KR102384812B1 - Core biopsy device - Google Patents

Abstract

The present invention relates to a cutting biopsy instrument capable of improving the collection efficiency, which can further improve the accuracy of tissue collection and further increase the safety during collection by newly suggesting a movement relationship between the inner needle and the outer needle when firing. It relates to an amputation biopsy instrument that can simplify the recovery of harvested tissues.

Description

Cutting biopsy device {Core biopsy device}

Embodiments of the present invention relate to amputation biopsy instruments.

In general, for the examination of living tissue, a method of injecting an instrument capable of sampling a living tissue into a living tissue and collecting a tissue to be sampled from among the living tissue is used. These types include aspiration biopsy and amputation biopsy.

Recently, excised biopsy, which can be obtained in a state in which the histological form is completely maintained by cutting tissue according to the shape of a needle, and can increase diagnostic accuracy, has been widely used. In the case of amputation biopsy, it has been widely used compared to suction biopsy in recent years because it minimizes the diameter of the needle inserted into the affected part, minimizes repetitive invasive behavior, and enables precise treatment on small specimens.

In the cut biopsy specimen apparatus described in Korean Patent Registration Nos. 10-1463867 and 10-1551311, etc., in the cutting mechanism, the inner needle is fired first and then the outer needle is fired, so that a dense capsule tissue or hard It may not penetrate the calcified tissue or it may be bent, and this may cause the nodule to be pushed backwards or the needle may not reach the target tissue area to be accurately harvested, so the problem that the procedure becomes very difficult has been pointed out. In addition, there is a limitation in that productivity is lowered because such a specimen device has a complicated structure and many components.

The present invention is to overcome the problems and/or limitations of the prior art, and by newly suggesting a movement relationship between the inner acupuncture and the outer acupuncture, the accuracy of tissue harvesting can be further improved, and the safety at the time of harvesting can be further increased. An object of the present invention is to provide an amputation biopsy device.

In addition, another object of the present invention is to provide a cutting biopsy instrument 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 extends in the axial direction, has a housing including a needle hole at one end, a tissue harvesting groove for collecting tissue at one end, and the other end A set of needles provided on a pipe to accommodate the fixed inner needle and the outer needle to be slidable along the inner needle, and positioned to protrude out of the housing through the needle hole, and one end of the outer needle and a master block positioned in the housing to be movable in the axial direction, a first space positioned in the master block and communicating with the tissue harvesting groove, and positioned within the housing to be movable in the axial direction a hub block; a spring coupled to the hub block and the master block; a first support unit selectively coupled to the master block at least at a loading position; and a second support unit selectively coupled to the hub block at least at a loading position. and a loading unit for moving the hub block to the loading position, and a firing unit configured to selectively release coupling between at least the first support unit and the master block.

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

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

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

It further comprises a recovery unit provided to recover the tissue harvested in the tissue harvesting groove, wherein the recovery unit is coupled to the acupuncture, a third handle positioned outside the housing, and extending from the third handle, It may include a support provided to selectively support the outside of the housing.

The inner needle includes a communication path that communicates with the tissue harvesting groove and the first space and is formed along a longitudinal direction, and the communication path communicates with the first space in a state in which the master block moves and in a state in which the master block does not move. and may be formed to a length that does not pass through the master block in a state in which the master block does not move.

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 has a reciprocating motion system in which the inner needle and the outer needle enter the body together in the loaded state, and the outer needle retracts from the inner needle and then advances. Problems that cannot penetrate or bend dense capsule tissue or hard calcified tissue caused by can be solved

By forming a negative pressure in the first groove and the first space of the master block during firing, it is possible to form a simple negative pressure forming structure, thereby further improving tissue harvesting efficiency. The sound pressure effect may be further improved by the structure of the master block, the structure of the pneumatic control unit, and/or the length of the communication path.

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

It is possible to further facilitate the manufacture of an acupuncture capable of generating a negative pressure.

On the other hand, in particular, since the configuration of the cutting biopsy instrument can be formed in a thin cylindrical shape by aligning the master block, the spring and the hub block inline, it is easy for the user to hold it, and the loading unit can be easily loaded by positioning the loading unit at the end of the housing. there is.

