Hood for submerged endoscope equipment

Abstract

To provide a technology for discharging air bubbles mixed into a hood for an endoscope device.SOLUTION: A hood for an endoscope device which can be employed to an in-flood endoscope surgical operation using an electric knife at flooding has an attachment part connectable to a tip of the endoscope device, and a salient part which is salient so as to form a tapered cylinder shape from the attachment part. Two or more air-bubble discharge ports are formed at the salient part with intervals in a peripheral direction of the salient part, and the air-bubble discharge ports are formed large at inside opening faces compared with outside opening faces.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a hood for use in underwater endoscopic treatment. [Background technology]

[0002] ESD (endoscopic submucosal dissection) is a treatment method for tumorous lesions (such as early-stage cancer) in the esophagus, stomach, duodenum, and large intestine.

[0003] Traditionally, ESD (endoscopic submucosal dissection), like other endoscopic treatments, has been performed inside the intestine expanded by air insufflation (hereafter, conventional ESD performed under air insufflation will be abbreviated as C-ESD).

[0004] In ESD, a treatment tool called a hood is attached to the tip of the endoscope to ensure a certain distance between the endoscope lens and the tissue and ensure a clear field of view (see Patent Documents 1 to 3, FIG. 1). The hood for the endoscope used in C-ESD is provided with a liquid outlet for discharging the liquid accumulated inside the hood. The liquid discharge capacity by capillary action is inversely proportional to the cross-sectional area of ​​the hole. Therefore, the liquid outlet is designed to be 1.3 mm 2 A circle with a diameter of 1.3 mm is considered to be the guideline (Patent Document 3). Here, conventionally, the size of the liquid outlet has been required to be equal to or smaller than a certain size.

[0005] Recently, the applicant has reported a technique for underwater endoscopic submucosal dissection (hereinafter abbreviated as U-ESD), in which the intestinal tract is expanded with saline, water, or the like (Non-Patent Documents 1 and 2).

[0006] Here, the procedure environment for U-ESD differs from that for C-ESD in the following respects (Non-Patent Documents 1 and 2). - There is no visual impairment due to light reflection, making it easier to see the surgical field compared to under air insufflation. - The refractive index has a magnification effect on the object (approximately 1.33 times), - The mucosa and submucosa rise due to buoyancy.

[0007] As mentioned above, the environments for U-ESD and C-ESD are significantly different, and there has been little research into instruments suitable for U-ESD (Non-Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-218212 [Patent Document 2] Japanese Patent Application Laid-Open No. 2003-204919 [Patent Document 3] Japanese Patent Application Laid-Open No. 2008-272168 [Non-patent literature]

[0009] [Non-Patent Document 1] Nagata M. Usefulness of underwater endoscopic submucosal dissection in saline solution with a monopolar knife for colorectal tumors (with videos). Gastrointestinal Endoscopy 2018; 87: 1345-53 DOI: 10.1016 / j.gie.2017.11.032. [Non-patent document 2] Nagata M. Underwater endoscopic submucosal dissection in saline solution using a bent-type knife for duodenal tumor. VideoGIE 2018; 3: 375-7 DOI: 10.1016 / j.vgie.2018.09.015. Summary of the Invention [Problem to be solved by the invention]

[0010] Here, the generation of air bubbles can be a problem when performing procedures under water immersion. When using an existing endoscopic device hood (an endoscopic device hood for C-ESD) during endoscopic surgery under water immersion, air bubbles cannot be expelled from the liquid outlet and remain inside the endoscopic device hood. It was found that the remaining air bubbles obstruct the surgeon's field of vision (see Figure 11).

[0011] Furthermore, in ESD, it has been desirable to have a hood with a tapered tip so that the tip of the hood for an endoscope device can be inserted into the narrow space under the mucosa and the submucosal layer can be more easily dissected with an electric scalpel. A problem specific to endoscopic hoods with tapered tips is that when performing procedures under water, if air bubbles get inside the hood, the tapered tip makes it difficult for water to be expelled from the tip of the endoscopic hood even when it is pumped in from the endoscope.

[0012] In view of the above circumstances, an object of the present invention is to provide a technique for discharging air bubbles trapped inside a hood for an endoscope device during endoscopic surgery under water. [Means for solving the problem]

[0013] The present invention solves the above problems, A hood for an endoscope device that can be used in endoscopic surgery underwater, a mounting portion connectable to a distal end of an endoscope device; a protrusion extending from the mounting portion; and The protruding portion is a hood for an endoscope device, which has a bubble exhaust port.

[0014] The protruding portion of the hood for an endoscope apparatus according to the present invention is characterized in that it extends from the mounting portion to form a tapered cylindrical shape.

[0015] By providing a bubble outlet, it is possible to provide a hood for an endoscope device that can be used in endoscopic surgery underwater.

[0016] The hood for an endoscopic device according to a preferred embodiment of the present invention can be suitably used in particular for underwater endoscopic submucosal dissection (ESD).

[0017] In a preferred embodiment of the present invention, the bubble discharge port is rectangular, The width of the bubble discharge port is 2 mm or more. By adopting the above configuration, air bubbles that have become trapped inside the hood for an endoscope apparatus can be more reliably discharged.

