Extracorporeal circulation waterway system capable of exhausting air

Abstract

The utility model discloses an extracorporeal circulation waterway system capable of exhausting air, which relates to the technical field of blood purification treatment and comprises a capacity kettle, a treatment liquid inlet pipeline, a dialysate pipeline, a displacement liquid pipeline, a waste liquid inlet pipeline and a waste liquid discharge pipeline. The volume pot comprises a treatment liquid volume pot and a waste liquid volume pot which are independently arranged; the treatment liquid inlet pipeline is connected with the treatment liquid volume kettle and is sequentially provided with a heating bag and an exhaust kettle, the exhaust kettle is connected with an exhaust assembly, the exhaust assembly is used for exhausting gas in the exhaust kettle, and treatment liquid flowing through the heating bag enters the exhaust kettle after being heated; the dialysate pipeline and the displacement liquid pipeline are both connected to the treatment liquid capacity kettle; and the waste liquid inlet pipeline and the waste liquid discharge pipeline are both connected to the waste liquid capacity kettle. By means of the arrangement, pressure unbalance in the volumetric kettle caused by gas accumulation in the blood purification process can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of blood purification treatment, in particular to an extracorporeal circulation waterway system capable of exhausting air. Background Art

[0002] CRRT (continuous renal replacement therapy) is an important medical technology in the intensive care unit, mainly used for treating various kidney diseases, poisoning and other critical diseases. In the prior art, during CRRT treatment, a semipermeable membrane filter is relied on to remove water and solutes in the blood, and separate the substances required by the body from the waste substances to be metabolized, and the substances required by the body are input into the body to maintain the balance of electrolytes in the body and the normal operation of the body. Through blood filtration treatment, inflammatory mediators in the blood can be eliminated, the physical condition of the patient can be improved, the probability of infection and concurrent inflammation can be reduced, and the function of the body's own immune system can be improved. During these treatment processes, the input of nutrients and the output of waste are transported by a peristaltic pump in cooperation with an extracorporeal circulation pipeline, and the extracorporeal circulation pipelines adopted by CRRT devices on the market are all special pipelines. When performing different mode of treatment operations, the pipelines, components, etc. need to be reassembled, resulting in a more cumbersome and time-consuming operation process, and most of them are extracorporeal pipelines without a metering device, resulting in low operation accuracy.

[0003] In addition, different from CRRT devices that use an electronic scale to measure liquid balance, CRRT devices that use a volumetric method to measure liquid balance are extremely sensitive to errors in volume. When additional gas enters the metering device of the pipeline, it will cause abnormal liquid metering, and the CRRT device will issue an alarm prompt for abnormal metering.

[0004] During blood purification, a large amount of replacement fluid is required, and these replacement fluids are usually sodium bicarbonate-based fluids. However, sodium bicarbonate solution is prone to precipitate trace amounts of gas during heating, and at the same time, a small amount of gas, such as carbon dioxide, will be decomposed. If these gases accumulate to a certain volume, pressure imbalance will occur, the device will issue an alarm, and the device will pause, thus affecting the blood purification effect and causing harm to the patient. In addition, due to the incomplete continuity of the liquid pumped by the peristaltic pump, the liquid output from the heating bag presents a pulse waveform, resulting in uneven temperature data obtained by the temperature sensor and affecting the control of temperature accuracy by the software system.

[0005] Therefore, how to avoid gas accumulation during blood purification, resulting in pressure imbalance in the volume pot, is a technical problem that those skilled in the art need to solve at present. Summary of the Utility Model

[0006] The purpose of the present utility model is to provide an extracorporeal circulation waterway system that can exhaust gas, which can avoid the imbalance of pressure in the volume pot caused by the accumulation of gas during blood purification.

