Local chemotherapy device for esophageal cancer

Abstract

The invention discloses an esophageal cancer local chemotherapy device, and belongs to the technical field of chemotherapy auxiliary equipment, the esophageal cancer local chemotherapy device comprises a sealing device, the sealing device comprises a drug delivery tube, the lower end of the drug delivery tube is fixedly connected with a zigzag mounting tube, and the side wall of the zigzag mounting tube is rotatably connected with a plurality of hinge connecting rods; the lower end of the zigzag mounting tube is fixedly connected with a closed collecting film fixedly connected with the upper ends of the hinge connecting rods, the interior of the zigzag mounting tube is slidably connected with a movable block, and the device can be tightly attached to the inner wall of the esophagus through unfolding of the closed collecting film to form an effective closed structure, so that the position of medicine at the focus is locked, and the medicine is prevented from being damaged. Therefore, the local treatment effect of the medicine can be improved, meanwhile, the medicine is prevented from flowing to the stomach along with natural physiological movement of the esophagus, stimulation to the digestive tract of a patient is reduced, meanwhile, the influence on normal tissue of the patient is reduced, precise treatment is achieved, and the health of the patient is protected to the maximum extent.

Description

Technical Field

[0001] The invention relates to the technical field of chemotherapy auxiliary equipment, in particular to a local chemotherapy device for esophageal cancer. Background Art

[0002] Esophageal cancer refers to a malignant tumor that occurs in the esophagus (the tube connecting the throat and the stomach). Its main types include squamous cell carcinoma and adenocarcinoma. The causes of esophageal cancer are varied. Common risk factors include long-term smoking, excessive drinking, chronic inflammation, gastroesophageal reflux disease, and certain eating habits (such as eating overheated food and lack of fresh fruits and vegetables). Early symptoms may not be obvious, but as the disease progresses, patients may experience symptoms such as difficulty swallowing, weight loss, chest pain and cough. Due to the difficulty in early diagnosis, once esophageal cancer is diagnosed, it is often in the late stage. Treatment methods include surgery, radiotherapy and chemotherapy. Therefore, early prevention and regular examinations are particularly important. Existing treatments for esophageal Local chemotherapy for cancer is local perfusion chemotherapy, which is a treatment method for esophageal cancer. It injects anti-tumor drugs directly into the blood vessels or tissues around the esophageal tumor to increase the concentration of drugs at the tumor site and reduce systemic side effects. To achieve this method, it is usually necessary to accurately locate the tumor under image guidance and use a specific catheter to deliver chemotherapy drugs to the target site. This method can improve the local efficacy of drugs, help control tumor growth, relieve symptoms, and in some cases can be combined with surgery or radiotherapy to achieve better therapeutic effects. Local perfusion chemotherapy is usually suitable for patients with localized lesions and must be performed in professional medical institutions to ensure safety and effectiveness.

[0003] A Chinese patent discloses a local chemotherapy device for esophageal cancer (authorization announcement number CN113730776B), which includes a skeleton catheter and a drug inlet tube, wherein the inner center of the skeleton catheter is provided with a drug inlet tube, and the airbag assembly includes an airbag, a circular baffle, a compression spring, a cavity, and an airbag inner tube, wherein a plurality of the airbag inner tubes are respectively located on the upper and lower sides of the outer wall of the skeleton catheter, wherein the circular baffle is fixedly connected to the skeleton catheter, and the two sides of the compression spring are respectively fixedly connected to the circular baffle and the inner wall of the airbag inner tube. The local chemotherapy device for esophageal cancer, through the cooperation among the groove block, the base, the first arc groove, the second arc groove, the airbag and the skeleton catheter, enables the groove block to drive the protrusion of the base to move from the first arc groove to the inside of the second arc groove, so that the base can drive the airbag to move outward for a distance, thereby extending the size between the two airbags, thereby avoiding the problem that the prior art cannot adjust the relative position of the positioning airbag according to the size of the lesion.