On the other hand, since the tissue present in the first groove can be recovered by moving the needle through a simple operation after tissue collection, there is an effect that enables simple sample recovery.

On the other hand, there is an effect of enabling precise treatment by increasing the length in the moving direction of the master block and making it move in close contact within the housing to perform a stable sliding operation.

According to the cut biopsy device according to the embodiments of the present invention, it is possible to perform the procedure by minimizing the change in the shape of the grip with only one hand holding the cut biopsy device.

In addition, the present invention provides a new relationship between the movement of the inner needle and the outer needle during firing, thereby further improving the accuracy of tissue harvesting and further enhancing the safety during harvesting.

Since the number of component parts can be significantly reduced, the production cost can be further reduced.

1 is a view showing a cutting biopsy instrument according to an embodiment.
FIG. 2 is a cross-sectional side view in one direction of the cut biopsy instrument of FIG. 1. FIG.
Fig. 3 is a cross-sectional side view in one direction of the cut biopsy instrument of Fig. 1;
Figure 4a is a view for explaining the structure of the needle set according to the implementation of an embodiment.
Fig. 4B is a partial cross-sectional view of an acupuncture according to an embodiment;
Fig. 4c is a partial cross-sectional view of a souk needle according to another embodiment;
Fig. 4D is a perspective view of an acupuncture needle according to another embodiment;
Fig. 4E is a cross-sectional view of the inner needle shown in Fig. 4D;
Fig. 4f is a partial side view showing another embodiment of the outer and inner needles;
Fig. 5 is a partial cross-sectional view showing an embodiment of a loading unit and a recovery unit;
6 is a view illustrating an arrangement state of a spring, a master block, and a hub block according to embodiments;
7 is a cross-sectional view illustrating a coupling state of a spring and a hub block according to an embodiment.
Fig. 8 is a partial cross-sectional view showing an embodiment of a master block and a pneumatic control unit;
Fig. 9 is a partial cross-sectional view showing an embodiment of a pneumatic control unit;
10 is a cross-sectional view illustrating a state in which a master block and a hub block are moved in a second direction;

Hereinafter, various embodiments and/or aspects are disclosed with reference to the drawings. In the following description, for purposes of explanation, numerous specific details are set forth to provide a thorough understanding of one or more aspects. However, it will also be recognized by one of ordinary skill in the art that such aspect(s) may be practiced without these specific details. The following description and accompanying drawings set forth in detail certain illustrative aspects of one or more aspects. These aspects are illustrative, however, and some of various methods may be employed in the principles of the various aspects, and the descriptions set forth are intended to include all such aspects and their equivalents.

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

As used herein, “embodiment”, “example”, “aspect”, “exemplary”, etc. may not be construed as an advantage or advantage in any aspect or design being described over other aspects or designs. . Also, the terms "comprises" and/or "comprising" mean that the feature and/or element is present, but excludes the presence or addition of one or more other features, elements, and/or groups thereof. should be understood as not

Also, terms including an ordinal number such as 1st, 2nd, etc. may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. 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 generally understood by those of ordinary skill in the art to which the present invention belongs. have the same meaning as Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in an embodiment of the present invention, an ideal or excessively formal meaning is not interpreted as

On the other hand, in the following description, although some components are omitted, or excessively enlarged or reduced in order to explain the function of each component of the present invention, the matters described in the drawings are the technical features and rights of the present invention. It will be understood that the scope is not limited.

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

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

1 to 3 , the cutting biopsy device according to an embodiment includes a housing 1, a needle set 2, a master block 3, a hub block 4, a spring 5, and a first support. It may include a unit 111 , a second support unit 15 , a loading unit 7 and a firing unit 14 .

The housing 1 is formed to extend in the axial direction (D), and may be provided with a hollow portion extending in the axial direction (D) therein. The housing 1 may include a first housing 11 , a second housing 12 , and a third housing 13 coupled to each other, wherein the first housing 11 is open at both ends and has an axial direction. It may be formed normally extending to (D), and the second housing 12 and the third housing 13 may be respectively coupled to one end and the other end of the first housing 11 . By combining the first housing 11 , the second housing 12 , and the third housing 13 , the housing 1 may have a cylindrical shape with both ends closed. In the present specification, the embodiments have shown that the housing 1 is configured by combining the first housing 11, the second housing 12, and the third housing 13, but the housing 1 is necessarily limited thereto. However, the first housing 11 , the second housing 12 , and the third housing 13 may be integrally formed.

