Hood for immersion endoscopes

Abstract

To provide an endoscope hood that can expel air bubbles that have entered the hood during immersion endoscopic surgery. [Solution] An endoscope hood 1 applicable to immersed endoscopic surgery using an electrosurgical unit under water, comprising a mounting portion 2 connectable to the tip of the endoscope and a protruding portion 3 extending from the mounting portion, wherein the protruding portion is provided with two or more bubble outlets 31 spaced apart from each other in the circumferential direction of the protruding portion.

Description

[Technical Field]

[0001] This invention relates to a hood used in immersion endoscopic treatment. [Background technology]

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

[0003] Traditionally, ESD (endoscopic submucosal dissection), like other endoscopic treatments, has been performed in a bowel tract dilated by air insufflation (hereinafter, conventional ESD performed under air insufflation will be abbreviated as C-ESD).

[0004] In ESD, a device called a hood is attached to the tip of the endoscope to maintain a sufficient field of view by creating distance between the endoscope lens and the tissue (see Patent Documents 1-3, Figure 1). The hood for the endoscope used in C-ESD is equipped with a liquid outlet to drain the liquid that accumulates inside the hood. Here, the liquid drainage capacity due to capillary action is inversely proportional to the cross-sectional area of ​​the hole. Therefore, the liquid outlet should be 1.3 mm. 2 A circle with a diameter of approximately 1.3 mm is considered a guideline (Patent Document 3). Traditionally, the size of the liquid outlet has been required to be below a certain size.

[0005] In recent years, the applicant has reported on underwater endoscopic submucosal dissection (U-ESD), a procedure in which the intestinal tract is dilated with saline solution or water before the procedure (Non-Patent Document 1, Non-Patent Document 2).

[0006] Here, U-ESD differs from C-ESD in the following respects regarding the treatment environment (Non-Patent Document 1, Non-Patent Document 2). • There is no visual field obstruction due to light reflection, and the surgical field is easier to see compared to under air insufflation. • Due to the relationship of refractive index, there is a magnification effect on the object (approximately 1.33 times). • The mucous membrane and submucosa are lifted by buoyancy.

[0007] As described above, the environments for U-ESD and C-ESD are significantly different, and little research has been done on equipment suitable for U-ESD (Non-Patent Document 1, Non-Patent Document 2). [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Japanese Patent Publication No. 2011-218212 [Patent Document 2] Japanese Patent Publication No. 2003-204919 [Patent Document 3] Japanese Patent Publication 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. [Overview of the Initiative] [Problems that the invention aims to solve]

[0010] Here, in the treatment under water immersion, the generation of bubbles is cited as a problem. When using an existing hood for an endoscope device (a hood for an endoscope device for C-ESD) in underwater endoscopy surgery, bubbles cannot be discharged from the liquid discharge port and remain in the hood for the endoscope device. And it has been found that the remaining bubbles obstruct the operator's field of view (see Fig. 11).

[0011] Also, in ESD, in order to make it easier to peel the submucosal layer with an electrosurgical knife by inserting the tip of the hood for the endoscope device into the narrow space under the mucosa, it has been desired to use a hood with a tapered tip. Here, as a problem specific to a hood for an endoscope device with a tapered tip, in the treatment under water immersion, when bubbles enter the hood, since the tip is tapered, it is difficult to discharge the water sent from the endoscope from the tip of the hood for the endoscope device.

[0012] In view of the above circumstances, an object of the present invention is to provide a technique for discharging bubbles mixed in the hood for an endoscope device in underwater endoscopy surgery.

Means for Solving the Problem

[0013] The present invention for solving the above problems is a hood for an endoscope device that can also be used in underwater endoscopy surgery, a mounting part that can be connected to the tip of the endoscope device, a protruding part extending from the mounting part, and having the protruding part having a bubble discharge port, the hood for an endoscope device.

[0014] And the protruding part of the hood for an endoscope device of the present invention is characterized in that it extends from the mounting part in a tapered cylindrical shape.

[0015] By adopting a form provided with a bubble discharge port, it is possible to provide a hood for an endoscope device that can also be used in underwater endoscopy surgery.

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

[0017] Furthermore, in a preferred embodiment of the present invention, the bubble outlet is rectangular, The width of the bubble outlet is 2 mm or more. By adopting the above configuration, air bubbles that have entered the hood for the endoscope device can be more reliably discharged.