[0004] However, in the above-mentioned patent, there is a lack of effective drug recovery mechanism during the process of drug infusion chemotherapy of the lesion, which results in the inability to fully recover the drug after the treatment. As a result, a large amount of residual drug may flow into the patient's digestive tract along the esophagus. These residual drugs may not only irritate the mucosa of the digestive tract, causing discomfort and other complications to the patient, such as nausea, vomiting and abdominal pain, but also may have a negative impact on the intestinal flora and more serious digestion and absorption disorders. Therefore, based on the above problems, a new type of local chemotherapy device for esophageal cancer is proposed. This device is designed to solve the problem of poor drug recovery and ensure that unused drugs can be effectively collected during chemotherapy, thereby reducing irritation to the digestive tract, protecting the balance of intestinal flora, and reducing the overall physical burden on patients. Summary of the invention

[0005] The object of the present invention is to provide a local chemotherapy device for esophageal cancer to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A local chemotherapy device for esophageal cancer comprises a closed device, which comprises a drug delivery tube, a zigzag mounting tube fixedly connected to the lower end of the drug delivery tube, a plurality of hinge connecting rods rotatably connected to the side wall of the zigzag mounting tube, a closed collecting membrane fixedly connected to the upper ends of the plurality of hinge connecting rods fixedly connected to the lower end of the zigzag mounting tube, a movable block slidably connected to the inside of the zigzag mounting tube, a plurality of sliding connecting blocks fixedly connected to the movable block slidably connected to the side wall of the zigzag mounting tube, a connecting oblique rod fixedly connected to the side wall of the sliding connecting block, a hinged sliding block hinged to the connecting oblique rod slidably connected to the hinge connecting rod, a dual-function component for extracting drugs is installed inside the lower end of the zigzag mounting tube, a pressure driving component for driving the movable block to move is fixedly connected to the inside of the drug delivery tube, and a drug spraying port for discharging drugs is fixedly connected to the side wall of the drug delivery tube.

[0008] As a further solution of the present invention, the dual-function component includes a transmission gas box fixedly connected to the lower end of the zigzag mounting tube, the upper end of the transmission gas box is connected to a telescopic airbag, and the upper end of the telescopic airbag is fixedly connected to the movable block.

[0009] As a further solution of the present invention, the lower end of the hinge connecting rod is connected to a connecting pipe rotatably connected to the side wall of the tortuous mounting tube, the upper side wall of the transmission gas box is connected to a transmission one-way tube, and the transmission one-way tube is rotatably connected to the connecting pipe.

[0010] As a further solution of the present invention, the upper ends of the plurality of hinge connecting rods are connected to the same annular sealing bag fixedly connected to the closed collecting membrane, and the annular sealing bag and the closed collecting membrane are both made of elastic material.

[0011] As a further solution of the present invention, the transmission gas box is connected to a plurality of one-way drug suction tubes, and one ends of the plurality of one-way drug suction tubes are all arranged through the lower end side wall of the zigzag installation tube.

[0012] As a further solution of the present invention, the pressure drive assembly includes an annular block slidably connected to the inside of the drug delivery tube, and a plurality of push rods are fixedly connected between the annular block and the movable block.

[0013] As a further solution of the present invention, a fixed ring block located on the upper side of the ring block is slidably connected inside the drug delivery tube, and a connecting spring is fixedly connected between the fixed ring block and the ring block.

[0014] As a further solution of the present invention, a guide tube that runs through the ring block is fixedly connected to the lower side wall of the fixed ring block, a transmission rod is inserted into the guide tube, the lower end of the transmission rod is fixedly connected to a limiting plate, and the upper end of the transmission rod is fixedly connected to a sealing plug.

[0015] As a further solution of the present invention, two magnetic plugs penetrating the guide tube are slidably connected to the transmission plug rod, and two drag-reducing rollers that resist the magnetic plugs are rotatably connected to the inner side wall of the annular block.

