A dual-lumen synchronous precision intravenous catheter sealing injection device

Abstract

This utility model relates to the technical field of medical devices and discloses a dual-lumen synchronous precision intravenous catheter sealing injection device, including a housing, a telescopic pump, and a microprocessor. Several fixed tubes are fixed to the side of the housing and evenly distributed along its length. Each fixed tube contains an injection tube coaxially arranged with an injection cavity. An injection port communicating with the injection cavity is provided on the fixed tube. A hydraulic sensor passing through the injection tube and used to monitor the medication in the injection cavity is provided on the fixed tube. An injection push rod reciprocates along its axial direction within the injection tube. An injection push plate is fixed to the end of the injection push rod facing the injection tube opening. All ends of the injection push rods away from the injection push plate are connected to a common pushing structure, which is driven and connected to the telescopic pump. The microprocessor is electrically connected to both the telescopic pump and the hydraulic sensor. In this utility model, the pressure in each injection tube is uniform, thereby avoiding poor blood flow or catheter blockage.

Description

Technical Field

[0001] This utility model relates to the technical field of medical devices, specifically to a dual-cavity synchronous precision intravenous sealing injection device. Background Technology

[0002] Double-lumen and multi-lumen catheters are commonly used in clinical practice for hemodialysis patients, critically ill patients in intensive care units, and patients who require repeated intravenous infusions of blood products while not being able to discontinue regular medications. The multi-lumen structure can ensure the opening of multiple venous channels, allowing medication to be injected into the vein. In both double-lumen and multi-lumen catheters, the parts outside the human body are independent, but they merge into one lumen after entering the human body.

[0003] Currently, according to the "Specifications for Intravenous Therapy Nursing Techniques" and the "Standards for Infusion Therapy Practice," if a patient has multiple indwelling catheters, even if only one lumen is used, each lumen must be flushed and sealed after use to prevent catheter blockage. For double-lumen or multi-lumen catheters, it is advisable to flush and seal multiple lumens simultaneously with one hand to prevent backflow in other lumens due to flushing only one side. Accordingly, performing pulsed flushing and positive pressure sealing after the infusion is completed can effectively prevent catheter blockage.

[0004] Among them, pulse flushing uses a "push-stop-push" method to flush the catheter. Compared with continuous injection flushing, pulse flushing can create small vortices in the catheter, which helps to flush away residual medication adhering to the catheter and blood vessel walls. At the same time, when sealing the catheter, when there is 0.5 to 1 mL of sealing fluid remaining, the catheter is sealed by continuously injecting and withdrawing the needle, i.e., positive pressure sealing. This can maintain positive pressure in the catheter and prevent blood backflow, thereby avoiding poor blood flow in the lumen or catheter blockage.

[0005] Therefore, when flushing and sealing multiple syringes in clinical practice, medical staff need to use the thenar eminence of their palm to complete the process manually. The entire process includes selecting the syringe, manually pulsating the syringe, manually achieving positive pressure sealing, and handling multi-lumen catheters. However, because the force is applied to the thenar eminence, the pressure in each syringe and lumen is not uniform, which can easily cause the medication to flow back into the lumen with relatively low pressure, thus affecting the flushing and sealing effect and posing a safety hazard. Utility Model Content

[0006] The present invention aims to provide a dual-lumen synchronous precision intravenous catheter sealing injection device. This device addresses the issue that when medical personnel perform multi-lumen flushing and sealing with one hand, the pressure in each syringe and lumen is uneven, which can easily lead to the backflow of medication into the lumen with relatively low pressure.

[0007] To achieve the above objectives, various aspects of this application may be implemented in one or more of the following embodiments:

[0008] 1) A dual-lumen synchronous precision intravenous catheter sealing injection device, comprising a housing, a telescopic pump, and a microprocessor. Several fixed tubes are fixed on the side of the housing and evenly distributed along its length. An injection tube is provided coaxially within the fixed tube. The injection tube has an injection cavity. An injection port communicating with the injection cavity is provided on the fixed tube. A hydraulic sensor passing through the injection tube and used to monitor the drug solution in the injection cavity is provided on the fixed tube. An injection push rod reciprocates along its axial direction within the injection tube. An injection push plate is fixed to the end of the injection push rod facing the injection tube opening. The ends of all injection push rods away from the injection push plate are connected to a common pushing structure. The pushing structure is driven and connected to the telescopic pump. The microprocessor is electrically connected to the telescopic pump and the hydraulic sensor respectively.