[0018] In a preferred embodiment of the present invention, the width of the bubble discharge port is 2 mm or more and 3 mm or less, and the length of the bubble discharge port in the longitudinal direction is 10 mm or less. By adopting the above configuration, it is possible to prevent pieces of flesh from being mixed into the endoscope device during the treatment, and to more reliably discharge air bubbles mixed into the hood for the endoscope device.

[0019] In a preferred embodiment of the present invention, the protrusion has two or more bubble discharge ports approximately at a base end of the protrusion, The bubble discharge ports are provided in the circumferential direction of the protrusion so that the intervals between the bubble discharge ports are 5 mm or less. With the above configuration, the buoyancy of the bubbles themselves allows the bubbles to be more reliably discharged from inside the hood for the endoscope device without actively adjusting the orientation of the endoscope device.

[0020] In a preferred embodiment of the present invention, the protrusion has two or more bubble discharge ports in a circumferential direction of the protrusion, The bubble discharge ports are provided so that the intervals between the bubble discharge ports are 2 mm or more. By adopting the above configuration, the strength of the hood body can be maintained. Furthermore, by adopting the above-described configuration, air bubbles can be more reliably discharged from inside the hood for an endoscope device by the buoyancy of the air bubbles themselves, without the need to actively adjust the orientation of the endoscope device.

[0021] In a preferred embodiment of the present invention, the protrusion further includes a liquid outlet, The distance between the bubble outlet and the liquid outlet is 1 mm or more. By adopting the above configuration, it is possible to provide a hood for an endoscope apparatus that can be used for C-ESD while maintaining the strength of the hood body.

[0022] In addition, a preferred embodiment of the present invention is a hood for an endoscopic device that is applicable to endoscopic surgery under water using an electric scalpel under water, comprising: a mounting portion connectable to a distal end of an endoscope device; a protruding portion extending from the mounting portion to have a tapered cylindrical shape; and The protruding portion is provided with two or more bubble discharge ports spaced apart from each other in a circumferential direction of the protruding portion, The bubble discharge port is also a hood for an endoscope device, in which the inner opening surface is larger than the outer opening surface. By adopting the above configuration, air bubbles are less likely to accumulate inside the hood and can be easily released through the air bubble outlet, so that the field of vision is less likely to be obstructed. Furthermore, by adopting the above-described configuration, it is possible to ensure a sufficient area for bubbles to be easily discharged from the bubble discharge port, while making it easier to prevent tissue pieces from entering the inside of the hood through the bubble discharge port.

[0023] In a preferred embodiment of the present invention, the ratio of the area of ​​the outer opening surface to the area of ​​the inner opening surface is within a range of 1:1.05 to 1:1.8.

[0024] In a preferred embodiment of the present invention, the tip opening of the protrusion has a tip opening lower end portion formed to expand the lower end portion, The protrusion has an attachment direction indicator at a position opposite to the lower end of the tip opening. By adopting the above configuration, the treatment tool is less likely to come into contact with the distal end opening.

[0025] The present invention also provides an endoscopic device for endoscopic submerged surgery, comprising: a protrusion extending from a distal end of the endoscope device; The protrusion is also an endoscopic device having a bubble outlet. [Effects of the Invention]

[0026] According to the present invention, it is possible to provide a technique for discharging air bubbles that have become trapped inside an endoscopic device hood during endoscopic submerged surgery. Furthermore, according to the present invention, it is possible to provide a technique for efficiently discharging air bubbles trapped inside a tapered-tip hood for an endoscope apparatus. [Brief explanation of the drawings]

[0027] [Figure 1] FIG. 1 illustrates a conventional technique. [Figure 2] 1 is a diagram showing a hood 1 for an endoscope apparatus according to the first embodiment (the hatched areas in the drawing are openings provided on the surface of the protruding portion). [Figure 3] ii) A view of the hood 1 for an endoscope device of this embodiment 1 as seen from the tip opening 32 side (the hatched area in the figure is the opening provided on the surface of the protruding portion). iii) A side view of the hood 1 for an endoscope device of this embodiment 1 (the hatched area in the figure is the opening provided on the surface of the protruding portion). [Figure 4] 10 is a diagram showing a hood 1 for an endoscope apparatus according to a second embodiment of the present invention (the hatched areas in the figure are openings provided on the surface of the protruding portion). FIG. [Figure 5] ii) A view of the hood 1 for an endoscope device of this embodiment 2 as seen from the tip opening 32 side (the hatched area in the figure is the opening provided on the surface of the protruding portion). iii) A side view of the hood 1 for an endoscope device of this embodiment 2 (the hatched area in the figure is the opening provided on the surface of the protruding portion). [Figure 6] 10 is a diagram showing a hood 1 for an endoscope apparatus according to a third embodiment (the hatched areas in the figure are openings provided on the surface of the protruding portion). FIG. [Figure 7] ii) A view of the hood 1 for an endoscope device of this embodiment 3 as seen from the tip opening 32 side (the hatched area in the figure is the opening provided on the surface of the protruding portion). iii) A side view of the hood 1 for an endoscope device of this embodiment 3 (the hatched area in the figure is the opening provided on the surface of the protruding portion). [Figure 8] 10 is a diagram showing a hood 1 for an endoscope apparatus according to a fourth embodiment (the hatched areas in the figure are openings provided on the surface of the protruding portion). FIG. [Figure 9] ii) A view of the hood 1 for an endoscope device of this embodiment 4 as seen from the tip opening 32 side (the hatched area in the figure is the opening provided on the surface of the protruding portion). iii) A side view of the hood 1 for an endoscope device of this embodiment 4 (the hatched area in the figure is the opening provided on the surface of the protruding portion). [Figure 10] 1 is a diagram showing the hood 1 for an endoscope apparatus of this embodiment being attached to an endoscope apparatus X. FIG. [Figure 11] 10 is a diagram showing how air bubbles escape from the air bubble discharge port 31 when the hood 1 for an endoscope apparatus of the present embodiment is used. FIG. [Figure 12] i) A diagram showing a more preferred embodiment of the hood 1 for an endoscope device of this embodiment (the shaded areas in the figure are openings provided on the surface of the protruding portion). ii) A diagram of the hood 1 for an endoscope device of this embodiment 3 as seen from the tip opening 32 side (the shaded areas in the figure are openings provided on the surface of the protruding portion). iii) A cross-sectional view of the hood 1 for an endoscope device of this embodiment 3, showing the specific shapes of the outer opening surface 311 and inner opening surface 312 of the bubble discharge port 31. [Figure 13] 10 is a diagram showing a state in which a more preferable embodiment of the hood 1 for an endoscope apparatus according to the present embodiment (the bubble discharge port 31 is omitted in the drawing) is attached to an endoscope apparatus X. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0028] The hood 1 for an endoscope apparatus according to this embodiment will be described below, but it goes without saying that the technical scope of the present invention is not limited to this embodiment.

