Oral stomach tube

Abstract

The utility model provides an oral stomach tube, and relates to the field of stomach tubes. The oral stomach tube comprises an inner tube, an outer tube, a first connector, a second connector and a positioning balloon. The inner pipe penetrates into the outer pipe, the inner pipe and the outer pipe are matched to define a fluid inlet and outlet channel, one end of the outer pipe is closed, and the other end of the outer pipe is open. The first connector is installed on the inner pipe and communicated with a pipe cavity of the inner pipe, and the second connector is installed on the outer pipe and communicated with the fluid inlet and outlet channel. The positioning balloon is simultaneously connected with the inner tube and the outer tube and is communicated with the fluid inlet and outlet channel through the opening. When the oral stomach tube is used, the treatment cost can be reduced, the treatment effect is improved, the oral stomach tube is stably and reliably combined with the esophagus, and therefore the use safety is improved.

Description

Technical Field

[0001] The utility model relates to the field of gastric tubes, in particular to an oral gastric tube. Background Art

[0002] Gastric tubes are used in special circumstances to help patients who are unable to swallow deliver essential fluids and food. Gastric tubes are typically made of polyurethane or silicone and come in various sizes and configurations. They can be categorized as oral or nasogastric tubes. During clinical treatment, scarring at the anastomotic site often occurs after esophageal surgery, leading to esophageal strictures and preventing the patient from eating. Currently, the following interventional treatments are commonly used: 1. Esophageal balloons. This technique treats esophageal strictures by inserting a balloon into the patient's esophageal stricture and inflating it. However, this technique is only a one-time treatment; recurrence of strictures requires further dilation, which is labor-intensive and costly, and does not prevent scarring. 2. Esophageal stents. This technique treats esophageal strictures by inserting a stent into the stricture, offering long-term treatment and prolonging remission. However, these stents can be associated with the risk of reflux esophagitis, stent migration and dislodgement, and difficulty managing strictures caused by stent compression. Furthermore, these stents do not prevent scarring.

[0003] The inventors have found that the existing measures for patients with anastomotic scar stenosis after esophageal surgery have at least the following shortcomings:

[0004] If a balloon dilatation catheter is used for treatment, dilatation is performed regularly (with intervals ranging from one month to several months). Especially for children, general anesthesia is required for each dilatation, which increases the burden on the patient. Although esophageal stent treatment can avoid multiple dilatation treatments, it is easy to shift and fall off, and cannot withstand the pressure caused by esophageal restenosis or inhibit scar formation. Especially for children, stent implantation requires caution, and it is difficult to remove after surgery. Utility Model Content

[0005] The purpose of the utility model is to provide an oral gastric tube, which can reduce treatment costs, improve efficacy, and also improve stability, thereby improving safety in use.

[0006] The embodiment of the present utility model is achieved as follows:

[0007] In a first aspect, the present invention provides an orogastric tube, comprising:

[0008] An inner tube, an outer tube, a first connector, a second connector and a positioning balloon, wherein the inner tube is inserted into the outer tube, and the inner tube and the outer tube cooperate to define a fluid inlet and outlet channel, one end of the outer tube is closed, and the other end is set to be open; the first connector is installed on the inner tube and communicated with the lumen of the inner tube, the second connector is installed on the outer tube and communicated with the fluid inlet and outlet channel; the positioning balloon is connected to the inner tube and the outer tube at the same time, and the positioning balloon is connected to the fluid inlet and outlet channel through the opening.

[0009] In an optional embodiment, the positioning balloon includes a middle balloon and two side balloons, wherein the middle balloon is located between the two side balloons and is connected to the two side balloons at the same time; when the positioning balloon is inflated, the cross-sectional area of ​​the middle balloon is smaller than the cross-sectional area of ​​the side balloons.

[0010] Based on the above scheme, the positioning capsule is set to a structure with a small middle and large ends, similar to a dumbbell-shaped structure. When in contact with the tissue wall, the two can form a mutually interlocking structure to improve the firmness of the combination. The position of the positioning capsule is not easy to move, thereby ensuring that the position of the entire oral gastric tube is more stable, not easy to fall off, and safe and reliable to use.