[0009] This invention uses a microprocessor to issue commands to start a telescopic pump. The telescopic pump's starting mechanism drives the injection plunger to move axially, causing the injection plate on the plunger to push the liquid medicine in the injection chamber axially toward the injection tube opening. During this process, a hydraulic sensor on each fixed tube monitors the hydraulic pressure value in its corresponding injection chamber. All hydraulic sensors send their hydraulic pressure values ​​to the microprocessor, which has preset hydraulic pressure values. The microprocessor compares all the obtained hydraulic pressure values ​​with the preset values. When all the hydraulic pressure values ​​are equal to the preset values, it is determined that the pressure in all injection tubes is uniform.

[0010] Meanwhile, compared with the prior art, all the injection tubes in this invention are in a separate state, thus avoiding the backflow of the drug solution into the relatively low-pressure cavity of the injection tube, thereby reducing safety hazards; and by using hydraulic sensors on all fixed tubes to monitor the hydraulic value in the injection cavity of their corresponding injection tube in real time, the amount of drug solution to be delivered is obtained through the hydraulic value, thereby achieving precise delivery of drug solution and sealing of the tube. During this process, the pressure in each injection tube is uniform, keeping the catheter under positive pressure and preventing blood backflow, thereby avoiding poor blood flow in the lumen or catheter blockage.

[0011] 2) A dual-lumen synchronous precision intravenous catheter sealing injection device according to 1), wherein:

[0012] The pushing structure includes a pushing plate disposed within the housing. The ends of all injection push rods away from the injection pushing plate extend through the injection tube toward the interior of the housing and are fixedly connected to the side of the pushing plate. A pushing rod is fixed to the side of the pushing plate away from the injection push rods. The pushing rod is located in the middle of the pushing plate. The end of the pushing rod away from the pushing plate is coaxially fixedly connected to the output shaft of the telescopic pump.

[0013] In use, this utility model drives the push rod to move along its axial direction through the output shaft of the telescopic pump. When the push rod moves along its axial direction, it drives the push plate fixed on the push rod to move synchronously along its axial direction. During the movement, the push plate drives all the injection push rods to move along the axial direction of their respective injection tubes, thereby realizing the synchronous driving of the drug liquid in all injection tubes for delivery.

[0014] Meanwhile, this invention replaces manual operation by medical staff. It uses a telescopic pump to drive the push plate to move axially, which in turn drives all the injection plungers to move axially. This allows all the injection plungers to perform flushing and sealing operations simultaneously, thereby reducing the occurrence of complications such as catheter blockage and thrombotic blockage. This ensures patient safety, reduces unplanned medical expenses, and minimizes patient suffering.

[0015] 3) A dual-lumen synchronous precision intravenous catheter sealing injection device according to 2), wherein:

[0016] Several guide rods are fixed to the side of the push plate. The positions of the guide rods correspond one-to-one with the positions of the push rods. All guide rods are located on the same side as the output shaft of the telescopic pump and are arranged around the periphery of the output shaft of the telescopic pump. The ends of the guide rods away from the push plate are slidably connected to the housing.

[0017] The several guide rods designed in this utility model are used to support and guide the push plate. They provide support and guidance at the fixed connection point between the push plate and the push rod, ensuring that all force points at the fixed connection point are the same. This helps the push plate to drive all injection push rods with the same force, thereby achieving the same hydraulic value monitored in each injection tube and uniform pressure in each injection tube. This maintains positive pressure in the catheter, preventing blood backflow and avoiding poor blood flow or catheter blockage.

[0018] 4) A dual-lumen synchronous precision intravenous catheter sealing injection device according to 3), wherein:

[0019] Several limiting tubes are fixed inside the housing. The position of each limiting tube corresponds one-to-one with the position of the guide rod. One end of the limiting tube is fixed to the inner wall of the housing, and the other end of the limiting tube is through which the end of the guide rod passes and moves back and forth along the axial direction of the limiting tube.

[0020] The limiting tube designed in this utility model is used to limit the guide rod. At the same time, the position of the limiting tube is fixed in the shell, thereby restricting the position of the guide rod. This allows the guide rod to move back and forth along the axial direction of the limiting tube, which also limits the position of the push plate. By keeping the push plate moving back and forth in the directional direction, the pressure in each injection tube can be uniform, maintaining positive pressure in the catheter and preventing blood backflow, thereby avoiding poor blood flow in the lumen or catheter blockage.

