Traction capsule stomach tube and use method thereof

Abstract

The invention discloses a traction capsule stomach tube and a using method thereof, and the traction capsule stomach tube comprises an instant capsule shell which is made of water-soluble food-grade gelatin and can be dissolved in the stomach; a thin hole is formed in the near end side of the instant capsule shell; a channel with two open ends is formed in the film stomach tube; a plurality of side holes are formed in the far-end side of the thin-film stomach tube in a staggered mode, and a cutting line is arranged on the near-end side of the thin-film stomach tube. The thin-film stomach tube can be coiled and folded; the guide ball head wraps the far-end side of the thin-film stomach tube and enables the far-end side opening of the thin-film stomach tube to be kept in an open state; the guide ball head is made of a water-soluble hard candy ball and can be dissolved in the stomach, and the dissolving time of the guide ball head is longer than that of the instant capsule shell; the prompter is arranged on the near-end side of the thin-film stomach tube, and the position where the thin-film stomach tube reaches is prompted through color changes generated by the acid-base reaction.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a traction capsule gastric tube and its method of use. Background Technology

[0002] For some patients who have undergone gastrointestinal surgery and have poor digestive function, especially those who have undergone esophageal surgery, it is often necessary to provide nutrition and medication, decompression of the gastrointestinal tract, drainage, or protection of the surgical wound. The usual practice is to place a gastric tube in these patients, which extends beyond the surgical site in the gastrointestinal tract, in order to establish a connection channel between the surgical site in the gastrointestinal tract and the external environment.

[0003] In clinical practice, it is common to insert a gastric tube into the stomach cavity through the patient's nostrils or mouth. The long gastric tube requires the patient's own swallowing function to work in sync with the medical staff to push it until the placement of the gastric tube is completed. During this process, the tube will constantly come into contact with and rub against the throat and pharynx, which may stimulate a vomiting reflex. The entire process of placing the gastric tube is very painful for the patient.

[0004] Long-term indwelling of a nasogastric tube can easily damage the closing function of the epiglottis and the cardia, increasing the risk of reflux and aspiration. Similarly, since the nasogastric tube extends through the nostril, it occupies one side of the nasal passage, which can easily cause breathing discomfort for the patient. Summary of the Invention

[0005] This invention provides a traction capsule gastric tube and its usage method, which is simple to operate, can quickly establish a channel, and protect structures such as the cardia and epiglottis, as well as surgical wounds in the digestive tract.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0007] A traction capsule gastric tube includes: a soluble capsule shell made of water-soluble, food-grade gelatin that dissolves in the stomach; a fine pore on the proximal side of the soluble capsule shell; a thin-film gastric tube forming a channel with openings at both ends; several side holes offset on the distal side of the thin-film gastric tube; a cutting line on the proximal side of the thin-film gastric tube; the thin-film gastric tube can be coiled and folded; and a guide ball head that wraps around the distal side of the thin-film gastric tube and keeps the distal opening open; the guide ball head is made of water-soluble hard candy ball that dissolves in the stomach and guides... The dissolution time of the bulb is longer than that of the instant capsule shell; the indicator is located on the proximal side of the membrane gastric tube, and uses a color change produced by an acid-base reaction to indicate the position of the membrane gastric tube; the traction line is fixed to the membrane gastric tube by heat welding at the distal end above the cutting line, and the traction line can be separated from the membrane gastric tube through the cutting line; the traction line has evenly distributed scale markings; the proximal side of the traction line has a loop for placing the operator's fingers; the traction line can pass through the fine holes of the instant capsule shell; the inner cavity of the instant capsule shell can accommodate the folded membrane gastric tube, the guide bulb, and the indicator.

[0008] Preferably, the folding method of the thin-film gastric tube is as follows: the two ends of the thin-film gastric tube are placed in opposite directions, the tube body on the proximal side and the tube body on the distal side of the thin-film gastric tube are folded symmetrically in a parallel manner and placed in the center to form a central bundle; the tube body on the proximal side and the distal side of the thin-film gastric tube is spirally coiled around the central bundle to form a bundle.

