KR102134469B1 - Core biopsy device - Google Patents

Abstract

The present invention relates to a cutting biopsy device that can be easily loaded by minimizing the change in the gripping type, and by newly presenting a movement relationship between the inner needle and the outer needle when firing, the accuracy of tissue collection is further improved, and It relates to an amputated biopsy device that can further increase safety and simplify the recovery of the collected tissue.

Description

Cutting biopsy device {Core biopsy device}

An embodiment of the present invention relates 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.

Meanwhile, techniques for improving accuracy such as using an ultrasonic guide device to accurately reach the above-described tissue to be collected have been developed. However, in the case of the prior art, the surgeon generally changes the form of gripping the biopsy device or is loaded with both hands, and for this reason, there is a possibility that targeting of the ultrasound guide may be disturbed, especially when repeated harvesting is required several times.

Korean Patent Registration No. 10-1463867 Korean Patent Registration No. 10-1551311

The present invention is to overcome the problems and/or limitations of the prior art described above, and is to provide a cutting biopsy device that can easily perform loading by minimizing the change of the grip shape with only one hand holding the cutting biopsy device. There is a purpose.

In addition, another object of the present invention is to provide a cutting biopsy device capable of further improving the accuracy of tissue collection and further increasing the safety at the time of collection by newly presenting the movement relationship between the inner needle and the outer needle when firing.

In addition, another object of the present invention is to provide a cut biopsy device capable of easily recovering a tissue collected by a biopsy device.

In addition, another object of the present invention 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 is, in order to achieve the above object, the cutting biopsy device according to an embodiment of the present invention extends in the axial direction, and A housing having a hollow portion extending in the axial direction and at least one opening in communication with the hollow portion, an inner needle having a tissue collecting groove at one end, and an outer needle provided in the form of a pipe so that the inner needle is accommodated, and some A set of needles located in the hollow part, connected to one end of the outer needle, provided to penetrate the inner needle, and provided to allow movement in the axial direction, the master block located in the hollow portion, and provided to penetrate the inner needle , A hub block positioned in the hollow portion so as to be movable in the axial direction, and a first portion coupled to the hub block to pass through the hub block and protruding toward one side of the hub block is coupled to the master block, and the hub A spring in which a second portion protruding to the other side of the block is coupled to the housing, a first support unit selectively coupled to the master block at least at a loading position, and a second support selectively coupled to the hub block at least at a loading position It may include a unit, a loading unit for moving the hub block to the loading position, and a launch unit provided to selectively release a combination of at least the first support unit and the master block.

The first portion and the second portion may have different spring pitches.

In the loaded position, the first part is provided to apply a first elastic force to the master block, and the second part is provided to apply a second elastic force in a direction different from the first elastic force to the hub block. I can.

The first portion and the second portion may be provided to have different diameters.

The hub block includes a first through hole through which the first portion passes, and a second through hole through which the second portion passes, and includes a fixed end positioned between the first through hole and the second through hole. It may contain more.

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, the user manipulates the loading unit in a manner that applies a gripping force in a gripped state, and is pushed back through this, so that a restoring force is applied to the first spring and the second spring. By having the reciprocating motion structure in which the and outer needles enter the body together, the outer needle retreats from the inner needle, and then advances, minimizing the change of the grip shape with only one hand holding the biopsy device, and reloading once or multiple times. It has the effect of providing a biopsy device having a loading and firing structure that can be easily performed and can easily change the loading form for collection of small or large amounts, and a dense film structure or a hard calcification structure by the forward firing of the fast needle It may not be able to penetrate or bend, and as a result, the nodule may be pushed backward or the fast needle may not reach the exact region of the tissue to be collected, thereby solving the problem that the procedure becomes very difficult.

On the other hand, when using the ultrasonic guide, the user can perform the loading and firing with only one hand while holding the ultrasonic guide, so that the targeting is accurately maintained, thereby increasing the accuracy of the procedure.

On the other hand, by moving the outer needle connection bar after tissue collection by the connection structure of the outer needle connection bar of the master block to which the outer needle is fixed, it is possible to easily recover the tissue existing in the tissue collection groove of the inner needle without any other operation. It has the effect of allowing simple sample collection.

On the other hand, it is possible to further implement additional functions by extending the length of the master block in the moving direction and increasing it so that it moves in close contact with the hollow part of the housing, and has the 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, it is possible to easily perform loading 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.

