KR101434629B1 - Trocar assembly - Google Patents

Abstract

A laparoscopic surgical trocar assembly is disclosed. A trocar assembly according to the present invention includes: a guide part which is long and cylindrically-shaped in a vertical direction and can be bent; A body coupled to the upper side of the guide portion; A penetration through the body and the guide; And a grip portion coupled to an upper side of the impact, wherein the guide portion is composed of a sleeve that closely surrounds the coil spring and the coil spring, and when the guide portion is bent, the outer side surface of the coil spring and the inner side surface of the sleeve are at least partially opposed . According to the present invention, when the laparoscopic surgical instrument is inserted into the guide portion and moves in various directions, the coil spring and the sleeve move relative to each other, so that the guide portion is naturally warped. Therefore, insertion and operation of the surgical instrument can be facilitated, It is very easy to separate the needle from the guide portion while the stable support is provided when the trocar assembly is inserted into the patient's body.

Description

A trocar assembly {TROCAR ASSEMBLY}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trocar assembly, and more particularly, to a trocar assembly that can be inserted in a precise position while providing ease of use.

Unlike conventional open surgery, the laparotomy is being performed to minimize the incision of the skin and to restore the patient 's speed.

This laparoscopic operation is a surgical procedure performed by observing the operation site of the abdominal cavity by making a tube through the abdomen of the patient using a surgical apparatus called a trocar (Trocar) and introducing a surgical instrument such as an endoscope into a surgical site in the abdominal cavity, , Biliary stones removal, head protrusion, general surgery and so on.

Here, Trocar refers to a medical instrument used to access the abdominal cavity. The trocar includes a sleeve inserted and fixed into the body through a navel or a skin incision of the patient, and a sleeve inserted through the sleeve to insert a laparoscopic surgical instrument And a body coupled to an upper end of the externally exposed sleeve.

Meanwhile, a head for inserting various laparoscopic surgical instruments is provided in the main body. Inside the head, a silicone material lip for preventing the gas injected into the patient's body from leaking to the outside, Valve or the like is inserted.

Korean Patent Laid-Open Publication No. 10-2011-0028869 discloses a "trocar having a spring-shaped guide portion", specifically, a center through which the surgical instrument is guided, a check valve formed therein, A cylindrical tubular body made of an elastic material having an inner joint at the lower portion thereof and a flexible coupling member fitted into an inner joint portion of the trocar body to guide the surgical instrument and bend flexibly according to the movement of the surgical instrument in the forward, And a lid which is coupled to an upper portion of the trocar body to seal the through hole of the trocar body and has a guide hole through which the surgical instrument passes. Thus, the bent surgical instrument can be freely pivoted It is noted that there is an effect of facilitating the operation by moving in front, back, left, and right within the body.

However, in the trocar disclosed in Korean Patent Laid-open No. 10-2011-0028869, the inner coating portion or the outer coating portion is coated by the spring-like guide portion. In this case, the inner coating portion or the outer coating portion seeps between the springs So that the coating portion and the coil portion strongly interfere with each other when the spring-like guide portion is bent. Ultimately, this action will hinder the surgical instrument from moving freely within the sleeve of the trocar, and improvement is needed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a trocar assembly that can move smoothly in a state in which a laparoscopic surgical instrument is inserted into a sleeve and has improved ease of use.

The object of the present invention is achieved by a guide member comprising: a guide portion which is vertically long and cylindrically shaped and can be bent; A body coupled to the upper side of the guide portion; A penetration through the body and the guide; And a grip portion coupled to an upper side of the needle, wherein the guide portion includes a coil spring and a sleeve that closely surrounds the coil spring, and when the guide portion is bent, an outer surface of the coil spring and an inner surface of the sleeve Wherein the side surfaces are at least partially moveable relative to one another.

The coil spring and the sleeve may be respectively formed, and the coil spring and the coil spring may be inserted into the sleeve.

Further, a portion of the sleeve inserted into the body, which is in contact with the coil spring, may have a constant inner diameter.

In addition, a gas insertion tube communicating with the inside of the guide portion may be coupled to one side of the body.

At this time, a valve may be formed on one side of the gas inserting pipe so as to be pivotally connected to control the opening and closing of the gas inserting pipe.