[0007] To achieve the above purpose, the present utility model provides the following technical solutions:

[0008] An extracorporeal circulation waterway system that can exhaust gas, comprising:

[0009] A volume pot, including a treatment fluid volume pot and a waste fluid volume pot that are independently arranged;

[0010] A treatment fluid inlet pipeline, connected to the treatment fluid volume pot, and successively provided with a heating bag and an exhaust pot. The exhaust pot is connected with an exhaust assembly, and the exhaust assembly is used to discharge the gas in the exhaust pot. The treatment fluid flowing through the heating bag is heated and then enters the exhaust pot;

[0011] A dialysate pipeline and a replacement fluid pipeline, both connected to the treatment fluid volume pot;

[0012] A waste fluid inlet pipeline and a waste fluid discharge pipeline, both connected to the waste fluid volume pot.

[0013] Preferably, the exhaust assembly includes:

[0014] An exhaust device, connected to the exhaust pot, for pumping out the air in the exhaust pot;

[0015] A pinch clamp, installed on the connecting pipeline between the exhaust pot and the exhaust device, for switching the on or off state of the connecting pipeline between the exhaust pot and the exhaust device.

[0016] Preferably, the exhaust assembly further includes a pressure sensor, and the pressure sensor is communicated with the exhaust pot through a three-way joint. The pressure sensor is used to detect the gas pressure in the exhaust pot and control the start of the exhaust device when the pressure reaches a preset value.

[0017] Preferably, a hydrophobic air protection cover is arranged between the three-way joint and the pinch clamp, and the hydrophobic air protection cover is used to prevent liquid from entering the exhaust device and the pressure sensor.

[0018] Preferably, the pressure sensor is also electrically connected with an alarm, and the alarm is used to give an alarm when the pressure sensor detects the gas pressure in the exhaust pot and the pressure reaches a preset value.

[0019] Preferably, the exhaust device is a solenoid valve or a peristaltic pump.

[0020] Preferably, a temperature sensor is arranged at the outlet of the exhaust pot, and the temperature sensor is used to detect the temperature of the liquid discharged from the exhaust pot.

[0021] Preferably, the liquid in the treatment liquid inlet pipeline enters the bottom of the heating bag and flows out from the top of the heating bag.

[0022] Preferably, the treatment liquid volume kettle is connected to the treatment liquid kettle air extraction interface, and the waste liquid volume kettle is connected to the waste liquid kettle air extraction interface.

[0023] Preferably, an air extraction pump is connected to the treatment liquid kettle air extraction interface and the waste liquid kettle air extraction interface.

[0024] Compared with the above background technology, an ex vivo circulation waterway system capable of exhausting gas provided by the present utility model includes: a volume kettle, a treatment liquid inlet pipeline, a dialysate pipeline, a replacement liquid pipeline, a waste liquid inlet pipeline, and a waste liquid discharge pipeline; the volume kettle includes an independently arranged treatment liquid volume kettle and a waste liquid volume kettle; the treatment liquid inlet pipeline is connected to the treatment liquid volume kettle, and a heating bag and an exhaust kettle are sequentially arranged, the exhaust kettle is connected with an exhaust assembly, the exhaust assembly is used for exhausting the gas in the exhaust kettle, and the treatment liquid flowing through the heating bag is heated and then enters the exhaust kettle; the dialysate pipeline and the replacement liquid pipeline are both connected to the treatment liquid volume kettle; the waste liquid inlet pipeline and the waste liquid discharge pipeline are both connected to the waste liquid volume kettle.