[0016] As a further solution of the present invention, a magnetic ring is fixedly connected to the inner wall of the drug delivery tube, and the magnetic ring is magnetically attracted to the magnetic plug.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. When the present invention is used, the closed collection membrane can be unfolded to closely fit the inner wall of the esophagus to form an effective closed structure, thereby locking the position of the drug at the lesion. This not only improves the local therapeutic effect of the drug, but also avoids the drug from flowing to the stomach with the natural physiological movement of the esophagus, reduces the irritation of the patient's digestive tract, and reduces the impact on the patient's normal tissues, thereby achieving precise treatment and protecting the patient's health to the greatest extent.

[0019] 2. When the present invention is used, the dual-function component can expand the annular sealing bag when the closed collection membrane is unfolded. The expansion of the annular sealing bag can not only improve the sealing performance between the closed collection membrane and the inner wall of the esophagus, but also reduce the discomfort caused to the patient by the contact between the drug delivery tube and the esophagus when the drug delivery tube moves.

[0020] 3. When the present invention is used, the pressure-driven component can make the contact pressure between the closed collection membrane and the esophageal wall equal for different groups of people and esophageas of different diameters, thereby avoiding excessive pressure of the closed collection membrane on the esophagus and causing discomfort to the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a diagram of the state after the closed collection membrane in the local chemotherapy device for esophageal cancer is unfolded;

[0022] Figure 2 A three-dimensional image of a local chemotherapy device for esophageal cancer;

[0023] Figure 3 It is a schematic diagram of the structure of the closed device part in the local chemotherapy device for esophageal cancer;

[0024] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0025] Figure 5 It is a schematic diagram of the structure of the hinged sliding block part in the local chemotherapy device for esophageal cancer;

[0026] Figure 6 It is a schematic diagram of the structure of the zigzag installation tube part in the local chemotherapy device for esophageal cancer;

[0027] Figure 7 It is a schematic diagram of the structure of the pressure-driven component in the local chemotherapy device for esophageal cancer;

[0028] Figure 8 This is a diagram of the state after the fixed ring block and the transmission rod in the local chemotherapy device for esophageal cancer are separated.

[0029] In the figure:

[0030] 1. Closing device; 101. Drug delivery tube; 102. Bend installation tube; 103. Hinge connecting rod; 104. Closing collection membrane; 105. Moving movable block; 106. Sliding connecting block; 107. Articulated sliding block; 108. Connecting diagonal rod;

[0031] 2. Dual-function component; 201. Transmission gas box; 202. Telescopic airbag; 203. Connecting pipe; 204. Transmission one-way tube; 205. Drug suction one-way tube;

[0032] 3. Pressure drive assembly; 301. Ring block; 302. Push rod; 303. Connecting spring; 304. Fixed ring block; 305. Guide tube; 306. Transmission plug; 307. Limit plate; 308. Sealing plug; 309. Magnetic plug; 310. Drag reduction roller; 311. Magnetic ring sheet;

[0033] 4. Annular sealing capsule;

[0034] 5. Spray port. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Embodiment 1

