Digestive Tract Trainer

Abstract

To provide a digestive tract trainer which provides feeling close to actual resection and stitching when resecting a simulated polyp using treatment tools such as snares and biopsy biceps and when suturing an ulcer using a clip and the like during polypectomy training and ulcer suturing training.SOLUTION: A digestive tract trainer 1 is provided, comprising a simulated digestive tissue layer 10 made of an elastic material, a simulated lesion portion 20 formed on an upper surface of the simulated digestive tissue layer 10, and a thin layer portion 30 constituting a part of the simulated digestive tissue layer 10, where at least a portion of the simulated digestive tissue layer around a portion where the simulated lesion portion 20 is formed has a thickness less than that of the rest.SELECTED DRAWING: Figure 1

Description

【Technical Field】 【0001】 The present invention relates to a gastrointestinal trainer capable of performing polyp resection that occurs in the gastrointestinal tract of humans and animals and shrinkage training of ulcers formed in the polyp resection area. 【Background Art】 【0002】 Conventionally, as a simulator for polyps for training practical polyp resection, there is a polyp resection trainer that mimics the shape of a polyp using a highly water-absorbent resin such as polyvinyl alcohol (see, for example, Patent Document 1). 【Prior Art Documents】 【Patent Documents】 【0003】 【Patent Document 1】 Utility Model Registration No. 3184695 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0004】 In actual polyp resection, the base of the polyp is constricted with a special wire called a snare, or lifted with biopsy forceps, and a high-frequency current is passed through to perform resection. However, in such a polyp resection trainer, a flange portion having a diameter larger than the diameter of the hole provided in the gastrointestinal tract model is provided at the lower end of the simulated polyp, and the simulated polyp is pushed into the hole provided in the gastrointestinal tract model and fixed by the flange portion. 【0005】 Therefore, there is a problem that the resistance felt when constricting or lifting the base of the simulated polyp with a snare or biopsy forceps is different from the resistance when constricting or lifting the base of an actual polyp, and training for polyp resection closer to the actual situation cannot be performed. 【0006】 ​Furthermore, these polyp removal trainers only simulate polyps in the digestive tract, but do not simulate the ulcers that form when the polyps are removed. This presents a challenge in that they do not allow for training in suturing the ulcers that result from polyp removal. 【0007】 This invention has been made in view of these problems, and aims to provide a gastrointestinal trainer that closely replicates the sensation of actual polyp removal and suturing when removing simulated polyps using instruments such as snares and biopsy forceps, and suturing ulcers using clips, etc., during polyp removal training and ulcer suturing training. [Means for solving the problem] 【0008】 The present invention has been made to solve at least some of the above-mentioned problems and can be realized in the following application examples. The reference numerals and supplementary explanations in parentheses in this section are provided to aid in understanding the present invention and correspond to the embodiments described later; they do not limit the present invention in any way. 【0009】 [Application Example 1] The invention described in Application Example 1 is, A simulated digestive tissue layer (10) formed from an elastic material, The simulated lesion (20) formed on the upper surface of the simulated digestive tissue layer (10), In the simulated digestive tissue layer (10), the thickness around the portion where the simulated lesion (20) is formed is, The portion directly below the simulated lesion (20) and A thin layer (30) is formed to be thinner than the thickness of the other parts, This is a gastrointestinal trainer (1) whose main feature is that it is equipped with the following: 【0010】 In such a gastrointestinal trainer (1), a simulated lesion (20) is formed on the upper surface of the simulated digestive tissue layer (10), and the thickness of the simulated digestive tissue layer (10) around the area where the simulated lesion (20) is formed is thinner than that of other areas. 【0011】 This reduces the resistance felt when constricting the base of the simulated lesion (20) with a snare or biopsy forceps, or when suturing the simulated lesion (20), during training in the removal of polyps in the digestive tract or suturing ulcers formed in the polyp removal area. 【0012】 Therefore, it closely resembles the sensation of constricting the base of a lesion in the digestive tract of an actual human or animal with a snare or biopsy forceps, or pulling and suturing the area around the lesion. 