KR102816705B1 - Needle set for biopsy - Google Patents

Abstract

One embodiment of the present invention relates to a cutting biopsy instrument, comprising: a needle set including a blunt end and an outer end through which the blunt end penetrates and is configured to move relatively to the blunt end; and a moving member coupled to the outer end and configured to move the outer end along a biopsy direction, wherein the blunt end is formed to penetrate the outer end and includes a needle body, a collecting groove formed in one region of the needle body, and a head portion connected to the needle body and inclined toward an area for biopsy, and further comprising a friction reducing portion in an overlapping region according to the relative movement of the blunt end and the outer end.

Description

Needle set for biopsy

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

Generally, to examine a living tissue, a device capable of collecting a living tissue sample is injected into the living tissue, and the tissue to be sampled is collected from the living tissue.

For example, a method is being utilized in which the tissue to be collected is cut by the shape of a needle and the histological form is maintained intact.

However, when inserting a probe to collect such living tissue, it may not penetrate properly or may bend when penetrating the tissue for examination such as the membrane tissue or hard calcified tissue, and there are limitations in improving the accuracy and stability of tissue collection for living tissue due to the pain felt by the subject of examination during such penetration.

The present invention can provide a cutting biopsy device in which a needle set is not damaged even when cutting multiple times.

One embodiment of the present invention provides a cutting biopsy device including a needle set including an inner needle part and an outer needle part through which the inner needle part penetrates and is configured to move relatively to the inner needle part, and a moving member coupled to the outer needle part and configured to move the outer needle part along a biopsy direction, wherein the inner needle part is formed to penetrate the outer needle part, and includes a needle body, a collection groove formed in one area of the needle body, and a head part connected to the needle body and inclined so as to face an area for biopsy, and further including a friction reducing part in an overlapping area according to the relative movement of the inner needle part and the outer needle part.

In one embodiment, the friction reducing member may be located in the extraction groove of the insert member.

According to another embodiment, the sampling groove may include a sampling surface that is drawn inward from a surface of the needle body, and a support wall positioned at one end of the sampling surface.

In another embodiment, the friction reducing member may be located on the support wall.

According to another embodiment, the prosthesis includes a tip region at an end in a direction in which the prosthesis is inserted into the human skin, and the friction reduction region can be positioned in an area adjacent to the tip region when the prosthesis moves in the insertion direction.

In another embodiment, the support wall may include a plurality of inclined surfaces having different angles with respect to the sampling surface.

According to another embodiment, the friction reducing member may be located at an end of the outer shell.

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

The cutting biopsy device according to embodiments of the present invention can prevent damage to the needle set even during multiple procedures, and enable the operator to perform the procedure with greater stability.

FIG. 1 is a cross-sectional side view schematically illustrating a biopsy needle set according to one embodiment.
Figure 2 is a drawing for explaining the operation of the biopsy needle set of Figure 1.
Figure 3 is an enlarged view of part A of Figure 2.
Figure 4 is an enlarged view showing another example of part A of Figure 2.
FIG. 5 is a schematic cross-sectional side view of a cutting biopsy instrument including a biopsy needle set according to another embodiment of the present invention.
Figure 6 is a drawing for explaining the operation of the cutting biopsy device of Figure 5.
FIG. 7 is a cross-sectional side view illustrating a portion of an outer shell according to another embodiment.
FIG. 8 is a drawing showing a state of coupling of a surface part and a moving block according to one embodiment.
FIG. 9 is a drawing showing a state of coupling of a surface part and a moving block according to another embodiment.

The present invention can be modified in various ways and has various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention and the methods for achieving them will become clear with reference to the embodiments described in detail below together with the drawings. However, the present invention is not limited to the embodiments disclosed below, and can be implemented in various forms.

In the examples below, the terms first, second, etc. are not used in a limiting sense but are used for the purpose of distinguishing one component from another.

In the examples below, singular expressions include plural expressions unless the context clearly indicates otherwise.

In the examples below, terms such as “include” or “have” mean that a feature or component described in the specification is present, and do not exclude in advance the possibility that one or more other features or components may be added.

In the examples below, when it is said that a part such as a unit, region, or component is located above or on another part, this includes not only the case where it is directly above the other part, but also the case where another unit, region, or component is interposed in between.

