WO2019208979A1

WO2019208979A1 - Trocar

Info

Publication number: WO2019208979A1
Application number: PCT/KR2019/004786
Authority: WO
Inventors: 장동진; 노영정; 지동현; 한재형
Original assignee: 가톨릭대학교 산학협력단
Priority date: 2018-04-23
Filing date: 2019-04-19
Publication date: 2019-10-31
Also published as: KR101919441B1

Abstract

Disclosed is a trocar which is inserted in the front end to rear end direction into the surface of an object corresponding to a surgical area, the trocar comprising: a roll unit which has one end part and the other end part rolled to overlap at least partially so that the one end part covers the other end part in the circumferential direction, and which has a hollow part inside the roll unit; a first hooking unit arranged on the inner surface of the one end part of the roll unit; and a second hooking unit which is arranged on the outer surface of the other end part of the roll unit, and which can be hooked and coupled to the first hooking unit, wherein a plurality of at least one of the first hooking units and the second hooking units are spaced apart from each other along the circumferential direction, and the size of the hollow part can be adjusted by means of selective hooking and coupling between one first hooking unit and one second hooking unit.

Description

Troca

The present application relates to trocars.

Vitrectomy is an eye surgery used to treat diseases that cause retinal detachment and wrinkles, as well as vitreous bleeding and clouding resulting from various causes.

In vitrectomy, a passage is required to insert a surgical tool, a fluid injection tube to maintain eye shape and intraocular pressure, a light source to provide light, and the like. It is inserted into the back and made a passage. Through the trocar passage, surgical instruments, fluid injection tubes, light sources, and the like may be inserted into the eye as needed.

However, if it is necessary to insert a larger surgical tool, such as a bad eye condition during surgery, with the trocar corresponding to the size of the surgical tool used in the sclera, the inserted trocar should be larger. There was an inconvenience that a larger surgical instrument could be inserted only by replacing or removing the trocar with an internal diameter. However, if a trocar with a large internal diameter is inserted from the beginning and vitrectomy is not performed, the self-sealing will not be self-sealing (for reference, a trocar with an internal diameter of about 27G [gauge] may be self-sealing). As the internal diameter gradually increased to 25G, 23G, and 20G, suture was required after removal), and sutures were necessary after the operation was completed, and there was a problem that complications such as endophthalmitis may occur when leakage occurred.

Background art of the present application is disclosed in US Patent Publication No. 2008-0312662.

The present application is to solve the above-mentioned problems of the prior art, it is possible to adjust the size (inner diameter) of the inner hollow, so that even if the insertion of a larger surgical tool into the eye provides a trocar that does not need to be replaced or removed For the purpose of

However, the technical problem to be achieved by the embodiments of the present application is not limited to the technical problems as described above, and other technical problems may exist.

As a technical means for achieving the above technical problem, the trocar according to an embodiment of the present application, the one end portion and the other end portion at least partially overlap in a form in which one end portion in the circumferential direction covers the other end portion. A roll unit having a winding unit and having a hollow portion therein, a first locking unit disposed on an inner surface of one end of the roll unit, and a second locking unit disposed on an outer surface of the other end of the roll unit and capable of engaging with the first locking unit Including a unit, at least one of the first locking unit and the second locking unit is provided with a plurality of spaced intervals along the circumferential direction, the selective locking engagement of one of the first locking unit and one of the second locking unit By this, the size of the hollow portion can be adjusted.

According to one embodiment of the present application, the engagement coupling may be a one-way wedge coupling to prevent the size of the hollow portion is smaller because the overlapping area of the one end and the other end is wider.

According to one embodiment of the present application, the first locking unit has a protrusion shape projecting inwardly from the inner surface of the one end portion, the inclination of the other surface of the first protrusion toward the other end than the slope of one surface of the first protrusion that is the opposite side It is formed gently, the second locking unit has a projection shape projecting outward from the outer surface of the other end, the inclination of one side of the second projection toward the one end is formed more gently than the inclination of the other surface of the second projection that is the opposite side The inclination of the one surface of the first protrusion and the inclination of the other surface of the second protrusion may be set such that the one-way wedge coupling is performed by contact between the first surface of the first protrusion and the other surface of the second protrusion.

According to one embodiment of the present application, the distal end of the roll unit may further include a head unit provided on the outermost peripheral surface of the distal end portion to limit insertion.

According to one embodiment of the present application, the head unit may be arranged in plurality on the outermost peripheral surface at intervals along the circumference.

According to one embodiment of the present application, the inner surface of the hollow further includes an expander unit which is inserted into the inside of the hollow to apply an external force in the outward direction, the expander unit, the first block, facing the first block It may include a second block and an elastic member for elastically connecting the first block and the second block.

