Temperature measuring device and extracorporeal circulation system

Abstract

The present application relates to the technical field of temperature measurement for extracorporeal circulation, and specifically provides a temperature measuring device and an extracorporeal circulation system, which are intended to solve some drawbacks of existing invasive temperature measuring devices when applied to blood pipelines. To this end, the temperature measuring device of the present application includes: a base, which is provided with a channel running through it, and the channel is used for the pipeline to pass through; a temperature sensor, which is arranged in the base and is located around the channel to monitor the temperature of the outer wall of the pipeline. The temperature measuring device provided by the present application adopts an indirect measurement method to obtain the temperature of the liquid in the tube by measuring the temperature of the pipeline wall. It is easy to operate, can avoid the interference of the measuring device with the flow of liquid in the pipeline, and its cost is also low.

Description

Technical Field

[0001] The present application relates to the technical field of temperature measurement for extracorporeal circulation, and specifically provides a temperature measurement device and an extracorporeal circulation system. Background Art

[0002] Hypothermia therapy is a method used to treat human diseases. It mainly uses targeted cooling technology to achieve body temperature management. Specifically, hypothermia therapy is to control the human body temperature at 32-34°C through medical intervention measures, so as to slow down metabolism and inflammatory response, and then protect organ tissues from damage due to ischemia and hypoxia. Hypothermia therapy is widely used in brain resuscitation after cardiac arrest and critical care treatment. At present, targeted cooling technologies mainly include surface cooling, drug cooling and intravascular cooling technology. Compared with surface cooling and drug cooling, intravascular cooling technology directly regulates blood temperature through the extracorporeal circulation heat exchange system, which has the advantages of fast cooling rate and high temperature control accuracy.

[0003] The extracorporeal heat exchange system usually consists of a blood pump, a heat exchanger, a temperature measuring device and a closed-loop pipeline. Blood is drawn out through femoral vein or internal jugular vein puncture, and driven by the blood pump, it is led to the heat exchanger through the blood lead-out pipeline. Subsequently, the heat exchanger conducts efficient convection heat exchange with the blood through the refrigerant, and combines real-time temperature feedback to achieve precise temperature control. The cooled blood is then returned to the femoral artery or central vein through the blood lead-in pipeline, thus forming a closed-loop temperature control system.

[0004] In this process, the temperature measuring device obtains the initial temperature and the temperature after cooling of the blood by monitoring the temperature in the blood outlet pipeline and the blood inlet pipeline respectively. These two temperatures provide the basic basis for the precise control of the heat exchange process. In some related technologies, the temperature measuring devices of these two pipelines are usually invasive, that is, the temperature sensor is placed in the pipeline to measure the blood temperature. This method has extremely high requirements for the processing and manufacturing of the temperature sensor. Because it is in direct contact with the blood, it must meet the principle of biocompatibility, and special coatings are often required to reduce adverse reactions with the blood. However, the intrusion of the temperature sensor into the pipeline will still affect the normal circulation of blood, change the flow state of the blood, and easily form local eddies or stagnant areas. What's more serious is that this abnormal flow can easily cause thrombosis in the extracorporeal circulation pipeline, hinder the normal circulation of blood, reduce the blood perfusion of important organs, reduce the efficiency of the extracorporeal circulation system, interfere with the treatment process, affect the treatment effect, and even bring additional health risks to patients.

[0005] In view of this, a new technical solution is needed in this field to solve the above problems. Summary of the invention

[0006] The present application aims to solve the above technical problems, that is, to solve a series of drawbacks of existing invasive temperature measurement devices when applied to blood lines. Such devices have extremely high manufacturing requirements, and when placed in blood lines, they will affect the normal circulation of blood, and thus easily cause thrombosis, hinder the normal circulation of blood, interfere with treatment and endanger the health of patients.

[0007] In a first aspect, the present application provides a temperature measurement device, comprising:

[0008] A base having a channel therein, wherein the channel is used for the pipeline to pass through;

[0009] The temperature sensor is arranged in the base and located around the channel to monitor the temperature of the outer peripheral wall of the pipeline.