Meanwhile, the body may include a housing fixed to the upper side of the guide portion and vertically penetrating the housing; A bracket fixed to the inside of the housing and vertically penetrating the guide portion and the gas insertion tube; An on-off valve membrane located at the center of the bracket, having an inner diameter decreasing with a lower portion toward the lower side, and having an incision line formed at the center thereof so as to be bent in a vertical direction; And a fixed valve membrane positioned above the opening / closing valve membrane and having a through hole formed at the center thereof, and the guide portion and the gas inlet tube are communicated with each other below the opening / closing valve membrane.

The housing has a fixing groove formed around the inner circumferential surface of the housing, the inner diameter of which is reduced or equal to the lower side of the housing. The rim of the opening / closing valve membrane and the fixed valve membrane is stacked on the upper end of the bracket, An insertion hole having a larger size than the through-hole is formed at the center, and a cap which is in close contact with the upper side of the fixed valve membrane can be formed.

Further, in the trocar assembly according to the present invention, the diameter of the through-hole may be smaller than or equal to the outer diameter of the plug, and the fixed valve membrane may be bent in the up-and-down direction.

The upper portion of the guide portion may be inserted into the housing and be inserted between the housing and the bracket by a larger diameter than the lower portion of the housing.

In a trocar assembly according to a preferred embodiment of the present invention, a skirt portion surrounding the body is formed on the grip portion, and the grip portion can be slidably moved in the vertical direction of the mouth.

Alternatively, the grip portion may be formed with a skirt portion surrounded by the body and partially delimited so that the end portion of the gas insertion tube is inserted from below, and the grip portion is slidably moved in the vertical direction .

Further, the frictional force acting between the plunger and the fixed valve membrane in a state where the plunger is inserted through the body and the guide portion may be made larger than the frictional force acting between the grip portion and the plunger.

Further, a locking protrusion may be formed on the outer circumferential surface of the sleeve so that its diameter increases toward the upper side.

At this time, the locking protrusion may be repeatedly formed along the longitudinal direction of the sleeve.

According to the present invention, when the laparoscopic surgical instrument is inserted into the guide portion and moves in various directions, the coil spring and the sleeve move relative to each other, so that the guide portion is naturally warped. Therefore, insertion and operation of the surgical instrument can be facilitated, It is very easy to separate the needle from the guide portion while the stable support is provided when the trocar assembly is inserted into the patient's body.

1 is an exploded perspective view of a trocar assembly according to an embodiment of the present invention,
FIG. 2 is a cross-sectional view showing a partial configuration of the trocar assembly shown in FIG. 1,
FIG. 3 is a perspective view showing a state in which the trocar assembly shown in FIG. 1 is assembled;
FIG. 4 is a perspective view showing a state in which the grip portion is moved upward in the trocar assembly shown in FIG. 3;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, the well-known functions or constructions are not described in order to simplify the gist of the present invention.

Fig. 1 is an exploded perspective view showing a trocar assembly 1 according to an embodiment of the present invention, Fig. 2 is a sectional view showing a part of the configuration of the trocar assembly 1 shown in Fig. 1, FIG. 4 is a perspective view showing a state in which the grip portion 400 is moved upward in the trocar assembly 1 shown in FIG. 3; FIG. 4 is a perspective view showing a state in which the trocar assembly 1 shown in FIG. It is a perspective view.

The trocar assembly 1 according to the present invention is used for laparoscopic surgery and can be inserted into the body 2 through a navel or a skin incision of a patient. The trocar assembly 1 includes a guide portion 100, a body 200, a foot 300, and a grip portion 400. The guide unit 100 is used while the guide unit 100, the body 200, the cutter 300 and the grip unit 400 are coupled to each other in the process of being inserted into the body 2, The pusher 300 and the gripper 400 are separated from the guide and the body 200 in a state where the pusher 300 and the gripper 400 are inserted and fixed in the body 2. [

The trocar assembly 1 according to the present invention is roughly divided into two parts. The trocar assembly 1 according to the present invention includes a guide part fixed to the body 2 and a part part of the body part 200, and a pusher 300 for assisting insertion into the body 2. [ And a grasping part 400.

