Intestinal administration pushing device for children

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a child intestinal administration pushing device which comprises an injector, and the injection end of the injector is connected with an administration tube; the dosing head is connected to the end part of the dosing tube; the exhaust mechanism is arranged on the dosing pipe and is used for exhausting air in the dosing pipe; the first plugging piece is arranged on the exhaust mechanism; the second plugging piece is arranged on the dosing head; the liquid spraying mechanism is arranged on the dosing head and is used for uniformly spraying the liquid medicine into the intestinal tract of the patient; and the pressure regulating mechanism is also arranged on the dosing pipe and is communicated with the exhaust mechanism. Air in the administration pipeline can be effectively exhausted, accurate administration of liquid or solid medicine is achieved, the pressure of the blocking air bag can be adjusted according to the condition of a child patient, and the safety, comfort and treatment effect of pediatric intestinal administration are improved.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a child intestinal drug delivery device. Background Technology

[0002] In pediatric clinical treatment, enteral administration is sometimes necessary. Currently, conventional enteral administration devices typically consist of a drug injector (such as a syringe), a connecting tubing, and an anal catheter. During the procedure, healthcare professionals insert the catheter into the child's intestine and then push the syringe plunger to inject the medication into the intestine through the tubing and catheter.

[0003] For example, in the infant enema device described in Chinese patent application number CN202220717461.0, the insertion depth can be determined according to the child's age when performing an enema on the child. The administration tube is then inserted into the child's anus, and the scale is observed during insertion. After reaching the insertion depth range, the administration syringe is pushed, so that the liquid in the administration syringe is sprayed onto the child's intestines through the administration tube and the guide hole. After the injection is completed, the drug blocking device is pushed to block the child's anus to prevent the liquid from flowing back.

[0004] While intestinal drug delivery devices of the types described above can achieve the purpose of drug delivery, they still have some shortcomings in practical use: First, there is a problem with residual air in the delivery device before medication is administered. This air can enter the intestines before the medication, accumulating in the rectal ampulla and causing adverse reactions such as abdominal distension and pain, defecation reflex, and uneven drug distribution. In pediatric clinical treatment, enteral administration is commonly used, but air entering the intestines can easily cause discomfort in children, affecting treatment compliance and safety. Secondly, the drug delivery system has limitations, only applicable to liquid medications and unable to deliver solid medications (such as powders, granules, capsules, etc.). This single design concept has obvious drawbacks in clinical application. For example, when a child's treatment requires the combined use of liquid and solid medications, medical staff must use multiple sets of delivery equipment, which increases operational complexity and time costs, and may also increase the risk of cross-infection due to frequent equipment changes, as well as causing additional pain and discomfort to the child. Summary of the Invention

[0005] The purpose of this invention is to provide a pediatric intestinal drug delivery device that can effectively eliminate air in the drug delivery tubing, achieve precise drug delivery of liquid or solid drugs, and adjust the pressure of the occlusion balloon according to the child's condition, thereby improving the safety, comfort, and therapeutic effect of pediatric intestinal drug delivery.

[0006] The specific technical solution adopted by this invention is as follows: A pediatric intestinal drug delivery device includes a syringe, the injection end of which is connected to a drug delivery tube; A drug delivery head, which is connected to the end of a drug delivery tube; An exhaust mechanism, which is disposed on the drug delivery tube, is used to exhaust air from the drug delivery tube; The first sealing element is disposed on the exhaust mechanism and is used to control the closing of the exhaust mechanism; The second sealing element is disposed on the drug delivery head; A spraying mechanism is provided on the drug delivery head for uniformly spraying the drug solution into the patient's intestines; A pressure regulating mechanism is also provided on the drug delivery tube and is connected to the exhaust mechanism.

[0007] In a preferred embodiment, the administration tube and the administration head are fixedly connected and both are made of medical-grade materials.

[0008] In a preferred embodiment, the drug delivery head is provided with a transfer groove and a drug storage groove, and the drug storage groove is located at the end away from the drug delivery tube. The end of the drug storage groove is rotatably connected to a sealing plate, and the sealing plate is provided with a handle groove.

