KR100948311B1 - Cannular Structure of Water Jet for Prostate Operation - Google Patents

Abstract

The present invention relates to a cannula structure of a waterjet for prostate surgery, and more particularly, two inner tubes are mounted inside the suction tube, and the laser treatment is performed through the first inner tube. By configuring to have a waterjet function, not only switching between the waterjet function and laser treatment is possible, but also the tissue and vapor generated at the treatment site can be pulverized and discharged out of the body during laser treatment using the endoscope. An object of the present invention is to provide a cannula structure of a waterjet for prostate surgery that can improve the visual field of vision, the convenience of the procedure, and the reduction of the operation time. As a means for realizing this, the cannula structure of the water jet for prostate surgery according to the present invention is installed on the handle 200, and separates the body 100 tissue with saline supplied from the outside, and separates the tissue with saline In the cannula structure of the prostate surgical waterjet used to discharge to the body, installed in the handle 200, the suction tube (10) having an incision (11) on one side open; A cap portion 20 closing the opening end of the suction tube 10 in which the cutout portion 11 is formed; A flow switching member 30 installed between the end of the suction tube 10 and the cap 20 to form a flow path switching chamber 36 in the cap 20; A first inner tube 40 inserted into the suction tube 10 in the longitudinal direction and installed to penetrate the flow switching member 30, and having one end communicated with the outside of the cap unit 20; A second inner tube 50 inserted into the suction tube 10 in the lengthwise direction and installed in the flow switching member 30 to communicate with the flow path switching chamber 36 in a high pressure saline solution therein; And a nozzle unit 60 for spraying the saline solution in the longitudinal direction of the suction tube 10 from the flow path switching chamber 36.

Laser Procedure, Waterjet Procedure, Cannula Structure

Description

Cannula structure of water jet for prostate surgery

The present invention relates to a cannula structure of a prostate surgical waterjet, and more particularly, to a cannula structure of a prostate surgical waterjet capable of switching a waterjet procedure and a laser procedure as well as a waterjet procedure and a laser procedure through an endoscope. It is about.

In general, a waterjet refers to a medical inhaler that can be performed through infiltration and suction using characteristics of human-friendly water (eg, saline). This water jet is spotlighted as a medical device that can minimize the damage to the nerves and tissues of the human body by spraying a strong water pressure (saline) to the area to be separated during the procedure to separate the tissues, and inhaled the separated tissues and discharged out of the body Is getting.

1 is a perspective view showing an example of such a conventional waterjet. In FIG. 1, the waterjet comprises a handle 200 and a cannula structure 300 mounted to the handle 200. The cannula structure 300 includes a suction tube 310 having a predetermined diameter and a solution tube 320 for supplying saline solution.

The suction tube 310 is a cutting edge 311 is formed at the closed end, the suction port 312 is formed on the side of the tip. In particular, the suction tube 310 is connected to the external collection tank 330 through the handle 200.

The nozzle tube 321 is formed at the end of the solution tube 320. In particular, the nozzle unit 321 is installed so that the saline solution in the longitudinal direction of the suction tube 310 at the closed end of the suction tube (310). The solution tube 320 is connected to the external solution supply device 340 through the handle 200. The solution supply device 340 is connected to the saline supply tank 341 to supply the saline solution to the nozzle unit 321.

Conventional waterjets made in this way have been widely used for spinal surgery. Spinal surgery is performed by inserting the cannula structure 300 to the affected part of the spine 400. Such spinal surgery usually inserts an endoscope together into the affected part so that the affected part can be visually seen. Subsequently, while checking the tissue 410 to be separated through the endoscope, the affected part is scraped off with the cutting edge 311. At this time, the solution tube 320 is supplied with saline solution from the solution supply device 340. The supplied saline solution is sprayed in the longitudinal direction of the suction tube 310 at a high speed from the nozzle unit 321. As the saline solution is injected at high speed, the pressure around the injection is lowered. Due to this pressure difference, the tissue 410 outside the suction port 312 is sucked into the suction tube 310. The sucked tissue is separated by the saline solution is sprayed at high speed and then collected in the sump 330.

