KR20190115784A - Core biopsy device - Google Patents

Abstract

The present invention relates to a cutting biopsy instrument capable of easily performing loading by minimizing a change in a holding shape. By suggesting a novel movement relation between an inner needle and an outer needle at liftoff, the cutting biopsy instrument improves accuracy for collecting tissue, can increase safety in collection and can simply recover the collected tissue.

Description

Cutting biopsy device {Core biopsy device}

One embodiment of the invention relates to a cleavage biopsy instrument.

In general, for the examination of biological tissues, a method of injecting an apparatus capable of sampling biological tissues into biological tissues and collecting tissues to be sampled from among biological tissues is used. This type includes aspiration biopsy and excisional biopsy.

Recently, cutting biopsies can be obtained by cutting a tissue by the shape of a needle to obtain histological form intact and to increase diagnostic accuracy. In the case of a cleaved biopsy, while minimizing the diameter of the needle inserted into the affected part, minimizing repetitive invasive behavior, and allowing precise procedures for a small sample, it is being used more recently than aspiration biopsy.

The cutting biopsy type specimen apparatus described in Korean Patent Nos. 10-1463867 and 10-1551311, etc., has a dense coat tissue or a hard material during the advancement of the inner ear by firing the inner ear in the cutting mechanism and the outer outer ear. It may be unable to penetrate or bend the travertine tissue, etc. This may cause the nodules to be pushed backward or the inner ear can not reach the exact tissue area to be collected, it has been pointed out that the procedure is very difficult.

On the other hand, the technology for improving accuracy, such as using an ultrasonic guide equipment to accurately reach the needle set to the above-described tissue to be collected has been developed a lot. However, in the prior art, the operator generally changes the shape of holding the biopsy device or is loaded with both hands. Therefore, there is a possibility that the targeting of the ultrasonic guide may be disturbed, especially when multiple repetitions are required.

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, to provide a cutting biopsy mechanism that can be easily carried out by minimizing the change of the gripping form with only one hand holding the cutting biopsy device There is a purpose.

Another object of the present invention is to provide a cutting biopsy mechanism capable of newly presenting a relationship of movement between firing the needle and the outer shell to further improve the accuracy of tissue collection and further increase the safety at the time of collection.

In addition, another object of the present invention is to provide a cutting biopsy device that can easily recover the tissue collected by the biopsy device.

In addition, another object of the present invention is to provide a cutting biopsy mechanism that can significantly reduce the number of components to further reduce the cost of production.

In order to achieve the above object, the cutting biopsy device according to an embodiment of the present invention, in order to achieve the above object, the cutting biopsy device according to an embodiment of the present invention, extending in the axial direction, 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 thereof, and an outer shell provided on the pipe to accommodate the inner needle; A needle set positioned in the hollow portion, connected to one end of the outer shell, provided with a penetrating needle, a master block positioned in the hollow portion so as to be movable in the axial direction, and provided with a penetrating needle A hub block positioned in the hollow portion to enable movement in the axial direction, coupled to the hub block to penetrate the hub block, and the hub A first support protruding to one side of the lock is coupled to the master block, and a second support protruding to the other side of the hub block is coupled to the housing and a first support selectively coupled to the master block at least at the loading position. A unit, a second support unit selectively coupled to the hub block at least in the loading position, a loading unit for moving the hub block to the loading position, and at least a combination of at least the first support unit and the master block It may include a firing unit provided to release.

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

In the loading position, the first portion is provided to apply a first elastic force with respect to the master block, the second portion is provided to apply a second elastic force in a direction different from the first elastic force with respect to the hub block. Can be.

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 part passes, and a second through hole through which the second part passes, and includes a fixed end positioned between the first through hole and the second through hole. It may further include.

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 such a way as to apply a holding force in a gripped state, and is pushed back through the loading state so that a restoring force is applied to the first and second springs. After the inner and outer skins enter the body together, the outer skin has a reciprocating structure that retracts and advances from the lower acupuncture. It is easy to perform, and it is effective to provide a biopsy apparatus having a loading and firing structure that can easily change the loading form for a small amount or a large amount of collection. It may not penetrate or bend, which may cause the nodules to be pushed backwards or the exact tissue to be harvested. There is sokchim the station can not be reached, you can solve the problem that the procedure is very difficult.

