Dialysis machine blood volume monitoring device

Abstract

The utility model belongs to hemodialysis machine technical field, especially is a kind of dialysis machine blood volume monitoring device. Including sealing upper cover, sealing lower cover, fixing device and detection device, sealing upper cover is connected with sealing lower cover rotation, and sealing upper cover is equipped with the accommodation cavity between sealing lower cover, and sealing lower cover is provided with lower cover accommodating block, and lower cover accommodating block is arranged in accommodation cavity, and lower cover accommodating block is equipped with accommodation groove, and sealing upper cover is provided with upper cover fixed block, and upper cover fixed block is matched with accommodation groove and forms the passage of dialysis machine extracorporeal circulation pipeline, and lower cover accommodating block is provided with lower cover light hole, and lower cover light hole is communicated with accommodation groove, and detection device is set in the both sides of lower cover light hole by fixing device. The utility model is formed in the sealed accommodation cavity between sealing lower cover and sealing upper cover, and the passage of fixed dialysis machine extracorporeal circulation pipeline is arranged, and detection device carries out monitoring to the blood volume in pipeline through lower cover light hole, and plays the role of protecting patient.

Description

Technical Field

[0001] This utility model belongs to the field of hemodialysis machine technology, and in particular to a blood volume monitoring device for dialysis machines. Background Technology

[0002] Hemodialysis involves drawing a patient's blood out of their body to remove pathogenic components and restore their blood to a healthy state. When using a dialysis machine, the machine draws the patient's blood into the extracorporeal circulation tubing and filters out excess fluid. Excessive fluid removal can lead to dialysis-induced hypotension, causing dizziness, nausea, and other symptoms. Therefore, it's crucial to prevent dialysis-induced hypotension. When this occurs, the patient's blood volume drops significantly compared to the initial volume at the start of dialysis. Monitoring changes in blood volume can help prevent dialysis-induced hypotension. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a monitoring device that can accurately detect changes in blood volume in dialysis machines in a closed environment.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: The blood volume monitoring device for dialysis machines includes a sealed upper cover, a sealed lower cover, a fixing device, and a detection device. The sealed upper cover and the sealed lower cover are rotatably connected, and a placement cavity is provided between the sealed upper cover and the sealed lower cover. A lower cover placement block is provided on the sealed lower cover and is placed in the placement cavity. A placement groove is provided on the lower cover placement block. An upper cover fixing block is provided on the sealed upper cover. The upper cover fixing block and the placement groove cooperate to form a channel for the extracorporeal circulation pipeline of the dialysis machine. A lower cover light-transmitting hole is provided on the lower cover mounting block and is connected to the placement groove. The detection device is set on both sides of the lower cover light-transmitting hole through the fixing device.

[0005] Preferably, the upper side of the sealing lower cover is provided with an upper plate, and the lower cover mounting block is provided on the lower side of the upper plate of the sealing lower cover. The lower cover mounting block is provided along the width direction of the sealing lower cover, and the mounting groove is a blind groove provided vertically at the connection between the lower cover mounting block and the upper plate.

[0006] Preferably, the fixing device is a fixing plate, with two fixing bosses on one side of the fixing plate, and a through groove between the two fixing bosses for the lower cover mounting block to pass through. A mounting groove is horizontally set on the fixing boss, and the mounting groove and the through groove are connected to form a light-transmitting hole in the fixing plate.

[0007] Preferably, the monitoring device includes a transmitting tube and a receiving tube, which are respectively installed in the mounting groove.

[0008] Preferably, the monitoring device also includes a signal acquisition board and a processor, wherein the signal acquisition board receives the signal and transmits it to the processor for analysis.

[0009] Preferably, the upper sealing cover and the lower sealing cover are rotatably connected by a pin.

[0010] Preferably, bolt holes are provided on the sealed lower cover, and the cover is installed on the outer casing of the dialysis machine by bolts.

[0011] Preferably, the upper sealing cover is provided with a buckle, and the lower sealing cover is provided with a fastening groove, with the buckle set in the fastening groove.

