Intraoperative esophageal temperature monitoring device for ablation

Abstract

The intraoperative esophageal temperature monitoring device comprises a conveying catheter, an inflation catheter and balloons, one end of the conveying catheter and one end of the inflation catheter are integrally formed, the outer wall of the inflation catheter is connected with at least one balloon in a sealed mode, and the balloon is arranged at the maximum outer diameter position of an overall spiral structure of the inflation catheter. A temperature sensor is arranged on the outer wall of the balloon. The defects that in the prior art, no special esophagus inner wall temperature monitoring device exists in the ablation operation, esophagus inner wall temperature monitoring is not accurate, and medical negligence is likely to be caused are overcome. The esophagus temperature monitoring device in the ablation operation is simple and reasonable in overall structure, it can be guaranteed that the temperature sensor is tightly attached to the inner wall of the esophagus, then the accuracy of temperature monitoring of the inner wall of the esophagus in the ablation operation is guaranteed, and the safety of the operation is improved.

Description

Technical Field

[0001] This invention relates to the field of structural design technology for a device for monitoring and protecting the patient's esophageal temperature during atrial fibrillation ablation, and particularly to a device for monitoring esophageal temperature during ablation. Background Technology

[0002] Atrial fibrillation catheter ablation is generally treated with minimally invasive interventional surgery. This procedure involves inserting the ablation catheter through the femoral vein to the right atrium, then through the interatrial septum to the left atrium. The ablation target is primarily the vestibular region of the pulmonary veins, and methods such as radiofrequency ablation and cryoablation can be used.

[0003] Currently, ample evidence-based medicine confirms that the pulmonary veins are the primary triggering sites for atrial fibrillation. Therefore, safe and durable isolation of the pulmonary vein vestibule is the cornerstone of catheter ablation for atrial fibrillation. During the procedure, based on the anatomical characteristics of each patient's pulmonary vein vestibule, electrical isolation of the pulmonary vein vestibule is performed using electrical potential. Ablation energy and time are controlled at vulnerable structures such as the esophagus to reduce the risk of complications.

[0004] However, in current technology, there is no dedicated device for monitoring the patient's esophageal temperature during atrial fibrillation ablation. This presents a risk of accidental esophageal injury during the procedure, potentially leading to medical accidents. Summary of the Invention

[0005] In view of this, the main objective of the present invention is to provide an intraoperative esophageal temperature monitoring device for ablation procedures that can improve the adhesion between the temperature sensor and the esophageal wall and ensure the accuracy of esophageal wall temperature monitoring data.

[0006] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0007] An intraoperative esophageal temperature monitoring device for ablation includes: a catheter and a balloon, wherein the balloon has a spiral structure and the catheter is conductively connected to the balloon; the balloon is equipped with a temperature sensor.

[0008] In a preferred embodiment, the conduit includes a delivery conduit and an inflation conduit, one end of the delivery conduit being integrally formed with one end of the inflation conduit, and at least one balloon being sealed and connected to the outer wall of the inflation conduit.

[0009] In a preferred embodiment, the balloon has a spiral structure, and the balloon is spirally wound around the inflation conduit, with the inflation conduit communicating with the balloon.

[0010] In a preferred embodiment, the outer wall of the balloon has multiple arc-shaped protrusions, and the temperature sensor is disposed at the largest dimension of the arc-shaped protrusions.

[0011] In a preferred embodiment, the inflation conduit has a spiral structure and is disposed through the balloon, so that the balloon forms a spiral winding structure.

[0012] In a preferred embodiment, four or eight balloons are evenly arranged around the inflation conduit, each balloon is individually connected to a media injection device, and a temperature sensor is provided at the maximum size of each balloon.

[0013] In a preferred embodiment, a pressure sensor is arranged in parallel with the temperature sensor.

[0014] In a preferred embodiment, the data transmission line of the temperature sensor and / or pressure sensor extends into the center of the inflation conduit along the adjacent balloon or the recess of the balloon. A data line hole is provided at the junction of the delivery conduit and the inflation conduit. The data transmission line extends into the delivery conduit along the data line hole, and the other end of the data transmission line is connected to a monitoring device.