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

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

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

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

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

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

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

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

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

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

The inner needle 22 is formed to have an outer diameter corresponding to the inner diameter of the outer needle 21 so as to penetrate the outer needle 21 , and is installed to penetrate the housing 10 in the axial direction (D). The end of the fastening needle 22 in the first direction D2 is provided with a second blade 221 formed in an inclined direction, and the end in the second direction D2 becomes the second fixed end 222 to form a collection unit ( 8) can be fixed. According to the embodiment shown in FIG. 2 , it is shown that the fastening needle 22 is fixed to the recovery unit 8 , but the present invention is not necessarily limited thereto. In this case, the second fixing end 222 of the needle 22 may be fixed to the housing 1 . In the present invention, the fastening needle 22 may maintain a state in which the second fixed end 222 is fixed and does not move while the cutting biopsy instrument is loaded and fired.

The first blade 211 and the second blade 221 may be formed to have inclinations in the same direction. In this case, the inclination angles of the first blade 211 and the second blade 221 are not necessarily the same, and according to an exemplary embodiment, the inclination angle a1 of the first blade 211 is the second blade 221 . ) may be equal to or smaller than the inclination angle a2. Accordingly, when the needle set (2) is inserted into the tissue, the tissue is caught between the first blade (211) and the second blade (221) to prevent damage to the harvested tissue, and the needle set (2) in the tissue is stably can be inserted.

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

On the other hand, the inner needle 22 has a tissue harvesting groove 223 formed adjacent to the second blade 221 . The tissue harvesting groove 223 has a groove inserted into the inner needle 22 by a predetermined depth from the surface of the inner needle 22 . can be The first groove 223 may be formed to have a sufficient length and width so that the tissue can be collected easily by seating the tissue on the surface thereof. The tissue harvesting groove 223 may have a structure of a groove opened upward by removing a specific portion of the inner needle 22 by a predetermined depth, but is not necessarily limited thereto, and may have a structure of a groove opened downward. and may optionally have a structure of a groove open toward the side.

A communication path 224 may be formed in the needle 22 with a predetermined length. The communication path 224 communicates with the tissue harvesting groove 223, and as can be seen in FIG. 4b , the first of the valley structure formed to be cut along the longitudinal direction (eg, the axis (D) direction) of the inner needle 22 . It may be an incision groove. However, the present invention is not necessarily limited thereto, and as shown in FIG. 4C , the communication path 224 includes a first groove 2241 formed to be spaced apart from the tissue harvesting groove 223, the tissue harvesting groove 223 and the first A second cut-out groove 2242 connecting the grooves 2241 may be included. The first groove 2241 may have the same shape as the tissue harvesting groove 223, and may have a structure of a groove open upward, downward, or sideways in which the corresponding portion of the inner needle 22 is removed to a predetermined depth. The first groove 2241 may have a structure opened in the same direction as the tissue harvesting groove 223 . The first groove 2241 may be positioned to be spaced apart from the tissue harvesting groove 223 in the second direction D2 . Between the tissue harvesting groove 223 and the first groove 2241, a portion of the inner needle 22 is maintained as it is to become a barrier 225, and the second incision groove 2242 is formed on the barrier 225 by the inner needle 22 ) may be formed in a valley structure to be cut along the longitudinal direction. Since the tissue harvesting groove 223 and/or the first groove 2241 is formed by removing a specific portion of the inner needle 22 to a predetermined depth, it is easier to process than the aforementioned incision groove. Therefore, as shown in Figure 4c, after forming the tissue harvesting groove 223 and the first groove 2241 to be spaced apart, by forming the second incision groove 2242 in the barrier 225 between them, along the longitudinal direction of the needle As compared to the structure of FIG. 4B in which the groove is formed, workability may be further increased.

