A gastric tube for treating esophageal tumors

Abstract

The utility model belongs to the technical field of medical devices, and specifically relates to a gastric tube for treating esophageal tumors, comprising a gastric tube body, a guide wire and a length-adjustable positioning component, wherein the gastric tube body is provided with a main cavity for eating and at least one sub-cavity for accommodating a radiation source, and the positioning component comprises an upper section with a first length and a lower section with a second length, and when the radiation source is placed in the sub-cavity for positioning, the guide wire sequentially places the lower section, the radiation source and the upper section in the sub-cavity, and the upper section and the lower section cooperate to clamp and fix the radiation source in the sub-cavity, and the scheme flexibly adjusts and fixes the position of the radiation source through multiple pathways, thereby effectively improving the tumor treatment effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical instruments, and in particular relates to a gastric tube for treating esophageal tumors. Background Art

[0002] Esophageal cancer is a malignant tumor that occurs in the esophageal epithelial tissue, accounting for about 2% of all malignant tumors. About 220,000 people die of esophageal cancer every year in the world. my country is a high-incidence area for esophageal cancer, and the number of deaths from esophageal cancer ranks second only to gastric cancer. Most people are over 40 years old, and there are more men than women. However, in recent years, there has been an increasing trend in the number of people under 40 years old. The occurrence of esophageal cancer is related to chronic stimulation by nitrosamines, inflammation and trauma, genetic factors, and the content of trace elements in drinking water, food and vegetables.

[0003] Currently, radiotherapy is widely used to treat esophageal cancer. However, traditional radiotherapy uses radiation from outside the human body to treat tumors in the esophagus. This method indiscriminately irradiates normal human tissues and tumor tissues during radiotherapy, which can cause damage to normal tissues and have great side effects.

[0004] To this end, the utility model with application number CN200620079162.X discloses a double-chamber water bag type esophageal source applicator, in which a gastric tube with both ends extending out of the water bag is arranged inside the water bag, a radiation source tube with both ends connected or integrated with the end of the gastric tube is arranged inside the gastric tube, and a contrast agent tube with one end extending out of the gastric tube and the other end connected to the water bag is arranged.

[0005] The above scheme improves the targeting uniformity of intracavitary treatment and greatly reduces damage to normal tissues by placing the radiation source tube on the gastric tube and then extending it into the esophagus together with the gastric tube for radiotherapy of the tumor. However, this scheme directly places the radiation source tube and the contrast agent tube inside the gastric tube, which will reduce the internal space of the gastric tube and affect the patient's eating. At the same time, this scheme installs the radiation source on a steel wire and then places the radiation source at the tumor site for radiotherapy. Since the gastric tube has a certain degree of softness, it is difficult to ensure the accuracy of the correspondence between the radiation source and the tumor in the case of blind insertion, which will inevitably affect the treatment effect.

[0006] Therefore, there is an urgent need for a radiotherapy device that can be accurately positioned and has better treatment effects. Utility Model Content

[0007] The utility model aims to provide a gastric tube for treating esophageal tumors, so as to partially alleviate or solve the above problems.

[0008] In order to solve the technical problems mentioned above, the utility model specifically adopts the following technical solutions: a gastric tube for treating esophageal tumors, comprising a gastric tube body, a guide wire and a length-adjustable positioning assembly, wherein the gastric tube body is provided with a main cavity for eating and at least one auxiliary cavity for accommodating a radiation source, wherein the positioning assembly comprises an upper section with a first length and a lower section with a second length, and when the radiation source is placed in the auxiliary cavity for positioning, the guide wire sequentially places the lower section, the radiation source and the upper section into the auxiliary cavity, and the upper section and the lower section cooperate to clamp and fix the radiation source in the auxiliary cavity; wherein the upper section with the first length is composed of a plurality of fixing members of different lengths selected in advance according to the position of the tumor and the length of the auxiliary cavity; the lower section with the second length is composed of a plurality of supporting members of different lengths selected in advance according to the position of the tumor; or, the upper section and the lower section are respectively portions of a specified length cut from a rod according to the position of the tumor and the length of the auxiliary cavity.

