Temperature measuring device and extracorporeal circulation system

Abstract

The utility model relates to the technical field of temperature measurement of extracorporeal circulation, particularly provides a temperature measurement device and an extracorporeal circulation system, and aims to solve some defects existing when an existing intrusive temperature measurement device is applied to a blood pipeline. To this end, the temperature measuring device of the present application comprises: a base, in which a channel penetrating through the base is arranged, the channel being used for a pipeline to pass through; the temperature sensor is arranged in the base and located around the channel so as to monitor the temperature of the peripheral wall of the pipeline. According to the temperature measuring device, an indirect measuring mode is adopted, the temperature of the liquid in the pipeline is obtained by measuring the temperature of the wall of the pipeline, operation is convenient and fast, interference of the measuring device on flowing of the liquid in the pipeline can be avoided, and cost is low.

Description

Technical Field

[0001] This application relates to the field of temperature measurement technology for extracorporeal circulation, specifically providing a temperature measuring device and an extracorporeal circulation system. Background Technology

[0002] Hypothermia is a treatment method used to manage human body temperature, primarily through targeted cooling technology. Specifically, hypothermia involves medical interventions to maintain body temperature between 32-34°C, thereby slowing metabolism and inflammatory responses, protecting organs and tissues from damage caused by ischemia and hypoxia. Hypothermia is widely used in brain resuscitation after cardiac arrest and in critical care treatment. Currently, targeted cooling technologies mainly include surface cooling, pharmacological cooling, and intravascular cooling. Compared to surface cooling and pharmacological cooling, intravascular cooling directly regulates blood temperature through an extracorporeal circulation heat exchange system, offering advantages such as rapid cooling rate and high temperature control precision.

[0003] An extracorporeal circulation heat exchange system typically consists of a blood pump, a heat exchanger, a temperature measuring device, and closed-loop tubing. Blood is drawn through a puncture in the femoral vein or internal jugular vein and, driven by the blood pump, is led through a blood outlet tubing to the heat exchanger. Subsequently, the heat exchanger uses a refrigerant to perform efficient convective heat exchange with the blood. Combined with real-time temperature feedback, precise temperature control is achieved. The cooled blood is then returned to the femoral artery or central vein through a blood inlet tubing, thus forming a closed-loop temperature control system.

[0004] During this process, the temperature measuring device obtains the initial and cooled blood temperatures by monitoring the temperatures in the blood outlet and inlet tubing, respectively. These two temperatures provide the basis for precise control of the heat exchange process. In some related technologies, the temperature measuring devices for these two tubings are typically invasive, meaning the temperature sensor is placed inside the tubing to measure the blood temperature. This method places extremely high demands on the manufacturing of the temperature sensor, as it comes into direct contact with the blood and must meet biocompatibility principles, often requiring the addition of special coatings to reduce adverse reactions with the blood. However, the invasive placement of the temperature sensor into the tubing can still affect normal blood flow, altering the blood flow pattern and easily creating localized eddies or stagnant zones. More seriously, this abnormal flow can easily lead to thrombosis in the extracorporeal circulation tubing, hindering normal blood circulation, reducing blood perfusion to vital organs, decreasing the efficiency of the extracorporeal circulation system, interfering with the treatment process, affecting treatment efficacy, and even posing additional health risks to the patient.

[0005] Therefore, a new technical solution is needed in this field to solve the above problems. Utility Model Content

[0006] This application aims to solve the aforementioned technical problems, namely, to address a series of drawbacks existing in invasive temperature measurement devices when applied to blood tubing. These devices have extremely high manufacturing requirements, and when placed in blood tubing, they can affect normal blood flow, easily leading to thrombosis, hindering normal blood circulation, interfering with treatment, and endangering the patient's health.

[0007] In a first aspect, this application provides a temperature measuring device, comprising:

[0008] A base having a through-hole for pipes to pass through;

[0009] A temperature sensor is disposed within the base and located around the channel to monitor the temperature of the outer peripheral wall of the pipe.

[0010] Optionally, it also includes:

[0011] A thermally conductive layer is disposed within the base and covers the outer peripheral wall. A temperature sensor is embedded within the thermally conductive layer to obtain the temperature of the outer peripheral wall by monitoring the temperature of the thermally conductive layer.