However, since the conventional waterjet has no choice but to separate the tissue from the affected part, it requires a separate medical device when another procedure such as prostate treatment is required, for example, a laser procedure. In addition, even when the laser and waterjet are combined, the two medical devices cannot be used at the same time. Therefore, not only the endoscope's field of view is blurred by the steam or blood generated at the site of the laser treatment, but also the tissues, etc. Was not easy to discharge.

The present invention has been made in view of this point, and more specifically, two inner tubes are mounted inside the suction tube, and the laser treatment is performed through the first inner tube, and the waterjet function through the second inner tube. It is possible to switch between the waterjet function and the laser procedure, and to improve the surgical field of the endoscope because the tissue and vapor generated at the surgical site can be pulverized and discharged out of the body during the laser procedure using the endoscope. And it is an object of the present invention to provide a cannula structure of the waterjet for prostate surgery that can bring the convenience of the procedure, shortening the operation time.

As a means for realizing this, the cannula structure of the prostate surgical waterjet according to the present invention,

In the cannula structure of the prostate surgical waterjet is installed on the handle 200, is used to separate the body 100 tissue with saline supplied from the outside, and to discharge the separated tissue out of the body with saline,

A suction tube 10 installed at the handle 200 and having a cutout 11 at an open side;

A cap portion 20 closing the opening end of the suction tube 10 in which the cutout portion 11 is formed;

A flow switching member 30 installed between the end of the suction tube 10 and the cap 20 to form a flow path switching chamber 36 in the cap 20;

A first inner tube 40 inserted into the suction tube 10 in the longitudinal direction and installed to penetrate the flow switching member 30, and having one end communicated with the outside of the cap unit 20;

A second inner tube 50 inserted into the suction tube 10 in the lengthwise direction and installed in the flow switching member 30 to communicate with the flow path switching chamber 36 in a high pressure saline solution therein; And

It characterized in that it comprises a; nozzle portion 60 for injecting saline solution in the longitudinal direction of the suction tube (10) from the flow path switching chamber (36).

In addition, the suction tube 10, the first and second inner tubes (40, 50) are made of stainless steel, tungsten, titanium, gold, bioceramic or ritanol.

In addition, the cap portion 20 is formed in a container shape in which the edge portion of the bottom portion has a fillet corner R, and an insertion hole 21 is formed on an extension line of the first inner tube 40 on the bottom surface.

In addition, the flow switching member 30 is a portion of the front end surface 31 is cut in a cylindrical shape having a cutting surface 32, the front end surface 31 so that the first inner tube 40 can be installed The mounting hole 33 penetrates in the longitudinal direction, and the inlet surface 34 in which the second inner tube 50 is mounted in the longitudinal direction and the outlet hole 35 in which the nozzle unit 60 is mounted in the longitudinal direction. Is formed. Inlet hole 34 is characterized in that the locking step (34a) is formed inwardly on the inlet side of the incision surface (32). Outflow hole 35 is characterized in that the tapered process to gradually narrow inward from the incision surface (32). The flow switching member 30 is characterized in that the material is rubber, metal or synthetic resin.

In addition, the nozzle unit 60 is characterized in that the venturi-type injection hole 61 and the pressing surface 62 which is pressurized to the flow switching member 30 by the pressure formed in the flow path switching chamber 36 is formed. The pressing surface 62 at this time is characterized in that the tapered surface of the wedge shape.

The cannula structure of the prostate surgical waterjet according to the present invention is mounted inside the suction tube 10 so as to be in a position opposite to the cap portion 20 to support the first and second inner tubes 40 and 50, It further comprises a support member 70 for forming a fluid flow path 71 between the suction tube (10).

In addition, the support member 70 is formed in a semi-circular shape having a constant thickness and one end is cut and has a cut surface 74, and the first and second inner tube (40, 50) is inserted into one surface to support it It is characterized in that the installation holes 72 and 73 are penetrated.

On the other hand, the water jet cannula structure according to the present invention is characterized in that it further comprises an optical fiber 41 is installed so that one end protrudes in front of the cap portion 20 in the first inner tube (40). The cannula structure is characterized in that it further comprises a switching means that can be switched or parallel to the laser treatment using the optical fiber 41 and the waterjet treatment using the second inner tube (50).

According to the present invention has the following effects.

