KR102215655B1 - Core biopsy device - Google Patents

Abstract

The present invention relates to a cutting biopsy device capable of improving collection efficiency, by newly presenting a movement relationship between the inner needle and the outer needle when firing, further improving the accuracy of tissue collection, and further increasing the safety during collection, It relates to an amputated biopsy device that can simplify the recovery of the collected tissue.

Description

Cutting biopsy device {Core biopsy device}

Embodiments of the present invention relate to a cutting biopsy device.

In general, for the examination of biological tissues, a method of injecting a device capable of sampling a biological tissue into the biological tissue and collecting a tissue to be sampled is used. These types include aspiration biopsies and amputation biopsies.

Recently, cutting biopsies that can be obtained in a state in which the histological shape is maintained intact by cutting the tissue by the shape of a needle and improve the accuracy of diagnosis have been widely used. In the case of amputation biopsy, it is widely used compared to recent aspiration biopsy because it minimizes the diameter of the needle inserted into the affected area, minimizes repetitive invasive behavior, and enables precise procedures on small specimens.

In the cutting biopsy type specimen device described in Korean Patent Registration Nos. 10-1463867 and 10-1551311, the inner needle is first fired and the outer needle is fired in the cutting mechanism, so that the inner needle of very thin thickness is advancing. It has been pointed out that the procedure is very difficult because it may not penetrate or bend the calcified tissue, and thus the nodule may be pushed backward or the inner needle may not reach the exact region of the tissue to be collected. In addition, since such a specimen device has a complex structure and a large number of constituent parts, there is a limit to lower productivity.

The present invention is to overcome the problems and/or limitations of the prior art described above, by newly presenting the movement relationship between the inner needle and the outer needle when firing, further improving the accuracy of tissue collection, and further increasing the safety during collection. One purpose is to provide an amputated biopsy instrument.

In addition, another object is to provide a cutting biopsy device capable of further lowering the production cost by significantly reducing the number of component parts.

In order to achieve the above object, the cutting biopsy device according to an embodiment of the present invention has a housing extending in an axial direction and including a needle hole at one end, a tissue collecting groove for collecting tissue at one end, and the other end The fixed inner needle and the outer needle provided in the shape of a pipe to accommodate the inner needle and provided to be slidable along the inner needle, a set of needles protruding to the outside of the housing through the needle hole, and one end of the outer needle And a master block located in the housing so as to be movable in the axial direction, a first space located in the master block and in communication with the tissue collecting groove, and located in the housing so as to be movable in the axial direction A hub block, a spring coupled to the hub block and the master block, a first support unit selectively coupled to the master block at least at a loading position, and a second support unit selectively coupled to the hub block at least at a loading position And, it may include a loading unit for moving the hub block to the loading position, and a launch unit provided to selectively release the combination of at least the first support unit and the master block.

Further comprising a pneumatic control unit interposed between the needle hole and the master block, the pneumatic control unit is located in the housing, interposed between the needle hole and the master block, and communicates with the first space It may include a control block having at least one through hole.

The pneumatic pressure control unit may further include at least one film assembly interposed between at least one of between the control block and the needle hole and between the control block and the master block and provided to allow flow of air.

The loading unit may include a first handle positioned outside the housing, and a second handle extending from the first handle toward the hub block.

Further comprising a recovery unit provided to recover the tissue collected in the tissue collection groove, the recovery unit is coupled to the inner needle, a third handle located outside the housing, and extending from the third handle, It may include a support provided to selectively support the outside of the housing.

The fast needle is in communication with the tissue collecting groove and the first space and includes a communication path formed along a longitudinal direction, and the communication path communicates with the first space in a state in which the master block has moved and in a state not moved. And, in a state in which the master block has not moved, it can be formed to a length that does not pass the master block.

Other aspects, features, and advantages other than those described above will become apparent from the following drawings, claims, and detailed description of the invention.

According to each embodiment of the present invention described above, since the user has a reciprocating motion system in which the inner needle and the outer needle enter the body together in the loaded state, and the outer needle retreats from the inner needle and then advances, the forward firing of the inner needle Due to the problem of not being able to penetrate or bend the dense film tissue or hard calcified tissue, etc., the nodule may be pushed backward or the fast needle may not reach the exact target tissue area, making the procedure very difficult. Can be solved.

By forming a negative pressure in the first groove and the first space of the master block during firing, a simple negative pressure forming structure can be formed, and accordingly, the efficiency of tissue collection can be further improved. The sound pressure effect can be further improved by the structure of the master block, the structure of the pneumatic control unit, and/or the length of the communication path.

According to the improvement of the structure of the needle set, it is possible to prevent damage to the tissue when inserted into the tissue, and to ensure that the tissue is collected stably.

It is possible to further facilitate the manufacture of fast needles capable of forming negative pressure.

On the other hand, in particular, since the configuration of the cutting biopsy device can be formed in a thin cylindrical shape by aligning the master block, spring, and hub block in-line, it is easy for the user to grasp it. have.

On the other hand, it is possible to recover the tissue existing in the first groove by moving the fast needle with a simple operation after the tissue is collected, so there is an effect that a simple specimen collection is possible.

On the other hand, the length of the master block in the traveling direction is lengthened, and by making it move closely within the housing, there is an effect of enabling a precise treatment by performing a stable sliding operation.

According to the cutting biopsy device according to the embodiments of the present invention, a procedure can be performed by minimizing the change of the grip shape with only one hand holding the cutting biopsy device.

Further, according to the present invention, by newly presenting the movement relationship between the inner needle and the outer needle when firing, the accuracy of tissue collection can be further improved, and the safety at the time of collection can be further improved.

Since the number of components can be drastically reduced, production costs can be further lowered.

