KR102264136B1 - A double cylinder structure type biopsy syringe having a rotating needle - Google Patents

Abstract

The objective of the present invention is to provide a technology which increases a cutting force when body tissue cutting and suction are conducted through a syringe for a biopsy so as to prevent damage to the tissue during the suction of the body tissue, increase a collection rate, and allow for stable collection. To this end, according to an embodiment of the present invention, a syringe for a biopsy including a rotating needle of a double cylinder structure comprises: a needle configured to be able to rotate, having a suction hole formed at least in a side surface, having a cutting blade formed on a side surface facing a rotation direction among side surfaces in a longitudinal direction of the suction hole, and configured to suck a specimen cut according to rotation of the cutting blade through the suction hole and a hollow portion therein according to negative pressure; a first cylinder having a first accommodation space formed therein and both end sides formed in a longitudinal direction to be opened; and a second cylinder including a first opening which is formed in one end side in a longitudinal direction and to which the hollow portion of the needle is connected and a second opening which is formed in the other end side in a longitudinal direction and through which a plunger is closely inserted, and a second accommodation space formed therein to accommodate the plunger and guide a longitudinal movement of the plunger, and rotating together with a needle while fixed together with the needle such that when the plunger moves in a longitudinal direction, the plunger applies negative pressure to the needle so as to enable tissue suction and discharge of tissue in an internal space defined by the first opening and the plunger. The second cylinder is rotatably fixed into the first cylinder, and includes a rotation coupling part which enables the second cylinder to rotate in an axial direction as the plunger moves longitudinally in the second accommodation space.

Description

A syringe for biopsy including a rotating needle with a double cylinder structure {A DOUBLE CYLINDER STRUCTURE TYPE BIOPSY SYRINGE HAVING A ROTATING NEEDLE}

The present invention relates to a syringe used for biopsy as a specimen instrument of biological tissue, and a cutting edge for precisely cutting biological tissue is formed on the side so that biological tissue can be cut very precisely through a rotatable needle In the syringe that does this, the needle can be rotated through the movement of the plunger to prevent excessive damage to the biological tissue to be aspirated in the collection of biological tissue that requires precise and sophisticated manipulation and to increase the collection yield at the same time It relates to an accurate and safe biopsy syringe that allows for fine manipulation.

In general, for the examination of a living tissue, a method for injecting an instrument capable of harvesting a living tissue into a living tissue and collecting a tissue to be tested among the living tissues is used. In the case of fine needle aspiration biopsy, a general syringe without a separate cutting edge is used.

Therefore, general needles are formed on the outer end of the plunger for general purpose such as injecting drugs or sucking body fluids, and the operator holds the plunger and moves the plunger forward and backward to collect tissue. Accordingly, when performing a biopsy, the yield of the sample to be collected is lowered because simple suction is performed rather than cutting the biological tissue after cutting, and also, the sample tissue is destroyed by the needle tip, resulting in non-diagnostic or inaccurate diagnosis. become a major factor in causing Accordingly, technologies such as Korean Patent No. 10-1143929 are being developed in order to improve the suction operation method of the existing syringe. The above-described conventional technology proposes a structure in which a plunger operation guide bar is formed to extend to a moving plate formed on the outer end side of the plunger, and the plunger is moved backward by using the thumb from the suction hole side.

However, this technology is merely a technology that allows suction while maintaining the gripping state, and eventually, when the living tissue is sucked through the sharp invasive slope of the needle tip, the aspirated biological tissue is destroyed by the needle tip or precisely the tissue. The problem of not being able to aspirate has not been solved.

Accordingly, the present invention provides a syringe capable of very precisely cutting living tissue through a rotatable needle while a cutting edge for precisely cutting biological tissue is formed on the side, and rotating the needle through movement of the plunger The purpose of the present invention is to provide a technology that can precisely cut and aspirate the biological tissue to be sucked by the rotation of the needle during movement while applying negative pressure to the plunger using a needle with a cutting edge on the side. There is this.