In addition, in the present invention, since the collected tissue can be easily recovered, and this can be performed with only the hand holding the device, the degree of freedom of the other hand can be increased.

In addition, it is possible to simply control the rotation angle of the first handle, and accordingly, it is possible to facilitate loading with one hand.

Since the first handle can be easily unlocked from the housing, the preloading operation can be performed with one hand, thereby increasing the degree of freedom of the other hand.

When the first handle is unlocked, the connector is immediately positioned in a loadable state, so that loading can be performed immediately.

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.
Figure 2 is a partial cross-sectional view of the cut biopsy device of Figure 1;
3 is a cross-sectional view of a housing of a cutting biopsy device according to an embodiment.
4 is a view for explaining the structure of a needle set according to an embodiment.
5 is a view showing a cutting biopsy device according to an embodiment.
6 is an exploded view showing a master block of a cutting biopsy device according to an embodiment.
7 is a view showing a hub block of a cutting biopsy device according to an embodiment.
8 is a view showing an arrangement state of a spring, a master block, and a hub block according to one embodiment.
9 is a cross-sectional view showing a coupled state of a spring and a hub block according to an embodiment.
10 is a view for explaining the operation step of the cutting biopsy device according to an embodiment.
11 is a perspective view schematically illustrating a hub block according to a modification of the present invention.

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 to describe one technical feature or constituent elements constituting the invention.

1 is a side view of a cutting biopsy device according to an embodiment, and FIG. 2 is a partial cross-sectional view of FIG. 1.

1 and 2, a cutting biopsy device according to an embodiment includes a housing 10, a needle set 200, a master block 30, a hub block 40, a spring 50, a loading unit ( 500) and a launch unit 180.

As can be seen in FIG. 3, the housing 10 is formed to extend in the axial direction (D), and may include a hollow portion 11 extending in the axial direction (D) therein. The hollow part 11 may form a substantially closed space except for the needle set 200 to be described later through. The housing 10 has a first opening 110 in communication with the hollow part 11, and through this first opening 110, the hub block 40 and the loading unit 500 are connected to each other as described later. I can.

A hole 12 is formed at the end of the housing 10 in the first direction (D1), the hole 12 communicates with the hollow portion 11, and through the hole 12 as described later Needle set 200 may pass.

A partition wall 102 is installed adjacent to the hole 12, and the hollow portion 11 is divided by the partition wall 102 to have a compartment 103. A hole aligned with the hole 12 is formed in the partition wall 102 so that the needle set 200 passes through it.

A support block 15 to be described later is coupled to the compartment 103.

The housing 10 may include a second opening 111, the second opening 111 is formed at a position opposite to the first opening 110, and may communicate with the hollow portion 11 .

The launch unit 180 may be located in the housing 10, and according to an embodiment, it may be located adjacent to the second opening 111.

The firing unit 180 may include a first firing unit 182 and a second firing unit 183. The first launch unit 182 has elasticity in a direction approximately perpendicular to the axial direction D, that is, in the vertical direction of the drawing, and may extend from the housing 10 to be spaced apart from the second opening 111 . The second firing unit 183 is extended toward the second opening 111 from the end of the first firing unit 182, and selectively opens the second opening 111 as the user presses the firing unit 180. It can be provided facing.

The launch unit 180 may be integrally formed with the housing 10. In particular, the first launch unit 182 may be formed such that one end is connected to the housing 10. In this way, by integrally molding the launch unit 180 with the housing 10, the number of parts can be reduced, and the process of assembling the launch unit 180 and the housing 10 can be reduced, thereby further maximizing mass production. I can.

At one end of the housing 10, a hinge axis 17 is located adjacent to the hole 12, the hinge axis 17 being located on the opposite side of the firing unit 180 with the hollow portion 11 as the center. can do. The first handle 51 of the loading unit 500 to be described later may be hinged to the hinge shaft 17. According to the embodiments shown in the drawings, the hinge shaft 17 is located at the end of the housing 10 in the first direction D1, but the present invention is not necessarily limited thereto, and the hinge shaft 17 is a housing It may be located at the end of the second direction D2 of (10). Of course, in this case, the locking unit 161 to be described later may be located at the end of the housing 10 in the first direction D1.

A protrusion 101 protruding outward may be further formed at an approximately central portion of the housing 10, and the protrusion 101 includes the first handle 51 of the loading unit 500 as described below. It is provided to press the first handle 51 when in close contact, so that the first handle has an elastic force in a direction away from the housing 10.