[0009] In a preferred embodiment, the venting mechanism includes venting grooves arranged in a ring on the inner wall of the administration tube. A one-way venting valve is installed in the venting grooves. The administration tube also has an venting channel, one end of which is connected to the venting groove. The administration tube also has an annular groove, which is connected to the other end of the venting channel. The administration tube also has an air bladder, and the venting channel passes through the air bladder and is interconnected with it.

[0010] In a preferred embodiment, the one-way exhaust valve is a duckbill valve.

[0011] In a preferred embodiment, the first sealing component includes an insert rod that is piston-type inserted into the drug delivery head, with one end of the insert rod penetrating into the venting groove and forming a piston-type connection at the penetration point of the venting groove. A hollow cylinder is fixedly connected to one end of the insert rod located in the venting groove, and a lifting groove is provided at the other end of the insert rod. Two filter screens are fixedly connected to the inner wall of the hollow cylinder, and a filling layer is provided between the two filter screens.

[0012] In a preferred embodiment, the filling layer is a hydrophilic polymeric expansion material.

[0013] In a preferred embodiment, the second sealing element includes a piston rod, which is piston-type inserted into a partition between the transfer tank and the medicine storage tank. One end of the piston rod is fixedly connected to a fixed plate, and the fixed plate has a first through groove distributed in a ring. A compression spring is fixedly connected to one side of the fixed plate, and the other end of the compression spring is fixedly connected to the inner wall of the transfer tank. An adjusting rod is rotatably connected inside the piston rod. One end of the adjusting rod is fixedly fitted with a movable plate, and the movable plate is rotatably connected inside the fixed plate. The movable plate has a second through groove distributed in a ring. The adjusting rod is hollow and has a sealing plug embedded at its end.

[0014] In a preferred embodiment, the spraying mechanism includes a liquid storage tank, which is arranged in a ring on the drug delivery head. The drug delivery head is also provided with infusion holes arranged in a ring. One end of each infusion hole is connected to a transfer tank, and the other end is connected to the liquid storage tank. The liquid storage tank is provided with outlet holes arranged in an array.

[0015] In a preferred embodiment, the pressure regulating mechanism includes an exhaust hood, which is fixedly connected to the drug delivery tube, with one end of the exhaust hood communicating with an annular groove. The exhaust hood has exhaust holes arranged in an annular pattern near the end of the drug delivery tube. A piston plate is slidably connected inside the exhaust hood, and a spring is fixedly connected to one side of the piston plate. A pressure plate is fixedly connected to the other end of the spring. A guide rod is fixedly connected to one side of the pressure plate, and the other end of the guide rod extends through to the outside of the exhaust hood. A screw is threadedly connected to the exhaust hood, and the lower end of the screw is rotatably connected to the pressure plate.

[0016] The technical effects achieved by this invention are as follows: This invention effectively solves the problem of residual air in the tubing during intestinal drug administration by incorporating an exhaust mechanism, a first sealing element, and a pressure regulating mechanism. In the initial stage of injection, the medication pushes air through a one-way exhaust valve and exhaust channel into the airbag, causing the airbag to inflate and adhere to the intestinal wall to form a seal. As the medication contacts the filling layer, it rapidly absorbs and expands, blocking the exhaust channel and preventing medication leakage. This process removes air from the tubing before injection, preventing air from entering the intestine and causing bloating, pain, or affecting drug distribution, significantly improving the safety and comfort of drug administration. This invention features a drug storage tank and an openable sealing plate in the drug delivery head, enabling combined or separate administration of liquid and solid medications (such as powders, granules, capsules, etc.). Medical personnel can open the sealing plate to place solid medications into the storage tank. When subsequent saline or other medications are injected, water pressure pushes the sealing plate open, propelling the medication into the intestines. Simultaneously, the warm saline or medication helps the medication dissolve rapidly or its coating disintegrate, allowing for precise delivery of different types of medications using the same device. This avoids the cumbersome operation, increased time costs, and risk of cross-infection associated with changing equipment. This invention utilizes a pressure regulating mechanism (a combination of screw, spring, and piston plate) working in conjunction with an elastic airbag to form an adaptive pressure control system. Medical staff can adjust the airbag inflation level according to individual differences in the child (such as age and intestinal tolerance), ensuring both leak prevention and avoiding excessive pressure on the intestines. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the drug delivery tube and drug delivery head of the present invention; Figure 3 This is a schematic diagram of the internal structure of the exhaust hood of the present invention; Figure 4 This is a front sectional view of the drug delivery head and drug delivery tube of the present invention; Figure 5 This is the present invention. Figure 4 Left side view; Figure 6 This is the present invention. Figure 4 An enlarged schematic diagram of part A shown in the image; Figure 7 This is a cross-sectional view of the first sealing component of the present invention; Figure 8 This is the present invention. Figure 7 An enlarged schematic diagram of part B shown in the image; Figure 9 This is a top sectional view of the drug delivery head and drug delivery tube of the present invention; Figure 10 This is a schematic diagram of the structure of the second sealing component of the present invention; Figure 11 This is a cross-sectional view of the second sealing component of the present invention; Figure 12 This is an exploded view of the second sealing component of the present invention.