[0025] Specifically, the treatment liquid inlet pipeline is connected to the treatment liquid bag. The treatment liquid first flows into the heating bag along the treatment liquid inlet pipeline. After coming out of the heating bag, it enters the exhaust kettle. After flowing out, it enters the treatment liquid volume kettle along the pipeline. After metering, the treatment liquid flowing out of the treatment liquid volume kettle enters the dialysate pipeline entirely, or enters the replacement liquid pipeline entirely, or is divided into two parts and enters the dialysate pipeline and the replacement liquid pipeline according to different treatment modes; in addition, the tail interface of the waste liquid inlet pipeline (inlet relative to the volume kettle) is connected to the filter, and the waste liquid enters the waste liquid volume kettle along the pipeline. After metering, it enters the waste liquid bag for storage through the waste liquid discharge pipeline. It should be noted that the exhaust kettle is also connected with an exhaust assembly. When the gas precipitated and decomposed after the treatment liquid is heated will enter the exhaust kettle along with the liquid, and then all the gas will be exhausted by the exhaust assembly connected to the exhaust kettle, so as to ensure that there is no gas in the liquid entering the volume kettle, thereby preventing the treatment from being interrupted due to the pressure imbalance in the volume kettle. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0027] Figure 1 It is a schematic structural diagram of the ex vivo circulation waterway provided by the embodiment of the present utility model;

[0028] Figure 2 Schematic diagram of the exhaust device provided by the embodiment of the present utility model.

[0029] Wherein:

[0030] 110 - Treatment liquid volume pot, 120 - Waste liquid volume pot, 130 - Air extraction interface of the treatment liquid pot, 140 - Air extraction interface of the waste liquid pot;

[0031] 200 - Treatment liquid inlet pipeline, 210 - Heating bag, 220 - Exhaust pot, 221 - Exhaust device, 222 - Clamp, 223 - Pressure sensor, 224 - Three - way joint, 225 - Hydrophobic air protection cover, 230 - Temperature sensor;

[0032] 300 - Dialysate pipeline;

[0033] 400 - Replacement liquid pipeline;

[0034] 500 - Waste liquid inlet pipeline;

[0035] 600 - Waste liquid discharge pipeline. Specific embodiments

[0036] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0037] In order to enable those skilled in the art of this technology to better understand the solution of the present utility model, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the indicated position or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present utility model.

[0039] The purpose of the present utility model is to provide an extracorporeal circulation waterway system that can exhaust air, which can avoid the pressure imbalance in the volume pot caused by the accumulation of gas during blood purification.

[0040] To achieve the above - mentioned purpose, the present utility model provides the following technical solutions:

[0041] Please refer toFigure 1 and Figure 2 , this embodiment provides an extracorporeal circulation waterway system capable of exhausting gas, including: a volume pot, a treatment fluid inlet pipeline 200, a dialysate pipeline 300, a replacement fluid pipeline 400, a waste fluid inlet pipeline 500, and a waste fluid discharge pipeline 600; the volume pot includes an independently arranged treatment fluid volume pot 110 and a waste fluid volume pot 120; the treatment fluid inlet pipeline 200 is connected to the treatment fluid volume pot 110, and a heating bag 210 and an exhaust pot 220 are sequentially arranged, and the exhaust pot 220 is connected with an exhaust assembly, and the exhaust assembly is used to exhaust the gas in the exhaust pot 220, and the treatment fluid flowing through the heating bag 210 is heated and then enters the exhaust pot 220; both the dialysate pipeline 300 and the replacement fluid pipeline 400 are connected to the treatment fluid volume pot 110; both the waste fluid inlet pipeline 500 and the waste fluid discharge pipeline 600 are connected to the waste fluid volume pot 120.