According to the embodiment shown in FIG. 2, a support block 15 may be further positioned adjacent to the hole 12 at one end of the housing 10. According to an embodiment, the compartment 103 is All can be combined to fill.

The support block 15 is provided so that the inside of the support block 15 communicates with the hole 12, and the support guide 151 may further extend toward the tip of the first direction D1 to penetrate the hole 12. The support guide 151 is formed in the shape of a pipe and is arranged coaxially with the hole 12, and accordingly, may communicate with the hole 12.

A needle set 200 to be described later may be installed to penetrate the support block 15. Accordingly, at least the support guide 151 of the support block 15 may have an inner diameter corresponding to the outer diameter of the needle set 200. This support block 15 can minimize the shaking of the needle set 200 during the procedure, thereby helping to accurately collect the target portion. In addition, a needle set 200 of various sizes is used according to the target tissue and the contents of the procedure.In an embodiment of the present invention, the support block 15 is adapted to correspond to the size of the needle set 200, and in particular, a support guide By forming the inner diameter of 151 to correspond to the outer diameter of the needle set 200, since the support block 15 can be changed when the needle set is changed, there is an advantage that a needle set 200 of several sizes can be used with one mechanism. And, it is possible to simply set the needle set (200).

The housing 10 may further include a first stopper 171. The first stopper 171 may be positioned between the hole 12 and the hinge shaft 17, and may be positioned closer to the hinge shaft 17. The rotation angle of the first handle 51 may be regulated within a predetermined range by the first stopper 171 and/or the second stopper 516 to be described later.

The loading unit 500 may include a first handle 51 and a connector 52. The first handle 51 may have one end 511 hingedly coupled to the hinge shaft 17 of the housing 10 and the other end 512 open. The first handle 51 may include a second stopper 516 positioned adjacent to the first stopper 171. The second stopper 516 comes into contact with the first stopper 171 in a state in which the first handle 51 rotates at the maximum angle around the hinge axis 17, so that the first handle 51 becomes the hinge shaft 17. It is possible to prevent further meetings around. Although this embodiment is shown to include both the first stopper 171 and the second stopper 516, the present invention is not necessarily limited to this, among the first stopper 171 and the second stopper 516 It may be sufficient to include at least one.

The connector 52 may be provided so that one end 521 is hingedly coupled to be rotatable around the center of the first handle 51 and the other end 522 faces the hub block 40. A separate elastic member 53 may be connected between the connector 52 and the first handle 51, and accordingly, the other end 522 of the connector 52 may receive an elastic force in the first direction D1. have. The first handle 51 may include a groove 514 formed in a position overlapping with the first handle 51 by rotating the connector 52, and accordingly, the first handle 51 is the housing 10 Since the connector 52 is located in the groove 514 in a state of being rotated adjacent to the connector 52, it is possible to prevent the connector 52 from interfering with the movement of the first handle 51.

A locking unit 161 may be positioned at the other end of the housing 10, that is, an end opposite to the hinge shaft 17. The locking unit 161 extends in a direction perpendicular to the axial direction (D), and referring to FIG. 2, the end thereof is formed in a hook shape, so that it is in the hole 515 of the other end 512 of the first handle 51. It is equipped so that it can be caught. The locking unit 161 may be provided to have elasticity in a direction perpendicular to its longitudinal direction, and thus, as described later, the fixing to the first handle 51 may be released by a simple operation by a user. The locking unit 161 is not necessarily coupled to the housing 10 and may be coupled to the other end 512 of the first handle 51. Of course, in this case, the hole 515 may be formed in the housing 10.

Meanwhile, as shown in FIG. 5, the first handle 51 may be provided to have a predetermined curvature R in the longitudinal direction while being coupled to the housing 10 by the locking unit 161. The first handle 51 may be formed of a metal and/or synthetic resin material, and may have a predetermined elasticity due to the characteristics of the material. Since the first handle 51 is pressed against the protrusion 101 of the housing 10 in a state coupled to the housing 10 by the locking unit 161, the first handle 51 is pressed in this state. 51 may have an elastic force in a direction substantially perpendicular to its longitudinal direction, for example, in a direction opposite to the locking unit 161. In this way, when the first handle 51 has an elastic force in a direction perpendicular to the length direction, the first handle 51 has a potential in the direction in which the coupling by the locking unit 161 is released, and accordingly, the user has a hook shape. By lightly touching the locking unit 161 of the first handle 51 by the locking unit 161 can be released. This may further enhance the user's handling of the first handle 51.