[0021] 5) A dual-lumen synchronous precision intravenous catheter sealing injection device according to 1), wherein:

[0022] A guide tube is fixed to the side of the housing and is arranged on the same side as the injection tube. The guide tube has a limiting chamber that communicates with the internal space of the housing. A guide rod is slidably connected in the limiting chamber. The end of the guide rod away from the limiting chamber is connected to the pushing structure.

[0023] The guide tube and guide rod designed in this utility model guide the orientation of the pushing structure. The guide tube is set on the same side as the injection tube. When the injection push rod moves along its axial direction in the injection tube, the guide rod also moves synchronously along the axial direction of the guide tube. The axial distance of the guide rod in the limiting cavity of the guide tube is the same as the distance of the injection push rod. When the guide rod moves to the end of the guide tube, the guide rod stops moving, so that the injection push rod also stops synchronously. This can ensure the quantitative delivery of the drug liquid pushed by the injection push rod.

[0024] 6) A dual-lumen synchronous precision intravenous catheter sealing injection device according to 5), wherein:

[0025] The position of the guide tube corresponds to the position of the output shaft of the telescopic pump, and all injection tubes are wound around the periphery of the guide tube.

[0026] The position of the telescopic pump output shaft of this utility model corresponds to the position of the guide cylinder, so that when the telescopic pump output shaft drives the push structure to move, the guide rod can accurately enter the guide cylinder and reciprocate along the axial direction of the guide cylinder; at the same time, all injection tubes are wrapped around the periphery of the guide cylinder, thus ensuring that the pushing force of the telescopic pump output shaft is evenly distributed at the position of each injection tube, maintaining the pushing stability of the telescopic pump.

[0027] 7) A dual-lumen synchronous precision intravenous catheter sealing injection device according to 6), wherein:

[0028] A pressure sensor is installed at the bottom of the guide tube, and the end face of the pressure sensor can abut against the end face of the guide rod. The pressure sensor is electrically connected to the microprocessor.

[0029] When the guide rod of this utility model moves, when the end of the guide rod abuts against the bottom of the guide cylinder and touches the pressure sensor, the pressure sensor transmits its pressure value to the microprocessor. After receiving the pressure value, the microprocessor sends a command to the telescopic pump, at which point the telescopic pump stops running, thus automatically stopping the delivery of the medicine without the need for medical staff to operate, making it more convenient.

[0030] 8) A dual-lumen synchronous precision intravenous catheter sealing injection device according to 7), wherein:

[0031] The guide tube has inclined grooves on both sides of its opening. The inclined grooves are inclined towards the bottom of the pressure sensor and are vertically arranged away from the sidewall of the pressure sensor. The guide rod has inclined spring plates on both sides of its end face, and the spring plates are inclined to fit the bottom of the inclined groove.

[0032] In this invention, during the reciprocating movement of the guide rod within the guide cylinder along its axial direction, to prevent the guide rod from detaching from the guide cylinder, spring plates are installed on both sides of the end of the guide rod. When the guide rod gradually moves away from the bottom of the guide cylinder and approaches the opening, the inclined grooves on both sides of the opening of the guide cylinder are not compressed. Due to the elastic potential energy of the spring plates themselves, they are ejected and stuck in the inclined grooves, thereby limiting the end of the guide rod and preventing it from detaching from the guide cylinder.

[0033] When the guide rod moves towards the bottom of the guide cylinder along the axial direction, the spring plate engages with the bottom of the inclined groove, forcing the spring plate to be squeezed and move along the inner wall of the guide cylinder towards the bottom of the guide cylinder, thereby realizing the reciprocating movement of the guide rod along the axial direction of the guide cylinder.

[0034] 9) A dual-lumen synchronous precision intravenous catheter sealing injection device according to 1), wherein:

[0035] The telescopic pump has a base on its end face away from its output shaft, and the base is fixed in the internal space of the housing by bolts and nuts.

[0036] The base of this utility model is designed to fix the telescopic pump in the internal space of the housing, thereby maintaining the stability of the telescopic pump's operation.

[0037] 10) A dual-lumen synchronous precision intravenous catheter sealing injection device according to 1), wherein:

[0038] Each syringe end away from the injection plunger is connected to an injection head, which is connected to the catheter. The injection head is designed to facilitate the introduction of the medication from the syringe into the catheter.

