Sampling device for hemodialysis machine and hemodialysis machine

Abstract

The utility model discloses a sampling device for a hemodialysis machine, and relates to the field of blood purification equipment, the sampling device comprises a connecting pipe body and a switching valve, the connecting pipe body comprises a liquid circulation pipeline and a liquid outlet pipeline, the liquid outlet pipeline is fixedly connected with the side wall of the liquid circulation pipeline, the liquid outlet pipeline is communicated with the liquid circulation pipeline, and the switching valve is connected with the connecting pipe body. Two circulation ports of the circulation pipeline are fixedly connected and communicated with the liquid circulation connector of the dialysis machine body and the dialysis pipeline respectively, and the circulation ports of the circulation pipeline are detachably and fixedly connected with the liquid circulation connector; the switching valve is provided with a liquid inlet connector, a liquid discharge connector and a sampling connector, the liquid inlet connector is detachably connected with the liquid outlet of the liquid outlet pipeline, the liquid inlet connector can be communicated with the liquid discharge connector or the sampling connector, and the sampling connector can be fixedly connected with the sample storage device. The utility model further discloses the hemodialysis machine comprising the sampling device for the hemodialysis machine. The device is simple to operate, and can improve the working efficiency, reduce the false positive probability of the sampled sample and reduce the economic loss.

Description

Technical Field

[0001] The utility model relates to the technical field of blood purification equipment, in particular to a sampling device for a hemodialysis machine and a hemodialysis machine. Background Art

[0002] Hemodialysis machines are used for hemodialysis, which is one of the renal replacement therapies for patients with acute and chronic renal failure. According to the 2021 version of the Standard Operating Procedures for Blood Purification, hemodialysis machines should be cultured for bacteria every month, and each hemodialysis machine should be tested at least once a year, including sampling and testing of dialysate, reverse osmosis water, etc.

[0003] Conventional sampling is to take samples from the bypass connector on the hemodialysis machine for inputting dialysate. The specific sampling steps are: one person holds the bypass connector to allow the liquid in the hemodialysis machine to flow out into the container, and one person uses a syringe to reach into the bypass connector to extract samples. Two people are required to cooperate in sampling, which is inconvenient to operate. The sampling interface of the existing hemodialysis machine is integrated on the hemodialysis machine, which is not easy to disassemble and assemble, and the sampling port of the sampling interface extends out of the inner cavity of the hemodialysis machine. When the hemodialysis machine is automatically disinfected, the sampling port cannot be disinfected well, and the sampling interface is not easy to cancel separate disinfection. Sampling from the sampling port is prone to sample contamination, causing the test result to exceed the standard and be false positive, affecting the normal use of the dialysis machine and causing unnecessary economic losses.

[0004] Chinese patent CN201420493483.9 provides a hemodialysis machine endotoxin sampler and a hemodialysis machine, which includes an integrated three-way tube body, on which are arranged two A ends that can be connected to the dialysate outlet pipe of the dialyzer and a B end that is blocked with a medical silicone cap, and the medical silicone cap can be automatically sealed after being punctured by a syringe. The liquid inlet channel at the B end of the three-way tube body of the patent will form a dialysate and the like, forming a dead space, and the toxins and the like in the accumulated liquid are prone to exceed the standard. The syringe directly extracts the liquid at the B end of the three-way tube body for detection, which is likely to cause the sampling test result to be a false positive state. Utility Model Content

[0005] The purpose of the utility model is to provide a sampling device for a hemodialysis machine and a hemodialysis machine to solve the problems existing in the above-mentioned prior art, which is simple to operate and is conducive to improving work efficiency; it can reduce the probability of false positives in sampled samples, thereby reducing economic losses.

[0006] To achieve the above purpose, the utility model provides the following solutions:

[0007] The utility model provides a sampling device for a hemodialysis machine, comprising a connecting tube body and a switching valve, wherein:

[0008] The connecting pipe body comprises a liquid circulation pipeline and a liquid outlet pipeline, the liquid outlet pipeline is fixedly connected to the side wall of the liquid circulation pipeline, and the liquid outlet pipeline is communicated with the liquid circulation pipeline, the two circulation ports of the circulation pipeline are respectively used to be fixedly connected and communicated with the liquid circulation joint of the dialysis machine body and the dialysis pipeline, and the circulation port of the circulation pipeline is detachably fixedly connected to the liquid circulation joint;

[0009] The switching valve has a liquid inlet interface, a liquid discharge interface and a sampling interface. The liquid inlet interface can be detachably fixedly connected and communicated with the liquid outlet of the liquid outlet pipeline. The liquid inlet interface can be communicated with the liquid discharge interface or the sampling interface, and the sampling interface can be fixedly connected to a sample storage device.