[0042] Among them, there are two treatment fluid volume pots 110 and two waste fluid volume pots 120 in this embodiment. The two treatment fluid volume pots 110 and the two waste fluid volume pots 120 are arranged in parallel. The treatment fluid volume pot 110 is used to accommodate and measure the volume of the heated treatment fluid, while the waste fluid volume pot 120 is used to accommodate and measure the volume of the waste fluid generated during the treatment process; in this embodiment, the treatment fluid inlet pipeline 200 is connected to the treatment fluid bag, and the treatment fluid first flows into the heating bag 210 from the treatment fluid inlet pipeline 200; the heating bag 210 is specifically a container that can heat the flowing internal liquid, and specifically, an external heating device can be used to heat the treatment fluid flowing through the heating bag 210; when the treatment fluid is heated by the heating bag 210, it will enter the exhaust pot 220, and the heated treatment fluid will generate gas. When the gas enters the interior of the exhaust pot 220 together with the treatment fluid, the exhaust assembly connected to the upper end of the exhaust pot 220 can extract the generated gas. After the gas is exhausted, the treatment fluid will continue to be transported forward, enter the treatment fluid volume pot 110 along the pipeline, and after being metered, the treatment fluid flowing out of the treatment fluid volume pot 110, according to different treatment modes, either all enters the dialysate pipeline 300, or all enters the replacement fluid pipeline 400, or is divided into two parts and enters the dialysate pipeline 300 and the replacement fluid pipeline 400; in addition, the tail interface of the waste fluid inlet pipeline 500 (which is the inlet relative to the waste fluid volume pot 120) is connected to the dialyzer, and the waste fluid enters the waste fluid volume pot 120 along the pipeline, is metered and then discharged and enters the waste fluid bag for storage through the waste fluid discharge pipeline 600.

[0043] It can be understood that the setting of the exhaust pot 220 and the exhaust assembly at the upper end of the exhaust pot 220 in this embodiment can exhaust the gas precipitated and decomposed from the treatment fluid after heating during the treatment process, so that the gas will not enter the exhaust pot 220 along with the liquid, thus ensuring that there is no gas in the liquid entering the volume pot, and preventing the treatment from being interrupted due to the pressure imbalance in the volume pot.

[0044] Preferably, the exhaust assembly includes: an exhaust device 221 and a hose clamp 222; the exhaust device 221 is connected to the exhaust flask 220 for extracting the air inside the exhaust flask 220; the hose clamp 222 is installed on the connecting pipeline between the exhaust flask 220 and the exhaust device 221 for switching the on or off state of the connecting pipeline between the exhaust flask 220 and the exhaust device 221.

[0045] Specifically, as Figure 2 shown, an exhaust device 221 is connected to the upper end of the exhaust flask 220 through a connecting pipeline. The exhaust device 221 is a device that can extract the gas inside the exhaust flask 220. It should be noted that when the gas in the exhaust flask 220 has not accumulated yet, the exhaust device 221 has not started working. A hose clamp 222 needs to be installed on the hose at the upper end outlet of the exhaust flask 220 to ensure the airtightness of the exhaust flask 220 and prevent the exhaust flask 220 from leaking air and affecting the treatment effect.

[0046] Preferably, the exhaust assembly further includes a pressure sensor 223, and the pressure sensor 223 is communicated with the exhaust flask 220 through a tee joint 224. The pressure sensor 223 is used to detect the gas pressure inside the exhaust flask 220 and control the start of the exhaust device 221 when the pressure reaches a preset value.

[0047] It can be understood that in order to clearly judge when it is necessary to exhaust the exhaust flask 220, a tee joint 224 is provided on the connecting pipeline between the exhaust device 221 and the exhaust flask 220. One end of the tee joint 224 is connected to the upper end of the exhaust flask 220, one end is connected to the exhaust device 221, and the last end is connected to the pressure sensor 223. In this way, the pressure sensor 223 can detect the pressure inside the exhaust flask 220, and then judge whether the exhaust flask 220 needs to be exhausted. When it is detected that the pressure of the exhaust flask 220 reaches the preset threshold, it can transmit a signal to the dialysis machine, and the processing unit integrated inside the dialysis machine processes the information transmitted by the pressure sensor 223 and controls the exhaust device 221 to start working to discharge the gas inside the exhaust flask 220. It should be noted that the signal processing and signal control involved in this embodiment can be realized by existing technologies. This embodiment only proposes a way to feedback and control the action of the exhaust device 221 through the pressure sensor 223, and does not make any improvements to the control program and software algorithm.