1 is a view showing a cutting biopsy device according to an embodiment.
2 is a side cross-sectional view of the cut biopsy device of FIG. 1 in one direction.
3 is a side cross-sectional view of the cut biopsy device of FIG. 1 in another direction.
4A is a view for explaining the structure of a needle set according to an embodiment.
4B is a partial cross-sectional view of an inner needle according to an embodiment.
Figure 4c is a partial cross-sectional view of the inner needle according to another embodiment.
Figure 4d is a perspective view of a quick needle according to another embodiment.
Figure 4e is a cross-sectional view of the fast needle shown in Figure 4d.
Figure 4f is a partial side view showing another embodiment of the outer needle and the inner needle.
5 is a partial cross-sectional view showing an embodiment of a loading unit and a recovery unit.
6 is a view showing an arrangement state of a spring, a master block, and a hub block according to one embodiment.
7 is a cross-sectional view showing a coupled state of a spring and a hub block according to an embodiment.
8 is a partial cross-sectional view showing an embodiment of a master block and a pneumatic control unit.
9 is a partial cross-sectional view showing an embodiment of a pneumatic pressure control unit.
10 is a cross-sectional view showing a state in which a master block and a hub block are moved in a second direction.

In the following, various embodiments and/or aspects are now disclosed with reference to the drawings. In the following description, for purposes of explanation, a number of specific details are disclosed to aid in an overall understanding of one or more aspects. However, it will also be appreciated by those of ordinary skill in the art that this aspect(s) may be practiced without these specific details. The following description and the annexed drawings set forth in detail certain illustrative aspects of one or more aspects. However, these aspects are exemplary and some of the various methods in the principles of the various aspects may be used, and the descriptions described are intended to include all such aspects and their equivalents.

Further, various aspects and features will be presented by a system that may include multiple devices, components and/or modules, and the like. It is also noted that various systems may include additional devices, components and/or modules, and/or may not include all of the devices, components, modules, etc. discussed in connection with the figures. It must be understood and recognized.

As used herein, “an embodiment,” “example,” “aspect,” “example,” and the like may not be construed as having any aspect or design described as being better or advantageous than other aspects or designs. . In addition, the terms "comprising" and/or "comprising" mean that the corresponding feature and/or element is present, but excludes the presence or addition of one or more other features, elements, and/or groups thereof. It should be understood as not.

In addition, terms including ordinal numbers such as first and second may be used to describe various elements, but the elements are not limited by the terms. These terms are used only for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. The term and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

In addition, in the embodiments of the present invention, unless otherwise defined, all terms used herein including technical or scientific terms are commonly understood by those of ordinary skill in the art to which the present invention belongs. It has the same meaning as. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the embodiments of the present invention, an ideal or excessively formal meaning Is not interpreted as.

Meanwhile, in the following description, some of the components are omitted or excessively enlarged or reduced in order to describe the functions of each component of the present invention, but the corresponding figures are the technical features and rights of the present invention. It will be understood that it is not intended to limit the scope.

In addition, in the following description, a plurality of drawings will be simultaneously referred to and described in order to describe one technical feature or constituent elements constituting the invention.

1 is a side view of a cutting biopsy device according to an exemplary embodiment, and FIGS. 2 and 3 are cross-sectional views of FIG. 1, respectively, and are side cross-sectional views taken in different directions.

1 to 3, the cutting biopsy device according to an embodiment includes a housing (1), a needle set (2), a master block (3), a hub block (4), a spring (5), and a first support. A unit 111, a second support unit 15, a loading unit 7 and a launch unit 14 may be included.

The housing 1 is formed to extend in the axial direction D, and may be provided so as to form a hollow portion extending in the axial direction D therein. The housing 1 may include a first housing 11, a second housing 12, and a third housing 13 coupled to each other, wherein both ends of the first housing 11 are opened and the axial direction The second housing 12 and the third housing 13 may be generally formed extending to (D), and the second housing 12 and the third housing 13 may be coupled to one end and the other end of the first housing 11, respectively. By combining the first housing 11, the second housing 12, and the third housing 13, the housing 1 may have a cylindrical shape with both ends closed. In the present specification, examples have shown that the housing 1 is formed by combining the first housing 11, the second housing 12, and the third housing 13, but the housing 1 is necessarily limited thereto. The first housing 11, the second housing 12, and the third housing 13 may be integrally formed.

A needle hole 122 is formed at an end portion of the second housing 12 in the first direction (D1), and a needle set 2 mounted inside the housing 1 passes through the needle hole 122 to the outside of the housing 1 Can be exposed to. In addition, the second housing 12 may include at least one vent hole 121 located around the needle hole 122. Air may be communicated between the inside and the outside of the second housing 12 by the ventilation hole 121. According to an embodiment, the ventilation hole 121 may communicate with a flow path for forming a negative pressure. A more detailed description will be given later.

The loading unit 7 and/or the recovery unit 8 may be exposed to the outside of the housing 1 at an end portion of the third housing 13 in the second direction D2. Detailed description will be given later.

A cutting biopsy device according to an embodiment may include a first support unit 111 and a second support unit 15.

The first support unit 111 may be selectively coupled to the master block 3 at least in the loaded position to provide the master block 3 with resistance against the elastic force of the spring 5. To this end, according to an embodiment, the first support unit 111 may be the end of the housing 1, specifically, the opening 112 formed in the first housing 11 in the second direction D2. The launch unit 14, which will be described later, is positioned adjacent to the first support unit 111, and presses a part of the master block 3 which is hung on the first support unit 111 at the time of launching, and the first support unit 111 ) To the master block (3) can be released.