[0009] Preferably, after the film gastric tube is folded, the proximal end of the film gastric tube connected to the traction wire is placed towards the proximal end of the instant capsule shell, and the distal end of the film gastric tube connected to the guide ball head is placed towards the distal end of the instant capsule shell.

[0010] Preferably, the thin-film gastric tube is made of polyurethane or silicone material.

[0011] Preferably, the indicator consists of two symmetrically arranged hinges, at least one of which has an acid-base reaction zone that can change color. The two hinges clamp the distal end of the traction wire and are fixed to the thin-film gastric tube by heat bonding.

[0012] Preferably, the indicator is yellow when it is not in contact with acidic substances, and the hydrogen ions in the gastric solution will cause the acidic indicator in the acid-base reaction zone to appear red or reddish; the acidic indicator is an acidic indicator containing methyl red.

[0013] Preferably, the traction line is made of polyester fiber material, and the traction line is marked with scale marks every 5 centimeters.

[0014] Preferably, the size of the guide ball head is no more than 10 mm, and its dissolution time in the stomach is 15-30 minutes; the length of the instant-dissolving capsule shell is no more than 28 mm, the diameter is no more than 33 mm, the wall thickness is no more than 0.12 mm, and its dissolution time in the stomach is 30-60 seconds.

[0015] Preferably, it also includes an installation connection structure, which includes a threaded seat, a tapered opening, and a nut ring. The threaded seat is connected to an external supply pipe. The tapered opening is a cone shape with an elliptical bottom, and is divided into two symmetrical halves from the edge of the minor axis of the ellipse to the apex. Each half is connected to the edge of the threaded seat through an elastic rib. The tapered opening can pass through the interior of the thin-film gastric tube. The nut ring can be sleeved on the outside of the thin-film gastric tube and pushed in to contact the edge of the major axis of the ellipse. As the nut ring is pushed in, it squeezes the bottom of the tapered opening and transmits force until the elastic rib deforms and bends in a direction away from the axial direction. At the same time, the two halves of the tapered opening are squeezed open by the nut ring and support the proximal side of the thin-film gastric tube until the two halves are fully opened and the nut ring is rotated into the threaded seat.

[0016] To achieve the above-mentioned objectives, the present invention also provides the following technical solutions:

[0017] A method for using a traction capsule gastric tube, comprising: Step S1: placing the proximal end of the traction line externally and swallowing the capsule gastric tube orally; Step S2: dissolving the rapidly dissolving capsule shell of the capsule gastric tube in the stomach, releasing the thin-film gastric tube, guide bulb, and indicator contained within the inner cavity of the rapidly dissolving capsule shell; if the capsule gastric tube dissolves before reaching the stomach, the guide bulb, under the influence of gravity, propels the thin-film gastric tube further into the stomach; Step S3: pulling the traction line to pull the proximal end of the capsule gastric tube out of the body, and observing the color change of the indicator to determine the location of the thin-film gastric tube in the body. Release position; Step S4: After the membrane gastric tube is released into the stomach, cut along the cutting line to form a flat opening; put the nut ring on the outside of the membrane gastric tube on the proximal side, insert the conical opening into the proximal side of the membrane gastric tube, push the nut ring to contact the major axis edge of the ellipse, continue to push the nut ring to squeeze the bottom of the conical opening and transmit force to the elastic rib to deform and bend in the direction deviating from the axial direction. At the same time, the two halves of the conical opening are squeezed open by the nut ring and support the proximal side of the membrane gastric tube until the two halves are fully opened. Then rotate the nut ring into the screw seat. At this time, the membrane gastric tube is connected to the external supply channel.

[0018] The traction capsule gastric tube and its usage method provided by this invention innovatively combine the thin film gastric tube with the quick-dissolving capsule shell and the guide ball head, which can achieve rapid dissolution on the one hand, and help the thin film gastric tube to travel to the target stomach on the other hand. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 These are perspective views and partial enlarged views of the traction capsule gastric tube in an embodiment of the present invention.

[0021] Figure 2 These are perspective views and partial enlarged views of the dissolved capsule shells in an embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the installation and connection structure in an embodiment of the present invention.

