Feeding system

Abstract

The utility model relates to the field of medical care, in particular to a feeding system which comprises a first feeding injector, a second feeding injector and a pipe assembly. The pipe assembly comprises a feeding connecting pipe and a flow limiting mechanism, and the flow limiting mechanism is used for limiting the flowing direction of liquid in the feeding connecting pipe; the first feeding injector and the second feeding injector are communicated through a feeding connecting pipe, and the feeding connecting pipe is provided with a feeding pipe connecting port. By the adoption of the feeding system, the feeding speed can be conveniently controlled, and nutrient solution does not need to be frequently supplemented.

Description

Technical Field

[0001] The utility model relates to the field of medical care, in particular to a feeding system. Background Art

[0002] Premature infants or infants with traditional feeding problems can be given enteral infusion of nutrient solution to help them take in the nutrients they need for growth. Enteral feeding is especially suitable for premature infants. Micro-feeding can be started soon after birth, which can significantly increase the baby's physical fitness, shorten the time required for intravenous nutrition, and quickly transition to nutrition through the digestive tract. Even newborns with mechanical ventilation can receive early micro-feeding.

[0003] Feeding with a feeding syringe is the most commonly used manual feeding method. Liquids such as nutrient solution or breast milk are loaded into the feeding syringe, and the liquid in the syringe is slowly injected into the stomach of the feeding object through the feeding connection tube connected to the syringe, thereby completing the feeding. During the feeding process, it is often necessary to adjust the feeding amount and feeding speed in time according to the on-site status of the feeding object.

[0004] There are two common ways to fill a feeding syringe with liquid. One is to pull the piston rod out of the syringe barrel to fill the nutrient solution. The other is to install a straw to draw the nutrient solution from other containers.

[0005] Common feeding syringes have capacities of 1mL, 3mL, 5mL, 10mL, 20mL, 30mL, 60mL, etc. Large-capacity feeding syringes require fewer refills, but are less easy to control the manual injection speed. Small-capacity feeding syringes are easier to achieve a slower and more uniform injection rate, but require more refills. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a feeding system which is convenient for controlling the feeding speed and does not need to frequently replenish the nutrient solution. In particular, the feeding system is particularly suitable for gastrointestinal feeding of infants and young children.

[0007] In order to solve the above technical problems, the utility model provides a feeding system, including a first feeding syringe, a second feeding syringe and a tube assembly;

[0008] The tube assembly includes a feeding connection tube and a flow limiting mechanism, wherein the flow limiting mechanism is used to limit the flow direction of the liquid in the feeding connection tube; the first feeding syringe and the second feeding syringe are connected through the feeding connection tube, and the feeding connection tube has a feeding tube connection port.

[0009] The feeding tube connection port is used to connect a gastrointestinal feeding tube to infuse nutrient solution or liquid medicine to the feeding object. Preferably, the feeding tube connection port is an ENFit connector. In the art, ENFit is a universal standard reverse Luer lock connector, which ensures that only gastrointestinal devices can be connected to each other, thereby reducing the risk of misconnection.

[0010] As an improvement of the above solution, the capacity of the first feeding syringe is greater than the capacity of the second feeding syringe;

[0011] The flow limiting mechanism is arranged on the feeding connecting tube, so as to enable the liquid in the first feeding syringe to be transferred into the second feeding syringe and to prevent the liquid from flowing back.

[0012] As an improvement of the above solution, the capacity of the first feeding syringe is at least twice the capacity of the second feeding syringe, such as 2 times, 3 times, 5 times, 10 times, 20 times or any range therebetween, such as 5-20 times.

[0013] As an improvement of the above solution, the feeding connection tube includes a first tube body, a second tube body and a third tube body which are interconnected, the first tube body is connected to the first feeding syringe, and the second tube body is connected to the second feeding syringe.

[0014] As an improvement of the above solution, the flow limiting mechanism can be used to allow or prevent the liquid from flowing in one direction or two directions between any two of the first tube body, the second tube body and the third tube body. For example, the flow limiting mechanism can be selected from a one-way valve, a connecting valve, a tube clamp, etc.

[0015] In some embodiments, the flow limiting mechanism is used to allow or prevent unidirectional or bidirectional flow of liquid in any one of the first tube body, the second tube body and the third tube body, or to control the connection state between any two of the first tube body, the second tube body and the third tube body.