In the examples below, terms such as connect or combine do not necessarily imply a direct and/or fixed connection or combination of two members, unless the context clearly indicates otherwise, and do not exclude the presence of another member between the two members.

In the drawings, the sizes of components may be exaggerated or reduced for convenience of explanation. For example, the sizes and thicknesses of each component shown in the drawings are arbitrarily shown for convenience of explanation, and therefore the present invention is not necessarily limited to what is shown.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. When describing with reference to the drawings, identical or corresponding components are given the same drawing reference numerals and redundant descriptions thereof will be omitted.

FIG. 1 is a cross-sectional side view schematically illustrating a biopsy needle set according to one embodiment, and FIG. 2 is a drawing for explaining the operation of the biopsy needle set of FIG. 1. FIG. 3 is an enlarged view of portion A of FIG. 2.

Referring to FIGS. 1 to 3, the biopsy needle set (100) of the present embodiment may include an inner needle part (110) and an outer needle part (120).

A biopsy needle set (100, also referred to as “needle set” hereinafter) can accommodate at least one area of tissue from a living body, for example, a human body, for biopsy.

For example, the biopsy needle set (100) can define the examination direction based on the biopsy direction (D) of the first direction (D1) which is the forward direction or the second direction (D2) which is the backward direction. Specifically, the biopsy needle set (100) is moved in the forward direction (D1) against a living body, for example, the epidermis of a human body, so as to penetrate an area of the epidermis, be inserted into the epidermis, and reach an internal area of the living body where a biopsy is desired, and then the desired tissue is removed, and then moved in the backward direction (D2) so as to come out of the epidermis, so that a biopsy can be easily performed on the tissue removed by the biopsy needle set (100).

The outer shell (120) may include an outer shell body (122) and an insertion part (121).

The outer body (122) may have a long, extended shape similar to a hollow pipe. Through this, the inner body (110) may be arranged to penetrate the outer body (120).

As an optional embodiment, at least one area of the outer body (122) may have a hollow pipe-like shape.

The insertion portion (121) may be formed to be connected to the outer body (122) and may be positioned to face the area for biopsy. For example, the insertion portion (121) may include an area that begins to penetrate the epidermis of the human body.

The insertion part (121) is hollow and may have a shape like a pipe that is integrally extended with the outer body (122) and has an open end.

The insertion portion (121) includes an inclined region, and may have an inclined shape in an area including, for example, an end of the insertion portion (121), through which it can easily begin to penetrate the epidermis of the human body.

As an optional embodiment, the inclined region of the insertion portion (121) may have an inclined shape with an angle of 30 degrees or less, and, as a specific example, may have an angle of 20 degrees or less. Through this, pain can be reduced when piercing the epidermis of the human body.

As an optional embodiment, an area of one end of the insertion portion (121) may have a tip area (1211) having an acute angle, for example, the tip area (1211) may be formed sharply at an acute angle in an area that first begins to pierce the epidermis of the human body. As a specific example, the tip area (1211) may be formed on the upper portion of the inclined area of the insertion portion (121).

Through this, the biopsy needle set (100) can be easily inserted into the human epidermis from the insertion portion (121) and easily moved toward the desired tissue direction of the living body.

Additionally, as an optional embodiment, a cutting area may be formed on the outer surface of the insertion portion (121), i.e., the opposite surface of the inner surface facing the insertion portion (110).

The inclined shape of the insertion portion (121) and the cutting area on the outer surface of the corresponding area enable the outer needle portion (120) to be inserted more naturally and easily when penetrating the epidermis of the human body, thereby facilitating tissue collection.

In addition, deformation of the insertion portion (121) and the tip region (1211) can be reduced, and pain to the biopsy subject can be reduced.

In addition, as an optional embodiment, the outer needle part (120) may be formed to be able to move relative to the inner needle part (110). For example, the outer needle part (120) may have an inner space in a hollow form from the outer needle body (122) to the insertion part (121), and the inner needle part (110) may be arranged in the inner space of the outer needle part (120). As a specific example, the minimum diameter of the inside of the outer needle part (120) may be at least larger than the maximum diameter of the inner needle part (110).