[0018] Furthermore, in a preferred embodiment of the present invention, the widthwise length of the bubble outlet is 2 mm or more and 3 mm or less, and the longitudinal length of the bubble outlet is 10 mm or less. By adopting the above configuration, it is possible to prevent tissue fragments from entering the endoscope device while more reliably removing air bubbles that have entered the endoscope device hood.

[0019] In a preferred embodiment of the present invention, the protruding portion has two or more bubble outlets at approximately its base end. The bubble outlets are arranged in the circumferential direction of the protruding portion such that the distance between each bubble outlet is 5 mm or less. By adopting the above configuration, the buoyancy of the bubbles themselves allows for more reliable discharge of air bubbles from inside the hood of the endoscope device, without having to actively adjust the orientation of the endoscope device.

[0020] Furthermore, in a preferred embodiment of the present invention, the protruding portion has two or more bubble outlets in the circumferential direction of the protruding portion. The bubble outlets are arranged such that the distance between them is 2 mm or more. By adopting the above configuration, the strength of the hood itself can be maintained. Furthermore, by adopting the above configuration, the buoyancy of the bubbles themselves allows for more reliable discharge of air bubbles from inside the hood of the endoscope device without having to actively adjust the orientation of the endoscope device.

[0021] Furthermore, in a preferred embodiment of the present invention, the protruding portion is further provided with 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 an endoscope hood that can be used for C-ESD while maintaining the strength of the hood body.

[0022] Furthermore, in a preferred embodiment of the present invention, there is a hood for an endoscope device that can be applied to endoscopic surgery under flooding using an electrosurgical unit, A mounting part that can be connected to the tip of the endoscope device, A protruding portion extending from the aforementioned mounting portion to form a tapered cylindrical shape, It has, The aforementioned protrusion is provided with two or more bubble outlets spaced apart from each other in the circumferential direction of the protrusion. The aforementioned bubble outlet also serves as a hood for an endoscope device, with an inner opening surface that is larger than the outer opening surface. By adopting the above configuration, air bubbles are less likely to accumulate inside the hood and can easily escape through the air bubble outlet, thus minimizing obstruction of the field of view. Furthermore, this configuration ensures sufficient space for air bubbles to be easily expelled from the air bubble outlet, while also making it easier to prevent tissue fragments from entering the inside of the hood through the air bubble outlet.

[0023] Furthermore, 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 the range of 1:1.05 to 1:1.8.

[0024] Furthermore, in a preferred embodiment of the present invention, the tip opening of the protruding portion has a lower tip opening formed to enlarge the lower end, The protruding portion has a mounting direction indicator mark at a position opposite to the lower end of the tip opening. This configuration makes it less likely for the treatment instrument to come into contact with the tip opening.

[0025] Furthermore, this invention is an endoscopic device for endoscopic surgery under immersion, It is equipped with a protrusion extending from the tip of the endoscope device, The protruding part has a bubble outlet and is also an endoscope device. [Effects of the Invention]

[0026] According to this invention, it is possible to provide a technique for discharging air bubbles that have entered the hood of an endoscope device during immersion endoscopic surgery. Furthermore, this invention provides a technology for efficiently discharging air bubbles that have entered the tapered hood of an endoscope device. [Brief explanation of the drawing]