According to the exemplary embodiment of the present application, the first block and the second block are provided in a shape in which an expansion mechanism insertion space capable of inserting an expansion mechanism for exerting an external force in an outward direction is formed between the mutually opposing surfaces. The elastic members may be provided at both sides of the device insertion space, respectively.

According to one embodiment of the present application, the subject may be eyeball.

The above-mentioned means for solving the problems are merely exemplary and should not be construed as limiting the present application. In addition to the above-described exemplary embodiments, additional embodiments may exist in the drawings and detailed description of the invention.

According to the above-described problem solving means of the present application, by adjusting the size of the inner hollow portion by the selective locking engagement of the first locking unit and the second locking unit, there is no need to replace or remove the pre-located trocar with a trocar for the surgical tool The size of the hollow can be widened step by step, providing a wide range of applicability from small surgical instruments used for vitrectomy to large surgical instruments suitable for the surgical situation or eye condition and providing a trocar that can lead to more stable surgical progression. can do.

1 is a perspective view schematically showing a trocar according to an embodiment of the present application.

2A is a cross-sectional view illustrating a state in which the first locking unit is engaged with the second locking unit positioned closest to one end of the second circumferential direction (one end) of the second locking units.

2B is a cross-sectional view illustrating a state in which the size of the hollow part is expanded by engaging the first locking unit with the second locking unit positioned farthest from the one end in the circumferential direction (one end) of the second locking units.

2C is a cross-sectional view for explaining a structure in which an expansion limiting locking unit is provided to neighbor the first locking unit in one circumferential direction, thereby restricting the expansion of the hollow part.

FIG. 2D illustrates that the first locking ring formed on one surface of the first protrusion of the first locking unit is coupled to the second locking ring and wedge formed on the other surface of the second protrusion of the second locking unit, which is positioned last in the other circumferential direction of the second locking unit. It is a cross section for demonstrating the structure which limits a further expansion of a hollow part.

3 is a cross-sectional view schematically showing a plurality of head units arranged at intervals on the outermost circumferential surface of the distal end of the roll unit.

4 is a schematic cross-sectional view of the trocar inserted into the sclera of the eye along the line A-A shown in FIG.

5 is a schematic cross-sectional view of the expander unit.

6A is a cross-sectional view schematically illustrating a state in which the expander unit is inserted into the hollow part.

6B is a cross-sectional view schematically illustrating a state in which the size of the hollow portion is expanded by applying an external force to the inner surface of the hollow portion in an outward direction while the expander unit is inserted.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present disclosure. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted for simplicity of explanation, and like reference numerals designate like parts throughout the specification.

Throughout this specification, when a portion is "connected" to another portion, this includes not only "directly connected" but also "electrically connected" with another element in between. do.

Throughout this specification, when a member is said to be located on another member "on", "upper", "top", "bottom", "bottom", "bottom", this means that any member This includes not only the contact but also the presence of another member between the two members.

Throughout this specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding the other components unless specifically stated otherwise.

In addition, in the description of the embodiments of the present application, terms (direction, end, inner side, outer side, etc.) related to the direction or position are set based on the arrangement state of each component shown in the drawings. For example, referring to FIG. 1, the 6 o'clock position may be an outlet and the 12 o'clock position may be an inlet. In addition, the direction toward the center of the roll unit as a whole may be an inward direction, and the opposite direction may be an outward direction. For example, when referring to FIG. 6A, the direction indicated by the arrow 600 (external force in the outward direction) may refer to the outward direction, and the opposite direction may refer to the inward direction. 2A and 2B, the direction toward the end (one end) of the one end portion overlapped in the form of covering the other end portion from the outside of the other end portion of the circumferential direction extending so that the roll unit is partially overlapped is one side circumferential direction. On the contrary, the direction toward the other end of the other end is the other circumferential direction.

The present application relates to trocars.

Hereinafter, a trocar according to an embodiment of the present application (hereinafter referred to as 'bone trocar') will be described.

The trocar 1 may be an eye to which the subject is to be applied. Retinal surgery is performed when impurities such as vitreous bodies and retinas are formed. In this case, vitrectomy is commonly referred to as retinal surgery because vitrectomy is accompanied. . The trocar 1 can be used for vitrectomy, which is inserted from the tip to the distal direction with respect to the surface of the subject, such as the sclera 10 of the eye, corresponding to the surgical site. Vitrectomy typically requires two to four passages to insert surgical instruments, ocular morphology and fluid infusion tubes to maintain intraocular pressure, light sources that provide light within the eye, and the like. The trocar 1 can be applied to one or more of the passages and in particular has high applicability to the passage into which the surgical tool is inserted. This is because, since the type and size of the surgical tool may vary depending on the condition of the inside of the subject, the surgical situation, and the like, the necessity of applying a trocar capable of adjusting the size (inner diameter) of the inner hollow part is very high.