[0015] In a preferred embodiment, the central axial view of the inflation conduit is elliptical; imaging sensors are provided at both ends of the major axis of the elliptical structure.

[0016] In a preferred embodiment, four balloons are evenly arranged around the circumference of the inflation conduit, each balloon being an elliptical structure, with the four balloons located at both ends of the major axis and the minor axis of the elliptical structure of the inflation conduit.

[0017] In a preferred embodiment, eight balloons are evenly arranged around the inflation conduit, each balloon being an elliptical structure. Four balloons are located at the ends of the major axis and the ends of the minor axis of the ellipse, respectively, and another four balloons are located at the middle of adjacent balloons.

[0018] In a preferred embodiment, the temperature sensor has a circular structure with a central arc protrusion, and the edge of the temperature sensor is embedded in the outer wall of the balloon.

[0019] In a preferred embodiment, the pressure sensor has a ring structure, the temperature sensor is located in the middle of the pressure sensor, and the pressure sensor is completely embedded in the outer wall of the balloon.

[0020] In a preferred embodiment, the edge of the temperature sensor is annular, and the size of the annular structure is the same as that of the pressure sensor, with the pressure sensor supported at the bottom of the annular structure of the temperature sensor.

[0021] In a preferred embodiment, an embedding groove is provided at the maximum outer diameter of the balloon, the pressure sensor is embedded at the bottom of the embedding groove, and the upper side of the pressure sensor is wrapped and fixed to the temperature sensor by the protruding edge of the balloon.

[0022] In a preferred embodiment, the edge of the embedding slot wraps around the upper surface of the temperature sensor, the bottom of the embedding slot has a circular protrusion protruding upward, and the outer wall of the circular protrusion is the same as the inner diameter of the pressure sensor. The height of the circular protrusion is greater than the thickness of the pressure sensor, and a gap is left between the upper surface of the circular protrusion and the temperature sensor.

[0023] The intraoperative esophageal temperature monitoring device for ablation procedures of the present invention has the following beneficial effects:

[0024] The ablation procedure includes an esophageal temperature monitoring device, a catheter, and a balloon. The balloon has a spiral structure, and the catheter is connected to the balloon. A temperature sensor is installed on the outer wall of the balloon.

[0025] This addresses the shortcomings of existing technologies, such as the lack of a dedicated esophageal wall temperature monitoring device during ablation procedures, which leads to inaccurate esophageal wall temperature monitoring and potential medical accidents.

[0026] The intraoperative esophageal temperature monitoring device for this ablation procedure has a simple and reasonable overall structure, which can ensure that the temperature sensor fits tightly against the inner wall of the esophagus, thereby ensuring the accuracy of esophageal temperature monitoring during the ablation procedure and improving the safety of the surgery. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of an intraoperative esophageal temperature monitoring device for ablation according to one embodiment of the present disclosure;

[0029] Figure 2 This is a schematic diagram of the structure of an intraoperative esophageal temperature monitoring device for ablation according to another embodiment of this disclosure;

[0030] Figure 3 for Figure 2 The diagram shown is a structural schematic of an intraoperative esophageal temperature monitoring device for ablation according to another embodiment of the present disclosure, taken from another angle.

[0031] Figure 4 forFigure 3 The image shown is a partial enlarged view of point A of the intraoperative esophageal temperature monitoring device according to another embodiment of the present disclosure;

[0032] Figure 5 This is a schematic diagram of the esophageal temperature monitoring device during ablation according to another embodiment of the present disclosure;

[0033] Figure 6 for Figure 5 The image shown is a partial enlarged view of point B of the esophageal temperature monitoring device during ablation according to another embodiment of the present disclosure.

[0034] [Explanation of Key Component Symbols]

[0035] 01. Catheter;

[0036] 1. Delivery conduit; 11. Data cable hole;

[0037] 2. Inflation tube; 21. Injection port;

[0038] 3. Balloon; 31. Arc-shaped protrusion structure; 32. Embedded groove; 33. Circular protrusion;

[0039] 4. Temperature sensor;

[0040] 5. Pressure sensor;

[0041] 6. Data transmission cable;

[0042] 7. Protect the catheter. Detailed Implementation

[0043] The intraoperative esophageal temperature monitoring device for ablation procedures of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments of the present invention.