[0037] See also Figure 1 to Figure 4 In an embodiment of the present invention, a local chemotherapy device for esophageal cancer includes a closed device 1, which includes a drug delivery tube 101 for inserting into the esophagus. The top of the drug delivery tube 101 is connected to a syringe for injecting anticancer drugs. The structure and principle of the syringe are prior art and are not described in detail herein. The lower end of the drug delivery tube 101 is connected to and fixedly connected to a zigzag mounting tube 102. The side wall of the zigzag mounting tube 102 is configured to be concave and convex, so as to better accommodate the hinge connecting rod 103 and prevent the hinge connecting rod 103 from protruding too much, causing the drug delivery tube 101 to damage the esophagus when moving. The lower end of the zigzag mounting tube 102 is configured to be semicircular, so as to further reduce the damage to the esophagus when the zigzag mounting tube 102 moves. The multiple recessed portions on the wall are rotatably connected to multiple hinge connecting rods 103 through connecting pipes 203, and a closed collection membrane 104 is fixedly connected to the inner side wall and the upper ends of the multiple hinge connecting rods 103 through medical adhesive on the side wall of the lower end of the zigzag mounting tube 102. A movable block 105 matching the internal cross-sectional shape of the zigzag mounting tube 102 is slidably connected inside the zigzag mounting tube 102, and multiple sliding connecting blocks 106 fixedly connected to the side walls of the movable blocks 105 are slidably connected on the side walls of the zigzag mounting tube 102 by means of openings in the recessed portions. An inclined connecting oblique rod 108 is fixedly connected to the side walls of the sliding connecting blocks 106, and a hinged sliding block 107 hinged to the connecting oblique rod 108 is slidably connected to the inner wall of the hinge connecting rod 103 by means of sliding grooves.

[0038] When the movable block 105 moves downward, it will also drive multiple sliding connection blocks 106, so that the sliding connection block 106 drives the hinged sliding block 107 to push the side wall of the hinge connecting rod 103 through the connecting inclined rod 108 fixed thereto. As the sliding connection block 106 continues to move downward, the hinged sliding block 107 will drive the hinge connecting rod 103 to gradually unfold, so that the hinge connecting rod 103 can drive the closed collection membrane 104 to unfold and close the esophagus, thereby effectively preventing the drug from entering the stomach through the esophagus and affecting the digestive tract.

[0039] A dual-function component 2 for extracting drugs and enabling the annular sealing bag 4 to expand is installed inside the lower end of the zigzag installation tube 102, a pressure driving component 3 for driving the movable block 105 to move and control the expansion pressure of the closed collection membrane 104 through the drug discharge pressure is fixedly connected inside the drug delivery tube 101, and a drug spray port 5 for discharging drugs is fixedly connected to the side wall of the drug delivery tube 101.

[0040] The dual-function component 2 includes a transmission gas box 201 fixedly connected to the lower end of the zigzag mounting tube 102, the upper end of the transmission gas box 201 is connected to a telescopic airbag 202 that can be telescopically folded, and the upper end of the telescopic airbag 202 is fixed to the movable block 105 by bonding, the lower end side wall of the hinge connecting rod 103 is connected to a plurality of connecting pipes 203 that are rotatably connected to the side wall of the zigzag mounting tube 102, the upper side wall of the transmission gas box 201 is connected to a plurality of transmission one-way tubes 204, and the plurality of transmission one-way tubes 204 are respectively rotatably connected to the connecting pipes 203 through mechanical seals, and the upper ends of the plurality of hinge connecting rods 103 are connected to the same closed collection membrane 104 is an annular sealing bag 4 fixed by glue, and the annular sealing bag 4 and the closed collection membrane 104 are both made of elastic material, the side wall of the transmission gas box 201 is connected with multiple drug suction one-way tubes 205, and one ends of the multiple drug suction one-way tubes 205 all pass through the lower end side wall of the zigzag installation tube 102 and are located inside the closed collection membrane 104, and one-way valves are installed inside the multiple transmission one-way tubes 204 and the drug suction one-way tubes 205, so that when the telescopic airbag 202 is compressed, the gas inside the telescopic airbag 202 is discharged through the transmission one-way tube 204, and when the telescopic airbag 202 is stretched, it can pass through negative pressure to allow air to enter through the drug suction one-way tube 205.

[0041] When the movable block 105 moves downward, the telescopic airbag 202 is in a compressed state, so that the air inside it is injected into the hinge connecting rod 103 through the transmission one-way tube 204, and the annular sealing bag 4 is expanded. On the one hand, it can avoid the discomfort caused by the direct contact between the upper end of the hinge connecting rod 103 and the esophagus, and on the other hand, it can also improve the sealing between the closed collection membrane 104 and the inner wall of the esophagus, thereby improving the drug collection effect. After the drug is injected into the lesion, the residual drug will flow to the inside of the expanded closed collection membrane 104, which effectively collects the drug. When the movable block 105 moves upward, the telescopic airbag 202 can be stretched. At this time, the drugs collected in the closed collection membrane 104 can be absorbed by multiple drug suction one-way tubes 205, thereby avoiding drug leakage when the drug delivery tube 101 is pulled out.