[0009] As an improvement, the support member includes a plurality of second support members and a first support member in contact with the radiation source, the fixing member includes a plurality of second fixing members and a first fixing member in contact with the radiation source, the first ends of the support member and the second fixing member are respectively provided with protrusions, and the second ends of the second support member and the fixing member are respectively provided with first grooves matching the protrusions.

[0010] As an improvement, the ends of the upper section and the lower section that are in contact with the radiation source are respectively provided with a second groove for accommodating the radiation source.

[0011] As an improvement, the ends of the first supporting member and the first fixing member contacting the radiation source are respectively provided with a second groove for accommodating the radiation source.

[0012] As an improvement, a sleeve for limiting the position of the radiation source is further provided between the upper section and the lower section.

[0013] As an improvement, the cross-sectional shapes of the support member and the fixing member are consistent with the cross-sectional shape of the cavity of the auxiliary cavity, so that the support member and the fixing member can just be placed in the auxiliary cavity.

[0014] As an improvement, the main cavity runs through the stomach tube body and is consistent with the length of the stomach tube body.

[0015] As an improvement, the secondary cavity extends from the first end to the second end of the gastric tube body, and the length of the secondary cavity is smaller than the length of the main cavity.

[0016] As an improvement, a plurality of side holes are opened on the cavity wall of the main cavity, and the side holes are located at the second end of the stomach tube body.

[0017] As an improvement, the at least one sub-lumen includes two sub-lumens, and the two sub-lumens are symmetrical about the central axis of the gastric tube body.

[0018] The principle and beneficial effect of the utility model are as follows: since the specific position of the tumor in the esophagus can be determined in advance, and since the lengths of the gastric tube and the auxiliary cavity are fixed, and the length of the auxiliary cavity is the length covering the esophagus, the specific position of the radiation source in the auxiliary cavity can be accurately calculated according to the position of the tumor in the esophagus, and then the radiation source is clamped and fixed by setting the upper and lower segments that cooperate with each other, and the position of the radiation source is adjusted by selecting upper and lower segments of different lengths (or selecting support members and fixing members of different lengths to obtain upper and lower segments of different lengths respectively); at the same time, by setting the protrusion and the first groove, the upper and lower segments can be connected more tightly, thereby ensuring the longitudinal fixation effect of the radiation source, and the protrusion can provide a positioning space for the guide wire, so that the guide wire can pass the upper and lower segments into the auxiliary cavity; in addition, by setting the second groove and the sleeve, the radiation source can be fixed laterally to prevent the radiation source from shifting inside the auxiliary cavity, thereby affecting the treatment effect.

[0019] In summary, this scheme effectively improves the accuracy of the position of the radiation source and thus improves the tumor treatment effect by positioning the radiation source using upper and lower segments of different lengths that can be arbitrarily combined. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is a three-dimensional diagram of the overall structure of an embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the overall structure of the adjustment mechanism of the first embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of the external structure of the first cavity portion of the adjustment mechanism of the first embodiment of the utility model;

[0024] Figure 4 This is a schematic diagram of the internal structure of the first cavity portion of the adjustment mechanism of the first embodiment of the utility model;

[0025] Figure 5 A cross-sectional view of one end of a stomach tube extending into a human stomach according to an embodiment of the utility model;

[0026] Figure 6 This is a schematic diagram of the internal structure of the second cavity part of the adjustment mechanism of the first embodiment of the utility model;

[0027] Figure 7a and Figure 7b They are respectively a three-dimensional structural diagram and a cross-sectional diagram of the internal structure of the second cavity (including the movable chamber, the second piston and the radiation source) in the first embodiment of the utility model;

[0028] Figure 8 It is a cross-sectional view of the adjustment mechanism in the second embodiment of the present utility model;

[0029] Fig. 9 This is a schematic diagram of the overall internal structure of the gastric tube in Embodiment 3 of the present utility model;

[0030] Fig.10 is a schematic diagram of another exemplary positioning assembly in Embodiment 3 of the present utility model;

[0031] Fig.11 It is an enlarged structural schematic diagram of the second supporting member or the second fixing member in the utility model.