1) Not only laser treatment but also waterjet treatment for prostate surgery can be performed in parallel.

2) When the laser treatment using the endoscope can inhale the vapor generated by the laser treatment, and the surrounding tissue and blood through the waterjet, it is possible to easily secure the field of view of the endoscope.

3) Can also be used for waterjet procedures, such as spine or liposuction.

Hereinafter, the configuration of the present invention with reference to the drawings.

(Configuration)

Figure 2a is an exploded perspective view showing the cannula structure of the water jet for prostate surgery according to the present invention, Figure 2b is a cross-sectional view showing the cannula structure of the water jet for prostate surgery according to the present invention. Here, reference numeral "not shown", "110" shows an example of the tissue of the human body, "200" represents a handle.

The cannula structure according to the present invention includes a suction tube 10 having a predetermined diameter, a cap portion 20 closing the tip of the suction tube 10, and a flow switching member inserted into the cap portion 20 ( 30, nozzles for injecting the first and second inner tubes (40, 50) installed in the suction tube (10), and the saline of which the flow flow direction is changed into the suction tube (10) ( 60).

Figure 3 is a perspective view for explaining the structure of the suction tube according to the present invention. As shown in Figure 3, the suction tube 10 is a tube having a predetermined diameter, both ends are open. In particular, the cutout 11 is cut off at one side. The incision 11 is used to suck the separated tissue 110 and is set to a size capable of maximizing the suction force of the tissue 110 by the injection pressure of the nozzle unit 60 to be described later. As a preferred embodiment of the present invention, the cutout portion 11 is preferably 0.5 to 1.5 mm in width and 2.5 to 3.5 mm in length. The cutout 11 is most preferably 1 mm in width and 3 mm in length.

The suction tube 10 is inserted into the patient's body and then inserted into the patient, so that sufficient rigidity is used. As such a material, in particular, stainless steel, tungsten, titanium, gold, bioceramic, or ethanol may be used. In addition, the suction tube 10 to minimize the damage to the surrounding tissue when inserted into the body 100, in particular to produce a size that can cleanly inhale the separated tissue (110). Preferably, the suction tube 10 is manufactured to have an inner diameter of 2.2 to 2.6 mm and a thickness of 0.2 to 0.4 mm. In a preferred embodiment of the present invention, the suction tube 10 is most preferably manufactured with an inner diameter of 2.4 mm and a thickness of 0.3 mm.

In addition, in the preferred embodiment of the present invention, the suction tube 10 is shown as an example of a circular tube, it can be manufactured in various forms to facilitate the insertion depending on the ease of insertion into the body 100 and the surgical site. .

Figure 4 is a perspective view for explaining the structure of the cap unit according to the present invention. As shown in Figure 4, the cap portion 20 is made of a container shape. The cap part 20 is formed in a container shape, and the insertion hole 21 penetrates to one side in the bottom surface. The insertion hole 21 is formed to have the same inner diameter as that of the first inner tube 40 which will be described later. Preferably, the insertion hole 21 is made into 0.5-0.7 mm. At this time, the inner diameter is determined in consideration of the diameter of the optical fiber 41 is inserted into the first inner tube (40). In the preferred embodiment of the present invention, the inner diameter of the insertion hole 21 is most preferably 0.6 mm.

In addition, the cap portion 20 is formed with a fillet corner (R) having a predetermined radius along the edge at the tip of the container shape. The fillet corner (R) at this time is to facilitate the insertion between the hole or the tissue 100 when the cap portion 20 is inserted into the perforated hole for the procedure and not to damage the tissue 110.

The cap 20 is formed in the same size as the outer diameter and thickness of the suction tube 10 described above. This is the cap 20 is assembled to the tip of the inlet 11 of the suction tube 10 is formed by welding or a screw method, such as to be integrally coupled with the suction tube (10). The cap 20 may use the same material as that of the suction tube 10, that is, stainless steel, tungsten, titanium, gold, bioceramic, or ethanol.

5 is a perspective view showing a flow switching member according to the present invention. As shown in FIG. 5, the flow switching member 30 has a cylindrical shape, and in particular, a part of the front end face 31 is cut off to form a cut face 32 in a stepped form. In addition, the front end surface 31 has a mounting hole 33 formed therethrough so that the first inner tube 40 can be inserted in the longitudinal direction. The cutting surface 32 is formed with an inlet hole 34 and an outlet hole 35 in parallel with the mounting hole 33.

