KR102156112B1 - Apparatus for minimally invasive surgery - Google Patents

Abstract

The present invention, an outer tube formed to extend in one direction; An inner tube which is movably installed inside the outer tube so as to be guided by the outer tube so that one side thereof can be withdrawn from one end of the outer tube; And an elastic guide part coupled to the inner tube and elastically deformed so as to deform one side of the inner tube into a curved shape when the inner tube is withdrawn.

Description

Device for minimally invasive surgery{APPARATUS FOR MINIMALLY INVASIVE SURGERY}

The present invention relates to a device for minimally invasive surgery, and more particularly, to a device for minimally invasive surgery in which the inner tube maintains a bent shape from the outer tube and can be withdrawn.

Medically, surgery refers to curing a disease by cutting, cutting, or manipulating skin, mucous membranes, and other tissues using surgical instruments. In particular, open surgery in which the skin at the surgical site is cut open and the internal organs, etc. are treated, formed, or removed, causing problems such as bleeding, side effects, patient pain, and scars.

On the other hand, instead of incising the skin, a small insertion hole is perforated, through which surgical instruments such as an endoscope, a laparoscope, a surgical instrument, and a microsurgery microscope are inserted to allow the operation to be performed in the body ( MIS: Minimum Invasive Surgery) is in the spotlight.

Minimally invasive surgery is a surgical technique in which only a small number of incisions are made on the surface of the patient's body using a specially designed thin and long surgical tool to minimize the incision required for surgery.

This minimally invasive surgery has the advantage that the incision required for the procedure is small and the amount of bleeding during the procedure is significantly less than that of open surgery, so the patient's recovery period after the operation is quick and the external scar is small, and the recent number of procedures is remarkable. Is increasing.

One example of minimally invasive surgery is laparoscopic radiofrequency cauterization. In the case of laparoscopic radiofrequency cauterization, the procedure was difficult because cauterization was performed by advancing the electrode through the skin using an electrode that is not bent.

In order to improve this problem, the'high frequency electrode surgical device with a flexible tube' described in Patent Document 1 of the prior art document was proposed. Since the active tip is connected to the end of the flexible tube connected to the body of the electrode part, it is a curved environment. It is characterized by allowing the flexible tube to move freely within the body when cauterization is performed.

However, in the case of using a flexible tube from the beginning as described above, it is somewhat difficult to send the active tip to the lesion location where cauterization is performed when the flexible tube is inserted into the body. In other words, when a flexible tube must pass along a curved passage formed from the location of the lesion where cauterization is performed, a flexible flexible tube is inserted from the location at the time of insertion rather than in a curved environment to reach the desired location of the lesion for cauterization. There was a problem that was difficult to do.

Korean Registered Patent Publication No. 10-0954285

An object of the present invention is to provide a device capable of easily reaching a lesion located in a difficult to access place due to the structure of the human body.

In order to solve the above problems, the device for minimally invasive surgery of the present invention includes an outer tube formed to extend in one direction; An inner tube which is movably installed inside the outer tube so as to be guided by the outer tube so that one side thereof can be withdrawn from one end of the outer tube; And an elastic guide part coupled to the inner tube and elastically deformed to deform one side of the inner tube into a curved shape when the inner tube is withdrawn.

According to an example related to the present invention, the inner tube includes: a straight pipe portion capable of moving in the one direction within the outer tube; And a deformable pipe part connected to one end of the straight pipe part and guided by the elastic guide part to be transformed into a curved shape.

The inner tube may include a receiving area that communicates with the straight tube part and the inside of the deformable tube part, and a surgical tool is disposed in the receiving area so that an end of the surgical tool may protrude outside the deformable tube part.

According to another example related to the present invention, when the inner tube is inserted into the outer tube, the elastic guide part is disposed inside the outer tube together with the inner tube so as to be parallel to the outer tube.

The deformable pipe part may be a coil spring.

Preferably, the elastic guide portion is made of a leaf spring, so that the deformable pipe portion and the elastic guide portion may form a double spring structure.

The elastic guide portion may have greater rigidity than the deformable tube portion.