[0016] As an improvement of the above solution, the current limiting mechanism includes a first current limiting mechanism and a second current limiting mechanism;

[0017] The first flow limiting mechanism is disposed on the first tube body so that the liquid can only pass through the first tube body in one direction, for example, it can only flow in a direction away from the first feeder;

[0018] The second flow limiting mechanism is arranged on the third tube body, so that the liquid can only pass through the third tube body in one direction, for example, it can only flow toward the feeding tube connection port.

[0019] Specifically, the first flow limiting mechanism or the second flow limiting mechanism may be a one-way valve.

[0020] As an improvement of the above solution, the flow limiting mechanism further includes a flow cut-off mechanism provided on the second tube body, and the flow cut-off mechanism is used to control the connection state of the second tube body.

[0021] For example, the shutoff mechanism may be a tube clamp. When the tube clamp is opened, the liquid can pass through the second tube body. When the tube clamp is closed, the liquid cannot pass through the second tube body.

[0022] As an improvement or adjustment of the above solution, the flow limiting mechanism may be a connecting valve; the connecting valve is connected to the first tube body, the second tube body and the third tube body. For example, the connecting valve is provided at the connecting position of the first tube body, the second tube body and the third tube body, and the connecting valve may at least connect any two of the first tube body, the second tube body and the third tube body. Specifically, the connecting valve may be, for example, a three-way valve.

[0023] As an improvement of the above solution, the first feeding syringe and the second feeding syringe each include an outer tube and a piston disposed in the outer tube, and the piston divides the inner cavity of the outer tube into a cavity and a liquid storage cavity;

[0024] The first tube body is communicated with the liquid storage cavity of the first feeding syringe, and the second tube body is communicated with the liquid storage cavity of the second feeding syringe.

[0025] As an improvement of the above solution, a push rod is provided in the outer tube, one end of the push rod is connected to the piston, and the other end extends out of the cavity. More preferably, a handle is provided at the other end of the push rod.

[0026] As an improvement of the above solution, the first tube body, the second tube body and the third tube body are an integrated structure.

[0027] The implementation of this utility model has the following beneficial effects:

[0028] The feeding system of the utility model is provided with two feeding syringes, and the two feeding syringes are connected through a feeding connecting tube, so that one feeding syringe can be supplemented with nutrient solution from another feeding syringe through the feeding connecting tube, thereby reducing the number of times of filling nutrient solution into the feeding syringe, avoiding frequent disassembly and filling of nutrient solution, improving feeding efficiency, and reducing labor intensity. At the same time, the setting of the flow limiting mechanism enables the nutrient solution in the feeding connecting tube to flow in a predetermined direction, avoiding backflow, ensuring the smooth progress of feeding injection, and facilitating the improvement of feeding efficiency. In addition, a feeding syringe with a smaller capacity can be used for feeding injection, which is convenient for controlling the manual feeding speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the first embodiment of the feeding system of the utility model;

[0030] Figure 2It is a structural schematic diagram of a second embodiment of the feeding system of the utility model;

[0031] Figure 3 is a structural schematic diagram of a second feeding syringe in a third embodiment of the feeding system of the utility model in a filling state;

[0032] Figure 4 It is a structural schematic diagram of the second feeding syringe of the third embodiment of the feeding system of the utility model in a liquid feeding state;

[0033] Figure 5 It is a structural schematic diagram of the first feeding syringe of the third embodiment of the feeding system of the utility model in the liquid feeding state. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail with reference to the accompanying drawings. It is hereby stated that the directional words such as up, down, left, right, front, back, inside, outside, etc. that appear or will appear in the text of the utility model are only based on the accompanying drawings of the utility model, and are not specific limitations of the utility model.

[0035] The feeding syringe described herein is a non-intravascular infusion device, which is used only in conjunction with a gastroesophageal tube or an intestinal nutrition tube to deliver nutrients to the patient's stomach. The gastroesophageal tube is, for example, a nasogastric tube or a gastric tube.

[0036] The liquid infused by the feeding syringe described herein may include nutrient solution, breast milk, formula milk solution, medical solution, etc., and in some cases, may also include clean water or flushing solution.