[0012] Optionally, the temperature measuring device further includes:

[0013] A heat insulation layer is disposed within the base and covers the outside of the heat-conducting layer.

[0014] Optionally, multiple temperature sensors are provided, and the multiple temperature sensors are spaced apart along the axial direction of the channel within the heat-conducting layer.

[0015] Optionally, multiple temperature sensors are provided, and the multiple temperature sensors are arranged at intervals along the circumference of the channel within the heat-conducting layer.

[0016] Optionally, the base includes a base body and a cover, and the heat insulation layer includes a first part and a second part that are independent of each other. The first part is disposed in the base body, and the second part is disposed in the cover. The channel is located in the first part, and the channel has an opening on the side facing the cover. When the cover is fastened, the second part can close the opening.

[0017] Optionally, the temperature measuring device further includes:

[0018] An elastic element is disposed within the channel, and the elastic element is used to press and fix the temperature sensor to the outer peripheral wall.

[0019] Optionally, two channels are provided, and the two channels are arranged side by side within the base.

[0020] In a second aspect, this application provides an extracorporeal circulation system, comprising:

[0021] A heat exchanger that cools blood entering it to a target temperature before outputting it, the heat exchanger including an input end and an output end;

[0022] The system includes a blood outlet tubing and a blood inlet tubing, wherein the blood outlet tubing is connected to the input end and the blood inlet tubing is connected to the output end.

[0023] The temperature measuring device as described in any one of the first aspects, wherein the blood outlet conduit or the blood inlet conduit passes through the channel;

[0024] A controller is communicatively connected to the temperature sensor, and the controller controls the operating state of the heat exchanger based on the detection value of the temperature sensor.

[0025] Optionally, two channels are provided, which are arranged side by side in the base, and the blood outlet tube and the blood inlet tube pass through the two channels respectively.

[0026] The temperature measuring device provided in this application employs an indirect measurement method, obtaining the temperature of the liquid inside the pipe by measuring the temperature of the pipe wall, exhibiting significant advantages in several aspects. For example, in terms of operation, it avoids the complex process of installing sensors inside the pipe, making measurement more convenient; in terms of safety, because it does not directly contact the liquid, it prevents interference with the liquid flow, especially when applied to blood temperature measurement, as it eliminates the need for special biocompatibility treatments, effectively reduces the risk of thrombosis, and greatly reduces the possibility of infection; in terms of cost, the temperature measuring device provided in this application is less expensive than sensors implanted inside the pipe. Attached Figure Description

[0027] The preferred embodiments of this application are described below with reference to the accompanying drawings, in which:

[0028] Figure 1 This is a schematic diagram of the structure of a temperature measuring device according to an embodiment of this application;

[0029] Figure 2 This is a cross-sectional structural schematic diagram of a temperature measuring device according to an embodiment of this application;

[0030] Figure 3 This is a cross-sectional structural schematic diagram of a temperature measuring device according to another embodiment of this application;

[0031] Figure 4 This is a schematic diagram of the structure of an extracorporeal circulation system according to an embodiment of this application.

[0032] List of reference numerals in the attached diagram:

[0033] 1-Temperature measuring device, 11-Base, 111-Base body, 112-Cover, 113-Snap, 10-Channel, 101-First channel, 102-Second channel, 12-Temperature sensor, 13-Heat-conducting layer, 14-Heat-insulating layer, 141-First part, 142-Second part;

[0034] 21-Heat exchanger, 22-Blood outlet tubing, 23-Blood inlet tubing. Detailed Implementation

[0035] Preferred embodiments of this application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this application and are not intended to limit the scope of protection of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0036] It should be noted that in the description of this application, terms such as "upper," "lower," "left," "right," "inner," and "outer," which indicate direction or positional relationship, are based on the direction or positional relationship shown in the accompanying drawings. These terms are used merely for ease of description and do not indicate or imply that the relevant device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, ordinal numbers such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] In the field of hypothermia therapy, temperature measurement of extracorporeal circulation tubing is mostly done using invasive methods, which involves placing temperature sensors directly inside the blood outflow and blood inflow tubing to obtain the temperature of the blood in the tubing.

