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

Plasma mammary gland sampling biopsy device

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a plasma breast sampling biopsy device.

Background

Early discovery, early diagnosis and early treatment are important measures for the tertiary prevention of the breast cancer, and the vacuum-assisted minimally invasive rotary-cut operation can accurately and effectively diagnose and treat the breast diseases. The existing rotary-cut biopsy needle for vacuum-assisted minimally invasive rotary-cut surgery commonly uses an inner tube and an outer tube sampling structure, the outer tube is manually operated for puncture, focus tissues enter the outer tube through a sampling notch under the action of system negative pressure, and the inner tube rotates and advances under the control of a rotary-cut system host machine, so that physical cutting and sampling are realized, the purposes of sampling and excision can be realized, bleeding in the cutting process cannot be avoided, and risks in the surgery are increased; the problem of bleeding is to rotary-cut mammary gland biopsy art to current, has to increase the radio frequency simultaneously and melts the hemostasis function at the sample, can stanch at the postoperative, but the radio frequency ablation can let the peripheral formation ablation layer in art chamber, and the texture is harder, influences patient's aesthetic feeling effect. In addition, the inner tube and the outer tube are not easy to identify under the image, so that the cutting range is not accurate, and incomplete sampling or excessive sampling of benign tissues is caused.

Disclosure of Invention

The invention aims to provide a plasma breast sampling biopsy device to solve the technical problem that postoperative bleeding is easy to occur after sampling by a rotary-cut breast biopsy needle in the prior art.

In order to solve the technical problems, the specific technical scheme of the plasma breast sampling biopsy device is as follows:

a plasma breast sampling biopsy device comprises an outer needle tube and an inner needle tube, wherein the outer needle tube is provided with a tissue sampling groove, and the tissue sampling groove is 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.

Further, a saline tube is arranged in the inner needle tube and used for conveying saline to the electrode to provide saline environment required for plasma generation.

Furthermore, the top end of the outer needle tube is provided with a needle head, the needle head adopts a triangular needle point with the gradually reduced circular arc of the outer diameter of the outer needle tube, the included angle between the outer diameter of the outer needle tube and the tangent of the circular arc of the needle head is alpha, the alpha is 5-30 degrees, and the circular arc surface of the needle head is provided with three inclined planes.

Furthermore, the front end and the rear end of the tissue sampling groove are provided with point structures.

Further, the device includes the casing, drive arrangement includes the forward gear, nut, the double-screw bolt that cup joint in proper order on the interior needle tubing body, forward gear and nut fixed connection, double-screw bolt and nut threaded connection, the double-screw bolt top has the locating part, locating part and interior needle tubing fixed connection, the circumferential motion of limiting the double-screw bolt in the spout of casing is connected to the locating part joint, and forward gear rotates and drives the nut and rotate, drives the double-screw bolt and advances or retreat to needle tubing advances or retreats in the control.

Furthermore, the length of the stud is 40mm, and the length of the tissue sampling groove is steplessly adjustable between 0mm and 30mm under the control of a breast biopsy system.

Furthermore, the inner wall of the top end of the inner needle tube is provided with a first through hole and a second through hole, the first electrode shaft sleeve and the second electrode shaft sleeve are respectively inserted into the first through hole and the second through hole, two ends of the electrode are respectively inserted into the first electrode shaft sleeve and the second electrode shaft sleeve, the limiting part is provided with a hole site, the ejector rod is sleeved with the second spring and is inserted into the hole site, and one end of the electrode is connected with the ejector rod through a lead; the contact strip is fixedly connected in the shell, the contact strip is connected with a cable, the cable is connected with a power supply through a plug, and the ejector rod is always kept in butt joint with the contact strip under the action of the second spring in the moving process of the driving device, so that the power supply of the electrode is ensured; the outer tube electrode plate is connected to the shell through a third spring and is connected with the cable to be electrified, the outer tube electrode plate is always kept in contact with the outer wall of the outer needle tube under the action of the third spring, and the other end of the outer needle tube, serving as an electrode, and the outer needle tube and the electrode jointly act to generate plasma.

Furthermore, the double-screw bolt is provided with a through hole for the saline pipe to pass through, the saline pipe penetrates through the through hole in the double-screw bolt and enters the inner needle tube, the end part of the inner needle tube is provided with a third through hole, and the third through hole is connected with the saline pipe.

Furthermore, the tail part of the inner needle tube is connected with a tissue collecting device, the tissue collecting device is connected with a vacuum tube, the vacuum tube is connected with a vacuum device, the vacuum tube is used for generating negative pressure in the tissue collecting device and the inner needle tube, and the tissue collecting device is used for sucking and collecting cut tissues under the negative pressure.