The difference between the minimum diameter inside the outer needle part (120) and the maximum diameter outside the inner needle part (110) should be minimized, which is better. However, considering manufacturing tolerances, etc., this difference can be set to 0.05 mm or less (greater than 0). The more the difference between the minimum diameter inside the outer needle part (120) and the maximum diameter outside the inner needle part (110) is minimized, the more the resistance transmitted from the tissue of the human body can be minimized when inserting the biopsy needle set (100) into the human body, and the smoothest possible insertion of the needle set (100) is possible. In particular, when the difference is greater than 0.05 mm, the operator may feel a great sense of resistance when inserting the needle set (100).

The needle part (110) may include a needle body (112), a collection groove (113), and a head part (111).

The inner body (112) can be placed in the inner space of the outer body (120).

The collection groove (113) is formed in one area of the needle body (112) and may include an area where tissue for biopsy is received using a biopsy needle set (100).

The extraction groove (113) has an elongated shape and may have, for example, an appropriate length in the longitudinal direction of the insert (110).

The sampling groove (113) may have a width in a direction orthogonal to the longitudinal direction. As an optional embodiment, the width of the sampling groove (113) may have a value corresponding to the maximum width of the needle body (112).

As an optional embodiment, the depth of the sampling groove (113) may be greater at the center than at the edges on both sides in the width direction. For example, the sampling groove (113) may become deeper from the edges on both sides in the width direction toward the center, thereby effectively accommodating a large amount of tissue in the sampling groove (113).

The extraction groove (113) can be placed close to the head portion (111).

As an optional embodiment, the above-described harvesting groove (113) may include a harvesting surface (1131) and a supporting wall (1132). The harvesting surface (1131) corresponds to an area where tissue harvested in the harvesting groove (113) is settled, and may be formed in a groove shape that is drawn inward from the surface of the needle body (112). The harvesting surface (1131) may be formed to form a flat surface, but is not necessarily limited thereto, and may be an arc shape in which the center is drawn inward more.

A support wall (1132) may be formed at one end of the harvesting surface (1131). According to one embodiment, the support wall (1132) may be positioned at an end of the harvesting surface (1131) in the first direction (D1). The support wall (1132) may be provided with an inclined surface to prevent the tissue settled on the harvesting surface (1131) from being pushed out by the surface (120) and leaving the harvesting surface (1131) when the surface (120) cuts the tissue settled on the harvesting surface (1131) during tissue harvesting.

As an optional embodiment, the collection groove (113) may be formed to overlap with a portion of the insertion portion (121) of the outer portion (120), and for example, may be positioned to overlap with an inclined portion of the insertion portion (121). Through this, the depth of insertion when inserting the biopsy needle set (100) into the epidermis to collect tissue can be reduced, making it easy to collect tissue.

The head portion (111) may be formed to be connected to the main body (112) of the needle and may be positioned to face the area for biopsy. For example, the head portion (111) may include an area that begins to enter through the epidermis of the human body together with the insertion portion (121).

The head portion (111) includes an inclined region, and may have an inclined region in the same direction as the inclined shape of the insert portion (121), for example.

Through this, the outer needle (120) can be inserted so as to penetrate the human epidermis while containing the inner needle (110) and approach the tissue to be harvested.

As an optional embodiment, the inclined region of the head portion (111) may have an inclined shape with an angle of 30 degrees or less, and, as a specific example, may have an angle of 20 degrees or less.

The needle set (100) according to the embodiment can have the cutting angle of the cutting area of the inner needle (110) and the cutting angle of the cutting area of the outer needle (120) be opposite to each other. According to the embodiment, the tip area (1211) of the outer needle (120) can be prevented from protruding outside the cutting area of the inner needle (110) while the collecting groove (113) of the inner needle (110) is completely covered by the outer needle (120).

The biopsy needle set (100) of Fig. 1 is inserted in the first direction (D1) toward an area from which tissue is to be collected, for example, human tissue, by penetrating the epidermis, and then the collection groove (113) of the inner needle part (110) covered by the outer needle part (120) is exposed as shown in Fig. 2.

