Atrial pressure measurement device

Abstract

The present application relates to a device for measuring atrial pressure, which includes: a strip catheter, a first sensor, a second sensor, a moving mechanism, a driver, an ultrasonic probe and a processing device; the strip catheter is used to be introduced into the esophagus, and the moving mechanism, the driver and the ultrasonic probe are arranged in the strip catheter; the moving mechanism is arranged with a first sensor and a second sensor; pressure data is collected by the first sensor and the second sensor, and the wall thickness data of the esophageal wall and the atrium are collected by the ultrasonic probe, and the data is processed by the processing device to calculate the atrial pressure data, and the moving mechanism can be pulled back into the strip catheter by the driver after the measurement is completed, and the entire measurement process will not cause damage to the esophageal wall, thereby achieving the purpose of obtaining the atrial pressure in a non-invasive manner.

Description

Technical Field

[0001] The present application relates to the technical field of cardiac pressure measurement, and in particular to a device for measuring atrial pressure. Background Art

[0002] Impairment of left atrial function is one of the early manifestations of many cardiovascular diseases. Left atrial pressure (LAP) is an important indicator of the left atrial filling process and an important indicator for various heart diseases, especially for evaluating left ventricular diastolic function. With the deepening of research on heart failure with preserved ejection fraction, left atrial pressure has gradually received attention.

[0003] In clinical practice, the traditional invasive method of obtaining left atrial pressure (LAP) is to measure and evaluate left atrial pressure (LAP) by invasively inserting a right cardiac catheter to measure the pulmonary capillary wedge pressure. This invasive method has certain risks and is not very reliable. In addition, there are non-invasive methods such as transesophageal echocardiography, which is a long-used and commonly used non-invasive method for evaluating heart failure. Among them, echocardiography uses pulsed ultrasound waves based on the principle of ultrasonic ranging to penetrate the chest wall and soft tissue to measure the periodic activities of the underlying structures such as the heart wall, ventricle and valve, and displays the relationship curve between the corresponding activities of each structure and time on the monitor. This echocardiogram cannot represent the left atrial pressure (LAP), that is, the current non-invasive echocardiogram still cannot measure the left atrial pressure (LAP). Summary of the invention

[0004] Based on this, it is necessary to provide an atrial pressure measuring device that can non-invasively measure atrial pressure in order to address the above-mentioned problems.

[0005] A device for measuring atrial pressure comprises: a strip catheter, a moving mechanism, a driver, an ultrasonic probe and a processing device; the strip shell is arranged in the esophagus, and the moving mechanism, the driver and the ultrasonic probe are arranged in the strip catheter; a first sensor and a second sensor are arranged on the moving mechanism; the driver is used to drive the moving mechanism to move so that the first sensor and the second sensor are exposed outside the strip catheter or hidden inside the strip catheter; there is a preset spacing distance between the first sensor and the second sensor, and the first sensor collects pressure data at the position when it is exposed outside the strip catheter and presses the esophageal wall to contact the atrium; the second sensor collects pressure data at the position when it is exposed outside the strip catheter and presses the esophageal wall to contact the atrium; the ultrasonic probe is used to collect wall thickness data of the esophageal wall and the atrium; the processing device is connected to the first sensor, the second sensor and the ultrasonic probe, and is used to obtain the pressure data collected by the first pressure sensor, the pressure data collected by the second sensor and the wall thickness data collected by the ultrasonic probe, and calculate according to a preset formula to obtain atrial pressure data.

[0006] In one of the embodiments, the ultrasound probe and the moving mechanism are both located at the front end of the strip catheter, and the processing device is also used to obtain the position point on the esophageal wall closest to the atrium based on the distance between each position point on the esophageal wall collected by the ultrasound probe and the atrium, and control the driver to drive the moving mechanism to move based on the position point closest to the atrium, so that the first sensor, the second sensor and the ultrasound probe perform pressure and wall thickness detection at the position point closest to the atrium.

[0007] In one embodiment, the device further includes a controller, which is connected to a driver, and is used to control the driver to push or pull back the moving mechanism so that the first sensor and the second sensor are exposed or hidden in the strip-shaped conduit.