[0039] Because temperature sensors need to come into direct contact with blood, they must meet biocompatibility requirements. Furthermore, to reduce potential adverse reactions between the sensor and blood, special coatings are often added. Therefore, invasive temperature measurement methods place extremely high demands on sensor manufacturing. However, even with these measures, immersing the temperature sensor inside the tubing can still negatively impact normal blood flow. For example, it can affect the flow pattern of blood within the tubing, potentially creating localized blood eddies or stagnant areas. More seriously, abnormal blood flow can easily lead to thrombus formation in the extracorporeal circulation tubing. Once a thrombus forms, it obstructs normal blood circulation, reducing blood perfusion to vital organs. This not only reduces the efficiency of the extracorporeal circulation system but also severely interferes with the entire treatment process, directly affecting treatment outcomes and potentially posing additional health risks to the patient.

[0040] In view of the problems existing in the background art, this application proposes a temperature measuring device 1. This device aims to indirectly obtain the temperature of the medium inside the pipeline, such as blood, by measuring the temperature of the outer peripheral wall of the pipeline.

[0041] Please refer to Figure 1-3 A temperature measuring device 1 according to an embodiment of the present application includes a base 11 and a temperature sensor 12 disposed in the base 11.

[0042] Specifically, the base 11 has a through-channel 10 through which the pipeline requiring temperature measurement passes. Temperature sensors 12 are arranged around the channel 10 to enable more effective monitoring of the pipeline temperature.

[0043] In one implementation, the temperature sensor 12 is installed inside the base 11 near the channel wall.

[0044] In another implementation, the temperature sensor 12 is tightly adhered to the outer wall of the pipe using a thermally conductive adhesive with good thermal conductivity and adhesion. The thermally conductive adhesive ensures good heat transfer between the sensor and the pipe wall, reducing measurement errors. Additionally, to prevent the temperature sensor 12 from falling off, elastic elements or cable ties can be used to reinforce the sensor.

[0045] The temperature measuring device 1 in this embodiment employs an indirect measurement method, obtaining the temperature of the liquid inside the pipe by measuring the temperature of the pipe wall, exhibiting significant advantages in several aspects. For example, in terms of operation, it avoids the complex process of installing sensors inside the pipe, making measurement more convenient; in terms of safety, because it does not directly contact the liquid, it prevents interference with the liquid flow, especially when applied to blood temperature measurement, as it eliminates the need for special biocompatibility treatments, effectively reduces the risk of thrombosis, and greatly reduces the possibility of infection; in terms of cost, the temperature measuring device 1 provided in this embodiment is less expensive than sensors that are implanted inside the pipe.

[0046] In one embodiment, reference Figure 1 and Figure 2 The base 11 adopts a structure consisting of a base body 111 and a cover 112 that is fastened to the base body 111, so that the opening and closing of the channel 10 can be achieved through the opening and closing operation of the cover 112.

[0047] Furthermore, the base body 111 and the cover 112 can be locked together by a snap-fit ​​113. This locking method improves the stability of the connection between the cover 112 and the base body 111.

[0048] In one implementation, the channel 10 is structured as follows: one part is located inside the base body 111, and the other part is located inside the cover 112. When the cover 112 is engaged with the base body 111, the two parts of the channel 10 are connected to each other to form a complete and enclosed channel 10 space.

[0049] In another implementation, refer to Figure 2 Its cross-sectional shape is a combination of arc and rectangle. Specifically, the lower part of the channel 10 cross-section is an arc-shaped structure, which can achieve a tight fit with the pipe. The temperature sensor 12 is placed near the arc-shaped structure to better obtain the temperature of the outer wall of the pipe. The upper part of the channel 10 cross-section is a rectangular structure, with an opening on the side of the rectangular structure facing the cover 112. The shape of the rectangular opening makes it easier for the pipe to be embedded into the channel 10. When the cover 112 is fastened to the base body 111, the cover 112 can cover and close the opening, thereby forming a closed space for the channel 10.

[0050] The openable design of the base 11 and channel 10 greatly enhances the ease of operation. For tubing that is already connected to other components, such as the blood inlet and outlet tubing in an extracorporeal circulation system, simply opening the cover 112 allows the tubing to be easily inserted into the channel 10, avoiding the difficulty of inserting tubing caused by the traditional closed channel 10.