[0010] Optionally, it also includes:

[0011] A heat-conducting layer is arranged in the base, the heat-conducting layer is coated on the outer peripheral wall, and the temperature sensor is embedded in the heat-conducting layer to obtain the temperature of the outer peripheral wall by monitoring the temperature of the heat-conducting layer.

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

[0013] The heat insulation layer is arranged in the base, and the heat insulation layer is coated outside the heat conducting layer.

[0014] Optionally, a plurality of temperature sensors are provided, and the plurality of temperature sensors are arranged in the heat conductive layer at intervals along the axial direction of the channel.

[0015] Optionally, a plurality of temperature sensors are provided, and the plurality of temperature sensors are arranged in the heat conductive layer at intervals along the circumference of the channel.

[0016] Optionally, the base includes a base body and a cover body, the insulation layer includes a first part and a second part that are independent of each other, the first part is arranged in the base body, the second part is arranged in the cover body, the channel is located in the first part, and an opening is provided on a side of the channel facing the cover body, and when the cover body is buckled, the second part can close the opening.

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

[0018] An elastic member is arranged in the channel, and 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 in the base.

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

[0021] A heat exchanger, which can cool the blood input into the heat exchanger to a target temperature before outputting the blood, the heat exchanger comprising an input end and an output end;

[0022] a blood outlet pipeline and a blood inlet pipeline, wherein the blood outlet pipeline is connected to the input end, and the blood inlet pipeline is connected to the output end;

[0023] The temperature measuring device according to any one of the first aspects, wherein the blood outlet pipe or the blood inlet pipe passes through the channel;

[0024] A controller is connected to the temperature sensor for controlling the working state of the heat exchanger according to the detection value of the temperature sensor.

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

[0026] The temperature measurement device provided by the present application adopts an indirect measurement method, and obtains the temperature of the liquid in the pipe by measuring the temperature of the pipe wall, which shows significant advantages in many aspects. For example, in terms of operation, it avoids the complicated process of installing sensors in the pipe, making the measurement more convenient; in terms of safety, since there is no direct contact with the liquid, it can prevent interference with the flow of the liquid, especially when applied to blood temperature measurement, it does not require special treatment to meet biocompatibility, and can effectively reduce the risk of thrombosis and greatly reduce the possibility of infection; in terms of cost, compared with the sensor placed inside the pipe for measurement, the temperature measurement device provided by the present application is lower in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings, in which:

[0028] Figure 1 is a schematic structural diagram of a temperature measurement device according to an embodiment of the present application;

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

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

[0031] Figure 4 It is a schematic structural diagram of an extracorporeal circulation system according to an embodiment of the present application. List of reference numerals:

[0032] 1-temperature measuring device, 11-base, 111-base body, 112-cover, 113-buckle, 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;

[0033] 21- heat exchanger, 22- blood outlet pipeline, 23- blood inlet pipeline. DETAILED DESCRIPTION

[0034] The preferred embodiments of the present application are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present application and are not used to limit the scope of protection of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0035] It should be noted that in the description of this application, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description, and does not indicate or imply that the relevant devices or components must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on this application. In addition, the ordinal numbers "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] In the field of cryotherapy, the temperature measurement of the extracorporeal circulation circuit mostly adopts an invasive method, that is, the temperature sensor is directly placed inside the blood outlet circuit and the blood inlet circuit to obtain the temperature of the blood in the circuit.

[0038] Since the temperature sensor needs to be in direct contact with the blood, it must meet the principle of biocompatibility. At the same time, in order to reduce the possible adverse reactions between the sensor and the blood, it is often necessary to add a special coating. Therefore, the invasive temperature measurement method has extremely high requirements for the processing and manufacturing of the sensor. However, even if these measures are taken, the operation of invading the temperature sensor into the pipeline will still have an adverse effect on the normal circulation of the blood. For example, it will affect the flow state of the blood in the pipeline, and may form local blood vortices or stagnant areas. More seriously, the abnormal flow state of blood can easily cause the formation of thrombus in the extracorporeal circulation pipeline. Once a thrombus is formed, it will hinder the normal circulation of blood and reduce the blood perfusion of important organs. This will not only reduce the working efficiency of the extracorporeal circulation system, but also cause serious interference to the entire treatment process, directly affect the treatment effect, and may even bring additional health risks to patients.