[0023] Figure 4 These are perspective and cross-sectional views of the thin-film gastric tube connected to the external supply channel in an embodiment of the present invention. Detailed Implementation

[0024] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. In this specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the overall inventive concept of the present invention and should not be construed as a limitation thereof.

[0025] Furthermore, in the following detailed description, numerous specific details are set forth for ease of explanation to provide a thorough understanding of the embodiments disclosed herein. However, it will be apparent that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and apparatuses are illustrated to simplify the figures.

[0026] It should be noted that the word "comprising" does not exclude other elements or steps, and the words "a" or "an" do not exclude multiple; the orientations or positional relationships indicated by terms such as "one end," "the other end," "internal," "external," "front," "rear," "far end," and "proximal end" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention. "First" and "second" are used to distinguish the names of different components rather than for ordering or indicating importance or hierarchy. Furthermore, any element reference numerals in the claims should not be construed as limiting the scope of this disclosure.

[0027] In this embodiment of the invention, "far end side" refers to the direction closer to the target operating position, and "proximal end side" refers to the direction closer to the operator.

[0028] Example 1

[0029] like Figures 1 to 4 As shown, in an embodiment of the present invention, a traction capsule gastric tube 100 includes a fast-dissolving capsule shell 110, a thin-film gastric tube 120, a guide ball head 130, a prompter 140, and a traction line 150.

[0030] In this embodiment of the invention, the instant capsule shell 110 is generally capsule-shaped, with an internal cavity that can accommodate the thin-film gastric tube 120, the guide ball head 130, and the indicator 140. A fine hole 111 is provided on the proximal side of the instant capsule shell 110, allowing the traction wire 150 to pass through and extend to the outside of the instant capsule shell 110.

[0031] The instant capsule shell 110 is made of water-soluble, food-grade gelatin, which dissolves in the stomach. In the presence of a gastric solution (gastric juice) and water, the gelatin material relies on gastric acid proteases (such as pepsin) to break down the gelatin peptide chains. Upon contact with water, it absorbs water and swells, causing the intermolecular hydrogen bonds to break, thereby achieving dissolution. In some preferred embodiments, the main component of the instant capsule shell 110 is a hydrolyzed product of animal collagen (such as bovine bone gelatin or porcine skin gelatin), containing hydrophilic amino acids (such as glycine and proline), and exhibiting a rigid network structure when dry. In some preferred embodiments, the dimensional parameters of the instant capsule shell range from a length not exceeding 28 mm, a diameter not exceeding 13 mm, a wall thickness not exceeding 0.12 mm, and a dissolution time ranging from 30 seconds to 60 seconds.

[0032] In this embodiment of the invention, the thin-film gastric tube 120 has a channel with openings at both ends, through which externally supplied fluid can flow. To meet different clinical applications, the diameter of the thin-film gastric tube 120 is set to no greater than 32F. In the medical field, the diameter of catheters is usually measured in French (F / Fr), a historically significant unit of measurement invented by a French physician; 1F is approximately equal to 0.33 mm.

[0033] The distal end of the thin-film gastric tube 120 is provided with several side holes 122, through which fluid can also flow out, thereby preventing blockage.

[0034] The thin-film gastric tube 120 can be coiled and folded for easy storage within the instant capsule shell 110. For example, the tube length is set to be no less than 50 cm, thus possessing compressibility and resilience, making it easy to fold into a bundle. In some preferred embodiments, the thin-film gastric tube 120 is folded as follows: the two ends of the thin-film gastric tube 120 are placed in opposite directions; the tube body on the proximal side and the tube body on the distal side of the thin-film gastric tube 120 are folded symmetrically in parallel and placed in the center to form a central bundle; the tube body between the proximal and distal sides of the thin-film gastric tube 120 is spirally coiled around the central bundle to form a bundle. After folding, the proximal side of the thin-film gastric tube 120 connected to the traction wire 150 is placed towards the proximal side of the instant capsule shell 110, and the distal side of the thin-film gastric tube 120 connected to the guide ball head 130 is placed towards the distal side of the instant capsule shell 110. In some preferred embodiments, the thin-film gastric tube 120 is made of polyurethane or silicone material, which has good compressibility and resilience, and is corrosion resistant and suitable for long-term tube placement.