[0037] See also Figure 1-5 The utility model discloses a feeding system, comprising a first feeding syringe 1, a second feeding syringe 2 and a tube assembly.

[0038] The tube assembly includes a feeding connection tube and a flow limiting mechanism, wherein the flow limiting mechanism is used to limit the flow direction of the liquid in the feeding connection tube; the first feeding syringe 1 and the second feeding syringe 2 are connected through the feeding connection tube, and the feeding connection tube has a feeding tube connection port. The feeding tube connection port is used to connect to a gastrointestinal nutrition tube for feeding.

[0039] The feeding system of the utility model is provided with at least two feeding syringes, and the feeding syringes are connected through a feeding connecting tube, so that one feeding syringe can be supplemented with nutrient solution from another feeding syringe through the feeding connecting tube, thereby reducing the number of times the nutrient solution is filled into the feeding syringe, avoiding frequent disassembly of the syringe, improving feeding efficiency, and reducing labor intensity. At the same time, the setting of the flow limiting mechanism enables the nutrient solution in the feeding connecting tube to flow in a predetermined direction, avoiding backflow, ensuring the smooth progress of the feeding process, and facilitating the improvement of feeding efficiency and safety. In addition, a feeding syringe with a smaller capacity can be used for feeding injection, which is convenient for controlling the manual feeding speed.

[0040] Preferably, the capacity of the first feeding syringe 1 is greater than that of the second feeding syringe 2; the flow limiting mechanism is arranged on the feeding connecting tube so that the liquid in the first feeding syringe can enter the second feeding syringe and be output by the second feeding syringe.

[0041] The feeding system of the utility model is provided with at least two feeding syringes of different capacities. The large-capacity feeding syringe can replenish the nutrient solution to the small-capacity feeding syringe through the feeding connecting tube, avoiding the frequent disassembly of the feeding syringe to replenish the nutrient solution. This replenishment method is simpler, more convenient, faster, and saves time and effort. In addition, the feeding syringe with a smaller capacity can be used for injection feeding, which is convenient for controlling the feeding speed and easily achieving a slower and more uniform injection rate. The flow limiting mechanism of the feeding system of the utility model ensures that the liquid in the first feeding syringe can enter the second feeding syringe, while the liquid in the second feeding syringe cannot enter the first feeding syringe, thereby avoiding liquid backflow and ensuring the smooth progress of the feeding process.

[0042] More preferably, the capacity of the first feeding syringe 1 is at least twice the capacity of the second feeding syringe 2, such as 2 times, 3 times, 5 times, 10 times, 20 times or any range therebetween, such as 5-20 times, which can meet the feeding amount requirements without multiple refills of nutrient solution, thereby improving feeding efficiency.

[0043] Specifically, the feeding connection tube includes a first tube body 3, a second tube body 4 and a third tube body 5 which are interconnected, the first tube body 3 is connected to the first feeding syringe 1, and the second tube body 4 is connected to the second feeding syringe 2. That is to say, the first tube body 3 is connected to the second tube body 4 and the third tube body 5 respectively, the second tube body 4 is connected to the first tube body 3 and the third tube body 5 respectively, and the third tube body 5 is connected to the first tube body 3 and the second tube body 4 respectively. At the same time, the first tube body 3 is connected to the first feeding syringe 1, and the second tube body 4 is connected to the second feeding syringe 2. Therefore, the first feeding syringe and the second feeding syringe are connected through the first tube body and the second tube body, and are connected to the feeding tube connection port through the third tube body. Among them, the third tube body can be connected to the gastric tube of the feeding object, so that the first feeding syringe and the second feeding syringe can flow the nutrient solution into the stomach of the feeding object through the third tube body to realize feeding injection. Preferably, the first tube body 3, the second tube body 4 and the third tube body 5 are an integrated structure, which is convenient for system assembly and simple and convenient operation.

[0044] The connection point where the first tube body 3 is connected to the first feeding syringe 1 is the first connection point A of the feeding connection tube; the connection point where the second tube body 4 is connected to the second feeding syringe 2 is the second connection point B of the feeding connection tube; the connection point where the first tube body 3, the second tube body 4 and the third tube body 5 are connected to each other is the third connection point C of the feeding connection tube; the third tube body 5 is provided with a feeding tube connection port D. The connection port D is used to communicate with the gastrointestinal tract of the feeding object.