On the other hand, when using the ultrasonic guide, the user can carry out the loading and firing with only one hand while holding the ultrasonic guide, the targeting is maintained accurately has the effect of increasing the accuracy of the procedure.

On the other hand, by moving the outer connecting bar after collecting the tissue by the coupling structure of the outer connecting bar of the master block to which the outer surface is fixed, it is possible to easily recover the tissue existing in the tissue collecting groove of the sediment without any other manipulation. Simple sample recovery is possible.

On the other hand, it is possible to further implement the additional function by increasing the length of the moving direction of the master block to be moved in close contact with the hollow portion of the housing, there is an effect that enables a precise procedure by performing a stable sliding operation.

According to the cutting biopsy apparatus according to the embodiments of the present invention, the loading can be easily performed by minimizing the change of the phage form with only one hand holding the cutting biopsy mechanism.

In addition, the present invention newly suggests a moving relationship between firing the needle and the outer shell to further improve the accuracy of tissue collection and further increase the safety at the time of collection.

In addition, the present invention can easily recover the collected tissue, and can be performed only by the hand holding the device, it is possible to increase the freedom of the other hand.

In addition, the rotation angle of the first handle can be briefly interrupted, thereby making it easy to load with one hand.

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

As soon as the first handle is unlocked, the connector can be immediately placed in the loadable state so that the loading can be performed immediately.

Significantly reduce the number of components, resulting in lower production costs.

1 illustrates a cut biopsy instrument according to one embodiment.
2 is a partial cross-sectional view of the cutting biopsy instrument of FIG. 1.
3 is a cross-sectional view of a housing of a cutting biopsy instrument in accordance with one embodiment.
4 is a diagram for explaining a structure of a needle set according to one embodiment;
5 illustrates a cut biopsy instrument according to one embodiment.
6 is an exploded view showing a master block of the cutting biopsy instrument according to one embodiment.
7 illustrates a hub block of a cutting biopsy instrument in accordance with one embodiment.
8 illustrates an arrangement of a spring, a master block, and a hub block according to one embodiment.
9 is a cross-sectional view showing a coupling state of the spring and the hub block according to an embodiment.
10 is a view for explaining the operation step of the cutting biopsy instrument according to one embodiment.
11 is a perspective view for 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, numerous specific details are set forth in order to provide a thorough understanding of one or more aspects. However, it will also be appreciated by one 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 the 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.

Moreover, various aspects and features will be presented by a system that may include a number of devices, components, and / or modules, and the like. The various systems may include additional devices, components, and / or modules, etc., and / or may not include all of the devices, components, modules, etc. discussed in connection with the drawings. It must be understood and recognized.

As used herein, “an embodiment”, “an example”, “aspect”, “an example”, etc., may not be construed as having any aspect or design described being better or advantageous than other aspects or designs. . In addition, the terms "comprises" and / or "comprising" mean that such features and / or components are present, but exclude the presence or addition of one or more other features, components, and / or groups thereof. It should be understood that it does not.

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

In addition, in the embodiments of the present invention, unless otherwise defined, all terms used herein including technical or scientific terms are generally understood by those skilled in the art to which the present invention belongs. Has the same meaning as Terms such as those defined in the commonly used dictionaries should be interpreted as having meanings consistent with the meanings in the context of the related art, and ideally or excessively formal meanings, unless explicitly defined in the embodiments of the present invention. Not interpreted as

Meanwhile, in the following description, the matters described in the drawings are partially omitted or excessively enlarged or reduced in order to explain the functions of the elements of the present invention, but the corresponding matters are technical features and rights of the present invention. It will be understood that the present invention is not intended to limit the scope.

In addition, in the following description, in order to explain the components constituting one technical feature or invention, a plurality of drawings will be described with reference to the same.

1 is a side view of a cut biopsy instrument according to one 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, and a loading unit ( 500 and launch unit 180.