[0035] A cutting line 121 is provided on the proximal side of the thin-film gastric tube 120, allowing the operator to cut the heat-sealed tube section along the cutting line 121 to form a smooth opening. In some preferred embodiments, the cutting line 121 may be a dotted line, making it easier for the operator to tear open the thin-film gastric tube 120 to form a smooth opening.

[0036] In this embodiment of the invention, the guide ball head 130 can completely wrap around the distal end of the thin-film gastric tube 110 and keep it in an open state, that is, keep the distal end open until it dissolves. The guide ball head 130 is made of a water-soluble hard candy ball, which can dissolve in the stomach. The hard candy ball can also increase the dissolution rate with increasing temperature. The function of the guide ball head 130 is to guide the thin-film gastric tube 120 to the target stomach in the body using its own weight. Therefore, its dissolution time is longer than that of the instant-dissolving capsule shell 110, that is, the guide ball head 130 should dissolve later than the instant-dissolving capsule shell 110. If the capsule gastric tube 110 dissolves before reaching the stomach, the guide ball head 130 continues to drive the thin-film gastric tube 110 to continue to advance into the stomach under the action of gravity. In some preferred embodiments, the size of the guide ball head is no more than 10 mm, and its dissolution time in the stomach is 15-30 minutes.

[0037] In this embodiment of the invention, the indicator 140 is located on the proximal side of the thin-film gastric tube 110, primarily using color changes produced by an acid-base reaction to indicate the operator's position of the thin-film gastric tube 110. In some preferred embodiments, the indicator 140 consists of two symmetrically arranged hinges 141 and 142, at least one of which has an acid-base reaction zone 143 that can change color. The two hinges 141 and 142 can clamp the distal side of the traction wire 150 and fix it to the thin-film gastric tube 110 by heat welding.

[0038] In some preferred embodiments, the indicator 140 is yellow when not in contact with acidic substances, and the hydrogen ions in the gastric solution cause the acidic indicator in the acid-base reaction zone 143 to appear red or reddish; the acidic indicator is an acidic indicator containing methyl red.

[0039] In this embodiment of the invention, the distal end of the traction line 150 is heat-bonded to the film gastric tube 110 above the cutting line 121, and the traction line 150 can be separated from the film gastric tube 110 through the cutting line 121. After separation, the film gastric tube 110 can form a flat opening to communicate with an external supply channel. The traction line 150 is evenly provided with scale markings 151, for example, scale markings 151 can be set every 5 cm on the line. The operator can estimate the approximate travel depth of the entire capsule gastric tube in the upper digestive tract by observing and counting the scale markings 151 that enter the human body through the traction line 150. To facilitate the operator's grip, a loop 152 for placing the operator's fingers is also provided on the proximal end of the traction line 150. The traction line 150 can pass through the fine holes 111 of the instant capsule shell 110, thereby extending to the outside of the instant capsule shell 110. In some preferred embodiments, the traction line 150 is made of polyester fiber material, which has good abrasion resistance and elongation resistance. The length of the traction line 150 is not less than 100 cm.

[0040] In some preferred embodiments, the traction capsule gastric tube 100 further includes a mounting connection structure 160, which includes a threaded seat 161, a tapered opening 162, and a nut ring 163. The threaded seat 161 communicates with an external supply pipe and has an external thread. The tapered opening 162 is a cone with an elliptical bottom, and is divided into two symmetrical halves from the edge of the minor axis of the ellipse to the apex. Each half is connected to the edge of the port of the threaded seat 161 by an elastic rib. The tapered opening 162 can pass through the interior of the membrane gastric tube 110. The nut ring 163 has an internal thread and can be screwed onto the threaded seat 161. The nut ring 163 can be fitted onto the outside of the membrane gastric tube 110 and pushed forward to contact the major axis edge of the ellipse. Further pushing of the nut ring 163 compresses the bottom of the conical opening 162 and transmits force to the elastic rib, causing it to deform and bend in a direction deviating from the axial direction. Simultaneously, the two halves of the conical opening 162 are squeezed open by the nut ring 163 and support the proximal side of the membrane gastric tube 110. After the two halves are fully open, the nut ring 163 rotates and fits into the screw seat 161. By installing the connecting structure 160, the proximal side of the membrane gastric tube 110 can be opened, and the opened membrane gastric tube 110 can be connected to the external supply channel to achieve fluid supply. It should be noted that "minor axis" and "major axis" are definitions of two mutually perpendicular directions of the ellipse. The distance between two points in one direction is shorter, hence the name "minor axis," and the distance between two points in the other direction is longer, hence the name "major axis."