[0010] Preferably, the sample storage device is further included, and the liquid inlet of the sample storage device is used to be detachably fixedly connected to the sampling interface.

[0011] Preferably, a liquid discharge pipe is further included, and a liquid inlet of the liquid discharge pipe is used for being detachably fixedly connected to the liquid discharge interface.

[0012] Preferably, it further comprises a cover body, wherein the cover body is used to be detachably fixedly connected to the sampling interface.

[0013] Preferably, it further comprises a flow regulating device, which is communicated with both the liquid outlet pipeline and the sample storage device, and can regulate the flow of the liquid outlet pipeline entering the sample storage device.

[0014] Preferably, the sample storage device comprises a sampling bag, and the sampling bag comprises a bag body and a sampling tube, and two ends of the sampling tube are respectively fixedly connected and communicated with the sampling interface and the inlet of the bag body.

[0015] Preferably, the sample storage device further comprises a syringe, and the sampling interface can be detachably connected to an inlet of the syringe or an inlet of the sampling tube.

[0016] The utility model provides a hemodialysis machine, comprising a liquid circulation joint, a dialysis pipeline and a sampling device for the hemodialysis machine. Two circulation ports of the circulation pipeline are respectively used to connect and communicate with the liquid circulation joint and the dialysis pipeline.

[0017] Compared with the prior art, the utility model has achieved the following technical effects:

[0018] The utility model provides a sampling device for a hemodialysis machine and a hemodialysis machine, comprising a connecting tube body and a switching valve, the connecting tube body comprising a liquid circulation pipeline and a liquid outlet pipeline, the liquid outlet pipeline is communicated with the liquid circulation pipeline, two circulation ports of the circulation pipeline are respectively used to connect and communicate with the liquid circulation joint and the dialysis pipeline of the hemodialysis machine, and the circulation port of the circulation pipeline is detachably fixedly connected with the liquid circulation joint; the switching valve has a liquid inlet interface, a liquid discharge interface and a sampling interface, the liquid inlet interface is detachably fixedly connected with the liquid outlet of the liquid outlet pipeline and is communicated with, the liquid inlet interface can be communicated with the liquid discharge interface or the sampling interface, and the sampling interface can be connected with a sample storage device. When sampling, first switch the switching valve to connect the liquid inlet interface with the liquid discharge interface, so that the liquid accumulated in the channel between the inlet of the liquid outlet pipeline and the switching valve is discharged through the liquid discharge interface, and then switch the switching valve to connect the liquid inlet interface with the sampling interface to perform sampling, which can reduce or avoid the probability of the sampled sample being mixed with liquid with excessive toxins, thereby reducing the probability of false positives in the sampled sample. When sampling, it is only necessary to install the sample storage device to the sampling interface and switch the switching valve to achieve sampling. The operation is simple and can be completed by one person independently, which can save operation time. The circulation port and the liquid circulation joint of the circulation pipeline can be disassembled. When disinfecting, the sampling device can be removed from the liquid circulation joint, so that the connecting tube body is placed in the disinfection chamber of the hemodialysis machine together with the dialysis pipeline for disinfection, and there is no need to disinfect the connecting tube body separately; the liquid inlet interface and the liquid outlet of the liquid outlet pipeline can be detachably fixedly connected, so that the switching valve can be easily removed. The switching valve can be disposable and does not require additional disinfection, which can reduce the workload of disinfection and reduce the probability of false positive sampling samples due to contamination of the sampling device, thereby reducing economic losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 Schematic diagram of the structure of the sampling device for the hemodialysis machine provided in Example 1 Figure 1 ;

[0021] Figure 2 Schematic diagram of the structure of the sampling device for the hemodialysis machine provided in Example 1 Figure 2 ;

[0022] Figure 3 Schematic diagram of the structure of the sampling device for the hemodialysis machine provided in Example 1 Figure 3 ;

[0023] Figure 4 A schematic diagram of the structure of a hemodialysis machine provided in Example 2;

[0024] In the figure: 100, sampling device for hemodialysis machine; 200, hemodialysis machine; 1, connecting tube body; 101, liquid circulation pipeline; 102, liquid outlet pipeline; 2, switching valve; 201, liquid inlet interface; 202, liquid discharge interface; 203, sampling interface; 3, dialysis machine body; 301, liquid circulation joint; 302, dialysis pipeline; 4, sample storage device; 401, bag body; 402, sampling tube; 403, syringe; 5, liquid discharge tube; 6, cover body; 7, flow regulating device. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The purpose of the utility model is to provide a sampling device for a hemodialysis machine and a hemodialysis machine to solve the problems existing in the above-mentioned prior art, which is simple to operate and is conducive to improving work efficiency; it can reduce the probability of false positives in sampled samples, thereby reducing economic losses.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Example