The second support unit 15 may be selectively coupled to the hub block 4 at least in the loaded position to provide the hub block 4 with resistance against the elastic force of the spring 5. To this end, according to an embodiment, the second support unit 15 is from one end of the housing 1, specifically another opening 113 formed in the first housing 11, toward the second direction D2 and It may be an elastic support formed to extend toward the inside of the first housing 11. One end of the second support unit 15 in the first direction D1 is coupled to the first housing 11, and the other end may extend from one end to be inclined toward the inner space of the first housing 11. The other end of the second support unit 15 may be separated from the first housing 11 and may elastically move to a certain degree around one end fixed to the opening 113. Accordingly, as the master block 3 moves toward the hub block 4 by the user's firing motion as described later, the master block 3 moves the second support unit 15 within the first housing 11. It is pressed so that the selective coupling between the hub block 4 and the second support unit 15 can be released.

The firing unit 14 may be located in the housing 1, and according to an embodiment, it may be located adjacent to the first support unit 111.

According to the embodiment shown in FIG. 8, the launch unit 14 has one end 141 coupled to the housing 1, specifically the first housing 11, and the other end 142 is a first support unit ( It may have a structure protruding toward the opening 112 adjacent to 111). The other end 142 of the firing unit 14 may have elasticity in a direction substantially perpendicular to the axial direction D, that is, in the vertical direction of the drawing. As the user presses the firing unit 14, the other end 142 of the firing unit 14 selectively passes through the opening 112 adjacent to the first support unit 111 to press the first fixing unit 34. It can be provided so as to.

One end 141 of the launch unit 14 may be coupled to the first housing 11, but is not limited thereto, and may be integrally formed with the first housing 11.

The needle set 2 may include an outer needle 21 and an inner needle 22. Figure 4a shows the combined cross-section of the inner needle 22, the outer needle 21, and the outer needle 21 and the inner needle 22, respectively.

4A, the outer needle 21 is provided in the form of a pipe so that the inner needle 22 is accommodated therein, and is formed to have a shorter length than the inner needle 22, so that a relative reciprocating motion based on the inner needle 22 It may be provided to be possible. The outer needle 21 has a first blade 211 formed in an inclined direction at an end of the first direction D1, and the end of the second direction D2 becomes a first fixed end 212 to form a master block. (3) can be fixed.

The inner needle 22 has an outer diameter corresponding to the inner diameter of the outer needle 21 so as to penetrate the outer needle 21, and is installed to penetrate the housing 10 in the axial direction D. A second blade 221 formed in an inclined direction is provided at the end of the fast needle 22 in the first direction D2, and the end of the second direction D2 becomes a second fixing end 222, and the recovery unit ( 8) can be fixed. According to the embodiment shown in Fig. 2, the fast needle 22 is shown to be fixed to the recovery unit 8, but the present invention is not necessarily limited thereto, and the embodiment having a different type of recovery unit 8 In this case, the second fixing end 222 of the fast needle 22 may be fixed to the housing 1. In the present invention, the fast needle 22 may maintain a state in which the second fixed end 222 is fixed and does not move during the loading and firing operation of the cutting biopsy device.

The first blade 211 and the second blade 221 may be formed to have an inclination in the same direction. At this time, the inclination angle of the first blade 211 and the second blade 221 does not necessarily have to be the same, and according to an embodiment, the inclination angle a1 of the first blade 211 is the second blade 221 It may be equal to or less than the inclination angle a2 of ). Accordingly, when the needle set 2 is inserted into the tissue, the tissue is prevented from being pinched between the first blade 211 and the second blade 221 to damage the collected tissue, and the needle set 2 is stably Can be inserted.

The present invention is not necessarily limited thereto, and as shown in FIG. 4F, it may be formed to have inclinations in directions opposite to each other. Even in this case, the second blade 221 protrudes to the outside of the outer needle 21, that is, the second blade 221 may have a structure protruding from the first blade 211. Accordingly, when inserting the needle set 2 into the tissue, it is possible to prevent the tissue from being pinched between the first blade 211 and the second blade 221 and to be stably inserted.

On the other hand, the inner needle 22 has a tissue collecting groove 223 formed adjacent to the second blade 221, and the tissue collecting groove 223 has a groove drawn in a predetermined depth from the surface of the inner needle 22 Can be. The first groove 223 may be formed to have a sufficient length and width so that a tissue can be collected by placing a tissue on its surface. The tissue collecting groove 223 may have a structure of a groove opened toward the upper side by removing a certain portion of the inner needle 22 by a predetermined depth, but is not necessarily limited thereto, and may be a structure of a groove opened toward the lower side. There may be, optionally, a structure of a groove open toward the side.

A communication path 224 may be formed in the fast needle 22 with a predetermined length. The communication path 224 is in communication with the tissue collecting groove 223, and as shown in FIG. 4B, a first valley structure formed to be cut along the longitudinal direction of the inner needle 22 (for example, in the direction of the axis D). It may be an incision groove. However, it is not necessarily limited thereto, and as can be seen in FIG. 4C, the communication path 224 includes a first groove 2241 formed to be spaced apart from the tissue collecting groove 223, the tissue collecting groove 223 and the first It may include a second cut groove 2242 connecting the groove 2241. The first groove 2241 may have the same shape as the tissue collecting groove 223 and may have a structure of a groove opened toward an upper side, a lower side, or a side by removing a predetermined depth of the corresponding portion of the inner needle 22. The first groove 2241 may have a structure opened toward the same direction as the tissue collecting groove 223. The first groove 2241 may be positioned to be spaced apart from the tissue collecting groove 223 in the second direction D2. Between the tissue collecting groove 223 and the first groove 2241, a part of the inner needle 22 is maintained as it is to become a barrier 225, and a second incision groove 2242 is formed in the barrier 225. ) May be formed in a valley structure so as to be cut along the longitudinal direction. Since the tissue collecting groove 223 and/or the first groove 2241 is formed by removing a specific portion of the inner needle 22 to a predetermined depth, it is easier to process than the incision groove described above. Therefore, after forming the tissue collecting groove 223 and the first groove 2241 to be spaced apart as shown in FIG. 4C, by forming a second cut groove 2242 in the barrier 225 between them, along the length direction of the needle Compared to the structure of FIG. 4B in which the groove is formed, workability may be further increased.

