A pulsating cleaning device for sealing tube of injection pump

Abstract

The present invention relates to a push-injection pump sealed tube pulsating cleaning device connected to a vascular access device, wherein the vascular access device includes a push-injection device, an infusion tube, and a syringe. The push-injection pump sealed tube pulsating cleaning device includes at least four flushing liquid pipelines and a central valve, wherein two of the flushing liquid pipelines serve as flushing pipes, a flushing pressure sensor is provided at the end of one of the flushing liquid pipelines, and one of the flushing liquid pipelines serves as a return water pipe. The central valve includes a flushing pipe connection portion, a push-injection connection portion, and an infusion connection portion connected in sequence from top to bottom, and an automatic tube clamp is provided on the infusion tube. The present invention uses two-way cleaning water pumps to pulsatingly pump a cleaning flow into the infusion tube, thereby improving the flushing effect and having a good cleaning effect on thicker injection drugs. At the same time, through the cooperation of empty liquid detection, the automatic tube clamp, the pressure sensor, and the return water check valve of the return water pipe, the transient pressure caused by starting the cleaning water pump on the pipeline is prevented from damaging the pipeline.

Description

Technical Field

[0001] The invention belongs to the technical field of infusion pumps, and in particular relates to a pulsating cleaning device for sealing tubes of push pumps. Background Art

[0002] Intravenous therapy is one of the most commonly used basic treatment methods in clinical practice. It is almost prevalent in all internal medicine, surgery, gynecology, pediatrics, and critical care departments in medical institutions of all levels and types. Studies have shown that as many as 85% of hospitalized patients currently need the help of vascular access devices to deliver essential fluids, medications, nutrients, blood products, or to facilitate blood sampling.

[0003] With the exception of disposable needles, all vascular access devices must be properly flushed and sealed before and after medication administration and during routine maintenance. Flushing refers to flushing the infusion catheter and related connecting devices with normal saline, especially after the end of a single medication treatment to ensure no residual medication. Sealing refers to injecting a sealing solution into the infusion catheter and the entire set of connecting devices that need to be retained to prevent blood from flowing back into the blood vessels and clogging the catheter, and also to prevent external sources of infection from entering the body. Heparin solutions of varying concentrations and preservative-free normal saline can generally be used as sealing solutions for central venous access.

[0004] Currently, all vascular access devices used for intravenous therapy use a method of flushing and sealing separately, including central venous catheters used by hemodialysis patients. The flushing operation is first completed with a flushing solution, and then the sealing operation is completed with a sealing solution. The current problems with this operation are: 1) There is controversy over whether the catheter and its connecting device ports need to be disinfected between the two operations; 2) Frequent replacement of syringes, disconnection and exposure of ports are very detrimental to the prevention of catheter-related bloodstream infections; 3) The operation process is too cumbersome and complicated, affecting the degree and quality of completion of aseptic operation; 4) Complex operations will also It affects the operators' compliance with standardized operations, especially in departments such as the emergency room and intensive care unit where the nursing workload is heavy, and these departments are also the places where various types of catheters appear most frequently and are used most widely; 5) The current operation process increases the workload, especially when a multi-channel pump is required for single or multiple mixed injections. The flushing and sealing operations further increase the workload of nurses, thereby affecting the quality of care; 6) The conventional flushing solution is injected into the catheter at a uniform speed. For some viscous or easily adhered liquids, it cannot be guaranteed to be completely flushed out. Some require the replacement of the infusion line before continuing the subsequent infusion. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a push pump sealing tube pulsating cleaning device to realize the automation of flushing and sealing of single-tube injection or multi-tube mixed injection liquid pumps, improve the flushing effect, and reduce the workload of medical staff.

[0006] The technical solution adopted by the present invention to solve its technical problems is: to provide a push-injection pump sealing tube pulsating cleaning device connected to a vascular access device, wherein the vascular access device includes a push-injection device, an infusion tube and a syringe, and the push-injection pump sealing tube pulsating cleaning device includes at least four flushing liquid pipelines and a central valve, wherein two of the flushing liquid pipelines are used as flushing pipes, a flushing pressure sensor is provided at the end of one of the flushing liquid pipelines, and one of the flushing liquid pipelines is used as a return pipe, and a return water check valve is provided on the return pipe. The central valve includes a flushing pipe connecting part, a push-injection connecting part connected in sequence from top to bottom and an infusion connection part, a valve core is provided in the central valve, the flushing tube connection part is communicated with the flushing tube liquid pipeline, the push injection connection part is communicated with the syringe, and the infusion connection part is communicated with the infusion tube, a main passage connecting the flushing tube connection part with the push injection connection part and the infusion connection part is provided in the valve core, a flushing one-way valve is provided in the main passage at a position between the flushing tube connection part and the push injection connection part, an automatic tube clamp is provided on the infusion tube, and the automatic tube clamp is electrically controlled by a light-sensing empty-liquid detection device provided between the automatic tube clamp and the central valve.