As shown 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 enclosed space except that the needle set 200 to be described later penetrates. The housing 10 has a first opening 110 in communication with the hollow portion 11, through which the hub block 40 and the loading unit 500 can be connected as described below. Can be.

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

The partition wall 102 is provided adjacent to the hole 12, and the hollow part 11 is divided by the partition wall 102 to have the partition 103. A hole aligned with the hole 12 is formed in the partition wall 102 so that the needle set 200 passes through the partition wall 102.

The 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 may be formed at a position opposite to the first opening 110 and may communicate with the hollow part 11. .

The firing unit 180 may be located in the housing 10, which 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 firing unit 182 may have elasticity in a direction substantially perpendicular to the axial direction D, that is, a 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 extends from the end of the first firing unit 182 toward the second opening 111, and selectively opens the second opening 111 as the user presses the firing unit 180. It may be provided to face.

The launch unit 180 may be integrally formed with the housing 10. In particular, the first firing unit 182 may be formed so that one end is connected to the housing 10. By forming the launch unit 180 integrally with the housing 10 as described above, 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 productivity. Can be.

One end of the housing 10 has a hinge axis 17 adjacent to the hole 12, the hinge axis 17 being located on the opposite side of the firing unit 180 about the hollow part 11. can do. The first handle 51 of the loading unit 500, which will be described later, may be hinged to the hinge shaft 17. According to the embodiments shown in the drawings, the hinge axis 17 is located at the end of the first direction D1 of the housing 10, but the present invention is not necessarily limited thereto, and the hinge axis 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, which will be described later, may be positioned at an end portion of the housing 10 in the first direction D1.

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

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

The support block 15 is provided to communicate with the hole 12, and the support guide 151 may extend further to 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 arranged coaxially with the hole 12, thereby communicating with the hole 12.

A needle set 200 to be described later may be installed to penetrate the support block 15. Therefore, at least the support guide 151 of the support block 15 may allow the inner diameter to have a size corresponding to the outer diameter of the needle set 200. The support block 15 may minimize the shaking of the needle set 200 during the procedure, thereby helping to accurately collect the target site. In addition, according to the target tissue and the procedure, the needle set 200 having various sizes is used. The embodiment of the present invention supports the support block 15 to correspond to the size of the needle set 200, in particular, a support guide. By forming the inner diameter of the 151 to correspond to the outer diameter of the needle set 200, it is possible to change the support block 15 when changing the needle set has the advantage that the needle set 200 of various sizes can be used as a single mechanism In addition, the setting of the needle set 200 can be simplified.

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

The loading unit 500 may include a first handle 51 and a connector 52. One end of the first handle 51 may be hinged to the hinge shaft 17 of the housing 10, and the other end 512 may be open. The first handle 51 may include a second stopper 516 positioned adjacent to the first stopper 171. The second stopper 516 is in contact with the first stopper 171 in a state where the first handle 51 is rotated at the maximum angle about the hinge axis 17 so that the first handle 51 is connected to the hinge axis 17. It is possible to stop the rotation around the center. Although one embodiment has been shown to include both the first stopper 171 and the second stopper 516, the present invention is not necessarily limited thereto, and the first stopper 171 and the second stopper 516 are not limited thereto. It may be sufficient to include at least one.

The connector 52 may be provided such that one end 521 is hinged rotatably near 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, thereby allowing the other end 522 of the connector 52 to receive an elastic force in the first direction D1. have. The first handle 51 may include a groove 514 formed at a position where the connector 52 rotates and overlaps with the first handle 51, whereby the first handle 51 may include the housing 10. Since the connector 52 is located in the groove 514 in a state of being rotated adjacent to the connector 52, the connector 52 may not interfere with the movement of the first handle 51.

The locking unit 161 may be located at the other end of the housing 10, that is, at an end opposite to the hinge shaft 17. The locking unit 161 extends in a direction perpendicular to the axial direction D. Referring to FIG. 2, the locking unit 161 is formed in a hook shape, so that the locking unit 161 is formed in the hole 515 of the other end 512 of the first handle 51. It is equipped to take. The locking unit 161 may be provided to have elasticity in a direction perpendicular to the longitudinal direction, and as a result, the locking unit 161 may be released from the first handle 51 by a simple operation of a user as described below. The locking unit 161 is not necessarily coupled to the housing 10, but 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.