[0044] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0045] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0046] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0047] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0048] like Figures 1-6 As shown, the esophageal temperature monitoring device during the ablation procedure includes: a catheter 01 that delivers and conducts the medium and ensures its passage; and a balloon 3 that presses the temperature sensor tightly against the inner wall of the patient's esophagus.

[0049] To reduce the support exerted on the esophageal wall and minimize the supporting area, thus preventing the esophagus from being stretched, the balloon 3 has a spiral structure with only one spiral surface in contact with the esophageal wall. This significantly reduces the supporting area and ensures sufficient deformation space for the esophageal wall. To accommodate the injected medium and ensure balloon inflation, the catheter 01 is connected to the balloon 3. Furthermore, to meet temperature monitoring requirements, the balloon 3 is equipped with a temperature sensor 4 to monitor the temperature of the esophageal wall.

[0050] Preferably, a temperature sensor is provided on the outer wall of the balloon 3.

[0051] In another embodiment, an infrared temperature sensor can also be provided inside the balloon 3 to satisfy the function of temperature detection.

[0052] To meet the requirements of delivery and inflation (preferably gas, but other media are also acceptable), the catheter 01 includes: a delivery catheter 1 that can be appropriately deformed with the curvature of the esophagus (during use, one end of the delivery catheter 1 extends out of the patient's mouth and the other end extends into the patient's esophagus); and an inflation catheter 2 that can be positioned at the temperature measurement location in the esophagus and fill the balloon with a media.

[0053] To facilitate the adjustment of the angle of the delivery conduit 1 to the inflation conduit 2, and to push the inflation conduit 2 to a predetermined position to meet the temperature measurement requirements, one end of the delivery conduit 1 is integrally formed with one end of the inflation conduit 2.

[0054] In a preferred embodiment, the esophageal temperature monitoring device further includes a protective catheter 7, the inner diameter of which is larger than the maximum outer diameter of the inflation catheter 2. This ensures that the entire inflation catheter 2 and the delivery catheter 1 remain inside the protective catheter 7 during placement into the esophagus, guaranteeing that the entire device remains inside the protective catheter 7 when placed at the temperature measurement site in the patient's esophagus, and that the temperature is transmitted to the measurement site via the protective catheter 7.

[0055] In a preferred embodiment, the balloon 3 has a spiral structure, and the balloon 3 is spirally wound around the inflation conduit 2, with the inflation conduit 2 communicating with the balloon 3.

[0056] To reduce the supporting effect of balloon 3 on the esophagus and prevent compression of the esophagus during support, which could lead to contact between the esophagus and the ablation point and increase surgical risks, the outer wall of balloon 3 consists of multiple arc-shaped protrusions 31. A temperature sensor 4 is positioned at the largest point of each arc-shaped protrusion 31. Therefore, contact with the esophageal wall occurs only at the arc-shaped protrusions 31, concentrating the entire supporting force at these points. This ensures a tight fit between the temperature sensor 4 and the esophageal wall while minimizing its supporting effect, thus guaranteeing the safety of the ablation procedure.

[0057] In another embodiment, the inflation conduit 2 has a spiral structure and is disposed through the balloon 3, so that the balloon 3 forms a spiral winding structure.

[0058] In order to support the function of temperature sensor 4, at least one balloon 3 is sealed to the outer wall of the inflation conduit 2. At the maximum outer diameter of the overall spiral structure of the inflation conduit 2, the outer wall of the balloon 3 is provided with temperature sensor 4.

[0059] In a preferred embodiment, only one balloon 3 is provided, which is wrapped around the outer wall of the inflation tube 2. By setting multiple temperature sensors 4 at designated positions on the balloon 3, temperature data is collected by the multiple temperature sensors 4 respectively, ensuring the accuracy of the temperature data.

[0060] It can wrap around the entire inflatable tube 2, increasing the working area of ​​the balloon 3 (the number of points that come into contact with the esophageal wall for temperature measurement), reducing the requirements for the precision of the insertion size of the inflatable tube 2, thereby reducing the control requirements for medical staff and improving the accuracy of temperature measurement.