[0051] In one embodiment, to improve the accuracy and response speed of pipeline temperature detection, a heat-conducting layer 13 is added inside the channel 10 of the base 11. This heat-conducting layer 13 is tightly fitted to the outer wall of the pipeline, and the temperature sensor 12 is embedded inside the heat-conducting layer 13. The heat from the medium inside the pipeline is conducted to the heat-conducting layer 13 through the pipeline wall. The efficient heat conduction characteristics of the heat-conducting layer 13 can quickly transmit temperature changes to the sensor. The temperature sensor 12 indirectly obtains the temperature of the medium inside the pipeline by monitoring the temperature of the heat-conducting layer 13 in real time, thereby reducing temperature measurement lag and improving data accuracy.

[0052] Furthermore, during the measurement of the temperature of the medium within the pipeline, considering the flow characteristics of the medium, its flow is often non-uniform. In this case, if the overall temperature of the medium within the pipeline is inferred solely from the temperature of a local outer wall, a large measurement error is likely to occur, because the temperature of a local outer wall cannot comprehensively and accurately reflect the overall thermal state of the medium. Therefore, embedding the temperature sensor 12 into the heat-conducting layer 13 surrounding the outer wall of the pipeline allows the heat-conducting layer 13 to conduct heat from the medium within the pipeline more uniformly, making the temperature data acquired by the temperature sensor 12 closer to the true overall temperature of the medium within the pipeline, thereby significantly improving the accuracy of temperature measurement.

[0053] The material of the heat-conducting layer 13 can be varied, and it can be either a metal or a thermally conductive ceramic. For example, the heat-conducting layer 13 can be made of copper or steel, which have good thermal conductivity, or it can be made of thermally conductive ceramic, which also has good thermal conductivity.

[0054] Considering the compatibility between the heat-conducting layer 13 and the channel 10, the heat-conducting layer 13 has two structural forms: a semi-enclosed type and a fully enclosed type.

[0055] refer to Figure 2 The heat-conducting layer 13 has a semi-enclosed structure. Specifically, the heat-conducting layer 13 is designed in the form of a heat-conducting base, with an arc-shaped groove on the side of the heat-conducting base facing the cover 112. The arc-shaped groove design provides convenience and stability for pipe installation, and the pipe can be directly embedded into the channel 10 of the base 11 along the arc-shaped groove.

[0056] refer to Figure 3 The heat-conducting layer 13 has a fully enclosed structure. Specifically, the fully enclosed heat-conducting layer 13 is divided into upper and lower parts, which are respectively embedded in the channels 10 of the base body 111 and the cover 112. When the cover 112 is closed, the upper and lower heat-conducting layers 13 are tightly attached to the outer peripheral wall of the pipeline, forming a 360° all-round heat conduction path.

[0057] To further improve the accuracy of temperature detection, multiple temperature sensors 12 are embedded in the thermal conductive layer 13, aiming to improve detection accuracy through multi-point temperature measurement.

[0058] In one implementation, multiple temperature sensors 12 are distributed at intervals along the axial direction of the channel 10. By synchronously measuring the temperature at multiple points along the axial direction, the temperature distribution of the medium in the pipeline in the axial direction can be captured in real time. Because the medium in the pipeline is affected by various factors, the axial temperature is not uniform. A single sensor can only measure the temperature at one point. However, by synchronously measuring the temperature at multiple points along the axial direction and performing weighted averaging or algorithm filtering on the measured values ​​of multiple sensors, if one sensor fails due to damage or poor contact, the remaining temperature sensors 12 can still maintain basic temperature measurement functions.

[0059] Another implementation method involves multiple temperature sensors 12 spaced circumferentially along the channel 10. By synchronously measuring multiple points circumferentially, temperature information at different locations around the circumference of the pipeline can be obtained. The measured values ​​of multiple sensors are then weighted and averaged or filtered by an algorithm. If a sensor fails due to damage or poor contact, the remaining temperature sensors 12 can still maintain basic temperature measurement functions, thus avoiding errors in overall temperature judgment caused by local circumferential temperature measurement deviations.

[0060] Of course, axial and circumferential distribution can also be combined to build a comprehensive and three-dimensional temperature monitoring network, which can fully and accurately obtain the temperature information of the medium in the pipeline, minimize measurement errors, and provide a data foundation for the precise control of the system.

[0061] In one embodiment, in order to reduce the dissipation of heat from the medium in the pipeline and at the same time reduce the interference of external environmental factors on temperature measurement and further improve the accuracy of measurement, a heat insulation layer 14 is also wrapped around the heat-conducting layer 13.