[0039] Compared with the prior art, the technical principles and technical effects of this utility model are as follows:

[0040] This invention employs a microprocessor to control the opening and closing of the telescopic pump, while simultaneously monitoring the hydraulic pressure in each injection tube in real time via a hydraulic sensor. This allows for precise control of the amount of medication delivered to the catheter, enabling simultaneous flushing and sealing of multiple injection tubes and preventing complications such as thrombotic blockage. This ensures patient safety, reduces unplanned medical expenses, and minimizes patient suffering. The push plate, along with the guide rod, injection plunger, and guide rod designed on the push plate, works in conjunction to maintain equal pressure in the injection chambers of each injection tube, ensuring medication is delivered into the catheter at the same speed. Furthermore, the separate design of each injection tube in this invention prevents medication from flowing back into the lower-pressure lumens, a problem common in existing technologies.

[0041] Meanwhile, this utility model utilizes a pressure sensor to automatically control the shut-off of the telescopic pump, thereby saving the operation time of medical staff. It also uses the electric control of the telescopic pump to simultaneously perform flushing and sealing of the tubes without the need for medical staff to operate, thus reducing the labor intensity of medical staff and protecting their own health while saving manpower. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the structure of a dual-lumen synchronous precision intravenous sealing injection device according to the present invention;

[0043] Figure 2 for Figure 1 Sectional view of AA;

[0044] Figure 3 for Figure 2 Enlarged view of section B1 in the middle. Detailed Implementation

[0045] The following detailed description illustrates the specific implementation method:

[0046] The reference numerals in the accompanying drawings include: housing 1, fixing tube 2, guide tube 3, injection tube 4, injection head 5, injection port 6, base 7, telescopic pump 8, limiting tube 9, guide rod 10, push rod 11, push plate 12, guide rod 13, injection push rod 14, injection push plate 15, hydraulic sensor 16, pressure sensor 17, inclined groove 18, and spring plate 19.

[0047] Reference will now be made in detail to the embodiments disclosed herein, examples of which are described herein and illustrated in the accompanying drawings. While this disclosure will be described in conjunction with embodiments and / or examples, they are not intended to limit the disclosure to those embodiments and / or examples. Rather, this disclosure covers alternatives, modifications, and equivalents.

[0048] In example Figure 1 and Figure 2In the generally illustrated embodiment, a dual-lumen synchronous precision intravenous catheter sealing injection device includes a housing 1, a telescopic pump 8, and a microprocessor. Several fixed tubes 2 are fixed on the side of the housing 1 and are evenly distributed along its length. An injection tube 4 is provided coaxially within the fixed tube 2. The injection tube 4 has an injection cavity. An injection port 6 communicating with the injection cavity is provided on the fixed tube 2. A hydraulic sensor 16 passing through the injection tube 4 and used to monitor the drug solution in the injection cavity is provided on the fixed tube 2. An injection push rod 14 reciprocates along its axial direction within the injection tube 4. An injection push plate 15 is fixed to the end of the injection push rod 14 facing the injection tube 4. The ends of all injection push rods 14 away from the injection push plate 15 are connected to a common pushing structure. The pushing structure is driven and connected to the telescopic pump 8. The microprocessor is electrically connected to the telescopic pump 8 and the hydraulic sensor 16 respectively.

[0049] The telescopic pump 8 has a base 7 on its end face away from its output shaft. The base 7 is fixed to the internal space of the housing 1 by bolts and nuts. The base 7 is designed to fix the telescopic pump 8 in the internal space of the housing 1 and maintain the stability of the telescopic pump 8 during operation.

[0050] Each injection tube 4 has an injection head 5 connected to its end furthest from the injection plunger 14. The injection head 5 is connected to the catheter. The injection head 5 is designed to facilitate the introduction of the drug solution in the injection tube 4 into the catheter.

[0051] The microprocessor issues a command to start the telescopic pump 8. The telescopic pump 8 activates the push structure, which moves the injection push rod 14 along its axial direction. This causes the injection push plate 15 on the injection push rod 14 to push the liquid medicine in the injection cavity along the axial direction towards the inlet of the injection tube 4. During this process, the hydraulic sensor 16 on each fixed tube 2 monitors the hydraulic value in its corresponding injection cavity. All hydraulic sensors 16 send the hydraulic values ​​to the microprocessor. The microprocessor has preset hydraulic values. It compares all the obtained hydraulic values ​​with the preset hydraulic values. When all the hydraulic values ​​are equal to the preset hydraulic values, it is determined that the pressure in all injection tubes 4 is uniform.