[0039] In view of the problems existing in the above background technology, the present application proposes a temperature measuring device 1. The device is intended to indirectly obtain the temperature of a medium such as blood in a pipeline by measuring the temperature of the outer peripheral wall of the pipeline.

[0040] Please refer to Figure 1-3 , is a temperature measuring device 1 according to an embodiment of the present application, the device includes a base 11 and a temperature sensor 12 arranged in the base 11.

[0041] Specifically, the base 11 is provided with a channel 10 passing therethrough, and the pipeline that needs to be temperature measured passes through the channel 10. The temperature sensor 12 is arranged around the channel 10 so as to monitor the temperature of the pipeline more effectively.

[0042] In one implementation, the temperature sensor 12 is installed inside the base 11 at a position close to the channel wall.

[0043] In another implementation, the temperature sensor 12 is tightly attached to the outer wall of the pipeline by means of a thermally conductive adhesive having good thermal conductivity and viscosity. The thermally conductive adhesive can ensure good heat transfer between the sensor and the pipeline wall and reduce measurement errors. At the same time, in order to prevent the temperature sensor 12 from falling off, an elastic member or a binding band can also be used to reinforce the sensor.

[0044] The temperature measuring device 1 of this embodiment adopts an indirect measurement method, and obtains the temperature of the liquid in the pipe by measuring the temperature of the pipe wall, which shows significant advantages in many aspects. For example, in terms of operation, it avoids the complicated process of installing sensors in the pipe, making the measurement more convenient; in terms of safety, since there is no direct contact with the liquid, it can prevent interference with the flow of the liquid, especially when applied to blood temperature measurement, it does not require special treatment to meet biocompatibility, and can effectively reduce the risk of thrombosis and greatly reduce the possibility of infection; in terms of cost, compared with the sensor placed inside the pipe for measurement, the temperature measuring device 1 provided in this embodiment is lower in cost.

[0045] In one embodiment, reference Figure 1 and Figure 2 The base 11 adopts a structure consisting of a base body 111 and a cover body 112 that is snap-fitted to the base body 111 , so that the channel 10 can be opened and closed by opening and closing the cover body 112 .

[0046] Furthermore, the base body 111 and the cover body 112 can be locked by means of the buckle 113. This locking method improves the stability of the connection between the cover body 112 and the base body 111.

[0047] In one implementation, the channel 10 is structured as follows: one part is disposed in the base body 111, and the other part is disposed in the cover body 112. When the cover body 112 is buckled with the base body 111, the two parts of the channel 10 are connected to each other to form a complete and closed channel 10 space.

[0048] In another implementation, refer to Figure 2 , and its cross-sectional shape is a combination of an arc and a rectangle. Specifically, the lower part of the cross section of the channel 10 is an arc-shaped structure, which can achieve a tight fit between the pipeline, and the temperature sensor 12 is arranged near the arc-shaped structure to better obtain the temperature of the outer peripheral wall of the pipeline. The upper part of the cross section of the channel 10 is a rectangular structure, and the side of the rectangular structure facing the cover 112 is an opening. The shape of the rectangular opening can make it easier for the pipeline to be embedded in the channel 10. When the cover 112 is buckled with the base body 111, the cover 112 can cover and close the opening, thereby forming a closed channel 10 space.

[0049] The design of the base 11 channel 10 being openable greatly improves the convenience of operation. For the pipelines that have been connected to other components, such as the blood inlet and outlet pipelines in the extracorporeal circulation system, the pipelines can be easily inserted into the channel 10 by simply opening the cover 112, thus avoiding the difficulty of inserting the pipeline caused by the traditional closed channel 10.