[0012] Preferably, the upper cover fixing block is arranged along the width direction of the sealing upper cover, and the bottom end of the upper cover fixing block is provided with an arc-shaped fixing groove.

[0013] Compared with existing technologies, the beneficial effects of this technical solution are:

[0014] This invention creates a sealed cavity between a lower and upper sealed cover. A lower cover mounting block is installed on the lower sealed cover and placed within the cavity. The lower cover mounting block has a mounting groove that cooperates with an upper cover fixing block on the upper sealed cover to form a channel for the extracorporeal circulation pipeline of the dialysis machine. A lower cover mounting block has a lower cover light-transmitting hole that communicates with the mounting groove. A detection device is fixed on both sides of the lower cover light-transmitting hole. The emitted detection signal penetrates the extracorporeal circulation pipeline of the dialysis machine through the lower cover light-transmitting hole to monitor the blood volume in the pipeline, thus protecting the patient. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of a blood volume monitoring device for a dialysis machine according to the present invention.

[0016] Figure 2 This is a bottom view of the sealing cover and fixing plate of this utility model.

[0017] Figure 3 This is a top view of the sealing lower cover of this utility model.

[0018] Figure 4 This is a bottom view of the sealing cover of this utility model.

[0019] Figure 5 This is a flowchart illustrating the process of this utility model.

[0020] Among them: 1. Sealed upper cover 101, upper cover fixing block 2. Sealed lower cover 201, placement groove 202, lower cover light transmission hole 203, positioning post 204, placement cavity 205, lower cover placement block 3. Fixing plate 301, fixing boss 302, mounting groove 303, positioning hole 304, fixing plate light transmission hole 4. Transmitting tube 5. Receiving tube 6. Signal acquisition board 7. First processor 8. Bolt hole 9. Buckle 10. Fastening groove 11. Second processor 12. Dialysis machine 13. Dialysis machine extracorporeal circulation pipeline. Detailed Implementation

[0021] Figures 1-5 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figures 1-5 The present invention will be further described below.

[0022] Example 1:

[0023] Reference Figures 1-4 The blood volume monitoring device for the dialysis machine includes a sealed upper cover 1, a sealed lower cover 2, a fixing device, and a detection device. The sealed upper cover 1 and the sealed lower cover 2 are rotatably connected. The sealed lower cover 2 is provided with a placement cavity 204 and a lower cover placement block 205. The lower cover placement block 205 is placed in the placement cavity 204 and a placement groove 201 is provided on the lower cover placement block 205. The sealed upper cover 1 is provided with an upper cover fixing block 101. The upper cover fixing block 101 and the placement groove 201 cooperate to form a channel for the extracorporeal circulation pipeline 13 of the dialysis machine. The lower cover placement block 205 is provided with a lower cover light-transmitting hole 202, which is connected to the placement groove 201. The detection device is set on both sides of the lower cover light-transmitting hole 202 through the fixing device.

[0024] Specifically, in this embodiment, the sealing lower cover 2 is a cuboid, and the bottom side of the sealing lower cover 2 is recessed inward to form a placement cavity 204. The lower cover placement block 205 is formed by the upper plate of the sealing lower cover 2 protruding downward and outward, forming a vertical upper part and a semi-circular lower part. A placement groove 201 is provided on the upper side of the lower cover placement block 205. The placement groove 201 is located on the lower side of the upper plate of the sealing lower cover 2 and is set along the width direction of the sealing lower cover 2. The lower cover placement block 205 and the placement groove 201 are set along the width direction of the sealing lower cover 2. The extracorporeal circulation pipeline 13 of the dialysis machine is placed in the placement groove 201.

[0025] The sealing cover 1 is a cuboid with a cover fixing block 101 protruding downward from its bottom side. The cover fixing block 101 is vertical at the top and semi-circular at the bottom. The cover fixing block 101 is set along the width direction of the sealing cover 1, and its lower end is provided with an arc-shaped fixing groove, which together with the placement groove 201 forms a channel for the extracorporeal circulation pipeline 13 of the dialysis machine to pass through.