According to another embodiment, as can be seen in FIGS. 4D and 4E, the tissue collecting groove 223 may further include a second groove 2231 formed along the longitudinal direction thereof. The second groove 2231 may be connected to the communication path 224, and thus may be a portion to which a negative pressure to be described later is applied. The second groove 2231 may be formed to have a length of at least half of the length of the tissue collecting groove 223, so that the negative pressure is uniformly formed in the length of at least half of the entire length of the tissue collecting groove 223 can do.

On the other hand, according to one embodiment, the communication path 224 does not need to be formed over the entire length of the fast needle 22, as described later, at least a length that can communicate with the negative pressure forming region of the master block (3) Can be formed. As can be seen in FIG. 4A, a length t22 from one end of the inner needle 22 to the communication path 224 may be formed to be longer than the length t21 of the outer needle 21. Accordingly, as will be described later, when the master block 3 is moved, a negative pressure may be formed in the communication path 224 and/or the tissue collecting groove 223.

At least the outer needle 21 of the needle set 2 may be fixedly coupled to the master block 3 to perform movement in conjunction with the movement of the master block 3. The master block 3 is located in the housing 1. And the fast needle 22 may be installed to penetrate the master block 3, may be provided so as not to be coupled to the master block (3). The needle set 2 passes through the housing 1 and protrudes outward through the tip needle hole 122 of the housing 1.

On the other hand, the loading unit 7 moves the hub block 4 to the loading position by the user's operation, and at least a part extends from the end of the housing 1 in the second direction D2 toward the hub block 4 And, it may include a first handle 71 located outside the housing (1).

According to an embodiment, as can be seen in FIG. 5, the loading unit 7 has a first handle 71 provided in the shape of a plate exposed outside the second direction D2 of the third housing 13. . The loading unit 7 may include a second handle 72 extending from the first handle 71 in the first direction D1. The second handle 72 extends adjacent to the hub block 4 along the first direction D1, and supports the end 401 of the hub block 4 at the end of the first direction D1. A support 721 may be provided. According to an embodiment, the first support 721 may extend in a direction substantially perpendicular to the length direction of the second handle 72 and may be formed to hang the end 401 of the hub block 4. Accordingly, when the user pulls the first handle 71 in the second direction D2, the hub block 4 may move in the second direction D2 in connection therewith. The second handle 72 may extend into the housing 1 through the second opening 132 formed in the third housing 13 and move within the first housing 11. As shown in FIG. 5, the second handle 72 may be provided with a pair, but is not limited thereto, and the hub block 4 can be moved by the manipulation of the first handle 71. If it is, one or more may be provided.

The cutting biopsy device according to an embodiment of the present invention may further include a recovery unit 8.

The recovery unit 8 is provided to recover the tissue collected in the tissue collection groove 223, according to an embodiment, as shown in FIGS. 1 to 3 and 5, a third handle 81 ), and may include a second support 83.

More specifically, in the collection unit 8, a third handle 81 provided in a flat plate shape is positioned outside the housing 1 so that the user can grip it. The recovery unit 8 may further include a body 82 extending in the first direction D1 from the third handle 81 and inserted into the housing 1, according to an embodiment. The second fixed end 222 of the fast needle 22 described above may be fixedly coupled to the 82.

The main body 82 may be formed in the shape of a pipe, and a ring 84 may be provided at one end in the longitudinal direction. The body 82 may not come out of the housing 1 by this ring 84. The body 82 may be specifically positioned in the housing 1 through the first opening 131 of the third housing 13, wherein the ring 84 is in the housing 1 and the third housing 13 It is possible to prevent separation of the main body 82 in the second direction D2 by making it caught on. The structure of the ring 84 of the recovery unit 8 as described above can further improve the assembling property of the recovery unit 8 to the housing 1. That is, by inserting the ring 84 into the housing 1 through the first opening 131 of the third housing 13, the assembly of the recovery unit 8 to the housing 1 can be completed. have.

The second support 83 may extend from the third handle 81 in the first direction D1, the second support 83 being an outer surface of the housing 1, for example, the third housing 13 The outer surface of the second direction D2 of may be supported. According to an embodiment, as shown in FIG. 5, a third opening 711 is formed in the first handle 71, so that the second support 83 passes through the first handle 71 to allow the third housing 13. ) Can be supported. Accordingly, it is possible to prevent the main body 82 from moving in the first direction D1.

The second support 83 may be selectively released from the support of the housing 1 by a user's manipulation. According to an embodiment, the second support 83 may have a bar shape that extends in an oblique direction from the third handle 81, and accordingly, the user may be placed at the end of the second support 83 in the axial direction ( When a force is applied in the direction perpendicular to D), it bends and passes through the third opening 711 and the first opening 131 together with the main body 82 and can enter the interior of the housing 1 along the first direction D1. have. When the main body 82 enters the inside of the housing 1 along the first direction D1, the inner needle 22 coupled to the main body 82 moves in the first direction D1, and accordingly, the outer needle 21 ) Is exposed to the first groove 223 that was covered by the user can recover the tissue collected in the first groove 223.

According to an embodiment, the second support 83 as described above may be provided in a pair as shown in FIG. 5, but is not limited thereto, and support to the housing 1 is selectively performed by a user's manipulation. Various modifications may be applied as long as it is releasable by the user and allows the body 82 to be moved along the first direction D1 by the user's manipulation.

According to one embodiment, as can be seen in Figure 6, the spring 5 is in the housing 1 so that the master block 3 and the hub block 4 are aligned in-line along the axial direction D. Can be located.