[0032] Markings in the figure: 1. gastric tube body; 2. main cavity; 3. auxiliary cavity; 4. adjustment mechanism; 41. main body; 42. first cavity; 421. first piston; 422. limit block; 423. scale line; 43. second cavity; 431. movable bin; 432. upper piston; 433. lower piston; 5. side hole; 6. adjustment hole; 7. radiation source; 8. connecting line; 9. adjustment handle; 10. upper section; 11. lower section; 12. first support member; 13. second support member; 14. first fixing member; 15. second fixing member; 16. first groove; 17. protrusion; 18. elastic member. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] Herein, the suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present invention, and have no specific meanings. Therefore, "module", "component" or "unit" can be used in a mixed manner.

[0035] In this document, the terms "upper", "lower", "inner", "outer", "front", "rear", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0036] In this document, unless otherwise clearly specified or limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0037] Herein "and / or" includes any and all combinations of one or more of the associated listed items.

[0038] Herein, "plurality" means two or more than two, ie, it includes two, three, four, five, etc.

[0039] Embodiment 1 is basically as shown in the attached Figure 1-7b As shown:

[0040] like Figure 1As shown, the utility model provides a gastric tube for radiotherapy of esophageal tumors, including a gastric tube body 1 and an adjustment mechanism 4. Since the length from the human oral cavity to the stomach is generally 45 cm-55 cm, that is, the length of the gastric tube body 1 extending into the human body is 45 cm-55 cm, the total length of the gastric tube body 1 in the present application is 70 cm-80 cm, and the gastric tube body 1 is provided with a main cavity 2 for eating and at least one sub-cavity 3 for accommodating the adjustment mechanism 4, wherein the main cavity 2 runs through the entire gastric tube body 1 and is connected to the gastric tube body 1. The lengths are consistent, the auxiliary cavity 3 is close to the inner wall of the stomach tube body 1, and the cross-sectional area of ​​the auxiliary cavity 3 is smaller than the cross-sectional area of ​​the main cavity 2. The auxiliary cavity 3 extends from the first end of the stomach tube body 1 (the end located outside the human body when in use) to the second end (the end located inside the human body when in use), and the length of the auxiliary cavity 3 is 50cm-60cm, so that the second end of the stomach tube body 1 has only the main cavity 2 but no auxiliary cavity 3, and the main cavity 2 and the auxiliary cavity 3 do not interfere with each other. At the same time, a plurality of side holes 5 are provided at the second end of the stomach tube body 1 to facilitate liquid food, water, etc. to enter the stomach.

[0041] Exemplarily, the length of the main body 1 of the gastric tube is 75 cm, of which the length of the part that extends into the human body when in use is 50 cm; and the length of the secondary cavity is 55 cm, of which the length of the part that extends into the human body is 35 cm, so that the part of the secondary cavity that extends into the human body just corresponds to the patient's esophagus, and the tumor is generally located in the esophagus. By determining the distance between the tumor and the bottom of the secondary cavity (or the distance between the tumor and the bottom of the esophagus), the depth to which the radiation source should extend into the secondary cavity can be calculated. Therefore, the adjustment mechanism can be placed in one of the secondary cavities in advance, and then the gastric tube can be placed into the user's body under the action of the guide wire (for example, the guide wire is guided through another secondary cavity or the main cavity). However, due to blind insertion and the overall softness of the gastric tube, errors are inevitable. At the same time, the user will move after placement, which will cause the gastric tube to deviate up and down. Therefore, it can be detected by visual equipment such as CT or ultrasound, and then the adjustment mechanism can be used for adjustment.

[0042] In some embodiments, two sub-cavities 3 are provided, and the two sub-cavities 3 are of the same size and are symmetrical about the central axis of the gastric tube body 1 .

[0043] like Figure 2-Figure 6 The regulating mechanism 4 includes a first cavity 42 and a second cavity 43, the first cavity 42 and the second cavity 43 are connected through a pipeline, a first piston is slidably provided inside the first cavity 42, a second piston is slidably provided inside the second cavity 43, and a mobile warehouse is connected to the second piston, and a accommodating cavity for accommodating the radiation source 7 is provided inside the mobile warehouse 431; a closed cavity is formed between the first cavity 42, the pipeline and the second cavity 43, when the first piston slides in the first cavity 42, the fluid flow in the closed cavity drives the second piston to slide in the second cavity 43, and the second piston drives the mobile warehouse 431 to move in the second cavity 43, and the specific fluid includes gas or liquid.

