Pulsation cleaning device for sealing pipe of injection pump

Abstract

The invention relates to an injection pump tube sealing pulsating cleaning device which is connected with a blood vessel access device, the blood vessel access device comprises an injection device, an infusion tube and an injector, the injection pump tube sealing pulsating cleaning device comprises at least four tube washing liquid pipelines and a center valve, two tube washing liquid pipelines serve as washing tubes, and the center valve serves as a central valve. A flushing pressure sensor is arranged at the tail end of one pipe flushing liquid pipeline, the other pipe flushing liquid pipeline serves as a water return pipe, the center valve comprises a pipe flushing connecting part, a pushing and injecting connecting part and a liquid conveying connecting part which are sequentially connected from top to bottom, and an automatic pipe clamping device is arranged on the liquid conveying pipe. The two cleaning water liquid pumps are used for pumping cleaning flow into the infusion tube in a pulsating mode, the tube washing effect is improved, and a good cleaning effect on thick injection medicine is achieved. Meanwhile, through cooperation of empty liquid detection, an automatic pipe clamping device, a pressure sensor and a water return one-way valve of a water return pipe, the situation that the pipeline is damaged by transient pressure caused by starting of the cleaning water liquid pump is avoided.

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 available in all internal medicine, surgery, gynecology, pediatrics, and critical care departments in medical institutions of all levels and types. Studies have shown that currently as many as 85% of hospitalized patients need the help of vascular access devices to deliver essential fluids, drugs, nutrients, blood products, or to facilitate blood sampling.

[0003] Except for disposable steel needles, all vascular access devices should be properly flushed and sealed before and after medication and during daily maintenance. Flushing refers to flushing the infusion catheter and related connecting devices with normal saline, especially after the end of the medication treatment, to ensure that there is no residual drug solution; sealing refers to injecting sealing fluid into the infusion catheter and the entire set of connecting devices that need to be retained, and preventing blood from flowing back in the blood vessels to block the catheter, and also preventing external sources of infection from entering the human body. Usually, different concentrations of heparin solutions and preservative-free normal saline can be used as sealing fluids for central venous access.

[0004] At present, all vascular access devices for intravenous treatment use the method of flushing and sealing separately, including the central venous catheter 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 the port of its connecting device need to be disinfected between the two operations; 2) Frequent replacement of syringes, disconnection and exposure of ports are very unfavorable for preventing 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 department 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 nursing staff, thereby affecting the quality of nursing; 6) The conventional flushing solution is injected into the catheter at a uniform speed. For some viscous or easy-to-adhere to the wall liquid, it cannot be guaranteed to be completely flushed out. Some need to replace 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 injection 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, which is 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, and the central valve includes a flushing pipe connecting part, a push-injection connecting part, which are connected in sequence from top to bottom and an infusion connection part, a valve core is arranged 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, 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 arranged in the valve core, a flushing one-way valve is arranged in the main passage at a position between the flushing tube connection part and the push injection connection part, an automatic tube clamp is arranged on the infusion tube, and the automatic tube clamp is electrically controlled by a light-sensing empty-liquid detection device arranged 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 on the upper circumference of the central valve, and one end of the flushing pipe 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 be opened and closed by a light-sensitive empty-liquid detection device arranged between the cleaning water pump and the flushing pipe liquid source.

[0009] Preferably, 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.

[0010] Preferably, the infusion connection portion comprises 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 push driver and a push block, wherein the push block is driven by the push driver to be retractable along the length direction of the syringe, and the rear end of the push rod of the syringe abuts against 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. 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.

[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 a position where the rear 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 beneficial effect is that the present invention uses two-way cleaning water pumps to pulsatingly pump 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 coordination of empty liquid detection, automatic tube clamp, pressure sensor and 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a stereoscopic diagram of a push pump sealing tube pulsation cleaning device.

[0017] Figure 2 A stereoscopic diagram of a push pump sealed tube pulsating cleaning device equipped with a vascular access device according to a first embodiment.

[0018] Figure 3 A stereoscopic diagram of a second embodiment of an injection 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 medium push injection device.

[0021] Among them, 1-vascular access device; 2-injection device; 201-propelling driver; 202-pushing block; 203 fixing device; 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-central valve; 601-flushing tube connecting 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-cleaning water pump; 11-automatic tube clamp.