The spring 5 may include a first portion 51 and a second portion 52 as can be seen in FIGS. 6 and 7. The first part 51 protruding to one side of the hub block 4 is fixedly coupled to the master block 3, and the second part 52 protruding to the other side of the hub block 4 is the housing (1), for example, may be combined with the third housing 13.

In a loaded state, that is, in a state where the master block 3 and the hub block 4 are sufficiently spaced apart, the first part 51 provides a first elastic force with respect to the master block 3 in the second direction D2. In addition, the second part 52 may provide a second elastic force to the hub block 4 in the first direction D1.

The first portion 51 and the second portion 52 may be provided to have different spring pitches, and the spring pitch of the first portion 51 may be smaller than the spring pitch of the second portion 52. I can. The first portion 51 and the second portion 52 have different spring pitches, but each portion may be provided to have a uniform spring pitch. According to an embodiment, the first portion 51 may have a tensile pitch relative to the second portion 52, and the second portion 52 has a compression pitch relatively higher than the first portion 51. It can be something to have. According to another embodiment, the first portion 51 may be wound to become a tension spring, and the second portion 52 may be wound to become a compression spring.

According to an embodiment, in a loaded state, that is, in a state in which the master block 3 is fixed, only the hub block 4 is moved in the second direction D2 and then fixed, the first part 51 and the second part All 52 are in a state of having an elastic force in the first direction D1 with respect to the hub block 4. Thereafter, when the fixation of the master block 3 in the housing 1 is released by the operation of the firing unit 14, the hub block 4 is still fixed in the housing 1, so that the first part ( The master block 3 moves in the second direction D2 by the restoring force of 51). Thereafter, when the fixing of the hub block 4 is released as the master block 3 contacts the hub block 4, the master block 3 and the hub block 4 are formed by the restoring force of the second part 52. At the same time, it moves in the first direction D1. In this way, according to the movement of the master block 3 in the second direction D2 and restoration in the first direction D1, the outer needle 21 coupled to the master block 3 simultaneously moves in the second direction D2 and It moves sequentially in the first direction D1, and accordingly, the tissue may be collected in the first groove 223.

Meanwhile, as shown in FIG. 7, the first portion 51 and the second portion 52 may have different diameters. According to an embodiment, the first portion 51 having a tensile pitch may be provided to have a smaller radius than the second portion 52 having a compressed pitch.

This spring 5 may be installed to pass through the through hole 41 of the hub block 4.

The through hole 41 may include a first through hole 411 through which the first part 51 of the spring 5 passes and a second through hole 412 through which the second part 52 passes. . The first through hole 411 and the second through hole 412 may be connected to each other.

According to an embodiment, the first through hole 411 may be formed with a first diameter d1 so as to correspond to the diameter of the first part 51, and the second through hole 412 may be a second part ( 52) may be formed with a second diameter d2. The first diameter d1 may be smaller than the second diameter d2. Therefore, when inserting the spring 5 into the through hole 41, the first part 51 can be inserted through the second through hole 412.

A fixed end 413 may be positioned between the first through hole 411 and the second through hole 412. The first part 51 and the second part 52 are located at the position of the fixed end 413, and the spring 5 at the fixed end 413 may be fixed to the hub block 4. .

The fixed end 413 may be formed in a stepped structure according to a difference in diameter between the first through hole 411 and the second through hole 412. As described above, due to the difference in diameter between the first portion 51 and the second portion 52, the end of the second portion 52 may be in close contact with the fixed end 413.

The hub block 4 moves in the second direction D2 by a loading operation, and the fixed end 413 pushes the end of the second part 52 in the second direction D2 to the second part 52 Is compressed. At this time, since the end of the second part 52 is in close contact with the fixed end 413, the spring 5 may be fixed in the hub block 4.

Even during the user's firing operation, since the end of the second part 52 pushes the fixed end 413 by the restoring force of the second part 52, the hub block 4 can move in the first direction D1. .

As such, the spring 5 may be fixedly coupled to the hub block 4 without a separate fixing mechanism. However, the present invention is not necessarily limited thereto, and a separate pin (not shown) is inserted into the hub block 4 from the outside of the fixed end 413, so that the first part 51 and the second part 52 of the spring 5 The spring 5 can be fixed in the hub block 4 by being fitted between ).

Referring to FIG. 7, in the spring 5 according to an embodiment, the first part 51 and the second part 52 may be integrally formed, but the present invention is not limited thereto, and the first The portion 51 and the second portion 52 may be separated from each other and fixed to the hub block 4, respectively.

8 is a cross-sectional view showing an embodiment of the master block 3. 2, 3, and 6, the master block 3 according to an exemplary embodiment can move in the axial direction D while being located in the housing 1. The master block 3 may include a first fixing unit 34 provided to be elastically movable in a direction perpendicular to its longitudinal direction. The first fixing unit 34 is provided so as to protrude from the surface of the master block 3 and may move elastically in a direction opposite to the protruding direction. Referring to FIG. 8, the first fixing unit 34 is caught by the first support unit 111, so that the movement of the master block 3 can be constrained by the first support unit 111. The other end 142 of the above-described firing unit 14 presses the first fixing unit 34 by the user's operation, and accordingly, the first fixing unit 34 is fixed to the first support unit 111 Can be released.