[0007] Preferably, the flushing pipe connecting portion includes a plurality of flushing pipe through holes arranged around the upper portion of the central valve, and one end of the flushing liquid pipeline is connected to the flushing pipe through holes in a one-to-one correspondence.

[0008] Preferably, a cleaning water pump is provided on the flushing pipe, and the cleaning water pump is electrically controlled to open and close by a light-sensing empty liquid detection device provided between the cleaning water pump and the flushing liquid source.

[0009] Preferably, the push injection connection portion includes a push injection through hole provided on a central circumference of the central valve, and the push injection through hole is communicated with the output end of the syringe.

[0010] Preferably, the infusion connection portion includes an infusion through-hole provided at the bottom of the central valve, the infusion through-hole is connected to the infusion tube, and an injection needle is provided at the end of the infusion tube.

[0011] Preferably, the infusion connection portion is provided with a liquid outlet pressure sensor for detecting the liquid outlet pressure of the infusion tube.

[0012] Preferably, the push injection device comprises a housing, a propulsion driver and a push block. The push block is driven by the propulsion driver to be retractable along the length direction of the syringe, and the rear end of the push rod of the syringe rests on the push block.

[0013] Preferably, there are at least two sets of push injection devices, which are arranged with the central valve as the center. The output end of the syringe is directly connected to the push injection connection part. The valve core can rotate around the axis of the main passage through the control of a rotating motor. The side wall of the valve core is provided with a branch passage connected to the main passage. According to the rotation position of the valve core, the branch passage connects the valve core with different syringes.

[0014] Preferably, the number of the push injection devices is one set, and a syringe switching device is provided at the front end of the push injection device. A plurality of syringes are provided on the syringe switching device. The syringe switching device can transport the syringes to a specified position, and the specified position refers to the position where the tail end of the push rod of the syringe is aligned with the push block and the head end of the syringe is communicated with the push injection connection part.

[0015] The present invention utilizes two cleaning water pumps to pulse a cleaning flow into the infusion tubing, improving flushing efficiency and effectively cleaning thicker injectable medications. Furthermore, the integration of an empty liquid detector, an automatic tubing clamp, a pressure sensor, and a return water check valve in the return pipe prevents damage to the tubing caused by transient pressure from activating the cleaning water pumps. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional diagram of a push pump sealed tube pulsation cleaning device.

[0017] Figure 2 A stereoscopic view of a first embodiment of an infusion pump sealed tube pulsating cleaning device equipped with a vascular access device.

[0018] Figure 3 This is a stereoscopic diagram of a second embodiment of an infusion pump sealed tube pulsating cleaning device equipped with a vascular access device.

[0019] Figure 4 for Figure 1 Enlarged cross-sectional view of the middle valve core.

[0020] Figure 5 for Figure 2 Enlarged stereoscopic view of the middle push injection device.

[0021] Among them, 1-vascular access device; 2-injection device; 201-propelling driver; 202-pushing block; 203-fixer; 204-annular soft belt; 205-driving wheel; 206-driven wheel; 207-rotating driver; 3-infusion tube; 301-injection needle; 4-syringe; 401-syringe barrel; 402-push rod; 5-injection pump sealing tube pulsating cleaning device; 6-center valve; 601-flushing tube connection part; 60 2-injection connection; 603-infusion connection; 604-liquid outlet pressure sensor; 7-valve core; 701-main passage; 702-branch passage; 703-flushing check valve; 704-rotating motor; 8-flushing liquid pipeline; 801-flushing pipe; 802-return pipe; 803-flushing pressure sensor; 804-return check valve; 9-optical air-liquid detection device; 10-flushing water pump; 11-automatic tube clamp.