[0044] In some embodiments, the first cavity 42 and the second cavity 43 are cavities with the same cross-sectional area (for example, cylindrical cavities with the same inner diameter), so that the displacement distance of the first piston in the first cavity 42 and the movement distance of the second piston in the second cavity 43 are always the same, thereby more intuitively judging the movement position of the radiation source 7 by the displacement distance of the first piston.

[0045] In some embodiments, the second piston includes an upper piston 432 and a lower piston 433, and the upper piston 432 and the lower piston 433 are respectively fixed at both ends of the mobile warehouse, and the side walls of the upper piston 432 and the lower piston 433 are respectively slidably set in the second cavity 43. The mobile warehouse is fixed by the double piston structure, which can make the mobile warehouse more stable during the up and down movement and prevent it from shifting.

[0046] like Figure 3 , Figure 4 An adjustment hole 6 is provided on the side wall of the first cavity 42, and the adjustment hole 6 is in the shape of a long strip. A limit block 422 is provided at the corresponding part of the first piston 421 and the adjustment hole 6. A part of the limit block 422 extends out of the adjustment hole 6 and is located outside the first cavity 42, so that the position of the first piston 421 in the first cavity 42 can be adjusted conveniently by sliding the limit block 422.

[0047] In some embodiments, the adjustment hole 6 is provided with scale lines 423 along the vertical direction (ie, the moving direction of the limit block 422 ), so that the operator can make the adjustment more intuitive and convenient.

[0048] In some embodiments, Figure 7a and Figure 7b The middle part of the mobile warehouse 431 is a first cylinder coaxially arranged with the second cavity 43, and a holding cavity for holding the radiation source 7 is arranged inside the first cylinder. The two ends of the first cylinder extend to the two ends respectively to form a second cylinder and a third cylinder with successively increasing diameters, and the diameter of the third cylinder is smaller than the diameter of the first cylinder. The second piston includes an upper piston 432 and a lower piston 433 symmetrically arranged at the two ends of the first cylinder, and a first cavity for holding the third cylinder and a second cavity for holding the second cylinder are opened inside the upper piston 432 and the lower piston 433, and the diameter of the second cavity is smaller than the diameter of the third cavity. Such an arrangement is convenient for installation and can effectively prevent the mobile warehouse 431 from falling off from the second piston.

[0049] In some embodiments, the first piston 421 and the second piston are both made of medical materials.

[0050] By setting the first piston 421 and the second piston, a closed cavity is formed between the first cavity 42, the pipe 41 and the second cavity 43. When the first piston 421 slides upward or downward, the fluid in the closed cavity flows (causing the air pressure or hydraulic pressure to change), and the second piston moves under the push of the fluid. The second piston drives the mobile bin 431 to move, thereby changing the position of the radiation source 7 in the sub-cavity 3, thereby achieving fine adjustment of the position of the radiation source 7.

[0051] In some embodiments, the pipeline includes a first pipeline and a second pipeline, and the two ends of the first pipeline and the second pipeline are respectively connected to the first cavity 42 and the second cavity 43 to form an annular closed cavity, and the first piston and the second piston divide the annular closed cavity into a first closed cavity and a second closed cavity.

[0052] In some embodiments, the width of the mobile warehouse 431 is smaller than the width of the second cavity 43 (for example, when the mobile warehouse and the second cavity are both configured to be cylindrical, the diameter of the mobile warehouse is smaller than the diameter of the second cavity), and the mobile warehouse 431 does not contact the inner wall of the second cavity 43, thereby preventing the side wall of the mobile warehouse from rubbing against the inner wall of the second cavity, thereby causing wear on the mobile warehouse 431 and the second cavity 43.

[0053] In some embodiments, an opening is provided on the side wall of the movable chamber 431 to facilitate placement of the radiation source into the accommodating cavity.

[0054] In some embodiments, the fluid in the closed cavity may be air or water.