[0029] The endoscopic device hood 1 of this embodiment is an endoscopic device hood 1 that can be used in endoscopic surgery underwater.

[0030] In this specification, the term "submerged endoscopic surgery" refers to any surgery performed using an endoscopic device while the inside of the lumen of the esophagus, stomach, duodenum, large intestine, etc. is filled with liquid and / or gel.

[0031] Here, the endoscopic device hood 1 of this embodiment is an endoscopic device hood 1 that can be applied to treatment using an electric scalpel under water immersion.

[0032] The applicant has confirmed that air bubbles are generated during the procedure, particularly in underwater endoscopic submucosal dissection (hereinafter abbreviated as U-ESD). Therefore, underwater endoscopic submucosal dissection (UNDERWATER ESD) is a preferred example of the underwater endoscopic surgery to which the hood for an endoscopic device of the present invention is applicable.

[0033] In addition, in endoscopic submersion surgery, it is preferable that the substance to be injected is a liquid. When a liquid is injected, by applying the hood for an endoscopic device of the present invention, air bubbles can be smoothly discharged from the air bubble exhaust port. In this case, physiological saline is particularly preferable as the liquid to be injected.

[0034] Here, the hood 1 for an endoscope apparatus of this embodiment has an attachment portion 2 that can be connected to the tip of the endoscope apparatus X, and a protrusion portion 3 that extends from the attachment portion 2. The protrusion 3 has a bubble discharge port 31 .

[0035] A preferred embodiment of the mounting portion 2 included in the endoscopic hood 1 of the present invention will be described below with reference to FIGS.

[0036] In this embodiment, the mounting portion 2 is formed in a cylindrical shape with approximately the same diameter as the tip of the endoscope device X. The mounting portion 2 is made of silicone rubber. By adopting the above configuration, the mounting portion 2 can be mounted on the tip of the endoscope device X by covering it.

[0037] The material of the mounting portion 2 may be any material that can be attached to the tip of the endoscope device X by covering it. The material of the mounting part 2 can be, for example, a flexible material. Examples of flexible materials include vulcanized rubber (such as fluororubber), thermoplastic elastomers (such as styrene-based elastomers), thermoplastic resins, etc. Examples of thermoplastic resins include PE-based resins, PP-based resins, PC-based resins, ABS-based resins, polyamide-based resins, polyester-based resins, etc.

[0038] The thickness of the mounting portion 2 is preferably 0.03 mm or more, more preferably 0.04 mm or more, and even more preferably 0.05 mm or more. By adopting the above configuration, it is possible to provide the hood 1 for the endoscope apparatus X, which can be easily attached to the endoscope apparatus X.

[0039] The thickness of the mounting portion 2 is preferably 1 mm or less, more preferably 0.5 mm or less, more preferably 0.3 mm or less, and even more preferably 0.1 mm or less. The above configuration makes it possible to provide an endoscope hood 1 that is less likely to come off from the endoscope X. Furthermore, the above configuration makes it possible to minimize the increase in outer diameter when attached to the tip of the endoscope, making treatment easier. However, in the present invention, there is no particular limitation on the thickness of the mounting part 2.

[0040] In this embodiment, the mounting portion 2 includes a hard portion 21 between the mounting portion 2 and the protruding portion 3. By including the hard portion 21, the endoscopic device hood 1 can be more easily attached to the endoscopic device X. Furthermore, by providing the hard portion 21, in a configuration in which the bubble discharge port 31 is provided at approximately the base end of the protrusion 3 (the end on the opposite side of the protrusion 3), the shape of the bubble discharge port can be maintained. Furthermore, by providing the hard portion 21, the strength of the hood 1 for an endoscope device can be ensured in a configuration in which a bubble discharge port 31 is provided at approximately the base end of the protrusion 3 (the end opposite the protrusion 3).