[0052] Meanwhile, compared with the prior art, all the injection tubes 4 in this embodiment are in a separate state. Therefore, it is possible to avoid the backflow of the drug solution into the relatively low pressure cavity of the injection tube 4, thereby reducing safety hazards. Furthermore, the hydraulic sensors 16 on all the fixed tubes 2 monitor the hydraulic value in the injection cavity of their corresponding injection tube 4 in real time. The amount of drug solution to be delivered is obtained through the hydraulic value, thereby achieving precise delivery of the drug solution and sealing the tube. During this process, the pressure in each injection tube 4 is uniform, keeping the catheter under positive pressure and preventing blood backflow, thereby avoiding poor blood flow in the lumen or catheter blockage.

[0053] The push structure is more detailed as follows: the push structure includes a push plate 12 disposed inside the housing 1. The ends of all injection push rods 14 away from the injection push plate 15 extend through the injection tube 4 toward the inside of the housing 1 and are fixedly connected to the side of the push plate 12. A push rod 11 is fixedly attached to the side of the push plate 12 away from the injection push rods 14. The push rod 11 is located in the middle of the push plate 12. The end of the push rod 11 away from the push plate 12 is coaxially fixedly connected to the output shaft of the telescopic pump 8.

[0054] In use, the output shaft of the telescopic pump 8 drives the push rod 11 to move along its axial direction. When the push rod 11 moves along its axial direction, it drives the push plate 12 fixed on the push rod 11 to move synchronously along the axial direction. During the movement, the push plate 12 drives all the injection push rods 14 to move along the axial direction of their respective injection tubes 4, so as to realize the synchronous driving of the drug liquid in all injection tubes 4 to be delivered.

[0055] Meanwhile, this embodiment replaces manual operation by medical staff. The telescopic pump 8 drives the push plate 12 to move in the axial direction, which in turn drives all the injection plungers 14 to move in the axial direction. This allows all the injection plungers 14 to perform flushing and sealing operations simultaneously, thereby reducing the occurrence of complications such as catheter drug blockage and thrombotic blockage, thus ensuring patient safety, reducing unplanned medical expenses, and reducing patient suffering.

[0056] Several guide rods 10 are fixed on the side of the push plate 12. The positions of the guide rods 10 correspond one-to-one with the positions of the push rods 11. All guide rods 10 are located on the same side as the output shaft of the telescopic pump 8. All guide rods 10 are arranged around the periphery of the output shaft of the telescopic pump 8. The ends of the guide rods 10 away from the push plate 12 are slidably connected to the housing 1.

[0057] The designed guide rods 10 are used to support and guide the push plate 12. They provide support and guidance at the fixed connection between the push plate 12 and the push rod 11, ensuring that all force points at the fixed connection between the push plate 12 and the push rod 11 are the same. This helps the push plate 12 to drive all the injection push rods 14 with the same pushing force, thereby achieving the same hydraulic value monitored in each injection tube 4 and uniform pressure in each injection tube 4. This keeps the catheter under positive pressure, preventing blood backflow and avoiding poor blood flow or catheter blockage.

[0058] Meanwhile, several limiting tubes 9 are fixed inside the housing 1. The position of each limiting tube 9 corresponds one-to-one with the position of the guide rod 10. One end of the limiting tube 9 is fixed to the inner wall of the housing 1, and the other end of the limiting tube 9 is for the end of the guide rod 10 to pass through and reciprocate along the axial direction of the limiting tube 9.

[0059] The limiting tube 9 is designed to limit the guide rod 10. At the same time, the position of the limiting tube 9 is fixed inside the housing 1, thereby limiting the position of the guide rod 10. This allows the guide rod 10 to move back and forth along the axial direction of the limiting tube 9, which also limits the position of the push plate 12. By keeping the push plate 12 moving back and forth in the directional direction, the pressure in each injection tube 4 can be uniform, maintaining positive pressure in the catheter and preventing blood backflow, thus avoiding poor blood flow in the lumen or catheter blockage.

