A blood volume monitoring device for a hemodialysis machine

Abstract

The utility model discloses a kind of blood volume monitoring devices for hemodialysis instrument, including the lid body of shell top movable connection, and the pipeline between lid body and shell, the inside of the shell is equipped with the photoelectric detection module of monitoring blood volume in pipeline, the heat conduction block of monitoring blood temperature, control circuit board below photoelectric detection module and heat conduction block, the control circuit board is connected with external power supply, the pipeline is sequentially transversely through the top of photoelectric detection module and heat conduction block, temperature sensor in photoelectric detection module is equipped with monitoring module temperature. Realize the simultaneous detection of blood volume and blood temperature, improve detection accuracy.

Description

Technical Field

[0001] This utility model relates to the field of hemodialysis purification technology, specifically to a blood volume monitoring device for a hemodialysis machine. Background Technology

[0002] The core function of blood volume monitoring is to monitor changes in the relative blood volume of patients during dialysis in real time, which can prevent hypotension during dialysis. During dialysis, water and toxins are removed from the blood, reducing blood volume. If dehydration occurs too quickly or in excessive amounts, exceeding the body's compensatory capacity, and if the water in the interstitial spaces is not replenished back into the blood vessels in time, it will lead to insufficient effective circulating blood volume, causing a sudden and dangerous drop in blood pressure.

[0003] When using optical detection methods, existing methods can only monitor blood volume, without monitoring the temperature of the blood passing through the tubing or the photoelectric detection module itself. The photoelectric detection module is greatly affected by temperature, resulting in inaccurate relative volume data. At the same time, the function is relatively limited, increasing the installation time of the tubing in the device and reducing work efficiency.

[0004] Therefore, this application is submitted. Utility Model Content

[0005] The purpose of this invention is to provide a blood volume monitoring device for a hemodialysis machine. By arranging photoelectric detection modules and heat-conducting blocks side by side with spacing inside the housing, it can monitor blood volume and the temperature of the modules and blood simultaneously. It is easy to open and close, install pipelines, and improve work efficiency.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following solution: A blood volume monitoring device for a hemodialysis machine includes a cover movably connected to the top of a housing, and a pipeline located between the cover and the housing. Inside the housing, a photoelectric detection module for monitoring blood volume within the pipeline, a heat-conducting block for monitoring blood temperature, and a control circuit board located below the photoelectric detection module and the heat-conducting block are arranged side by side. The control circuit board is connected to an external power supply. The pipeline passes laterally through the top of the photoelectric detection module and the heat-conducting block in sequence. The photoelectric detection module contains a temperature sensor for monitoring the module temperature.

[0007] Furthermore, the top of the housing is provided with assembly slot one and assembly slot two, the mounting bracket of the photoelectric detection module is located in assembly slot one, and the heat-conducting block is located in assembly slot two.

[0008] Furthermore, the first assembly slot and the second assembly slot are spaced apart and are respectively adapted to the mounting bracket and the heat-conducting block.

[0009] Furthermore, the top of the housing, the mounting bracket, and the heat-conducting block are all provided with U-shaped grooves for supporting the bottom of the pipeline, and the bottom of the cover is provided with a mounting groove corresponding to the U-shaped groove, which is used to limit the top of the pipeline.

[0010] Furthermore, the photoelectric detection module also includes a light-emitting element and a photosensitive element that pass through both sides of the mounting frame in sequence, and the two are arranged symmetrically. The temperature sensor is located in the mounting frame near the light-emitting element or the photosensitive element.

[0011] Furthermore, an optoelectronic circuit board electrically connected to the control circuit board is disposed below the mounting bracket.

[0012] Furthermore, a thermistor is provided inside the heat-conducting block.

[0013] Furthermore, one side of the cover is provided with a positioning protrusion located on the top side of the housing and connected by a pin.

[0014] Furthermore, an assembly groove three is provided on one side of the cover body that is symmetrical to the positioning protrusion, and the top end of the movable buckle provided on the top side of the cover body is engaged in the assembly groove three.