[0041] Here, there is no particular limitation on the means for attaching the hood 1 for an endoscope apparatus of the present invention.

[0042] Furthermore, the shape and mechanism of the mounting portion 2 are not particularly limited as long as they can be mounted on the tip of the endoscope device X.

[0043] Hereinafter, with reference to FIGS. 2 to 9, a preferred embodiment of the protrusion 3 provided on the hood 1 for an endoscope apparatus of the present invention will be described.

[0044] In this embodiment, the protrusion 3 is a tapered cylinder.

[0045] By making the protruding portion 3 into a tapered shape, it is possible to prevent air bubbles from entering the hood 1 for an endoscope apparatus. Furthermore, by making the protruding portion 3 tapered, the tip of the hood for an endoscope device can be inserted into a narrow space under the mucosa, making it easier to dissect the submucosal layer with an electric scalpel.

[0046] Here, because the protrusion 3 has a tapered shape, air bubbles that have entered the endoscopic device hood 1 are less likely to escape from the tip opening. Therefore, the present invention is particularly suitable for an endoscopic device hood 1 in which the protrusion 3 has a tapered shape.

[0047] However, in the present invention, there are no particular limitations on the shape, size, and structure of the protrusion 3, as long as it has a shape suitable for use in an internal chamber device hood.

[0048] In this embodiment, the material of the protrusion 3 is polycarbonate resin. By making the protrusion 3 from polycarbonate resin, it has sufficient strength even when provided with a bubble discharge port 31, which will be described later.

[0049] Examples of materials that can be used for the protrusion 3 include thermoplastic resins. Examples of thermoplastic resins include PE resins, PP resins, PC resins, ABS resins, polyamide resins, and polyester resins.

[0050] However, the material of the protrusion 3 may be any material as long as it has sufficient strength for treatment in a form in which a bubble discharge port 31, which will be described later, is provided.

[0051] The thickness of the protrusion 3 is preferably 0.03 mm or more, more preferably 0.04 mm or more, and even more preferably 0.05 mm or more. By adopting the above-mentioned configuration, the strength of the protrusion 3 can be maintained.

[0052] From the viewpoint of the degree of air bubble discharge, the thickness of the protrusion 3 is preferably 1 mm or less, more preferably 0.5 mm or less, more preferably 0.3 mm or less, and even more preferably 0.1 mm or less. However, in the present invention, there is no particular limitation on the thickness of the protrusion 3.

[0053] A more preferable embodiment in which the protrusion 3 has a tapered cylindrical shape will be described below.

[0054] Here, the length of the protruding portion 3 (corresponding to the protruding length from the endoscope device X in this embodiment) is preferably 2 mm or more, preferably 5 mm or more, and more preferably 6.5 mm or more.

[0055] Furthermore, the length of the protruding portion 3 (corresponding to the protruding length from the endoscope device X in this embodiment) is preferably 10 mm or less, more preferably 8 mm or less, and further preferably 7.5 mm or less.

[0056] Here, the opening diameter at the tip of the protrusion 3 (corresponding to the tip opening diameter in this embodiment) is preferably 5 mm or more, more preferably 6.5 mm or more, and even more preferably 7 mm or more. With the above configuration, when the endoscopic hood 1 is attached to the endoscope X, the treatment tools provided in the endoscope X can be easily taken out from the distal end opening 32.

[0057] The opening diameter at the tip of the protrusion 3 (corresponding to the tip opening diameter in this embodiment) is preferably 10 mm or less, more preferably 9 mm or less, and even more preferably 8 mm or less.

[0058] Here, the opening diameter (corresponding to the outer diameter in this embodiment) of the base end of the protrusion 3 is preferably 8 mm or more, more preferably 9.5 mm or more, and even more preferably 11 mm or more.

[0059] The opening diameter (corresponding to the outer diameter in this embodiment) of the base end of the protrusion 3 is preferably 15 mm or less, more preferably 13 mm or less, and even more preferably 11 mm or less.

[0060] However, in the present invention, the overall shape of the protrusion 3 may be within a range that is applicable to a normal hood 1 for an endoscope device.

[0061] Hereinafter, with reference to FIGS. 2 to 9, a preferred embodiment of the bubble discharge port 31 (hatched portion in the drawings) provided in the hood 1 for an endoscope apparatus of the present invention will be described. Here, unless otherwise specified, the shape and size of the opening of the bubble discharge port 31 refer to the shape of the outer surface side (outer opening surface 311) of the bubble discharge port 31.

[0062] In this embodiment, the shape of the opening of the bubble discharge port 31 is approximately rectangular. Here, the shape of the opening of the bubble discharge port 31 may be rectangular. By adopting the above configuration, air bubbles that have become trapped inside the hood 1 for an endoscope apparatus can be more reliably discharged. Furthermore, by adopting the above-described configuration, it is possible to prevent pieces of meat and the like that are generated during treatment from entering through the air bubble discharge port 31.

[0063] In the present invention, the bubble discharge port 31 may be, for example, substantially circular, elliptical, or polygonal.