At least one first through hole 31 formed in the axial direction D is formed at an end of the master block 3 in the first direction D1, and the first through hole 31 is inside the master block 3 The flow path 32 in communication with the can be located. When there are a plurality of first through holes 31, the first through holes 31 may be connected to each other through a flow path 32. The first through hole 31 and the flow path 32 may form a first space 30. The outer needle 21 may be fixedly coupled to the portion 301 of the master block 3 adjacent to the first through hole 31. When there are a plurality of first through holes 31, the portion 301 may be a central part of the master block 3 between the first through holes 31. And the fast needle 22 can pass through the flow path 32, in particular, the communication path 224 of the fast needle 22 passes through the flow path 32, so that the communication path 224 and the flow path 32 communicate with each other. Can be. The communication path 224 of the inner needle 22 is formed to have a length sufficient to be connected to the flow path 32, and may be formed to have a length that can end through the flow path 32, and the master block 3 Even when maximally moved in the second direction D2, the communication path 224 and the flow path 32 may be formed to have a length capable of communicating with each other. However, the communication path 224 of the inner needle 22 is not formed to have a length that passes through the master block 3 in a state in which the master block 3 does not move in the second direction D2 as shown in FIG. 3. In this way, the sound pressure is completely formed and/or maintained in the communication path 224, and it is possible to prevent leakage of the sound pressure. When the communication path 224 passes through the master block 3 and extends to the space of the other housing 1, the sound pressure effect may be reduced. That is, the end 2240 of the second direction D2 of the communication path 224 in a state in which the master block 3 does not move in the second direction D2 is the first space 30 and the master block 3 ) May be located between the ends of the second direction D2. More specifically, the end portion 2240 of the communication path 224 in the second direction D2 may be located between the first space 30 and the coupling groove 33. In this case, the length t32 from the end of the first space 30 in the second direction D2 to the end 2240 of the communication path 224 is the length of the first space 30 in the axial direction D ( may be greater than or equal to t31). According to this structure, sound pressure may be effectively generated in the first space 30 and the communication path 224 during the firing process.

When tissue is collected, the master block 3 moves in the second direction D2 and then moves in the first direction D1 to return to its original position. The reciprocating motion of the master block 3 is fast. Will come true. At this time, the needle hole 122 and the first space 30 communicate with each other to achieve a flow of air. When the user inserts the needle set 2 into the tissue and collects the tissue, the master block 3 moves rapidly in the second direction D2, thereby moving the outer needle 21, and accordingly, the tissue collecting groove 223 This is opened and the tissue to be collected is seated in the tissue collection groove 223. At this time, the air forms an air flow path leading to the first space 30 and the communication path 224 through the needle hole 122, since air flows into the narrow gap of the needle hole 122. It becomes impossible to keep up with the moving speed of this master block 3, and thus, negative pressure is applied to at least a part of the above-described air flow path, for example, the first space 30 and the communication path 224. Therefore, the first space 30 and the communication path 224 and the tissue collection groove 223 communicated with the negative pressure is also operated to increase the adhesion to the tissue to be seated in the tissue collection groove 223, and accordingly, tissue collection efficiency This can be further improved. Immediately following, as the master block 3 moves rapidly in the first direction D1, the outer needle 21 moves to close the tissue collection groove 223, and at the same time, the tissue seated in the tissue collection groove 223 can be cut.

A coupling groove 33 to which the spring 5 is coupled is formed at an end portion of the master block 3 in the second direction D2. And, as can be seen in Figure 2, according to one embodiment, the outer surface of the master block 3 is a groove 35 so as not to interfere with the second handle 72 according to the movement of the axial direction (D) of the master block (3). Can be formed. The length of the groove 35 may correspond to the maximum travel distance in the axial direction D of the master block 3.

Optionally, the cutting biopsy device according to another embodiment may further include a pneumatic pressure control unit 6 interposed between the needle hole 122 and the master block 3. The air pressure control unit 6 controls the air flow from the needle hole 122 to the air flow path leading from the needle hole 122 to the first space 30 and the communication path 224, thereby causing a negative pressure effect applied to at least a part of the air flow path. It is possible to further increase, and accordingly, it is possible to further improve the tissue collection efficiency.

According to an embodiment, the pneumatic pressure control unit 6 may include a control block 61 located in the housing 1.

As shown in FIG. 8, the control block 61 may include a space 610 communicating with the first space 30 therein. This space 610 may communicate with the adjacent first space 30 and may also communicate with the needle hole 122 and/or the ventilation hole 121. The space 610 may include a second space 612 and a second through hole 614, and the outer diameter of the second space 612 and/or the second through hole 614 is the first space 30 May be smaller than the outer diameter of Accordingly, the needle hole 122 and/or the ventilation hole 121, the space 610, and the air flow path leading to the first space 30 can be formed in a structure having a high resistance, thereby reducing the above-described negative pressure effect. It can be even higher.

According to the exemplary embodiment shown in FIG. 9, the control block 61 may include a wall 611 located on one side and a second space 612 located on the other side. The second space 612 may communicate with the needle hole 122 and/or the ventilation hole 121 through at least one second through hole 614 formed in the wall 611. The second space 612 may communicate with the first space 30 of the master block 3. According to an embodiment, the total volume of the second through hole 614 may be smaller than the second space 612. Accordingly, resistance to the flow of air introduced through the needle hole 122 and/or the ventilation hole 121 may be generated, which may be more effective in generating the aforementioned negative pressure. The control block 61 may be fixed inside the housing 1 and may function as a stopper for movement of the master block 3. The control block 61 may function as a cushion for the master block 3, and thus may be provided as a buffer member. Accordingly, noise caused by the master block 3 hitting the control block 61 can be reduced, and this can allow the patient to receive the treatment in a comfortable state without feeling overwhelming.

Optionally, the air pressure control unit 6 may further include a first film assembly 62 and/or a second film assembly 63. As can be seen in FIGS. 8 and 9, the first film assembly 62 and/or the second film assembly 63 may be positioned on both sides of the axial direction D around the control block 61. However, the present invention is not necessarily limited thereto, and only at least one of the first film assembly 62 and the second film assembly 63 may be provided.

