner needle tube 3. The end of the inner needle tube 3 has a through hole 3 71, and the through hole 3 71 is connected to the saline pipe 7. , the saline pipe 7 is used to transport the saline to the electrode 33 to provide the saline environment required for plasma generation.

When in use, the plasma breast sampling biopsy device of the present invention is connected with the breast biopsy system for device identification and detection. The breast biopsy system controls the forward gear 41 to rotate forward, the drive nut 42 to rotate forward, and the stud 43 drives the inner needle tube 3 to advance to the outer needle tube. 2. At the top, the area of the tissue sampling tank 22 is closed, and the initialization is completed.

When puncturing, the outer needle tube 2 is punctured below the lesion, the opening of the tissue sampling groove 22 faces upward, the breast biopsy system is operated, the forward gear 41 is controlled to reverse, the drive nut 42 is reversed, and the stud 43 drives the inner needle tube 3 to retreat, as shown in Figure 7 As shown, open the tissue sampling tank 22 to an appropriate opening size (the width of the tissue sampling tank is L, and the opening width is L1), and at the same time, the breast biopsy system controls the operation of the vacuum device, and the vacuum tube 5 provides negative pressure to suck the lesion tissue into the tissue for sampling In the tank 22, the breast biopsy system controls the cable 38 to energize, and at the same time controls the saline tube 7 to deliver saline to the top of the inner needle tube. The electrode 33 and the outer needle tube 2 are energized in a saline environment to generate plasma to cut the lesion tissue. During the cutting process, breast biopsy The system controls the forward gear 41 to rotate forward, the drive nut 42 to rotate forward, and the stud 43 drives the inner needle tube 3 to advance until the area of the tissue sampling groove 22 is closed, and the lesion tissue cutting in the opening area is completed. The cut tissue is collected in the tissue collection device 6 by negative pressure suction, and the sampling is completed. Then rotate the rotating gear 24 to change the direction of the tissue sampling groove 22 and then repeat the above steps to perform rotary cutting and sampling at different angles.

The invention adopts the plasma electrode to cut the lesion tissue, and forms a thin denatured protein layer on the cutting surface, which effectively reduces bleeding, can effectively cope with the sampling of fibrotic tissue, prevents bleeding, and ensures the sensory perception of breast tissue at the same time.

It can be understood that the present invention is described through some embodiments, and those skilled in the art know that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, the features and examples may be modified to adapt a particular situation and material to the teachings of the invention without departing from the spirit and scope of the invention. Therefore, the present invention is not limited by the specific embodiments disclosed here, and all embodiments falling within the scope of the claims of the present application belong to the protection scope of the present invention.

Claims (10)

1. A plasma mammary gland sampling biopsy device comprises an outer needle tube (2) and an inner needle tube (3), wherein a tissue sampling groove (22) is formed in the outer needle tube (2), and the tissue sampling groove (22) is used for sucking lesion tissues under negative pressure; the utility model discloses a plasma cutting tissue sampling groove 22, including inner needle tube (3), inner needle tube (3) at least part cup joints in outer needle tube (1), inner needle tube (2) are connected with drive arrangement (4), drive arrangement (4) are used for driving advancing of inner needle tube (2) and retreat, its characterized in that, inner needle tube (3) top has electrode (33), electrode (33) and outer needle tube (2) circular telegram form the focus tissue in plasma cutting tissue sampling groove 22.

2. The plasma breast sampling biopsy device according to claim 1, characterized in that the inner needle tube (3) has a saline tube (7) therein, and the saline tube (7) is used for conveying saline to the electrode (33) to provide saline environment required for plasma generation.

3. The plasma breast sampling biopsy device according to claim 1, wherein a needle head (21) is arranged at the top end of the outer needle tube (2), the needle head (21) adopts a triangular needle tip with a gradually reduced circular arc of the outer diameter size of the outer needle tube (2), the outer diameter of the outer needle tube (2) and the tangent line of the circular arc of the needle head (21) form an included angle α, α is 5-30 °, and the circular arc of the needle head (21) has three oblique planes.

4. The plasma breast sampling biopsy device according to claim 1, characterized in that the front and rear ends of the tissue sampling groove (22) have a point-like structure (221).