On the other hand, as shown in FIG. 5, the first handle 51 may be provided to have a predetermined curvature R in its length direction in a state in which it is coupled to the housing 10 by the locking unit 161. The first handle 51 may be formed of a metal and / or a synthetic resin material, and may have a predetermined elasticity by the characteristics of the material. Since the first handle 51 is pressed by the locking unit 161 to the housing 10, the middle portion of the longitudinal direction is pressed against the protrusion 101 of the housing 10, and thus, the first handle 51 in this state. The 51 may have an elastic force in a direction substantially perpendicular to the longitudinal direction thereof, for example, in a direction opposite to the locking unit 161. Thus, when the first handle 51 has an elastic force in a direction perpendicular to the longitudinal direction, the first handle 51 has a potential in the direction of releasing the engagement by the locking unit 161, and thus the user has a hook shape. By lightly touching the locking unit 161, the engagement of the locking unit 161 of the first handle 51 can be released. This may further improve the handling of the user's 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 at the loading position to provide the master block 30 with resistance to the elastic force of the spring 50. According to an embodiment, the first support unit 13 may be an end portion of the second opening D2 of the second opening 111 formed in the housing 10. The above-described second firing unit 183 is located adjacent to the first supporting unit 13, and presses a part of the master block 30 which is caught by the first supporting unit 13 when firing the first supporting unit. The engagement of the master block 30 with respect to 13 can be released.

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

Meanwhile, as shown in FIG. 1, the housing 10 may further include a third opening 121. The third opening 121 may be formed at one side of the housing 10. For example, as shown in FIG. 1, the third opening 121 may be formed at the side of the housing 10 adjacent to the firing unit 180. As described below, the second handle 331 is exposed to the outside of the housing 10 through the third opening 121, and the user may manipulate the second handle 331.

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

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

The outer shell 21 is provided on the 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 surface 21 has a blade 212 formed at one end to cut the tissue accommodated in the tissue collection groove 202, it may be provided to reciprocate relative to the inner needle 20. The blade 212 may be provided at an inclination in a direction different from that of the end of the needle 20, but is not necessarily limited thereto and may be provided to have an inclination in the same direction as the end of the needle 20.

The needle set 200 protrudes outward through the front end hole 12 of the housing 10 through the housing 10. Therefore, a part of the needle set 200 is located in the hollow portion 11.

Although not shown, according to an embodiment, a predetermined space may be formed between the outer shell 21 and the inner needle 20, and the space may be connected to the tissue collection groove 202. A hole 211 may be formed at the other end of the outer shell 21, and the hole 211 may be formed in a direction perpendicular to the axial direction D, and may communicate 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 cover 21.

At least the outer surface 21 of the needle set 200 may be fixedly coupled to the master block 30 to move in conjunction with the movement of the master block 30. The master block 30 is located in the hollow part 11. And the needle 20 may be installed to penetrate the master block 30, it 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 to be coupled to the connecting bar 33 to be described later, an opening 305 is formed on one side through which the second handle 331 of the connecting bar 33 is exposed. You can do that. The base 301 may include a third support unit 303 positioned adjacent 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 thus may be provided to selectively block the movement of the connection bar 33. Can be. However, the present invention is not limited thereto, and may have a protrusion shape protruding toward the space 304. For example, any shape may be applied as long as it selectively blocks the movement of the connection bar 33.