[0015] Furthermore, the bottom plate of the housing is detachably connected to a clamping bracket, and the clamping bracket is provided with a limiting groove for assembling the infusion rod.

[0016] The beneficial effects of this utility model are: In this invention, the detection device has a simple structure and is easy to install with pipelines. By arranging the photoelectric detection module and the conductive block side by side in the housing, it can simultaneously detect blood volume and blood temperature. The mounting frame is equipped with a temperature sensor close to the light-emitting element and the photosensitive element, which is used to monitor in real time whether the temperature inside the photoelectric detection module is higher than the maximum temperature that can be tolerated, thereby avoiding interference of the blood volume data in this part with the blood volume data at normal temperature and improving the detection accuracy. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model when it is opened; Figure 3 This is a three-dimensional structural diagram of the shell of this utility model; Figure 4 This is a schematic diagram of the structure of the photoelectric detection module, heat-conducting block, and control circuit board of this utility model.

[0018] Reference numerals: 1-Cover, 10-Positioning protrusion, 11-Assembly slot three, 12-Mounting slot, 2-Shell, 20-Assembly slot one, 21-Assembly slot two, 3-Modible buckle, 4-Photoelectric detection module, 40-Mounting bracket, 41-Photosensitive element, 42-Light-emitting element, 43-Photoelectric circuit board, 44-Temperature sensor, 5-U-shaped groove, 6-Control circuit board, 7-Heat-conducting block, 8-Clamping bracket, 9-Pipeline. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0020] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Example 1 Embodiment 1 of this utility model is a blood volume monitoring device for a hemodialysis machine, including a cover 1 movably connected to the top of a housing 2, and a pipe 9 located between the cover 1 and the housing 2. Inside the housing 2, a photoelectric detection module 4 for monitoring blood volume in the pipe 9, a heat-conducting block 7 for monitoring blood temperature, and a control circuit board 6 located below the photoelectric detection module 4 and the heat-conducting block 7 are arranged side by side. The control circuit board 6 is connected to an external power supply. The pipe 9 passes horizontally through the top of the photoelectric detection module 4 and the heat-conducting block 7 in sequence. The photoelectric detection module 4 is equipped with a temperature sensor 44 for monitoring the module temperature.

[0023] Reference Figure 1 and Figure 2This invention incorporates a photoelectric detection module 4 and a heat-conducting block 7 inside the housing 2, placing the hemodialysis tubing 9 between the housing 2 and the cover 1. The cover 1 is connected to the housing 2 via an openable / closing mechanism, allowing the housing 2 to be opened or closed, thus facilitating the placement and removal of the tubing 9. When blood in the tubing 9 passes through the photoelectric detection module 4 and the heat-conducting block 7, the relative blood volume and the temperature value at which it passes through the heat-conducting block 7 are determined based on the depth of the blood's color. The photoelectric detection module 4 and the heat-conducting block 7 are primarily detected by a control circuit board 6 connected to an external power source, which is existing technology and will not be described in detail here.

[0024] In some preferred embodiments, the top of the housing 2 is provided with a first assembly slot 20 and a second assembly slot 21. The mounting bracket 40 of the photoelectric detection module 4 is located in the first assembly slot 20, and the heat-conducting block 7 is located in the second assembly slot. The first assembly slot 20 and the second assembly slot 21 form two chambers inside the housing 2 for installing the photoelectric detection module 4 and the heat-conducting block 7. The first assembly slot 20 provides installation space for the mounting bracket 40, and the second assembly slot 21 provides installation space for the heat-conducting block 7. They can be detachably assembled inside the housing 2 using screws to firmly confine the mounting bracket 40 and the heat-conducting block 7 to the surface of the housing 2, preventing movement during the detection process and affecting the accuracy of the detection results.

[0025] Furthermore, the assembly slots 20 and 21 are spaced apart and are respectively adapted to the mounting bracket 40 and the heat-conducting block 7. The mounting bracket 40 and the heat-conducting block 7 are arranged side-by-side with a gap. Since the detection components installed in the mounting bracket 40 will generate heat during long-term use, this gap prevents the module's excessive temperature from affecting the blood temperature monitored by the heat-conducting block 7. The gap can be set according to the specifications of the actual housing 2, and will not be listed here.