[0048] Preferably, a hydrophobic air protection cover 225 is provided between the tee joint 224 and the hose clamp 222. The hydrophobic air protection cover 225 is used to prevent liquid from entering the exhaust device 221 and the pressure sensor 223.

[0049] It should be noted that since the gas in the exhaust flask 220 is generated from the treatment liquid, it is possible to draw out the treatment liquid simultaneously when drawing out the gas. Therefore, a hydrophobic air protection cover 225 is provided on the hose between the three-way joint 224 and the pinch clamp 222, which can effectively prevent the treatment liquid from flushing into the exhaust device 221 and the pressure sensor 223, thus ensuring the normal operation of the exhaust device 221 and the pressure sensor 223.

[0050] Preferably, the pressure sensor 223 is also electrically connected to an alarm, and the alarm is used to give an alarm when the pressure sensor 223 detects the gas pressure in the exhaust flask 220 and the pressure reaches a preset value.

[0051] Furthermore, when too much gas accumulates in the exhaust flask 220 and goes unnoticed, the gas will still enter the treatment liquid volume flask 110 along with the treatment liquid. Therefore, the pressure sensor 223 in this embodiment is also electrically connected to an alarm, where the alarm can give an audible and visual alarm, and the alarm item is displayed on the display screen to remind the medical staff to handle it.

[0052] Preferably, the exhaust device 221 is a solenoid valve or a peristaltic pump.

[0053] Specifically, the exhaust device 221 is preferably a solenoid valve or a peristaltic pump in this embodiment. Of course, other devices that can extract the gas in the exhaust flask 220 can also be selected according to the actual situation, which is not specifically limited in this article as long as the purpose can be achieved.

[0054] Preferably, a temperature sensor 230 is provided at the outlet of the exhaust flask 220, and the temperature sensor 230 is used to detect the temperature of the liquid discharged from the exhaust flask 220.

[0055] It should be noted that the treatment liquid inlet pipeline 200 usually uses a peristaltic pump as the power source to transport the treatment liquid. However, due to the incomplete continuity of the liquid pumped by the peristaltic pump, the liquid output from the heating bag 210 presents a pulsed waveform, resulting in uneven temperature data obtained for the output liquid and affecting the control of the temperature accuracy by the software system; in this embodiment, since the treatment liquid is heated in the heating bag 210 and then stored in the exhaust flask 220 in a certain amount before being discharged for temperature measurement, this eliminates the influence brought by the pulsed waveform of the output liquid, making the temperature data measured by the temperature sensor 230 more stable and consistent, and the equipment program can more easily control the temperature.

[0056] Preferably, the liquid in the treatment liquid inlet pipeline 200 enters the bottom of the heating bag and flows out from the top of the heating bag.

[0057] Optionally, an electric heating element can also be provided inside the heating bag 210. By energizing the electric heating element, the temperature of the heating bag 210 can be increased, thereby heating the treatment liquid entering the heating bag 210. In actual operation, the extracorporeal circulation waterway system proposed in this embodiment is installed on a dialysis machine. Therefore, an electric heating element can be provided at the corresponding position of the dialysis machine to heat the treatment liquid in the heating bag 210. In addition, the liquid in the treatment liquid inlet pipeline 200 will flow into the bottom of the heating bag 210 and be output from the top of the heating bag 210, so that the treatment liquid can be heated more evenly and quickly.

[0058] Preferably, the treatment liquid capacity pot 110 is connected to the treatment liquid pot air extraction interface 130, and the waste liquid capacity pot 120 is connected to the waste liquid pot air extraction interface 140.

[0059] As Figure 1 shown, the treatment liquid capacity pot 110 is connected to the treatment liquid pot air extraction interface 130, and the waste liquid capacity pot 120 is connected to the waste liquid pot air extraction interface 140. In this way, the pressures inside the treatment liquid capacity pot 110 and the waste liquid capacity pot 120 can be controlled respectively through the treatment liquid pot air extraction interface 130 and the waste liquid pot air extraction interface 140.