【0013】 [Application Example 2] The gastrointestinal trainer (1) described in Application Example 2 is In the gastrointestinal trainer (1) described in Application Example 1, The gist of this invention is that the simulated lesion (20) is formed in a convex shape so as to protrude from the upper surface of the simulated digestive tissue layer (10). 【0014】 In this type of gastrointestinal trainer (1), the simulated lesion (20) is formed in a convex shape, rising from the upper surface of the simulated digestive tissue layer (10), thereby simulating a polyp that has formed in the gastrointestinal tract. 【0015】 This allows for training in removing polyps in the digestive tract using a snare or biopsy forceps with the gastrointestinal trainer (1). 【0016】 In such simulated polyps, the thickness around the area where the simulated polyp is formed is thinner than the thickness of other areas. This reduces the resistance when constricting the base of the simulated polyp, resulting in a sensation closer to that of constricting the base of a polyp in the digestive tract of an actual human or animal. 【0017】 [Application Example 3] The gastrointestinal trainer (1) described in Application Example 3 is, In the gastrointestinal trainer (1) described in Application Example 1, The gist of this invention is that the simulated lesion (20) is formed in a concave shape so as to be scooped out from the upper surface of the simulated digestive tissue layer (10). 【0018】 In such a gastrointestinal trainer (1), the simulated lesion part (20) is formed in a concave shape so as to penetrate the upper surface of the simulated digestive tissue layer (10), thereby simulating the ulcer formed after polyp resection. 【0019】 Even in such a simulated ulcer, since the thickness around the part where the simulated ulcer is formed is thinner than the thickness of other parts, the resistance when pulling together the surroundings of the simulated ulcer during shrinkage of the simulated ulcer becomes smaller, and it becomes close to the feeling when pulling together the surroundings of the ulcer formed in the digestive tract of an actual human or animal. 【0021】 In such a gastrointestinal trainer (1), in the simulated digestive tissue layer (10), not only the part corresponding to the periphery of the part where the simulated lesion part (20) is formed, but also the thickness of the simulated digestive tissue layer (10) corresponding to the part directly below where the simulated lesion part (20) is formed is formed thinner than the thickness of other parts. By forming a space inside, the thickness of the thin layer part (30) becomes thinner. 【0022】 As a result, in the simulated digestive tissue layer (10), not only the periphery where the simulated lesion part (20) is formed, but also the thickness of the part directly below it is thinner than the thickness of other parts. Therefore, the resistance when constricting the base of the simulated polyp or pulling together the surroundings of the simulated ulcer becomes smaller, and training can be performed in accordance with the state of polyps and ulcers formed in the digestive tract of an actual human or animal. 【0023】 [Application Example 4 Application Example 4 The gastrointestinal trainer (1) described in the Application Example Choose one of the following: 1 to 3. In the gastrointestinal trainer (1) described in the The gist is that the thin layer part (30) is formed thinner than the thickness of other parts of the simulated digestive tissue layer (10) by the lower surface of the simulated digestive tissue layer (10) being hollowed out in a concave shape. 【0024】 ​ In this type of gastrointestinal trainer (1), the simulated digestive tissue layer (10) is indented in a concave shape in order to form a thin layer (30) that is thinner than other parts of the simulated digestive tissue layer (10). 【0025】 In this way, the formation of a thin layer (30) reduces the resistance when constricting the base of a simulated polyp or pulling the area around a simulated ulcer, allowing for training that closely resembles the sensation of removing polyps or suturing ulcers in the digestive tract of actual humans or animals. [Brief explanation of the drawing] 【0026】 [Figure 1] This is a schematic cross-sectional view of the portion where a simulated polyp is formed in the first embodiment. [Figure 2] This figure shows various schematic shapes of a simulated polyp. [Figure 3] This is a schematic cross-sectional view of the simulated polyp formation portion in the second embodiment. [Figure 4] This is a schematic cross-sectional view of the simulated polyp formation portion in the third embodiment. [Figure 5] This is a schematic cross-sectional view of the case in which a thin layer is formed directly below the simulated polyp as in the first to third embodiments. [Figure 6] This is a schematic cross-sectional view of the simulated ulcer formation area in the fifth embodiment. [Figure 7] This is a schematic cross-sectional view of the simulated ulcer formation