[0061] To reduce the supporting effect of balloon 3 on the esophagus and prevent compression of the esophagus during support, which could lead to contact between the esophagus and the ablation point and increase surgical risks, the outer wall of balloon 3 consists of multiple arc-shaped protrusions 31. A temperature sensor 4 is positioned at the largest point of each arc-shaped protrusion 31. Therefore, contact with the esophageal wall occurs only at the arc-shaped protrusions 31, concentrating the entire supporting force at these points. This ensures a tight fit between the temperature sensor 4 and the esophageal wall while minimizing its supporting effect, thus guaranteeing the safety of the ablation procedure.

[0062] In another embodiment, to achieve more precise operation, especially given the unevenness of various locations within the esophagus, it is necessary to ensure that the temperature sensors 4 at each location are in close contact with the esophageal wall to guarantee accurate temperature monitoring. Four or eight balloons 3 are evenly distributed around the circumference of the inflation conduit 2, each balloon 3 being individually connected to a media injection device. Therefore, there are four or eight support points on each circumference of the inflation conduit 2. By adjusting the support height of these points, the fit against the esophageal wall is achieved. The media injection device selects different injection volumes based on the required support height of each balloon 3. An injection port 21 is provided in the middle of the balloon 3 in the inflation conduit 2 to inject media into the balloon 3, thus inflating it. The connecting pipes for each media injection device extend along the inflation conduit 2.

[0063] In one embodiment, to facilitate the smooth delivery of the balloon 3 to the designated location on the esophageal wall, the inflatable tube 2 has a guide wire hole at one end near the balloon 3. The guide wire is passed through the guide wire hole into the inflatable tube 2 and positioned at the temperature measurement location in the esophagus. Then, the balloon 3 and the inflatable tube 2 are inserted into the designated position along the guide wire. Alternatively, during insertion, the entire outer wall of the balloon 3 can be provided with an outer sheath structure to wrap and guide the balloon, further ensuring smooth insertion of the balloon into the designated position in the esophagus.

[0064] In one embodiment, the support force of each balloon 3 on the esophageal wall can be controlled by the pressure value of the injected medium; that is, the balloon is highly flexible, and during the injection of the medium, the balloon 3 expands in volume, and the contact between the balloon 3 and the esophageal wall is compressed, thereby increasing the pressure of the medium. By adjusting the pressure value of the injected medium, it can be ensured that it adheres tightly to the esophageal wall, and at the same time, it can avoid excessive support force on the esophageal wall, which would affect the safety of the operation.

[0065] Furthermore, to prevent excessive injection of the medium into the balloon 3, especially at the highest point of the arc-shaped protrusion 31, which could cause the balloon 3 to support the esophagus excessively and affect surgical safety, a pressure sensor 5 is installed in parallel with the temperature sensor 4. The pressure sensor 5 measures the supporting force between the highest point of the arc-shaped protrusion 31 and the inner wall of the esophagus, ensuring that the injected medium is controlled in a timely manner when the pressure reaches the set threshold, thus ensuring surgical safety.

[0066] To ensure convenient data processing, the data transmission line 6 of the temperature sensor 4 and / or pressure sensor 5 extends into the center of the inflation conduit 2 along the adjacent balloon 3 (there is a gap between the adjacent balloon 3 to ensure that the data line 6 passes through without affecting the fit between the balloon 3 and the inner wall of the esophagus) or the concave part of the balloon 3 (if it is a balloon 3, the concave part is at the adjacent arc protrusion structure 31). A data line hole 11 is provided at the junction of the delivery conduit 1 and the inflation conduit 2. The data transmission line 6 extends into the delivery conduit 1 along the data line hole 11, and the other end of the data transmission line 11 is connected to the monitoring device.