[0042] Embodiment 2

[0043] See also Figures 4 to 8Based on Example 1, the pressure driving component 3 includes an annular block 301 slidably connected to the inside of the drug delivery tube 101, three annularly distributed push rods 302 are fixedly connected between the annular block 301 and the side wall opposite to the movable block 105, a fixed annular block 304 located on the upper side of the annular block 301 is slidably connected inside the drug delivery tube 101, a connecting spring 303 is fixedly connected between the fixed annular block 304 and the side wall opposite to the annular block 301, a guide tube 305 arranged to penetrate the annular block 301 is fixedly connected to the lower side wall of the fixed annular block 304, a transmission plug rod 306 penetrating the fixed annular block 304 is plugged into the guide tube 305, and the lower end of the transmission plug rod 306 is fixedly connected to A limit plate 307 that can abut against the guide tube 305, a sealing plug 308 that is slidably connected to the inside of the drug delivery tube 101 is fixedly connected to the upper end of the transmission rod 306, and two magnetic plugs 309 that are arranged to penetrate the guide tube 305 are slidably connected to the left and right side walls of the transmission rod 306, and two holes are drilled on the side wall of the guide tube 305 so that the magnetic plug 309 can penetrate the holes and penetrate the guide tube 305, the annular block 301 is rotatably connected to the inner wall of the magnetic plug 309, and two drag-reducing rollers 310 that abut against the magnetic plug 309 are connected, and a magnetic ring piece 311 is fixedly connected to the inner wall of the drug delivery tube 101, and the magnetic ring piece 311 is magnetically attracted to the magnetic plug 309.

[0044] When the syringe is injecting, the pressure of the medicine forces the sealing plug 308 to move downward. As the sealing plug 308 moves downward, it moves downward together through the magnetic plug 309, the guide tube 305 and the fixed ring block 304. The fixed ring block 304 drives the annular block 301 to move through the connecting spring 303. The annular block 301 drives the movable block 105 to move downward through the push rod 302, so that the movable block 105 spreads the closed collection membrane 104 through the closing device 1. When the closed collection membrane 104 spreads and contacts the esophageal wall, the resistance encountered by the annular block 301 moving downward gradually increases. At this time, the connecting spring 303 will also be gradually compressed, so that the magnetic plug 309 gradually moves to the lower side of the annular block 301. When the connecting spring 303 is pressed, the magnetic plug 309 is pressed downward to the lower side of the annular block 301. When the spring 303 is compressed to a certain extent, the magnetic plug 309 separates from the annular block 301, and then quickly magnetically adsorbs to the magnetic ring piece 311 under the action of magnetic force, and uses magnetic force and friction to fix the fixed ring block 304 and the guide tube 305. In this way, when facing esophageas of different diameters, the contact pressure between the closed collection membrane 104 and the esophageal wall can be equal. When the magnetic plug 309 is adsorbed to the magnetic ring piece 311, the magnetic plug 309 will also separate from the transmission plug 306, so that the transmission plug 306 can no longer drive the guide tube 305 to move through the magnetic plug 309. When the sealing plug 308 moves down to the lower side of the spray port 5, the medicine on the upper side of the sealing plug 308 is sprayed out from the spray port 5 to treat the lesion.