[0011] In an optional embodiment, the inner diameter of the cross section of the intermediate capsule is set to D1, 6mm≤D1≤11mm.

[0012] Based on the above solution, the size of the intermediate capsule is reasonably designed, which not only meets the positioning requirements but also saves manufacturing materials and reduces manufacturing costs.

[0013] In an optional embodiment, the inner diameter of the cross section of the side capsule is set to D2, 8mm≤D2≤15mm.

[0014] Based on the above solution, the size of the side capsule is reasonably designed, which is 2-4 mm larger than the inner diameter of the middle capsule, and can form a stable positioning structure in combination with the middle capsule.

[0015] In an optional embodiment, the outer surface of the positioning balloon is provided with a drug coating for inhibiting scar formation.

[0016] Based on the above scheme, by providing a drug coating, the formation of scars can be effectively inhibited, thereby effectively preventing the progression of anastomotic scars after esophageal stricture dilatation surgery and improving the treatment effect.

[0017] In an optional embodiment, the drug coating is configured as a botulinum toxin drug coating.

[0018] Based on the above scheme, the botulinum toxin drug coating has a good effect in inhibiting scar formation and can effectively improve the treatment effect.

[0019] In an optional embodiment, a marking portion is provided on the surface of the outer tube or the inner tube.

[0020] Based on the above scheme, when the oral gastric tube is placed from the patient's mouth into the patient's esophagus, the insertion depth of the oral gastric tube can be clearly known by observing the marking part on the inner tube or the outer tube in real time, thereby judging the position of the positioning balloon relative to the esophagus. The position control of the positioning balloon is more accurate, which is conducive to positioning.

[0021] In an optional embodiment, the positioning balloon includes a balloon cavity and a first fixing hole and a second fixing hole communicating with the balloon cavity, and the opening of the outer tube is sealedly connected to the first fixing hole; the inner tube is passed through the balloon cavity and extends from the second fixing hole, and the tube wall of the inner tube is sealedly connected to the second fixing hole.

[0022] Based on the above solution, the positioning balloon and the inner tube cooperate to form a relatively closed space, saving materials and reducing manufacturing costs.

[0023] In an optional embodiment, the oral gastric tube further comprises a first sealing plug and a second sealing plug, wherein the first sealing plug is connected to the first connector for closing or opening the first connector; the second sealing plug is connected to the second connector for closing or opening the second connector.

[0024] Based on the above solution, when the oral gastric tube is not in use, the first connector can be closed with the first seal, and the second connector can be closed with the second seal to avoid contamination.

[0025] In an optional embodiment, one end of the inner tube passes through the closed end of the outer tube, and the first connector is installed on the pipe section of the inner tube that passes through the closed end of the outer tube; the second connector is arranged on the tube wall of the outer tube and is spaced apart from the closed end.

[0026] Based on the above solution, the first connector is located at the end of the inner tube, making it easy to introduce a guidewire or inject nutrients into the esophagus using a syringe. The second connector is located on the side of the outer tube, and the first and second connectors do not interfere with each other, making operation convenient.

[0027] The beneficial effects of the embodiments of the present utility model are:

[0028] In summary, the oral gastric tube provided in this embodiment is provided with a contrast agent injected from the second connector before the tube is inserted. When the tube is inserted, a guide wire is passed through the inner tube to assist in the insertion of the tube into the esophagus. The operator can always observe the marking portion provided on the inner tube or outer tube to ensure that the positioning balloon is in the area prone to postoperative stenosis, thereby improving the accuracy of the positioning balloon position. After the tube is inserted, the guide wire is pulled out from the inner tube, a three-way connection is connected at the second connector, and a fluid such as gas or liquid is input through this port to expand and fix the positioning balloon. A syringe is connected at the first connector and a nutrient solution is injected into the patient's stomach through the inner tube. In this way, by cooperating with the inner tube, the outer tube and the positioning balloon, the expanded positioning balloon can be used to contact the tissue wall of the esophagus to complete the positioning, thereby achieving the positioning of the inner tube and the outer tube relative to the esophagus. During use, the relative position of the oral gastric tube and the esophagus is stable and not easy to loosen, making it convenient and reliable to use. Moreover, after the positioning balloon is expanded, it can expand the corresponding position of the esophagus to prevent cicatricial stenosis.