[0026] The fixing device is a fixing plate 3. The upper two sides of the fixing plate 3 protrude outward to form two cuboid fixing bosses 301. A through groove is formed between the two fixing bosses 301 for the lower cover mounting block 205 to pass through. A blind groove is set on the fixing bosses 301 in the horizontal direction as a mounting groove 302. The transmitting tube 4 and the receiving tube 5 are respectively set in the mounting groove 302. A fixing plate light-transmitting hole 304 is opened on the blind plate side of the mounting groove 302. At the position of the lower cover mounting block 205 corresponding to the fixing plate light-transmitting hole 304, a lower cover light-transmitting hole 202 is opened so that the light emitted by the transmitting tube 4 passes through the lower cover light-transmitting hole 202, then through the extracorporeal circulation pipeline 13 of the dialysis machine, is absorbed and attenuated by the hemoglobin in the blood in the pipeline, is received by the receiving tube 5, and then transmitted to the signal acquisition board 6.

[0027] The monitoring device also includes a signal acquisition board 6, a first processor 7, and a second processor 11. After receiving the signal, the signal acquisition board 6 transmits it to the first processor 7 for analysis. The second processor 11 is an RS485 processor that controls the entire circuit and is responsible for communicating with the dialysis machine 12 and the signal acquisition board 6 to obtain voltage signals. It processes the voltage signals to generate output. The transmitting tube 4 and the receiving tube 5 are responsible for generating infrared light and receiving infrared light, respectively.

[0028] Bolt holes 8 are provided at the four corners of the lower sealing cover 2, which is installed on the outer shell of the dialysis machine 12 by bolt embedding. The outer shell of the dialysis machine 12 has a through groove for installing the detection device. The placement cavity 204 faces the inner cavity of the dialysis machine 12. The upper sealing cover 1 protrudes from the outside of the dialysis machine 12 and is rotatably connected to the lower sealing cover 2 by a pin. The upper sealing cover 1 is provided with a buckle 9, and the lower sealing cover 2 is provided with a fastening groove 10. The upper sealing cover 1 covers the lower sealing cover 2, and the buckle 9 is engaged in the fastening groove 10, so that the upper sealing cover 1 is tightly fastened to the lower sealing cover 2, making the placement cavity 204 a sealed and dark space, making the monitoring results more accurate. In addition, the monitoring device moves with the dialysis machine 12, making it simple and convenient to use.

[0029] Reference Figure 5 The transmitting tube 4 is an LED emitter that emits infrared light. The receiving tube 5 receives the infrared light passing through the circulation tube 13 and transmits it to the signal acquisition board 6. The signal acquisition board 6 sends the voltage signal to the first processor 7 for analysis and calculation to obtain the blood volume value. The dialysis machine 12 sends an inquiry command to the second processor 11, which sends a signal to the first processor 7. The first processor 7 then transmits the analysis results to the dialysis machine 12, and this process repeats continuously.

[0030] Work process:

[0031] First, the extracorporeal circulation tubing 13 of the dialysis machine is fixed in the mounting slot 201 of the sealed lower cover 2, and then the sealed upper cover 1 is fastened. Then, the dialysis machine 12 starts treatment. Five minutes after the start of treatment, the blood volume monitoring device receives the instruction from the dialysis machine 12 and starts working. The transmitting tube 4 emits light with a constant brightness. The light passes through the light-transmitting hole 202 of the lower cover and is absorbed and attenuated by the hemoglobin in the blood. It reaches the receiving tube 5. The signal acquisition board 6 detects the voltage signal of the receiving tube 5 at 10Hz and sends it to the processor of the blood volume monitoring device for calculation to obtain the blood volume at the start of treatment and sends the result to the dialysis machine 12.