area in the sixth embodiment. [Figure 8] This is a schematic cross-sectional view of the simulated ulcer formation area in the seventh embodiment. [Figure 9] This is a schematic cross-sectional view of the case in the 5th to 7th embodiments where a thin layer is formed directly beneath the formation of a simulated ulcer. [Figure 10] This figure shows the schematic shape of a gastrointestinal trainer with multiple simulated polyps and ulcers formed on it. [Modes for carrying out the invention] 【0027】 The embodiments to which the present invention is applied will be described below with reference to the drawings. However, the embodiments of the present invention are not limited to those described below, and various forms are possible as long as they fall within the technical scope of the present invention. 【0028】 [First Embodiment] Based on Figure 1, the configuration of the gastrointestinal trainer 1 in the first embodiment will be described. Figure 1 is a schematic cross-sectional view of the simulated polyp formation portion in the first embodiment. 【0029】 As shown in Figure 1, the gastrointestinal trainer 1 comprises a simulated digestive tissue layer 10, a simulated lesion 20, and a thin layer 30. The gastrointestinal trainer 1 is integrally molded using a single elastic material. 【0030】 The simulated digestive tissue layer 10 is a layer that simulates the digestive tissue of humans and animals, and is formed in a flat plate shape using a high-water-content resin such as polyvinyl alcohol. The dimensions of the simulated digestive tissue layer 10 are 100 mm (length) x 100 mm (width) x 3 mm (height). 【0031】 Furthermore, the lower surface of the simulated digestive tissue layer 10 has a concave portion 11 that is 10 mm wide and 2 mm deep, in the area corresponding to the area around the base where the simulated lesion 20, described later, is formed on the upper surface of the simulated digestive tissue layer 10. 【0032】 The simulated lesion 20 is formed to protrude from the upper surface of the simulated digestive tissue layer 10 and is a part that simulates a polyp. It is made of a high-water-content resin such as polyvinyl alcohol and is formed in a mushroom-like shape with a stalked base. 【0033】 The thin layer 30 is the portion of the simulated digestive tissue layer 10 that surrounds the area where the simulated lesion 20, which simulates a polyp, is formed. Because the lower surface of the simulated digestive tissue layer 10 is concave, the area around the base of the simulated lesion 20 is 1 mm thick, while the other parts of the simulated digestive tissue layer 10 are 3 mm thick. 【0034】 Next, the shape of the simulated lesion 20, which simulates a polyp, will be described based on Figure 2. Figure 2 is a diagram showing various schematic shapes of a simulated polyp. 【0035】 Simulated polyps can form in a variety of shapes, including the stalked type (mushroom-shaped projection with a constricted base) as shown in Figure 1 (Figure 2(A)), as well as the stemless type (hemispherical elevation with no constriction at the base) as shown in Figure 2(B), the disc-shaped type (low and flat projection), as shown in Figure 2(C), and the elevated + concave type (multiple depressions within the projection of the stemless or disc-shaped type) as shown in Figure 2(D). 【0036】 (Features of the Gastrointestinal Trainer 1) In this type of gastrointestinal trainer 1, simulated polyps are formed that mimic polyps of various shapes (pedunculated, sessile, flat disc, and raised + concave), and the thickness of the simulated digestive tissue layer 10 in the area surrounding the part where the simulated polyps are formed on the upper surface of the simulated digestive tissue layer 10 is thinner than the thickness of other parts. 【0037】 This reduces the resistance when constricting the base of the simulated polyp with a snare or picking it up with biopsy forceps. As a result, the sensation of removing a real polyp from a human or animal with a snare or biopsy forceps becomes closer to that of actual polyps, allowing for polyp removal training with a realistic feel. 【0038】 Furthermore, since the gastrointestinal trainer 1 is made of a high-water-content resin such as polyvinyl alcohol, it becomes possible to pass high-frequency current through the simulated polyp. 【0039】 This allows for training not only in techniques for removing polyps without applying electricity (cold snare polypectomy and cold forceps polypectomy), but also in techniques for removing polyps using high-frequency current (polypectomy and hot biopsy). 【0040】 [Second Embodiment] Based on Figure 3, the configuration of the gastrointestinal trainer 1 in the second embodiment will be described. Figure 3 is a schematic cross-sectional view of the simulated polyp formation portion in the second embodiment. 【0041】 In addition, since the gastrointestinal trainer 1 in the second embodiment and the third and fourth embodiments described later have a similar structure to the gastrointestinal trainer 1 in the first embodiment, the same reference numerals are used for the same components, and their descriptions are omitted. 