In order to achieve the above object, a biopsy syringe including a rotatable needle of a double cylinder structure according to an embodiment of the present invention is configured to be rotatable, a suction hole is formed on at least a side surface, and the suction hole a needle having a cutting edge formed on a side opposite to the rotational direction among the longitudinal sides of the needle, configured to suck the sample cut according to the rotation of the cutting edge through the suction hole and the hollow inside according to the negative pressure; a first cylinder having a first accommodating space therein and having both ends in the longitudinal direction open; and a first opening to which the hollow part of the needle is connected is formed at one end in the longitudinal direction, and the plunger is closely inserted through the second opening at the other end in the longitudinal direction, and when the plunger moves in the longitudinal direction, the needle In order to apply negative and positive pressure to the first opening and to enable tissue suction and discharge in the internal space defined by the first opening and the plunger, a second receiving space for accommodating the plunger and guiding the longitudinal movement of the plunger is inside a second cylinder formed in, fixed to the needle and rotating together; the second cylinder is rotatably fixed inside the first cylinder, and the plunger is longitudinally positioned in the second receiving space It is characterized in that a rotation coupling portion is formed so that the second cylinder rotates in the axial direction as it moves.

The rotation coupling part includes a guide line in a spiral shape formed on the outer surface of the second cylinder, and the plunger is in close contact with the inner wall of the second accommodation space so that the air is blocked in the second accommodation space based on the plunger. A separate plunger cap is formed on one end, and in one region of the other end exposed to the outside, at least one is formed to extend integrally with the plunger. As a result, the first cylinder and the second A first arm extending in the longitudinal direction so as to be inserted into the gap of the cylinder, and having a contact portion in press contact with the guide line at the extended end side, when the plunger moves in the longitudinal direction, the length of the first arm It is preferable that the external force according to the direction movement is transmitted to the guide line and is configured to be converted into an axial rotational force of the second cylinder according to the spiral shape of the guide line.

It is preferable that the guide line is formed in an engraved or embossed structure, and a region in which the first arm is in pressure contact with the guide line is formed to have an embossed or embossed structure corresponding to the engraved or embossed structure.

The plunger is formed at a position different from the position in which the first arm is formed among one region of the other end side of the plunger, and at least one is formed to extend integrally with the plunger, and the formation direction angle is changed as a result of the formation of the first It is formed extending in the longitudinal direction so as to be inserted into the gap between the cylinder and the second cylinder, and is positioned between the gap of the first cylinder and the second cylinder to prevent movement in a direction perpendicular to the axial direction of the second cylinder It is preferable to further include a second arm.

A ring-shaped groove is formed on the outer surface of one region on the side of the first opening of the second cylinder, and a ring-shaped rib inserted into the groove is formed on the inner surface of the first cylinder on the side of the first opening, The second cylinder and the first cylinder are fixed to prevent movement and separation in the longitudinal direction through the engagement of the groove and the rib, and the second cylinder is configured to rotate in the axial direction with respect to the first cylinder it is preferable

At least one of the groove and the rib may be provided with a contact surface member for reducing friction caused by contact between the groove and the rib.

In the needle, the suction hole is preferably formed while forming an inclination with the longitudinal axis along the outer surface of the needle.

According to the present invention as described above, a spiral rotation coupling portion is formed on the outer surface, and since the spiral and the plunger are bound by the first arm, when the plunger moves in the longitudinal direction for suction, the spiral and the first arm are in contact This causes the second cylinder to rotate.

At this time, since the needle fixedly coupled to the second cylinder rotates together, just moving the plunger in the longitudinal direction as in the operation of a general syringe, the needle with a cutting edge formed on the side rotates while precisely cutting living tissue, It functions to suck the living tissue by generating negative pressure according to the longitudinal movement of the plunger.

Through this, since the biological tissue to be aspirated is precisely cut in the collection of biological tissue that requires precise and sophisticated manipulation, damage to the biological tissue can be minimized and the extraction yield can be greatly increased, and the same operation method as a general syringe This can greatly increase the operator's ease of operation of the syringe, thereby enabling safe, accurate and efficient operation.

1 is a perspective view of a biopsy syringe including a rotary needle having a double cylinder structure according to an embodiment of the present invention.
2 and 3 are separate views of each part of a biopsy syringe including a rotary needle having a double cylinder structure according to an embodiment of the present invention.
4 and 5 are side cross-sectional views for explaining an example of operation of a biopsy syringe including a rotary needle of a double cylinder structure according to an embodiment of the present invention.
6 and 7 are views showing an example of a rotary needle according to an embodiment of the present invention.