[0067] Since the esophagus is adjacent to the atrium on only one side, when an elliptical structure is inserted into the esophagus, it expands outward at both ends of the long axis and contracts inward at both ends of the short axis. Therefore, the central axial view of the inflatable catheter 2 is elliptical. By placing the side of the esophagus adjacent to the atrium at the end of the short axis of the elliptical structure, and supporting the inner wall of the esophagus at both ends of the long axis, the supporting force between the inner wall of the esophagus and the atrium is reduced. The esophagus mainly deforms in the direction of the long axis, increasing the distance between the esophagus and the atrium, further reducing the possibility of esophageal damage during ablation.

[0068] To facilitate in vitro monitoring of the angle of the inflatable catheter 2 and ensure its proximity to the atrium along its short axis, contrast sensors are installed at both ends of the long axis of the elliptical structure. These sensors allow for the observation of the angle of the inflatable catheter 2.

[0069] In one embodiment, four balloons 3 are evenly arranged around the inflation conduit 2, each balloon 3 having an elliptical structure. The four balloons 4 are located at both ends of the major axis and the minor axis of the elliptical structure of the inflation conduit 2, respectively. Since the stress points are mainly at the ends of the major axis and the minor axis, the arrangement of four balloons can meet the requirements.

[0070] To improve monitoring accuracy, eight balloons 3 are evenly distributed around the inflation conduit 2. Each balloon 3 has an elliptical structure, with four balloons 3 located at the ends of the major and minor axes of the ellipse, and another four balloons 3 positioned in the middle of adjacent balloons 3. This increases the number of measurement points and improves measurement accuracy.

[0071] The four or eight balloons mentioned above are just one implementation method and do not mean that three or other numbers of balloons cannot meet the requirements for the use of the device.

[0072] To ensure both the strength of the connection between the temperature sensor 4 and the balloon 3, and the accuracy of the temperature measurement by the temperature sensor 4, the temperature sensor 4 has a circular structure (disc structure) with a central arc protrusion. The edge of the temperature sensor 4 is embedded in the outer wall of the balloon 3. This edge embedding method not only ensures the strength of the connection but also avoids scratching the inner wall of the patient's esophagus by the rigid temperature sensor 4.

[0073] To minimize the area of ​​exposed metal and prevent damage to the patient during radiofrequency ablation, the pressure sensor 5 has a ring-shaped structure, with the temperature sensor 4 located in the middle of the pressure sensor 5. The pressure sensor 5 is completely embedded in the outer wall of the balloon 3.

[0074] Furthermore, to ensure the accuracy of pressure measurement and avoid the balloon affecting the accuracy of the pressure sensor's measurement data, the temperature sensor 4 has a ring-shaped edge, and the size of the ring structure is the same as that of the pressure sensor 5. The pressure sensor 5 is supported at the bottom of the ring-shaped structure of the temperature sensor 4. By transmitting pressure through the rigid material temperature sensor 4, it is only necessary to expose the temperature sensor 4 in close contact with the esophageal wall, reducing the area of ​​exposed metal.

[0075] To facilitate the constraint and fixation of temperature sensor 4 and pressure sensor 5, an embedding groove 32 is provided at the maximum outer diameter of balloon 3. Pressure sensor 5 is embedded in the bottom of embedding groove 32, and the upper side of pressure sensor 5 is wrapped and fixed to temperature sensor 4 through the protruding edge of balloon 3.

[0076] To ensure the effective fixation of the embedding slot 32 for the temperature sensor 4 and pressure sensor 5, the edge of the embedding slot 32 wraps around the upper surface of the temperature sensor 4 (for fixation). A circular protrusion 33 protrudes upwards from the bottom of the embedding slot 32, and the outer wall of the circular protrusion 33 is the same as the inner diameter of the pressure sensor 5. The height of the circular protrusion 33 is greater than the thickness of the pressure sensor 5, thus fixing the pressure sensor 5 in place. To ensure that the pressure on the temperature sensor is fully applied to the pressure sensor 5, a gap is left between the upper surface of the circular protrusion 33 and the temperature sensor 4, preventing the circular protrusion 33 from supporting the temperature sensor 4 and thus ensuring the accuracy of the pressure sensor 5's measurement data.

[0077] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. An esophageal temperature monitoring device during ablation surgery, characterized in that, include: The catheter (01) and balloon (3) are provided. The balloon (3) has a spiral winding structure. The catheter (01) and balloon (3) are connected in a conductive manner. The balloon (3) is equipped with a temperature sensor (4).