5. The plasma breast sampling biopsy device according to claim 1, wherein the device comprises a housing (1), the driving device (4) comprises a forward gear (41), a nut (42) and a stud (43) which are sequentially sleeved on a tube body of an inner needle tube (3), the forward gear (41) is fixedly connected with the nut (42), the stud (43) is in threaded connection with the nut (42), a limiting part (431) is arranged at the top end of the stud (43), the limiting part (431) is fixedly connected with the inner needle tube (3), the limiting part (431) is clamped in a sliding groove of the housing (1) to limit circumferential movement of the stud (43), and the forward gear (41) rotates to drive the nut (42) to rotate to drive the stud (43) to move forward or backward, so that the inner needle tube (3) is controlled to move forward or backward.

6. The plasma breast sampling biopsy device according to claim 5, wherein the stud (43) has a length of 40mm, and the length of the tissue sampling slot (22) is steplessly adjustable between 0-30mm under the control of the breast biopsy system.

7. The plasma breast sampling biopsy device according to claim 5, wherein the inner wall of the top end of the inner needle tube (3) is provided with a first through hole (31-1) and a second through hole (31-2), the first electrode shaft sleeve (32-1) and the second electrode shaft sleeve (32-2) are respectively inserted into the first through hole (31-1) and the second through hole (31-2), the two ends of the electrode (33) are respectively inserted into the first electrode shaft sleeve (32-1) and the second electrode shaft sleeve (32-2), the limiting member (331) is provided with a hole site, the second spring (35) is sleeved on the ejector rod (34) and is inserted into the hole site, and one end of the electrode (33) is connected with the ejector rod (34) through a lead (37); a contact bar (36) is fixedly connected in the shell (1), the contact bar (36) is connected with a cable (38), the cable (38) is connected with a power supply through a plug (39), and the ejector rod (34) is always kept in butt joint with the contact bar (36) under the action of a second spring (35) in the moving process along with the driving device (4), so that the power supply of the electrode (33) is ensured; the outer tube electrode plate (27) is connected to the shell (1) through a third spring (28), the outer tube electrode plate (27) is connected with the cable (38) and powered on, the outer tube electrode plate (27) is always kept in contact with the outer wall of the outer needle tube (2) under the action of the third spring (28), and the other end of the outer needle tube (2) serving as an electrode and the electrode (33) jointly act to generate plasma.

8. The plasma breast sampling biopsy device according to claim 5, characterized in that the stud (43) is provided with a through hole for passing a saline pipe (7), the saline pipe (7) passes through the through hole on the stud (43) and enters the inner needle tube (3), the end of the inner needle tube (3) is provided with a through hole III (71), and the through hole III (71) is connected with the saline pipe (7).

9. The plasma breast sampling biopsy device according to claim 5, characterized in that the inner needle tube (2) is connected with a tissue collection device (6) at the tail part, the tissue collection device (6) is connected with an evacuation tube (5), the evacuation tube (5) is connected with an evacuation device, the evacuation tube (5) is used for generating negative pressure in the tissue collection device (6) and the inner needle tube (3), and the tissue collection device (6) is used for sucking and collecting cut tissue under the negative pressure.

10. The plasma breast sampling biopsy device according to claim 5, wherein the tail of the outer needle tube (2) is sequentially sleeved with a direction indicator (23), a rotating gear (24), a first spring (25) and a spring seat (26), the direction indicator (23) and the rotating gear (24) are fixedly connected with the outer needle tube (2), the rotating gear (24) rotates to change the direction of the tissue sampling groove (22), the direction indicator (23) is provided with a protrusion for indicating the rotating direction of the outer needle tube (2) to position the direction of the tissue sampling groove (22), the first spring (25) is sleeved on the spring seat (26), the spring seat (26) is used for connecting the inner needle tube (3) and the outer needle tube (2) and sealing a connecting port of the inner needle tube (3) and the outer needle tube (2) when the inner needle tube (3) advances, and the first spring (25) is used for rebounding (26) when the inner needle tube (3) finishes sampling, and opening the connecting port of the inner needle tube (3) and the outer needle tube (2) to enable air to enter a needle tube connecting port to cut tissue to be sucked.

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