According to another embodiment, as shown in FIGS. 4D and 4E , the tissue harvesting groove 223 may further include a second groove 2231 formed along its longitudinal direction. The second groove 2231 may be connected to the communication path 224 , and thus may be a portion to which a negative pressure, which will be described later, is applied. The second groove 2231 may be formed to have a length equal to or greater than half the length of the tissue harvesting groove 223 in the longitudinal direction, so that the negative pressure is uniformly formed over the half or more of the total length of the tissue harvesting groove 223 . can do.

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

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

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

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

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

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

More specifically, in the collection unit 8 , a third handle 81 provided in a flat shape to be gripped by a user is located outside the housing 1 . The recovery unit 8 may further include a body 82 that extends from the third handle 81 in the first direction D1 and is inserted into the housing 1 , and according to an embodiment, the body 82 . The second fixing end 222 of the acupuncture 22 described above may be fixedly coupled to the 82 .

The body 82 may be formed on a pipe, and a ring 84 may be provided at one end in the longitudinal direction. The main body 82 may not protrude out of the housing 1 by this ring 84 . The body 82 can specifically be positioned within the housing 1 through the first opening 131 of the third housing 13 , wherein a ring 84 is provided in the third housing 13 within the housing 1 . It is possible to prevent the main body 82 from being separated in the second direction D2. The structure of the ring 84 of the recovery unit 8 as described above may further improve assembly of the recovery unit 8 with respect to the housing 1 . That is, by inserting the ring 84 into the housing 1 through the first opening 131 of the third housing 13, the assembly of the collection unit 8 to the housing 1 can be completed. there is.

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

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

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

According to one embodiment, as can be seen in FIG. 6 , the spring 5 is disposed within the housing 1 to be aligned in-line with the master block 3 and the hub block 4 along the axial direction D. can be located

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

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

The first part 51 and the second part 52 may be provided to have different spring pitches, and the spring pitch of the first part 51 is smaller than the spring pitch of the second part 52 . can The first part 51 and the second part 52 have different spring pitches, but each part may be provided to have a uniform spring pitch. According to an embodiment, the first part 51 may have a relatively tensile pitch than that of the second part 52 , and the second part 52 may have a relatively compressed pitch than the first part 51 . may have According to another embodiment, the first part 51 may be wound to be a tension spring, and the second part 52 may be wound to be a compression spring.

According to an embodiment, in a state in which only the hub block 4 is moved in the second direction D2 in a loaded state, that is, in a state in which the master block 3 is fixed, and then fixed, the first part 51 and the second part Reference numeral 52 is in a state in which all of the hub blocks 4 have an elastic force in the first direction D1. After that, when the fixing of the master block 3 inside the housing 1 is released by the operation of the firing unit 14, since the hub block 4 is still fixed in the housing 1, the first part ( 51), the master block 3 moves in the second direction D2. After that, when the master block 3 comes into contact with the hub block 4 and releases the fixation of the hub block 4 , the master block 3 and the hub block 4 due to the restoring force of the second part 52 . At the same time, it moves in the first direction D1. Thus, according to the movement in the second direction (D2) of the master block (3) and the restoration in the first direction (D1), the outer needle (21) coupled to the master block (3) is simultaneously moved in the second direction (D2) and It sequentially moves in the first direction D1 , and thus tissue may be collected in the first groove 223 .

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

The spring 5 may be installed to penetrate the through hole 41 of the hub block 4 .

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

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

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

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

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

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

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

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

8 is a cross-sectional view illustrating an embodiment of the master block 3 . 2, 3 and 6 , the master block 3 according to an embodiment is movable in the axial direction D in a state located in the housing 1 . The master block 3 may include a first fixing unit 34 provided to be elastically movable in a direction perpendicular to the longitudinal direction thereof. The first fixing unit 34 is provided to protrude from the surface of the master block 3 , and can move with elasticity in a direction opposite to the protruding direction. Referring to FIG. 8 , the first fixing unit 34 is caught by the first supporting unit 111 , and accordingly, the movement of the master block 3 may be constrained by the first supporting unit 111 . The other end 142 of the above-described firing unit 14 presses the first fixing unit 34 by a user's manipulation, and thus the first fixing unit 34 is fixed to the first supporting unit 111 . This can be turned off.