[0008] In one of the embodiments, the controller is also used to control the driver to stop pushing the moving mechanism for a first preset time period and then continue to push the moving mechanism when the second sensor collects pressure data, and control the driver to pull back the moving mechanism while continuing to push the moving mechanism for a second preset time period.

[0009] In one embodiment, the controller is also used to control the driver to stop pulling back the moving mechanism for a first preset period of time and then continue to pull back the moving mechanism to pull the moving mechanism back into the strip conduit when the pressure data collected by the second sensor reaches a preset critical value.

[0010] In one of the embodiments, the device further comprises a fixing member, which is disposed in the strip-shaped conduit, and the moving mechanism, the driver and the ultrasonic probe are all fixedly disposed on the fixing member.

[0011] In one embodiment, the moving mechanism includes a bearing component and a moving component, the moving component is arranged on a fixed component, the bearing component is arranged on the moving component, and the first sensor and the second sensor are arranged on the bearing component; the driver is used to drive the moving component to move and push the bearing component so that the first sensor and the second sensor are exposed outside the strip conduit or hidden inside the strip conduit.

[0012] In one embodiment, the moving component includes a first moving component and a second moving component, the first moving component is disposed on the fixed component, the second moving component is disposed on the first moving component and can move relative to the first moving component, and the bearing component is disposed on the second moving component.

[0013] In one embodiment, the bearing component includes a protrusion and a platform, the protrusion is arranged on the platform, the first sensor is arranged on the protrusion, and the second sensor is arranged on the platform.

[0014] In one embodiment, the first moving member and the second moving member are cylindrical, the second moving member is sleeved in the first moving member, and the driver is disposed in the first moving member.

[0015] The above-mentioned device arranges the moving mechanism and the ultrasonic probe in a strip catheter, then sends the strip catheter into the esophageal wall, and pushes the moving mechanism out of the strip catheter through a driver, so that the first sensor and the second sensor on the moving mechanism can contact the esophageal wall and squeeze the esophageal wall to contact the atrium, so that the first sensor and the second sensor can collect pressure data at their respective positions. Then the processing device combines the wall thickness data and pressure data collected by the ultrasonic probe to calculate the atrial pressure, and the moving mechanism can be pulled back into the strip catheter by the driver after the measurement is completed. The entire measurement process will not cause damage to the esophageal wall, thereby achieving the purpose of obtaining the atrial pressure in a non-invasive manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A diagram of an application scenario of a device for measuring atrial pressure provided by an embodiment;

[0017] Figure 2 A schematic diagram of the structure of an atrial pressure measuring device provided by an embodiment;

[0018] Figure 3 A schematic diagram of the structure of an atrial pressure measuring device provided by an embodiment;

[0019] Figure 4 A schematic diagram of the working process of an atrial pressure measuring device provided by an embodiment;

[0020] Figure 5 A graph of pressure data collected according to an embodiment. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0022] In one embodiment, if Figure 1 As shown, an application scenario diagram of an atrial pressure measuring device is provided, wherein the human heart is divided into the left atrium and the right atrium. This article takes the left atrium as an example, and measures the left atrial pressure through the atrial pressure measuring device. Figure 1 In the figure, the strip catheter 3 can be extended into the esophagus, and the distance between the esophageal wall 2 and the left atrium 1 is relatively close. When the strip catheter 3 is at a certain position of the esophageal wall 2, the moving mechanism 33 in the strip catheter 3 will be pushed out of the strip catheter 3 by the driver 31, so that the sensor on the moving mechanism 31 collects pressure data, and the ultrasonic probe 32 in the strip catheter 3 also collects the wall thickness data of the esophageal wall 2 and the left atrium 1. After finally summarizing, the corresponding left atrial pressure is calculated.

[0023] In one embodiment, Figure 2 As shown, a device for measuring atrial pressure is provided, which includes: a strip catheter 3, a driver 31, an ultrasound probe 32, a moving mechanism, a first sensor 333, a second sensor 334 and a processing device.