[0018] The attached diagram lists the components represented by each number as follows: 1. Syringe; 2. Dosing tube; 3. Dosing head; 4. Exhaust mechanism; 5. First sealing element; 6. Second sealing element; 7. Liquid spraying mechanism; 8. Pressure regulating mechanism; 31. Transfer tank; 32. Medicine storage tank; 33. Sealing plate; 41. Exhaust groove; 42. One-way exhaust valve; 43. Exhaust passage; 44. Annular groove; 45. Airbag; 51. Insert rod; 52. Hollow cylinder; 53. Filter screen; 54. Filling layer; 61. Piston rod; 62. Fixed plate; 63. Compression spring; 64. Adjusting rod; 65. Movable plate; 66. Sealing plug; 67. First through groove; 68. Second through groove; 71. Storage tank; 72. Infusion port; 73. Discharge port; 81. Exhaust hood; 82. Exhaust port; 83. Piston plate; 84. Spring; 85. Pressure plate; 86. Guide rod; 87. Screw. Detailed Implementation

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0021] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in a preferred embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments.

[0022] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0023] Please see the appendix Figures 1 to 4 As shown, this is the first embodiment of the present invention, which provides a child intestinal drug delivery device, including a syringe 1, the injection end of which is connected to a drug delivery tube 2; The drug delivery head 3 is connected to the end of the drug delivery tube 2, and the drug delivery tube 2 and the drug delivery head 3 are fixedly connected. The exhaust mechanism 4 is installed on the drug delivery tube 2 and is used to exhaust the air inside the drug delivery tube 2. The first sealing element 5 is disposed on the exhaust mechanism 4 and is used to control the closing of the exhaust mechanism 4; The second sealing element 6 is disposed on the drug delivery head 3; The spraying mechanism 7 is set on the drug delivery head 3 and is used to spray the drug solution evenly into the patient's intestines; Pressure regulating mechanism 8 is also installed on drug delivery tube 2 and is connected to exhaust mechanism 4.

[0024] In this embodiment, the syringe 1, the administration tube 2, and the administration head 3 are all made of medical-grade materials to ensure their safety and reliability during use. The administration tube 2 is designed to be soft and flexible to adapt to the curvature and softness of a child's intestines, reducing discomfort during administration. The administration head 3 is relatively rigid to ensure easy entry into a child's intestines, and its chamfered end design reduces damage to the intestinal wall.

[0025] The venting mechanism 4 includes a tiny valve that allows air to escape from the administration tube 2, thereby ensuring that the medication can be smoothly injected into the intestine and avoiding the risk of air embolism.

[0026] The spraying mechanism 7 evenly sprays the medication into the intestines, improving treatment effectiveness. The pressure regulating mechanism 8 allows medical staff to adjust the pressure as needed, further reducing discomfort and improving treatment efficacy.

[0027] After all components of the device are connected, the medication is injected into syringe 1. Then, lubricant is applied to the administration tube 2 and administration head 3, and the tubes are gently inserted into the anus until they are in the appropriate position.