In particular, the inlet hole 34 is formed with a locking step 34a at the inlet side of the incision surface 32. The catching jaw 34a may be formed by passing a part of the inflow hole 34 so as to deviate from the cut surface 32, as shown in FIG. The outflow hole 35 is tapered by inclining narrower toward the inside from the incision surface 32. In addition, it is preferable that the locking step 34a is formed to have the same thickness of the second inner tube 50 so as not to disturb the flow of the saline solution. In addition, as shown in FIG. 6, the outflow hole 35 may be formed so as to span the wall surface between the tip surface 31 and the cut surface 32.

The flow switching member 30 formed as described above is inserted into the cap 20 to form a flow path switching chamber 36 as shown in FIG. 2B between the cap 20. Therefore, the flow switching member 30 is preferably made of a rubber material for airtightness between the suction tube 10 and the cap portion 20. In addition to this, the flow switching member 30 can be made of metal or synthetic resin.

7 is a perspective view showing a first inner tube according to the present invention. As shown in FIG. 7, the first inner tube 40 is inserted into the suction tube 10. In particular, the first inner tube 40 is press-installed in the mounting hole 33, the end is provided so as to be located on the same center line as the insertion hole 21 of the cap portion 20. The first inner tube 40 may be made of stainless steel, tungsten, titanium, gold, bioceramic or ritanol.

In particular, the first inner tube 40 further includes an optical fiber 41 therein, and is configured to receive a laser from the outside through the handle 200. At this time, the end portion of the optical fiber 41 protrudes out of the cap portion 20 through the insertion hole 21. At this time, the protruding optical fiber 41 is protruded by 1 to 2 cm so that laser treatment can be easily performed. In addition, in a preferred embodiment of the present invention, the first inner tube 40 may be made of an optical fiber in addition to the above-described material and used for laser treatment.

As described above, the thickness t of the first inner tube 40 is made thinner than the thickness T of the second inner tube 50. This is to allow the second inner tube 50 to withstand the high pressure to the tube for supplying the high pressure saline solution. The first inner tube 40 has an inner diameter of 0.5 to 0.7 mm and a thickness of 0.15 to 0.25 mm is preferably produced. In a preferred embodiment of the present invention, it is most preferable that the first inner tube 40 is manufactured to have an inner diameter of 0.6 mm and a thickness of 0.2 mm. This is to ensure the size of the cross-sectional area of the suction tube 10 which is a passage of the separated tissue 110.

8 is a perspective view showing a second inner tube according to the present invention. As shown in FIG. 8, the second inner tube 50 forms a thickness T greater than the thickness t of the first inner tube 40. The second inner tube 50 is installed by pressing the end of the second inlet hole 34 of the flow switching means (30). At this time, the second inner tube 50 is inserted and mounted until the end thereof is caught by the locking jaw 34a and no longer moves forward. As the material of the second inner tube 50, stainless steel, tungsten, titanium, gold, bioceramic, or ethanol may be used. In particular, since the second inner tube 50 is a passage for supplying a saline solution of high pressure, it is preferable to make the inner diameter and thickness thicker than the first inner tube 40. Thus, the second inner tube 50 is produced to the inner diameter of 0.4 ~ 0.6mm, the thickness of 0.3 ~ 0.4mm. In a preferred embodiment of the present invention, it is most preferable that the second inner tube 50 is manufactured to have an inner diameter of 0.5 mm and a thickness of 0.35 mm.

On the other hand, in a preferred embodiment of the present invention, the first and second inner tubes (40, 50) is preferably manufactured so that the cross-sectional area size does not exceed half of the cross-sectional size of the suction tube (10). This is the first and second inner tube (40, 50) is installed and discharge the separated tissue 110, etc. through the inner space of the remaining suction tube 10 outside the body 100, wherein the separated tissue (100) This is to prevent the blockage of the suction tube 10 by the).