[0027] [Figure 1] This is a diagram showing the conventional technology. [Figure 2] This figure shows the hood 1 for the endoscope device of this embodiment 1 (the shaded area in the figure is an opening provided on the surface of the protruding part). [Figure 3] ii) This is a view of the hood 1 for the endoscope device of this embodiment 1, seen from the tip opening 32 side (the shaded area in the figure is an opening provided on the surface of the protruding part). iii) This is a side view of the hood 1 for the endoscope device of this embodiment 1 (the shaded area in the figure is an opening provided on the surface of the protruding part). [Figure 4] This figure shows the hood 1 for the endoscope device of this embodiment 2 (the shaded area in the figure is an opening provided on the surface of the protruding part). [Figure 5] ii) This is a view of the endoscopic device hood 1 of this embodiment 2, seen from the tip opening 32 side (the shaded area in the figure is an opening provided on the surface of the protruding part). iii) This is a side view of the endoscopic device hood 1 of this embodiment 2 (the shaded area in the figure is an opening provided on the surface of the protruding part). [Figure 6] This figure shows the hood 1 for the endoscope device of this embodiment 3 (the shaded area in the figure is an opening provided on the surface of the protruding part). [Figure 7] ii) This is a view of the hood 1 for the endoscope device of this embodiment 3, seen from the tip opening 32 side (the shaded area in the figure is an opening provided on the surface of the protruding part). iii) This is a side view of the hood 1 for the endoscope device of this embodiment 3 (the shaded area in the figure is an opening provided on the surface of the protruding part). [Figure 8] This figure shows the hood 1 for the endoscope device of this embodiment 4 (the shaded area in the figure is an opening provided on the surface of the protruding part). [Figure 9] ii) This is a view of the hood 1 for the endoscope device of this embodiment 4, seen from the tip opening 32 side (the shaded area in the figure is an opening provided on the surface of the protruding part). iii) This is a side view of the hood 1 for the endoscope device of this embodiment 4 (the shaded area in the figure is an opening provided on the surface of the protruding part). [Figure 10] This diagram shows the hood 1 for the endoscope device in this embodiment being attached to the endoscope device X. [Figure 11] This figure shows how air bubbles escape from the air bubble outlet 31 when using the hood 1 for the endoscope device of this embodiment. [Figure 12] i) A diagram showing a more preferred embodiment of the hood 1 for the endoscope device of this embodiment (the shaded area in the figure is an opening provided on the surface of the protruding part). ii) A diagram of the hood 1 for the endoscope device of this embodiment 3, viewed from the tip opening 32 side (the shaded area in the figure is an opening provided on the surface of the protruding part). iii) A cross-sectional view of the hood 1 for the endoscope device of this embodiment 3, showing the specific shapes of the outer opening surface 311 and the inner opening surface 312 of the bubble outlet 31. [Figure 13] This figure shows a more preferred embodiment of the hood 1 for the endoscope device of this embodiment (the bubble outlet 31 is omitted in the figure) attached to the endoscope device X. [Modes for carrying out the invention]

[0028] The following describes the hood 1 for the endoscope device in this embodiment, 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 in this embodiment is an endoscopic device hood 1 that can also be used in endoscopic surgery under water immersion.

[0030] In this specification, immersion endoscopic surgery refers to all surgical procedures performed using an endoscopic device while the lumen of organs such as the esophagus, stomach, duodenum, and large intestine is filled with liquid and / or gel.

[0031] In this embodiment, the endoscopic device hood 1 is applicable to procedures using an electrosurgical unit under immersion conditions.

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

[0033] Furthermore, in immersion endoscopic surgery, it is preferable that the substance injected is a liquid. When a liquid is injected, applying the endoscopic device hood of this invention allows air bubbles to be smoothly discharged from the air bubble outlet. Among the liquids to be injected, physiological saline solution is particularly preferred.

[0034] In this embodiment, the hood 1 for the endoscope device has a mounting portion 2 that can be connected to the tip of the endoscope device X, and a protruding portion 3 that extends from the mounting portion 2. Furthermore, the protruding portion 3 has a bubble outlet 31.

[0035] The preferred form of the mounting portion 2 of the endoscopic device hood 1 of the present invention will be described below with reference to Figures 2 to 9.

[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. With the above configuration, the attachment part 2 can be placed over and attached to the tip of the endoscope device X.

[0037] Here, the material of the attachment part 2 can be any material that can be attached over the tip of the endoscope device X. For example, a flexible material can be used as the material for the mounting portion 2. Examples of flexible materials include vulcanized rubber (such as fluororubber), thermoplastic elastomers (such as styrene elastomers), and thermoplastic resins. Examples of thermoplastic resins include PE resins, PP resins, PC resins, ABS resins, polyamide resins, and polyester resins.

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

[0039] Furthermore, 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. By adopting the above configuration, it is possible to provide an endoscope hood 1 that is less likely to detach from the endoscope X. Furthermore, by adopting the above configuration, the increase in the outer diameter when attached to the tip of the endoscope can be minimized, making the procedure easier to perform. However, in this invention, there are no particular restrictions on the thickness of the mounting portion 2.

[0040] In this embodiment, the mounting portion 2 includes a rigid portion 21 between the mounting portion 2 and the protruding portion 3. By including the rigid portion 21, the attachment of the endoscopic device hood 1 to the endoscopic device X can be made easier. Furthermore, by providing the rigid portion 21, the shape of the bubble outlet 31 can be maintained in a configuration in which the bubble outlet 31 is provided at approximately the base end of the protruding portion 3 (the end on the opposite side of the protruding portion 3). Furthermore, by providing the rigid portion 21, the strength of the endoscopic device hood 1 can be ensured in a configuration in which the bubble outlet 31 is provided at approximately the base end of the protruding portion 3 (the end on the opposite side of the protruding portion 3).