The housing 10 may include a first support unit 13 and a second support unit 14.

The first support unit 13 may be selectively coupled to the master block 30 at least in the loaded position to provide the master block 30 with resistance to the elastic force of the spring 50. To this end, according to an embodiment, the first support unit 13 may be an end of the second opening 111 formed in the housing 10 in the second direction D2. The above-described second launch unit 183 is positioned adjacent to the first support unit 13 and presses a part of the master block 30 hanging on the first support unit 13 when firing to the first support unit. It is possible to release the jamming of the master block 30 for (13).

The second support unit 14 may be selectively coupled to the hub block 40 at least in a loaded position to provide the hub block 40 with resistance against the elastic force of the spring 50. To this end, according to an embodiment, the second support unit 14 may be an elastic support formed to extend from the first opening 110 formed in the housing 10 toward the second direction D2. One end 141 of the second support unit 14 is coupled to the housing 10, and the other end 142 extends from one end 141 so as to incline toward the hollow portion 11. The other end 142 of the second support unit 14 is separated from the housing 10 and may elastically move to a certain degree around the one end 141. Accordingly, as the master block 30 moves toward the hub block 40 by the user's firing operation as described later, the hub block 40 is pressed as the master block 30 presses the second support unit 14. The selective coupling between the and the second support unit 14 can be released.

Meanwhile, the housing 10 may further include a third opening 121 as shown in FIG. 1. The third opening 121 may be formed on one side of the housing 10, for example, may be formed on the side of the housing 10 adjacent to the launch unit 180 as shown in FIG. 1. As will be described later through the third opening 121, the second handle 331 is exposed to the outside of the housing 10, so that the user can manipulate the second handle 331.

The needle set 200 may include an inner needle 20 and an outer needle 21.

Referring to Figure 4, the inner needle 20 has a tissue collecting groove 202 is formed at one end, the tissue collecting groove 202 has a structure of a groove open toward the upper side or the lower side. The fast needle 20 may be installed to penetrate the housing 10 in the axial direction D, and the other end 201 of the fast needle 20 may be fixed to an end portion of the housing 10 in the second direction D2.

The outer needle 21 is provided in the form of a pipe so that the inner needle 20 is accommodated therein, and may be formed to have a shorter length than the inner needle 20. The outer needle 21 has a blade 212 formed at one end to cut the tissue accommodated in the tissue collecting groove 202, and may be provided to reciprocate based on the inner needle 20. The blade 212 may be provided with an inclination in a direction different from the end of the fast needle 20, but is not limited thereto, and may be provided to have an inclination in the same direction as the end of the fast needle 20.

The needle set 200 passes through the housing 10 and protrudes outward through the tip hole 12 of the housing 10. Therefore, a part of the needle set 200 is located in the hollow part 11.

Although not shown in the drawings, according to an embodiment, a predetermined space may be formed between the outer needle 21 and the inner needle 20, and this space may be connected to the tissue collecting groove 202. In addition, a hole 211 may be formed at the other end of the outer shell 21, which is formed in a direction perpendicular to the axial direction D, and communicates with the space inside the outer shell 21. have. When the master block 30 is moved through the hole 211, a negative pressure may be formed in the inner space of the outer surface 21.

At least the outer needle 21 of the needle set 200 is fixedly coupled to the master block 30 to perform movement in conjunction with the movement of the master block 30. The master block 30 is located in the hollow part 11. And the fast needle 20 may be installed to penetrate through the master block 30, may be provided so as not to be coupled to the master block 30.

Referring to FIG. 6, the master block 30 may include a base 301 and a cover 302. The base 301 has a space 304 so that the connection bar 33 to be described later can be coupled, and an opening 305 is formed on one side thereof to expose the second handle 331 of the connection bar 33 You can do it. The base 301 may include a third support unit 303 positioned adjacent to the opening 305. The third support unit 303 may have a wedge shape protruding from the bottom sidewall of the base 301 toward the inner space 304, and accordingly, will be provided to selectively block the movement of the connection bar 33. I can. However, it is not necessarily limited thereto, and may be a protrusion shape protruding toward the space 304, for example, any shape can be applied as long as it selectively blocks the movement of the connection bar 33.