[0055] During specific use, the specific position of the esophageal tumor in the esophagus is determined in advance by existing technologies such as ultrasound, and then the adjustment mechanism 4 is placed at the corresponding position in the sub-cavity 3 (since the length of the gastric tube body 1 is fixed, once the position of the tumor is known, the specific depth of the radiation source 7 extending into the sub-cavity can be determined). However, since the gastric tube body 1 is blindly inserted and has a certain degree of softness, errors are inevitable. Therefore, fine-tuning is achieved through the adjustment mechanism 4. During fine-tuning, the first piston 421 is driven to move by the sliding limit block 422, and then the fluid in the closed cavity flows, driving the second piston located inside the sub-cavity 3 to move in the second cavity 43, thereby changing the position of the radiation source 7.

[0056] For example, the following experiments are used to compare the effects of using the gastric tube in this scheme:

[0057] Table 1 (Comparison table of the effects of this program and traditional treatment):

[0058]

[0059] Embodiment 2 is as attached Figure 8 Shown:

[0060] The present embodiment is different from the first embodiment in that: in the present embodiment, the adjustment mechanism includes an adjustment handle 9, a connecting line 8, a movable bin 431 and a guide wire, wherein the movable bin in the present embodiment and the movable bin in the first embodiment can adopt the same structure, the guide wire is used to place the movable bin 431 into the sub-cavity, a first cavity is provided in the adjustment handle 9, a first piston is slidably provided in the first cavity, a long strip adjustment hole is provided on one side of the adjustment handle 9, a limit block is provided at the corresponding part of the first piston and the adjustment hole, a part of the limit block extends out of the first cavity and is located at the adjustment On the outside of the handle 9, the limit block can move up and down in the adjustment hole, so that the operator can slide the first piston through the limit block. One end of the connecting line 8 passes through the adjustment handle 9 and is fixed to the bottom of the first piston. The other end of the connecting line 8 is fixed to the mobile warehouse 431. The mobile warehouse 431 is provided with a cavity for accommodating the radiation source. When the operator slides the limit block in the adjustment hole, the limit block drives the first piston to move up and down in the first cavity, the first piston drives the connecting line 8, and then the connecting line 8 drives the mobile warehouse 431 to move up and down synchronously, thereby realizing fine-tuning of the position of the radiation source.

[0061] In some embodiments, scale lines are provided on the outer wall of the adjustment handle 9 , and the scale lines are located on the left or right side of the adjustment hole, so that it is more intuitive when adjusting the position of the first piston.

[0062] In some embodiments, the mobile chamber 431 is fixed to the connecting line 8 by an elastic member 18, and the cross-sectional shape of the elastic member 18 is consistent with the cross-sectional shape of the sub-cavity body to prevent the radiation source from shaking in the sub-cavity and affecting the treatment effect.

[0063] In other embodiments, elastic members may be provided at both ends of the mobile bin 431, one of the elastic members is fixed to the connecting line 8, and the two elastic members may slide in the sub-cavity, so that the position of the mobile bin can be fixed by the elastic members.

[0064] In some embodiments, the mobile chamber 431 includes a plurality of mobile chamber components with cavities of different lengths to accommodate different numbers of radiation sources and to accommodate tumors of different sizes.

[0065] In summary, this solution places the radiation source 7 inside the adjustment mechanism 4 and fine-tunes the position of the radiation source 7 through the pull-wire adjustment mechanism 4, thereby comprehensively providing a gastric tube for radiotherapy of esophageal tumors that can be fine-tuned, has more precise drug positioning, and has better treatment effects.

[0066] Embodiment 3 is as attached Figure 9-11 As shown:

[0067] The difference between this embodiment and embodiments one and two is that: in this embodiment, the stomach tube body with a main cavity and a sub-cavity structure in embodiment one is adopted, and also includes a positioning component and a guide wire, wherein the positioning component includes an upper segment 10 with a first length and a lower segment 11 with a second length. When the radiation source 7 is placed in the sub-cavity for positioning, the guide wire sequentially places the lower segment 11, the radiation source 7 and the upper segment 10 into the sub-cavity from the opening end of the sub-cavity, and the upper segment 10 and the lower segment 11 cooperate to clamp and fix the radiation source 7 in the sub-cavity.

[0068] In some embodiments, the upper section 10 with a first length is composed of a plurality of fixing members of different lengths selected in advance according to the location of the tumor; the lower section 11 with a second length is composed of a plurality of supporting members of different lengths selected in advance according to the location of the tumor, and by selecting supporting members and fixing members of different lengths and combining them to form lower sections 11 and upper sections 10 of different lengths, the position of the radiation source 7 can be adjusted.