【0042】 As shown in Figure 3, in the second embodiment, the gastrointestinal trainer 1 has a 3 mm thick simulated digestive tissue layer 10, and at a position 2 mm from the bottom surface, only the area corresponding to the base of the simulated polyp formed in the simulated digestive tissue layer 10 is cut horizontally with a width of 10 mm (cut section 12). As a result, the simulated digestive tissue layer 10 is separated vertically only within the range of the cut section 12. 【0043】 As a result, in the simulated digestive tissue layer 10, the thickness around the base where the simulated polyp is formed is 3 mm, the same as the thickness of the other parts, but the simulated digestive tissue layer 10 is separated into two parts vertically, and the thickness of the thin layer 30 is 1 mm, which is thinner than the 3 mm thickness of the other parts of the simulated digestive tissue layer 10. 【0044】 This reduces the resistance when constricting the base of the simulated polyp with a snare or picking it up with biopsy forceps, allowing polyp removal training to be performed with a feel similar to that of the gastrointestinal trainer 1 in the first embodiment. 【0045】 [Third Embodiment] Based on Figure 4, the configuration of the gastrointestinal trainer 1 in the third embodiment will be described. Figure 4 is a schematic cross-sectional view of the simulated polyp formation portion in the third embodiment. 【0046】 As shown in Figure 4, in the third embodiment, the gastrointestinal trainer 1 has a space 13 with a height of 1 mm in the vertical direction of the simulated digestive tissue layer 10, which is a flat plate-shaped simulated digestive tissue layer 10 with a thickness of 3 mm, and is formed in an area corresponding to 10 mm around the base of the simulated polyp that is formed in the simulated digestive tissue layer 10. 【0047】 As a result, the thickness of the thin layer 30 becomes 1 mm, which is thinner than the 3 mm thickness of the other parts of the simulated digestive tissue layer 10. 【0048】 Therefore, the resistance when constricting the base of the simulated polyp with a snare or picking it up with biopsy forceps is reduced, and polyp removal training can be performed with a sensation close to that of the actual procedure, similar to the gastrointestinal trainer 1 in the first embodiment. 【0049】 [Fourth Embodiment] Based on Figure 5, the configuration of the gastrointestinal trainer 1 in the fourth embodiment will be described. Figure 5 is a schematic cross-sectional view of the gastrointestinal trainer 1 in the first to third embodiments, in which a thin layer is formed directly below where a simulated polyp is formed. 【0050】 Figure 5(A) is a schematic cross-sectional view of the gastrointestinal trainer 1 in the first embodiment in which a thin layer 30 is formed directly below where a simulated polyp is formed. Figure 5(B) is a schematic cross-sectional view of the gastrointestinal trainer 1 in the second embodiment in which a thin layer 30 is formed directly below where a simulated polyp is formed. Figure 5(C) is a schematic cross-sectional view of the gastrointestinal trainer 1 in the third embodiment in which a thin layer 30 is formed directly below where a simulated polyp is formed. 【0051】 As shown in Figure 5, in the fourth embodiment, the gastrointestinal trainer 1 has a thin layer 30 that extends not only to the area corresponding to 10 mm around the base where the simulated polyp is formed in the simulated digestive tissue layer 10, but also to directly below where the simulated polyp is formed. 【0052】 As a result, in the simulated digestive tissue layer 10, the thickness is thinner not only around the simulated lesion 20 but also directly below it compared to other areas. This reduces the resistance when constricting the base of the simulated polyp, allowing for training that closely matches the condition of polyps and ulcers in the digestive tracts of actual humans and animals. 【0053】 [Fifth Embodiment] Based on Figure 6, the configuration of the gastrointestinal trainer 1 in the fifth embodiment will be described. Figure 6 is a schematic cross-sectional view of the simulated polyp formation portion in the fifth embodiment. 【0054】 Furthermore, since the gastrointestinal trainer 1 in the fifth embodiment and the sixth to eighth embodiments described later have a similar structure to the gastrointestinal trainer 1 in the first embodiment, the same reference numerals are used for the same components, and their descriptions are omitted. 【0055】 As shown in Figure 6, in the fifth embodiment, the gastrointestinal trainer 1 has a simulated ulcer formed on the upper surface of the simulated digestive tissue layer 10 instead of a simulated polyp as in the first to fifth embodiments. 