To facilitate this movement, the outer surface of the inner needle (110) can be formed as close as possible to the inner surface of the outer needle (120) or with a small gap therebetween, thereby allowing the inner needle (110) and the outer needle (120) to penetrate the epidermis as one unit, and minimizing the resistance felt by the operator when inserting the needle set (100) into the tissue.

At this time, as an optional embodiment, the outer needle part (120) may move in the second direction (D2) while the inner needle part (110) is fixed so that the extraction groove (113) may be exposed.

A desired tissue can be accommodated in the exposed harvest groove (113), and at this time, the tissue can be effectively placed and maintained in the harvest groove (113).

After collecting tissue in a state as shown in Fig. 2, the outer needle (120) advances again in the first direction (D1) so that the collecting groove (113) is covered by the outer needle (120) in a state as shown in Fig. 1, so that the tissue settled in the collecting groove (113) by the outer needle (120) can be cut. Thereafter, the biopsy needle set (100) comes out of the epidermis to open the collecting groove (113) again, and then the tissue can be recovered from the collecting groove (113).

In this biopsy process, the outer needle (120) advances in the first direction (D1) to cut the tissue settled in the collection groove (113) and then passes the head (111) of the inner needle (110). At this time, the tip area (1211) of the outer needle (120) may pass while intersecting with the support wall (1132) of the inner needle (110). In this case, the tip area (1211) of the outer needle (120) may collide with the support wall (1132) of the inner needle (110), causing damage to the tip area (1211). As a result, the operator may experience resistance when collecting tissue, and there is a concern that the tissue collection may not proceed smoothly.

Meanwhile, this biopsy process may be performed multiple times in succession depending on the type of procedure. That is, the operator may insert a needle set (100) into one part of the human body to collect tissue, and then insert a needle set (100) into an adjacent part and/or another part to collect additional tissue.

In this way, when performing a typical biopsy procedure, a single needle set (100) must be operated to perform multiple procedures. However, as described above, if the tip area (1211) of the outer needle part (120) collides with the support wall (1132) of the inner needle part (110), causing damage to the tip area (1211), the operator will experience a lot of resistance when inserting the needle set (100) into the tissue, and the damaged tip area (1211) may also result in damaging adjacent tissues of the targeted tissue.

In order to solve this problem, a needle set (100) according to one embodiment includes a friction reduction portion in an overlapping area according to the relative movement of the inner and outer needle portions. This friction reduction portion prevents the tip area (1211) of the outer needle portion (120) from being damaged by friction with the inner needle portion (110) when it moves past the inner needle portion (110), and enables the biopsy device to be operated without difficulty even during multiple procedures.

According to one embodiment, the friction reducing member (R1) may be positioned in the subcutaneous sampling groove. More specifically, the friction reducing member (R1) may be positioned in the supporting wall (1132) of the sampling groove.

This friction reduction portion (R1) can be positioned in the area of the support wall (1132) of the extraction groove adjacent to the tip area (1211) when the outer surface moves in the first direction (D1).

According to one embodiment, as shown in FIG. 3, the support wall (1132) may be formed by a first support wall (11321) and a second support wall (11322) having different inclination angles. The friction reduction portion (R1) may be implemented by the structure of the first support wall (11321) and the second support wall (11322). The first support wall (11321) may be an area closer to the extraction surface (1131). The second support wall (11322) may be an area located closer to the outer upper surface of the head portion (111).

And the first support wall (11321) and the second support wall (11322) may have a structure that is connected to each other, but is not necessarily limited thereto, and a multi-stage connection structure may be further positioned between the first support wall (11321) and the second support wall (11322).

According to one embodiment, the first angle (a1) formed by the first support wall (11321) and the harvesting surface (1131) may be smaller than the second angle (a2) formed by the second support wall (11322) and the harvesting surface (1131). Accordingly, the first support wall (11321) may form a steeper slope with respect to the harvesting surface (1131) than the second support wall (11322).

In this way, the first support wall (11321) forms a steeper slope with respect to the harvesting surface (1131) than the second support wall (11322), thereby allowing the first support wall (11321) to support the tissue, thereby preventing the tissue from being pushed away from the harvesting surface (1131) by the prosthesis (120) during tissue cutting. In addition, the second support wall (11322) forms a smaller slope with respect to the harvesting surface (1131) than the first support wall (11321), thereby preventing the tip region (1211) of the prosthesis (120) from being damaged during the tissue cutting process.