Preferably, whether or not the deformable pipe part can be bent may be determined according to a pitch interval of the deformable pipe part.

In the present invention, since the deformable pipe portion is provided with elastic force by the elastic guide portion, it maintains a straight shape when it is inserted into the outer tube, and has a bent shape when it is withdrawn from the outer tube. Makes it easy to reach the located lesion.

In the present invention, the inner tube may serve as a channel for a surgical tool by having a receiving area for arranging the surgical tool.

In the present invention, the elastic guide portion provides an elastic force to the deformable pipe portion to facilitate bending of the deformable pipe portion when it is withdrawn from the outer tube, and has very high rigidity by forming a double spring structure.

Figure 1a is a conceptual diagram showing an operating state of the device for minimally invasive surgery of the present invention.
Figure 1b is a conceptual diagram showing another operating state of the device for minimally invasive surgery of the present invention.
Figure 2 is a perspective view showing a coupling relationship between the inner tube and the elastic guide of the present invention.
Figure 3a is a perspective view showing an example of a cautery mechanism in which the device for minimally invasive surgery is installed.
Figure 3b is an exploded perspective view showing an exploded upper portion and a pressing portion of the body of Figure 3a.
Figure 3c is an exploded perspective view of Figure 3a.

Hereinafter, embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but the same or similar components are denoted by the same or similar reference numerals, and redundant descriptions thereof will be omitted. The suffix "unit" for the constituent elements used in the following description is given or used interchangeably in consideration of only the ease of writing the specification, and does not itself have a distinct meaning or role from each other. In addition, in describing the embodiments disclosed in the present specification, when it is determined that a detailed description of related known technologies may obscure the subject matter of the embodiments disclosed in the present specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are for easy understanding of the embodiments disclosed in the present specification, and the technical idea disclosed in the present specification is not limited by the accompanying drawings, and all modifications included in the spirit and scope of the present invention It should be understood to include equivalents or substitutes.

Terms including ordinal numbers, such as first and second, may be used to describe various elements, but the elements are not limited by the terms. These terms are used only for the purpose of distinguishing one component from another component.

When a component is referred to as being "connected" to another component, it should be understood that although it may be directly connected to the other component, another component may exist in the middle.

Singular expressions include plural expressions unless the context clearly indicates otherwise.

In the present application, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance.

Hereinafter, the structure of the apparatus 100 for invasive surgery of the present invention will be described with reference to FIGS. 1A to 2.

The apparatus 100 for invasive surgery of the present invention includes an outer tube 10, an inner tube 20, and an elastic guide part 30.

The outer tube 10 is formed to extend in one direction. As shown in FIGS. 1A and 1B, the outer tube 10 may be formed in a tube shape extending left and right in the drawing, and an accommodation space 13 in which the inner tube 20 is installed inside the outer tube 10 ) Is provided.

The inner tube 20 is installed to be movable inside the outer tube 10 so as to be guided by the outer tube 10. In addition, the inner tube 20 is made so that one side can be withdrawn from one end of the outer tube 10. 1A and 1B illustrate an example in which the inner tube 20 is installed in the receiving space 13 of the outer tube 10.

Meanwhile, the inner tube 20 has a receiving area 27 capable of accommodating a surgical tool so that the end of the surgical tool protrudes to the outside.

The inner tube 20 may be configured to include a straight pipe portion 23 and a deformable pipe portion 25.

The straight pipe part 23 is made to be able to move relative to the outer tube 10 inside the outer tube 10. The straight pipe portion 23 is not deformed, is not drawn out to the outside of the outer tube 10, and may be made to perform only linear motion within the outer tube 10.

The deformable pipe part 25 is connected to one end of the straight pipe part 23 and is guided by an elastic guide part 30 to be described later when it is drawn out from one end of the outer tube 10 to be transformed into a curved shape. The deformation tube part 25 may be formed of a coil spring, as shown in FIG. 2 for example. When the deformable tube part 25 is made of a coil spring, it is possible to form a double spring structure together with the elastic guide part 30 to be described later.