[0050] In one embodiment, in order to improve the accuracy and response speed of pipeline temperature detection, a heat-conducting layer 13 is added to the channel 10 of the base 11. The heat-conducting layer 13 is wrapped around the outer wall of the pipeline in a tightly fitting manner, and the temperature sensor 12 is embedded in the heat-conducting layer 13. The heat of the medium in the pipeline will be transferred to the heat-conducting layer 13 through the pipeline wall, and the efficient heat conduction characteristics of the heat-conducting layer 13 can quickly transfer the temperature change to the sensor. The temperature sensor 12 indirectly obtains the temperature of the medium in the pipeline by real-time monitoring the temperature of the heat-conducting layer 13, thereby reducing the temperature measurement lag phenomenon and improving data accuracy.

[0051] Furthermore, in the process of measuring the temperature of the medium in the pipeline, considering the flow characteristics of the medium in the pipeline, its flow is often non-uniform. In this case, if the overall temperature of the medium in the pipeline is inferred only based on the temperature of the local peripheral wall, a large measurement error is very likely to occur, because the local peripheral wall temperature is difficult to fully and accurately reflect the overall thermal state of the medium. Therefore, the temperature sensor 12 is embedded in the heat-conducting layer 13 wrapped around the peripheral wall of the pipeline. The heat-conducting layer 13 can conduct the heat of the medium in the pipeline more evenly, so that the temperature data obtained by the temperature sensor 12 is closer to the actual overall temperature of the medium in the pipeline, thereby helping to significantly improve the accuracy of temperature measurement.

[0052] The material selection of the heat-conducting layer 13 is diverse, and can be metal or heat-conducting ceramics. For example, the heat-conducting layer 13 can be made of copper or steel with good thermal conductivity, or can be made of heat-conducting ceramics with good thermal conductivity.

[0053] Considering the compatibility between the heat-conducting layer 13 and the channel 10 , there are two structural forms of the heat-conducting layer 13 , one is a semi-enclosed type and the other is a fully-enclosed type.

[0054] refer to Figure 2 The heat-conducting layer 13 is a semi-enclosed structure. Specifically, the heat-conducting layer 13 is designed in the form of a heat-conducting seat, and an arc groove is provided on the side of the heat-conducting seat facing the cover 112. The design of the arc groove provides convenience and stability for the installation of the pipeline, and the pipeline can be directly embedded in the channel 10 of the base 11 along the arc groove.

[0055] refer to Figure 3 The heat-conducting layer 13 is a fully enclosed structure. Specifically, the fully enclosed heat-conducting layer 13 is divided into two parts, upper and lower, which are respectively embedded in the channel 10 of the base body 111 and the cover body 112. When the cover body 112 is closed, the upper and lower heat-conducting layers 13 are tightly attached to the outer peripheral wall of the pipeline to form a 360° all-round heat conduction path.

[0056] In order to further improve the accuracy of temperature detection, a plurality of temperature sensors 12 are embedded in the heat conductive layer 13, aiming to improve the detection accuracy through multi-point temperature measurement.

[0057] In one implementation, multiple temperature sensors 12 are distributed at intervals along the axial direction of the channel 10, and the temperature distribution of the medium in the pipeline in the axial direction can be captured in real time through synchronous temperature measurement at multiple points in the axial direction. Because the medium in the pipeline is affected by many factors, the axial temperature is not uniform, and a single sensor can only measure one point of temperature. However, through synchronous temperature measurement at multiple points in the axial direction, and weighted averaging or algorithm filtering of the measured values ​​of multiple sensors, if a sensor fails due to damage or poor contact, the remaining temperature sensors 12 can still maintain the basic temperature measurement function.

[0058] Another is that in the implementation method, multiple temperature sensors 12 are spaced circumferentially along the channel 10. Through synchronous measurement of multiple circumferential points, temperature information at different positions of the pipeline circumference can be obtained, and the measurement values ​​of multiple sensors are weighted averaged or algorithm filtered. If a sensor fails due to damage or poor contact, the remaining temperature sensors 12 can still maintain the basic temperature measurement function, avoiding overall temperature misjudgment due to circumferential local temperature measurement deviations.