Therefore, even if the needle set (100) is used multiple times, the needle set (100) may not be damaged or the operator may not feel discomfort in operating it.

According to one embodiment, as can be seen in FIG. 3, the first length (L1) of the first support wall (11321) can be longer than the second length (L2) of the second support wall (11322).

By forming the first length (L1) of the first support wall (11321) longer than the second length (L2) of the second support wall (11322), the first support wall (11321) can function higher as a support for the cut tissue, as described above.

Fig. 4 illustrates another embodiment of part A of Fig. 2. The same elements as in Fig. 3 are denoted by the same terminology.

According to another embodiment, the needle set (100) may include a first support wall (11321) and a second support wall (11322) having different inclination angles, as shown in FIG. 4. The first support wall (11321) may be an area closer to the harvesting surface (1131). The second support wall (11322) may be an area closer to the outer surface of the head portion (111).

And the first support wall (11321) and the second support wall (11322) may have a structure that is connected to each other, but is not necessarily limited thereto, and a multi-stage connection structure may be further positioned between the first support wall (11321) and the second support wall (11322).

According to another embodiment, the first support wall (11321) and the extraction surface (1131) may be connected to have a curvature. And/or the second support wall (11322) and the outer surface of the head portion (111) may be connected to have a curvature. And/or the first support wall (11321) and the second support wall (11322) may be connected to have a curvature.

According to another embodiment, the first angle (a1) formed by the first support wall (11321) and the harvesting surface (1131) may be smaller than the second angle (a2) formed by the second support wall (11322) and the harvesting surface (1131). Accordingly, the first support wall (11321) may form a steeper slope with respect to the harvesting surface (1131) than the second support wall (11322).

In this way, the first support wall (11321) forms a steeper slope with respect to the harvesting surface (1131) than the second support wall (11322), thereby allowing the first support wall (11321) to support the tissue, thereby preventing the tissue from being pushed away from the harvesting surface (1131) by the prosthesis (120) during tissue cutting. In addition, the second support wall (11322) forms a smaller slope with respect to the harvesting surface (1131) than the first support wall (11321), thereby preventing the tip region (1211) of the prosthesis (120) from being damaged during the tissue cutting process.

Therefore, even if the needle set (100) is used multiple times, the needle set (100) may not be damaged or the operator may not feel discomfort in operating it.

According to another embodiment, as can be seen in FIG. 4, the first length (L1) of the first support wall (11321) can be longer than the second length (L2) of the second support wall (11322).

By forming the first length (L1) of the first support wall (11321) longer than the second length (L2) of the second support wall (11322), the first support wall (11321) can function higher as a support for the cut tissue, as described above.

FIG. 5 is a schematic cross-sectional side view of a cutting biopsy instrument including a biopsy needle set according to another embodiment of the present invention, and FIG. 6 is a drawing for explaining the operation of the cutting biopsy instrument of FIG. 5. For convenience of explanation, the same parts as those in the above-described embodiment are given the same drawing reference numerals and functions.

A biopsy needle set (100) of a cutting biopsy device can accommodate at least one area of tissue from a living body, for example, a human body, for biopsy.

For example, a biopsy needle set (100) can define an examination direction based on a biopsy direction (D) of a first direction (D1) or a second direction (D2). Specifically, the biopsy needle set (100) is moved in the first direction (D1) with respect to a living body, for example, the epidermis of a human body, so as to penetrate an area of the epidermis, be inserted into the epidermis, and reach an internal area of the living body where a biopsy is desired, remove a desired tissue, and move in the second direction (D2) so as to come out of the epidermis, so that a biopsy can be easily performed on the tissue removed by the biopsy needle set (100).

The biopsy needle set (100) of the present embodiment may include an inner needle part (110), an outer needle part (120), and a moving block (200). Although not shown in the drawing, the inner needle part (110), the outer needle part (120), and the moving block (200) may be accommodated in a housing (not shown).

The length of the outer needle (120) may be shorter than the length of the inner needle (110).