As for the nozzle part 60, the venturi type injection hole 61 is formed in the center like FIG. 9, and the press surface 62 is formed in the outer peripheral surface. In particular, the venturi-type injection hole 61 uses one of the reduction-expansion tubes each having a large diameter D before and after the center of the small diameter d in the center. At this time, the length ratio of the large diameter (D) and the small diameter (d) is formed so that 4: 1 is configured to accelerate the speed of the saline solution passing through the venturi-type injection hole 61 to be sprayed at high speed. The pressing surface 62 is formed by forming a taper inclined in the longitudinal direction at the end. At this time, the pressing surface 62 has a slightly larger inclination angle than the taper formed in the outlet hole 35 of the flow switching member 30 described above.

The nozzle unit 60 is inserted into the flow switching member 30 so that the pressing surface 62 is in contact with the inner surface of the outlet hole 35. At this time, since the taper angle of the press surface 62 is slightly larger than the taper angle of the outflow hole 35, it can be mounted in an interference fit type and can improve airtightness. In particular, since the nozzle part 60 is pressurized by the flow change of the saline solution, the pressurizing surface 62 pressurizes the inner surface of the outflow hole 35 even more so that the airtight holding becomes stronger. As the material of the nozzle unit 60, stainless steel, tungsten, titanium, gold, bioceramic or littanol may be used.

On the other hand, the present invention further comprises a support member 70 for supporting the first and the second inner tube (40, 50), to form a fluid flow path 71 in the suction tube (10) Can be. The support member 70 has a semi-circular shape having one end and a cut surface 74 having a predetermined thickness. In addition, the supporting member 70 has two installation holes 72 and 73 formed on one surface thereof so as to insert and fix the first and second inner tubes 40 and 50 described above. In particular, the support member 70 is formed in a size slightly larger than the semi-circular shape, as shown in Figure 2b, it is preferable to be inserted into the suction tube 10 can be mounted. That is, the portion to be cut by the formation of the incision surface 74 is not more than 1/3 of the support member 70. This is to secure the mounting space of the first and second inner tubes (40, 50) and to secure the fluid flow path (71) between the incision surface 74 and the suction tube (10).

In addition, in the preferred embodiment of the present invention, although not shown in the drawings, the suction tube 10 and the second internal to the catch tank 330 and the solution supply device 340, respectively, in the handle 200, similar to the conventional cannula structure The tube 50 is connected. In addition, the cannula structure according to the present invention may include a button for switching the driving and stopping of each of the solution supply device 340 and the laser generator (not shown). The operation of the switching means will be described in the method of use.

( How to use 1 )

10A is a cross-sectional view showing a state in which the cannula structure of the prostate surgical waterjet according to the present invention is used for a waterjet procedure. The cannula structure according to the invention can be used as a waterjet. This will be described as an example of the prostate procedure. Reference numeral “200”, not shown, indicates a handle.

First, the cannula structure of the present invention is inserted into the position of the prostate 500, that is, the lower abdomen or the like is cut into the urethra or the like so that the end of the cap portion 20 is to be treated. Preferably the cannula structure is inserted such that the incision 11 is located in the affected part of the tissue 510 to be separated. Subsequently, a button (not shown) for supplying saline solution configured on the handle 100 is pressed. Accordingly, the saline solution is supplied to the second inner tube 50. The saline solution is supplied to the flow path switching chamber 36 formed between the cap 20 and the flow switching member 30 through the second inner tube 50. The saline solution thus supplied is rotated 180 ° in the flow path switching chamber 36 to be sprayed along the longitudinal direction into the suction tube 10 through the injection hole 61 of the nozzle unit 60. At this time, the nozzle unit 60 is pressurized to the outlet hole 35 by the pressure formed in the flow path switching chamber 36 by the saline solution to ensure airtightness. In FIG. 10A, arrows indicated by hidden lines indicate the flow of the saline solution supplied from the outside through the second inner tube 50.

As the saline solution is injected into the suction tube 10 at a high speed, low pressure is formed around the injection hole 61. Due to this pressure difference, the tissue 510 of the prostate 500 on the outside of the incision 11 is sucked into the suction tube 10. The sucked tissue 510 is separated little by little by the saline solution sprayed at high speed. The separated tissue 510 flows along the inside of the suction tube 10 together with the saline solution, and is collected in the external collection tank 330 via the handle 200 through the fluid flow path 71. In FIG. 10A, the arrow indicated by the solid line indicates the flow of the saline solution containing the separated tissue 510 which is injected into the injection hole 61 after the change of direction in the flow path switching chamber 36 and discharged out of the body.