[0059] Of course, the axial and circumferential distribution can also be combined to build an all-round, three-dimensional temperature monitoring network to comprehensively and accurately obtain the temperature information of the medium in the pipeline, minimize the measurement error, and provide a data basis for the precise control of the system.

[0060] In one embodiment, in order to reduce the heat dissipation of the medium in the pipeline and reduce the interference of external environmental factors on temperature measurement, and further improve the measurement accuracy, a heat insulation layer 14 is coated outside the heat conductive layer 13.

[0061] Specifically, refer to Figure 2 and Figure 3 The heat insulation layer 14 is divided into two independent parts, namely, a first part 141 and a second part 142. The first part 141 is arranged in the base body 111, and the second part 142 is arranged in the cover body 112. When the cover body 112 is buckled on the base body 111, the second part 142 of the heat insulation layer 14 located in the cover body 112 can just close the opening of the channel 10. In this embodiment, the heat insulation layer 14 is preferably thermal insulation cotton.

[0062] In one embodiment, the temperature monitoring device is provided with at least two channels 10 for the pipelines to pass through, so that the temperature measuring device 1 can monitor the temperatures of multiple pipelines at the same time.

[0063] This embodiment further provides an extracorporeal circulation system, which includes the temperature measuring device 1 as described above.

[0064] refer to Figure 4The extracorporeal circulation system is usually composed of a blood pump, a heat exchanger 21, a temperature measuring device 1 and a closed-loop pipeline. In the extracorporeal circulation operation, the specific blood extraction and circulation process is as follows: With the help of femoral vein or internal jugular vein puncture technology, the blood in the patient's body is extracted. Then, under the driving force provided by the blood pump, the blood is transported to the heat exchanger 21 along the blood extraction pipeline 22.

[0065] The heat exchanger 21 can adjust the temperature of the incoming blood in real time and accurately. 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 an efficient heat exchange process with a refrigerant or other heat exchange medium according to a preset target temperature.

[0066] During the heat exchange process, the heat exchanger 21 conducts efficient convection heat exchange with the blood through a refrigerant such as cooling water, and the controller adjusts the working state of the heat exchanger 21 in combination with real-time temperature feedback to achieve precise temperature control and ensure that the blood temperature can accurately reach the preset target temperature range. Once the blood temperature reaches the target temperature, the heat exchanger 21 will discharge the treated blood through its output end, which is closely connected to the blood introduction pipeline 23, and the cooled blood will be re-delivered back to the patient's body through the blood introduction pipeline 23, thereby completing the blood temperature regulation process in the entire extracorporeal circulation.

[0067] Furthermore, the blood outlet pipe 22 and the blood inlet pipe 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 respectively obtain the initial temperature of the blood in the blood outlet pipe 22 and the temperature of the blood in the blood inlet pipe 23 after being cooled by the heat exchanger 21 in real time.

[0068] In the heat exchange process of the extracorporeal circulation system, these two temperature data are of great significance, and they are the basic basis for realizing 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 the heat exchange. This temperature difference data is crucial feedback information for the control system of the heat exchanger 21. The controller can accurately adjust the operating parameters of the heat exchanger 21, such as the flow rate and temperature of the refrigerant, according to the initial temperature, the temperature after cooling and the temperature difference between the two obtained in real time, to ensure that the blood can be accurately cooled to the preset target temperature, thereby realizing fine control of the entire heat exchange process and improving the safety and effectiveness of the extracorporeal circulation system.

[0069] In the related art, the traditional temperature measurement method is to place a temperature sensor 12 in the pipeline to directly measure the blood temperature, but this method has many limitations. Further, the temperature measurement device 1 provided in this embodiment indirectly obtains the temperature of the medium blood in the pipeline by measuring the temperature of the pipeline wall.

[0070] From an operational perspective, this indirect measurement method avoids the complicated operation of placing the temperature sensor 12 directly into the pipeline, and there is no need to consider the precise installation of the sensor in the narrow pipeline space, which greatly simplifies the measurement process and is therefore more convenient.