[0028] like Figure 1-3As shown, the utility model provides a sampling device 100 for a hemodialysis machine, comprising a connecting tube body 1 and a switching valve 2, wherein: the connecting tube body 1 comprises a liquid circulation pipeline 101 and a liquid outlet pipeline 102, the liquid outlet pipeline 102 is fixedly connected to the side wall of the liquid circulation pipeline 101, and the liquid outlet pipeline 102 is communicated with the liquid circulation pipeline 101, and the two circulation ports of the circulation pipeline are respectively used to be fixedly connected and communicated with the liquid circulation joint 301 of the dialysis machine body 3 and the dialysis pipeline 302, and the circulation port of the circulation pipeline is detachably fixedly connected to the liquid circulation joint 301; the switching valve 2 has a liquid inlet interface 201, a liquid discharge interface 202 and a sampling interface 203, the liquid inlet interface 201 is detachably fixedly connected and communicated with the liquid outlet of the liquid outlet pipeline 102, the liquid inlet interface 201 can be communicated with the liquid discharge interface 202 or the sampling interface 203, and the sampling interface 203 can be fixedly connected to the sample storage device 4. The liquid involved in dialysis circulates in the corresponding liquid circulation joint 301 and the corresponding dialysis pipeline 302 through the two circulation ports of the liquid circulation pipeline 101, and the liquid circulating in the liquid circulation pipeline 101 can be sampled through the switching valve 2 and the liquid outlet pipeline 102. When sampling, first switch the switching valve 2 to the liquid inlet interface 201 to communicate with the liquid discharge interface 202, so that the liquid accumulated in the channel between the inlet of the liquid outlet pipeline 102 and the switching valve 2 is discharged through the liquid discharge interface 202, and then switch the switching valve 2 to the liquid inlet interface 201 to communicate with the sampling interface 203 for sampling, which can reduce or avoid the probability of the sampled sample being mixed with the liquid with excessive toxins, thereby reducing the probability of false positives in the sampled sample. When sampling, it is only necessary to install the sample storage device 4 to the sampling interface 203 and switch the switching valve 2 to achieve sampling, which is convenient and quick. The circulation port of the circulation pipeline and the liquid circulation joint 301 can be disassembled. When disinfecting, the sampling device can be removed from the liquid circulation joint 301, so that the connecting tube body 1 is placed in the disinfection chamber of the hemodialysis machine 200 together with the dialysis pipeline 302 for disinfection, and there is no need to disinfect the connecting tube body 1 separately; the liquid inlet interface 201 and the liquid outlet of the liquid outlet pipeline 102 are detachably fixedly connected, so that the switching valve 2 can be easily removed. The switching valve 2 can be disposable and does not require additional disinfection, which can reduce the workload of disinfection and reduce the probability of false positive sampling samples due to contamination of the sampling device, thereby reducing economic losses.

[0029] In this embodiment, a sample storage device 4 is further included, and a liquid inlet of the sample storage device 4 is used for being detachably fixedly connected to the sampling interface 203 .

[0030] In this embodiment, a liquid discharge pipe 5 is further included, and a liquid inlet of the liquid discharge pipe 5 is used to be detachably fixedly connected to the liquid discharge interface 202 , so as to facilitate collection of the discharged liquid through the liquid discharge pipe 5 .

[0031] In this embodiment, a cover body 6 is further included, and the cover body 6 is used to be detachably fixedly connected to the sampling interface 203. In the non-sampling state, the sampling interface 203 is covered by the cover body 6, so that the sampling interface 203 and the internal channel of the switching valve 2 can be prevented from being contaminated, thereby reducing or avoiding the probability of sample contamination due to contamination of the sampling interface 203 or the internal channel of the switching valve 2.

[0032] In this embodiment, a flow regulating device 7 is also included. The flow regulating device 7 is connected to both the liquid outlet pipeline 102 and the sample storage device 4, and the flow regulating device 7 can regulate the flow of the liquid outlet pipeline 102 entering the sample storage device 4, thereby facilitating the control of the sampling amount.

[0033] As a preferred embodiment, the switching valve 2 is a three-way valve, and the flow regulating device 7 is integrated on the switching valve 2, that is, the three-way valve with flow regulating function is used to simultaneously realize the flow regulation of the sampling interface 203 and the switching function of the discharge interface 202 and the sampling interface 203. It should be noted that the three-way valve with flow regulating function is a prior art, such as the new flow regulating three-way valve provided by Chinese patent CN201720650741.3, and the structure and working principle of the three-way valve with flow regulating function are not described in detail here.