Hereinafter, the trocar assembly 1 according to the present invention will be described with reference to the upper or lower direction with reference to Fig.

The guide portion 100 is formed so as to have a generally cylindrical shape in the vertical direction as a whole and to be bent. The guide part 100 is divided into a coil spring 110 and a sleeve 120.

The coil spring 110 is formed in the same shape as a conventional metal spring. The coil spring 110 according to the present invention is not for the elastic deformation in the longitudinal direction (vertical direction) but for the elastic action in the lateral direction (warping direction). For this purpose, each coil (one turn of the coil) of the coil spring 110 is in close contact with each other.

A surgical instrument such as an endoscope is inserted into the coil spring 110 and the needle 300 according to the present invention is inserted. Accordingly, the inner diameter of the coil spring 110 is preferably slightly larger than the outer diameter of the surgical instrument and the needle 300 used.

The sleeve 120 is formed to completely enclose the coil spring 110 and forms the outer surface of the guide portion 100. The sleeve 120 is preferably made of silicon in order to smoothly deform elastically while being harmless to the human body. The sleeve 120 may be formed by injection molding or the like and the guide part 100 may be assembled in a manner that the coil spring 110 is inserted into the sleeve 120 after formation. Then, the upper end of the guide portion 100 is coupled to the body 200.

The sleeve 120 according to the present invention has a generally constant inner diameter of the sleeve 120. The coil spring 110 is inserted into the body 2 from the sleeve 120, The inner diameter is constant. As a result, the inner surface of the sleeve 120 comes into line contact with the outer surface of the coil spring 110, and the sleeve 120 is not inserted into the gaps or grooves between the coils.

Accordingly, when the guide portion 100 is bent, the outer surface of the coil spring 110 and the inner surface of the sleeve 120 are moved relative to each other, and the guide portion 100 is naturally warped as a whole. That is, the outer side surface of the coil spring 110 and the inner side surface of the sleeve 120 are slid with respect to each other so as not to interfere with each other. This operation is advantageous in that when the surgical instrument is moved in various directions with the surgical instrument inserted into the guide unit 100, the guide unit 100 may be bent so as not to interfere with the movement required during the procedure, Insertion and movement can be easily performed even when a surgical instrument of the present invention is inserted and operated.

The outer circumferential surface of the sleeve 120 is formed with a locking protrusion 121 whose diameter increases toward the upper side. The locking protrusions 121 may be repeatedly formed along the longitudinal direction (vertical direction) of the sleeve 120. The locking protrusion 121 prevents the sleeve 120 from being easily released to the outside in a state where the sleeve 120 is inserted into the body 2. [

The body 200 is coupled to the upper side of the guide part 100 and has a larger diameter than the guide part 100. 2 shows the internal structure of the body 200 according to the present invention in detail.

A gas insertion tube 500 communicating with the inside of the guide part 100 is coupled to one side of the body 200. Carbon dioxide is supplied to the gas insertion tube 500 to allow carbon dioxide to be injected into the body 2 . The gas insertion tube 500 may be made of a material such as silicon, and may be elastically bent by coupling a coil spring 520 therein.

In addition, a valve 510 for controlling the opening and closing of the gas inserting pipe 500 is formed.

The body 200 constituting the trocar assembly 1 according to the present invention includes a housing 210, a bracket 220, an on-off valve membrane 230, a fixed valve membrane 240, and a cap 250 .

The housing 210 is fixed on the upper side of the guide part 100 and is formed to pass through in the vertical direction, and has a generally cylindrical shape. In addition, the inner diameter of the housing 210 decreases or becomes equal to the lower side. In particular, the lower portion 210a may be formed in a tapered shape. In this type of housing 210, the guide portion 100, the bracket 220, the on-off valve membrane 230, the fixed valve membrane 240, and the cap 250 are sequentially inserted through the upper opening, .

The lower end 210b of the housing 210 is bent inward to fit into the groove formed around the outer circumferential surface of the sleeve 120 to thereby assist in fixing the guide part 100 and the body 200. [

A fixing groove 211 is formed around the inner circumferential surface of the upper side 210c of the housing 210 so that the cap 200 is fixed and the body 200 is entirely fixed.