[0022] The same reference numerals in the various drawings represent the same components. DETAILED DESCRIPTION

[0023] Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiments are only used to illustrate the present invention and are not used in limiting the scope of the present invention.In addition, should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall equally within the scope limited by the appended claims of the application.

[0024] like Figure 1 As shown, the present invention provides a push pump sealing tube pulsating cleaning device, which is connected to a vascular access device 1, wherein the vascular access device 1 includes a push injection device 2, an infusion tube 3 and a syringe 4, and the push injection pump sealing tube pulsating cleaning device includes at least four flushing liquid pipelines 8 and a central valve 6, wherein two of the flushing liquid pipelines 8 serve as flushing pipes 801, a flushing pressure sensor 803 is provided at the end of one of the flushing liquid pipelines 8, and one of the flushing liquid pipelines 8 serves as a return pipe 802, and a return water check valve 804 is provided on the return pipe 802, and the central valve 6 includes a flushing pipe connecting part 601, a push injection connecting part 602 and an infusion connecting part 603 connected in sequence from top to bottom, and the central valve 6 A valve core 7 is provided inside, the flushing tube connection part 601 is connected to the flushing liquid pipeline 8, the push injection connection part 602 is connected to the syringe 4, and the infusion connection part 603 is connected to the infusion tube 3. A main passage 701 is provided in the valve core 7 to connect the flushing tube connection part 601 with the push injection connection part 602 and the infusion connection part 603. A flushing one-way valve 703 is provided in the main passage 701 at a position between the flushing tube connection part 601 and the push injection connection part 602. An automatic tube clamp 11 is provided on the infusion tube 3, and the automatic tube clamp 11 is electrically controlled by a light-sensing empty-liquid detection device 9 provided between the automatic tube clamp 11 and the central valve 6.

[0025] When the present invention is in use, the wash water pumps 10 of the two wash pipes 801 are alternately activated to achieve pulsed flushing. Specifically, by setting the two wash water pumps 10 to different infusion speeds, the different and varying constant speeds of the water flow in the two wash pipes 801 can produce pulsating water flows with different waveforms and flushing pressures. The flushed wash fluid enters the vascular access device 1 through the flushing check valve 703, which can improve the flushing effect compared to constant water flow flushing. In addition, the flushing circuit pressure is detected by the flushing pressure sensor 803. When the operating pressure of the two wash water pumps 10 is too high, the return water check valve 804 in the return pipe 802 is automatically opened to release the transient pressure caused by the wash water pumps 10 and prevent damage to the device.

[0026] The flushing pipe connection portion 601 includes a plurality of flushing pipe through-holes arranged around the upper portion of the central valve 6. One end of each of the flushing liquid pipes 8 is connected to each of these flushing pipe through-holes. In one embodiment, the number of flushing pipe through-holes and flushing liquid pipes 8 is four. In other embodiments, three or more flushing pipes 801 may be arranged to increase the pulse frequency, and correspondingly, a larger return pipe 802 or a larger number of return pipes 802 may be arranged.

[0027] The flushing pipe 801 is provided with a cleaning water pump 10, which is electrically controlled to open and close by a light-sensing empty-liquid detection device 9 located between the cleaning water pump 10 and the flushing liquid source. In one specific embodiment, the light-sensing empty-liquid detection device 9 is a photoelectric sensor, and the flushing check valve 703 is a normally open, electrically controlled check valve. When the flushing liquid in the flushing pipe 801 is emptied, the light signal received by the photoelectric sensor changes, thereby controlling the closure of the cleaning water pump 10, the flushing check valve 703, and the automatic tube clamp 11.

[0028] The push injection connection portion 602 includes a push injection through hole provided around the middle of the central valve 6, which communicates with the output end of the syringe 4. In one embodiment, the liquid outlet of the syringe 4 is directly connected by inserting the valve sleeve of the push injection through hole. In other embodiments, the syringe 4 can also be connected to the push injection through hole via a catheter.

[0029] In a specific embodiment, the infusion connection portion 603 includes an infusion through-hole provided at the bottom of the central valve 6 , the infusion through-hole is connected to the infusion tube 3 , and an injection needle 301 is provided at the end of the infusion tube 3 .

[0030] The flushing tube through hole of the flushing tube connection part 601, the push injection through hole of the push injection connection part 602 and the infusion through hole of the infusion connection part 603 are all sealedly connected to the corresponding pipelines through sealing rings or rubber valves to prevent leakage.