At least one first through hole 31 formed in the axial direction D is formed at an end of the master block 3 in the first direction D1, and the first through hole 31 is formed in the master block 3 A flow path 32 in communication with it may be located. When there are a plurality of first through-holes 31 , the first through-holes 31 may be connected to each other through the flow path 32 . The first through hole 31 and the flow path 32 may form a first space 30 . The outer cover 21 may be fixedly coupled to the portion 301 of the master block 3 adjacent to the first through hole 31 . When there are a plurality of first through holes 31 , the portion 301 may be a central portion of the master block 3 between the first through holes 31 . In addition, the inner needle 22 may pass through the flow passage 32 . In particular, the communication passage 224 of the inner needle 22 passes through the passage 32 so that the communication passage 224 and the passage 32 communicate with each other. can be The communication path 224 of the inner needle 22 is formed with a length sufficient to be connected to the flow path 32 and may be formed to a length that can end through the flow path 32, the master block 3 is The communication path 224 and the flow path 32 may be formed to have a communication length even when they are moved to the maximum in the second direction D2. However, as shown in FIG. 3 , the communication path 224 of the fastening needle 22 is not formed to have a length that passes through the master block 3 in a state in which the master block 3 does not move in the second direction D2. This can be done, and accordingly, the negative pressure is completely formed and/or maintained in the communication path 224 , and it is possible to prevent the negative pressure from being leaked. When the communication path 224 extends through the master block 3 to the space of the other housing 1, the sound pressure effect may be reduced. That is, in a state in which the master block 3 does not move in the second direction D2 , the end 2240 of the communication path 224 in the second direction D2 is formed between the first space 30 and the master block 3 . ) may be located between the ends in the second direction D2. More specifically, the end 2240 of the communication path 224 in the second direction D2 may be positioned between the first space 30 and the coupling groove 33 . And at this time, the length t32 from the end of the second direction D2 of the first space 30 to the end 2240 of the communication path 224 is the length t32 in the axial direction D of the first space 30 ( t31) or greater than t31). According to this structure, negative pressure may be effectively generated in the first space 30 and the communication path 224 in the firing process.

At the time of tissue collection, the master block 3 moves in the second direction D2 and then moves back to the first direction D1 to return to its original position. will be done At this time, the needle hole 122 and the first space 30 may communicate with each other to achieve a flow of air. When the user inserts the needle set 2 into the tissue and then collects the tissue, the master block 3 moves rapidly in the second direction D2 so that the outer needle 21 moves, and accordingly, the tissue harvesting groove 223 This is opened so that the tissue to be harvested is seated in the tissue harvesting groove 223 . At this time, the air forms an air flow path leading to the first space 30 and the communication path 224 through the needle hole 122, and since the air is introduced into the narrow gap of the needle hole 122, the air flow It is impossible to keep up with the moving speed of the master block 3 , and accordingly, negative pressure is applied to at least a portion of the above-described air flow path, for example, the first space 30 and the communication path 224 . Accordingly, negative pressure is also applied to the tissue harvesting groove 223 communicating with the first space 30 and the communication path 224 to increase adhesion to the tissue to be seated in the tissue harvesting groove 223, and thus tissue harvesting efficiency This can be further improved. Immediately thereafter, as the master block 3 moves rapidly in the first direction D1 , the outer sheath 21 moves to close the tissue harvesting groove 223 and simultaneously cut the tissue seated in the tissue harvesting groove 223 .

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

Optionally, the cutting biopsy device according to another embodiment may further include an air pressure control unit 6 interposed between the needle hole 122 and the master block 3 . The air pressure control unit 6 controls the air flow to the air flow path leading from the needle hole 122 to the first space 30 and the communication path 224 , so that the negative pressure effect applied to at least a part of the air flow path can be further increased, and thus tissue harvesting efficiency can be further improved.