[0024] The strip catheter 3 is used to be introduced into the esophagus, and a moving mechanism, a driver 31 and an ultrasonic probe 32 are arranged in the strip catheter 3; a first sensor 333 and a second sensor 334 are arranged on the moving mechanism; the driver 31 is used to drive the moving mechanism to move so that the first sensor 333 and the second sensor 334 are exposed outside the strip catheter 3 or hidden inside the strip catheter 3; the first sensor 333 and the second sensor 334 have a preset spacing distance along the moving direction of the moving mechanism, and the first sensor 333 collects pressure data at the position when it is exposed outside the strip catheter 3 and presses the esophageal wall 2 to contact the atrium; the second sensor 334 collects pressure data at the position when it is exposed outside the strip catheter 3 and presses the esophageal wall 2 to contact the atrium; the ultrasonic probe 32 is used to collect wall thickness data of the esophageal wall 2 and the atrium; the processing device is connected to the first sensor 333, the second sensor 334 and the ultrasonic probe 32, and is used to obtain atrial pressure data according to the pressure data collected by the first pressure sensor, the pressure data collected by the second sensor 334 and the wall thickness data collected by the ultrasonic probe 32.

[0025] Specifically, Figure 3 As shown, the moving mechanism 33 includes a convex structure consisting of a cylinder and a platform. The top surface of the cylinder is provided with a first sensor 333, and the platform is provided with a second sensor 334. Figure 3 The driver 31 can be composed of two parts (i.e., an upper driving part and a lower driving part). The upper driving part is arranged at the bottom of the platform of the moving mechanism 33 and moves with the movement of the moving mechanism 33. The lower driving part is arranged in the strip guide tube 3 and its position does not move. The upper driving part and the lower driving part can be connected by a telescopic rod or a telescopic spring, and the moving mechanism 33 is pushed to move by the extension and contraction of the telescopic rod or the telescopic spring.

[0026] When using the measuring device, the strip catheter 3 needs to be introduced into the esophagus first, and the strip catheter 3 needs to be in contact with the esophageal wall 2 to facilitate measurement. After the strip catheter 3 is in contact with the esophageal wall 2, the driver 31 can be used to push the moving mechanism 33 in the strip catheter 3 out of the strip catheter 3, so that the first sensor 333 and the second sensor 334 on the moving mechanism 33 are exposed from the strip catheter 3 and in contact with the esophageal wall 2, thereby collecting pressure data. Similarly, when the driver 31 is pulling back the moving mechanism 33 into the strip catheter 3, the first sensor 333 and the second sensor 334 on the moving mechanism 33 will also collect corresponding pressure data. In the entire process from the moving mechanism 33 being pushed out of the strip catheter 3 to being pulled back into the strip catheter 3, the first pressure sensor and the second pressure sensor will collect corresponding pressure data, so that the first pressure sensor and the second pressure sensor can obtain corresponding pressure data curves. The processing device calculates the final atrial pressure data based on the pressure data curve and the wall thickness data, combined with the preset interval distance, the depression depth of the moving mechanism 33, and the contact area between the moving mechanism 33 and the esophageal wall 2.

[0027] It should be noted that the driver 31 can push or pull back the moving mechanism 33 according to a preset program to control the moving speed, moving distance, moving time, etc. of the moving mechanism 33, or other manual control methods can be used.

[0028] Among them, the use of the strip-shaped catheter 3 can facilitate the entire measuring device to be inserted into the esophagus, and the strip-shaped catheter 3 can obtain the maximum contact area with the esophageal wall 2, thereby increasing the friction between the entire measuring device and the esophageal wall 2, so that the strip-shaped catheter 3 can be effectively attached to the esophageal wall 2. Furthermore, the strip-shaped catheter 3 can have a certain degree of flexibility, for example, it can be made of a flexible resin or other material, which can facilitate the movement of the entire measuring device in the esophagus and reduce the risk of damaging the esophagus.