[0045] The nutrient solution in the first feeding syringe is sucked into the second feeding syringe by the second feeding syringe. At this time, the nutrient solution in the first feeding syringe flows from the first connection point through the first tube body to the third connection point, and then flows from the third connection point through the second tube body to the second connection point, so as to achieve refilling or liquid supplementation of the second feeding syringe. Then, the nutrient solution in the second feeding syringe is pushed through the second feeding syringe, so that the nutrient solution flows from the second connection point through the second tube body to the third connection point, and then flows from the third connection point through the third tube body to the feeding tube connection port, so as to achieve feeding injection for the feeding object, which is convenient for controlling the feeding speed and does not need to frequently supplement the nutrient solution.

[0046] The flow limiting mechanism can be used to allow or prevent the liquid from flowing in one direction or two directions between any two of the first tube body, the second tube body and the third tube body. For example, the flow limiting mechanism can be selected from a one-way valve, a connecting valve, a tube clamp, etc.

[0047] Alternatively or additionally, the flow limiting mechanism can be used to allow or prevent unidirectional or bidirectional flow of liquid in any one of the first tube, the second tube and the third tube, or to control the communication state between any two of the first tube, the second tube and the third tube.

[0048] As a non-limiting description, three embodiments of the feeding system of the present invention are described below.

[0049] First embodiment

[0050] like Figure 1 As shown, the flow limiting mechanism includes a first flow limiting mechanism 6 and a second flow limiting mechanism 7; the first flow limiting mechanism 6 is arranged on the first tube body 3, so that the liquid in the first tube body 3 can only flow from the first connection point A to the third connection point C; the second flow limiting mechanism 7 is arranged on the third tube body 5, so that the liquid in the third tube body 5 can only flow from the third connection point C to the feeding tube connection port D.

[0051] The first flow limiting mechanism is provided so that the nutrient solution of the first tube body can only flow from the first connection point to the third connection point, but cannot flow from the third connection point to the first connection point, thereby preventing the nutrient solution flowing out of the first feeding syringe from flowing back into the first feeding syringe or the nutrient solution at the third connection point from flowing toward the first connection point, thereby ensuring smooth feeding injection.

[0052] Preferably, the first flow limiting mechanism 6 and the second flow limiting mechanism 7 are both one-way valves.

[0053] Second embodiment

[0054] like Figure 2 As shown, the difference between the second embodiment and the first embodiment is that: on the basis of the first embodiment, the flow limiting mechanism further includes a flow interception mechanism provided on the second tube body 4, and the flow interception mechanism is used to control the connection state of the second tube body 4. By operating the interception mechanism, the second tube body can be connected or closed.

[0055] Preferably, the shut-off mechanism is a pipe clamp 8 .

[0056] When it is necessary to add liquid from the first feeding syringe to the second feeding syringe, the interception mechanism is in an open state, the second tube body is connected, and the liquid is sucked from the first feeder into the second feeder by pulling the second feeder.

[0057] When the first feeding syringe is used for feeding injection, the shut-off mechanism is in a closed state, the second tube body is not connected, and the nutrient solution flowing out of the first feeding syringe cannot flow into the second feeding syringe through the second tube body, but all flows to the third tube body, ensuring the feeding amount and feeding speed, thereby ensuring the smooth progress of the feeding injection.

[0058] Using the feeding system of the second embodiment, when it is possible or necessary to use the first feeding syringe for direct feeding, the nutrient solution can be output from the feeding tube connection port through the feeding connection tube without passing through the second feeding syringe.

[0059] like Figure 3-5 As shown, the flow limiting mechanism is a connecting valve, more specifically, the flow limiting mechanism is a three-way valve 9; the three-way valve 9 is arranged on the third connection point C and is connected to the first tube body 3, the second tube body 4 and the third tube body 5 respectively.