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 the various methods in principles of various aspects may be employed, and the descriptions set forth are intended to include all such aspects and their equivalents.

As used herein, “embodiment”, “example”, “aspect”, “exemplary”, etc. may not be construed as an advantage or an advantage in any aspect or design described herein 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 first, second, 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 those commonly understood by those of ordinary skill in the art to which the present invention belongs. have the same meaning. 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 perspective view of a biopsy syringe including a rotary needle of a double cylinder structure according to an embodiment of the present invention, FIGS. 2 and 3 are a double cylinder structure including a rotary needle according to an embodiment of the present invention Separate views of each part of the biopsy syringe, FIGS. 4 and 5 are side cross-sectional views for explaining an operation example of a biopsy syringe including a double-cylinder structure rotary needle according to an embodiment of the present invention, FIGS. 6 and 7 is a view showing an example of a rotary needle according to an embodiment of the present invention.

Referring to the above drawings at the same time, a biopsy syringe including a rotary needle of a double cylinder structure according to an embodiment of the present invention, the needle 10, the first cylinder 20, the second cylinder 30 and It is characterized in that it is composed of a plunger (40).

The needle 10 is specifically configured to be rotatable, and a suction hole is formed on at least a side surface, and a cutting edge is formed on a side opposite to the rotation direction among the longitudinal side surfaces of the suction hole 13 , It is configured to suck the sample cut according to the rotation of the suction hole 13 and the hollow part inside according to the negative pressure.

At this time, configured to be rotatable is a virtual axis shared by the needle 10, the first cylinder 20, the second cylinder 30 and the plunger 40, for example, the axis indicated by the dashed-dotted line in FIG. It means rotating around the center. In addition, the formation of the cutting edge on the side opposite to the rotation direction means that the plunger 40 is directed from the inside of the second cylinder 30 to the outside in order to form a negative pressure through interlocking with the plunger 40 to be described later, that is, It means that the cutting edge is formed on the side opposite to the rotation direction of the needle 10 interlocked therewith when moving in the opposite direction to the direction toward the needle 10 as described above. Examples of this are shown in FIGS. 6 and 7 .

Referring to the above-mentioned drawings, specifically FIGS. 6 and 7, etc., in order to precisely cut biological tissue according to rotation by forming a cutting edge on the side, and at the same time to suck the cut body tissue into the hollow part, the above-mentioned needle As a specific example of (10), the needle 10 has a suction hole 13 formed on at least a side surface, and a cutting edge 14 is formed on the side opposite to the rotation direction among the longitudinal side surfaces of the suction hole 13. The length of the plunger 40, which precisely cuts the sample located near the needle tip 11 according to the rotation of the cutting edge 14 without damaging the sample, and causes the cut sample to rotate the needle 10 A needle fixedly connected so that the negative pressure generated in the second accommodating space 300 of the second cylinder 30 generated according to the movement of the second cylinder 30 communicates with the second accommodating space 300 of the second cylinder 30 and the flow of the fluid. It is configured to suck through a hollow part, specifically, a hollow part inside the cylindrical needle body 12 as it is delivered to (10).

At this time, as shown in (a) of FIG. 6 , the suction hole 13 and the cutting edge 14 on the side of the needle 10 may be formed parallel to the central axis in the longitudinal direction. In this case, it is easy to manufacture the needle 10, and there is an advantage in that the sample can be cut relatively precisely.

However, in another embodiment of the present invention, as shown in Fig. 6 (b), the suction hole 13-1 and the cutting edge 14-1 on the side of the needle 10-1 are the needle 10-1 ) is formed to form an inclination with the longitudinal axis along the outer surface, and may be formed to have a screw shape when viewed from the outside.

Referring to FIGS. 7 (a) and (b), which is a detailed view of FIG. 6 (b) described above, the suction hole 13-1 and the cutting edge 14-1 of the needle 10-1 are In the case of forming an inclination with the longitudinal axis along the outer surface of (10-1), the hole-side hollow portion 15 may be formed along the longitudinal direction, such as 15-1, 15-2, 15-3, etc. in cross section. connect. That is, as shown in (b) of FIG. 7 , the cross section of the hole-side hollow portion 15 of the suction hole 13-1 along the longitudinal direction is gradually increasing in the outer periphery thickness of the opposite side of the suction hole 13-1 ?邨Tip 層Money? can be configured.