[0029] The above-mentioned device arranges the moving mechanism 33 and the ultrasonic probe 32 in the strip catheter 3, then sends the strip catheter 3 into the esophageal wall 2, and pushes the moving mechanism 33 out of the strip catheter 3 through the driver 31, so that the first sensor 333 and the second sensor 334 on the moving mechanism 33 can contact the esophageal wall 2 and squeeze the esophageal wall 2 to contact the atrium, so that the first sensor 333 and the second sensor 334 can collect pressure data at their respective positions, and then the processing device combines the wall thickness data and pressure data collected by the ultrasonic probe 32 to calculate the atrial pressure, and the moving mechanism 33 can be pulled back into the strip catheter 3 by the driver 31 after the measurement is completed. The entire measurement process will not cause damage to the esophageal wall 2, thereby achieving the purpose of obtaining the atrial pressure in a non-invasive manner.

[0030] Furthermore, in one embodiment, a hemispherical pressure head can be set on the first sensor 333 as a pressure head. The first sensor 333 is set on the top surface of the cylinder in the convex structure, and then the hemispherical pressure head is set on the first sensor 333. The pressure head contacts the esophageal wall 2. When the pressure head squeezes the esophageal wall 2, the first sensor 333 also collects pressure data accordingly. Setting a hemispherical pressure head can increase the contact area with the esophageal wall 2 and prevent damage to the esophageal wall 2 during the depression process.

[0031] After the first sensor 333 and the second sensor 334 collect pressure data and the ultrasonic probe 32 collects wall thickness data, there is no unique way to calculate the left atrial pressure based on the pressure data and the wall thickness data. Specifically, in one embodiment, the left atrial pressure can be calculated based on a corresponding formula, which can be:

[0032]

[0033] In the above formula, p is the contact pressure between the pressure head and the atrial wall and the esophageal wall 2, E is the effective elastic modulus of the combination of the atrial wall and the esophageal wall, R is the radius of the hemispherical pressure head, δ is the depth of penetration at a certain moment, V is the Poisson's ratio of the skin, S is the cross-sectional area of ​​the pressure head, and P cavity is the atrial pressure.

[0034] It should be noted that in formula (2-1), the effective elastic modulus E of the combination of the atrial wall and the esophageal wall 2 can be calculated by the following formula:

[0035] E=K*H+b (2-2)

[0036] K and b are the function constants of the experimentally measured effective elastic modulus E of the atrial wall and esophageal wall and the thickness H of the atrial wall and esophageal wall.

[0037] Specifically, formula (2-1) can be derived through corresponding derivation, wherein the derivation process is as follows:

[0038] The atrial wall and the esophageal surface (z = 0) will be displaced as the pressure head is pressed in. The atrial wall and the esophagus in the contact area are tightly combined with the pressure head, and the morphology is consistent with the ball head. The displacement distribution can be characterized by the following formula:

[0039]

[0040] The surface boundary conditions of the semi-infinite body are:

[0041]

[0042] The balance condition of the pressure head is:

[0043] ∫∫p(r)rdrdθ+S*P cavity=P,Ω∈{r|r≤a} (2-5) Taking the axis symmetry as the problem, the normal load displacement of the indenter surface is:

[0044]

[0045]

[0046] Comparing formula (2-3) with formula (2-6), we can get:

[0047]

[0048]

[0049] The contact area between the indenter and the skin gradually increases. At the boundary of the contact area, the contact pressure is zero, which can be expressed as:

[0050] lim s→a p(s)=0 (2-9) According to this condition, it can be concluded that:

[0051] 2a0=a1 (2-10) Substituting the obtained contact pressure into the equilibrium equation of the pressure head, we get

[0052]

[0053] Points can be obtained:

[0054] P=2πa 2 a0+S*P cavity (2-11)

[0055] From (2-5) and (2-7), we can get:

[0056]

[0057] Where θ is the elastic constant, which can be expressed as θ = 2(1-v 2 ) / E

[0058] The expression of contact force and penetration depth can be expressed as:

[0059]

[0060] In one embodiment, Figure 3As shown, the ultrasonic probe 32 and the moving mechanism 33 are both located at the front end of the strip catheter 3, and the processing device is also used to obtain the position point on the esophageal wall 2 closest to the atrium according to the distance between each position point on the esophageal wall 2 collected by the ultrasonic probe 32 and the atrium, and control the driver 31 to drive the moving mechanism 33 to move according to the position point closest to the atrium, so that the first sensor 333, the second sensor 334 and the ultrasonic probe 32 perform pressure and wall thickness detection at the position point closest to the atrium.