The connection bar 33 may be fixedly coupled to the end of the outer needle 21, and may be provided to penetrate the inner needle 20 without being coupled to the inner needle 20.

This connection bar 33 is built in the master block 30, may be mounted in the master block 30, is provided to move along the length direction of the master block 30. In addition, portions of the connection bar 33 other than the portion connected to the outer needle 21 may include an elastic portion 335 having a predetermined elasticity in a direction perpendicular to the length direction of the master block 30. A second handle 331 provided to be exposed to the outside of the master block 30 may be positioned adjacent to one end 336 of the elastic portion 335. This second handle 331 is exposed to the outside of the master block 30 through the above-described opening 305, which is the housing 10 through the third opening 121 formed in the housing 10, referring to FIG. ) Can be exposed to the outside. The elastic portion 335 of the connection bar 33 may be selectively fixed in position by the third support unit 303 described above. That is, while the connection bar 33 is positioned at one end of the master block 30, the end 336 of the elastic portion 335 may be maintained in a state that is hung on the third support unit 303 described above. When the elastic portion 335 is bent in a direction perpendicular to the length direction of the master block 30 by external pressure, the engaging state of the end portion 336 and the third support unit 303 may be released.

When operating the second handle 331, the user first presses the second handle 331 in a direction perpendicular to the length direction of the master block 30, and then presses the master block 30 of the third opening 121. By moving along the longitudinal direction, the connecting bar 33 can be moved. As the connection bar 33 moves in this way, the outer needle 21 coupled to the connection bar 33 can also move in the same manner, and accordingly, the tissue collecting groove 202 of the inner needle 20 as shown in FIG. 4 It can be exposed to the outside.

A fixing block 337 provided so that the inner needle 20 passes may be further positioned adjacent to the connection bar 33. The fixing block 337 is fixedly coupled to the inside of the master block 30, and one end of the spring 50 to be described later may be fixed.

The cover 302 is coupled to the base 301, and a first fixing unit 31 provided to be elastically moved in a direction perpendicular to the length direction of the master block 30 on the surface of the cover 302 It can be provided. The first fixing unit 31 is provided to protrude from the surface of the cover 302, and may move with elasticity in a direction opposite to the protruding direction. In the loaded state, this first fixing unit 31 is caught by the first support unit 13, so that the movement of the master block 30 can be constrained by the first support unit 13 (see Fig. 3). . The second launch unit 182 of the above-described launch unit 180 presses the first fixing unit 31 by the user's manipulation, and accordingly, the first support unit 13 of the first fixing unit 31 Can be released.

The master block 30 may further include a release unit 32. The release unit 32 is located at a portion of the master block 30 facing the hub block, and according to an exemplary embodiment, the release unit 32 may be provided to extend toward the hub block 40 in the second direction D2. According to an embodiment, the release unit 32 may be a plate member extending toward the hub block 40.

The hub block 40 may be located in the hollow part 11, provided so that the inner needle 20 penetrates, and arranged in-line along the master block 30 and the axial direction (D) It can be arranged as much as possible. Referring to FIG. 2, the hub block 40 may be located adjacent to the master block 30.

Referring to FIG. 7, a spring 50 may be coupled to pass through the hub block 40 according to an exemplary embodiment. The spring 50 has a first portion 501 and a second portion 502 integrally formed, and the first portion 501 and the second portion 502 penetrate through the hub block 40 to form a hub block. (40) It may be fixedly installed on the hub block 40 so as to protrude outward.

The hub block 40 may include a fourth support unit 443. The fourth support unit 443 may be formed toward the loading unit 500. According to an exemplary embodiment with reference to FIG. 7, the fourth support unit 443 may be provided to have a step on the bottom surface of the hub block 40. Referring to FIG. 2, the fourth support unit 443 is provided to support the other end 522 of the connector 52. Therefore, as the user holds the first handle 51 and holds it in the direction of the housing 10 with one hand, the hub block 40 is moved in the second direction while the connector 52 is supported by the fourth support unit 443. Go to (D2).