[0034] In this embodiment, the sample storage device 4 includes a sampling bag, and the sampling bag includes a bag body 401 and a sampling tube 402. The two ends of the sampling tube 402 are respectively connected and communicated with the sampling interface 203 and the inlet of the bag body 401. Preferably, the sampling bag is a sterile sampling bag, and more preferably, the sampling bag is a sterile non-pyrogenic sampling bag to avoid the sample being contaminated by the sampling bag; the sampling bag is a disposable item and does not need to be disinfected for secondary use, which reduces the disinfection workload. Compared with the syringe 403, the sampling bag has a larger capacity, which can conveniently extract large-volume samples and cooperate with the membrane filtration method for bacterial culture.

[0035] In this embodiment, the sample storage device 4 further includes a syringe 403, and the sampling interface 203 can be detachably connected to the inlet of the syringe 403 or the inlet of the sampling tube 402. The syringe 403 is mainly used for sampling small-volume samples.

[0036] As a preferred embodiment, the connecting pipe body 1 is a three-way pipe.

[0037] The diameters of the dialysate pipeline and the dialysis water (reverse osmosis water) supply pipe of hemodialysis machines 200 of different brands and models are basically the same. The connecting tube body 1 of the sampling device 100 for the hemodialysis machine can be adapted to both the dialysate pipeline and the dialysis water supply pipe, that is, it can be used for sampling both the dialysate and the dialysis water. Example

[0038] like Figure 4As shown, this embodiment provides a hemodialysis machine 200, including a liquid circulation joint 301, a dialysis pipeline 302 and the hemodialysis machine sampling device 100 in Example 1, and the two circulation ports of the circulation pipeline are respectively used to connect and communicate with the liquid circulation joint 301 and the dialysis pipeline 302. The hemodialysis machine 200 is easy to operate, which is conducive to improving work efficiency; it can reduce the probability of false positives in sampled samples, thereby reducing economic losses.

[0039] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A sampling device for a hemodialysis machine, characterized in that: It includes a connecting pipe body and a switching valve, wherein: The connecting pipe body comprises a liquid circulation pipeline and a liquid outlet pipeline, the liquid outlet pipeline is fixedly connected to the side wall of the liquid circulation pipeline, and the liquid outlet pipeline is communicated with the liquid circulation pipeline, the two circulation ports of the circulation pipeline are respectively used to be fixedly connected and communicated with the liquid circulation joint of the dialysis machine body and the dialysis pipeline, and the circulation port of the circulation pipeline is detachably fixedly connected to the liquid circulation joint; The switching valve has a liquid inlet interface, a liquid discharge interface and a sampling interface. The liquid inlet interface can be detachably fixedly connected and communicated with the liquid outlet of the liquid outlet pipeline. The liquid inlet interface can be communicated with the liquid discharge interface or the sampling interface, and the sampling interface can be fixedly connected to a sample storage device.

2. The sampling device for hemodialysis machine according to claim 1, characterized in that: The sample storage device is also included, and the liquid inlet of the sample storage device is used to be detachably fixedly connected to the sampling interface.

3. The sampling device for hemodialysis machine according to claim 1, characterized in that: It also includes a liquid discharge pipe, the liquid inlet of which is used to be detachably fixedly connected to the liquid discharge interface.

4. The sampling device for hemodialysis machine according to claim 2, characterized in that: It also includes a cover body, which is used to be detachably fixedly connected to the sampling interface.

5. The sampling device for hemodialysis machine according to claim 2, characterized in that: It also includes a flow regulating device, which is connected to both the liquid outlet pipeline and the sample storage device, and can regulate the flow of the liquid outlet pipeline entering the sample storage device.

6. The sampling device for hemodialysis machine according to claim 2, characterized in that: The sample storage device comprises a sampling bag, and the sampling bag comprises a bag body and a sampling tube. Two ends of the sampling tube are respectively fixedly connected and communicated with the sampling interface and the inlet of the bag body.

7. The sampling device for hemodialysis machine according to claim 6, characterized in that: The sample storage device further includes a syringe, and the sampling interface can be detachably connected to an inlet of the syringe or an inlet of the sampling tube.

8. A hemodialysis machine, characterized in that: It comprises a liquid circulation joint, a dialysis pipeline and a sampling device for a hemodialysis machine as described in any one of claims 1 to 7, wherein the two circulation ports of the circulation pipeline are respectively used to connect and communicate with the liquid circulation joint and the dialysis pipeline.

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