[0041] In this regard, there are no particular restrictions on the means of attachment for the endoscopic device hood 1 of the present invention.

[0042] Furthermore, there are no particular restrictions on the shape and mechanism of the attachment part 2, as long as it can be attached to the tip of the endoscope device X.

[0043] The following describes preferred forms of the protruding portion 3 provided by the endoscopic device hood 1 of the present invention, with reference to Figures 2 to 9.

[0044] In this embodiment, the protruding portion 3 is a tapered cylindrical shape.

[0045] By making the protruding portion 3 tapered, it is possible to suppress the entry of air bubbles into the hood 1 for the endoscope device. Furthermore, by making the protruding portion 3 tapered, the tip of the endoscopic device hood can be inserted into the narrow space beneath the mucosa, making it easier to dissect the submucosal layer with an electrosurgical unit.

[0046] Here, because the protruding portion 3 has a tapered shape, air bubbles that have entered the inside of the endoscopic device hood 1 are less likely to escape from the tip opening. For this reason, the present invention is particularly suitable for endoscopic device hoods 1 in which the protruding portion 3 has a tapered shape.

[0047] However, in this invention, there are no particular restrictions on the shape, size, or structure of the protruding portion 3, as long as it is a shape suitable for use in a hood for an internal device.

[0048] In this embodiment, the material of the protruding portion 3 is polycarbonate resin. By making the protruding portion 3 from polycarbonate resin, sufficient strength is maintained even in the configuration in which the bubble discharge port 31 described later is provided.

[0049] Examples of materials applicable to the protruding portion 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 protruding portion 3 may be any material that provides sufficient strength for the procedure in the configuration in which the bubble outlet 31 described later is provided.

[0051] Furthermore, the thickness of the protruding portion 3 is preferably 0.03 mm or more, more preferably 0.04 mm or more, and more preferably 0.05 mm or more. By adopting the above configuration, the strength of the protruding portion 3 can be maintained.

[0052] Furthermore, from the viewpoint of the degree of bubble discharge, the thickness of the protruding portion 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 this invention, there are no particular restrictions on the thickness of the protruding portion 3.

[0053] A more preferred form is described below when the protruding portion 3 is a tapered cylindrical shape.

[0054] Here, the length of the protruding portion 3 (corresponding to the length protruding 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 length protruding from the endoscope device X in this embodiment) is preferably 10 mm or less, preferably 8 mm or less, and more preferably 7.5 mm or less.

[0056] Here, the opening diameter of the tip of the protruding portion 3 (corresponding to the tip opening diameter in this embodiment) is preferably 5 mm or more in diameter, more preferably 6.5 mm or more, and even more preferably 7 mm or more. With the above configuration, when the hood 1 for the endoscope device is attached to the endoscope device X, the treatment instruments provided by the endoscope device X can be easily taken out from the tip opening 32.

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

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

[0059] Furthermore, the opening diameter of the three protruding ends (corresponding to the outer diameter in this embodiment) is preferably 15 mm or less, more preferably 13 mm or less, and even more preferably 11 mm or less.

[0060] However, in this invention, the overall shape of the protruding portion 3 is acceptable as long as it is within a range that is applicable to the hood 1 for a standard endoscope device.

[0061] The preferred form of the bubble outlet 31 (shaded area in the figures) provided in the endoscopic device hood 1 of the present invention will be described below with reference to Figures 2 to 9. Here, unless otherwise specified, the shape and size of the opening of the bubble outlet 31 refer to the shape of the outer surface (outer opening surface 311) of the bubble outlet 31.

[0062] In this embodiment, the shape of the opening of the bubble outlet 31 is approximately rectangular. Here, the shape of the opening of the bubble outlet 31 may be rectangular. By adopting the above configuration, air bubbles that have entered the hood 1 for the endoscope device can be more reliably discharged. Furthermore, by adopting the above configuration, it is possible to suppress the ingress of tissue fragments and other materials generated during the procedure through the air bubble outlet 31.

[0063] In this invention, the bubble outlet 31 may be, for example, substantially circular, elliptical, or polygonal.