[0032] After a period of time, the dialysis machine 12 issues another instruction, and the blood volume monitoring device repeats the above process, calculates the blood volume at this time, and combines it with the blood volume calculation result from the previous calculation. It then performs mathematical calculations to obtain the blood volume relative to the start of treatment and sends it to the dialysis machine 12. When the blood volume is normal, the dialysis machine 12 works normally. When the blood volume is detected to be low, the dialysis machine 12 stops working.

[0033] Example 2:

[0034] The difference between this embodiment and embodiment one is that: in this embodiment, the cavity 204 is placed on the upper side of the sealed lower cover 2, the lower cover mounting block 205 is placed on the upper side of the upper plate of the sealed lower cover 2, and there are two fixing plates 3, which are fixed on both sides of the lower cover mounting block 205. Each fixing plate 3 is provided with a fixing boss 301 for installing the transmitting tube 4 and the receiving tube 5.

[0035] The cavity 204 can also be located on the sealed cover 1.

[0036] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A blood volume monitoring device for a dialysis machine, characterized in that: The device includes a sealing upper cover (1), a sealing lower cover (2), a fixing device, and a detection device. The sealing upper cover (1) and the sealing lower cover (2) are rotatably connected. A placement cavity (204) is provided between the sealing upper cover (1) and the sealing lower cover (2). A lower cover placement block (205) is provided on the sealing lower cover (2). The lower cover placement block (205) is located in the placement cavity (204). A placement groove (201) is provided on the lower cover placement block (205). An upper cover fixing block (101) is provided on the sealing upper cover (1). The upper cover fixing block (101) and the placement groove (201) cooperate to form a channel for the extracorporeal circulation pipeline (13) of the dialysis machine. A lower cover light-transmitting hole (202) is provided on the lower cover placement block (205). The lower cover light-transmitting hole (202) is connected to the placement groove (201). The detection device is set on both sides of the lower cover light-transmitting hole (202) through the fixing device.

2. The blood volume monitoring device for a dialysis machine according to claim 1, characterized in that: The sealing lower cover (2) is provided with an upper plate on its upper side, and the lower cover mounting block (205) is provided on the lower side of the upper plate of the sealing lower cover (2). The lower cover mounting block (205) is provided along the width direction of the sealing lower cover (2), and the mounting groove (201) is a blind groove provided vertically at the connection between the lower cover mounting block (205) and the upper plate.

3. The blood volume monitoring device for a dialysis machine according to claim 1, characterized in that: The fixing device is a fixing plate (3). Two fixing bosses (301) are provided on one side of the fixing plate (3). A through groove is formed between the two fixing bosses (301) for the lower cover mounting block (205) to pass through. An installation groove (302) is horizontally provided on the fixing bosses (301). The installation groove (302) and the through groove are connected to form a light-transmitting hole (304) of the fixing plate.

4. The blood volume monitoring device for a dialysis machine according to claim 3, characterized in that: The monitoring device includes a transmitting tube (4) and a receiving tube (5), which are respectively installed in the mounting slot (302).

5. A blood volume monitoring device for a dialysis machine according to claim 1, characterized in that: The upper cover fixing block (101) is arranged along the width direction of the sealing upper cover (1), and the bottom end of the upper cover fixing block (101) is provided with an arc-shaped fixing groove.

6. The blood volume monitoring device for a dialysis machine according to claim 1, characterized in that: The monitoring device also includes a signal acquisition board (6) and a processor. The signal acquisition board (6) receives the signal and transmits it to the processor for analysis.

7. A blood volume monitoring device for a dialysis machine according to claim 1, characterized in that: The sealing upper cover (1) and the sealing lower cover (2) are rotatably connected by a pin.

8. A blood volume monitoring device for a dialysis machine according to claim 1, characterized in that: The sealing lower cover (2) is provided with bolt holes (8) and is installed on the outer shell of the dialysis machine (12) by bolts.

9. A blood volume monitoring device for a dialysis machine according to claim 1, characterized in that: The sealing upper cover (1) is provided with a buckle (9), and the sealing lower cover (2) is provided with a fastening groove (10), with the buckle (9) located in the fastening groove (10).

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