Since the procedure of the prostate using waterjet is performed while checking the treatment site through a separate endoscope, the cannula structure is moved while checking the tissue 510 to be separated. In addition, since the tissue 510 separated by the waterjet, blood, bubbles, etc. are discharged to the outside through the suction tube 10, it is possible to easily secure the surgical field of view of the endoscope.

( How to use 2 )

10B is a cross-sectional view showing a state in which the cannula structure of the prostate surgical waterjet according to the present invention is used for laser surgery. The cannula structure according to the present invention can be used as a laser surgical instrument. Reference numeral “200”, not shown, indicates a handle.

To this end, the cap 20 is inserted through a hole or urethra cut in the body to reach the prostate 500. At this time, the position of the tip of the optical fiber 41 protruding toward the front of the cap 20 is adjusted to the affected part to be treated. This positioning is accomplished through a separate endoscope that is inserted together for the laser procedure. Then, the laser driving button (not shown) is pressed to supply the laser to the optical fiber 41. Thus, the procedure is performed in the affected part in contact with the optical fiber 41. A button for supplying a saline solution is driven to discharge the affected part generated by the laser procedure or the incision tissue around the outside to the outside. Therefore, when the cannula structure of the present invention is pressed the laser drive button, the button (not shown) for the saline supply may be driven together. When the saline supply button is pressed, the tissue, foreign matter, vapor or blood, etc., which are removed by the pressure difference as described above is discharged out of the body together, thereby widening the surgical field of the endoscope. Since the circulation of the saline solution is performed in the same manner as in the above-described method 1, detailed description thereof is omitted here.

( How to use 3 )

The cannula structure according to the present invention can also be operated while easily switching the laser and waterjet procedures of the above-described use method 1 and use method 2. Only the switching method will be described here. The switching is done via a separate button (not shown) configured on the handle 200. That is, when it is determined that the water jet procedure is required for the treatment site through the endoscope, the saline solution is supplied to the second inner tube 50 by pressing the driving button of the solution supply device, and the procedure is performed as in the above-described method 1. If a laser procedure such as tissue dissection and hemostasis is needed during the waterjet procedure, the saline solution is stopped by pressing the stop button. Subsequently, pressing the drive button of the laser generator is to perform a laser treatment as in Method 2.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

1 is a perspective view showing the configuration of a conventional waterjet.

Figure 2a is an exploded perspective view showing the cannula structure of the water jet for prostate surgery according to the present invention.

Figure 2b is a cross-sectional view showing the cannula structure of the water jet for prostate surgery according to the present invention.

Figure 3 is a perspective view for explaining the structure of the suction tube according to the present invention.

Figure 4 is a perspective view for explaining the structure of the cap unit according to the present invention.

5 is a perspective view showing a flow switching member according to the present invention.

Figure 6 is a plan view for showing an embodiment of the flow switching member according to the present invention.

7 is a perspective view showing a first inner tube according to the present invention.

8 is a perspective view showing a second inner tube according to the present invention;

9 is a perspective view showing a nozzle according to the present invention.

10A is a cross-sectional view showing a state in which the cannula structure of the prostate surgical waterjet according to the present invention is used for a waterjet procedure.

10B is a cross-sectional view showing a state in which the cannula structure of the prostate surgical waterjet according to the present invention is used for laser surgery.

<Description of the symbols for the main parts of the drawings>

10, 310: suction tube

11: incision

20 cap

21: insertion hole

30: flow switching member

31: front section

32: incision side

33: mounting hole

34: inflow hole

34a: jamming jaw

35: outflow hole

36: Euro conversion room

40: first inner tube

41: optical fiber

50: second inner tube

60 nozzle part

61: injection hole

62: pressure surface

70 support member

71: fluid flow path

72, 73: mounting hole

74: incision plane

100: the body

110, 510: organization

200: handle

300: cannula structure

311: cutting edge

312 inlet

320: solution tube

321: nozzle unit

330: sump tank

340: solution supply device

400: spine

500: prostate

R: fillet corner

Claims (14)