2. The esophageal temperature monitoring device during ablation surgery according to claim 1, characterized in that, The conduit (01) includes a delivery conduit (1) and an inflation conduit (2), one end of the delivery conduit (1) and one end of the inflation conduit (2) are integrally formed, and at least one balloon (3) is sealed to the outer wall of the inflation conduit (2).

3. The esophageal temperature monitoring device during ablation surgery according to claim 2, characterized in that, The balloon (3) has a spiral structure and is spirally wound around the inflation conduit (2). The inflation conduit (2) is connected to the balloon (3).

4. The esophageal temperature monitoring device during ablation surgery according to claim 3, characterized in that, The outer wall of the balloon (3) is composed of multiple arc-shaped protrusions (31), and the temperature sensor (4) is located at the largest size of the arc-shaped protrusions (31).

5. The esophageal temperature monitoring device during ablation surgery according to claim 2, characterized in that, The inflation conduit (2) has a spiral structure and penetrates the balloon (3), so that the balloon (3) forms a spiral winding structure.

6. The esophageal temperature monitoring device during ablation surgery according to claim 5, characterized in that, Four or eight balloons (3) are evenly arranged around the inflation conduit (2), each balloon (3) is individually connected to a medium injection device, and a temperature sensor (4) is provided at the largest size of each balloon (3).

7. The esophageal temperature monitoring device during ablation surgery according to claim 4 or 6, characterized in that, A pressure sensor (5) is arranged in parallel with the temperature sensor (4).

8. The esophageal temperature monitoring device during ablation surgery according to claim 7, characterized in that, The data transmission line (6) of the temperature sensor (4) and / or pressure sensor (5) extends into the center of the inflation conduit (2) along the adjacent balloon (3) or the recess of the balloon (3). A data line hole (11) is provided at the junction of the delivery conduit (1) and the inflation conduit (2). The data transmission line (6) extends into the delivery conduit (1) along the data line hole (11). The other end of the data transmission line (11) is connected to the monitoring device.

9. The esophageal temperature monitoring device during ablation surgery according to claim 6, characterized in that, The central axial view of the air-filled conduit (2) is elliptical; imaging sensors are provided at both ends of the long axis of the elliptical structure.

10. The esophageal temperature monitoring device during ablation surgery according to claim 9, characterized in that, Four balloons (3) are evenly arranged around the inflation conduit (2), each balloon (3) is an elliptical structure, and the four balloons (4) are respectively located at both ends of the long axis and the short axis of the elliptical structure of the inflation conduit (2); Eight balloons (3) are evenly arranged around the inflation conduit (2). Each balloon (3) is an elliptical structure. Four balloons (3) are located at the ends of the major axis and the ends of the minor axis of the ellipse, respectively. Four other balloons (3) are arranged in the middle of adjacent balloons (3). The temperature sensor (4) has a circular structure, and the center of the circular structure has an arc protrusion. The edge of the temperature sensor (4) is embedded in the outer wall of the balloon (3). The pressure sensor (5) has a ring structure, the temperature sensor (4) is located in the middle of the pressure sensor (5), and the pressure sensor (5) is completely embedded in the outer wall of the balloon (3); The edge of the temperature sensor (4) is circular, and the size of the circular structure is the same as that of the pressure sensor (5). The pressure sensor (5) is supported at the bottom of the circular structure of the temperature sensor (4). An embedding slot (32) is provided at the maximum outer diameter of the balloon (3), and the pressure sensor (5) is embedded at the bottom of the embedding slot (32). The upper side of the pressure sensor (5) is wrapped and fixed by the edge of the balloon (3). The edge of the embedded slot (32) wraps around the upper surface of the temperature sensor (4). A circular protrusion (33) protrudes upward from the bottom of the embedded slot (32), and the outer wall of the circular protrusion (33) is the same as the inner diameter of the pressure sensor (5). The height of the circular protrusion (33) is greater than the thickness of the pressure sensor (5). A gap is left between the upper surface of the circular protrusion (33) and the temperature sensor (4).

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