[0041] Example 2

[0042] The following describes the method of using the traction capsule gastric tube 110 according to an embodiment of the present invention. The method provided by this embodiment of the present invention enables effective placement of the gastric tube.

[0043] Step S1: The capsule gastric tube 100 is swallowed orally via the proximal end of the externally placed traction line. The thin-film gastric tube 120 is folded using the bundling method described in Example 1 and secured or housed within the capsule shell 110. The guide ball 130 is positioned distally within the capsule shell 110 to increase the weight of the capsule and adjust the center of gravity towards the distal end of the capsule gastric tube 100. In this step, the operator estimates the approximate depth of the capsule gastric tube 100 in the upper digestive tract using the graduations 151 on the traction line 150.

[0044] Step S2: The instant-dissolving capsule shell 110 of the capsule gastric tube dissolves in the stomach, releasing the thin-film gastric tube 120, guide bulb 130, and indicator 140 contained within the inner cavity of the instant-dissolving capsule shell 110. If the capsule gastric tube 120 dissolves before reaching the stomach, the guide bulb 130, under the influence of gravity, propels the thin-film gastric tube 120 further into the stomach.

[0045] Step S3: Pull the traction line 150 to pull the proximal end of the nasogastric tube 120 out of the body, and observe the color change of the indicator 140 to determine the release position of the nasogastric tube 120 in the body. The guide ball head 130 acts as an anchor at the pyloric valve of the stomach to prevent the distal end of the nasogastric tube 120 from slipping out of the stomach, thus placing the nasogastric tube 120 straight in the upper digestive tract. The indicator 140 is heat-welded onto the proximal end of the nasogastric tube 120. The acidic indicator of the indicator 140 undergoes a structural change upon contact with hydrogen ions in the gastric juice. After being pulled back out of the mouth by the traction line 150, the indicator 140 is exposed to visible light and absorbs specific wavelengths of light, displaying different colors. The operator can visually observe the color change to determine the release position of the nasogastric tube 120 in the body. The indicator 140 is yellow when not in contact with acidic substances. Hydrogen ions in gastric juice will cause the methyl red indicator to turn red or reddish. If the indicator 140 turns red or reddish, the thin-film gastric tube 120 has reached the stomach; if the indicator 140 does not turn red or reddish, the thin-film gastric tube 120 has not reached the stomach. Saliva is nearly neutral, with a pH range of 6.6–7.1. Gastric juice is acidic, with a pH range of 0.9–1.5.

[0046] Step S4: Connect the proximal side of the membrane gastric tube 120 to the external supply channel to achieve fluid supply. After the membrane gastric tube 120 is released into the stomach, it is cut along the cutting line 121 to form a flat opening. The nut ring 163 is fitted onto the outside of the membrane gastric tube 120 on the proximal side. The conical opening 162 is inserted into the proximal side of the membrane gastric tube 120. The nut ring 163 is pushed forward to contact the major axis edge of the ellipse. The nut ring 163 is further pushed forward to compress the bottom of the conical opening and transmit force to the elastic rib, causing it to deform and bend in a direction deviating from the axial direction. At the same time, the two halves of the conical opening 162 are squeezed open by the nut ring 163 and support the proximal side of the membrane gastric tube 120 until the two halves are fully open. Then, the nut ring 163 is rotated and fitted into the screw seat 164. At this point, the membrane gastric tube 120 is connected to the external supply channel. The distal end of the thin-film gastric tube 120 has several side holes 121 that are covered by a guide ball head 130. The guide ball head 130 supports the tube body, maintaining its tubular shape and keeping the distal opening open for direct fluid supply and output. After the guide ball head 130 dissolves, the side holes 121 on the distal end of the thin-film gastric tube 120 are exposed, allowing for fluid supply and output while preventing blockage.