[0064] In this invention, the area of ​​the bubble outlet 31 is preferably 10 mm 2 More preferably 12.5 mm 2 More preferably 15 mm 2 More preferably 18 mm 2 More preferably 21 mm2 That's all. By adopting the above configuration, air bubbles that have entered the hood 1 for the endoscope device can be discharged more reliably.

[0065] Furthermore, the area of ​​the bubble outlet 31 is preferably 50 mm². 2 More preferably 25mm 2 The following is acceptable. By adopting the above configuration, it is possible to suppress the ingress of tissue fragments and other materials generated during the procedure through the air bubble outlet 31.

[0066] A more preferred configuration when the bubble outlet 31 is rectangular will be described below.

[0067] The widthwise length of the bubble outlet 31 is preferably 2 mm or more, more preferably 2.5 mm or more, and more preferably 3 mm or more. By adopting the above configuration, air bubbles that have entered the hood 1 for the endoscope device can be discharged more reliably.

[0068] Furthermore, the widthwise length of the bubble outlet 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 configuration, it is possible to suppress the ingress of tissue fragments and other materials generated during the procedure through the air bubble outlet 31.

[0069] The longitudinal length of the bubble outlet 31 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 entered the hood 1 for the endoscope device can be discharged more reliably.

[0070] Furthermore, the longitudinal length of the bubble outlet 31 is preferably 15 mm or less, more preferably 12 mm or less, and more preferably 10 mm or less. By adopting the above configuration, it is possible to suppress the ingress of tissue fragments and other materials generated during the procedure through the air bubble outlet 31.

[0071] In this embodiment, the number of the bubble discharge ports 31 is 3 or 4. However, in the present invention, the number of the bubble discharge ports 31 may be 2 or more, 3 or more, or 4 or more. By adopting a form in which two or more bubble discharge ports 31 are provided, the bubbles can be more reliably discharged from the inside of the hood 1 for the endoscope device by the buoyancy of the bubbles themselves without actively adjusting the orientation of the endoscope device X.

[0072] In addition, the arrangement of the bubble discharge ports 31 is preferably in a form provided symmetrically with the axis of the hood 1 for the endoscope device, which is substantially cylindrical, as the center line. And, when viewing the hood 1 for the endoscope device from the side of the tip opening 32, the arrangement of the bubble discharge ports 31 is preferably provided at the upper, lower, left, and right positions.

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

[0074] Here, when performing U-ESD, the patient's body position (any one of the left lateral decubitus position, right lateral decubitus position, supine position, and prone position) is changed so that the lesion is on the lower side of gravity. Specifically, in order to create a flooded environment around the lesion, the body position is changed so that the lesion is on the upper side of the ground so that the injected liquid (such as physiological saline) accumulates around the lesion. And, since the bubbles generated during U-ESD are gas, they have the property of moving in the direction opposite to gravity. Therefore, when the endoscope device X is attached, it is preferable to design the bubble discharge port 31 located on the side opposite to the gravity during the operation to be large.

[0075] Specifically, the area of the bubble discharge port 31 located on the side opposite to the gravity in the state of being attached to the endoscope device X and used for the operation is preferably 10 mm 2 or more, preferably 12.5 mm 2 or more, more preferably 15 mm 2 or more, more preferably 18 mm 2 or more, still more preferably 21 mm2 It is preferable to keep the above in place. By adopting the above configuration, air bubbles that have entered the hood 1 for the endoscope device can be discharged more reliably.

[0076] Furthermore, it is preferable that the width of the bubble outlet 31, located on the opposite side of gravity when attached to the endoscope device X and used for treatment, be 2.5 mm or more, more preferably 3 mm or more. Furthermore, when the endoscope is attached to the endoscope device X and used for treatment, the longitudinal length of the bubble outlet 31, which is located on the opposite side of gravity, is preferably 6 mm or more, and more preferably 7 mm or more. By adopting the above configuration, air bubbles that have entered the hood 1 for the endoscope device can be discharged more reliably.

[0077] The upper limit of the number of bubble outlets 31 is limited as long as the strength of the protruding part 3 can withstand the procedure. For example, the number of bubble outlets 31 can be limited to 5 or less.

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

[0079] Furthermore, in this embodiment, the bubble outlet 31 is provided at approximately the base end of the protrusion 3 (the end on the opposite side of the protrusion 3). By adopting the above configuration, air bubbles can be discharged without accumulating inside the hood 1 for the endoscope device.