[0031] In one embodiment, the infusion connection portion 603 is provided with a liquid outlet pressure sensor 604 for detecting the outlet pressure of the infusion tube 3. When the flushing check valve 703 of the main passage 701 is closed, an infusion detection circuit is formed at the lower portion. When the liquid outlet pressure sensor 604 indicates excessive pressure or the optical empty liquid detection device 9 detects that the infusion tube 3 is empty, the automatic tube clamp 11 clamps the infusion tube 3 or reduces the injection speed of the injection device 2.

[0032] like Figure 5 As shown, the syringe 4 is a conventional syringe 4, comprising a syringe 401 with a liquid outlet head at its head end. A push rod 402 is disposed within the syringe 401. As the push rod 402 advances within the syringe 401, the stored medication can be ejected from the liquid outlet head. The injection device 2 comprises a housing, a propulsion driver 201, and a push block 202. The propulsion driver 201 can be a linearly driven telescopic motor or a rotary servo motor, with the guide sleeve and screw rod cooperating to convert rotary power into a telescopic motor. The push block 202 is driven by the propulsion driver 201 to extend and retract along the length of the syringe 4. The rear end of the push rod 402 of the syringe 4 rests against the push block 202. The push block 202's maximum travel allows it to push the push rod 402 to the bottom of the syringe 401, ensuring that all medication is ejected. After ejection, the push block 202 automatically returns to its original position, allowing the medical technician to replace the syringe 4 with a new one filled with medication.

[0033] In addition, the present invention can realize multi-way switching tube sealing and pulse cleaning for mixed injection of multiple drugs during use. Figure 2 Or the push injection device 2 shown in 3 is realized. At the same time, the push injection device 2 of the following scheme can be used alone to achieve multi-channel continuous drug supply.

[0034] like Figure 2In the illustrated embodiment, the push injection device 2 comprises four sets, arranged around the central valve 6. The output of each syringe 4 is directly connected to the push injection connection 602. The valve core 7 is controlled by a rotary motor 704 to rotate about the axis of the main passage 701. A branch passage 702 is defined on the sidewall of the valve core 7, connecting to the main passage 701. Depending on the position of the valve core 7, the branch passage 702 connects the valve core 7 to different syringes 4. During pulse cleaning, the valve core 7 is controlled by the rotary motor 704 to connect the branch passage 702 to syringe one. After cleaning syringe one, the valve core 7 rotates 90° to connect to and clean syringe two, followed by syringes three and four. Furthermore, four passages, each angled at 90°, are provided on the upper portion of the valve core 7. This ensures that no matter which syringe 4 the branch passage 702 is connected to, the upper flushing pipe connection 601 remains connected to the main passage 701, ensuring flushing liquid delivery. The fixer 203 is a flip-type fixer 203, which includes a foldable semicircular fixing plate. When in use, the semicircular fixing plate is folded over the syringe 4 and fixed by locking it with a lock on the side. A bolt is provided in the center of the semicircular fixing plate. By tightening the bolt, the syringe 4 can be pressed against the surface of the injection device 2.

[0035] like Figure 3 In a second embodiment shown, the push injection device 2 is provided in a set. A syringe switching device is provided at the front end of the push injection device 2, and a plurality of retainers 203 are mounted on the syringe switching device. The syringe switching device can transport the syringe 4 to a designated position, where the rear end of the push rod 402 of the syringe 4 is aligned with the push block 202 and the front end of the syringe 4 is in communication with the push injection connector 602. In this embodiment, the syringe switching device is an endless flexible belt rotation device. The retainers 203 secure the syringe 4 to an endless flexible belt 204. The inner ring of the endless flexible belt 204 is provided with a driving wheel 205 and a driven wheel 206. The driving wheel 205 is driven to rotate about an axis by a rotary actuator 207, driving the endless flexible belt 204. The retainers 203 move along the outer surface of the endless flexible belt 204 with the rotational drive, and stop when the retainers 203 reach the designated position.