[0029] In addition, the outer surface of the positioning balloon is coated with a botulinum toxin drug coating with botulinum toxin type A as the main ingredient, which can effectively inhibit the formation of scars.

[0030] In addition, the positioning balloon is set to a dumbbell-shaped structure with a small middle and large ends, which has a large contact area with the esophageal wall, is firmly combined, and is not easy to loosen. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 Schematic diagram of an orogastric tube according to an embodiment of the present invention.

[0033] icon:

[0034] 001-fluid inlet and outlet channel; 002-identification part; 100-inner tube; 200-outer tube; 300-first connector; 400-second connector; 500-positioning balloon; 510-middle balloon body; 520-side balloon body; 521-first fixing hole; 522-second fixing hole; 600-botulinum toxin drug coating. DETAILED DESCRIPTION

[0035] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0038] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0040] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0041] In the existing technology, when a patient has "esophageal postoperative anastomotic scar stenosis", if a balloon dilatation catheter is used for treatment, since the esophageal balloon is a one-time treatment, multiple dilatation operations need to be performed regularly. Especially for children, general anesthesia is required for each dilatation operation, which increases the burden on the patient. If an esophageal stent is used for treatment, although multiple dilatation treatments can be avoided, it is easy to shift and fall off, and it cannot withstand the pressure caused by esophageal restenosis and cannot inhibit scar formation. Especially for children, stent implantation must be cautious and it is difficult to remove after surgery.

[0042] In view of this, the designer provides an oral gastric tube, which can not only reduce the difficulty of operation and improve the treatment effect, but also reduce the burden on patients.

[0043] Please combine Figure 1 In this embodiment, the oral gastric tube includes an inner tube 100, an outer tube 200, a first connector 300, a second connector 400, and a positioning balloon 500. The inner tube 100 is inserted into the outer tube 200, and the inner tube 100 and the outer tube 200 cooperate to define a fluid inlet and outlet channel 001. One end of the outer tube 200 is closed, and the other end is open. The first connector 300 is mounted on the inner tube 100 and communicates with the lumen of the inner tube 100. The second connector 400 is mounted on the outer tube 200 and communicates with the fluid inlet and outlet channel 001. The positioning balloon 500 is connected to both the inner tube 100 and the outer tube 200, and the positioning balloon 500 is connected to the fluid inlet and outlet channel 001 through the open port.

[0044] Based on the above, the oral gastric tube provided in this embodiment is used as follows:

[0045] Before the tube is inserted, a contrast agent is injected through the second connector 400. During insertion, a guidewire is passed through the inner tube 100 to assist in esophageal tube insertion. The operator can constantly observe the markings 002 on the inner tube 100 or outer tube 200 to ensure that the positioning balloon 500 is located in an area prone to postoperative stenosis, thereby improving the accuracy of the positioning balloon 500. After the tube is inserted, the guidewire is removed from the inner tube 100. The second connector 400 is connected to a three-way valve, through which fluids such as gas or liquid are introduced to expand and secure the positioning balloon 500. A syringe is connected to the first connector 300, and nutrient solution is injected into the patient's stomach through the inner tube 100. In this way, the inner tube 100, outer tube 200, and positioning balloon 500 cooperate to achieve positioning by contacting the inflated positioning balloon 500 with the tissue wall of the esophagus. This ensures that the inner tube 100 and outer tube 200 are positioned relative to the esophagus. During use, the relative position of the orogastric tube and the esophagus is stable and not easily loosened, making it convenient and reliable to use. Furthermore, the inflated positioning balloon 500 can dilate the corresponding portion of the esophagus, preventing scarring and stricture.

[0046] The following examples illustrate the details of the oral gastric tube provided in this application by way of examples.