[0080] Furthermore, in this embodiment, two or more bubble outlets 31 are provided at intervals in the circumferential direction of the protruding portion 3 (see Figures 2 to 9). By adopting the above configuration, the buoyancy of the bubbles themselves allows for more reliable discharge of the bubbles from inside the hood 1 for the endoscope device, without having to actively adjust the orientation of the endoscope device X.

[0081] Here, the spacing between the bubble outlets 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. By adopting the above configuration, the strength of the hood body can be maintained. Furthermore, without actively adjusting the orientation of the endoscope device X, the buoyancy of the bubbles themselves allows for more reliable discharge of bubbles from inside the endoscope device hood 1.

[0082] Furthermore, the spacing between the bubble outlets 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 configuration, the buoyancy of the bubbles themselves allows for more reliable discharge of the bubbles from inside the hood 1 for the endoscope device, without having to actively adjust the orientation of the endoscope device X.

[0083] In this invention, it is particularly preferable that the bubble outlets 31 are provided around the protruding portion 3 at the above-mentioned intervals.

[0084] A more preferred embodiment of the hood 1 for the endoscope device will be described in more detail below with reference to Figures 6 to 9.

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

[0086] In this embodiment, the shape of the opening of the bubble outlet 31 is rectangular. In this invention, the bubble outlet 31 may be, for example, substantially circular, elliptical, or polygonal.

[0087] Here, the liquid outlet 33 needs to discharge the liquid by capillary action.

[0088] Therefore, the area of ​​the liquid outlet 33 is preferably 2.25 mm². 2 More preferably 1 mm 2 The following applies: By adopting the above configuration, liquids that have entered the hood 1 for the endoscope device can be discharged more reliably.

[0089] Furthermore, the area of ​​the liquid outlet 33 is preferably 0.09 mm². 2 More preferably 0.25 mm 2 That's all. By adopting the above configuration, liquids that have entered the hood 1 for the endoscope device can be discharged more reliably.

[0090] The longitudinal length of the liquid outlet 33 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, liquids that have entered the hood 1 for the endoscope device can be discharged more reliably.

[0091] Therefore, the longitudinal length of the liquid outlet 33 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, liquids that have entered the hood 1 for the endoscope device can be discharged more reliably.

[0092] Here, the distance between the 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. By adopting the above configuration, the strength of the hood body can be maintained. Furthermore, without actively adjusting the orientation of the endoscope device X, the buoyancy of the bubbles themselves allows for more reliable discharge of bubbles from inside the endoscope device hood 1.

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

[0094] In this embodiment, the hood 1 for the endoscope device is further equipped with a treatment instrument guidance mechanism 34 (see Figure 8). By adopting the above configuration, it is possible to achieve both reliable treatment and more reliable removal of air bubbles.

[0095] In this embodiment, the treatment tool guidance mechanism 34 is a grooved body. However, the instrument guidance mechanism in this invention is not particularly limited in terms of its mechanism, structure, etc., as long as it is an instrument guidance mechanism that is normally used in the hood 1 for endoscope devices.

[0096] Here, the distance between the bubble outlet 31 and the treatment tool guidance mechanism 34 is preferably 0.5 mm or more, more preferably 0.7 mm or more, and even more preferably 1 mm or more. By adopting the above configuration, the strength of the hood body can be maintained. Furthermore, without actively adjusting the orientation of the endoscope device X, the buoyancy of the bubbles themselves allows for more reliable discharge of bubbles from inside the endoscope device hood 1.

[0097] Furthermore, the distance between the bubble outlet 31 and the liquid outlet 33 is preferably 2 mm or less, more preferably 1.5 mm or less. By adopting the above configuration, the buoyancy of the bubbles themselves allows for more reliable discharge of the bubbles from inside the hood 1 for the endoscope device, without having to actively adjust the orientation of the endoscope device X.

[0098] Furthermore, this invention is also an endoscope device X equipped with the aforementioned hood 1 for the endoscope device. Specifically, the present invention is an endoscopic device X for endoscopic surgery under immersion, The endoscope device X is equipped with a protruding part 3 extending from its tip, The protruding part 3 is also an endoscope device X, having a bubble outlet 31. A preferred embodiment of the endoscope device X of the present invention can be derived by referring to the above description. Furthermore, in this embodiment, the hood 1 for the endoscope device and the endoscope device X are separable. However, in this invention, each component may be integrated.

[0099] A more preferred embodiment of the hood 1 for the endoscope device will be described below with reference to Figure 12.