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

The connection bar 33 is embedded in the master block 30, which may be mounted in the master block 30, and provided to move along the longitudinal direction of the master block 30. The other part of the connection bar 33 except for the part connected to the outer cover 21 may include an elastic part 335 having a predetermined elasticity in a direction perpendicular to the longitudinal direction of the master block 30. The second handle 331 may be positioned to be exposed to the outside of the master block 30 adjacent to one end 336 of the elastic part 335. The second handle 331 is exposed to the outside of the master block 30 through the above-described opening 305, which refers to FIG. 1 through the third opening 121 formed in the housing 10. ) May be exposed to the outside. The elastic part 335 of the connection bar 33 may be selectively fixed in position by the aforementioned third support unit 303. That is, while the connection bar 33 is positioned at one end of the master block 30, the end 336 of the elastic part 335 may be held in the third support unit 303 described above. When the elastic part 335 is bent in a direction perpendicular to the longitudinal direction of the master block 30 by external pressure, the locked state of the end portion 336 and the third support unit 303 may be released.

When the user manipulates the second handle 331, first, the user presses the second handle 331 in a direction perpendicular to the longitudinal 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 cover 21 coupled to the connection bar 33 may move in the same manner, and as shown in FIG. 4, the tissue collecting groove 202 of the inner ear 20 is moved. Can be exposed outward.

The fixing block 337 provided to penetrate the needle 20 may be further 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, the surface of the cover 302 has a first fixing unit 31 provided to be able to elastically move in a direction perpendicular to the longitudinal direction of the master block 30 It may be provided. The first fixing unit 31 is provided to protrude from the surface of the cover 302, and can move with elasticity in the direction opposite to the protruding direction. In the loaded state, this first fixed 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 firing unit 182 of the firing unit 180 described above is to press the first fixing unit 31 by the user's operation, so that the first support unit 13 of the first fixing unit 31 The lock on 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. According to an embodiment, the release unit 32 may be provided to extend in the second direction D2 toward the hub block 40. 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, and the needle 20 is provided to penetrate, and is aligned in-line along the master block 30 and the axial direction D. It may be arranged to. 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 embodiment. The spring 50 has a first portion 501 and the second portion 502 is formed integrally, penetrating through the hub block 40, the first portion 501 and the second portion 502 is a hub block 40 may be fixed to the hub block 40 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 embodiment of 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 may be provided to support the other end 522 of the connector 52. Therefore, as the user grasps the first handle 51 and pushes in the direction of the housing 10 with one hand, the hub block 40 is supported in the second direction while the connector 52 is supported by the fourth support unit 443. It moves to (D2).

The hub block 40 may include a second fixing unit 42. The second fixing unit 42 may be a stepped portion formed in the hub block 40 in a direction perpendicular to the axial direction D. FIG. By the second fixing unit 42, 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. According to one 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. At the time of loading, when the hub block 40 proceeds in the second direction D2, 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 touches the second fixing unit 42 to fix the hub block 40. In this state, when the master block 30 proceeds to approach the hub block 40 by the user's launching operation, the release unit 32 of the master block 30 is coupled to the second fixing unit 42. Accordingly, the other end 142 of the second support unit 14 is pressed, and as a result, the support of the second fixing unit 42 of the other end 142 is released. In this case, in the state in which the master block 30 and the hub block 40 are coupled to each other by the spring 50, the master block 30 and the hub block 40 progress simultaneously in the first direction D1.

The hub block 40 may further include an extension unit 45 extending in the second direction D2. The extension unit 45 may maintain the state in which the hollow part 11 is sealed by blocking the first opening 110 in at least one state, for example, in an unloaded state. Since the inside of the hollow part 11 maintains a substantially closed shape, the volume change of the space generated by the master block 30 according to the retreat movement of the master block 30, that is, the movement in the second direction D2 at the time of launching. In this case, the space formed between the outer shell 21 and the inner ear 20 and the inside of the tissue collecting groove 202 may perform a function of forming a negative pressure. The negative pressure allows the tissue to be better seated in the tissue collecting groove 202, thereby preventing the tissue from being pushed when cutting the tissue and cutting the tissue more effectively.

According to one embodiment, the spring 50 may be located in the hollow portion 11 to be aligned inline with the master block 30 and the hub block 40 along the axial direction (D).

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

In the loaded state, that is, the master block 30 and the hub block 40 are sufficiently spaced apart, the first portion 501 has 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 in the first direction D1 parallel to the axial direction D with respect to the hub block 40. Can be.