[0047] In this embodiment, optionally, both the inner tube 100 and the outer tube 200 can be circular tubes. The inner tube 100 is inserted into the outer tube 200, with the first end of the inner tube 100 passing through the first end of the outer tube 200, the first end of the outer tube 200 being sealed, and the first end of the inner tube 100 being connected to a first connector 300. The second end of the inner tube 100 passes through the second end of the outer tube 200, which is open. The second end of the outer tube 200 is connected to a positioning balloon 500, and the second end of the inner tube 100 is used to deliver nutritional fluids, etc., to the patient's stomach. The second connector 400 is fixed to the wall of the outer tube 200 and is positioned adjacent to the first connector 300, with a certain distance between the two so that they do not interfere with each other during use. The length L1 of the inner tube 100 is substantially the length of the entire orogastric tube. The length of the inner tube 100 can be set within a range of 20 mm ≤ L1 ≤ 60 mm. For example, the length of the inner tube 100 can be set to 20 mm, 40 mm, or 60 mm. The length of the outer tube 200 is set as required.

[0048] Optionally, a marking portion 002 may be provided on the wall of the inner tube 100 or outer tube 200. The marking portion 002 may be a scale line. During the insertion operation, the insertion depth of the inner tube 100 into the esophagus can be determined by observing the marking portion 002, thereby determining the position of the positioning balloon 500 connected to the inner tube 100 relative to the esophagus, thereby facilitating the precise positioning of the positioning balloon 500 at the narrowed portion of the esophagus. To facilitate observation of the marking portion 002, a developing layer may be applied to the location of the marking portion 002.

[0049] In this embodiment, the positioning balloon 500 optionally includes a central balloon 510 and two side balloons 520. The central balloon 510 is located between the two side balloons 520 and is connected to both side balloons 520. When the positioning balloon 500 is inflated, the cross-sectional area of ​​the central balloon 510 is smaller than the cross-sectional area of ​​the side balloons 520. It should be noted that the positioning balloon 500 has a certain degree of elasticity and can expand when filled with gas or liquid, thereby dilating the esophageal stricture. In addition, to ensure the structural sealing of the positioning balloon 500, the central balloon 510 and the two side balloons 520 can be manufactured using an integrated molding method.

[0050] Specifically, the positioning sac is formed by the cooperation of the middle sac 510 and the two side sacs 520 to define an internal chamber. A hole is provided in the middle of each side sac 520. For ease of description, the hole in one side sac 520 is referred to as the first fixing hole 521, and the hole in the other side sac 520 is referred to as the second fixing hole 522. The inner tube 100 passes through both the first fixing hole 521 and the second fixing hole 522. The open end of the outer tube 200 is sealed to the fixing hole. In this way, the annular fluid inlet and outlet channel 001 defined by the outer tube 200 and the inner tube 100 communicates with the internal chamber through the first fixing hole 521. Furthermore, the second fixing hole 522 is sealed to the wall of the outer tube 200 of the inner tube 100, and the second fixing hole 522 is sealed by the inner tube 100, thereby reducing the manufacturing cost of the positioning sac.

[0051] It should be understood that the positioning capsule is set to a structure that is small in the middle and large at both ends, similar to a dumbbell-shaped structure. When it contacts the tissue wall, the two can form a mutually interlocking structure, thereby improving the firmness of the combination. The position of the positioning capsule is not easy to move, thereby ensuring that the position of the entire oral gastric tube is more stable, not easy to fall off, and safe and reliable to use.

[0052] In an optional embodiment, the inner diameter of the cross section of the middle capsule 510 is set to D1, 6mm≤D1≤11mm. The inner diameter of the cross section of the side capsule 520 is set to D2, 8mm≤D2≤15mm. The dimensions of the middle capsule 510 and the side capsules 520 are rationally designed, with the side capsules 520 having an inner diameter 2-4mm larger than that of the middle capsule 510. This allows the positioning capsules to achieve better positioning while reducing consumables and costs.