[0060] Preferably, an air extraction pump is connected to the treatment liquid pot air extraction interface 130 and the waste liquid pot air extraction interface 140.

[0061] Specifically, in this embodiment, the air in the treatment liquid capacity pot 110 and the waste liquid capacity pot 120 is extracted by the air extraction pump to control the pressures inside the two.

[0062] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0063] The various embodiments in this specification are described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0064] The above has introduced the embodiments provided by the present invention in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. An extracorporeal circulation water system capable of exhausting air, characterized in that: include: A volume pot, comprising a treatment liquid volume pot (110) and a waste liquid volume pot (120) which are independently arranged; A treatment liquid inlet pipeline (200) is connected to the treatment liquid volume pot (110), and is provided with a heating bag (210) and an exhaust pot (220) in sequence, wherein the exhaust pot (220) is connected to an exhaust component, and the exhaust component is used to exhaust the gas in the exhaust pot (220), and the treatment liquid flowing through the heating bag (210) enters the exhaust pot (220) after being heated; The dialysate pipeline (300) and the replacement fluid pipeline (400) are both connected to the treatment fluid volume pot (110); The waste liquid inlet pipeline (500) and the waste liquid discharge pipeline (600) are both connected to the waste liquid capacity pot (120).

2. The ventilated extracorporeal circulation water system according to claim 1, characterized in that: The exhaust assembly comprises: An exhaust device (221), connected to the exhaust pot (220), and used to extract air from the exhaust pot (220); The pipe clamp (222) is installed on the connecting pipe between the exhaust pot (220) and the exhaust device (221) and is used to switch the connecting pipe between the exhaust pot (220) and the exhaust device (221) between the conducting state and the clamping state.

3. The ventilated extracorporeal circulation water system according to claim 2, characterized in that: The exhaust assembly further comprises a pressure sensor (223), and the pressure sensor (223) is connected to the exhaust pot (220) via a three-way joint (224), and the pressure sensor (223) is used to detect the gas pressure in the exhaust pot (220) and control the exhaust device (221) to start when the pressure reaches a preset value.

4. The ventilated extracorporeal circulation water system according to claim 3, characterized in that: A hydrophobic air protective cover (225) is provided between the three-way connector (224) and the pipe clamp (222), and the hydrophobic air protective cover (225) is used to prevent liquid from entering the exhaust device (221) and the pressure sensor (223).

5. The ventilated extracorporeal circulation water system according to claim 4, characterized in that: The pressure sensor (223) is also electrically connected to an alarm, and the alarm is used to sound an alarm when the pressure sensor (223) detects the gas pressure in the exhaust pot (220) and the pressure reaches a preset value.

6. The ventilated extracorporeal circulation water system according to claim 4, characterized in that: The exhaust device (221) is a solenoid valve or a peristaltic pump.

7. The ventilated extracorporeal circulation water system according to claim 1, characterized in that: A temperature sensor (230) is provided at the outlet of the exhaust pot (220), and the temperature sensor (230) is used to detect the temperature of liquid discharged from the exhaust pot (220).

8. The ventilated extracorporeal circulation water system according to claim 1, characterized in that: The liquid in the treatment liquid inlet pipeline (200) enters the bottom of the heating bag and flows out from the top of the heating bag.

9. The ventilated extracorporeal circulation water system according to claim 1, characterized in that: The treatment liquid capacity pot (110) is connected to the treatment liquid pot air extraction interface (130), and the waste liquid capacity pot (120) is connected to the waste liquid pot air extraction interface (140).

10. The ventilated extracorporeal circulation water system according to claim 9, characterized in that: The treatment liquid pot air extraction interface (130) and the waste liquid pot air extraction interface (140) are connected to an air extraction pump.

Images