1 is a perspective view schematically showing a trocar according to an embodiment of the present application. 2A is a cross-sectional view illustrating a state in which the first locking unit is engaged with the second locking unit positioned closest to one end of the second circumferential direction (one end) of the second locking units, and FIG. It is sectional drawing which showed the state which the size of a hollow part expanded by engaging with the 2nd latching unit located farthest from one end circumferential end (one end) of a latching unit.

Referring to FIG. 1, the trocar 1 may include a roll unit 100. The roll unit 100 is inserted with respect to the surface of the object in correspondence with the surgical site, in which case the object may be an eyeball (for example, a sclera of the eyeball), and thus may be formed of a harmless material. For example, the roll unit 100 may be a material including at least one of tungsten, stainless steel, titanium, and silicon having high hardness, but is not limited thereto. The roll unit 100 may be applied with various metal materials, ceramic materials and the like used in the implant.

The roll unit 100 may be formed so that one end 110 and the other end 120 are at least partially overlapped so that one end 110 in the circumferential direction covers the other end 120. Referring to FIGS. 1, 2A, and 2B, the roll unit 100 may be wound to have a roll shape in which the other end portion 120 extends into one end portion 110 and is rolled up. The roll unit 100 may be formed outside the other end 120 so that one end 110 surrounds the outer surface of the other end 120. In addition, the roll unit 100 may have an inner surface of the one end portion 110 so that leakage does not occur through a gap (interval) generated by the inner surface of the one end portion 110 and the outer surface of the other end portion 120 overlapping each other. The outer surfaces of the other ends 120 may be manufactured to have a bend that can be in close contact with each other in a flexible manner without being spaced apart from each other. Since the first locking unit 200 and the second locking unit 300 to be described later are disposed between the one end 110 and the other end 120, the inner surface of the one end 110 and the outer surface of the other end 120 are disposed. May be spaced apart from each other by a predetermined interval.

The roll unit 100 may have a hollow portion 130 therein.

In addition, the roll unit 100 is inserted into the hollow part 130 so as to penetrate the surface of the object to form a passage (a passage having an inlet and an outlet) through which the surgical instrument can be inserted. Needles protruding into the outlet of can be used. As the tip of the needle protruding from the tip of the roll unit 100 penetrates the surface of the object (for example, the surface of the sclera 10 of the eyeball), the trocar 1 connects a passage connecting the inside and the outside of the object. Can be arranged to form. When the trocar 1 is disposed as described above, the needle inserted through the hollow part 130 may be removed.

Also, as an example, the roll unit 100 may include a valve at an outlet. The roll unit 100 is inserted into the object (eg, the sclera of the eye) to connect the inside and the outside of the object. By the way, when the object is the eyeball or the sclera of the eyeball, in order to prevent the liquid (eye-drops) to control the pressure of the eyeballs in the eyeball out of the outside through the hollow portion 130 of the roll unit 100 A valve may be disposed at the tip of 100. The valve is preferably provided in a form that can pass through the needle and the surgical instrument, to prevent the liquid from leaking inside the eyeball. The valve is capable of passing through the valve (moving through the valve) in the inlet direction from the inlet to the needle and the surgical tool is inserted into the roll unit 100, the inside of the eyeball 10 (Inside of the sclera) may be a one-way valve in which the movement from the outlet to the inlet direction in the direction of the outside of the eyeball 10 (outer of the sclera) is impossible. That is, the valve may be of a valve type such as a check valve that selectively permits only end-to-end passage and disallows end-to-end passage.

The trocar 1 is disposed on the outer surface of the first locking unit 200 and the other end 120 of the roll unit 100, which is disposed on the inner surface of the one end 110 of the roll unit 100. A second locking unit 300 capable of engaging with the locking unit 200 may be included. Referring to FIG. 1, the first locking unit 200 and the second locking unit 300 may be disposed on the inner surface of the one end portion 100 and the other end portion 120 where the one end portion 110 and the other end portion 120 overlap each other. ) May be formed. The first locking unit 200 has one end portion corresponding to an outer surface of the other end portion 120 on which the second locking unit 300 is formed so that the first locking unit 200 and the second locking unit 300 are coupled to each other. It may be formed on the inner surface of the 110, the second locking unit 300 may be formed on the outer surface of the other end portion 120 corresponding to the inner surface of the one end portion 110, the first locking unit 200 is formed. .