[0100] In the endoscopic device hood 1 shown in Figure 12, the bubble outlet 31 has an inner opening surface 312 that is larger than the outer opening surface 311. Because the inner opening surface 312 is larger than the outer opening surface 311, air bubbles are less likely to accumulate inside the hood and can easily escape through the air bubble outlet 31, thus minimizing obstruction of the field of view. Furthermore, the inner opening surface 312 is formed to be larger than the outer opening surface 311, which ensures sufficient space for air bubbles to be easily discharged from the air bubble outlet 31, while also making it easier to prevent pieces of meat from entering the inside of the hood through the air bubble outlet 31.

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

[0102] Furthermore, the area of ​​the inner opening surface 312 is preferably 11 mm². 2 More preferably 13.5 mm 2 More preferably 16 mm 2 More preferably 19 mm 2 More preferably 22 mm 2 That's all. By adopting the above configuration, it is possible to ensure a sufficient width for air bubbles to be easily discharged from the air bubble outlet 31, while also making it easier to prevent tissue fragments from entering the inside of the hood through the air bubble outlet 31.

[0103] Furthermore, the area of ​​the inner opening surface 312 is preferably 50 mm². 2 More preferably 25mm 2 The following is acceptable. By adopting the above configuration, it is possible to suppress the ingress of tissue fragments and other materials generated during the procedure through the inner opening surface 312.

[0104] A more preferred form when the inner opening surface 312 is rectangular will be described below.

[0105] The widthwise length of the inner opening surface 312 is preferably 2 mm or more, more preferably 2.5 mm or more, and more preferably 3 mm or more. By adopting the above configuration, air bubbles that have entered the hood 1 for the endoscope device can be discharged more reliably.

[0106] Furthermore, the length of the inner opening surface 312 in the width direction 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 configuration, it is possible to suppress the ingress of tissue fragments and other materials generated during the procedure through the air bubble outlet 31.

[0107] A more preferred embodiment of the configuration of the protruding portion 3 of the endoscopic device hood 1 will be described below with reference to Figure 13 (the bubble outlet 31 is omitted).

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

[0109] Furthermore, in the front view of the embodiment shown in Figure 13, the protruding portion 3 has a mounting direction indicator mark 322 on the surface facing the lower end portion 321 of the tip opening. This configuration makes it less likely for the treatment instrument to come into contact with the tip opening 32.

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

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

[0112] Here, if 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 in such a way that the length of the line segment is the shortest possible (see Figure 13). Furthermore, if a bubble outlet 31 is provided on the opposite portion of the lower end portion 321 of the tip opening, it is preferable that the tip opening 32 and the bubble outlet 31 are connected in such a way that the length of the line segment is minimized.

[0113] The preferred embodiments shown in Figures 12 and 13 can be described by referring to the above explanation.

[0114] This invention allows for the manufacture of an endoscopic device hood 1 suitable for immersion endoscopic surgery by using a prepared mold to shape the material into a desired form. Furthermore, this invention also makes it possible to manufacture an endoscope device hood 1 suitable for immersion endoscopic surgery by using a tool (router, etc.) to form a bubble outlet 31 on a commercially available endoscope device hood 1 (see Figure 1) that has been properly obtained, smoothing the inner surface of the endoscope device hood 1, and then applying a hydrophilic coating. [Examples]

[0115] <1> Manufacturing of hood 1 for endoscope equipment (1) Example 1 We manufactured an endoscope hood 1 with the design shown in Table 1 below. The manufactured endoscopic device hood 1 is shown in Figures 2 and 3.

[0116] [Table 1]

[0117] (2) Example 2 We manufactured an endoscope hood 1 with the design shown in Table 2 below. The manufactured endoscopic device hood 1 is shown in Figures 4 and 5.

[0118] [Table 2]

[0119] (3) Example 3 We manufactured an endoscope hood 1 with the design shown in Table 3 below. The manufactured endoscopic device hood 1 is shown in Figures 6 and 7.

[0120] [Table 3]

[0121] (4) Example 4 We manufactured an endoscope hood 1 with the design shown in Table 4 below. The manufactured endoscopic device hood 1 is shown in Figures 8 and 9.

[0122] [Table 4]

[0123] <2> Verification of bubble removal capacity The manufactured endoscopic device hood 1 was attached to the endoscopic device X (see Figure 10), and immersion endoscopic surgery was performed. As a result, it was confirmed that air bubbles generated during the procedure were efficiently released from the air bubble outlet 31. In other words, it was found that by using the endoscopic device hood 1 of this embodiment, air bubbles generated during the procedure can be efficiently discharged from the endoscopic device hood 1.