[0069] In other embodiments, the upper section 10 and the lower section 11 are respectively made of parts of a specified length cut from a rod (wherein the upper section 10 and the lower section 11 can be cut to different lengths, and the lengths of the two can be arbitrarily adjusted according to the location of the tumor).

[0070] In some embodiments, the support member includes a plurality of second support members 13 of different lengths and a first support member 12 in contact with the radiation source, and the fixing member includes a plurality of second fixing members 15 and a first fixing member 14 in contact with the radiation source; when selecting the support member and the fixing member, the positions of the first support member 12 and the first fixing member 14 always remain unchanged; the first ends of the support member and the second fixing member 15 are respectively provided with protrusions 17, and the second ends of the second support member 13 and the fixing member are respectively provided with first grooves 16 matching with the protrusions 17 to ensure that adjacent support members or adjacent fixing members can be tightly combined, and at the same time, the first groove 16 can provide a force-bearing space for the guide wire. When in use, the end of the guide wire is aligned with the first groove 16, so that the support member and the fixing member can be easily passed into the sub-cavity.

[0071] In some embodiments, a second groove for accommodating the radiation source 7 is provided at one end of the upper section 10 and the lower section 11 (or the first fixing member 14 and the first supporting member 12) that contacts the radiation source 7, wherein the inner diameter of the second groove is consistent with the outer diameter of the radiation source, and the two second grooves cooperate with each other to clamp the two ends of the radiation source to prevent it from shifting.

[0072] In some embodiments, a cover is further provided at the open end of the sub-cavity to prevent the upper section 10 from sliding out of the sub-cavity, and the total length of the lower section 11, the radiation source 7 and the upper section 10 is the same as the internal length of the sub-cavity 3, so that when the cover is closed, the end of the upper section 10 close to the cover can be supported to prevent the upper section 10, the radiation source 7 and the lower section 11 located inside the sub-cavity from being displaced.

[0073] In some embodiments, the positioning assembly includes multiple groups of components (including upper sections 10, lower sections 11 or first fixing members and first supporting members of various specifications) having second grooves with different inner diameters to accommodate radiation sources of different diameters.

[0074] In some embodiments, due to differences in tumor size, the number of radiation sources placed in the sub-cavity 3 also varies accordingly. When the number of radiation sources is large, the positions of adjacent radiation sources may deviate, affecting the treatment effect. Therefore, in this solution, a sleeve assembly for limiting the radiation source is also provided between the upper section 10 and the lower section 11. The sleeve assembly includes a plurality of sleeves of different lengths, which can be selected according to the total length of the radiation source when used.

[0075] In some embodiments, the cross-sectional shape of the support member and the fixing member is consistent with the cross-sectional shape of the cavity of the auxiliary cavity, so that the support member and the fixing member can be just placed in the auxiliary cavity 3 while preventing the support member and the fixing member from shaking in the auxiliary cavity 3.

[0076] During specific use, the location and length of the tumor in the patient's esophagus are first determined through existing technologies such as ultrasound and CT, so as to determine the position where the radiation source should be located in the main body of the gastric tube. At the same time, since the radiation source has a fixed length, the number of radiation sources to be placed in the auxiliary cavity is determined according to the length of the tumor; then the length of the lower segment to be placed in the auxiliary cavity is calculated to ensure that the radiation source is located at the target position, and then the lower segment of the corresponding length is selected and placed in the auxiliary cavity, and then the radiation source of the corresponding length of the tumor is placed, and finally the upper and lower segments of the corresponding length are placed to cooperate to fix the radiation source, so that the radiation source is finally made to correspond to the tumor, thereby ensuring a better treatment effect.

[0077] This scheme uses a radiation source corresponding to the length of the tumor, and selects upper and lower segments of different lengths to adjust and fix the position of the radiation source in combination with the position of the radiation source, so that the radiation source exactly corresponds to the tumor, effectively improving the treatment effect.

[0078] Embodiment 4

[0079] The difference between this embodiment and embodiments one, two and three is that: this embodiment adopts the gastric tube main body with a main cavity and a sub-cavity structure in the embodiments, and a guide wire assembly of different specifications for placing a radiation source into a specified position of the sub-cavity; the difference between this guide wire and the guide wire in embodiment two is that the guide wire in this embodiment is provided with a cavity for accommodating the radiation source inside, and a fixing mechanism for fixing the guide wire to the gastric tube main body is provided at one end of the guide wire located outside the gastric tube main body.