[0064] In the present invention, the area of ​​the bubble outlet 31 is preferably 10 mm 2 More than 12.5mm, preferably 2 More than 15mm, preferably 2 More than 18mm, preferably 18mm 2 More than 21mm, more preferably2 That's all. By adopting the above configuration, air bubbles that have become trapped inside the hood 1 for an endoscope apparatus can be more reliably discharged.

[0065] The area of ​​the bubble outlet 31 is preferably 50 mm 2 Less than 25mm, preferably 2 The following is fine. By adopting the above-described configuration, it is possible to prevent the intrusion of pieces of meat and the like that occur during treatment through the air bubble discharge port 31.

[0066] A more preferable form in which the bubble discharge port 31 is rectangular will be described below.

[0067] The length of the bubble discharge port 31 in the width direction is preferably 2 mm or more, more preferably 2.5 mm or more, and even more preferably 3 mm or more. By adopting the above configuration, air bubbles that have become trapped inside the hood 1 for an endoscope apparatus can be more reliably discharged.

[0068] The width of the bubble discharge port 31 is preferably 5 mm or less, more preferably 4.5 mm or less, more preferably 3.5 mm or less, and even more preferably 3 mm or less. By adopting the above-described configuration, it is possible to prevent the intrusion of pieces of meat and the like that occur during treatment through the air bubble discharge port 31.

[0069] The length of the bubble discharge port 31 in the longitudinal direction is preferably 5 mm or more, more preferably 6 mm or more, and even more preferably 7 mm or more. By adopting the above configuration, air bubbles that have become trapped inside the hood 1 for an endoscope apparatus can be more reliably discharged.

[0070] The length of the bubble discharge port 31 in the longitudinal direction is preferably 15 mm or less, more preferably 12 mm or less, and even more preferably 10 mm or less. By adopting the above-mentioned configuration, it is possible to prevent the intrusion of pieces of meat and the like that occur during treatment through the air bubble discharge port 31.

[0071] In this embodiment, the number of bubble discharge ports 31 is three or four. However, in the present invention, the number of bubble discharge ports 31 may be two or more, three or more, or four or more. By providing two or more bubble exhaust ports 31, bubbles can be more reliably exhausted from inside the hood 1 for an endoscope device by the buoyancy of the bubbles themselves, without having to actively adjust the orientation of the endoscope device X.

[0072] The bubble discharge ports 31 are preferably arranged symmetrically with the axis of the endoscope hood 1, which is substantially cylindrical, as the center line. The bubble discharge ports 31 are preferably provided at positions above, below, left and right when the endoscope hood 1 is viewed from the tip opening 32 side.

[0073] In this embodiment, the bubble discharge ports 31 are all the same size. However, in the present invention, the bubble discharge ports 31 may have different shapes as long as their sizes are within the above range.

[0074] When performing U-ESD, the patient's position (left lateral, right lateral, supine, or prone) is changed so that the lesion is below gravity. Specifically, to create a submerged environment around the lesion, the patient's position is changed so that the injected liquid (such as saline) accumulates around the lesion and the lesion is on the ground. Since the bubbles generated during U-ESD are gaseous, they have the property of moving in the direction opposite to gravity. Therefore, it is preferable to design the bubble exhaust port 31, which is located on the side opposite to gravity during surgery when attached to the endoscope device X, to be large.

[0075] Specifically, when the endoscope is attached to the endoscope device X and used for surgery, the area of ​​the bubble discharge port 31 located on the opposite side to gravity is preferably 10 mm 2 More than 12.5mm, preferably 2 More than 15mm, preferably 2 More than 18mm, preferably 18mm 2 More than 21mm, more preferably2 It is preferable that the above is set. By adopting the above configuration, air bubbles that have become trapped inside the hood 1 for an endoscope apparatus can be more reliably discharged.

[0076] Furthermore, when attached to the endoscope device X and used for surgery, the width of the bubble discharge port 31 located on the side opposite to gravity is preferably 2.5 mm or more, more preferably 3 mm or more. When attached to the endoscope device X and used for treatment, the length in the longitudinal direction of the bubble discharge port 31 located on the side opposite to gravity is preferably 6 mm or more, and more preferably 7 mm or more. By adopting the above configuration, air bubbles that have become trapped inside the hood 1 for an endoscope apparatus can be more reliably discharged.

[0077] The upper limit of the number of bubble outlets 31 may be any number so long as the strength of the protruding portion 3 can withstand the treatment, and for example, the number of bubble outlets 31 can be set to 5 or less as a guideline.

[0078] A more preferred embodiment of the arrangement of the bubble discharge port 31 provided in the protruding portion 3 will be described below.

[0079] In this embodiment, the bubble discharge port 31 is provided at approximately the base end of the protruding portion 3 (the end on the opposite side of the protruding portion 3). By adopting the above configuration, air bubbles can be discharged without being accumulated inside the hood 1 for an endoscope apparatus.

[0080] In this embodiment, two or more bubble discharge ports 31 are provided at intervals in the circumferential direction of the protruding portion 3 (see FIGS. 2 to 9). By adopting the above-described configuration, it is possible to more reliably discharge air bubbles from inside the hood 1 for an endoscope apparatus by the buoyancy of the air bubbles themselves, without actively adjusting the orientation of the endoscope apparatus X.