[0026] In some preferred embodiments, the top of the housing 2, the mounting bracket 40, and the heat-conducting block 7 are all provided with U-shaped grooves 5 for supporting the bottom of the pipe 9, and the bottom of the cover 1 is provided with a mounting groove 12 corresponding to the U-shaped groove 5. The mounting groove 12 is used to limit the top of the pipe 9. The reason for providing U-shaped grooves 5 in all the above components is to facilitate the placement of the pipe 9. The arc segment at the bottom of the U-shaped groove 5 and the arc segment at the top of the mounting groove 12 interact to engage the pipe 9, making the pipe 9 firmly installed at this location and preventing positional movement during the testing process from affecting the results.

[0027] Reference Figure 4 The photoelectric detection module 4 also includes a light-emitting element 42 and a photosensitive element 41 that pass through both sides of the mounting frame 40 in sequence, and the two are arranged symmetrically. The temperature sensor 44 is located in the mounting frame 40 near the light-emitting element 42 or the photosensitive element 41.

[0028] Specifically, the light-emitting element 42, typically a light-emitting diode (LED), emits light of a specific wavelength. Infrared or near-infrared light, such as 805nm, is usually chosen. In this wavelength range, the difference in light absorption between oxyhemoglobin and deoxyhemoglobin is minimal, making the measurement results almost unaffected by changes in blood oxygen levels, thus more accurately reflecting blood cell concentration. The light emitted by the light-emitting element 42 penetrates the blood in the conduit 9. A photosensitive element 41, symmetrically positioned opposite the light-emitting element 42, receives the penetrated light and converts it into an electrical signal. The stronger the light, the stronger the current; the weaker the light, the weaker the current. The existing processor reads the electrical signal within the photosensitive element 41 and calculates the blood volume reading. This is prior art and will not be elaborated upon here.

[0029] Furthermore, during the long-term operation of the light-emitting element 42 and the photosensitive element 41, the temperature inside the photoelectric detection module 4 is continuously analyzed to determine whether the temperature exceeds the maximum temperature that the light-emitting element 42 and the photosensitive element 41 can withstand, thereby avoiding interference between the blood volume data of this part and the blood volume data at normal temperature.

[0030] Below the mounting bracket 40, a photoelectric circuit board 43 electrically connected to the control circuit board 6 is disposed. A thermistor is installed within the heat-conducting block 7. The photoelectric circuit board 43 converts the light signal from the photosensitive element 41 into a current signal. The thermistor is mainly used to detect the blood temperature in the tubing 9 carried within the heat-conducting block 7; both are existing technologies and will not be described in detail here.

[0031] In some preferred embodiments, one side of the cover 1 is provided with a positioning protrusion 10 located on the top side of the housing 2 and connected by a pin. The cover 1 is provided with an assembly groove 3 11 on the side opposite to the positioning protrusion 10, and the top end of the movable buckle 3 provided on the top side of the cover 1 is engaged in the assembly groove 3 11.

[0032] In the cover 1, the positioning protrusion 10 is mainly connected to the housing 2 by a pin for opening and closing. After the cover 1 is closed, the right side is provided with an assembly groove 3 11, and the matching side of the housing 2 is provided with a movable buckle 3. The movable buckle 3 is connected by a pin, and its top end is engaged in the assembly groove 3 to limit the position of the cover 1 on the housing 2. The movable buckle 3 and the limiting means are conventional technical operations and will not be described in detail here.

[0033] Meanwhile, the bottom plate of the housing 2 is detachably connected to a clamping bracket 8, which is provided with a limiting groove for assembling the infusion rod. This limiting groove has an arc-shaped section that can be used to place the rod body of the infusion rod, which can then be locked in place by a locking screw.