[0060] See Figure 2 As shown, a guide tube 3 is fixed on the side of the housing 1, which is on the same side as the injection tube 4. The guide tube 3 has a limiting chamber that communicates with the internal space of the housing 1. A guide rod 13 is slidably connected in the limiting chamber. The end of the guide rod 13 away from the limiting chamber is connected to the push plate 12 in the push structure.

[0061] The designed guide tube 3, together with the guide rod 13, guides the direction of the push plate 12 of the push structure. The guide tube 3 is set on the same side as the injection tube 4. When the injection push rod 14 moves along its axial direction in the injection tube 4, the guide rod 13 also moves synchronously along the axial direction of the guide tube 3. The axial movement distance of the guide rod 13 in the limiting chamber of the guide tube 3 is the same as the movement distance of the injection push rod 14. When the guide rod 13 moves to the end of the guide tube 3, the guide rod 13 stops moving, so that the injection push rod 14 also stops synchronously. This can ensure the quantitative delivery of the drug liquid pushed by the injection push rod 14.

[0062] Meanwhile, at the position of the guide cylinder 3 corresponding to the position of the output shaft of the telescopic pump 8, all injection tubes 4 are wound around the periphery of the guide cylinder 3. This ensures that when the output shaft of the telescopic pump 8 drives the push structure to move, the guide rod 13 can accurately enter the guide cylinder 3 and reciprocate along the axial direction of the guide cylinder 3. At the same time, by winding all the injection tubes 4 around the periphery of the guide cylinder 3, the pushing force of the output shaft of the telescopic pump 8 is evenly distributed at the position of each injection tube 4, maintaining the pushing stability of the telescopic pump 8.

[0063] In addition, a pressure sensor 17 is installed at the bottom of the guide cylinder 3. The end face of the pressure sensor 17 can abut against the end face of the guide rod 13. The pressure sensor 17 is electrically connected to the microprocessor.

[0064] When the guide rod 13 moves, when the end of the guide rod 13 abuts against the bottom of the guide cylinder 3 and touches the pressure sensor 17, the pressure sensor 17 transmits its pressure value to the microprocessor. After receiving the pressure value, the microprocessor sends a command to the telescopic pump 8, at which point the telescopic pump 8 stops running, thus automatically stopping the delivery of the medicine without the need for medical staff to operate, which is more convenient.

[0065] See Figure 3As shown, inclined grooves 18 are respectively opened on both sides of the opening of the guide cylinder 3. The inclined grooves 18 are inclined towards the bottom of the pressure sensor 17. The side wall of the inclined grooves 18 away from the pressure sensor 17 is vertical. The end face of the guide rod 13 has inclined spring plates 19 on both sides. The spring plates 19 are inclined to the bottom of the inclined grooves 18.

[0066] During the reciprocating movement of the guide rod 13 within the guide cylinder 3 along its axial direction, in order to prevent the guide rod 13 from detaching from the guide cylinder 3, spring plates 19 are installed on both sides of the end of the guide rod 13. When the guide rod 13 gradually moves away from the bottom of the guide cylinder 3 and approaches the opening, the inclined grooves 18 on both sides of the opening of the guide cylinder 3 are not squeezed. Due to the elastic potential energy of the spring plates 19, they are ejected and stuck in the inclined grooves 18, thereby limiting the end of the guide rod 13 and preventing the guide rod 13 from detaching from the guide cylinder 3.

[0067] When the guide rod 13 moves toward the bottom of the guide cylinder 3 along the axial direction, the spring plate 19 engages with the bottom of the inclined groove 18, forcing the spring plate 19 to be squeezed and move toward the bottom of the guide cylinder 3 along the inner wall of the guide cylinder 3, thereby realizing the reciprocating movement of the guide rod 13 along the axial direction of the guide cylinder 3.

[0068] The microprocessor controls the opening and closing of the telescopic pump 8, while the hydraulic sensor 16 monitors the hydraulic pressure in each injection tube 4 in real time, precisely controlling the amount of medication entering the catheter. This enables simultaneous flushing and sealing of multiple injection tubes 4, preventing complications such as thrombotic blockage, thus ensuring patient safety, reducing unplanned medical expenses, and minimizing patient suffering. The push plate 12, along with the guide rod 13, injection push rod 14, and guide rod 10 designed on the push plate 12, work together to maintain equal pressure in the injection chambers of each injection tube 4, ensuring medication is delivered into the catheter at the same speed. Furthermore, since each injection tube 4 is designed separately in this embodiment, the backflow of medication into the relatively low-pressure lumen, as is common in existing technologies, can be avoided.