[0081] Here, the distance between the bubble discharge ports 31 is preferably 2 mm or more, more preferably 2.5 mm or more, more preferably 3 mm or more, and even more preferably 3.5 mm or more. The above configuration allows the strength of the hood body to be maintained. Also, the buoyancy of the bubbles themselves allows air bubbles to be more reliably expelled from the inside of the hood 1 for an endoscope device, without the need to actively adjust the orientation of the endoscope device X.

[0082] The distance between the bubble discharge ports 31 is preferably 5 mm or less, more preferably 4.5 mm or less, and even more preferably 3.5 mm or less. By adopting the above-described configuration, it is possible to more reliably discharge air bubbles from inside the hood 1 for an endoscope apparatus by the buoyancy of the air bubbles themselves, without actively adjusting the orientation of the endoscope apparatus X.

[0083] In the present invention, it is particularly preferable that the bubble discharge ports 31 are provided around the periphery of the protruding portion 3 at the above-mentioned intervals.

[0084] A more preferred embodiment of the endoscopic hood 1 will be described in more detail below with reference to FIGS.

[0085] In this embodiment, it is preferable that the endoscopic hood 1 further includes a liquid outlet 33 (see FIG. 6). By adopting the above configuration, it is possible to provide the hood 1 for an endoscope apparatus that is also compatible with C-ESD.

[0086] In this embodiment, the opening of the bubble discharge port 31 has a rectangular shape. In the present invention, the bubble discharge port 31 may be, for example, substantially circular, elliptical, or polygonal.

[0087] Here, the liquid outlet 33 must be able to discharge the liquid by capillary action.

[0088] Therefore, the area of ​​the liquid outlet 33 is preferably 2.25 mm 2 Less than 1mm, preferably 2 The following is the result. By adopting the above configuration, liquid that has entered the hood 1 for an endoscope apparatus can be more reliably discharged.

[0089] The area of ​​the liquid outlet 33 is preferably 0.09 mm 2 More than 0.25mm, preferably 2 That's all. By adopting the above configuration, liquid that has entered the hood 1 for an endoscope apparatus can be more reliably discharged.

[0090] The length of the liquid outlet 33 in the longitudinal direction is preferably 1.5 mm or less, more preferably 1 mm or less, and even more preferably 0.7 mm or less. By adopting the above configuration, liquid that has entered the hood 1 for an endoscope apparatus can be more reliably discharged.

[0091] Therefore, the length of the liquid outlet 33 in the longitudinal direction is preferably 0.3 mm or more, more preferably 0.5 mm or more, and even more preferably 0.6 mm or more. By adopting the above configuration, liquid that has entered the hood 1 for an endoscope apparatus can be more reliably discharged.

[0092] Here, the distance between the air bubble outlet 31 and the liquid outlet 33 is preferably 0.5 mm or more, more preferably 0.7 mm or more, and even more preferably 1 mm or more. The above configuration allows the strength of the hood body to be maintained. Also, the buoyancy of the bubbles themselves allows air bubbles to be more reliably expelled from the inside of the hood 1 for an endoscope device, without the need to actively adjust the orientation of the endoscope device X.

[0093] The distance between the air bubble outlet 31 and the liquid outlet 33 is preferably 2 mm or less, and more preferably 1.5 mm or less. By adopting the above configuration, air bubbles that have entered the hood 1 for the endoscope apparatus can be more reliably discharged regardless of the angle of the endoscope apparatus X.

[0094] In this embodiment, the endoscopic device hood 1 further includes a treatment tool guide mechanism 34 (see FIG. 8). By adopting the above-described configuration, it is possible to achieve both reliable treatment and more reliable discharge of air bubbles.

[0095] Here, the treatment tool guide mechanism 34 in this embodiment is a groove body. However, the treatment tool guide mechanism of the present invention is not particularly limited in its mechanism, structure, etc., as long as it is a treatment tool guide mechanism that is normally used in the hood 1 for an endoscope device.

[0096] Here, the distance between the bubble discharge port 31 and the treatment tool guide mechanism 34 is preferably 0.5 mm or more, more preferably 0.7 mm or more, and even more preferably 1 mm or more. The above configuration allows the strength of the hood body to be maintained. Also, the buoyancy of the bubbles themselves allows air bubbles to be more reliably expelled from the inside of the hood 1 for an endoscope device, without the need to actively adjust the orientation of the endoscope device X.

[0097] The distance between the air bubble outlet 31 and the liquid outlet 33 is preferably 2 mm or less, and more preferably 1.5 mm or less. By adopting the above-described configuration, it is possible to more reliably discharge air bubbles from inside the hood 1 for an endoscope apparatus by the buoyancy of the air bubbles themselves, without actively adjusting the orientation of the endoscope apparatus X.

[0098] The present invention also relates to an endoscope apparatus X including the hood 1 for an endoscope apparatus described above. Specifically, the present invention provides an endoscopic device X for endoscopic surgery under water, comprising: A protrusion 3 extends from the tip of the endoscope device X, The protrusion 3 also serves as an endoscope device X having a bubble discharge port 31 . The above content can be used as a preferred embodiment of the endoscope apparatus X of the present invention. In this embodiment, the endoscopic hood 1 and the endoscope X are separable. However, in the present invention, the components may be integrated.