A gas insertion tube 500 is coupled through the insertion tube connection hole 260. The gas insertion tube 500 is inserted into the insertion tube 260 through the insertion tube 260, And is coupled around the connector 260.)

The bracket 220 is fixed to the inside of the housing 210 and passes through the guide part 100 in a vertical direction. The bracket 220 also has a generally cylindrical shape. In addition, the bracket 220 penetrates through the insertion tube connection port 260 and communicates with the gas insertion tube. The lower portion 220b of the bracket 220 has a reduced diameter and is tapered.

The upper portion of the bracket 220 is in close contact with the housing 210, and the lower portion (tapered portion, 220b) is spaced apart from the housing 210. The upper part 100a of the guide part 100 is inserted between these gaps, and the guide part 100 and the body 200 are engaged with each other. That is, the upper portion 100a of the guide portion 100 is formed to have a larger diameter than the lower portion 210a of the housing 210 and is inserted into the housing 210. When the bracket 220 is inserted into the guide portion 100 As shown in FIG.

A sealing member 270 may be formed on the surface where the bracket 220 and the housing 210 are in contact with each other.

The housing 210 and the bracket 220 are both made of a relatively hard material, and may be formed of synthetic resin such as plastic.

The opening / closing valve membrane 230 is made of a material such as silicon, and is formed in the form of a relatively thin film as shown in FIG. 2 to open and close the inside of the bracket 220 (the shape in the plan view is circular). The opening and closing valve membrane 230 is formed such that its inner diameter decreases toward the lower side from the center of the bracket 220 and the incision line 231 is formed at the center thereof. The incision line 231 may be formed in the shape of a cross on a plane view.

Accordingly, when an external force is applied in the downward direction from the center portion of the opening / closing valve membrane 230 (when the needle 300 or the surgical instrument is inserted), it is opened in the incision line 231, The central portion of the opening / closing valve membrane 230 is gathered in close contact with each other so that the gap in the incision line 231 is eliminated (in the case where the pressure acts upward in accordance with the carbon dioxide injected through the gas inserting pipe 500) do. In addition, in the latter case, carbon dioxide is prevented from leaking to the upper side of the body 200.

The rim 230a of the opening and closing valve film 230 is hooked on the upper end of the bracket 220. The guide part 100 and the gas insertion tube 500 communicate with each other below the opening / closing valve membrane 230.

The fixed valve membrane 240 is positioned above the opening / closing valve membrane 230 and has a circular through-hole 241 formed at the center thereof. The diameter of the through-hole 241 is smaller than or equal to the outer diameter of the plunger 300, and the fixed valve layer 240 is formed of a material such as silicon and can be bent in a vertical direction. The diameter of the through-hole 241 in the trocar assembly 1 according to the preferred embodiment of the present invention is preferably slightly smaller than the outer diameter of the cuticle 300, and thus the cuticle 300 or the surgical instrument The protruding portion 241 is relatively tightly adhered to the through hole 241 to prevent leakage of gas through the through hole 241 and friction between the fixed valve membrane 240 and the penetration hole 300 is generated.

The rim 240a of the fixed valve membrane 240 is hooked on the upper end of the bracket 220. [

The cap 250 is made of the same material as the hard plastic. The cap 250 has the same shape as the circular band on the plan view and has an insertion hole 252 having a diameter larger than that of the through hole 241 at the center. The cap 250 has a protrusion 251 formed on an outer circumferential surface thereof and is coupled to the housing 210 in such a manner that the fixing protrusion 251 is fitted into the fixing groove 211. At this time, the lower end of the cap 250 is in close contact with the upper end of the fixed valve membrane 240 and fixes the bracket 220, the on-off valve membrane 230, and the fixed valve membrane 240 to the housing 210.

The plunger 300 is formed in the same shape as a long rod in the longitudinal direction, and is made of a relatively hard material and may be made of synthetic resin such as plastic. In order to improve the rigidity of the foot 300, a metallic core may be included therein.

The lower end 310 of the foot 300 is preferably sharpened for easier insertion into the body 2.