The deformable pipe part 25 may have a curved shape or a pre-curved structure having an elastic force capable of being deformed into a curved surface even in a state of being inserted into the outer tube 10. In the present invention, the curved shape may be understood as a bent or curved shape.

In addition, when the deformable pipe part 25 is made of a coil spring, there is little change in pitch at the portion where the elastic guide part 30 to be described later contacts the deformable pipe part 25, and the elastic guide part 30 in the deformable pipe part 25 The possibility of bending is determined according to the pitch interval located on the opposite side of ). In particular, there is no change in curvature from the point when the pitch interval becomes 0.

Meanwhile, a receiving region 27 communicating with each other may be provided inside each of the straight pipe portion 23 and the deformable pipe portion 25 of the inner tube 20. Since the inner tube 20 includes the receiving area 27, a surgical tool may be disposed in the receiving area 27, and the inner tube 20 may serve as a channel for a surgical tool. For example, the inner tube 20 may accommodate configurations such as a cauterization tip, and when the cauterization tip is accommodated, the end of the cauterization tip protrudes to the outside of the deformation tube portion 25.

The elastic guide part 30 is fixedly installed on the inner tube 20 and moves together with the inner tube 20. When the inner tube 20 is withdrawn from the outer tube 10, the elastic guide part 30 provides an elastic force to the inner tube 20 so that one side of the inner tube 20 is deformed in a curved shape. In addition, when the inner tube 20 is inserted into the outer tube 10, the elastic guide unit 30 is a receiving space of the outer tube 10 so as to be parallel to the outer tube 10 together with the inner tube 20 ( 13).

Referring to FIG. 1A, an example in which the inner tube 20 is inserted into the outer tube 10 is shown. In this case, although not clearly shown in FIG. 1A, the elastic guide part 30 is provided with the inner tube 20 It is brought into the outer tube 10.

In addition, referring to Figure 1b, there is shown an example in which the deformable pipe portion 25 of the inner tube 20 is withdrawn from the outer tube 10, at this time, although not clearly shown in Figure 1a, the elastic guide portion 30 Is drawn out from the outer tube 10 together with the deformable tube portion 25 of the inner tube 20.

As shown in FIG. 2, both ends of the elastic guide part 30 may be fixed to one end of the straight pipe part 23 and one end of the deformable pipe part 25, respectively. With this configuration, the elastic guide portion 30 is disposed in parallel with the deformation pipe portion 25 at the outer periphery of the deformation pipe portion 25.

Depending on the position of the elastic guide unit 30, the direction of the force provided for bending is changed, and thus, whether or not bending is possible is determined.

2 shows an example in which the elastic guide part 30 is located above the deformable pipe part 25, which provides an elastic force to the deformable pipe part 25 in the downward direction to facilitate downward bending, and upward Makes bending difficult. By receiving the elastic force in the downward direction, the rigidity against the force acting in the upward direction becomes very large.

If necessary, the elastic guide part 30 may be located under the deformable pipe part 25, in this case, it provides an elastic force to the deformable pipe part 25 in the upward direction to facilitate upward bending, etc. The force acts in a direction opposite to that of the elastic guide part 30 positioned above the deformable tube part 25.

For example, the elastic guide part 30 may be a plate spring having a predetermined thickness, but is not limited thereto, and is made of an elastic material so that one side of the inner tube 20 is removed when the inner tube 20 is drawn out. It can be transformed into a curved shape, and there may be other configurations that can maintain this state.

When the elastic guide part 30 is made of a leaf spring, together with the deformable tube part 25 of the inner tube 20, a double elastic structure may be formed. In addition, when the deformable pipe part 25 is a coil spring, a double spring structure is formed together with a leaf spring, so that it can have a greater rigidity compared to a case without the leaf spring. For this reason, the apparatus 100 for invasive surgery of the present invention can be used for a surgical task requiring relatively high rigidity such as electric cauterization, for example.

The elastic guide part 30 may be fixedly coupled to the inner tube 20 by welding. For example, the elastic guide part 30 has one end of the straight pipe part 23 and a deformable pipe part at both ends by welding. It can be fixedly coupled to one end of (25). By welding, the elastic guide part 30 has a predetermined length and can be coupled to the inner tube 20.