[0028] Secondly, please refer to the following as well. Figure 4 , Figure 5 and Figure 9 The drug delivery head 3 is provided with a transfer groove 31 and a drug storage groove 32, and the drug storage groove 32 is located at the end away from the drug delivery tube 2. The end of the drug storage groove 32 is rotatably connected to a sealing plate 33, and the sealing plate 33 is provided with a handle groove.

[0029] In this embodiment, a torsion spring is installed on the rotating shaft of the sealing plate 33. The function of the torsion spring is to ensure that the two sealing plates 33 are tightly fitted in the initial state, thereby effectively sealing the opening of the medicine storage tank 32 (e.g., Figure 4 As shown, this design prevents leakage of medication from the storage tank 32 during insertion of the dispensing head 3, and the handle slot design facilitates manual opening of the sealing plate 33 by medical staff.

[0030] Secondly, please refer to again Figures 2 to 6 The exhaust mechanism 4 includes an exhaust groove 41, which is arranged in a ring on the inner wall of the administration tube 2. A one-way exhaust valve 42 is installed in the exhaust groove 41. An exhaust channel 43 is also provided on the administration tube 2, and one end of the exhaust channel 43 is connected to the exhaust groove 41. An annular groove 44 is also provided on the administration tube 2, and the annular groove 44 is connected to the other end of the exhaust channel 43. An air bladder 45 is also provided on the administration tube 2, and the exhaust channel 43 passes through the air bladder 45 and is interconnected. The one-way exhaust valve 42 is a duckbill valve.

[0031] Please refer to it again. Figures 6 to 8The first sealing component 5 includes a rod 51, which is piston-type inserted into the drug delivery head 3. One end of the rod 51 extends into the vent groove 41, forming a piston-type connection at the penetration point of the vent groove 41. A hollow cylinder 52 is fixedly connected to one end of the rod 51 inside the vent groove 41, and a lifting groove is provided at the other end of the rod 51. Two filter screens 53 are fixedly connected to the inner wall of the hollow cylinder 52, and a filling layer 54 is provided between the two filter screens 53. The filling layer 54 is a hydrophilic polymer expansion material (such as hydrophilic polyurethane, cross-linked sodium polyacrylate, etc.). The first sealing component 5 is detachably installed on the drug delivery head 3 and the drug delivery tube 2 for easy replacement after the filling layer 54 fails.

[0032] In this embodiment, the medication is injected into the administration tube 2 using a syringe 1. In this initial stage, as the medication flows along the administration tube 2, the air at the tip of the medication is compressed. Subsequently, the gas pressure gradually increases, eventually overcoming the opening pressure of the one-way exhaust valve 42. At this time, the compressed air in the administration tube 2 enters the exhaust groove 41 through the one-way exhaust valve 42, and then enters the exhaust channel 43 along the exhaust groove 41. Next, the air flows along the exhaust channel 43 from the air bladder 45, eventually flowing into the annular groove 44. As the air pressure in the exhaust channel 43 gradually increases, the air pressure at the air bladder 45 also increases accordingly, causing the air bladder 45 to inflate. The inflated air bladder 45 fits tightly against the patient's intestinal wall, forming a seal and effectively preventing the medication from flowing out of the body along the patient's intestines.

[0033] It should be noted that during this process, the hydrophilic expandable body is in a dry and loose state, with interconnected pores that allow gas to pass through. Because the filling layer 54 of the hydrophilic expandable body material is dry and porous, air can easily pass through the chamber containing the expandable body and enter the exhaust channel 43. At this time, air pressure alone is insufficient to push the second sealing element 6, therefore air cannot enter the transfer tank 31.

[0034] As syringe 1 continuously pushes the medication into the administration tube 2, the medication flows to the end of the administration tube 2 and first enters the venting groove 41, then flows along the venting groove 41 into the venting channel 43. A first sealing element 5 is provided at the end of the venting channel 43. When the medication enters the first sealing element 5 and comes into contact with the filling layer 54 of the hydrophilic swelling material, the hydrophilic swelling rapidly absorbs the water (or the medication itself) from the medication, causing significant volume expansion. The hydrophilic swelling completely fills its internal pores and blocks the entire flow channel, forming a dense liquid plug. At this point, although the venting channel 43 remains open, the medication is completely blocked by the swelling and cannot flow into the venting channel 43.