When configured in this way, while the specimen is cut by the screw-shaped cutting edge 14-1, according to the shape of the hollow portion 15, such as each of the cross-sections 15-1, 15-2, 15-3 described above. The negative pressure generated as described above as the needle 10-1 rotates without damaging the specimen according to the structural feature that the cross-sections 15-1, 15-2, and 15-3 gradually become wider while the negative pressure fluctuates. This has the effect of naturally moving backwards.

Through this, as the plunger 40 is moved in the direction in which the negative pressure is generated, as will be described later, the needle 10 is interlocked with it and rotates, so that the cutting edge rotates in the direction toward the living tissue to precisely cut the living tissue. will function In the following description, various types of needles 10 are shown in each drawing, but this is only an illustration of various types in the illustration for description of each configuration, and the cutting edges 14 and 14-1 of the above-described side ) will be understood as a concept including embodiments of

The suction of the body tissue through the suction hole 13 and the hollow inside according to the negative pressure is as follows. First, as described below, the needle 10 has a hollow part therein so that the fluid moves, but the hollow part is electrically connected to the second accommodation space 300 formed in the second cylinder 30 so that the fluid moves. This is preferable. this?? The suction hole 13 is configured to communicate with the hollow part therein so that a fluid, preferably a body tissue, can be moved.

Through this, when a negative pressure is formed according to the longitudinal movement of the plunger 40, preferably in the direction opposite to the needle 10, the negative pressure is generated in the hollow portion of the needle 10 and the suction hole 13 ), and thus the body tissue cut by the cutting edge positioned in the suction hole may be moved in the order of the suction hole 13 , the hollow part and the second accommodation space 300 . At this time, the body tissue cut according to the negative pressure may be stored in the second accommodating space 300 itself, or stored in the needle cap 16 or the hollow region for sealingly connecting the hollow part and the second accommodating space 300 .

When body tissue is stored in the needle cap 16, the body tissue can be recovered by removing the needle cap 16 after suction and popping, otherwise, the plunger 30 is moved in the longitudinal direction toward the needle. By moving it to generate positive pressure in the second accommodation space 300 , the body tissue may be discharged through the suction hole 13 to be recovered.

On the other hand, the first cylinder 20 has a configuration in which the first accommodating space 200 is formed therein, and both end sides in the longitudinal direction are opened. Specifically, the first cylinder 20 means a configuration that serves as a barrel that allows the user to grip while the second cylinder 30 rotates regardless of the user's grip, and the second cylinder ( 30) means a configuration that defines the outer shape of fixing it. On the other hand, both open ends of the plunger for the operation of the plunger 40 as shown in one area 22 or FIG. 2 for fixing the second cylinder 30 while the second cylinder 30 is exposed to the outside. The head 43 may be configured such that an open area of the area exposed to the outside of the handle 21 side of the first cylinder 20 is formed.

The second cylinder 30 has a first opening 31 to which the hollow portion of the needle 10 is connected to one end in the longitudinal direction is formed, and through a second opening (no identification number) on the other end in the longitudinal direction. The plunger 40 is configured to be inserted in close contact, and when the plunger 40 moves in the longitudinal direction, negative and positive pressure is applied to the needle 10 to the first opening 32 and the plunger 40 and the side wall of the second cylinder 30 . In order to enable tissue suction and discharge in the internal space defined by the second accommodating space 300 for accommodating the plunger 40 and guiding the longitudinal movement of the plunger 40 at the same time, is formed therein, It is fixed with the needle 10 and is configured to rotate together. That is, the region to which the above-described negative and positive pressure is applied may be understood to mean the second accommodation space 300 defined by the sidewalls of the first opening 43 , the plunger 40 and the second cylinder 30 . . On the other hand, the second accommodating space 300 may be understood to mean the entire hollow region of the second cylinder 30 in which the plunger 40 can be moved in other meanings.

As shown in FIG. 2 , the needle 10 may be strongly fixed to the second cylinder 30 by fitting the needle cap 16 to the protruding region 31 in which the first opening 32 is formed. At this time, the needle cap 16 and the protruding region 31 are not specifically shown in FIG. 2 , but by forming a simple fitting structure or a screw coupling structure, they may be configured to be coupled and fixed to each other in various ways.