[0036] A baffle is provided on one side of the retainer 203, and a photoelectric sensor is provided on one side of the central valve to detect the position of the baffle. Whenever the baffle, driven by the annular soft belt 204, passes between the photoelectric sensors, it is determined that the syringe 4 has reached the designated position. After a syringe 4 completes a push injection or cleaning, the rotary actuator 207 is controlled to rotate again to switch to the next syringe 4. The retainer 203 is a soft semi-ring clamp that can directly lock the syringe 4 into the retainer 203. The retainer 203 only restricts the circumferential and radial movement of the syringe 4, not its axial movement. In the initial state, the tip of the syringe 4 rests against the port of the push injection connection 602 of the central valve 6. As the push block 202 pushes the push rod 402, the syringe 4 is also propelled forward, and its liquid outlet is pressed into the wedge-shaped opening of the push injection connection 602, ensuring that the liquid medication accurately enters the vascular access device 1.

[0037] In other embodiments, the fastener 203 may also be a fixing solution that is easy to disassemble, such as a flap, buckle, or Velcro as in the first embodiment, and the annular soft belt 204 may be a belt, a cloth belt, etc.

[0038] All materials of the present invention are harmless common medical materials. The connection between the central valve 6 and the flushing liquid pipeline or the syringe 4 should be sealed to prevent leakage of the medicine or flushing liquid, such as using a sealing valve sleeve or an O-ring.

Claims

1. A push pump sealed tube pulsation cleaning device connected to a vascular access device, wherein the vascular access device includes a push pump device, an infusion tube and a syringe, characterized in that: The push pump sealing pipe pulsation cleaning device includes at least four flushing liquid pipelines and a central valve. Among them, at least two of the flushing liquid pipelines are used as flushing pipes, a flushing pressure sensor is provided at the end of one of the flushing liquid pipelines, and at least one of the flushing liquid pipelines is used as a return pipe, and a return one-way valve is provided on the return pipe. The central valve comprises a flushing pipe connection part, a push injection connection part and an infusion connection part which are sequentially connected from top to bottom. A valve core is provided in the central valve. The flushing tube connection part is communicated with the flushing liquid pipeline, the push injection connection part is communicated with the syringe, and the infusion connection part is communicated with the infusion tube. A main passage connecting the flushing tube connection part, the push injection connection part and the infusion connection part is provided in the valve core, and a flushing one-way valve is provided in the main passage between the flushing tube connection part and the push injection connection part. The infusion tube is provided with an automatic tube clamp, which is electrically controlled by a light-sensing empty-liquid detection device located between the automatic tube clamp and the central valve. The flushing pipe connecting portion includes a plurality of flushing pipe through holes arranged around the upper portion of the central valve, and one end of the flushing liquid pipeline is connected to the flushing pipe through holes in a one-to-one correspondence. The flushing pipe is provided with a cleaning water pump, which is electrically controlled to open and close by a light-sensing empty liquid detection device located between the cleaning water pump and the flushing liquid source. The infusion connection portion is provided with an outlet pressure sensor for detecting the outlet pressure of the infusion tube. When in use, the cleaning water pumps of the flushing pipes are started alternately to achieve pulse flushing.

2. The pulsating cleaning device for sealing tube of an injection pump according to claim 1, characterized in that: The push injection connection portion includes a push injection through hole arranged on the central circumference of the central valve, and the push injection through hole is communicated with the output end of the syringe.

3. The pulsating cleaning device for sealing tube of an injection pump according to claim 1, characterized in that: The infusion connection portion includes an infusion through-hole provided at the bottom of the central valve, the infusion through-hole is connected to the infusion tube, and an injection needle is provided at the end of the infusion tube.

4. The pulsating cleaning device for sealing tube of an injection pump according to claim 1, characterized in that: The push injection device includes a housing, a propulsion driver and a push block. The push block is driven by the propulsion driver to be retractable along the length direction of the syringe. The rear end of the push rod of the syringe rests on the push block.

5. The pulsating cleaning device for sealing tube of an injection pump according to claim 4, characterized in that: There are at least two sets of push injection devices, which are arranged with the central valve as the center. The output end of the syringe is directly connected to the push injection connection part. The valve core can rotate around the axis of the main passage through the control of a rotary motor. A branch passage connected to the main passage is opened on the side wall of the valve core. According to the rotation position of the valve core, the branch passage connects the valve core with different syringes.

6. The pulsating cleaning device for sealing tube of an injection pump according to claim 4, characterized in that: The number of the push injection device is one set. The front end of the push injection device is provided with a syringe switching device, and several syringes are provided on the syringe switching device. The syringe switching device can transport the syringes to a specified position, and the specified position refers to the position where the tail end of the push rod of the syringe is aligned with the push block and the head end of the syringe is connected to the push injection connection part.

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