The first locking unit 200 and the second locking unit 300 may be manufactured by various manufacturing methods such as laser cutting and metal processing. As another example, each of the first catching unit 200 and the second catching unit 300 may be coupled to an inner surface of one end 110 and an outer surface of the other end 120 through adhesion or heat bonding with an adhesive. In addition, the first catching unit 200 and the second catching unit 300 are coated with silicon to prevent leakage between the inner surface of one end 110 and the outer surface of the other end 120. Can be.

At least one of the first locking unit 200 and the second locking unit 300 may be provided in plural numbers at intervals along the circumferential direction. For example, both the first locking unit 200 and the second locking unit 300 may be provided in plurality in intervals along the circumferential direction. As another example, the first catching unit 200 may be provided singly (one), and the plurality of second catching units 300 may be provided at intervals along the circumferential direction. On the contrary, the second catching unit 300 may be provided singly (one), and the plurality of first catching units 200 may be provided at intervals along the circumferential direction.

Each of the first locking unit 200 and the second locking unit 300 may have a shape extending in the length direction (end-end direction) of the roll unit 100 by a predetermined length. However, the present invention is not limited thereto, and each of the first locking unit 200 and the second locking unit 300 may be provided in a plurality of forms at intervals along the length direction of the roll unit 100. In addition, with respect to the position of the first locking unit 200 and the second locking unit 300 in the longitudinal direction of the roll unit 100, Figure 1, the first locking unit 200 and the second locking unit 300 ) Is shown to be provided from the end of the roll unit 100 (which may be referred to as an inlet portion which is located at the end of the 12 o'clock direction as shown in FIG. 1) and is located outside the object, but is not limited thereto. As another example, the first catching unit 200 and the second catching unit 300 may be provided at a position spaced more than a predetermined distance from the end of the roll unit 100. Such a first catching unit 200 and the second catching unit It is desirable to set the position of the 300 in a direction in which the selective expansion operation of the roll unit 100 can be made more easily.

2A and 2B, by the selective engagement of one of the first locking units 200 and one of the second locking units 300, the size of the hollow portion 130 (if the hollow portion has a circular cross section) Inner diameter) can be adjusted. The locking coupling may be a one-way wedge coupling that prevents the overlapping area between the one end portion 110 and the other end portion 120 from becoming wider and thus the size of the hollow portion 110 is smaller. By selectively engaging the first locking unit 200 and the second locking unit 300, the size of the hollow part 130 may be gradually increased. The size of the hollow part 130 may refer to the width (width) or diameter of an area surrounded by the innermost inner surface (innermost surface) of the roll unit 100. For example, referring to FIG. 2A, the hollow part 130 is formed by the inner surface of the section between the one end 110 and the other end 120 and the inner surface of the other end 120 disposed inward from the one end 110. It can be called an enclosed area (space). Also, referring to FIGS. 2A and 2B, the one-way wedge coupling may mean a coupling having one direction that restricts movement of one end 110 in one circumferential direction.

For example, referring to FIG. 2A, when one first locking unit 200 is provided and four second locking units 300 are provided at intervals along the circumferential direction, rolls out of four second locking units are provided. In the state where the second locking unit (first second locking unit) 310 and the first locking unit 200 which are located closest to the one end circumferential end of the unit 100 are engaged, the size of the hollow portion 130 is 27G. It may have the smallest size corresponding to (27 gauge). In addition, the second locking unit 310 located closest to one end of the circumferential direction of the roll unit 100 and the second locking unit (second second locking unit) 320 and the first locking unit 200 neighboring in the other circumferential direction ) In the engaged state, the size of the hollow portion 130 may have a size corresponding to 25G. Further, the hollow part 130 in a state in which the second locking unit 320 and the second locking unit (third second locking unit; 330) and the first locking unit 200 which are adjacent in the other circumferential direction are engaged. The size of may have a size corresponding to 23G. In addition, the hollow part 130 in a state in which the third locking unit 320 and the second locking unit (fourth second locking unit; 340) and the first locking unit 200 which are adjacent in the other circumferential direction are engaged. The size of may have the largest size corresponding to 20G.