[0099] A more preferred embodiment of the endoscopic hood 1 will now be described with reference to FIG.

[0100] The bubble discharge port 31 in the hood 1 for an endoscope apparatus shown in FIG. 12 is formed so that the inner opening surface 312 is larger than the outer opening surface 311 . Since the inner opening surface 312 is formed larger than the outer opening surface 311, bubbles are less likely to accumulate inside the hood and can be easily released through the bubble discharge port 31, so that the field of view is less likely to be obstructed. Furthermore, by forming the inner opening surface 312 larger than the outer opening surface 311, it is possible to ensure a sufficient area for bubbles to be easily discharged from the bubble discharge port 31, while also making it easier to prevent pieces of meat from entering the inside of the hood through the bubble discharge port 31.

[0101] Here, the area ratio of outer opening surface 311 to inner opening surface 312 is preferably within a range of 1:1.05 to 1:1.8, and more preferably within a range of 1:1.2 to 1:1.6.

[0102] The area of ​​the inner opening surface 312 is preferably 11 mm 2 More than 13.5mm, preferably 2 More than 16mm, preferably 2 More than 19mm, preferably 2 More than 22mm, more preferably 2 That's all. By adopting the above-described configuration, it is possible to ensure a size large enough to allow air bubbles to be easily discharged from the air bubble discharge port 31, while making it easier to prevent tissue pieces from entering the inside of the hood through the air bubble discharge port 31.

[0103] The area of ​​the inner opening surface 312 is preferably 50 mm 2 Less than 25mm, preferably 2 The following is fine. By adopting the above-described configuration, it is possible to prevent the intrusion of pieces of meat and the like generated during treatment through the inner opening surface 312.

[0104] A more preferable embodiment in which the inner opening surface 312 is rectangular will be described below.

[0105] The width of the inner opening surface 312 is preferably 2 mm or more, more preferably 2.5 mm or more, and even more preferably 3 mm or more. By adopting the above configuration, air bubbles that have become trapped inside the hood 1 for an endoscope apparatus can be more reliably discharged.

[0106] The width of the inner opening surface 312 is preferably 5 mm or less, more preferably 4.5 mm or less, more preferably 3.5 mm or less, and even more preferably 3 mm or less. By adopting the above-mentioned configuration, it is possible to prevent the intrusion of pieces of meat and the like that occur during treatment through the air bubble discharge port 31.

[0107] A more preferred embodiment of the configuration of the protruding portion 3 of the hood 1 for an endoscope device will be described below with reference to FIG. 13 (the bubble discharge port 31 is omitted).

[0108] In the embodiment shown in Figure 13, when the hood 1 for an endoscopic device is viewed from the side of the tip opening 32, the lower end side of the tip opening 32 is formed so as to be larger than a perfect circle corresponding to the radius of curvature of the upper end side (see tip opening lower end 321 in Figure 13). By adopting the above configuration, the treatment tool is less likely to come into contact with the distal end opening 32 (see FIG. 13).

[0109] 13, the protruding portion 3 has an attachment direction indicator mark 322 on the surface facing the lower end portion 321 of the distal end opening. By adopting the above configuration, the treatment tool is less likely to come into contact with the distal end opening 32.

[0110] More specifically, in this embodiment, it is difficult to see with the naked eye the lower end 321 of the distal end opening 32 (the part formed to be larger than a perfect circle corresponding to the radius of curvature on the upper end side). Here, by providing the mounting direction indicator 322, the hood 1 for the endoscope device can be mounted on the endoscope device X so that the mounting direction indicator 322 is positioned at the 12 o'clock direction on the monitor screen (see Figure 13). As described above, by providing the mounting direction indicator 322 on the surface facing the distal end opening lower end 321, the distal end opening 32 can be mounted so that the widest part of the distal end opening 32 (the distal end opening lower end 321) corresponds to the extension line of the forceps hole (see Figure 13).

[0111] Here, the mounting direction indicator 322 is a line segment. However, in the present invention, there are no particular restrictions on the form or position of the mark, as long as the position of the lower end 321 of the tip opening 32 (the part formed to be larger than a perfect circle corresponding to the radius of curvature on the upper end side) can be recognized.

[0112] Here, when the mounting direction indicator 322 is a line segment, it is preferable that the line segment connects the tip opening 32 and the base end of the protrusion 3 so that the length of the line segment is the shortest (see FIG. 13). Furthermore, when the bubble discharge port 31 is provided at the part facing the lower end 321 of the tip opening, it is preferable that the tip opening 32 and the bubble discharge port 31 are connected so that the length of the line segment is the shortest.

[0113] The above description can be applied to the preferred embodiments shown in FIGS.

[0114] In the present invention, a hood 1 for an endoscopic device suitable for endoscopic submerged surgery can be manufactured by using a prepared mold to form a material into a desired shape. Furthermore, the present invention also makes it possible to manufacture an endoscopic device hood 1 suitable for endoscopic surgery underwater by using a tool (router or the like) to form a bubble exhaust port 31 on a legitimately obtained, commercially available endoscopic device hood 1 (see Figure 1), smoothing the inner surface of the endoscopic device hood 1, and then applying a hydrophilic coating. [Example]

[0115] <1> Manufacture of hood for endoscope device 1 (1) Example 1 An endoscope hood 1 was manufactured according to the design shown in Table 1 below. The manufactured endoscopic device hood 1 is shown in FIGS.