The first portion 501 and the second portion 502 may be provided to have a different spring pitch, the spring pitch of the first portion 501 is less than the spring pitch of the second portion 502 Can be. The first part 501 and the second part 502 have different spring pitches, but each part may be provided to have a uniform spring pitch. According to one embodiment, the first portion 501 may have a tensile pitch relatively than the second portion 502, and the second portion 502 may have a compression pitch relatively greater than that of the first portion 501. It may be 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, the first portion 501 and the second portion in a state of being loaded, that is, in a state in which only the hub block 40 is moved in the second direction D2 while the master block 30 is fixed and then fixed, 502 is in a state having all the elastic force in the first direction D1 with respect to the hub block 40. After the fixing of the inside of the hollow portion 11 of the master block 30 by the operation of the firing unit 180, the hub block 40 is still fixed in the hollow portion 11, the first The master block 30 moves in the second direction D2 by the restoring force of the portion 501. Thereafter, when the master block 30 releases the hub block 40 in contact with the hub block 40, the master block 30 and the hub block 40 by the restoring force of the second part 502. At the same time, it moves in the first direction D1. As described above, the outer cover 21 coupled to the master block 30 is simultaneously moved in the second direction D2 and the second block D2 in the second direction D2 and the first direction D1. In order to sequentially move in the first direction D1, tissue may be collected in the tissue collection groove 202.

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

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

The through hole 400 may include a first through hole 401 through which the first portion 501 of the spring 50 passes and a second through hole 402 through which the second portion 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 to have a first diameter d1 to correspond to the diameter of the first part 501, and the second through hole 402 may include a second part ( The second diameter d2 may be formed to correspond to the diameter of 502. The first diameter d1 may be smaller than the second diameter d2. Therefore, when the spring 50 is inserted into the through hole 400, the first portion 501 may be inserted from the second through hole 402.

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

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

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. This is compressed. At this time, since the end portion of the second portion 502 is in close contact with the fixed end 403, the spring 50 may be fixed in the hub block 50.

Since the end portion of the second portion 502 pushes the fixed end 403 by the restoring force of the second portion 502 even during the user's launching operation, the hub block 40 may 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) is inserted into the hub block 40 from the outside of the fixed end 403, so that the first part 501 and the second part 502 of the spring 50 are inserted. The spring 50 can be fixed in the hub block 40 by being sandwiched between.

Meanwhile, referring to FIG. 1, an open confirmation window 122 is formed in one region of the housing 10, and a marking is formed in an area corresponding to the confirmation window 122 among the outer surfaces of the hub block 40. Therefore, the user can confirm whether or not the loading state by confirming this marking with the confirmation window 122.

10 shows the operational flow of a cutting biopsy instrument in accordance with one 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 locked to the locking unit 161, and the other end 522 of the connector 52 is in a state of not supporting the fourth support unit 443. Can be. At this time, since the first handle 51 is in a state in which the first handle 51 has a predetermined elastic force in the direction in which the lock is released, the end of the first exposed portion exposed to the outside of the hole 515 of the locking unit 161 is released in the unlocking direction (eg, The first handle 51 can be unlocked only by lightly touching in one direction D1). When the lock is released in this manner, since the rotation angle of the first handle 51 is interrupted by the first stopper 171 and / or the second stopper 516, the first handle 51 is in a state immediately before the loading progression. (S2). In this position, the other end 522 of the connector 52 can automatically move to a position supporting the fourth support unit 443.

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

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

This loading operation is performed by the user holding the cutting biopsy instrument with one hand and pressing the first handle 51 in the direction of the housing 10 so that the user can still maintain the freedom of the other hand, The loading operation can be simply completed by loading with only the force for pushing 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 spaced apart from the master block 30 and the hub block 40 by the predetermined distance a. The first portion 501 of the tension is tensioned, thereby generating an elastic force in the first portion 501. At this time, the second portion 502 is in a compressed state to have elastic force.

In any of the steps S1 to S3, the user may simultaneously insert the outer skin 21 and the inner ear 20 of the cutting biopsy instrument into the patient's tissue and prepare for firing.