In the cannula structure of the prostate surgical waterjet is installed on the handle 200, is used to separate the body 100 tissue with saline supplied from the outside, and to discharge the separated tissue out of the body with saline, A suction tube 10 installed at the handle 200 and having a cutout 11 at an open side; A cap portion 20 closing the opening end of the suction tube 10 in which the cutout portion 11 is formed; A flow switching member (30) installed between an end of the suction tube (10) and the cap portion (20) and forming a flow path switching chamber (36) inside the cap portion (20); A first inner tube 40 inserted into the suction tube 10 in a longitudinal direction and installed to penetrate the flow switching member 30, and one end of which is in communication with the outside of the cap part 20; A second inner tube 50 inserted into the suction tube 10 in the longitudinal direction and installed in the flow diverting member 30 to communicate with the flow path switching chamber 36 in a high pressure saline solution therein; And The cannula structure of the waterjet for prostate surgery, characterized in that it comprises a; nozzle unit (60) for injecting the saline solution in the longitudinal direction of the suction tube (10) from the flow path switching chamber (36). The method of claim 1, The suction tube 10 and the first and second inner tubes 40 and 50 are made of stainless steel, tungsten, titanium, gold, bioceramic or ritanol, and cannula of water jet for prostate surgery. rescue. The method of claim 1, The cap portion 20 is formed in a container shape having a bottom portion of the fillet corner (R), the bottom surface is characterized in that the insertion hole 21 is formed on the extension line of the first inner tube (40). Cannula structure of prostate surgical waterjet. The method of claim 1, The flow switching member 30 may be formed in a cylindrical shape having a cutting surface 32 by cutting a portion of the front end surface 31, and the first inner tube 40 may be installed on the front end surface 31. The mounting hole 33 is penetrated in the longitudinal direction so that the inlet surface 34 and the outflow hole 34 in which the second inner tube 50 is mounted in the longitudinal direction are mounted on the cutting surface 32. Cannula structure of the waterjet for prostate surgery, characterized in that the hole 35 is formed. The method of claim 4, wherein The inlet hole 34 is the cannula structure of the water jet for prostate surgery, characterized in that the locking step (34a) is formed inwardly on the inlet side of the incision surface (32). The method of claim 4, wherein The cannula structure of the water jet for prostate surgery, characterized in that the outlet hole 35 is tapered to gradually narrow inward from the incision surface (32). The method of claim 4, wherein The flow switching member 30 is a cannula structure of the water jet for prostate surgery, characterized in that the material is rubber, metal or synthetic resin. The method of claim 7, wherein The flow switching member 30, the prostate surgical waterjet, characterized in that the overall height is formed higher than the inner height of the cap portion 20 so that the cap portion 20 can be pressed when mounted on the suction tube (10). Cannula structure. The method of claim 1, The nozzle unit 60 is provided with a venturi-type injection hole 61 and a pressure surface 62 which is pressurized to the flow switching member 30 by pressure formed in the flow path switching chamber 36. Cannula structure of surgical waterjet. The method of claim 9, The pressing surface 62 is a cannula structure of the water jet for prostate surgery, characterized in that the tapered surface of the wedge shape. The method according to any one of claims 1 to 10, Mounted inside the suction tube 10 so as to be in a position opposite to the cap part 20 to support the first and second inner tubes 40 and 50, and a fluid flow path between the suction tube 10 and the suction tube 10. Cannula structure of the water jet for prostate surgery, characterized in that further comprises a support member (70) to form (71). The method of claim 11, The support member 70 is formed in a semi-circular shape having a predetermined thickness and one end is cut to have a cut surface 74, and the first and second inner tubes (40, 50) to be inserted into one surface to support it. Cannula structure of the waterjet for prostate surgery, characterized in that the installation holes (72,73) are penetrated. The method of claim 12, The cannula structure may further include an optical fiber 41 having one end protruded in front of the cap part 20 in the first inner tube 40. rescue. The method of claim 13, Cannula structure of the waterjet for prostate surgery, characterized in that further comprising a switching means that can be switched to or parallel to the laser treatment using the optical fiber and the waterjet treatment using the second inner tube (50).

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