[0045] When the drug injection is completed, the air inside the drug delivery tube 101 needs to be pumped out through a syringe to generate negative pressure inside the drug delivery tube 101, thereby sucking the sealing plug 308 upward, so that the sealing plug 308 pushes the guide tube 305 upward through the limit plate 307, and the annular block 301 pulls the movable block 105 upward through the push rod 302, and the movable block 105 drives the hinged sliding block 107 upward through the sliding connecting block 106 and the connecting inclined rod 108, thereby pulling the hinge connecting rod 103 to gradually close, and the annular sealing bag 4 is still in an expanded state at this time, which can prevent the hinge connecting rod 103 from contacting the esophagus and causing damage when the drug delivery tube 101 is extracted.

[0046] The working principle of the present invention is:

[0047] When the present invention is in use, first, the medical staff inserts the drug delivery tube 101 from the patient's mouth into the esophagus. When the drug spray port 5 moves to the side of the lesion in the esophagus, the staff pushes the syringe to cause the drug to enter the drug delivery tube 101 through the syringe. Under the influence of the pressure of the drug, the sealing plug 308 moves downward, and the downward movement of the sealing plug 308 drives the magnetic plug block 309, the guide tube 305 and the fixed ring block 304 to move downward together. The fixed ring block 304 pushes the ring block 301 downward through the connecting spring 303, and the ring block 301 drives the movable block 105 to move downward through the push rod 302. When the movable block 105 moves downward, it will also drive multiple sliding connection blocks 106 to move. These sliding connection blocks 106 push the hinged sliding block 107 through the connecting inclined rod 108 to push the hinged connecting rod 103. As the sliding connection block 106 continues to move downward, the hinged sliding block 107 will gradually push the hinged connecting rod 103 to unfold, so that multiple hinged connecting rods 103 can open and unfold the closed collection membrane 104 to achieve closure of the esophagus.

[0048] When the closed collection membrane 104 is unfolded and contacts the esophageal wall, the closed collection membrane 104 is difficult to unfold further, resulting in a gradually increasing resistance to the downward movement of the annular block 301. At this time, the connecting spring 303 is also gradually compressed, so that the magnetic plug 309 can gradually move to the lower side of the annular block 301. When the connecting spring 303 is compressed to a certain extent due to the downward movement resistance of the annular block 301, the magnetic plug 309 is separated from the annular block 301, and then quickly magnetically adsorbed with the magnetic ring piece 311 under the action of magnetic force, so that the magnetic plug 309 can utilize magnetic force and friction force to move downward. , which plays a fixing role on the fixed ring block 304 and the guide tube 305. In this way, when facing different people and different diameters of esophagus, the contact pressure between the closed collection membrane 104 and the esophageal wall can be equal. When the magnetic plug 309 contacts the magnetic ring piece 311, the magnetic plug 309 will also separate from the transmission plug 306, so that the transmission plug 306 can no longer drive the guide tube 305 to move through the magnetic plug 309. When the sealing plug 308 moves down to the lower side of the spray port 5, the medicine on the upper side of the sealing plug 308 is sprayed out from the spray port 5 to treat the lesion.

[0049] When the movable block 105 moves downward, the movable block 105 will compress the telescopic airbag 202, so that the air inside it is injected into the hinge connecting rod 103 through the transmission one-way tube 204, and the annular sealing bag 4 will expand. On the one hand, it can avoid the discomfort caused by the direct contact between the upper end of the hinge connecting rod 103 and the esophagus, and on the other hand, it can also improve the sealing between the closed collection membrane 104 and the inner wall of the esophagus, and improve the drug collection effect. After the drug is injected into the lesion, the residual drug will flow to the inside of the expanded closed collection membrane 104, which will effectively collect the drug. When the movable block 105 moves upward, the telescopic airbag 202 can be stretched. At this time, the drugs collected in the closed collection membrane 104 can be absorbed by multiple drug suction one-way tubes 205, so as to avoid drug leakage when the drug delivery tube 101 is pulled out.