2A and 2B, the first locking unit 200 has a protrusion shape projecting inwardly from the inner surface of the one end portion 110, and the inclination of the first protrusion other surface 200b toward the other end portion 120. May be formed to be gentler than the inclination of the first surface one surface (200a) that is the other side (opposite the other surface of the first projection). The first protrusion one surface 200a is a surface of the first locking protrusion 200 in which the second protrusion other surface 300b to be described later and the one-way wedge coupling are formed, and has a larger slope (large inclination) than the other surface of the first protrusion 200b. It is provided to have such a large gradient (large inclination) can implement a one-way wedge coupling. For example, one surface of the first protrusion 200a may cover an outer surface of the roll unit 100 (for example, an outer surface between one end 110 and the other end 120 and an outer surface of the other end 120). Prevents the roll unit 100 from being deformed to be more cold so that the size of the hollow portion 130 is smaller due to the inward external force caused by the elastic restoring force of the eyeball sclera applied to the outer surface of the part 110. It may be provided at an angle and shape (curvature) that can be. For example, the first protrusion one surface 200a may be perpendicular to the inner surface of the one end portion 110, or an angle formed between the inner surface of the one end portion 110 and 45 degrees (90 degrees to 45 degrees) to 135 degrees (90 degrees + 45 degrees to 45 degrees), more preferably 70 degrees or more and 110 degrees or less. Also, for example, one surface 200a of the first protrusion and the other surface 200b of the first protrusion may be planar in consideration of manufacturing convenience, but are not limited thereto, and may have a curved shape.

2A and 2B, the second locking unit 300 has a protrusion shape protruding outward from the outer surface of the other end 120, and the inclination of the second protrusion one surface 300a toward the one end 110. It may be formed more gently than the inclination of the other surface of the second projection (300b) that is the opposite surface. In addition, the second protrusion other surface 300b, which is a surface on which the one-way wedge coupling is formed, is inclined to correspond to the inclination and shape of the first protrusion one surface 200a which is in contact with the second protrusion other surface 300b to form one-way wedge coupling. And it may be provided in a shape. For example, the second protrusion other surface 300b may include an outer surface of the roll unit 100 (for example, an outer surface between one end 110 and the other end 120 and one end surrounding an outer surface of the other end 120). Prevents the roll unit 100 from being deformed to be more cold so that the size of the hollow portion 130 is smaller due to the inward external force caused by the elastic restoring force of the eyeball sclera applied to the outer surface of the part 110. It may be provided at an angle and shape (curvature) that can be. For example, the second protrusion other surface 300b is orthogonal to the inner surface of the other end portion 120, or the angle formed with the inner surface of the other end portion 120 degrees (90 degrees to 45 degrees) to 135 degrees (90 degrees + 45 degrees to 45 degrees), and more preferably 70 degrees or more and 110 degrees or less so that a stronger one-way wedge coupling can be realized. In addition, as an example, one surface 300a of the second protrusion and the other surface 300b of the second protrusion may be planar in consideration of manufacturing convenience, but are not limited thereto. Can be.

The inclination of the first projection one surface 200a and the inclination of the second projection other surface 300b may be set such that one-way wedge coupling is performed by contact between the first projection one surface 200a and the second projection other surface 200b. Can be. For example, referring to FIGS. 2A and 2B, the inclination of the first protrusion one surface 200a and the inclination of the second protrusion other surface 300b may indicate that the trocar 1 is inserted into the sclera 10 of the eyeball. When the trocar 1 is elastically restored by the sclera 10 to be elastically restored as much as at least a part of the space into which the trocar 1 is inserted, the first protrusion one surface 200a is relatively opposite to the second protrusion other surface 300b. It may be set to a steep inclination (inclination of the wedge coupling level) that can not be moved further in one circumferential direction than the second projection other surface (300b). On the other hand, the inclination of the first projection other surface (200b) and the inclination of the second projection one surface (300a) is an outer direction for expanding the size (inner diameter) of the inner hollow portion 130 of the trocar 1 seen by the expander to be described later When an external force is applied, the other side circumference of the first protrusion other surface 200b is relatively beyond the second protrusion one surface 300a of the second locking protrusion 300 which is located in the other circumferential direction. It may be set to a level of gentle inclination that can be further moved in the direction (a level of inclination that can be moved by an external force applied using an expander).