Since the configuration of the outer lining (120) and the inner lining (110) can be selectively applied to the above-described embodiments, a description of the specific configuration is omitted.

As shown in Fig. 5, when the outer needle part (120) is advanced to the maximum in the first direction (D1), which is the forward direction, the needle set (100) can be advanced to move to the area where the extraction is desired. Then, as shown in Fig. 6, the outer needle part (120) is moved in the backward direction (D2) so that the extraction groove of the inner needle part (110) is exposed to receive and extract tissue. At this time, as an optional embodiment, the extraction of tissue can be facilitated by generating negative pressure between the inside of the outer needle part (120) and the inner needle part (110).

After collecting the tissue, as shown in Fig. 5, the outer surface (120) is moved again to cover the collection groove (113), and then the needle set (100) is moved away from the tissue, and then the tissue is collected from the collection groove to perform the necessary examination.

The movement of the outer piercing part (120) relative to the inner piercing part (110) can be performed using the moving block (200). The inner piercing part (110) can be positioned to penetrate the outer piercing part (120) and the moving block (200), and the movement of the outer piercing part (120) and the moving block (200) can be made without interference by the inner piercing part (110).

The moving block (200) can be fixed through a fixed point (HST), through which the outer needle part (120) can maintain the same end as the inner needle part (110) without passing the inner needle part (110) when moving to the maximum in the first direction (D1), and in this state, the target for tissue extraction, for example, the epidermis of a human body, can be integrally pierced.

As an optional embodiment, such a fixed point (HST) may be placed in an area inside a housing that accommodates at least an area of the needle set (100).

In addition, by moving the movable block (200) in the second direction (D2), the outer needle part (120) can be easily moved backward to expose the collection groove of the inner needle part (110), and after the tissue is collected, the movable block (200) can be moved in the first direction (D1) again to allow the outer needle part (120) to move forward to cover the collection groove (113). According to one embodiment, the inner needle part (110) can be fixedly installed in the housing, and the movement in the first direction (D1) and/or the second direction (D2) can be limited.

The exposure of the harvesting groove (113) is not necessarily limited to this, and the harvesting groove (113) may be exposed from the outer needle part (120) by the inner needle part (110) moving in the first direction (D1) while the moving block (200) is fixed. For this purpose, although not shown in the drawing, according to another embodiment, the inner needle part (110) may also be connected to a separate moving block, and thus may be moved in the first direction (D1) and/or the second direction (D2) by the user's manipulation. Even in this embodiment, the outer needle part (120) eventually covers the exposed harvesting groove (113) by advancing in the first direction (D1), thereby cutting the tissue settled in the harvesting groove (113).

The biopsy needle set of the present embodiment may include an inner needle part and an outer needle part, and the outer needle part may be easily moved. Through this, tissue for biopsy may be easily collected using the biopsy needle set. Although not shown in the drawing, the moving block (200) to which the outer needle part (120) is coupled may be coupled with a separate spring, and the advancement of the outer needle part (120) in the first direction (D1) may be made possible by releasing the elastic force of the condensed spring by the user's manipulation.

Even in this structure, by applying the embodiments of FIGS. 3 and 4 described above, it is possible to prevent the tip area (1211) from being damaged due to the operation of the outer surface (120), and to ensure that no problems occur even if the procedure is performed multiple times.

FIG. 7 illustrates a part of an outer needle part (120) according to another embodiment, and illustrates another example of a friction reduction part (R2). That is, as described above, the needle set (100) according to the embodiment may include a friction reduction part in an overlapping area according to the relative movement of the inner needle part and the outer needle part, and according to another embodiment, the friction reduction part (R2) may be positioned at an end of the outer needle part (120) in the second direction (D2). The embodiment of the outer needle part (120) may include a protrusion (123) protruding in an outer diameter direction from one end of the outer needle body (122) as the friction reduction part (R2). The protrusion (123) may be positioned at the end of the outer needle part (120) in the second direction, and may have a second inner diameter (d2) that is longer than the first inner diameter (d1) of the outer needle body (122).

Accordingly, the inner needle (110) penetrating the outer needle (120) can be further separated from the outer needle (120) at the portion where the protrusion (123) is formed. In other words, the gap between the inner needle (110) and the protrusion (123) can be formed wider than the gap between the inner needle (110) and the outer needle body (122).