[0035] Please refer to it again. Figures 10 to 12The second sealing component 6 includes a piston rod 61, which is piston-type inserted into the partition between the transfer tank 31 and the medicine storage tank 32. One end of the piston rod 61 is fixedly connected to a fixed plate 62, and the fixed plate 62 has a first through groove 67 distributed in a ring on it. One side of the fixed plate 62 is fixedly connected to a compression spring 63, and the other end of the compression spring 63 is fixedly connected to the inner wall of the transfer tank 31. An adjusting rod 64 is rotatably connected inside the piston rod 61. One end of the adjusting rod 64 is fixedly fitted with a movable plate 65, and the movable plate 65 is rotatably connected inside the fixed plate 62. The movable plate 65 has a second through groove 68 distributed in a ring on it. The adjusting rod 64 is hollow and a sealing plug 66 is embedded at its end.

[0036] Please refer to it again. Figure 5 and Figure 9 The spraying mechanism 7 includes a liquid storage tank 71, which is arranged in a ring on the drug delivery head 3. The drug delivery head 3 is also provided with infusion holes 72 arranged in a ring. One end of the infusion hole 72 is connected to the transfer tank 31, and the other end is connected to the liquid storage tank 71. The liquid storage tank 71 is provided with outlet holes 73 arranged in an array.

[0037] In this embodiment, after the hydrophilic swelling body completes its expansion and achieves a seal, the medication is continuously injected into the administration tube 2 using the syringe 1. At this time, the medication cannot enter the venting channel 43. As the piston of the syringe 1 continues to push the medication towards the end of the administration tube 2, the hydraulic pressure gradually increases, which pushes the fixed plate 62 to move and compresses the compression spring 63. At this time, the first through groove 67 on the fixed plate 62 aligns with the second through groove 68 on the movable plate 65, allowing the medication to pass through the fixed plate 62 and the movable plate 65 and enter the left end of the transfer tank 31. Subsequently, the medication enters the storage tank 71 along the infusion hole 72 and finally flows out from the outlet hole 73, being injected into the patient's intestines. Since the venting operation has been completed beforehand, the situation where a large amount of air in the administration tube 2 enters the patient's intestines can be avoided.

[0038] When it is necessary to administer solid medications (such as powders, granules, capsules, etc.) into the intestines, medical staff open the sealing plate 33 and place the solid medication in the storage tank 32. Before placing the solid medication, rotate the adjusting rod 64. The rotation of the adjusting rod 64 drives the movable plate 65 to rotate, causing the second through groove 68 on the movable plate 65 to be misaligned with the first through groove 67 on the fixed plate 62. At this time, the liquid medication cannot pass through the fixed plate 62 and the movable plate 65 to enter the left end of the transfer tank 31. Simultaneously, remove the sealing plug 66 at the end of the adjusting rod 64.

[0039] At this moment, saline solution or medication is injected into syringe 1. Similarly, in the initial stage of injecting saline solution or medication into administration tube 2, the air in administration tube 2 is still expelled through the venting mechanism 4. Subsequently, when the saline solution or medication reaches the first sealing member 5, it comes into contact with the filling layer 54 made of hydrophilic expandable material in the first sealing member 5. Then, the filling layer 54 expands, sealing the venting channel 43. Since the sealing plug 66 at one end of the adjusting rod 64 has been removed at this time, the saline solution or medication can directly enter the drug storage tank 32 along the adjusting rod 64. As the saline solution or medication is injected, the hydraulic pressure in the drug storage tank 32 gradually increases. Subsequently, under the action of hydraulic pressure or liquid impact, the sealing plate 33 rotates, at which time the solid drug and saline solution or medication can be discharged into the patient's intestine from the opening. The sprayed saline solution or medication (temperature close to body temperature) can moisten the intestine on the one hand, and quickly melt and fix the drug (such as powder, granules or coated capsules) on the other hand, to ensure that the drug is released rapidly at the target location.