[0047] Specifically, the operator hooks the distal loop of the traction line 150 with their finger and uses it as a fixed point for traction, positioning it at the level of the patient's mouth. The patient swallows the traction capsule gastric tube 100 by oral administration of water. Under the action of gravity and gastrointestinal peristalsis, the traction capsule gastric tube 100 is pulled into the stomach. The operator controls the release speed of the traction line 150 with the swallowing action, observing and counting the scale marks 151 of the traction line 150 entering the patient's mouth until the traction line 150 stops entering the patient's mouth. The operator estimates the depth of the traction capsule gastric tube 100 in the digestive tract by counting the scale marks 151. If the estimated depth differs significantly from the conventional anatomical length, it may be that the tube has not reached the stomach. In this case, the operator instructs the patient to continue swallowing water orally, and the traction capsule gastric tube 100 continues to advance into the stomach under the action of water and gastrointestinal peristalsis. After the dissolving time of the instant capsule shell 110 is consumed, the membrane gastric tube 120 will become elastic and lubricated by the liquid, and the membrane gastric tube 120 bundle will unwind and release in the stomach. The operator pulls the traction line 150 and slowly retracts the proximal end of the thin-film gastric tube 120, along with the indicator 140 located on the proximal side of the thin-film gastric tube 120, out of the oral cavity. The indicator 140 undergoes structural changes upon contact with gastric fluid, displaying different colors when exposed to visible light. The operator can visually observe these color changes to determine the release position of the thin-film gastric tube. Following the cutting line 121 on the lower part of the tube after the indicator 140 is welded together, the operator cuts off the welded section of the tube to create a smooth opening.

[0048] The traction capsule gastric tube and its usage method provided in this invention are simple to operate, can quickly establish a channel, and protect structures such as the cardia and epiglottis, as well as surgical wounds in the digestive tract. Single-use swallowing reduces throat irritation during insertion, achieving the goal of quickly establishing a connection between the patient's stomach cavity and the external environment. For prolonged use, the thin-film gastric tube occupies minimal space, effectively alleviating foreign body sensation and improving patient comfort. The traction capsule gastric tube can also be extended to the delivery of large doses of nutrients and medications with unpleasant tastes in a short time, thereby avoiding taste irritation and reducing swallowing difficulty, improving the patient's eating experience.

Claims

1. A traction capsule gastric tube, characterized in that... include: The capsule shell is made of water-soluble, food-grade gelatin that dissolves in the stomach. The proximal side of the shell of the instant capsule is provided with fine holes; A thin-film gastric tube, which forms a channel with openings at both ends; the distal end of the thin-film gastric tube is provided with several side holes offset from each other, and the proximal end of the thin-film gastric tube is provided with a cutting line; the thin-film gastric tube can be coiled and folded. A guide ball head that wraps around the distal end of the thin-film gastric tube and keeps the distal end open; the guide ball head is made of a water-soluble hard candy ball that can dissolve in the stomach, and the dissolution time of the guide ball head is longer than that of the instant-dissolving capsule shell; A prompter is located on the proximal side of the thin-film gastric tube, and uses a color change produced by an acid-base reaction to indicate the position of the thin-film gastric tube. The traction wire has its distal end fixed to the film gastric tube above the cutting line. The traction wire can be separated from the film gastric tube through the cutting line. The traction wire has evenly distributed scale markings. The proximal end of the traction wire has a loop for placing the operator's fingers. The traction wire can pass through the fine holes in the instant capsule shell. The inner cavity of the instant capsule shell can accommodate the folded thin-film gastric tube, the guide ball head, and the indicator.

2. The traction capsule gastric tube according to claim 1, characterized in that, The folding method of the thin-film gastric tube is as follows: the two ends of the thin-film gastric tube are placed in opposite directions, the tube body on the proximal side and the tube body on the distal side of the thin-film gastric tube are folded symmetrically in a parallel manner and placed in the center to form a central bundle; the tube body on the proximal side and the distal side of the thin-film gastric tube is spirally coiled around the central bundle to form a bundle.