The upper portion 320 (the portion not inserted into the guide portion 100 and the body 200) of the needle 300 is formed slightly larger in diameter than the lower portion 330 thereof. A detent protrusion 321 protruding outward from the outer circumferential surface is formed on one side of the penetration 300 (preferably, the upper end of the penetration 300). The detent projection 321 prevents the projection 300 from slipping downward when sliding relative to the gripper 400.

The grip portion 400 is coupled to the upper side of the needle 300 and the skirt portion 410 is formed below the grip portion 400.

The grip portion 400 is slidable in the vertical direction of the foot 300. That is, the gripping unit 400 and the foot 300 can be moved relative to each other. A slide tube 420 is formed in the grip portion 400 so that the upper portion of the mouthpiece 300 can be inserted into the grip portion 400 and the slide tube 420 can move up and down. And a slide groove 421 is formed on one side of the slide tube 420 to move the detent protrusion 321 of the foot 300 in the up and down direction. The slide groove (421) is elongated in the upward direction from one side of the slide tube (420). The lower end of the slide groove 421 serves as a stop jaw 422 to which the stop protrusion 321 is attached.

The skirt portion 410 is formed so as to surround the body 200 in a state in which the trickle 300 is completely inserted into the guide portion 100 and the body 200 (see FIG. 3). The inner diameter of the skirt portion 410 is equal to or slightly larger than the outer diameter of the body 200. That is, by providing the skirt portion 410, the grip portion 400 is coupled to the body 200 in a form that entirely covers the body 200.

The pusher 300 is formed to be relatively thin as a structure for supporting the guide portion 100 to insert the guide portion 100 into the body 2. The pusher 300 is formed only of the guide portion 100 and the body 200 It is difficult to stably support the body 2 when it is pressed into the body 2. [ In order to solve this problem, in the present invention, a grip portion 400 provided with a skirt portion 410 is coupled to the upper side of the knot 300, and the skirt portion 410 is coupled to the grip portion 400 And the body 200 are coupled to each other. Thus, a strong coupling between the structures is achieved, so that the load transmission from the gripping portion 400 to the impact absorbing portion 300 is stabilized (see Fig. 3). (See Fig. 3)

The skirt portion 410 surrounds the body 200 and has an engagement groove 411 at one side of the skirt portion 410 so that the end portion of the gas injection tube 500 (the end portion connected to the body 200) As shown in FIG. That is, a part of the rim of the skirt portion 410 is erased (removed in the upward direction from the lower end), so that the latching groove 411 is provided. The end portion of the gas insertion tube 500 (the portion of the insertion tube fitting portion 260) is closely fitted into the engaging groove 411.

3) in which the grip portion 400 is completely coupled to the body 200, the relative rotation of the grip portion 400 and the body 200 is prevented based on the vertical axis.

The frictional force acting between the plunger 300 and the fixed valve membrane 240 in a state where the plunger 300 is inserted through the body 200 and the guide part 100 is transmitted to the grip part 400 and the plunger 300 ) Of the friction force acting between the piston and the piston. That is, when the gripper 400 is lifted up in a state where the trocar assembly 1 according to the present invention is assembled, the insert 300 is kept inserted into the guide part 100 and the body 200, Only the gripping part 400 moves in the upward direction of the foot 300. Accordingly, the body 200 is exposed inside the skirt portion 410. (See Fig. 4)

Such a structure facilitates separation of the needle 300 and the gripper 400 in a state where the sleeve 120 is inserted into the body 2. A brief description will be made as follows.

When the trocar 300 and the body 200 (particularly, the toe 300) are pulled (for separation) by pulling the trocar 300 and the gripper 400 while the trocar assembly 1 is inserted into the body 2, And the fixed valve membrane 240), so that the guide unit 100 is subjected to the force of pulling upward.

In order to prevent the guide part 100 from being stably fixed to the body 2, the grip part 400 may be formed by grasping the body 200 coupled to the upper part of the guide part 100, Pull upwards. Since the body 200 is surrounded by the skirt portion 410 and thus the body 200 can not be held, the grip portion 400 is formed to be slidable upward from the toe 300 So that the body 200 is exposed to the outside of the skirt portion 410 and the body 200 is easily gripped by the user.

That is, the trocar assembly 1 according to the present invention is configured such that the grip portion 400, the foot 300, the body 200, and the guide portion 100 are firmly coupled by the skirt portion 410, So that the body 200 can be easily grasped by the user when the foot 300 is separated.