[0062] Specifically, refer to Figure 2 and Figure 3 The heat insulation layer 14 is divided into two independent parts: a first part 141 and a second part 142. The first part 141 is disposed inside the base body 111, and the second part 142 is disposed inside the cover 112. When the cover 112 is fastened onto the base body 111, the second part 142 of the heat insulation layer 14 located inside the cover 112 can precisely seal the opening of the channel 10. In this embodiment, the heat insulation layer 14 is preferably thermal insulation cotton.

[0063] In one embodiment, the temperature monitoring device provides at least two channels 10 through which the pipeline passes, so that the temperature measuring device 1 can monitor the temperature of multiple pipelines simultaneously.

[0064] This embodiment also provides an extracorporeal circulation system, which includes the temperature measuring device 1 as described above.

[0065] refer to Figure 4An extracorporeal circulation system typically consists of a blood pump, a heat exchanger 21, a temperature measuring device 1, and closed-loop tubing. The specific blood extraction and circulation process during extracorporeal circulation is as follows: Blood is extracted from the patient's body using femoral vein or internal jugular vein puncture techniques. Subsequently, driven by the blood pump, the blood is transported along the blood extraction tubing 22 to the heat exchanger 21.

[0066] The heat exchanger 21 can adjust the temperature of the incoming blood in real time and with precision. When the blood enters the heat exchanger 21 through the blood outlet pipe 22, the heat exchanger 21 will gradually reduce the temperature of the blood through a highly efficient heat exchange process with the refrigerant or other heat exchange medium, according to the preset target temperature.

[0067] During the heat exchange process, the heat exchanger 21 uses a refrigerant such as cooling water to efficiently exchange heat with the blood via convection. The controller adjusts the operating state of the heat exchanger 21 based on real-time temperature feedback to achieve precise temperature control and ensure that the blood temperature accurately reaches the preset target temperature range. Once the blood temperature reaches the target temperature, the heat exchanger 21 discharges the processed blood through its output end, which is tightly connected to the blood inlet tube 23. The cooled blood is then returned to the patient's body through the blood inlet tube 23, thus completing the blood temperature regulation process in the entire extracorporeal circulation.

[0068] Furthermore, the blood outlet tube 22 and the blood inlet tube 23 are respectively embedded in the first channel 101 and the second channel 102 of the temperature measuring device 1. The temperature measuring device 1 can acquire the initial temperature of the blood in the blood outlet tube 22 and the temperature of the blood in the blood inlet tube 23 after being cooled by the heat exchanger 21 in real time.

[0069] In the heat exchange process of the extracorporeal circulation system, these two temperature data points are extremely important, serving as the foundation for precise control of the heat exchange process. By simultaneously monitoring the temperatures of the two pipelines, the temperature measuring device 1 can more conveniently and efficiently obtain the temperature difference of the blood before and after heat exchange. This temperature difference data is crucial feedback information for the control system of the heat exchanger 21. Based on the real-time acquired initial temperature, post-cooling temperature, and the temperature difference between the two, the controller can precisely adjust the operating parameters of the heat exchanger 21, such as the refrigerant flow rate and temperature, to ensure that the blood can be accurately cooled to the preset target temperature. This achieves fine control of the entire heat exchange process, improving the safety and effectiveness of the extracorporeal circulation system.

[0070] In related technologies, the traditional method of temperature measurement involves placing a temperature sensor 12 inside a pipeline to directly measure the blood temperature; however, this method has many limitations. Furthermore, the temperature measuring device 1 provided in this embodiment indirectly obtains the temperature of the blood medium inside the pipeline by measuring the temperature of the pipeline wall.

[0071] From an operational perspective, this indirect measurement method avoids the complex operation of directly placing the temperature sensor 12 inside the pipeline, and eliminates the need to consider the precise installation of the sensor in a narrow pipeline space, greatly simplifying the measurement process and making it more convenient.

[0072] In terms of safety, since the temperature sensor 12 does not come into direct contact with blood, the biocompatibility issues that may arise from direct contact between the sensor and blood are fundamentally eliminated. There is no need for complex special coating treatments on the temperature sensor 12 to meet biocompatibility principles. Simultaneously, it avoids interference with normal blood flow caused by the sensor's intrusion into the tubing, does not alter the blood flow state, and thus prevents the formation of local eddies or stagnant zones. This effectively reduces the risk of thrombosis in the extracorporeal circulation tubing, ensures normal blood circulation, and improves the safety and stability of the extracorporeal circulation system.