[0071] In terms of safety, since the temperature sensor 12 is not in direct contact with the blood, the biocompatibility problem that may be caused by direct contact between the sensor and the blood is fundamentally eliminated, and there is no need to perform complex special coating treatment on the temperature sensor 12 to meet the biocompatibility principle. At the same time, it also avoids the interference of the sensor intruding into the pipeline with the normal circulation of blood, does not change the flow state of the blood, and thus prevents the formation of local eddy currents or stagnant areas, effectively reduces the risk of thrombosis in the extracorporeal circulation pipeline, ensures the normal circulation of blood, and improves the safety and stability of the extracorporeal circulation system.

[0072] In terms of infection risk control, the traditional invasive measurement method makes the temperature sensor 12 in the blood environment for a long time, increasing the potential risk of infection. In the indirect measurement method of this embodiment, the temperature sensor 12 is located outside the pipeline and does not come into direct contact with the blood, which significantly reduces the possibility of infection and reduces the health threat to the patient caused by infection.

[0073] From a cost perspective, the indirect measurement method does not require special biocompatibility treatment of the temperature sensor 12, reducing the complex process and additional material costs in the manufacturing process. In addition, since this method does not interfere with blood flow, the probability of extracorporeal circulation system failure and complications caused by abnormal flow is reduced, thereby reducing subsequent maintenance costs and treatment costs. Therefore, the temperature measurement device 1 provided in this embodiment has obvious advantages in cost control.

[0074] In summary, compared with the traditional method of placing the temperature sensor 12 in the pipeline to measure the blood temperature, the temperature measurement device 1 of this embodiment shows significant advantages in terms of convenience, safety, infection risk control and cost.

[0075] So far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present 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 fall within the protection scope of the present application.

Claims

1. A temperature measuring device (1), characterized in that: include: A base (11) is provided with a channel (10) running through it, wherein the channel (10) is used for allowing a pipeline to pass through; A temperature sensor (12) is arranged in the base (11) and is located around the channel (10) to monitor the temperature of the outer peripheral wall of the pipeline.

2. The temperature measuring device (1) according to claim 1, characterized in that Also includes: A heat-conducting layer (13) is arranged in the base (11), the heat-conducting layer (13) is coated on the outer peripheral wall, and the temperature sensor (12) is embedded in the heat-conducting layer (13) to obtain the temperature of the outer peripheral wall by monitoring the temperature of the heat-conducting 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) is arranged inside the base (11), and the heat insulation layer (14) is coated outside the heat conducting layer (13).

4. The temperature measuring device (1) according to claim 3, characterized in that A plurality of the temperature sensors (12) are provided, and the plurality of the temperature sensors (12) are arranged in the heat conducting layer (13) at intervals along the axial direction of the channel (10).

5. The temperature measuring device (1) according to claim 3, characterized in that: A plurality of the temperature sensors (12) are provided, and the plurality of the temperature sensors (12) are arranged in the heat conducting layer (13) at intervals along 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 a 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: An elastic member is arranged in the channel (10), and is used to press and fix the temperature sensor (12) to the outer peripheral wall.

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

9. An extracorporeal circulation system, characterized in that: include: A heat exchanger (21) capable of cooling blood input therein to a target temperature before outputting the blood, the heat exchanger (21) comprising an input end and an output end; a blood outlet pipeline (22) and a blood inlet pipeline (23), wherein the blood outlet pipeline (22) is connected to the input end, and the blood inlet pipeline (23) is connected to the output end; The temperature measuring device (1) according to any one of claims 1 to 8, wherein the blood outlet pipe (22) or the blood inlet pipe (23) passes through the channel (10); A controller is communicatively connected to the temperature sensor (12), and the controller controls the working state of the heat exchanger (21) according to the detection value of the temperature sensor (12).

10. The extracorporeal circulation system according to claim 9, characterized in that: The channels (10) are provided with two channels (10), which are arranged side by side in the base (11), and the blood outlet pipeline (22) and the blood inlet pipeline (23) pass through the two channels (10) respectively.

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