As described above, according to the laparoscopic surgical trocar assembly 1 of the present invention, when the surgical instrument is inserted into the guide portion 100 and moves in various directions, the coil spring 110 and the sleeve 120 The grip portion 400 can be moved in the up-and-down direction of the toe 300 so that the body 2 of the patient can be easily inserted and operated, It is very easy to separate the projections 300 from the guide portion 100 while maintaining stable support when the trocar assembly 1 is inserted into the guide portion 100.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious to those who have. Accordingly, it should be understood that such modifications or alterations should not be understood individually from the technical spirit and viewpoint of the present invention, and that modified embodiments fall within the scope of the claims of the present invention.

1: a trocar assembly 100:
110: coil spring 120: sleeve
121:
200: body 210: housing
211: fixing groove 220: bracket
230: opening / closing valve membrane 231: incision line
240: fixed valve membrane 241: through hole
250: Cap 251: Fixing projection
252: Insertion ball
300: Throw
400: grip part 410: skirt part
411:
500: gas insertion tube 510: valve

Claims (14)

A guide portion which is long and cylindrically shaped in the vertical direction and can be bent;
A body coupled to the upper side of the guide portion;
A penetration through the body and the guide; And
And a grip portion coupled to the upper side of the needle,
The guide portion includes a coil spring and a sleeve that closely surrounds the coil spring,
When the guide portion is bent, at least a part of the outer surface of the coil spring and the inner surface of the sleeve move relative to each other,
A skirt portion surrounding the body is formed in the grip portion,
And the grip portion is slidably moved in the vertical direction of the plunger. The method according to claim 1,
Wherein the coil spring and the sleeve are each formed and assembled together in a manner that the coil spring is inserted into the sleeve. The method according to claim 1,
Wherein a portion of the sleeve inserted into the body contacting the coil spring has a constant inner diameter. The method according to claim 1,
And a gas insertion tube communicating with the inside of the guide portion is coupled to one side of the body. 5. The method of claim 4,
And a valve is formed on one side of the gas insertion tube so as to be rotatable and to control opening / closing of the valve. 5. The apparatus of claim 4,
A housing fixed to the upper side of the guide portion and penetrating in the vertical direction;
A bracket fixed to the inside of the housing and vertically penetrating the guide portion and the gas insertion tube;
An on-off valve membrane located at the center of the bracket, having an inner diameter decreasing with a lower portion toward the lower side, and having an incision line formed at the center thereof so as to be bent in a vertical direction; And
And a fixed valve membrane located above the opening / closing valve membrane and having a through hole formed at the center thereof,
And the guide portion and the gas insertion tube communicate with each other under the opening / closing valve membrane. The method according to claim 6,
Wherein the housing is formed such that its inner diameter decreases or becomes equal to the lower side, wherein a fixing groove is formed around the upper inner peripheral surface,
The edges of the on-off valve membrane and the fixed valve membrane are stacked on top of the bracket,
Wherein a fixing protrusion that is fitted in the fixing groove is formed around the outer circumferential surface, a large insertion hole is formed in the center of the through hole, and a cap which is in close contact with the fixed valve membrane is formed. The method according to claim 6,
The diameter of the through-hole is smaller than or equal to the outer diameter of the needle,
Wherein the fixed valve membrane is capable of being bent in a vertical direction. 8. The method of claim 7,
Wherein the upper portion of the guide portion is inserted into the housing with a larger diameter than the lower portion of the housing, and is inserted between the housing and the bracket. delete The method according to claim 6,
Wherein the skirt portion is provided with a latching groove by removing a part of the rim so that the end portion of the gas insertion tube is inserted from the lower side. 12. The method of claim 11,
Wherein the frictional force acting between the plunger and the fixed valve membrane when the plunger is inserted through the body and the guide is greater than the frictional force acting between the plunger and the plunger. 10. The method according to any one of claims 1 to 9,
And a locking protrusion is formed on an outer circumferential surface of the sleeve so as to extend in a diameter direction toward the upper side. 14. The method of claim 13,
Wherein the locking protrusions are repeatedly formed along the longitudinal direction of the sleeve.

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