The first film assembly 62 is located between the needle hole 122 and/or the ventilation hole 121 and the control block 61, and at least one cutout 622 radially cut from the central hole 621 ), and a frame 623 is provided at the edge to be fixed inside the housing 1. According to an embodiment, at least the frame 623 of the first film assembly 62 is a control block 61 ) Can be attached. The first film assembly 62 may be able to flow in the flow of air by the central hole 621 and the cutout 622.

The second film assembly 63 is located between the control block 61 and the master block 3, has at least one cutout 632 radially cut from the central hole 631, and has a frame ( 633) may be provided and attached to the master block 3. Therefore, the second film assembly 63 moves like the master block 3 as shown in FIG. 10. The second film assembly 63 may be able to flow in the flow of air by the central hole 631 and the cutout 632. An area of the second film assembly 63 may be larger than an opposite cross-sectional area of the second space 612.

The central holes 621 and 631 of the first film assembly 62 and the second film assembly 63 communicate with each other, through which the needle set 2 may pass.

According to the first film assembly 62 and/or the second film assembly 63, resistance is applied to the flow of air through the first film assembly 62 and/or the second film assembly 63, so that the flow of air may be further controlled. As can be seen in FIG. 8, when the master block 3 is not moved in the second direction D2, the second film assembly 63 is adjacent to the end of the master block 3 in the first direction D1. , The second film assembly 63 may block a flow of air formed into the first space 30 from the needle hole 122 and/or the ventilation hole 121 to some extent. Thereafter, as shown in FIG. 10 according to the firing operation, when the master block 3 moves in the second direction D2, the second film assembly 63 moves in the second direction D2 together with the master block 3 At this time, since the first film assembly 62 faces the control block 61 in the second direction D2 and is difficult to bend, the ventilation hole 121 and/or the needle hole 122 Through this, it is possible to some extent prevent air from flowing between the master block 3 and the control block 61. Accordingly, a sound pressure is formed in the space between the master block 3 and the control block 61 and in the first space 30. Accordingly, a negative pressure is also applied to the communication path 224 and the tissue collecting groove 223 communicated with the first space 30, so that adhesion to the tissue seated in the tissue collecting groove 223 may be improved.

Meanwhile, when the master block 3 moves in the first direction D1 again and is restored to its original position, the second film assembly 63 together with the master block 3 also moves in the first direction D1. At this time, since the second film assembly 63 faces the master block 3 and is difficult to bend, it is controlled with the master block 3 by the movement of the master block 3 and the second film assembly 63. The air between the blocks 61 is pushed out in the first direction (D1), and this air passes through the space 610 and the second through hole 614 of the control block 61, and the communication hole 121 and/or the needle It may be discharged into the hole 122. At this time, the first film assembly 62 can be sufficiently bent in the first direction D1 to allow air between the master block 3 and the control block 61 to pass through the communication hole 121 and/or the needle hole 122 ) To smoothly discharge. Therefore, the master block 3 can move smoothly in the first direction D1 without air resistance.

Optionally, according to another embodiment, a fourth space 123 may be further positioned between the first film assembly 62 and the needle hole 122 and/or the ventilation hole 121. Therefore, the air flow from the first space 30 to the needle hole 122 and/or the ventilation hole 121 may further pass through the fourth space 123, and at this time, the first film assembly 62 It is possible to secure enough space to bend in one direction (D1).

Although not shown in the drawing, optionally, a support block (not shown) may be further positioned adjacent to the needle hole 122 in the fourth space 123. The support block is in communication with the needle hole 122, and the guide further extends toward the tip end of the first direction D1 to be fitted into the needle hole 122. The needle set 2 may be installed to pass through the support block, and at least the inner diameter of the support guide of the support block may have a size corresponding to the outer diameter of the needle set 2. Such a support block can minimize the shaking of the needle set 2 during the procedure, thereby helping to accurately collect the target site. In addition, needle sets 2 of various sizes are used according to the target tissue and the contents of the procedure.By forming the support block to correspond to the size of the needle set 2, it is simple to replace the support block when changing the needle set. Can be set.

On the other hand, the hub block 4 may be located in the housing 1, which is provided so that the inner needle 22 penetrates, and is arranged to be aligned in-line along the master block 3 and the axial direction D. Can be. 2 and 3, the hub block 4 may be located adjacent to the master block 3.

The hub block 4 may be fixed to the second support unit 15 in a loaded state after proceeding in the second direction D2. As the master block (3) moves toward the hub block (4) by the user's firing motion, when the master block (3) presses the second support unit (15), the hub block (4) and the second support unit (15) Selective coupling between the can be released. In this case, the master block 3 and the hub block 4 simultaneously advance in the first direction D1 by the spring 5.

Next, an operation of the cutting biopsy device according to an embodiment will be described with reference to the drawings.

In the ready state, as shown in FIG. 2, the master block 3 and the hub block 4 may be positioned side by side at the end of the housing 1 in the first direction D1. In this case, the spring 5 may be in a state in which no elastic force is applied. Further, the second support 83 of the recovery unit 8 supports the outer end of the third housing 13.

In this state, when the user grabs the first handle 71 and pulls it in the second direction D2, the second handle 72 is also moved in the second direction D2, and at the same time, the hub block 4 is moved to the second direction D2. It moves in the direction D2. When the hub block 4 moves to the third housing 13, the end portion 401 of the hub block 4 (see FIG. 5) may be fixed to the second support unit 15. This state becomes the loaded state. At this time, since the first fixing unit 34 of the master block 3 is hung on the first support unit 111, the master block 3 is in a fixed state without moving. When the loading is complete, the user pushes the first handle 71 back in the first direction D1 to move it to its original position, so that the loading unit 7 does not interfere with the movement of the hub block 4 in the firing operation. can do.

The user can simply finish the loading operation by holding the cutting biopsy device with one hand and pulling the first handle 71.