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

As shown in FIG. 8 , the control block 61 may include a space 610 communicating with the first space 30 therein. This space 610 may communicate with the adjacent first space 30 , and may also communicate with the needle hole 122 and/or the ventilation hole 121 . The space 610 may include a second space 612 and a second through hole 614 , and the outer diameter of the second space 612 and/or the second through hole 614 is the first space 30 . may be smaller than the outer diameter of Accordingly, the needle hole 122 and/or the air passage leading to the vent 121, the space 610, and the first space 30 can be formed in a structure with high resistance, and thus the above-mentioned negative pressure effect can be reduced. can be raised further.

According to the embodiment shown in FIG. 9 , the control block 61 may include a wall 611 located on one side and a second space 612 located on the other side. The second space 612 may communicate with the needle hole 122 and/or the ventilation hole 121 through at least one second through hole 614 formed in the wall 611 . The second space 612 may communicate with the first space 30 of the master block 3 . According to an embodiment, the total volume of the second through hole 614 may be smaller than that of the second space 612 . Accordingly, resistance to the flow of air introduced through the needle hole 122 and/or the vent 121 may occur, which may be more effective in generating the aforementioned negative pressure. The control block 61 may be fixed inside the housing 1 , and may function as a stopper for movement of the master block 3 . The control block 61 may have a cushioning function with respect to the master block 3 , and thus may be provided as a cushioning member. Therefore, it is possible to reduce the noise caused by the master block 3 colliding with the control block 61, which can be performed in a comfortable state without giving the patient a sense of intimidation.

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

The first film assembly 62 is positioned between the needle hole 122 and/or the vent hole 121 and the control block 61 , and at least one cutout 622 radially cut from the central hole 621 . ), and a frame 623 is provided on the edge to be fixed inside the housing 1, and according to one embodiment, at least the frame 623 of the first film assembly 62 is a control block 61 ) can be attached to Due to the central hole 621 and the cutout 622 , the first film assembly 62 may be allowed to flow in the flow of air.

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

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

Depending on the first film assembly 62 and/or the second film assembly 63, the flow of air may be further controlled by resisting the flow of air passing therethrough. As can be seen in FIG. 8 , in a state in which the master block 3 does not move in the second direction D2 , the second film assembly 63 is adjacent to the end of the master block 3 in the first direction D1 . , the second film assembly 63 may block the flow of air formed from the needle hole 122 and/or the vent 121 to the first space 30 to some extent. After that, as can be seen in FIG. 10 according to the firing operation, when the master block 3 moves in the second direction D2, the second film assembly 63 moves together with the master block 3 in the second direction D2. Moving, at this time, the first film assembly 62 faces the control block 61 in the second direction D2 and is in a state that is difficult to bend, so the vent hole 121 and/or the needle hole 122. Through this, it is possible to block the inflow of air between the master block 3 and the control block 61 to some extent. Accordingly, a negative pressure is formed in the space between the master block 3 and the control block 61 and in the first space 30 . Accordingly, a negative pressure may also be applied to the communication path 224 and the tissue harvesting groove 223 communicating with the first space 30 , so that adhesion to the tissue seated in the tissue harvesting groove 223 may be improved.

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

Optionally, according to another embodiment, a fourth space 123 may be further positioned between the first film assembly 62 and the needle hole 122 and/or the ventilation hole 121 . Therefore, the air flow from the first space 30 to the needle hole 122 and/or the vent 121 may further pass through the fourth space 123, at which time the first film assembly 62 is A space sufficient for bending in one direction D1 may be secured.

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

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

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

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

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

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

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

At this time, since the movement of the master block 3 is suppressed by the first support unit 111 , the first part 51 of the spring 5 is tensioned while the master block 3 and the hub block 4 are spaced apart. and, accordingly, an elastic force is generated in the first portion 51 . At this time, the second part 52 is in a compressed state and has elastic force.

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

Thereafter, the user presses the firing unit 14 to proceed with the firing step.

When the user presses the firing unit 14, the firing unit 14 causes the other end 142 to press the first fixed unit 34, and eventually the first fixed unit 34 to the first supporting unit 111 release the fix. Accordingly, the master block 3 is moved in the second direction D2 by the restoring force of the first part 51 of the spring 5, and at the same time moves in the second direction D2 fixed to the master block 3, The tissue harvesting groove 223 may be exposed, and the tissue to be harvested may be pushed and seated into the tissue harvesting groove 223 .