The second cylinder 30 is rotatably fixed inside the first cylinder 20 for suction of body tissue and rotation of the needle 10 as described above, and at the same time as a function of forming a negative pressure, the plunger 40 ) It is preferable that a rotation coupling part (no identification number) is formed so that the second cylinder 30 rotates in the axial direction as the second accommodating space 300 moves in the longitudinal direction.

The rotation coupling part means a kind of power transmission member for performing a function of converting the longitudinal movement force of the plunger 40 into the rotation force of the second cylinder 30 . For example, when the user applies an external force to push in the plunger head 43 while holding the outer surface through the handle 21 and the outer surface of the first cylinder 20, the guide of the above-described second accommodation space 300 This causes the plunger 40 to move in the longitudinal direction. At this time, by the rotation coupling part, the external force for the movement in the longitudinal direction is converted into the rotational force of the second cylinder 30, so that the second cylinder 30 rotates when the plunger 40 moves in the longitudinal direction. is driven Of course, according to the moving direction of the plunger 40, the direction of the rotational force will also vary.

As a specific example, as shown in FIGS. 2 to 5 , the rotation coupling part may include a guide line 33 in a spiral shape formed on the outer surface of the second cylinder 30 . At this time, in order to apply an external force in the longitudinal direction of the plunger 40 to the guide line 33 , the plunger 40 is in close contact with the inner wall of the second accommodation space and the second accommodation space 300 and A plunger cap 48 that is divided to block external air is formed on one end, and in one area of the other end exposed to the outside, at least one is formed to extend integrally with the plunger 40, the angle of the formation direction is changed As a result, the first arm is formed extending in the longitudinal direction to be inserted into the gap between the first cylinder 20 and the second cylinder 30 , and a contact portion 47 that is in press contact with the guide line 33 is formed on the extended end side. (45, 46).

That is, as shown in the above-mentioned drawings, the rotation coupling portion may be a guide line 33 which is an inclined spiral groove formed in the second cylinder 30 . In this case, the guide line 33 may have an engraved or embossed structure. At this time, since the contact portion 47 is in press contact with the guide line 33 to transmit the external force in the longitudinal direction and at the same time to increase the external force transmission efficiency, separation from the guide line 33 must be prevented, so that the intaglio or Corresponding to the embossed structure to have an embossed or engraved structure, it may be configured to be disposed in a fit-fitting form to the guide line 33 . That is, in FIGS. 2 to 5 , the guide line 33 is shown as an intaglio such as a groove, and the contact part 47 is shown as a simple protruding embossed configuration, and this example is of the guide line 33 and the contact part 47 described above. As an example, it may be included in the embodiment of the present invention, and as another example, when the guide line 33 is configured in an embossed structure such as a rib, the contact portion 47 may be configured in an engraved structure in which a groove is formed in the protruding area. .

The first arms 45 and 46 may be configured to have different lengths in the longitudinal direction according to the formation positions of each arm as shown in FIGS. 2 to 5 by the configuration of the spiral guide line 33 . In addition, although the first arms 45 and 46 are shown as two in the drawings of the present invention, they may be configured to be more than that number according to each embodiment of the present invention.

The first arms 45 and 46 are integrally formed with the plunger 40 as described above and move together according to the longitudinal movement of the plunger 40, so that the guide line 33 in close contact moves in the corresponding longitudinal direction. It is configured to transmit an external force according to In addition, it may be configured so as not to affect the second cylinder 30 and the second accommodating space 300 by the formation of the first arms 45 and 46 . For this purpose, at least one of the first arms 45 and 46 is extended from the short side of the plunger 40, such as the plunger head 43, as shown in FIGS. 2 to 5 and as described above, for example, orthogonal, etc. As the formation direction angle is changed in the direction, the main part extends in the longitudinal direction so as to be inserted into the region of the first accommodation space 200 corresponding to the gap between the first cylinder 20 and the second cylinder 30. can be formed. As a result, the contact portion 47 of the short side of the first arms 45 and 46 may be configured to be in press contact with the guide line 33 positioned in the above-described gap.