At this time, since the movement of the master block 3 is inhibited by the first support unit 111, the first part 51 of the spring 5 is tensioned as the distance between the master block 3 and the hub block 4 is separated. Accordingly, an elastic force is generated in the first part 51. At this time, the second part 52 is in a compressed state and has elasticity.

In this state, the user can simultaneously insert the outer needle 21 and the inner needle 22 of the cut biopsy device into the patient's tissue and prepare for firing.

After that, the user presses the launch unit 14 to proceed with the launch phase.

When the user presses the firing unit 14, the other end 142 of the firing unit 14 presses the first fixing unit 34, and eventually the first fixing unit 34 against the first support unit 111 Release the lock. Accordingly, the master block 3 is moved in the second direction D2 by the restoring force of the first part 51 of the spring 5, and at the same time, it moves in the second direction D2 fixed to the master block 3 The tissue collection groove 223 may be exposed, and the tissue to be collected may be pushed and seated into the tissue collection groove 223.

At this time, as described above, a negative pressure is operated in the communication path 224 and the first space 30 communicated with the tissue collecting groove 223 to increase adhesion to the tissue to be seated in the first groove 223, and , Accordingly, the efficiency of tissue collection may be further improved.

Meanwhile, as the master block 3 moves in the second direction D2, the second support unit 15, which has been inserted into the housing 1 and fixing the hub block 4, is transferred to the master block 3 When pressed, the selective coupling between the hub block 4 and the second support unit 15 is released. Then, the master block 3 and the hub block 4 simultaneously advance in the first direction D1 by the elastic force of the second portion 52 of the spring 5.

In this way, as the master block 3 is restored to its original state by the elastic force of the spring 5, the outer needle 21 fixed to the master block 3 moves in the first direction D1 to cover the tissue collecting groove 223 As a result, the tissue in the upper portion of the tissue collection groove 223 is cut. Accordingly, the collected tissue is located between the outer needle 21 and the tissue collection groove 223. At this time, as described above, the second film assembly 63 faces the master block 3 so that it is difficult to bend, and the first film assembly 62 is sufficiently bent in the first direction D1. Therefore, the air between the master block 3 and the control block 61 is pushed out in the first direction D1 by the movement of the master block 3 and the second film assembly 63, and this air is It may be discharged to the communication hole 121 and/or the needle hole 122 through the space 610 and the second through hole 614 of the control block 61. Therefore, the master block 3 can move smoothly in the first direction D1 without air resistance.

After that, the user removes the needle set 2 from the patient's body and collects the collected tissue.

In the recovery step, the user manipulates the second support 83 to release the support to the housing 1, and displaces the third handle 81 in the first direction D1 so that the main body 82 is moved in one direction (D1). To enter the interior of the housing (1). When the main body 82 enters the interior of the housing 1, the inner needle 22 coupled to the main body 82 moves in the first direction D1, and accordingly, the tissue collecting groove that was covered by the outer needle 21 ( 223) is exposed so that the user can recover the tissue collected in the tissue collection groove 223.

As described above, since one embodiment of the present invention allows the collected tissue to be recovered by a simple operation, the user can proceed to the next tissue collection operation immediately, thereby facilitating a plurality of consecutive tissue collection.

After recovering the tissue, the user can pull the third handle 81 in the second direction D2 to expose the second support 83 to the outside of the housing 1 again to prepare for the next launch.

As described above, although the embodiments have been described by the limited embodiments and the drawings, various modifications and variations are possible from the above description to those of ordinary skill in the art. For example, the described techniques are performed in a different order from the described method, and/or components such as a system, structure, device, circuit, etc. described are combined or combined in a form different from the described method, or other components Alternatively, even if substituted or substituted by an equivalent, an appropriate result can be achieved. Therefore, other implementations, other embodiments, and claims and equivalents fall within the scope of the claims to be described later.

Claims (5)

A housing extending in the axial direction and including a needle hole at one end;
It has a tissue collecting groove for collecting tissue at one end, and includes an inner needle fixed at the other end and an outer needle provided in a pipe shape to accommodate the inner needle so as to be slidable along the inner needle, and outside the housing through the needle hole Three needles positioned to protrude into;
A master block coupled to one end of the outer needle and positioned in the housing to be movable in the axial direction;
A first space located in the master block and communicating with the tissue collecting groove;
A hub block positioned in the housing to enable movement in the axial direction;
A spring coupled to the hub block and the master block;
A first support unit selectively coupled to the master block at least in a loaded position;
A second support unit selectively coupled to the hub block at least in a loaded position;
A loading unit for moving the hub block to the loading position; And
At least a launch unit provided to selectively release the coupling of the first support unit and the master block; Including,
The fast needle is in communication with the tissue collecting groove and the first space and includes a communication path formed along a length direction,
The communication path is a cutting biopsy device that communicates with the first space in a state in which the master block has moved and a state in which the master block has not moved, and is formed to have a length that does not pass the master block in a state in which the master block has not moved. The method of claim 1,
Further comprising a pneumatic pressure control unit interposed between the needle hole and the master block,
The air pressure control unit,
A cutting biopsy device comprising a control block located in the housing, interposed between the needle hole and the master block, and having at least one through hole communicating with the first space. The method of claim 2,
The air pressure control unit,
The cutting biopsy device further comprises at least one film assembly interposed between at least one of the control block and the needle hole and between the control block and the master block and provided to flow in the air flow. The method of claim 1,
Further comprising a recovery unit provided to recover the tissue collected in the tissue collection groove,
The recovery unit,
A third handle coupled to the inner needle and positioned outside the housing; And
A cutting biopsy device comprising a; a support extending from the third handle and provided to selectively support the outside of the housing. The method according to any one of claims 1 to 4,
The total length of the communication path is a cutting biopsy device provided longer than the length of the outer needle.

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