Further, direction indicator, transmitting gear, spring one, spring holder are cup jointed in proper order to outer syringe afterbody, direction indicator, transmitting gear and outer syringe fixed connection, transmitting gear rotate to change the direction of organizing the sample cell, the last arch that has of direction indicator for instruct outer syringe direction of rotation, thereby location tissue sample cell direction, the spring cup joints on the spring holder, the spring holder is used for connecting inner needle pipe and outer syringe to the connector of shutoff inner needle pipe and outer syringe when inner needle pipe gos forward, spring one is used for springback the spring holder when inner needle pipe accomplishes the sample, opens the connector of inner needle pipe and outer syringe, makes the air admission produce pressure differential, thereby absorbs the tissue that the cutting got off.

The plasma breast sampling biopsy device has the following advantages: 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 focus tissue in the tissue sampling groove is cut, and a thin protein denaturation layer is formed, so that bleeding is effectively reduced, and the perception of mammary gland tissue is ensured. The electrode of the inner needle tube is always kept in contact with the conductor in the moving process through the design of the touch strip, the elastic push rod and the electrode slice of the elastic outer tube, so that the smoothness and the stability of an electrode circuit are kept. In addition, the design of gradually reducing the arc of the needle head increases the sharpness of the needle head, so that the puncture is sharper and the needle insertion is smoother. Meanwhile, the two ends of the tissue sampling groove are provided with the point structures, the tissue sampling groove can be clearly identified under ultrasound, a doctor can conveniently and accurately puncture and position the tissue, the edge of the lesion tissue can be effectively obtained, more benign tissues can be obtained without leakage of the lesion tissue.

Drawings

FIG. 1 is an exploded view of a plasma breast sampling biopsy device of the present invention;

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

FIG. 3 is a top plan view of the needle construction of the present invention;

FIG. 4 is a perspective view of the needle construction of the present invention;

FIG. 5 is a schematic view of a tissue sampling groove according to the present invention;

FIG. 6 is a schematic view of the inner needle cannula and electrode configuration of the present invention;

FIG. 7 is a schematic view of the open structure of the tissue sampling groove of the present invention;

the symbols in the figure illustrate: 1. a housing; 2. an outer needle tube; 21. a needle head; 22. a tissue sampling groove; 221. a dot-like structure; 23. a direction indicator; 24. a rotating gear; 25. a first spring; 26. a spring seat; 27. an outer tube electrode plate; 28. a third spring; 3. an inner needle tube; 31-1, a first through hole; 31-2, a second through hole; 32-1, a first electrode shaft sleeve; 32-2 and a second electrode shaft sleeve; 33. an electrode; 34. a top rod; 35. a second spring; 36. a touch bar; 37. a wire; 38. a cable; 39. a plug; 4. a drive device; 41. a forward gear; 42. a nut; 43. a stud; 431. A limiting member; 5. vacuumizing a tube; 6. a tissue collection device; 7. a brine pipe.

Detailed Description

For a better understanding of the objects, structure and function of the present invention, a plasma breast biopsy device will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 and 2, the plasma breast sampling biopsy device of the present invention comprises a housing 1, wherein the tail of an outer needle tube 2 is connected with the housing 1, the tube body is exposed outside the housing 1, the top end of the outer needle tube 2 is provided with a needle 21, and the needle 21 is used for puncturing the skin and inserting the outer needle tube 2 into the tissue of the human body; the outer needle tube 2 is provided with a tissue sampling groove 22 near the needle head 21, and the tissue sampling groove 22 is used for sucking lesion tissues under negative pressure; an inner needle tube 3 is arranged in the shell 1, at least part of the inner needle tube 3 is sleeved in the outer needle tube 1, a driving device 4 is arranged in the shell 1, the inner needle tube 2 is connected with the driving device 4, and the driving device 4 is used for driving the inner needle tube 2 to move forwards and backwards. The inner needle tube 2 has a cutting device at the tip, and the cutting device cuts tissue when it is advanced to the tissue sampling slot 22. The tail part of the inner needle tube 2 is connected with a tissue collecting device 6, the tissue collecting device 6 is connected with a vacuumizing tube 5, the vacuumizing tube 5 is connected with a vacuumizing device, the vacuumizing tube 5 is used for generating negative pressure in the tissue collecting device 6 and the inner needle tube 3, and the tissue collecting device 6 is used for sucking and collecting cut tissues under the negative pressure.