[0073] In terms of infection risk control, traditional invasive measurement methods keep the temperature sensor 12 in the blood environment for extended periods, increasing the potential risk of infection. In contrast, the indirect measurement method of this embodiment places the temperature sensor 12 outside the tubing, preventing direct contact with the blood and significantly reducing the likelihood of infection, thus lowering the health threat to the patient caused by infection.

[0074] From a cost perspective, the indirect measurement method eliminates the need for special biocompatibility treatment of the temperature sensor 12, reducing complex manufacturing processes and additional material costs. Furthermore, since this method does not interfere with blood flow, it lowers the probability of extracorporeal circulation system malfunctions and complications caused by abnormal flow, thereby reducing subsequent maintenance and treatment costs. Therefore, the temperature measurement device 1 provided in this embodiment has a significant advantage in cost control.

[0075] In summary, compared with the traditional method of placing the temperature sensor 12 inside the pipeline to measure blood temperature, the temperature measuring device 1 of this embodiment shows significant advantages in terms of convenience, safety, infection risk control, and cost.

[0076] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. A temperature measuring device (1), characterized in that The temperature measuring device (1) comprises: a base (11) in which a channel (10) is arranged to pass through, the channel (10) being used for a pipeline to pass through; a temperature sensor (12) arranged in the base (11) and located around the channel (10) to monitor the temperature of the outer circumferential wall of the pipeline.

2. The temperature measuring device (1) according to claim 1, characterized in that Further comprising: a heat conduction layer (13) arranged in the base (11), the heat conduction layer (13) being wrapped around the outer circumferential wall, and the temperature sensor (12) being embedded in the heat conduction layer (13) to obtain the temperature of the outer circumferential wall by monitoring the temperature of the heat conduction layer (13).

3. The temperature measuring device (1) according to claim 2, characterized in that The temperature measuring device (1) further comprises: a heat insulation layer (14) arranged in the base (11), the heat insulation layer (14) being wrapped around the heat conduction layer (13).

4. The temperature measuring device (1) according to claim 3, characterized in that The temperature sensor (12) is arranged in multiple, and multiple temperature sensors (12) are arranged in the heat conduction layer (13) in the axial direction of the channel (10).

5. The temperature measuring device (1) according to claim 3, characterized in that The temperature sensor (12) is arranged in multiple, and multiple temperature sensors (12) are arranged in the heat conduction layer (13) in the circumferential direction of the channel (10).

6. The temperature measuring device (1) according to claim 3, characterized in that The base (11) comprises a base body (111) and a cover body (112), the heat insulation layer (14) comprises a first part (141) and a second part (142) which are independent of each other, the first part (141) is arranged in the base body (111), the second part (142) is arranged in the cover body (112), the channel (10) is located in the first part (141), and an opening is arranged on the side of the channel (10) facing the cover body (112), when the cover body (112) is buckled, the second part (142) can close the opening.

7. The temperature measuring device (1) according to claim 1, characterized in that The temperature measuring device (1) further comprises: a resilient member arranged in the channel (10), the resilient member being used to press and fix the temperature sensor (12) to the outer circumferential wall.

8. The temperature measuring device (1 ) according to any one of claims 1 to 7, characterized in that The channel (10) is arranged in two, and the two channels (10) are arranged side by side in the base (11).

9. An extracorporeal circulation system, characterized by, The temperature measuring device (1) comprises: a heat exchanger (21) capable of cooling blood input into the inside to a target temperature and outputting, the heat exchanger (21) comprising an input end and an output end; a blood leading-out pipeline (22) connected with the input end and a blood leading-in pipeline (23) connected with the output end; The temperature measuring device (1) according to any one of claims 1 to 8, the blood leading-out pipeline (22) or the blood leading-in pipeline (23) passes through the channel (10); a controller in communication connection with the temperature sensor (12), the controller controlling the working state of the heat exchanger (21) according to the detection value of the temperature sensor (12).

10. The extracorporeal circulation system of claim 9, wherein, The channel (10) is arranged in two, and the two channels (10) are arranged side by side in the base (11), and the blood leading-out pipeline (22) and the blood leading-in pipeline (23) pass through the two channels (10) respectively.

Images