The hub block 40 may include a second fixing unit 42. The second fixing unit 42 may be a step portion formed in a direction perpendicular to the axial direction D on the hub block 40. The hub block 40 may be fixed to the second support unit 14 in the loaded state after the hub block 40 proceeds in the second direction D2 by the second fixing unit 42. According to an embodiment, the second fixing unit 42 and the release unit 32 of the master block 30 may be formed to correspond to each other in a shape that can be coupled to each other. When the hub block 40 proceeds in the second direction D2 during loading, the hub block 40 proceeds beyond the second support unit 14, and the other end of the second support unit 14 that is not fixed to the housing 10 ( 142 contacts the second fixing unit 42 to fix the hub block 40. In this state, when the master block 30 proceeds to be close to the hub block 40 by the user's firing operation, the release unit 32 of the master block 30 is coupled to the second fixed unit 42, thereby Accordingly, the other end 142 of the second support unit 14 is pressed, and eventually the support of the other end 142 for the second fixing unit 42 is released. In this case, the master block 30 and the hub block 40 are coupled to each other by the spring 50 and proceed in the first direction D1 at the same time.

The hub block 40 may further include an extension unit 45 extending in the second direction D2. The extension unit 45 may block the first opening 110 in at least one state, for example, in an unloaded state, so that the hollow part 11 is kept sealed. By maintaining a substantially sealed shape inside the hollow part 11, the volume of the space created by the master block 30 changes according to the retreat movement of the master block 30 when firing, that is, movement in the second direction D2 Occurs, accordingly, the space formed between the outer needle 21 and the inner needle 20 and the inside of the tissue collecting groove 202 may perform a function of forming a negative pressure. Due to this negative pressure, the tissue may be better seated in the tissue collecting groove 202, and accordingly, it is possible to prevent the tissue from being pushed when cutting the tissue and to cut the tissue more effectively.

According to an embodiment, the spring 50 may be positioned in the hollow part 11 so as to be aligned inline with the master block 30 and the hub block 40 along an axial direction D.

The spring 50 may include a first portion 501 and a second portion 502 as can be seen in FIGS. 8 and 9. The first part 501 protruding to one side of the hub block 40 is fixedly coupled to the master block 30, and the second part 502 protruding to the other side of the hub block 40 is the housing Combined with (10).

In a loaded state, that is, in a state where the master block 30 and the hub block 40 are sufficiently separated, the first part 501 is in a second direction parallel to the axial direction D with respect to the master block 30 ( D2) may provide a first elastic force, and the second portion 60 may provide a second elastic force with respect to the hub block 40 in a first direction D1 parallel to the axial direction D. I can.

The first portion 501 and the second portion 502 may be provided to have different spring pitches, and the spring pitch of the first portion 501 may be smaller than the spring pitch of the second portion 502. I can. The first portion 501 and the second portion 502 have different spring pitches, but each portion may be provided to have a uniform spring pitch. According to an embodiment, the first portion 501 may have a tensile pitch relative to the second portion 502, and the second portion 502 may have a compression pitch relatively higher than the first portion 501. It can be something to have. According to another embodiment, the first portion 501 may be wound to be a tension spring, and the second portion 502 may be wound to be a compression spring.

According to this embodiment, when only the hub block 40 is moved in the second direction D2 and then fixed in a loaded state, that is, in a state in which the master block 30 is fixed, the first part 501 and the second part All 502 are in a state of having an elastic force in the first direction D1 with respect to the hub block 40. Thereafter, when the fixing in the hollow portion 11 of the master block 30 is released by the operation of the firing unit 180, the hub block 40 is still fixed in the hollow portion 11, so the first The master block 30 moves in the second direction D2 by the restoring force of the portion 501. Thereafter, when the fixing of the hub block 40 is released as the master block 30 contacts the hub block 40, the master block 30 and the hub block 40 are formed by the restoring force of the second part 502. At the same time, it moves in the first direction D1. In this way, according to the movement of the master block 30 in the second direction D2 and the movement in the first direction D1, the outer needle 21 coupled to the master block 30 simultaneously moves in the second direction D2 and The first direction D1 is sequentially moved, and accordingly, the tissue may be collected in the tissue collecting groove 202.

Meanwhile, the first portion 501 and the second portion 502 may have different diameters. According to an embodiment, the first portion 501 having a tensile pitch may be provided to have a smaller radius than the second portion 502 having a compressed pitch.

This spring 50 may be installed to pass through the through hole 400 of the hub block 40 as shown in FIG. 9.

The through hole 400 may include a first through hole 401 through which the first part 501 of the spring 50 passes and a second through hole 402 through which the second part 502 passes. . The first through hole 401 and the second through hole 402 may be connected to each other.