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

[0023] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it 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 within the scope limited by the appended claims of the application equally.

[0024] like Figure 1 As shown, the present invention provides a push-injection 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 are used 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 is used 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 which are 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 with the flushing liquid pipeline 8, the push injection connection part 602 is connected with the syringe 4, and the infusion connection part 603 is communicated with 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 arranged between the automatic tube clamp 11 and the central valve 6.

[0025] When the present invention is in use, the cleaning water pumps 10 of the two-way flushing pipes 801 are started alternately to realize pulse flushing. Specifically, by setting the two cleaning water pumps 10 to different infusion speeds, the different and changing constant speeds of the water flow in the two flushing pipes 801 can present pulsating water flows and flushing pressures of different waveforms. The flushed cleaning liquid 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-way cleaning water pumps 10 is too high, the return water check valve 804 in the return water pipe 802 is automatically opened to release the transient pressure caused by the cleaning water pump 10 to avoid damage to the device.

[0026] The flushing pipe connection part 601 includes a plurality of flushing pipe through holes arranged around the upper part of the center valve 6, and one end of the flushing pipe liquid pipeline 8 is connected to the flushing pipe through holes one by one. In a specific embodiment, the number of the flushing pipe through holes and the flushing pipe liquid pipeline 8 are both four. In other embodiments, three or more flushing pipes 801 can be arranged to increase the pulse frequency and a larger return pipe 802 or a larger number of return pipes 802 can be arranged accordingly.

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

[0028] The push injection connection part 602 includes a push injection through hole provided on the central circumference of the central valve 6, and the push injection through hole is communicated with the output end of the syringe 4. In a specific embodiment, the liquid outlet head of the syringe 4 is directly connected by inserting into the valve sleeve of the push injection through hole, and in other embodiments, the syringe 4 can also be connected to the push injection through hole through 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 sealed and connected with the corresponding pipelines through sealing rings or rubber valves to prevent leakage.

[0031] In a specific embodiment, the infusion connection part 603 is provided with an 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 loop is formed at the lower part, and when the outlet pressure sensor 604 shows that the pressure is too high 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, including a syringe 401 with a liquid outlet head at the head end, and a push rod 402 is arranged in the syringe 401. As the push rod 402 moves forward in the syringe 401, the stored medicine can be pushed out from the liquid outlet head. The push injection device 2 includes 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, and the rotary power is converted into a telescopic motor through the matching structure of the guide sleeve and the screw rod. The push block 202 is driven by the propulsion driver 201 and can be telescopic along the length direction of the syringe 4. The rear end of the push rod 402 of the syringe 4 abuts against the push block 202. The maximum stroke of the push block 202 can push the push rod 402 to the bottom of the syringe 401 to ensure that all the medicine is pushed out. After being pushed out, the push block 202 can automatically return to its position, and the medical technician replaces the syringe 4 filled with medicine.

[0033] In addition, the present invention can realize multi-channel 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 realize multi-channel continuous drug supply.

[0034] like Figure 2In the specific embodiment 1 shown, the number of the push injection device 2 is four sets, which are arranged with the central valve 6 as the center. The output end of the syringe 4 is directly connected to the push injection connection part 602, and the valve core 7 can rotate around the axis of the main passage 701 through the control of the rotary motor 704. The side wall of the valve core 7 is provided with a branch passage 702 connected to the main passage 701. According to the rotation position of the valve core 7, the branch passage 702 connects the valve core 7 with different syringes 4. During pulse cleaning, the valve core 7 is controlled by the rotary motor 704 to connect the branch passage 702 with the syringe 1, and rotates 90° after the cleaning of the syringe 1 to connect and clean the syringe 2, and then the syringes 3 and 4 are cleaned in sequence. At the same time, the upper part of the valve core 7 is provided with four passages with an angle of 90° between each other so that no matter which syringe 4 the branch passage 702 is connected to, the upper flushing pipe connection part 601 can be connected to the main passage 701 to ensure the delivery of flushing liquid. The fixer 203 is a flap-type fixer 203, comprising 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 side lock. A bolt is provided in the center of the semicircular fixing plate, and the syringe 4 can be pressed against the surface of the injection device 2 by tightening the bolt.