Then, when the pressing force P is applied to the firing unit 180, the first firing stage S4 proceeds. That is, when a pressing force P is applied to the firing unit 180, the second firing unit 182 presses the first fixing unit 31, and thus, the first supporting unit 13 of the first fixing unit 31. ) Can be released. Accordingly, the master block 30 is moved in the second direction D2 by the predetermined distance b by the restoring force of the first portion 501 of the spring 50, and is simultaneously fixed to the master block 30. 21 also moves in the second direction D2 by the distance b to expose the tissue collecting groove 202. At this time, the tissue to be collected into the tissue collecting groove 202 may be pushed and seated.

When the step S4 is completed, the second firing stage S5 proceeds. That is, as the master block 30 is moved in the second direction D2, the release unit 32 of the master block 30 is coupled to the second fixing unit 42, whereby the release unit 32 The other end 142 of the second support unit 14 is pressed, and as a result, the support of the second fixing unit 42 of the other end 142 is released. In this case, the master block 30 and the hub block 40 advance in the first direction D1 by the second portion 502 of the spring 50, and at the same time, the outer surface fixed to the master block 30 ( 21 also covers the tissue collecting groove 202 while proceeding in the first direction D1 to cut the upper part of the tissue seated in the tissue collecting groove 202 so that the cut tissue is sealed in the tissue collecting groove 202. (S5).

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

Thereafter, the tissue recovery stage S6 described above may proceed. That is, the user presses the second handle 331 of the connection bar 33 to release the fixing by the third support unit 303 and moves the second handle 331 in the second direction D2 to connect the connection bar ( The outer cover 21 fixed to 33 can be moved in the second direction D2. Accordingly, the tissue harvesting groove 202 of the spit 20 can be exposed to recover the collected tissue.

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

Referring to FIG. 11, the hub block 40 of the present modification may include an extension unit 45, and the extension unit 45 may correspond to the lower end of the body of the hub block 40.

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

Since the present invention enables the recovery of tissue collected by a simple operation, the user can recover the tissue with only the hand holding the cut biopsy tool, thereby still maintaining the freedom of the other hand. Therefore, the user may proceed to the next tissue collection operation, thereby facilitating a plurality of continuous tissue collection.

As described above, the present invention can perform the above-mentioned loading, firing, and retrieval operations 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 operation can be made very simple.

Although the embodiments have been described by the limited embodiments and the drawings as described above, various modifications and variations are possible to those skilled in the art from the above description. For example, the described techniques may be performed in a different order than the described method, and / or components of the described systems, structures, devices, circuits, etc. may be combined or combined in a different form than the described method, or other components. Or even if replaced or substituted by equivalents, an appropriate result can be achieved. Therefore, other implementations, other embodiments, and equivalents to the claims are within the scope of the claims that follow.

Claims (5)

A housing extending in the axial direction and having a hollow portion extending in the axial direction and at least one opening in communication with the hollow portion;
A needle set including a needle having a tissue collecting groove at one end thereof, and an outer needle provided on a pipe to accommodate the needle, and a portion of which is located at the hollow part;
A master block connected to one end of the outer shell, provided with the inner needle to penetrate, and positioned in the hollow portion to be movable in the axial direction;
A hub block provided to penetrate the needle, and positioned in the hollow part to be movable in the axial direction;
A spring coupled to the hub block to penetrate the hub block, a first portion protruding to one side of the hub block coupled to the master block, and a second portion protruding to the other side of the hub block coupled to the housing;
A first support unit selectively coupled to the master block in at least a loading position;
A second support unit selectively coupled to the hub block in at least a loading position;
A loading unit for moving the hub block to the loading position; And
And a firing unit adapted to selectively release engagement of at least the first support unit and the master block. The method of claim 1,
And the first portion and the second portion have different spring pitches. The method of claim 1,
In the loading position,
And the first portion is provided to apply a first elastic force to the master block, and the second portion 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,
And the first portion and the second portion have a different diameter. The method of claim 4, wherein
The hub block
A first through hole through which the first part penetrates, and a second through hole through which the second part penetrates,
And a fixed end positioned between the first through hole and the second through hole.