[0034] The working principle of this utility model is as follows: In use, the entire detection device is installed by clamping bracket 8, the movable buckle 3 is opened to separate the cover 1 from the shell 2, the tubing 9 in the dialyzer is placed in the U-shaped groove 5, the cover 1 and the movable buckle 3 are closed, and when the blood is transported in the tubing 9, when the blood in the tubing 9 passes through the photoelectric detection module 4 and the heat-conducting block 7, the light-emitting element 42 and the photosensitive element 41 cooperate to determine the relative blood volume based on the color depth of the blood and the temperature value of the heat-conducting block 7 for detection; at the same time, the mounting bracket 40 is equipped with a temperature sensor 44 near the light-emitting element 42 and the photosensitive element 41, which is used to monitor in real time whether the temperature inside the photoelectric detection module 4 is higher than the maximum temperature that can be tolerated, thereby avoiding interference of the blood volume data in this part with the blood volume data at normal temperature and improving the detection accuracy.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments based on the technical essence of the present utility model and within the spirit and principles of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A blood volume monitoring device for a hemodialysis machine, characterized in that, The device includes a cover (1) movably connected to the top of the housing (2), and a pipe (9) located between the cover (1) and the housing (2). Inside the housing (2), there are a photoelectric detection module (4) for monitoring blood volume in the pipe (9), a heat-conducting block (7) for monitoring blood temperature, and a control circuit board (6) located below the photoelectric detection module (4) and the heat-conducting block (7). The control circuit board (6) is connected to an external power supply. The pipe (9) passes horizontally through the top of the photoelectric detection module (4) and the heat-conducting block (7) in sequence. The photoelectric detection module (4) is equipped with a temperature sensor (44) for monitoring the module temperature.

2. The blood volume monitoring device for a hemodialysis machine according to claim 1, characterized in that, The top of the housing (2) is provided with assembly slot one (20) and assembly slot two (21). The mounting bracket (40) of the photoelectric detection module (4) is located in assembly slot one (20), and the heat-conducting block (7) is located in the assembly slot.

3. A blood volume monitoring device for a hemodialysis machine according to claim 2, characterized in that, The assembly slot one (20) and assembly slot two (21) are spaced apart and are respectively adapted to the mounting bracket (40) and the heat-conducting block (7).

4. A blood volume monitoring device for a hemodialysis machine according to claim 2, characterized in that, The top of the housing (2), the mounting bracket (40), and the heat-conducting block (7) are all provided with U-shaped grooves (5) for supporting the bottom of the pipeline (9). The bottom of the cover (1) is provided with a mounting groove (12) corresponding to the U-shaped groove (5). The mounting groove (12) is used to limit the top of the pipeline (9).

5. A blood volume monitoring device for a hemodialysis machine according to claim 2, characterized in that, The photoelectric detection module (4) also includes a light-emitting element (42) and a photosensitive element (41) that pass through both sides of the mounting frame (40) in sequence, and the two are arranged symmetrically. The temperature sensor (44) is located in the mounting frame (40) near the light-emitting element (42) or the photosensitive element (41).

6. A blood volume monitoring device for a hemodialysis machine according to claim 2, characterized in that, Below the mounting bracket (40) is a photoelectric circuit board (43) electrically connected to the control circuit board (6).

7. A blood volume monitoring device for a hemodialysis machine according to claim 2, characterized in that, The heat-conducting block (7) is equipped with a thermistor.

8. A blood volume monitoring device for a hemodialysis machine according to claim 2, characterized in that, The cover (1) has a positioning protrusion (10) on one side located on the top side of the shell (2) and is connected by a pin.

9. A blood volume monitoring device for a hemodialysis machine according to claim 7, characterized in that, The cover (1) has an assembly groove three (11) on one side symmetrical to the positioning protrusion (10), and the top of the movable buckle (3) on the top side of the cover (1) is engaged in the assembly groove three (11).

10. A blood volume monitoring device for a hemodialysis machine according to claim 7, characterized in that, The bottom plate of the housing (2) is detachably connected to a clamping bracket (8), and the clamping bracket (8) is provided with a limiting groove for assembling the infusion rod.

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