By forming the protrusion (123) in this way at the second direction end of the outer needle part (120), when the inner needle part (110) and the outer needle part (120) move relative to each other, the second direction end of the outer needle part (120) that intersects the inner needle part (110) is minimized from contacting the inner needle part (110), and the mutual sliding movement of the inner needle part (110) and the outer needle part (120) can be made smoother. Accordingly, the user can minimize the feeling of friction that occurs when the inner needle part (110) and the outer needle part (120) slide relative to each other, and can feel that the procedure is being performed smoothly.

These protrusions (123) can be formed in a shape that gradually expands in the outer diameter direction from the second direction (D2) end of the outer needle part (120). Therefore, according to one embodiment, the protrusions (123) can be formed to be inclined in the outer diameter direction from the outer needle body (122).

According to one embodiment, the protrusion (123) can be formed in a manner that expands the diameter of the second end of the outer portion (120).

The outer portion (120) having such a protrusion (123) can be formed to protrude in the second direction (D2) from the second direction (D2) end (201) of the moving block (200) when combined with the moving block (200) as shown in Fig. 8. According to this structure, the hole of the moving block (200) into which the outer portion (120) is inserted can have a tubular shape with the same diameter.

The outer portion (120) having the protrusion (123) may have a structure in which the second direction (D2) end (201) of the moving block (200) and the protrusion (123) are formed on the same straight line, as shown in Fig. 9. According to this structure, the hole of the moving block (200) into which the outer portion (120) is inserted may have a tubular shape that is partially expanded as it goes in the second direction (D2).

Each of the embodiments described above can be implemented independently, but it goes without saying that the structure of each embodiment can be applied in combination to other embodiments.

Although the present invention has been described with reference to the embodiments shown in the drawings, these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible. Accordingly, the true technical protection scope of the present invention should be determined by the technical idea of the appended claims.

The specific implementations described in the examples are only examples and do not limit the scope of the examples in any way. In addition, if there is no specific mention such as “essential,” “important,” etc., it may not be a component absolutely necessary for the application of the present invention.

The use of the term "above" and similar referential terms in the specification of the embodiments (especially in the claims) may be in both singular and plural. In addition, when a range is described in the embodiments, it is intended that the invention includes the application of individual values belonging to the range (unless otherwise stated), and each individual value constituting the range is described in the detailed description. Finally, unless the order is explicitly stated or otherwise stated in the steps constituting the method according to the embodiments, the steps may be performed in any suitable order. The embodiments are not necessarily limited by the order in which the steps are described. The use of all examples or exemplary terms in the embodiments is merely intended to describe the embodiments in detail, and the scope of the embodiments is not limited by the examples or exemplary terms, unless otherwise stated by the claims. In addition, those skilled in the art will recognize that various modifications, combinations, and changes may be made according to design conditions and factors within the scope of the appended claims or their equivalents.

Claims (6)

A needle set comprising a lower portion and an upper portion through which the lower portion passes and which is adapted to move relatively to the lower portion;
A moving member coupled to the above-mentioned outer portion and moving the above-mentioned outer portion along the biopsy direction;
The above inner portion is formed to penetrate the outer portion,
The main body of the needle;
A collection groove formed in one area of the above-mentioned needle body; and
Including a head portion connected to the above-mentioned main body and inclined toward the area for biopsy;
Further including a friction reduction part in the overlapping area according to the relative movement of the above inner and outer lining parts,
The above-mentioned extraction groove is formed in a groove shape that is drawn inward from the surface of the above-mentioned needle body,
A harvesting surface including a surface on which the target tissue is settled and extending in the longitudinal direction of the main body of the needle; and
Including a support wall provided to have a slope on one end of the above-mentioned extraction surface;
The above friction reducing member is a cutting biopsy instrument located on the support wall of the above collection groove. delete delete delete In the first paragraph,
A cutting biopsy device, wherein the support wall includes a plurality of inclined surfaces having different angles with respect to the sampling surface. In the first paragraph,
A cutting biopsy device, wherein the friction reducing portion is located at an end of the outer surface portion.

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