【0056】 This makes it possible to perform ulcer suturing training in cases where ulcers develop after polyp removal. In the first embodiment, the thickness of the portion of the simulated digestive tissue layer 10 corresponding to the base where the simulated polyp is formed is made thin, and in the fifth embodiment, the thickness of the portion corresponding to the area around the simulated ulcer is made thin. 【0057】 This reduces the resistance when pulling the edges of a simulated ulcer together during suturing, allowing ulcer suturing training to be performed with a realistic feel, similar to the gastrointestinal trainer 1 in the first embodiment. 【0058】 [Sixth Embodiment] The configuration of the gastrointestinal trainer 1 in the sixth embodiment will be described based on Figure 7. Figure 7 is a schematic cross-sectional view of the simulated ulcer formation area in the sixth embodiment. Since the gastrointestinal trainer 1 in the sixth embodiment has a similar structure to the gastrointestinal trainer 1 in the first embodiment, the same reference numerals are used for the same components, and their descriptions are omitted. 【0059】 As shown in Figure 7, the gastrointestinal trainer 1 in the sixth embodiment, like the gastrointestinal trainer 1 in the second embodiment, has a cut portion 12 in the region corresponding to the area around the base where a simulated ulcer is formed in the simulated digestive tissue layer 10. 【0060】 This allows ulcer suturing training to be performed with a realistic feel, similar to the gastrointestinal trainer 1 in the fifth embodiment. 【0061】 [Seventh Embodiment] The configuration of the gastrointestinal trainer 1 in the seventh embodiment will be described based on Figure 8. Figure 8 is a schematic cross-sectional view of the simulated ulcer formation area in the seventh embodiment. Since the gastrointestinal trainer 1 in the seventh embodiment has a similar structure to the gastrointestinal trainer 1 in the first embodiment, the same reference numerals are used for the same components, and their descriptions are omitted. 【0062】 As shown in Figure 8, in the seventh embodiment, the gastrointestinal trainer 1, similar to the gastrointestinal trainer 1 in the third embodiment, has a space 13 with a height of 1 mm in the vertical direction of the simulated digestive tissue layer 10, but only in the area corresponding to the area around the base where the simulated ulcer is formed in the simulated digestive tissue layer 10. 【0063】 This allows ulcer suturing training to be performed with a realistic feel, similar to the gastrointestinal trainer 1 in the fifth embodiment. 【0064】 [Eighth Embodiment] Based on Figure 9, the configuration of the gastrointestinal trainer 1 in the eighth embodiment will be described. Figure 9 is a schematic cross-sectional view of the case in which a thin layer is formed directly below where a simulated ulcer was formed in the fifth to seventh embodiments. 【0065】 Figure 9(A) is a schematic cross-sectional view of the gastrointestinal trainer 1 in the fifth embodiment, in which a thin layer 30 is formed directly below where a simulated ulcer is formed. Figure 9(B) is a schematic cross-sectional view of the gastrointestinal trainer 1 in the sixth embodiment, in which a thin layer 30 is formed directly below where a simulated ulcer is formed. Figure 9(C) is a schematic cross-sectional view of the gastrointestinal trainer 1 in the seventh embodiment, in which a thin layer 30 is formed directly below where a simulated ulcer is formed. 【0066】 Since the gastrointestinal trainer 1 in the eighth embodiment has a similar structure to the gastrointestinal trainer 1 in the fifth to seventh embodiments, the same reference numerals are used for the same components, and their descriptions are omitted. 【0067】 As shown in Figure 9, in the eighth embodiment, the gastrointestinal trainer 1, in the fifth to seventh embodiments, has a thin layer 30 that extends not only to the area corresponding to 10 mm around the base where the simulated ulcer is formed in the simulated digestive tissue layer 10, but also to directly below where the simulated ulcer is formed. 【0068】 As a result, in the simulated digestive tissue layer (10), the thickness of the area directly beneath the simulated ulcer, as well as the area around it, is thinner than the thickness of other areas. This reduces the resistance when pulling the area around the simulated ulcer, allowing for training that closely matches the condition of polyps and ulcers in the digestive tract of actual humans and animals. 【0069】 [Other embodiments] (1) The number of simulated polyps and simulated ulcers formed on the simulated digestive tissue layer 10 may be one, or multiple simulated polyps and simulated ulcers of various shapes and sizes may be formed, as shown in Figure 10. 【0070】 This allows for training in the removal of polyps of various shapes and sizes, as well as training in the suturing of ulcers after polyp removal, without having to change the gastrointestinal trainer 1, enabling efficient implementation of polyp removal training and ulcer suturing training. 