According to an embodiment, the first through hole 401 may be formed with a first diameter d1 to correspond to the diameter of the first part 501, and the second through hole 402 may be a second part ( It may be formed with a second diameter (d2) to correspond to the diameter of 502. The first diameter d1 may be smaller than the second diameter d2. Accordingly, when the spring 50 is inserted into the through hole 400, the first part 501 may be inserted from the second through hole 402.

A fixed end 403 may be positioned between the first through hole 401 and the second through hole 402. The first part 501 and the second part 502 are located at the position of the fixed end 403, and the spring 50 at the fixed end 403 may be fixed to the hub block 40. .

The fixed end 403 may be formed in a stepped structure according to a difference in diameter between the first through hole 401 and the second through hole 402. As described above, due to the difference in diameter between the first portion 501 and the second portion 502, the end of the second portion 502 may be in close contact with the fixed end 403.

The hub block 40 moves in the second direction D2 by the loading operation, and the fixed end 403 pushes the end of the second part 502 in the second direction D2 to the second part 502 Is compressed. At this time, since the end of the second portion 502 is in close contact with the fixed end 403, the spring 50 may be fixed within the hub block 50.

Even during the user's firing operation, since the end of the second part 502 pushes the fixed end 403 by the restoring force of the second part 502, the hub block 40 can move in the first direction D1. .

As such, the spring 50 may be fixedly coupled to the hub block 40 without a separate fixing mechanism. However, the present invention is not necessarily limited thereto, and a separate pin (not shown) from the outside of the fixed end 403 is inserted into the hub block 40 so that the first part 501 and the second part 502 of the spring 50 The spring 50 may be fixed within the hub block 40 by being fitted between the ).

Meanwhile, referring to FIG. 1, an open confirmation window 122 is formed in one area of the housing 10, and a marking is formed in an area corresponding to the confirmation window 122 of the outer surface of the hub block 40. Thus, it is possible to check whether the user is in the loaded state by checking this marking with the confirmation window 122.

10 shows an operation flow of the cutting biopsy device according to an embodiment of the present invention having the above-described structure.

Step S1 is ready. At this time, the first handle 51 is in a state in which the hole 515 is hung in the locking unit 161, and the other end 522 of the connector 52 is in a state in which the fourth support unit 443 is not supported. I can. At this time, since the first handle 51 has a predetermined elastic force in the direction in which the lock is released, the user opens the end exposed outside the hole 515 of the locking unit 161 in the unlocking direction (for example, The first handle 51 can be unlocked by simply touching lightly in one direction D1). When the lock is released in this way, the rotation angle of the first handle 51 is intercepted by the first stopper 171 and/or the second stopper 516, so that the first handle 51 is automatically in a state just before the loading proceeds. It can be (S2). And at this position, the other end 522 of the connector 52 can be automatically moved to a position supporting the fourth support unit 443.

In step S2, the first handle 51 is spaced apart from the housing 10 and the other end 522 of the connector 52 supports the fourth support unit 443 as a state immediately before loading.

Step S3 is a loaded state, as the user applies a pressing force to the first handle 51, the connector 52 applies a force in the second direction D2 to the fourth support unit 443 according to the hinge movement mechanism The block 40 is moved in the second direction D2 by a preset distance a to complete the loading. At this time, the second fixing unit 42 of the hub block 40 is fixed to the second support unit 14 so that the position of the hub block 40 may be fixed.

Since this reloading operation is performed by the user holding the cutting biopsy device with one hand and pressing the first handle 51 in the direction of the housing 10, the user can still maintain the degree of freedom of the other hand. The loading operation can be completed simply by loading only with the force of pressing the first handle 51.

At this time, since the movement of the master block 30 is suppressed by the first support unit 13, the spring 50 is separated from the master block 30 and the hub block 40 by a predetermined distance (a). The first part 501 of the is stretched, and accordingly, an elastic force is generated in the first part 501. At this time, the second part 502 is in a compressed state and has elasticity.

In any one of the steps S1 to S3, the user may simultaneously insert the outer needle 21 and the inner needle 20 of the cut biopsy device into the patient's tissue and prepare for firing.