[0035] like Figure 3 In the second specific embodiment shown, the number of the push injection device 2 is one set, and a syringe switching device is provided at the front end of the push injection device 2, and a plurality of fixtures 203 are provided on the syringe switching device. The syringe switching device can transport the syringe 4 to a specified position, and the specified position refers to a position where the rear end of the push rod 402 of the syringe 4 is aligned with the push block 202 and the head end of the syringe 4 is connected to the push injection connection part 602. In this embodiment, the syringe switching device is an annular soft belt type rotation device, and the fixture 203 fixes the syringe 4 on the annular soft belt 204. The inner ring of the annular soft belt 204 is provided with a driving wheel 205 and a driven wheel 206. The driving wheel 205 is driven by a rotary driver 207 to rotate around the axis, and the driving wheel 205 drives the annular soft belt 204 to drive. The fixture 203 moves on the outer surface of the annular soft belt 204 with the transmission, and stops when the fixture 203 moves to the specified position.

[0036] A baffle is provided on one side of the holder 203, and a photoelectric sensor for detecting the position of the baffle is provided on one side of the central valve. Whenever the baffle passes through the photoelectric sensor along with the transmission of the annular soft belt 204, it is determined that the syringe 4 has reached the designated position. When a syringe 4 completes the injection or cleaning, the rotary driver 207 is controlled to rotate again to switch the next syringe 4. The holder 203 is a soft semi-ring clamp, which can directly clamp the syringe 4 into the holder 203. The holder 203 only limits the circumferential and radial movement of the syringe 4 but does not limit its axial movement. In the initial state, the head end of the syringe 4 abuts against the port of the injection connection part 602 of the central valve 6. As the push block 202 pushes the push rod 402, the syringe 4 is also pushed forward at the same time, and its liquid outlet is pressed into the wedge-shaped opening of the injection connection part 602, ensuring that the liquid medicine 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 type, a buckle or a 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 sealing tube pulsation cleaning device, connected to a vascular access device, the vascular access device comprising a push injection device, an infusion tube and a syringe, characterized in that: The push injection pump sealing pipe pulsation cleaning device includes at least four flushing liquid pipelines and a central valve. Among them, 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 check valve is provided on the return pipe. The central valve comprises a flushing tube connection part, a push injection connection part and an infusion connection part which are sequentially connected from top to bottom, and a valve core is arranged 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 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 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.

2. The pulsation cleaning device for sealing tube of an injection pump according to claim 1, characterized in that: The flushing pipe connecting portion includes a plurality of flushing pipe through holes arranged on the circumference of the upper portion of the central valve, and one end of the flushing pipe liquid pipeline is connected to the flushing pipe through holes in a one-to-one correspondence.

3. The pulsation cleaning device for sealing tube of an injection pump according to claim 2, characterized in that: The flushing pipe is provided with a cleaning water pump, and the cleaning water pump is electrically controlled to open and close by a light-sensitive empty liquid detection device arranged between the cleaning water pump and the flushing pipe liquid source.

4. The pulsation 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.

5. The pulsation cleaning device for sealing tube of an injection pump according to claim 1, characterized in that: The infusion connection part comprises an infusion through hole arranged at the bottom of the central valve, the infusion through hole is connected to the infusion tube, and an injection needle is arranged at the end of the infusion tube.

6. The pulsation cleaning device for sealing tube of an injection pump according to claim 1, characterized in that: The infusion connection portion is provided with an outlet pressure sensor for detecting the outlet pressure of the infusion tube.

7. The pulsation cleaning device for sealing tube of an injection pump according to claim 1, characterized in that: The push injection device comprises a housing, a push driver and a push block. The push block is driven by the push driver to be retractable along the length direction of the syringe, and the rear end of the push rod of the syringe abuts against the push block.

8. The pulsation cleaning device for sealing tube of an injection pump according to claim 7, characterized in that: The number of the push injection devices is at least two, and they 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. 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.

9. The pulsation cleaning device for sealing tube of an injection pump according to claim 7, characterized in that: The number of the push injection device is one set. 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. The specified position refers to a position where the rear 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.

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