[0050] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A local chemotherapy device for esophageal cancer, comprising a sealing device (1), characterized in that: The sealing device (1) comprises a drug delivery tube (101), the lower end of the drug delivery tube (101) is fixedly connected to a zigzag mounting tube (102), a plurality of hinge connecting rods (103) are rotatably connected to the side wall of the zigzag mounting tube (102), the lower end of the zigzag mounting tube (102) is fixedly connected to a sealing collection membrane (104) fixedly connected to the upper ends of the plurality of hinge connecting rods (103), the interior of the zigzag mounting tube (102) is slidably connected to a movable block (105), and the side wall of the zigzag mounting tube (102) is slidably connected to a plurality of fixed movable blocks (105) A sliding connection block (106) is connected, a connecting inclined rod (108) is fixedly connected to the side wall of the sliding connection block (106), a hinged sliding block (107) hinged to the connecting inclined rod (108) is slidably connected to the hinged connection rod (103), a dual-function component (2) for extracting medicine is installed inside the lower end of the zigzag installation tube (102), a pressure driving component (3) for driving the movable block (105) to move is fixedly connected inside the medicine delivery tube (101), and a medicine spraying port (5) for discharging medicine is fixedly connected to the side wall of the medicine delivery tube (101).

2. The local chemotherapy device for esophageal cancer according to claim 1, characterized in that: The dual-function component (2) comprises a transmission gas box (201) fixedly connected to the interior of the lower end of the zigzag mounting tube (102); the upper end of the transmission gas box (201) is connected to a telescopic airbag (202), and the upper end of the telescopic airbag (202) is fixedly connected to the movable block (105).

3. The local chemotherapy device for esophageal cancer according to claim 2, characterized in that: The lower end of the hinge connecting rod (103) is connected to a connecting pipe (203) rotatably connected to the side wall of the zigzag mounting tube (102), and the upper side wall of the transmission gas box (201) is connected to a transmission one-way tube (204), and the transmission one-way tube (204) is rotatably connected to the connecting pipe (203).

4. The local chemotherapy device for esophageal cancer according to claim 3, characterized in that: The upper ends of the plurality of hinge connecting rods (103) are connected to a common annular sealing bag (4) fixedly connected to a closed collection membrane (104), and the annular sealing bag (4) and the closed collection membrane (104) are both made of elastic material.

5. The local chemotherapy device for esophageal cancer according to claim 3, characterized in that: The transmission gas box (201) is connected to a plurality of one-way drug suction tubes (205), and one end of each of the plurality of one-way drug suction tubes (205) is arranged to pass through the lower end side wall of the zigzag installation tube (102).

6. The local chemotherapy device for esophageal cancer according to claim 5, characterized in that: The pressure drive assembly (3) comprises an annular block (301) slidably connected inside the drug delivery tube (101), and a plurality of push rods (302) are fixedly connected between the annular block (301) and the movable block (105).

7. The local chemotherapy device for esophageal cancer according to claim 1, characterized in that: The medicine delivery tube (101) is slidably connected inside with a fixed ring block (304) located on the upper side of the ring block (301), and a connecting spring (303) is fixedly connected between the fixed ring block (304) and the ring block (301).

8. The local chemotherapy device for esophageal cancer according to claim 7, characterized in that: The lower side wall of the fixed ring block (304) is fixedly connected with a guide tube (305) which passes through the ring block (301); a transmission rod (306) is inserted into the guide tube (305); the lower end of the transmission rod (306) is fixedly connected with a limit plate (307); and the upper end of the transmission rod (306) is fixedly connected with a sealing plug (308).

9. The local chemotherapy device for esophageal cancer according to claim 8, characterized in that: The transmission plug rod (306) is slidably connected to two magnetic plug blocks (309) that penetrate the guide tube (305), and the inner side wall of the annular block (301) is rotatably connected to two drag-reducing rollers (310) that abut against the magnetic plug blocks (309).

10. The local chemotherapy device for esophageal cancer according to claim 8, characterized in that: The inner wall of the drug delivery tube (101) is fixedly connected with a magnetic ring piece (311), and the magnetic ring piece (311) and the magnetic plug block (309) are magnetically attracted to each other.

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