Thereafter, when the pressing force P is applied to the firing unit 180, the first firing stage S4 proceeds. That is, when the pressing force P is applied to the launch unit 180, the second launch unit 182 presses the first fixing unit 31, and accordingly, the first support unit 13 of the first fixing unit 31 ) Can be released. Accordingly, the master block 30 is moved in the second direction (D2) by a preset distance (b) by the restoring force of the first part 501 of the spring 50, and at the same time, the outer surface fixed to the master block 30 (21) The tissue collection groove 202 is exposed by moving in the second direction D2 by a distance b. At this time, the tissue to be collected may be pushed into the tissue collection groove 202 and seated.

When step S4 is completed, the second firing stage S5 proceeds. That is, as the master block 30 moves in the second direction D2, the release unit 32 of the master block 30 is coupled to the second fixing unit 42, and accordingly, the release unit 32 The other end 142 of the second support unit 14 is pressed, and eventually the support of the other end 142 to the second fixing unit 42 is released. In this case, the master block 30 and the hub block 40 proceed in the first direction D1 by the second part 502 of the spring 50, and at the same time, the outer shell fixed to the master block 30 ( 21) As it proceeds in the first direction (D1), the tissue collection groove 202 is covered, and the upper portion of the tissue seated in the tissue collection groove 202 is cut and the cut tissue is sealed in the tissue collection groove 202 Make it possible (S5).

Each of the preset distances a, b, and c described above is preferably the same in the present invention, but it can be understood that a, b, and c may be set differently due to some errors in performing the functions of the invention. have.

Thereafter, the above-described tissue recovery stage S6 may proceed. That is, the user presses the second handle 331 of the connection bar 33 to release the fixation by the third support unit 303, and moves the second handle 331 in the second direction D2 to move the connection bar ( The outer needle 21 fixed to 33) can be moved in the second direction D2. Accordingly, the tissue collection groove 202 of the fast needle 20 is exposed so that the collected tissue can be recovered.

11 is a perspective view schematically illustrating a hub block according to a modified example of the present invention.

Referring to FIG. 11, the hub block 40 of the present modified example includes an extension unit 45, and the extension unit 45 may correspond to a lower end of the body of the hub block 40.

Referring to FIG. 11, as compared with FIG. 7 described above, the hub block 40 may have an extended area formed on one area or side of the extension unit 45 to accommodate the one area of the connector 52.

In the present invention, since the collected tissue can be recovered by a simple operation, the user can recover the tissue only with the hand holding the cut biopsy instrument, and thus the degree of freedom of the other hand can still be maintained. Therefore, the user can proceed to the next tissue collection operation immediately, thereby facilitating the collection of a plurality of consecutive tissues.

As described above, in the present invention, the above-described loading, firing, and retrieval operations can be performed only with the hand holding the cutting biopsy device while the ultrasonic device is still positioned at the target position with one hand, so that the entire procedure can be very simple.

As described above, although the embodiments have been described by the limited embodiments and drawings, various modifications and variations are possible from the above description by 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 an axial direction and having a hollow portion extending in the axial direction and at least one opening communicating with the hollow portion therein;
A needle set including an inner needle having a tissue collecting groove at one end and an outer needle provided in a pipe shape to accommodate the inner needle, and a part of a needle disposed in the hollow portion;
A master block connected to one end of the outer needle, provided to pass through the inner needle, and located in the hollow portion to enable movement in the axial direction;
A hub block provided to pass through the inner needle and positioned in the hollow portion so as to be movable in the axial direction;
A spring coupled to the hub block so as to penetrate the hub block, a first portion protruding toward one side of the hub block coupled to the master block, and a second portion protruding toward the other side of the hub block coupled to the housing;
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
Including; at least a launch unit provided to selectively release the coupling of the first support unit and the master block; and
The hub block is provided so as not to be coupled with the needle set,
The inner needle is fixed so as not to move in the axial direction within the housing,
The first support unit is provided to provide resistance to a first elastic force with respect to the master block when loaded by the loading unit,
The second support unit is a cutting biopsy device provided to provide resistance to a second elastic force with respect to the hub block after completion of the loading by the loading unit. The method of claim 1,
The first part and the second part have different spring pitches. The method of claim 1,
In the loading position,
The first part is provided to apply a first elastic force to the master block, and the second part is provided to apply a second elastic force in a direction different from the first elastic force to the hub block. The method of claim 1,
The first part and the second part are cut biopsy instruments provided to have different diameters. The method of claim 4,
The hub block
A first through hole through which the first part passes, and a second through hole through which the second part passes,
A cutting biopsy device further comprising a fixed end positioned between the first through hole and the second through hole.

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