For example, referring to FIG. 2C, the expansion limiting locking unit 250 may be provided on an inner surface of one end of the roll unit 100 to neighbor the first locking unit 200 in one circumferential direction. The

second locking units

310 and 320 except for the second locking unit 340 (hereinafter referred to as 'the last second locking unit'), which are positioned last in the other circumferential direction among the plurality of second locking units 300, In order for the 330 to be moved in the one circumferential direction relatively beyond the expansion limit catching unit 250, the expansion limit catching unit 250 unconditionally restricts the movement in the one circumferential direction of the second catching unit 300. It is preferable not to be provided in the shape to make. Therefore, the protrusion other surface 250b of the expansion limiting locking unit 250 may be formed to have a predetermined oblique slope similarly to or similar to the first protrusion other surface 200b of the first locking unit 200. For example, the expansion limiting locking unit 250 may be provided in the same or similar shape as the first locking unit 200. That is, the protrusion other surface 250b of the expansion limiting locking unit 250 is any one of the plurality of second locking units 300 only when a predetermined external force 600 is applied to the inner surface of the hollow part 130 in the outward direction. Is past the expansion limit locking unit 250 may be provided with a slope (gradient) that can be moved in a relatively one circumferential direction. As such, when the expansion limiting locking unit 250 is provided, even if the last second locking unit 340 is moved to the one circumferential direction relatively past the first locking unit 200, one side circumference of the second locking unit 340 is provided. Since the additional limiting locking unit 250 is limited by the protrusion other surface 250b having a predetermined inclination, the first locking unit 200 and the last second locking unit 234 are wedge in one direction. Further expansion of the hollow portion in the engaged state (wedge engagement that prevents the hollow portion from shrinking again) may also be restricted unless a predetermined or more external force is applied.

For example, referring to FIG. 2D, each of the first protrusion one surface 200a of the first locking unit 200 and the second protrusion other surface 300b of the last second locking unit 340 may include the first locking unit 200. ) And the last second locking unit 340 may be provided in a shape that can be formed with a wedge coupling to limit the relative movement in a direction away from each other. For example, a first locking ring is formed on the first protrusion surface 200a of the first locking unit 200, and the first locking ring is formed on the other protrusion 300b of the last second locking unit 340. The wedge coupling structure may be provided in a form in which a second locking ring that can be engaged with each other through a locking coupling is formed. Also, referring to FIG. 2D, one surface of the first locking ring and the first locking unit 200 and the last second locking unit 340 may gradually move closer to each other for wedge engagement. The other surfaces of the two locking rings may be formed as oblique inclined surfaces, respectively. When the first locking unit 200 and the last second locking unit 340 are close to each other, the oblique one surface of the first locking ring comes into contact with the oblique other surface of the second locking ring. In addition, when the first locking unit 200 and the last second locking unit 340 become closer in this contact state, a wedge coupling may be formed as shown in FIG. 2D. That is, referring to FIG. 2D, the first locking unit 200 and the last second locking unit 340 are formed by the one-way wedge coupling between the first protrusion one surface 200a and the second protrusion other surface 300b. 130 may be prevented from being reduced again, and, in addition, a wedge coupling between the first locking ring formed on the first protrusion one surface 200a and the second locking ring formed on the second protrusion other surface 300b. Interlocking engagement or engaging jaw coupling) may also be prevented from further expanding the hollow portion 130. As described above, the second locking ring may be formed in the last second locking unit 340, but is not limited thereto. As another example, if necessary, a second locking ring may be formed on at least one of the

second locking units

310, 320, and 330 in addition to the last second locking unit 340.

3 is a cross-sectional view schematically showing a plurality of head units spaced apart on the outermost peripheral surface of the distal end of the roll unit, Figure 4 is a schematic cross-sectional view of the trocar inserted into the sclera of the eye along the line AA shown in FIG. to be.

3 and 4, the head unit provided on the outermost circumferential surface of the distal end portion so that insertion of the distal end portion (the inlet portion located on the outer side of the object out of the both ends in the length direction) of the roll unit 100 into the object is restricted. 400.

The outermost circumferential surface may mean an outer circumferential surface located at the outermost side of the roll unit 100. For example, referring to FIG. 2A, the outermost circumferential surface includes an outer surface (outer circumferential surface) of an area between the one end 110 and the other end 120 and an outer surface of the one end 110 surrounding the other end 120 from the outside thereof. can do. In addition, the head unit 400 may be provided in a shape protruding in the outward direction on the outermost peripheral surface of the distal end of the roll unit 100. The head unit 400 is provided with a shape and a material that supports the surface of the object and restricts movement to the inside of the object to prevent the entire trocar 1 from fully entering and removing the inside of the object. Can be.

In the manufacture of such a head unit 400, a plurality of integral coupling protrusions (studs) are provided on the outermost circumferential surface of the distal end of the roll unit 100, and moldings (for example, corresponding to the plurality of integral coupling protrusions) are performed. For example, by performing plastic molding, the roll unit 100 and the head unit 400 may be formed in a direction in which a predetermined number or more are integrated, but is not limited thereto. As another example, the head unit 400 may be provided with respect to the outermost circumferential surface of the distal end of the roll unit 100 through adhesive or thermal bonding.