The tail part 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, the rotating gear 24 and the outer needle tube 2 are fixedly connected, the rotating gear 24 is controlled by the breast biopsy system to rotate, so that the direction of the tissue sampling groove 22 is changed, and a bulge is arranged on the direction indicator 23 and used for indicating the rotating direction of the outer needle tube 2, so that the direction of the tissue sampling groove 22 is positioned. 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 blocking a connecting port of the inner needle tube 3 and the outer needle tube 2 when the inner needle tube 3 advances, the first spring 25 is used for rebounding the spring seat 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, so that air enters to generate pressure difference, and cut tissues are sucked. As shown in figures 3 and 4, the needle head 21 adopts a triangular needle point which is gradually reduced by the circular arc of the outer diameter size of the outer needle tube 2, the included angle between the outer diameter of the outer needle tube 2 and the circular arc tangent of the needle head 21 is alpha, the alpha is 5-30 degrees, the circular arc surface of the needle head 21 is provided with three inclined cut surfaces a, b and c, the acuteness of the needle head is increased by the edge angle of the inclined cut surfaces, the puncture is sharper, and the needle insertion is smoother. As shown in fig. 5, the front end and the rear end of the tissue sampling groove 22 are provided with the point-like structures 221, the point-like structures 221 can enhance the developing effect, when the outer needle tube 2 is punctured to a focus, the tissue sampling groove 22 can be clearly identified under ultrasound, so that a doctor can conveniently and accurately puncture and position, the edge of a lesion tissue can be effectively obtained, no more benign tissue is obtained, and no lesion tissue is obtained.

The tail of the inner needle tube 3 is sleeved with the tissue collecting device 6, the driving device 4 comprises a forward gear 41, a nut 42 and a stud 43 which are sequentially sleeved on the tube body of the 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, the top end of the stud 43 is provided with a limiting part 431, 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 shell 1 to limit the circumferential movement of the stud 43, the breast biopsy system controls the forward gear 41 to rotate to drive the nut 42 to rotate, and drives the stud 43 to move forward or backward, so that the inner needle tube 3 is controlled to move forward or backward. The length of the stud 43 is 40mm, the length of the tissue sampling groove 22 under the control of a breast biopsy system is steplessly adjustable between 0mm and 30mm, and the sampling device can be used for sampling focuses of different sizes.

As shown in figure 6, 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 cutting device comprises a first electrode shaft sleeve 32-1, a second electrode shaft sleeve 32-2 and an electrode 33, 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, and 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 has a hole, the second spring 35 is sleeved on the top rod 34 and inserted into the hole, and one end of the electrode 33 is connected to the top rod 34 through a lead 37. Contact strip 36 is fixedly connected in the shell, contact strip 36 is connected with cable 38, the cable is connected with a power supply through plug 39, and ejector rod 34 is always kept in butt joint with contact strip 36 under the action of spring II 35 in the moving process along with driving device 4, so that power supply of electrode 33 is ensured. The outer tube electrode plate 27 is connected to the shell 1 through the spring III 28, the outer tube electrode plate 27 is connected with the cable 38 and electrified, 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 spring III 28, and the other end of the outer needle tube 2 serving as an electrode and the electrode 33 act together to generate plasma. The stud 43 is provided with 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 is provided with a third through hole 71, the third through hole 71 is connected with the saline pipe 7, and the saline pipe 7 is used for conveying saline to the electrode 33 and providing a saline environment required by plasma generation.

When the plasma mammary gland sampling biopsy device is used, the plasma mammary gland sampling biopsy device is connected with a mammary gland biopsy system for device identification detection, the mammary gland biopsy system controls the forward gear 41 to rotate forwards, the driving nut 42 rotates forwards, the stud 43 drives the inner needle tube 3 to advance to the top end of the outer needle tube 2, the tissue sampling groove 22 is sealed, and initialization is completed.

During puncture, the outer needle tube 2 is punctured below a focus, the opening of the tissue sampling groove 22 faces upwards, the breast biopsy system is operated, the forward gear 41 is controlled to rotate reversely, the driving nut 42 rotates reversely, the stud 43 drives the inner needle tube 3 to move backwards, as shown in fig. 7, the tissue sampling groove 22 is opened to an appropriate opening size (the width of the tissue sampling groove is L, the width of the opening is L1), the breast biopsy system controls the operation of the vacuum pumping device, the vacuum pumping tube 5 provides negative pressure to suck the focus tissue into the tissue sampling groove 22, the breast biopsy system controls the cable 38 to be electrified, the saline tube 7 is controlled to convey saline to the top end of the inner needle tube, the electrode 33 and the outer needle tube 2 are electrified under a saline environment to generate plasma to cut the focus tissue, the breast biopsy system controls the forward gear 41 to rotate forwards in a cutting process, the driving nut 42 rotates forwards, the stud 43 drives the inner needle tube 3 to move forwards until the tissue sampling groove 22 is closed, and the focus tissue cutting in an opening area is completed. The cut tissue is sucked and collected in the tissue collecting device 6 by negative pressure, and sampling is completed. Then the rotating gear 24 is rotated to change the direction of the tissue sampling groove 22, and the steps are repeated to carry out rotary cutting sampling at different angles.

The plasma electrode is adopted to cut the focus tissue, and a thin protein denaturation layer is formed on a cutting surface, so that bleeding is effectively reduced, the sampling of the fibrosis tissue can be effectively responded, the bleeding is prevented, and the perception of the mammary tissue is ensured.

It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

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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