[0124] This is thought to be because the bubble outlet 31 is rectangular and its width is 2 mm or more, allowing it to pass through sufficiently with the bubbles generated during the procedure.

[0125] Furthermore, the width of the bubble outlet 31 is 2 mm or more and 3 mm or less. It was also found that by having a longitudinal length of 10 mm or less of the aforementioned bubble outlet 31, it is possible to prevent the entry of cut pieces of meat or the like through the bubble outlet 31.

[0126] Furthermore, the protruding portion 3 has two or more bubble outlets 31 in the circumferential direction, By setting the distance between the bubble outlets 31 to 2 mm or more, it was found that the overall strength of the endoscopic device hood 1 is maintained, and that the bubbles escape from the bubble outlets 31 due to buoyancy, regardless of the orientation of the endoscope device X (see Figure 11). [Industrial applicability]

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

[0128] 1. Hood for endoscope equipment 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 Mounting Direction Indicator Sign 33 Liquid outlet 34. Instrument Guidance Mechanism X Endoscope

Claims

1. A hood for an endoscope device that is applicable to endoscopic surgery performed under flood conditions using an electrosurgical unit, A mounting part that can be connected to the tip of the endoscope device, A protruding portion extending from the aforementioned mounting portion, It has, The protruding portion is provided with two or more bubble outlets spaced apart from each other in the circumferential direction of the protruding portion. Hood for endoscope equipment.

2. The hood for an endoscope device according to claim 1, wherein the bubble outlet is provided at approximately the base end of the protruding portion.

3. The hood for an endoscope device according to claim 1 or 2, wherein the length of the protruding portion is 2 mm or more and 10 mm or less.

4. The hood for an endoscope device according to any one of claims 1 to 3, wherein the length of the protruding portion is 5 mm or more and 10 mm or less.

5. The hood for an endoscope device according to any one of claims 1 to 4, wherein the opening diameter of the base end of the protruding portion is 15 mm or less in diameter.

6. The hood for an endoscope device according to any one of claims 1 to 5, wherein the protruding portion extends from the mounting portion in a tapered cylindrical shape.

7. The hood for an endoscope device according to any one of claims 1 to 6, wherein the opening diameter of the tip of the protruding part is 10 mm or less in diameter.

8. The hood for an endoscope device according to any one of claims 1 to 7, wherein the distance between the bubble outlets is 5 mm or less.

9. The hood for an endoscope device according to any one of claims 1 to 8, wherein the bubble outlet has an inner opening surface that is larger than the outer opening surface.

10. The bubble outlet is rectangular. The width of the bubble outlet is 5 mm or less. The longitudinal length of the aforementioned bubble outlet is 10 mm or less. A hood for an endoscope device according to any one of claims 1 to 9.

11. The aforementioned protrusion is equipped with a liquid outlet, The area of ​​the liquid outlet is 2.25 mm². ２ The following is: A hood for an endoscope device according to any one of claims 1 to 10.

12. A hood for an endoscope device according to any one of claims 1 to 11, comprising a rigid portion between the mounting portion and the protruding portion.

13. The tip opening of the aforementioned protruding portion has a lower end portion of the tip opening, The protruding portion has a mounting direction indicator mark at a position opposite to the lower end of the tip opening, and is formed such that the lower end of the tip opening is larger than a true circle corresponding to the radius of curvature of the upper end. A hood for an endoscope device according to any one of claims 1 to 12.

14. The area of ​​the aforementioned bubble outlet is 10 mm². ２ 50mm or more ２ The following is a hood for an endoscope device according to any one of claims 1 to 13.

15. The area of ​​the aforementioned bubble outlet is 15 mm². ２ 50mm or more ２ The following is a hood for an endoscope device according to any one of claims 1 to 14.

16. The area of ​​the aforementioned bubble outlet is 18 mm². ２ 50mm or more ２ The following is a hood for an endoscope device according to any one of claims 1 to 15.

17. An endoscopic device applicable to endoscopic surgery under flooding using an electrosurgical unit, It is equipped with a protrusion extending from the tip of the endoscope device, The protruding portion is provided with two or more bubble outlets spaced apart from each other in the circumferential direction of the protruding portion. Endoscope equipment.

Images