[0060] When the second feeding syringe 2 is in the filling state, Figure 3 As shown, the three-way valve 9 is adjusted to make the first tube body 3 and the second tube body 4 communicate, while the third tube body 5 is neither communicated with the first tube body 3 nor the second tube body 4. The second feeding syringe 2 is operated to draw, so that the nutrient solution in the first feeding syringe 1 flows through the first tube body 3 and the second tube body 4 in sequence and then flows into the second feeding syringe 2, so as to fill the second feeding syringe with nutrient solution. Alternatively, the first feeding syringe 1 can be used for push injection to fill the second feeding syringe with liquid.

[0061] When the second feeding syringe 2 is in the liquid feeding state, Figure 4 As shown, the three-way valve 9 is adjusted to make the second tube body 4 and the third tube body 5 communicate, while the first tube body 3 is neither communicated with the second tube body 4 nor the third tube body 5. The second feeding syringe 2 is operated to push the nutrient solution in the second feeding syringe 2 to flow through the second tube body 4 and the third tube body 5 in sequence and then be output, and finally reach the gastrointestinal tract of the feeding object, so as to achieve a slower and more uniform feeding injection speed.

[0062] In addition, since there is no one-way valve restriction, e.g. Figure 4 As shown, when the three-way valve connects the second tube body 4 and the third tube body 5, liquid can also be directly drawn into the second feeding syringe 2 through the feeding tube connection port D. This may be useful in some cases, for example, when medication needs to be administered through a feeding system.

[0063] When the first feeding syringe 1 is in the liquid feeding state, Figure 5 As shown, the three-way valve 9 is adjusted to make the first tube body 3 and the third tube body 5 connected, while the second tube body 4 is neither connected to the first tube body 3 nor to the third tube body 5. The first feeding syringe 1 is operated to push the nutrient solution in the first feeding syringe 1 to flow through the first tube body 3 and the third tube body 5 in sequence and then be output, and finally reach the gastrointestinal tract of the feeding object, so as to achieve a faster feeding injection speed.

[0064] In addition, since there is no one-way valve restriction, e.g. Figure 5 As shown, when the three-way valve connects the first tube body 3 and the third tube body 5, liquid can also be drawn into the first feeding syringe 1 through the feeding tube connection port D. This structure makes it more convenient to fill the first feeder 1 with liquid.

[0065] In addition, if Figure 1As shown, the first feeding syringe 1 and the second feeding syringe 2 have the same structure. The first feeding syringe 1 and the second feeding syringe 2 both include an outer barrel 10 and a piston 11 disposed in the outer barrel 10, wherein the piston 11 divides the inner cavity of the outer barrel 10 into a cavity 10a and a liquid storage cavity 10b; the first tube 3 is connected to the liquid storage cavity 10b of the first feeding syringe 1, and the second tube 4 is connected to the liquid storage cavity of the second feeding syringe 2. The piston 11 is sealedly connected to the outer barrel 10 to ensure that the nutrient solution is sucked into or pushed out of the liquid storage cavity when the piston is pushed or pulled, thereby effectively realizing the suction or injection of the nutrient solution by the feeding syringe.

[0066] Preferably, a push rod 12 is provided in the outer tube, one end of which is connected to the piston 11, and the other end of which extends out of the cavity 10a. The user can hold the other end of the push rod to push the piston, so that the piston moves back and forth in the outer tube, thereby changing the size of the cavity and the liquid storage cavity to achieve suction or injection of nutrient solution.

[0067] More preferably, the other end of the push rod 12 is provided with a handle 13. The user can push and pull the piston by operating the handle, making the operation easier.

[0068] In actual operation, the first feeding syringe 1 is first filled with the nutrient solution to be fed, and then the first tube body 3 and the first feeding syringe 1 are connected, and the remaining components are connected at once. Alternatively, without using a one-way valve, the feeding system of the utility model can be provided in a fully connected form, and the nutrient solution to be fed is filled into the first feeding syringe 1 through the feeding tube connection port. After the filling is completed, the feeding tube connection port D is connected to the gastrointestinal nutrition tube of the feeding object.

[0069] like Figure 1 As shown, using the first embodiment, the piston of the second feeding syringe 2 is pulled to move the piston toward the top of the outer tube, and the nutrient solution in the first feeding syringe 1 is sucked into the second feeding syringe 2, thereby filling the second feeding syringe 2 with nutrient solution. Then, the piston of the second feeding syringe 2 is pushed to move the piston toward the bottom of the outer tube, so that the nutrient solution in the second feeding syringe 2 enters the gastrointestinal nutrition tube from the feeding tube connection port through the second tube body 4 and the third tube body 5. When the nutrient solution in the second feeding syringe is insufficient, the piston of the second feeding syringe 2 is pulled to supplement or refill the liquid.