【0071】 (2) In the above embodiment, the gastrointestinal trainer 1 is integrally molded using a single elastic material, but even if the same elastic material is used, the simulated polyp and the simulated digestive tissue layer 10 may be formed separately, and then the simulated polyp may be fixed to the simulated digestive tissue layer 10. 【0072】 Alternatively, the simulated digestive tissue layer 10 and the simulated polyp may be formed using separate elastic materials, and then the simulated polyp may be fixed to the simulated digestive tissue layer 10. Furthermore, the simulated digestive tissue layer 10 itself may be made up of multiple layers formed from different elastic materials. 【0073】 (3) In the above embodiment, a high-water-content resin such as polyvinyl alcohol is used as the elastic material for the simulated digestive tissue layer 10 and the simulated polyp, but synthetic rubber such as silicone or polyurethane, natural rubber, water-soluble gel, or a material mainly composed of mannan may also be used. 【0074】 (4) In the above embodiment, the simulated digestive tissue layer 10 is a flat plate with dimensions of 100 mm (length) x 100 mm (width) x 3 mm (thickness). However, the shape of the simulated digestive tissue layer 10 does not have to be square, and can be various shapes such as rectangles or circles. 【0075】 Furthermore, the dimensions in the length and width directions can be smaller or larger than these. (5) In the above embodiment, the shape of the simulated polyp formed on the simulated digestive tissue layer 10 is described as pedunculated, sessile, flat disc, or raised + concave, but it can take on a variety of other shapes. 【0076】 (6) In the above embodiment, the thickness of the simulated digestive tissue layer 10 is 3 mm and the thickness of the thin layer portion 30 is 1 mm. However, the thickness of the simulated digestive tissue layer 10 and the thin layer portion 30 may be changed depending on the purpose of polyp resection training or ulcer suturing training. 【0077】 (7) In the above embodiment, the horizontal width of the concave portion 11, the cut portion 12, and the space 13 around the base where the simulated lesion portion 20 is formed is 10 mm from the base of the simulated lesion portion 20, but it may be smaller or larger than 10 mm. 【0078】 Reducing the width increases the resistance when squeezing the base of a simulated polyp or pulling the edges of a simulated ulcer, while increasing the width reduces the resistance when squeezing the base of a simulated polyp or pulling the edges of a simulated ulcer. Therefore, it can be adjusted according to the purpose of polyp removal training or ulcer suturing training. 【0079】 (8) In the above embodiment, the simulated digestive tissue layer 10 is in the shape of a flat plate, but it may be formed into various shapes, such as by rolling it into a tubular shape so that the surface on which the simulated lesion 20 is formed is on the inner surface, in order to simulate the shape of the actual digestive tract of a human or animal. 【0080】 (9) In addition, in the simulated digestive tissue layer 10, the parts of the surface on which the simulated lesion 20 is formed that do not contain the simulated lesion 20 do not need to be flat, and may have an uneven surface like actual digestive tissue. [Explanation of Symbols] 【0081】 1...Gastrointestinal trainer, 10...Simulated digestive tissue layer, 11...Concave area, 12...Cut section, 13...Space, 20...Simulated lesion area, 30...Thin layer

Claims

[Claim 1] A simulated digestive tissue layer formed from an elastic material, The simulated lesion formed on the upper surface of the simulated digestive tissue layer, In the simulated digestive tissue layer, a thin layer is formed in which the thickness around at least the portion where the simulated lesion is formed is thinner than the thickness of the portion directly below the simulated lesion and other portions. A digestive tract trainer characterized by having the following features. [Claim 2] In the gastrointestinal trainer according to claim 1, The digestive tract trainer is characterized in that the simulated lesion portion is formed in a convex shape so as to protrude from the upper surface of the simulated digestive tissue layer. [Claim 3] In the gastrointestinal trainer according to claim 1, The digestive tract trainer is characterized in that the simulated lesion area is formed in a concave shape so that the upper surface of the simulated digestive tissue layer is scooped out. [Claim 4] In the gastrointestinal trainer according to any one of claims 1 to 3, The digestive tract trainer is characterized in that the thin layer is formed to be thinner than the thickness of other parts of the simulated digestive tissue layer by carving out the lower surface of the simulated digestive tissue layer in a concave shape.

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