If the device 100 for invasive surgery of the present invention is connected with a configuration that enables the insertion and extraction of the inner tube 20 to be described later, the deformable tube 25 of the inner tube 20 is pulled in and pulled out by a simple operation. You can make it possible. In addition, the apparatus 100 for invasive surgery of the present invention can easily reach a lesion located in a difficult to access place due to the structure of the human body such as a curved bone shape.

On the other hand, in the following, with reference to Figures 3a to 3c, a description will be given of an example of the elastic cautery mechanism 1000 in which the apparatus 100 for minimally invasive surgery of the present invention is installed. The elastic cauterization device 1000 includes the apparatus 100 and a body 3 for minimally invasive surgery described above.

The body 3 may include an upper body 3a and a lower body 3b, as shown in FIG. 3B.

The body 3 is provided with a pull-out member 5, and as shown in FIG. 3A, the pull-out member 5 has a pull-out long hole 6 and a pull-out long hole formed in the body 3 along the longitudinal direction. It is configured to include a pressing portion 7 that is inserted and installed to be slidable in (6).

The pressing part 7 is connected to the inner tube 20 inserted into the body 3. As described in detail with respect to the device 100 for minimally invasive surgery, the outer tube 10 into which the inner tube 20 is inserted is installed through the connector 9 installed inside the body 3, and is installed through the connector 9 ) Is fixed by a hole-shaped outer tube fixing portion 4a formed on the side of the side.

In addition, an outer tube fixing part 4b for fixing the outer tube 10 is installed on one side of the body 3 in the longitudinal direction of the connector 9. The outer tube fixing portion 4b penetrates and fixes the outer tube 10.

On the other hand, on the other side of the connector 9 in the longitudinal direction, a pressing portion installation member 11 is disposed. The pressing part 7 is installed in the pressing part installation member 11, and a connection hole 10 is formed in the pressing part installation member 11, and a connection part (not shown) is coupled to the connection hole 10, thereby Connected to (9). Although not shown in FIGS. 3A to 3C, the connection portion may be a bolt or a pin, and the pressing portion installation member 11 and the connector 9 are connected to each other by the connection portion.

When pressing the pressing part 7 of the draw-out member 5 and pushing it up along the draw-out long hole 6, the deformable pipe part 25 of the inner tube 20 is bent through one end of the outer tube 10. When it is withdrawn and pushed down along the lead-out long hole 6 while pressing the pressing portion 7 on the contrary, the deformable pipe portion 25 of the inner tube 20 is drawn into the bent end of the outer tube 10.

On the other hand, an elastic protrusion 7a is installed on one side of the pressing part 7, and a pressing part guide made of a corrugated surface formed in correspondence with the elastic protrusion 7a on either side of the long side of the retractable long hole 6 (11a) is formed. The moving distance of the pressing part 7 is controlled by the elastic protrusion 7a and the pressing part guide 11a, and the inner tube 20 is drawn out by moving the connector 9 connected to the pressing part mounting member 11 The length is adjusted.

When the inner tube 20 is pulled out by a predetermined length by the elastic protrusion 7a and the pressing part guide 11a, the elastic protrusion 7a rides over the pressing part guide 11a of the waveform and crosses the pressing part 7 ) Is advanced, but when the advancing of the pressing unit 7 is stopped after the inner tube 20 is pulled out by the desired length in stages, the elastic protrusion 7a is caught by the corrugated portion of the pressing unit guide 11a. By not moving forward, it acts as a stopper.

In addition to the elastic protrusion 7a and the corrugated presser guide 11a, the body 3 may be provided with a stop button connected to the rear of the presser 7, and the inner side by pushing up the presser 7 After the tube 20 is pulled out step by step to a desired length, by pushing the stop button down at that position, the pusher 7 acts as a stopper to prevent the pusher 7 from moving forward and backward through the slider guide on the corrugated surface.

As described above, the advantages of using the elastic cauterization device 1000 in which the apparatus 100 for minimally invasive surgery of the present invention is utilized are as follows.