According to this configuration, when the plunger 40 moves in the longitudinal direction, the external force according to the longitudinal movement of the first arms 45 and 46 is transmitted to the guide line 33 , and according to the spiral shape of the guide line 33 , the As the axial rotation force of the two cylinders 30 is converted, the second cylinder 30 is configured to rotate when the plunger 40 moves in the longitudinal direction. Preferably, when the plunger 40 moves in the direction D1 opposite to the needle 10 side, that is, when a negative pressure is formed in the second receiving space 300, the cutting edge 14 of the needle 10 described above. , 14-1) is rotated in a direction that can cut the tissue, that is, so that the cutting edges 14 and 14-1 can rotate in the direction of rotation R1 toward the suction holes 13 and 13-1. It is configured so that it can be sucked at the same time as cutting the living tissue.

On the other hand, when only the first arms 45 and 46 are present in the plunger 40, the second cylinder 30 is moved in a direction orthogonal to the axial direction, that is, in the lateral direction, due to its shape and structure, so that the entire syringe is stable. operation may be adversely affected. This phenomenon can be solved by a member that can fill the space between the first cylinder 20 and the second cylinder 30 with respect to the first accommodating space 200 corresponding to the above-described gap.

To this end, in each embodiment of the present invention, the plunger 40 is the first arm 45 of the other short side of the plunger 40 , that is, one area of the same short side as the short side on which the first arms 45 and 46 are formed. , 46) is formed in a position different from the formed position, that is, at a different position in the circumferential direction of the plunger head 43, at least one extending integrally with the plunger 40 in the same way as the first arms 45 and 46. , as the result formed while the angle of the formation direction is changed, is formed extending in the longitudinal direction so as to be inserted into the gap of the first cylinder 20 and the second cylinder 30 like the first arms 45 and 46, the first cylinder 20 and a second arm 44 positioned between the gap of the second cylinder 30 and preventing movement in a direction perpendicular to the axial direction of the second cylinder 30 as described above.

That is, as shown in FIGS. 2 to 5 , the second arm 44 is not pressed into contact with the guide line 33 , but is simply positioned in the first cylinder 20 and the second cylinder 30 so that the second cylinder (30) may be understood as a configuration that performs a function to prevent shaking. Accordingly, the shape of the second arm 44 may also be formed in various shapes unlike those shown in FIGS. 2 to 5 .

On the other hand, for stable rotation of the above-described second cylinder 30, the first cylinder 20 needs to be stably fixed according to the user's grip regardless of the rotation of the second cylinder 30, and at the same time, The second cylinder 30 should be configured to rotate relative to the first cylinder 20 . That is, the second cylinder 30 and the first cylinder 20 should be configured to rotate while being fixed to each other. A part of the fixing function may be stably performed by the above-described second arm 44 .

To perform this function, in each embodiment of the present invention, as shown in FIGS. 2 to 5 , a ring-shaped groove (identification number) on the outer surface of one area on the side of the first opening 32 of the second cylinder 30 None) is formed, and the first opening side end side of the first cylinder 20, that is, the second cylinder 30 is exposed to the outside and at the same time fixed to the inner surface of the region 22 in the form of a ring inserted into the groove By forming the ribs (no identification number) of the second cylinder 30 and the first cylinder 20 through the engagement of the grooves and the ribs to prevent movement and separation in the longitudinal direction, while being fixed, by sliding of the grooves and the ribs It is preferable that the second cylinder 30 is configured to be axially rotatable with respect to the first cylinder 20 .

That is, the first cylinder 20 and the second cylinder 30 are fixed and rotatable to each other at the same time due to the sliding structure of the groove and the rib and the non-adhesion of both structures, and accordingly, the second cylinder 30 and the first cylinder 20 are fixed to each other and are configured to rotate at the same time, and the user grips the first cylinder 20 and simultaneously moves the plunger 40 in the longitudinal direction to move the plunger 40 in the longitudinal direction to the second cylinder ( 30) and the needle 10 are rotated, and as the needle 10 is rotated according to the side formation of the cutting edges 14 and 14-1 of the needle 10, the biological tissue is precisely cut and simultaneously sucked into the inside. it will be done

At this time, in order to minimize damage due to friction between the groove and the rib, in another embodiment of the present invention, at least one of the groove and the rib is preferably provided with a contact surface member for reducing friction caused by the contact between the groove and the rib. something to do. In this case, the contact surface member will be understood to mean a soft member capable of reducing friction, or various additional components capable of offsetting frictional force, such as a bearing.