In addition, considering that the roll unit 100 is a flexible material that can be deformed (moved) in a direction in which the winding is gradually released along the circumferential direction, the head unit 400 is also a roll unit 100 of the flexible material. It may be provided with a material having elasticity, plasticity or ductility that can correspond to. Accordingly, even if the size of the hollow portion 130 is sequentially increased and the shape of the roll unit 100 is sequentially deformed according to the selective coupling between the first catching unit 200 and the second catching unit 300, such deformation. As a result, the head unit 400 may not be damaged or excessive stress may be applied to the head unit 400, and the head unit 400 may be maintained in a normal state.

Referring to FIG. 3, a plurality of head units 400 may be disposed on the outermost circumferential surface at intervals along a circumference thereof.

The head portion of the conventional trocar is a shape that continuously extends along the circumferential direction of the trocar and protrudes outward like a head shape of a nail. On the other hand, in the case of the trocar 1, as described above, the roll unit 100 may be unwound in accordance with the expansion of the size of the hollow part 130, and a predetermined deformation may be generated in the roll unit 100. However, the head unit 400 is not provided as a single unitary body continuously along the circumferential direction so that the influence of the predetermined deformation may be further reduced. It may be provided in mutually independent form. For example, referring to FIG. 3, four head units 400 may be provided, but is not limited thereto.

In addition, the head unit 400 according to the degree (unwinding) of the roll unit 100 is unwound when the size of the hollow portion 130 (adjusting the overlapping area of the one end 110 and the other end 120) Since the bending of at least a part of the roll unit 100 may be alleviated (curvature increases), the compressive force may be applied to the head unit 400, and the like. As described above, due to the deformation of the roll unit 100, It may be provided with a material having elasticity to reduce or minimize the impact. However, the present invention is not limited thereto, and the head unit 400 may be provided with a material having ductility or plasticity.

5 is a cross-sectional view schematically showing an expander unit, and FIG. 6A is a cross-sectional view schematically showing a state in which the expander unit is inserted into the hollow portion, and FIG. 6B is an external force in an outward direction on the inner surface of the hollow portion in the state where the expander unit is inserted. Is a cross-sectional view schematically showing a state in which the size of the hollow portion is expanded by applying.

The trocar 1 may include an expander unit 500 inserted into the hollow part 130 to apply the external force 600 to the inner surface of the hollow part 130 in the outward direction. 5 and 6A, the expander unit 500 may be inserted into the hollow part 130 to apply or transmit an external force 600 in an outward direction to at least a portion of an inner surface of the hollow part 130. The initial size before expansion of the expander unit 500 may have a size smaller than that of the hollow portion 130 so as to be inserted into the hollow portion 130. The external force 600 in the outward direction may mean a force such that the size of the hollow portion 130 can be expanded than the previous size. For example, referring to FIG. 2A, the first locking unit 200 releases contact with the second protrusion other surface 200b of the first second locking unit 310 and removes the second second locking unit 320. 2 may refer to a force enough to move over (one slide) on one surface 200a. For example, the expander unit 500 may be made of hard silicon, a polymer material, or the like, but is not limited thereto.

5 and 6A, the expander unit 500 may include a first block 510, a second block 520 facing the first block 510, a first block 510, and a second block ( 520 may include an elastic member 530 to elastically connect. In the first block 510 and the second block 520, when an external force 600 is applied to at least a portion of the inner surface of the hollow part 130 in the outward direction, the elastic member 530 that interconnects them elastically stretches. While moving away from each other (directions opposite each other) of the outer direction. The first block 510 and the second block 520 by moving in a direction away from each other at least a part of the inner surface of the hollow portion 130 (one side of the inner surface and the other side that is opposite to the one side surface) External force may be transmitted by the expander unit 500.

The elastic member 530 may be provided at both sides of the instrument insertion space 640, respectively. Referring to FIG. 5, two elastic members 530 may be provided at both sides of the instrument insertion space 640 to connect upper and lower ends of the first block 510 and the second block 520, respectively. However, the present invention is not limited thereto, and two or more elastic members 530 may be provided in some cases. 6A and 6B, the elastic member 530 may include a second locking unit 310 in which the first locking unit 200 is located closest to one end of the second locking unit 300 in one circumferential direction (one end). From the size of the hollow portion 130 when the engagement is engaged, the second locking unit 200 is located farthest from the end (one end) of one side circumferential direction of the second locking unit 300 ( 340 is preferably provided to have an elastic stretch range that can be covered to the size of the hollow portion 130 when the engaging.

5 and 6A, the first block 510 and the second block 520 have an expansion mechanism insertion space capable of inserting an expansion mechanism for applying an external force 600 in an outward direction between mutually opposing surfaces. 540 may be provided in a shape in which it is formed.