[0069] Meanwhile, this embodiment utilizes pressure sensor 17 to automatically control the shut-off of telescopic pump 8, thereby saving operation time for medical staff. The electric control of telescopic pump 8 synchronously performs flushing and sealing of the tubes, eliminating the need for manual operation by medical staff and reducing their workload, while also protecting their health. The above are merely embodiments of this utility model; well-known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A double lumen synchronized precision intravenous catheter maintenance injection device, characterized in that, The device includes a housing, a telescopic pump, and a microprocessor. Several fixed tubes are fixed on the side of the housing and evenly distributed along its length. An injection tube is coaxially arranged inside the fixed tube and has an injection cavity. An injection port communicating with the injection cavity is provided on the fixed tube. A hydraulic sensor passing through the injection tube and used to monitor the drug solution in the injection cavity is provided on the fixed tube. An injection push rod that reciprocates along its axial direction is provided inside the injection tube. An injection push plate is fixed to the end of the injection push rod facing the injection tube opening. The ends of all injection push rods away from the injection push plate are connected to a common pushing structure. The pushing structure is driven and connected to the telescopic pump. The microprocessor is electrically connected to the telescopic pump and the hydraulic sensor respectively.

2. The dual-lumen synchronous precision intravenous catheter sealing injection device according to claim 1, characterized in that: The pushing structure includes a pushing plate disposed within the housing. The ends of all injection push rods away from the injection pushing plate extend through the injection tube toward the interior of the housing and are fixedly connected to the side of the pushing plate. A pushing rod is fixed to the side of the pushing plate away from the injection push rods. The pushing rod is located in the middle of the pushing plate. The end of the pushing rod away from the pushing plate is coaxially fixedly connected to the output shaft of the telescopic pump.

3. The dual-lumen synchronous precision intravenous catheter sealing injection device according to claim 2, characterized in that: Several guide rods are fixed to the side of the push plate. The positions of the guide rods correspond one-to-one with the positions of the push rods. All guide rods are located on the same side as the output shaft of the telescopic pump and are arranged around the periphery of the output shaft of the telescopic pump. The ends of the guide rods away from the push plate are slidably connected to the housing.

4. The dual-lumen synchronous precision intravenous catheter sealing injection device according to claim 3, characterized in that: Several limiting tubes are fixed inside the housing. The position of each limiting tube corresponds one-to-one with the position of the guide rod. One end of the limiting tube is fixed to the inner wall of the housing, and the other end of the limiting tube is through which the end of the guide rod passes and moves back and forth along the axial direction of the limiting tube.

5. The dual-lumen synchronous precision intravenous catheter sealing injection device according to claim 1, characterized in that: A guide tube is fixed to the side of the housing and is arranged on the same side as the injection tube. The guide tube has a limiting chamber that communicates with the internal space of the housing. A guide rod is slidably connected in the limiting chamber. The end of the guide rod away from the limiting chamber is connected to the pushing structure.

6. The dual-lumen synchronous precision intravenous catheter sealing injection device according to claim 5, characterized in that: The position of the guide tube corresponds to the position of the output shaft of the telescopic pump, and all injection tubes are wound around the periphery of the guide tube.

7. The dual-lumen synchronous precision intravenous catheter sealing injection device according to claim 6, characterized in that: A pressure sensor is installed at the bottom of the guide tube, and the end face of the pressure sensor can abut against the end face of the guide rod. The pressure sensor is electrically connected to the microprocessor.

8. The dual-lumen synchronous precision intravenous catheter sealing injection device according to claim 7, characterized in that: The guide tube has inclined grooves on both sides of its opening. The inclined grooves are inclined towards the bottom of the pressure sensor and are vertically arranged away from the sidewall of the pressure sensor. The guide rod has inclined spring plates on both sides of its end face, and the spring plates are inclined to fit the bottom of the inclined groove.

9. The dual-lumen synchronous precision intravenous catheter sealing injection device according to claim 1, characterized in that: The telescopic pump has a base on its end face away from its output shaft, and the base is fixed in the internal space of the housing by bolts and nuts.

10. The dual-lumen synchronous precision intravenous catheter sealing injection device according to claim 1, characterized in that: Each injection tube has an injection head connected to the end furthest from the injection plunger, and the injection head is connected to the catheter.

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