At this time, as described above, negative pressure is applied to the communication path 224 and the first space 30 that communicate with the tissue harvesting groove 223 to increase adhesion to the tissue to be seated in the first groove 223 , , and thus tissue harvesting efficiency can be further improved.

On the other hand, as the master block 3 moves in the second direction D2, the master block 3 moves the second support unit 15 that has been introduced into the housing 1 and fixed the hub block 4 to the second direction D2. pressed, thereby releasing the selective coupling between the hub block 4 and the second support unit 15 . Then, the master block 3 and the hub block 4 move in the first direction D1 at the same time by the elastic force of the second part 52 of the spring 5 .

As the master block 3 is restored to its original state by the elastic force of the spring 5, the outer fabric 21 fixed to the master block 3 moves in the first direction D1 to cover the tissue harvesting groove 223 By doing so, the tissue in the upper portion of the tissue harvesting groove 223 is cut. Accordingly, the harvested tissue is positioned between the outer needle 21 and the tissue harvesting groove 223 . At this time, as described above, the second film assembly 63 faces the master block 3 and thus becomes difficult to bend, and the first film assembly 62 is sufficiently bent in the first direction D1. Therefore, by the movement of the master block 3 and the second film assembly 63, the air between the master block 3 and the control block 61 is pushed in the first direction (D1), the air It may be discharged to the communication hole 121 and/or the needle hole 122 through the space 610 and the second through hole 614 of the control block 61 . Accordingly, the master block 3 may smoothly move in the first direction D1 without air resistance.

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

In the recovery step, the user releases the support to the housing 1 by manipulating the second support 83 , and pushes the third handle 81 in the first direction D1 so that the main body 82 moves in the first direction D1. to enter the housing (1) along the When the main body 82 enters the housing 1, the inner needle 22 coupled to the main body 82 moves in the first direction D1, and accordingly, the tissue harvesting groove ( 223 is exposed, so that the user can recover the tissue collected in the tissue harvesting groove 223 .

As described above, since the embodiment of the present invention enables the recovery of the harvested tissue by a simple operation, the user can proceed to the next tissue harvesting operation, thereby facilitating a plurality of continuous tissue harvesting.

After the tissue is retrieved, the user may pull the third handle 81 in the second direction D2 to expose the second support 83 to the outside of the housing 1 again to prepare for the next firing.

As described above, although the embodiments have been described with reference to the limited embodiments and drawings, various modifications and variations are possible from the above description by those skilled in the art. For example, the described techniques are performed in an order different from the described method, and/or the described components of the system, structure, apparatus, circuit, etc. are combined or combined in a different form than the described method, or other components Or substituted or substituted by equivalents may achieve an appropriate result. Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

Claims (1)

a housing extending in the axial direction and including a needle hole at one end;
It includes an inner needle having a tissue harvesting groove at one end, the other end of which is fixed, and an outer needle provided on a pipe to accommodate the inner needle and provided to slide along the inner needle, and through the needle hole on the outside of the housing three needles positioned to protrude into;
a master block coupled to one end of the outer chim and positioned in the housing to be movable in the axial direction;
a first space located in the master block and communicating with the tissue harvesting groove;
a hub block positioned within the housing to be movable in the axial direction;
a spring coupled to the hub block and the master block;
a first support unit selectively coupled to the master block at least in a loading position;
a second support unit selectively coupled to the hub block at least in a loading position;
a loading unit for moving the hub block to the loading position; and
a firing unit provided to selectively release coupling between at least the first support unit and the master block;
The acupuncture includes a communication path that communicates with the tissue harvesting groove and the first space and is formed along a longitudinal direction,
The first space includes at least one first through hole formed in the master block in the axial direction and communicating with the outside of the master block and a flow path connected to the first through hole,
The outer chim is fixedly coupled to a portion of the master block adjacent to the first through hole,
The sokchim is installed through the flow path, and the communication path of the sokchim communicates with the flow path,
An air pressure control unit for selectively blocking the air flow toward the first space is interposed between the needle hole and the master block.

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