[0116] [Table 1]

[0117] (2) Example 2 An endoscope hood 1 was manufactured according to the design shown in Table 2 below. The manufactured endoscopic device hood 1 is shown in FIGS.

[0118] [Table 2]

[0119] (3) Example 3 An endoscope hood 1 was manufactured according to the design shown in Table 3 below. The manufactured endoscopic device hood 1 is shown in FIGS.

[0120] [Table 3]

[0121] (4) Example 4 An endoscope hood 1 was manufactured according to the design shown in Table 4 below. The manufactured endoscopic device hood 1 is shown in FIGS.

[0122] [Table 4]

[0123] <2> Verification of bubble discharge ability The manufactured endoscopic hood 1 was attached to the endoscopic device X (see FIG. 10 ), and endoscopic surgery under water was performed. As a result, it was confirmed that air bubbles generated during the procedure were efficiently released through the air bubble outlet 31. That is, it was found that by using the endoscopic device hood 1 of this embodiment, air bubbles generated during a procedure can be efficiently discharged from the endoscopic device hood 1.

[0124] This is thought to be because the bubble discharge port 31 is rectangular and the width of the bubble discharge port 31 is 2 mm or more, which allows the bubbles generated by the treatment to pass through it sufficiently.

[0125] The width of the bubble discharge port 31 is 2 mm or more and 3 mm or less. It has also been found that when the longitudinal length of the air bubble discharge port 31 is 10 mm or less, it is possible to prevent pieces of cut meat and the like from entering through the air bubble discharge port 31.

[0126] The protruding portion 3 has two or more bubble discharge ports 31 in the circumferential direction, It was found that by setting the distance between the bubble exhaust ports 31 to 2 mm or more, the strength of the entire endoscopic device hood 1 is maintained while the buoyancy of the bubbles allows them to escape through the bubble exhaust ports 31 regardless of the orientation of the endoscopic device X (see Figure 11). [Industrial Applicability]

[0127] The present invention can be used in a hood 1 for an endoscope device. [Explanation of symbols]

[0128] 1. Hood for endoscope device 2 Mounting part 21 Hard part 3 Protrusion 31 Air bubble outlet 311 Outer opening surface 312 Inner opening surface 32 Tip opening 321 Lower end of tip opening 322 Mounted Directional Signs 33 Liquid outlet 34 Treatment tool guidance mechanism X-ray endoscope

Claims

1. A hood for an endoscope device that can be used in endoscopic surgery under water using an electric scalpel, a mounting portion connectable to a distal end of an endoscope device; a protruding portion extending from the mounting portion to have a tapered cylindrical shape; and The protruding portion is provided with two or more bubble discharge ports spaced apart from each other in a circumferential direction of the protruding portion, The length of the protrusion is 5 mm or more and 10 mm or less, The opening diameter at the tip of the protrusion is 10 mm or less, and the opening diameter at the base of the protrusion is 15 mm or less, The bubble discharge port is formed so that an inner opening surface is larger than an outer opening surface, The area of ​​the outer opening surface is 18 mm 2 or more and 50 mm ２ is as follows: The bubble discharge port is provided at approximately the base end of the protruding portion. Hood for endoscopic equipment.

2. The hood for an endoscopic device according to claim 1 , wherein the underwater endoscopic surgery is underwater endoscopic submucosal dissection (ESD).

3. the protrusion comprises a liquid outlet; The area of ​​the liquid outlet is 2.25 mm ２ is as follows: The bubble outlet is rectangular, The width direction length of the outer opening surface is 5 mm or less, The longitudinal length of the outer opening surface is 10 mm or less. The hood for an endoscope apparatus according to claim 1 or 2.

4. 4. The hood for an endoscope apparatus according to claim 1, wherein a ratio of the area of ​​the outer opening surface to the area of ​​the inner opening surface is within a range of 1:1.05 to 1:1.

8.

5. 5. The hood for an endoscope apparatus according to claim 1, further comprising a hard portion between the mounting portion and the protruding portion.

6. The tip opening of the protrusion has a tip opening lower end, The protrusion has an attachment direction indicator at a position facing the lower end of the tip opening, and is formed so that the lower end side of the tip opening is larger than a perfect circle corresponding to the radius of curvature of the upper end side. The hood for an endoscope apparatus according to any one of claims 1 to 5.

7. An endoscopic device applicable to endoscopic surgery under water using an electric scalpel under water, a protruding portion extending from a tip of the endoscope device to have a tapered cylindrical shape; The protruding portion is provided with two or more bubble discharge ports spaced apart from each other in a circumferential direction of the protruding portion, The length of the protrusion is 5 mm or more and 10 mm or less, The opening diameter at the tip of the protrusion is 10 mm or less, and the opening diameter at the base of the protrusion is 15 mm or less, The bubble discharge port is formed so that an inner opening surface is larger than an outer opening surface, The area of ​​the outer opening surface is 18 mm 2 or more and 50 mm ２ is as follows: The bubble discharge port is provided at approximately the base end of the protruding portion. Endoscopic device.

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