[0070] like Figure 2 As shown, in the second embodiment, when the tube clamp is in the open state, feeding is performed through the second feeding syringe, and the injection and filling operations are the same as those of the first embodiment. When the tube clamp is in the closed state, the second connection point B is not connected to the third connection point C, and direct feeding can be performed through the first feeding syringe.

[0071] In the third embodiment, the state of the three-way valve needs to be adjusted or confirmed before each operation step. Figure 3 As shown, to transfer the liquid in the first feeder into the second feeder, it is necessary to adjust or confirm that the three-way valve 9 only connects the first tube 3 and the second tube 4; Figure 4 As shown, when using the second feeding syringe for push feeding, it is necessary to adjust or confirm that the three-way valve 9 only connects the second tube body 4 and the third tube body 5; Figure 5 As shown, when the first feeding syringe is used for direct injection feeding, it is necessary to adjust or confirm that the three-way valve 9 only allows the first tube body 3 and the third tube body 5 to communicate.

[0072] In summary, the utility model provides a feeding system that is convenient for controlling the feeding speed and does not require frequent replenishment of nutrient solution.

[0073] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. A feeding system, characterized in that: including a first feeding syringe, a second feeding syringe, and a tube assembly; The tube assembly includes a feeding connection tube and a flow limiting mechanism, wherein the flow limiting mechanism is used to limit the flow direction of the liquid in the feeding connection tube; the first feeding syringe and the second feeding syringe are connected through the feeding connection tube, and the feeding connection tube has a feeding tube connection port.

2. The feeding system according to claim 1, characterized in that: the first feeding syringe having a capacity greater than the capacity of the second feeding syringe; The flow limiting mechanism is arranged on the feeding connecting tube, so as to enable the liquid in the first feeding syringe to flow into the second feeding syringe and to prevent the liquid from flowing back.

3. The feeding system according to claim 2, characterized in that: The capacity of the first feeding syringe is at least 2 times the capacity of the second feeding syringe.

4. The feeding system according to claim 2, characterized in that: The feeding connection tube comprises a first tube body, a second tube body and a third tube body which are interconnected. The first tube body is connected to a first feeding syringe, the second tube body is connected to a second feeding syringe, and the third tube body is provided with a feeding tube connection port.

5. The feeding system according to claim 2, characterized in that: The flow limiting mechanism is used to allow or prevent unidirectional or bidirectional flow of liquid in any one of the first tube body, the second tube body and the third tube body, or to control the communication state between any two of the first tube body, the second tube body and the third tube body.

6. The feeding system according to claim 5, characterized in that: The current limiting mechanism includes a first current limiting mechanism and a second current limiting mechanism; The first flow limiting mechanism is arranged on the first tube body so that the liquid in the first tube body can only flow in the direction away from the first feeder; The second flow limiting mechanism is arranged on the third tube body so that the liquid in the third tube body can only flow toward the feeding tube connection port.

7. The feeding system according to claim 6, characterized in that: The flow limiting mechanism also includes a flow cut-off mechanism arranged on the second tube body, and the flow cut-off mechanism is used to control the connection state of the second tube body.

8. The feeding system according to claim 5, characterized in that: The flow limiting mechanism is a connecting valve; the connecting valve is arranged at the connection position of the first tube body, the second tube body and the third tube body, and the connecting valve can at least connect any two of the first tube body, the second tube body and the third tube body.

9. The feeding system according to claim 5, characterized in that: The first feeding syringe and the second feeding syringe each include an outer barrel and a piston disposed in the outer barrel, wherein the piston divides the inner cavity of the outer barrel into a cavity and a liquid storage cavity; The first tube body is communicated with the liquid storage cavity of the first feeding syringe, and the second tube body is communicated with the liquid storage cavity of the second feeding syringe.

10. The feeding system according to claim 5, characterized in that: The first tube body, the second tube body and the third tube body are an integrated structure.

Images