[0040] Please refer to it again. Figure 3 The pressure regulating mechanism 8 includes an exhaust hood 81, which is fixedly connected to the drug delivery tube 2. One end of the exhaust hood 81 is connected to the annular groove 44. The exhaust hood 81 has exhaust holes 82 arranged in annular pattern at one end near the drug delivery tube 2. A piston plate 83 is slidably connected inside the exhaust hood 81. A spring 84 is fixedly connected to one side of the piston plate 83. A pressure plate 85 is fixedly connected to the other end of the spring 84. A guide rod 86 is fixedly connected to one side of the pressure plate 85. The other end of the guide rod 86 extends to the outside of the exhaust hood 81. A screw 87 is threadedly connected to the exhaust hood 81. The lower end of the screw 87 is rotatably connected to the pressure plate 85.

[0041] In this embodiment, when the gas in the administration tube 2 is discharged, the gas enters the exhaust hood 81 through the annular groove 44. When the gas pressure exceeds a certain range, the pressure pushes the piston plate 83 upward, and the gas is then discharged through the exhaust port 82. After the pressure relief operation, the piston plate 83 returns to its initial position under the restoring force of the spring 84. At this time, the piston plate 83 blocks the exhaust port 82, and the gas can no longer be discharged. In this way, the gas pressure at the exhaust channel 43 and the airbag 45 can be kept within a preset range, avoiding excessive inflation of the airbag 45 due to excessive gas pressure, which could cause discomfort to the patient.

[0042] Furthermore, rotating the screw 87 moves the pressure plate 85. When the pressure plate 85 moves downward, it compresses the spring 84 between the pressure plate 85 and the piston plate 83, increasing the preload of the spring 84. At this time, a larger air pressure is required to push the piston plate 83 upward to perform the pressure relief operation. Therefore, the air pressure at the airbag 45 will also increase accordingly, and the expansion range of the airbag 45 will also increase. In this way, different air pressure values ​​can be set according to the patient's actual condition (for example, children of different ages have different intestinal diameters), thereby controlling the expansion range of the airbag 45, thus ensuring patient comfort while maintaining effective occlusion.

[0043] It should be noted that a blocking ring is fixedly connected to the inner wall of the exhaust cover 81, which restricts the lowest position of the piston plate 83.

[0044] The working principle of this invention is as follows: When the syringe 1 injects the medication, the compressed air in the administration tube 2 is discharged in one direction through the duckbill valve (i.e., one-way exhaust valve 42) in the exhaust groove 41, simultaneously triggering the expansion of the airbag 45 to adhere to the intestinal wall and form a physical blockage; then the hydrophilic swelling body (i.e., filling layer 54) in the first sealing member 5 swells rapidly upon contact with the medication, blocking the flow of the medication; then the medication pressure drives the piston-type second sealing member 6 to open, allowing the medication to enter the annular storage tank 71 with infusion holes 72 through the transfer tank 31, and finally be evenly sprayed into the intestine through the array of outlet holes 73; the pressure regulating mechanism 8 adjusts the preload of the spring 84 through the screw 87 to precisely control the inflation pressure of the airbag 45 to adapt to the intestinal environment of different children; when solid medication needs to be administered, the adjusting rod 64 is rotated to offset the through slots (first through slot 67 and second through slot 68), and the sealing plug 66 is removed, and the sealing plate 33 is opened by the hydraulic pressure of saline or medication to release the medication, while warm water is used to accelerate the dissolution of the medication.

[0045] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A pediatric intestinal drug delivery device, characterized in that: Includes a syringe (1), the injection end of which is connected to a drug delivery tube (2). A drug delivery head (3) is connected to the end of a drug delivery tube (2); An exhaust mechanism (4) is provided on the drug delivery tube (2) for exhausting the air inside the drug delivery tube (2); The first sealing element (5) is disposed on the exhaust mechanism (4) and is used to control the closing of the exhaust mechanism (4); The second sealing element (6) is disposed on the drug delivery head (3); The spraying mechanism (7) is disposed on the drug delivery head (3) and is used to spray the drug solution evenly into the patient's intestines; The pressure regulating mechanism (8) is also located on the drug delivery tube (2) and is connected to the exhaust mechanism (4).

2. The pediatric intestinal drug delivery device according to claim 1, characterized in that: The administration tube (2) and administration head (3) are fixedly connected and are both made of medical-grade materials.