[0080] During specific use, the location and length of the tumor in the patient's esophagus are first determined by existing technologies such as ultrasound and CT, and then the location where the radiation source should be located in the gastric tube body and the number of radiation sources that need to be placed are determined by calculation. At the same time, the length of the guide wire extended into the gastric tube body is calculated to determine the required guide wire length, and a guide wire of corresponding length is selected from the guide wire assembly. Then, the radiation source is placed at the bottom of the guide wire cavity, and then the guide wire is extended into the secondary cavity so that the radiation source corresponds to the tumor, and finally the guide wire is fixed by a fixing mechanism.

[0081] This solution places the radiation source into the guide wire and then extends the guide wire into the auxiliary cavity, so that the radiation source is in place in one step. The operation is simple and convenient, which effectively improves the operating efficiency while ensuring the treatment effect.

[0082] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0083] The embodiments of the utility model are described above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the utility model, ordinary technicians in this field can also make many forms without departing from the scope of protection of the utility model and the claims, which all fall within the protection of the utility model.

Claims

1. A gastric tube for treating esophageal tumors, characterized in that: The invention comprises a stomach tube body, a guide wire and a length-adjustable positioning assembly, wherein the stomach tube body is provided with a main cavity for feeding and at least one auxiliary cavity for accommodating a radiation source. The positioning assembly comprises an upper section with a first length and a lower section with a second length. When the radiation source is placed in the auxiliary cavity for positioning, the guide wire sequentially places the lower section, the radiation source and the upper section in the auxiliary cavity, and the upper section and the lower section cooperate to clamp and fix the radiation source in the auxiliary cavity. Wherein, the upper section with the first length is composed of a plurality of fixing members of different lengths selected in advance according to the location of the tumor and the length of the secondary cavity; the lower section with the second length is composed of a plurality of supporting members of different lengths selected in advance according to the location of the tumor; Alternatively, the upper section and the lower section are portions of a specified length cut from a rod according to the location of the tumor and the length of the secondary cavity.

2. A gastric tube for treating esophageal tumors according to claim 1, characterized in that: The support member includes a plurality of second support members and a first support member in contact with the radiation source, the fixing member includes a plurality of second fixing members and a first fixing member in contact with the radiation source, the first ends of the support member and the second fixing member are respectively provided with protrusions, and the second ends of the second support member and the fixing member are respectively provided with first grooves matching with the protrusions.

3. A gastric tube for treating esophageal tumors according to claim 1, characterized in that: The ends of the upper section and the lower section contacting the radiation source are respectively provided with second grooves for accommodating the radiation source.

4. A gastric tube for treating esophageal tumors according to claim 2, characterized in that: The ends of the first supporting member and the first fixing member contacting the radiation source are respectively provided with second grooves for accommodating the radiation source.

5. A gastric tube for treating esophageal tumors according to claim 1, characterized in that: A sleeve for limiting the position of the radiation source is also provided between the upper section and the lower section.

6. A gastric tube for treating esophageal tumors according to claim 1, characterized in that: The cross-sectional shapes of the support member and the fixing member are consistent with the cross-sectional shape of the cavity of the auxiliary cavity, so that the support member and the fixing member can just be placed in the auxiliary cavity.

7. A gastric tube for treating esophageal tumors according to claim 1, characterized in that: The main lumen passes through the stomach tube body and is consistent with the length of the stomach tube body.

8. A gastric tube for treating esophageal tumors according to claim 7, characterized in that: The secondary lumen extends from the first end to the second end of the stomach tube body, and the length of the secondary lumen is smaller than the length of the main lumen.

9. A gastric tube for treating esophageal tumors according to claim 1, characterized in that: A plurality of side holes are provided on the cavity wall of the main cavity, and the side holes are located at the second end of the stomach tube body.

10. A gastric tube for treating esophageal tumors according to claim 1, characterized in that: The at least one sub-lumen includes two sub-lumens, and the two sub-lumens are symmetrical about the central axis of the stomach tube body.

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