As described above, although the embodiments have been described with reference to the limited embodiments and drawings, those skilled in the art will understand that various modifications and variations are possible from the above description. Terms such as "include", "comprise" or "have" described above mean that a component without a particularly opposing description may be embedded, so other components are not excluded. It should be construed as being able to include more. In addition, the protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

Claims (7)

It is configured to be rotatable, and a suction hole is formed on at least a side surface, and a cutting edge is formed on a side opposite to the rotation direction among the longitudinal side surfaces of the suction hole, so that the sample cut according to the rotation of the cutting edge is subjected to negative pressure. a needle configured to suck through the suction hole and a hollow part therein;
a first cylinder having a first accommodating space therein and having both ends in the longitudinal direction open; and
A first opening to which the hollow part of the needle is connected is formed at one end in the longitudinal direction, and the plunger is closely inserted through the second opening at the other end in the longitudinal direction, and when the plunger moves in the longitudinal direction, it is connected to the needle. In order to apply negative and positive pressure to enable tissue suction and discharge in the internal space defined by the first opening and the plunger, a second receiving space for accommodating the plunger and guiding the longitudinal movement of the plunger is provided therein A second cylinder formed and fixed with the needle to rotate together; including,
The second cylinder is
A double cylinder structure, characterized in that a rotation coupling part is formed so as to be rotatably fixed inside the first cylinder and to rotate the second cylinder in the axial direction as the plunger moves in the longitudinal direction in the second accommodation space. A biopsy syringe comprising a rotating needle.
According to claim 1,
The rotation coupling part,
Including a guide line in the form of a spiral formed on the outer surface of the second cylinder,
The plunger is
A plunger cap in close contact with the inner wall of the second accommodating space and dividing the second accommodating space based on the plunger to block air is formed at one end, and in one region of the other end exposed to the outside, the plunger is integral with At least one of the extensions is formed to extend in the longitudinal direction so as to be inserted into the gap between the first cylinder and the second cylinder as a result of being formed while the angle of the formation direction is changed, and the extended end side has a contact portion that is pressed into contact with the guide line. Including; a first arm formed with
When the plunger moves in the longitudinal direction, the external force according to the longitudinal movement of the first arm is transmitted to the guide line, and is configured to be converted into an axial rotational force of the second cylinder according to the spiral shape of the guide line. A biopsy syringe comprising a rotating needle of a double cylinder structure.
3. The method of claim 2,
The guide line is formed in an intaglio or embossed structure,
A biopsy syringe including a rotary needle having a double cylinder structure, characterized in that the region where the first arm is in pressure contact with the guide line is formed to have an embossed or engraved structure corresponding to the engraved or embossed structure.
3. The method of claim 2,
The plunger is
It is formed in a position different from the position where the first arm is formed among one area of the other end side of the plunger, and at least one is formed to extend integrally with the plunger, and as a result of being formed while the angle of the formation direction is changed, the first cylinder and the second a second arm extending in the longitudinal direction to be inserted into the gap of the second cylinder and positioned between the gap of the first cylinder and the second cylinder to prevent movement in a direction perpendicular to the axial direction of the second cylinder; Biopsy syringe comprising a rotary needle of a double cylinder structure, characterized in that it further comprises.
According to claim 1,
A ring-shaped groove is formed on the outer surface of one region on the side of the first opening of the second cylinder, and a ring-shaped rib inserted into the groove is formed on the inner surface of the first cylinder on the side of the first opening,
The second cylinder and the first cylinder are fixed to prevent movement and separation in the longitudinal direction through the engagement of the groove and the rib, and the second cylinder is configured to rotate in the axial direction with respect to the first cylinder A biopsy syringe comprising a rotary needle of a double cylinder structure, characterized in that.
6. The method of claim 5,
At least one of the groove and the rib, a biopsy syringe comprising a rotary needle having a double cylinder structure, characterized in that a contact surface member for reducing friction caused by contact between the groove and the rib is formed.
According to claim 1,
The needle is
The suction hole, a biopsy syringe including a rotary needle of a double cylinder structure, characterized in that formed along the outer surface of the needle and the longitudinal axis inclined to form.

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