For example, the expansion mechanism may be a forceps, and the forceps may be inserted into the expansion mechanism insertion space 540 to open the external force 600 in a direction away from the first block 510 and the second block 520. Can be. The external force 600 applied in this way is transmitted to the inner surface of the hollow portion 130 through the first block 510 and the second block 520, and thus one or more first locking units 200 and one or more first The engagement of one of the two locking units 300 may be released, and the size (diameter) of the hollow portion 130 of the trocar 1 may be sequentially and selectively expanded. As another example, the expansion mechanism inserted into the expansion mechanism insertion space 540 may be a screw of a type in which its diameter increases (expanded) toward the distal end. When the screw is inserted into the expansion mechanism insertion space 540 while the screw is rotated, the diameter of the screw abutting against the inner surface of the expansion mechanism insertion space 540 is expanded as the screw is inserted into the expansion mechanism insertion space 540. ) And the external force 600 may be applied to the second block 520 in the outward direction. However, the expansion mechanism is not limited thereto, and the expansion mechanism may include at least one of various expansion mechanisms capable of transmitting an external force to the inner surface of the hollow part 130 by expanding the expander unit 500 in the outward direction. .

Further, as another embodiment of the expander unit 500, the expander unit 500 may be provided in the form of an expandable (stretchable) fluid injection pocket. For example, if the fluid injection pocket is disposed in the hollow part 130 and then a fluid is injected into the fluid injection pocket by injection or the like, the fluid injection pocket is expanded by a predetermined or more and the fluid injection pocket is expanded. External forces may be exerted on at least a portion of the inner surface in an outward direction. Due to this external force, the winding of the roll unit 100 may be sequentially and selectively released, and the size of the hollow part 130 may be expanded. Further, as another embodiment, the expander unit 500 itself may be a screw of a type in which its diameter increases (expanded) toward the end. As such, the expander unit 500 may be applied to various units capable of applying sufficient external force to enable the size expansion of the hollow portion 130 to the inner surface of the hollow portion 130.

The above description of the present application is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present application. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present application is indicated by the following claims rather than the above description, and it should be construed that all changes or modifications derived from the meaning and scope of the claims and their equivalents are included in the scope of the present application.

Claims

In the trocar inserted from the tip to the distal direction with respect to the surface of the subject corresponding to the surgical site,

A roll unit in which one end portion in the circumferential direction covers the other end portion and formed so that the one end portion and the other end portion are at least partially overlapped and have a hollow portion therein;

A first catching unit disposed on an inner surface of one end of the roll unit; And

A second locking unit disposed on an outer surface of the other end of the roll unit and capable of engaging with the first locking unit,

At least one of the first catching unit and the second catching unit is provided in plurality in intervals along the circumferential direction,

The trocar by the size of the hollow portion is adjusted by the selective engagement of one of the first locking unit and one of the second locking unit.
The method of claim 1,

The locking coupling is a trocar, which is a one-way wedge coupling that prevents the overlapping area of the one end and the other end from being wider and the size of the hollow part is smaller.
The method of claim 2,

The first locking unit has a protrusion shape projecting inwardly from the inner surface of the one end portion, the slope of the other surface of the first protrusion toward the other end is formed more gently than the slope of one surface of the first protrusion that is the opposite side,

The second locking unit has a protrusion shape projecting outward from the outer surface of the other end, the inclination of one surface of the second projection toward the one end is formed more gently than the inclination of the other surface of the second projection that is the opposite side,

The inclination of the one surface of the first projection and the inclination of the other surface of the second projection are set such that the one-way wedge coupling is made by contact between the first surface of the first projection and the other surface of the second projection.
The method of claim 1,

The trocar further comprises a head unit provided on the outermost circumferential surface of the distal end portion to limit the insertion of the distal end portion of the roll unit into the object.
The method of claim 4, wherein

The head unit is disposed on the outermost peripheral surface at a plurality along the circumference, trocar.
The method of claim 1,

The trocar further includes an expander unit inserted into the hollow to apply an external force to the inner surface of the hollow.
The method of claim 6,

The expander unit includes a first block, a second block facing the first block, and an elastic member for elastically connecting the first block and the second block.
The method of claim 7, wherein

The first block and the second block is provided in a shape in which an expansion mechanism insertion space capable of inserting an expansion mechanism for exerting an external force in an outward direction is formed between the mutually opposing surfaces.

The elastic member is provided on each side of the instrument insertion space, trocar.
The method of claim 1,

The subject is an eyeball, trocar.