3. The traction capsule gastric tube according to claim 2, characterized in that, After the thin-film gastric tube is folded, the proximal end of the thin-film gastric tube connected to the traction line is placed towards the proximal end of the instant capsule shell, and the distal end of the thin-film gastric tube connected to the guide ball head is placed towards the distal end of the instant capsule shell.

4. The traction capsule gastric tube according to any one of claims 1-3, characterized in that, The thin-film gastric tube is made of polyurethane or silicone material.

5. The traction capsule gastric tube according to any one of claims 1-4, characterized in that, The indicator consists of two symmetrically arranged hinges, at least one of which has an acid-base reaction zone that can change color. The two hinges clamp the distal end of the traction wire and are heat-bonded and fixed to the thin-film gastric tube.

6. The traction capsule gastric tube according to claim 5, characterized in that, The indicator is yellow when it is not in contact with acidic substances. The hydrogen ions in the gastric solution will cause the acidic indicator in the acid-base reaction zone to turn red or reddish. The acidic indicator is an acidic indicator containing methyl red.

7. The traction capsule gastric tube according to claim 6, characterized in that, The traction line is made of polyester fiber material, and the traction line is marked with scale marks every 5 centimeters.

8. The traction capsule gastric tube according to any one of claims 1-7, characterized in that, The size of the guide ball head is no greater than 10 mm, and its dissolution time in the stomach is 15-30 minutes; the length of the quick-dissolving capsule shell is no more than 28 mm, the diameter is no more than 33 mm, the wall thickness is no more than 0.12 mm, and its dissolution time in the stomach is 30-60 seconds.

9. The traction capsule gastric tube according to any one of claims 1-8, characterized in that... It also includes an installation connection structure, which includes a threaded seat, a tapered opening, and a nut ring. The threaded seat is connected to an external supply pipe. The tapered opening is a cone shape with an elliptical bottom, and is divided into two symmetrical halves from the minor axis edge of the ellipse to the apex. Each half is connected to the port edge of the threaded seat by an elastic rib. The tapered opening can pass through the interior of the thin-film gastric tube. The nut ring can be sleeved on the outside of the thin-film gastric tube and pushed in to contact the major axis edge of the ellipse. As the nut ring is pushed in, it squeezes the bottom of the tapered opening and transmits force until the elastic rib deforms and bends in a direction away from the axial direction. At the same time, the two halves of the tapered opening are squeezed open by the nut ring and support the proximal side of the thin-film gastric tube until the two halves are fully opened. Then the nut ring rotates and sleeves onto the threaded seat.

10. A method of using a traction capsule gastric tube, characterized in that... Using the traction capsule gastric tube of claim 9, wherein: Step S1: Leave the proximal end of the traction wire outside the body and swallow the capsule gastric tube orally; Step S2: The instant-dissolving capsule shell of the capsule gastric tube dissolves in the stomach, releasing the thin-film gastric tube, the guide ball head, and the indicator housed within the inner cavity of the instant-dissolving capsule shell; if the capsule gastric tube dissolves before reaching the stomach, the guide ball head, under the influence of gravity, drives the thin-film gastric tube to continue advancing into the stomach; Step S3: Pull the traction line to pull the proximal end of the capsule gastric tube out of the body, and observe the color change of the indicator to determine the release position of the thin film gastric tube in the human body; Step S4: After the thin-film gastric tube is released into the stomach, it is cut along the cutting line to form a flat opening; the nut ring is placed on the outside of the thin-film gastric tube on the proximal side, the conical opening is inserted into the proximal side of the thin-film gastric tube, the nut ring is pushed forward to contact the major axis edge of the ellipse, the nut ring is continued to push forward to squeeze the bottom of the conical opening and transmit force to the elastic rib to deform and bend in the direction deviating from the axial direction, at the same time the two halves of the conical opening are squeezed open by the nut ring and support the proximal side of the thin-film gastric tube until the two halves are fully opened, the nut ring is rotated and put into the screw seat, at this time the thin-film gastric tube is connected to the external supply pipe.

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