3. The pediatric intestinal drug delivery device according to claim 1, characterized in that: The drug delivery head (3) is provided with a transfer slot (31) and a drug storage slot (32), and the drug storage slot (32) is located at the end away from the drug delivery tube (2). The end of the drug storage slot (32) is rotatably connected to a sealing plate (33), and the sealing plate (33) is provided with a handle slot.

4. The pediatric intestinal drug delivery device according to claim 1, characterized in that: The exhaust mechanism (4) includes an exhaust groove (41), which is arranged in a ring on the inner wall of the drug delivery tube (2). A one-way exhaust valve (42) is installed in the exhaust groove (41). An exhaust channel (43) is also provided on the drug delivery tube (2), and one end of the exhaust channel (43) is connected to the exhaust groove (41). An annular groove (44) is also provided on the drug delivery tube (2), and the annular groove (44) is connected to the other end of the exhaust channel (43). An air bladder (45) is also provided on the drug delivery tube (2), and the exhaust channel (43) passes through the air bladder (45) and is connected to each other.

5. A pediatric intestinal drug delivery device according to claim 4, characterized in that: The one-way exhaust valve (42) is a duckbill valve.

6. A pediatric intestinal drug delivery device according to claim 4, characterized in that: The first sealing component (5) includes a rod (51), which is piston-type inserted into the dispensing head (3), and one end of the rod (51) extends into the interior of the exhaust groove (41) and forms a piston-type connection at the penetration point of the exhaust groove (41). A hollow cylinder (52) is fixedly connected to one end of the rod (51) located in the exhaust groove (41), and a lifting groove is provided at the other end of the rod (51). Two filter screens (53) are fixedly connected to the inner wall of the hollow cylinder (52), and a filling layer (54) is provided between the two filter screens (53).

7. A pediatric intestinal drug delivery device according to claim 6, characterized in that: The filler layer (54) is a hydrophilic polymer expansion material.

8. A pediatric intestinal drug delivery device according to claim 3, characterized in that: The second sealing component (6) includes a piston rod (61), which is piston-type inserted into the partition between the transfer tank (31) and the medicine storage tank (32). One end of the piston rod (61) is fixedly connected to a fixed plate (62), and the fixed plate (62) has a first through groove (67) arranged in a ring. One side of the fixed plate (62) is fixedly connected to a compression spring (63), and the other end of the compression spring (63) is fixedly connected to the inner wall of the transfer tank (31). An adjusting rod (64) is rotatably connected inside the piston rod (61). One end of the adjusting rod (64) is fixedly fitted with a movable plate (65), and the movable plate (65) is rotatably connected inside the fixed plate (62). The movable plate (65) has a second through groove (68) arranged in a ring. The adjusting rod (64) is hollow and has a sealing plug (66) embedded at its end.

9. A pediatric intestinal drug delivery device according to claim 3, characterized in that: The spraying mechanism (7) includes a liquid storage tank (71), which is arranged in a ring on the drug delivery head (3). The drug delivery head (3) is also provided with infusion holes (72) arranged in a ring. One end of the infusion hole (72) is connected to the transfer tank (31), and the other end is connected to the liquid storage tank (71). The liquid storage tank (71) is provided with outlet holes (73) arranged in an array.

10. A pediatric intestinal drug delivery device according to claim 1, characterized in that: The pressure regulating mechanism (8) includes an exhaust hood (81), which is fixedly connected to the drug delivery tube (2). One end of the exhaust hood (81) is connected to the annular groove (44). The exhaust hood (81) has exhaust holes (82) arranged in annular pattern at one end near the drug delivery tube (2). A piston plate (83) is slidably connected inside the exhaust hood (81). A spring (84) is fixedly connected to one side of the piston plate (83). A pressure plate (85) is fixedly connected to the other end of the spring (84). A guide rod (86) is fixedly connected to one side of the pressure plate (85). The other end of the guide rod (86) extends to the outside of the exhaust hood (81). A screw (87) is threadedly connected to the exhaust hood (81), and the lower end of the screw (87) is rotatably connected to the pressure plate (85).

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