[0053] In other embodiments, the outer surface of the positioning balloon 500 may optionally be provided with a drug coating for inhibiting scar formation. The drug coating may be a botulinum toxin drug coating 600. The botulinum toxin drug coating 600 is effective in inhibiting scar formation and can effectively improve the treatment effect.

[0054] In this embodiment, the orogastric tube optionally further includes a first sealing plug and a second sealing plug. The first sealing plug is connected to the first connector 300 and is used to close or open the first connector 300. The second sealing plug is connected to the second connector 400 and is used to close or open the second connector 400. When the orogastric tube is not being used for nutrient delivery, the first sealing plug can be used to close the first connector 300, and the second sealing plug can be used to close the second connector 400 to prevent contamination of the orogastric tube.

[0055] It should be understood that both the first sealing plug and the second sealing plug can be pagoda-shaped elastic plugs, which can be connected to the first connector 300 and the second connector 400 respectively by pull wires, which is convenient to use.

[0056] The oral gastric tube provided in this embodiment utilizes a dumbbell-shaped positioning balloon 500 to bond with the esophageal tissue wall, providing high stability, resistance to loosening, and safe and reliable use. The inner tube 100 and syringe can be used together to smoothly deliver nutrients to the patient's stomach, making operation easy.

[0057] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An orogastric tube, characterized in that: include: An inner tube (100), an outer tube (200), a first connector (300), a second connector (400) and a positioning balloon (500), wherein the inner tube (100) is inserted into the outer tube (200), and the inner tube (100) and the outer tube (200) cooperate to define a fluid inlet and outlet channel (001), and one end of the outer tube (200) is closed, and the other end is set to be open; the first connector (300) is installed on the inner tube (100) and communicated with the lumen of the inner tube (100), and the second connector (400) is installed on the outer tube (200) and communicated with the fluid inlet and outlet channel (001); the positioning balloon (500) is connected to the inner tube (100) and the outer tube (200) at the same time, and the positioning balloon (500) is connected to the fluid inlet and outlet channel (001) through the open port.

2. The orogastric tube according to claim 1, wherein: The positioning balloon (500) includes a middle balloon (510) and two side balloons (520), wherein the middle balloon (510) is located between the two side balloons (520) and is connected to the two side balloons (520). When the positioning balloon (500) is inflated, the cross-sectional area of ​​the middle balloon (510) is smaller than the cross-sectional area of ​​the side balloons (520).

3. The orogastric tube according to claim 2, wherein: The inner diameter of the cross section of the intermediate capsule (510) is set to D1, 6mm≤D1≤11mm.

4. The orogastric tube according to claim 2, wherein: The inner diameter of the cross section of the side capsule (520) is set to D2, 8mm≤D2≤15mm.

5. The orogastric tube according to claim 1, wherein: The outer surface of the positioning balloon (500) is provided with a drug coating for inhibiting scar formation.

6. The orogastric tube according to claim 5, characterized in that: The drug coating is configured as a botulinum toxin drug coating (600).

7. The orogastric tube according to claim 1, characterized in that: A marking portion (002) is provided on the surface of the outer tube (200) or the inner tube (100).

8. The orogastric tube according to claim 1, wherein: The positioning balloon (500) includes a balloon cavity and a first fixing hole (521) and a second fixing hole (522) communicating with the balloon cavity. The opening of the outer tube (200) is sealedly connected to the first fixing hole (521). The inner tube (100) is inserted into the balloon cavity and extends from the second fixing hole (522). The tube wall of the inner tube (100) is sealedly connected to the second fixing hole (522).

9. The orogastric tube according to claim 1, wherein: The oral gastric tube further includes a first sealing plug and a second sealing plug, wherein the first sealing plug is connected to the first connector (300) and is used to close or open the first connector (300); the second sealing plug is connected to the second connector (400) and is used to close or open the second connector (400).

10. The orogastric tube according to claim 1, characterized in that: One end of the inner tube (100) passes through the closed end of the outer tube (200); the first connector (300) is installed on the tube section of the inner tube (100) that passes through the closed end of the outer tube (200); and the second connector (400) is arranged on the tube wall of the outer tube (200) and is spaced apart from the closed end.

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