Usually, when treating by cauterizing a lesion in the body with high frequency, a cauterizing device is inserted from the outside of the body so that the tip that emits high frequency reaches the location of the lesion, and the flexible cauterization device in which the device for minimally invasive surgery 100 of the present invention is utilized ( 1000), hold the body (3) from the outside of the body and insert the outer tube (10) into the body once toward the lesion location.

Thereafter, when the outer tube 10 is inserted into the body to form a curved passage to the lesion position to make cauterization difficult, the outer tube 10 is pushed up while pressing the pressing portion 7 of the withdrawal member 5. When the inner tube 20 is bent and withdrawn through the end of the inner tube 20, the inner tube 20, which is withdrawn while being bent, moves smoothly along the bent passage to reach the lesion location.

In this state, the lesion is cauterized and treated by high frequency supplied from the body 3 to the end of the inner tube 20 through the outer tube 10 by the wire connected to the inner tube 20.

When the cautery treatment is completed, the inner tube 20 is bent and moved along the bent passage by pushing down while pressing the pressing part 7 of the withdrawal member 5, and is brought into the curved end of the outer tube 10, and then inside the body. The outer tube 10 inserted into the body is pulled out of the body to complete the use of the elastic cauterization device 1000.

When the inner tube 20 is pulled out to a desired length to reach the lesion position during use in such cauterization, the inner tube 20 is further removed by using a stopper installed on the pull-out member 5 installed on the body 3. Do not advance or retreat.

The flexible cauterization device 1000 in which the device for minimally invasive surgery of the present invention is used is particularly inconvenient and inaccessible to the existing linear tool in cauterizing or cutting tissue in a narrow joint endoscope as well as a laparoscope. There are so many, it is useful in these places.

The apparatus 100 for minimally invasive surgery and the flexible cauterization device 1000 described above are not limited to the configuration and method of the embodiments described above, but the embodiments are all or all of each of the embodiments so that various modifications can be made. Some may be selectively combined and configured.

It is obvious to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit and essential features of the present invention. Therefore, the detailed description above should not be construed as restrictive in all respects and should be considered as illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

100: device for minimally invasive surgery
10: outer tube 13: accommodating space
20: inner tube 23: straight pipe portion 25: deformed pipe portion 27: receiving area
30: elastic guide part
1000: flexible cautery tool
3: body 5: draw-out member
6: Withdrawal and entry long length 7: Pusher
7a: elastic projection 11a: pusher guide
9: Connector 10: Connection hole
11: Presser mounting member

Claims (8)

An outer tube formed to extend in one direction;
An inner tube which is movably installed inside the outer tube so as to be guided by the outer tube so that one side thereof can be withdrawn from one end of the outer tube; And
It is coupled to the inner tube, and includes an elastic guide portion elastically deformed to deform one side of the inner tube into a curved shape when the inner tube is withdrawn,
The inner tube,
A straight pipe portion capable of moving in the one direction within the outer tube; And
And a deformable pipe part connected to one end of the straight pipe part and guided by the elastic guide part to transform into a curved shape,
The deformable tube part is a coil spring,
The elastic guide part is made of a leaf spring, so that the deformable tube part and the elastic guide part form a double spring structure,
The device for minimally invasive surgery, wherein both ends of the elastic guide part are fixedly coupled to one end of the straight pipe part and one end of the deformable pipe part.
delete The method of claim 1,
The inner tube,
A device for minimally invasive surgery, characterized in that it has a receiving area communicating inside the straight tube part and the deformable tube part, and a surgical tool is disposed in the receiving area so that an end of the surgical tool can protrude to the outside of the deformable tube part.
The method of claim 1,
The elastic guide part,
When the inner tube is inserted into the outer tube, the device for minimally invasive surgery, characterized in that disposed inside the outer tube together with the inner tube so as to be parallel to the outer tube.
delete delete The method of claim 1,
The device for minimally invasive surgery, characterized in that the elastic guide portion has a greater rigidity than the deformable tube portion.
The method of claim 1,
The device for minimally invasive surgery, characterized in that the deformable tube part is bendable or not according to the pitch interval of the deformable tube part.

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