[0061] The ultrasonic probe 32 and the moving mechanism 33 are adjacently arranged in the strip catheter 3. There is a certain distance between the esophageal wall 2 and the left atrium 1. Some points on the esophageal wall 2 are closer to the left atrium 1, while some points are farther away from the left atrium 1. The ultrasonic probe 32 can detect the point on the esophageal wall 2 closest to the atrium, and this point can be used as a measuring point. That is, after the front end of the strip catheter 3 is extended to this point, the measuring device can start working, and the driver 31 can push the moving mechanism 33 out of the strip catheter 3, so that the first sensor 333 and the second sensor 334 collect pressure data.

[0062] By arranging the ultrasonic probe 32 adjacent to the moving mechanism 33, the ultrasonic probe 32 is used to accurately locate the measurement position point, so that the position point of the strip catheter 3 in the esophageal wall 2 can be located, which facilitates the positioning of the strip catheter 3 in the esophageal wall 2 and can improve the accuracy of the measurement.

[0063] In one embodiment, the measuring device further includes a controller connected to the driver 31 , and the controller is used to control the driver 31 to push or pull back the moving mechanism 33 so that the first sensor 333 and the second sensor 334 are exposed or hidden in the strip-shaped conduit 3 .

[0064] The controller may be provided with a preset program, through which driving information is sent to the driver 31, and the driver 31 drives the moving mechanism 33 to move according to the driving information. For example, the driving information may include pushing time, pushing distance, pushing speed, pulling speed, pulling time, etc.

[0065] Further, in one embodiment, if Figure 4 As shown, the controller is also used to control the driver 31 to stop pushing the moving mechanism 33 for a first preset time and then continue to push the moving mechanism 33 when the second sensor 334 collects pressure data, and to control the driver 31 to pull back the moving mechanism 33 while continuing to push the moving mechanism 33 for a second preset time.

[0066] Since there is a preset spacing distance between the first sensor 333 and the second sensor 334, when the first sensor 333 contacts and depresses the esophageal wall 2, the second sensor 334 may not have contacted the esophageal wall 2. Only after the first sensor 333 depresses the esophageal wall 2 to a certain depression depth, the second sensor 334 contacts the esophageal wall 2 and collects pressure data. At this time, the driver 31 pauses for a first preset time, for example, 3s, and then continues to advance the moving mechanism 33 so that the first sensor 333 can continue to depress the esophageal wall 2. After continuing to advance for a second preset time, the driver 31 collects and pulls back the moving mechanism 33. For example, the second preset time may be 5s. The pushing and pulling back process of the driver 31 can be realized by a preset program. For example, by presetting a corresponding control program in the processing device to control the moving mechanism 33, when the strip catheter 3 contacts the esophageal wall 2 and the measuring position is determined, the preset control program starts to control the driver 31 to push the moving mechanism 33 to move, so that the moving mechanism 33 is slowly pushed out of the strip catheter 3, and the first pressure sensor on the moving mechanism 33 starts to contact the esophageal wall 2 to collect pressure data. As the moving mechanism 33 is continuously pushed forward, the depression depth of the esophageal wall 2 also slowly increases, and the pressure data measured by the first pressure sensor is also larger. When the second sensor 334 When it contacts the esophageal wall 2 and measures a small pressure, the preset program controls the driver 31 to pause for 3 seconds and then continue to push the moving mechanism 33. After continuing to push for 5 seconds, the preset program controls the driver 31 to stop pushing the moving mechanism 33 and controls the driver 31 to start pulling back the moving mechanism 33. In the process of pulling back the moving mechanism 33, the pressure data collected by the second sensor 334 becomes smaller and smaller. When the pressure data collected by the second sensor 334 is close to zero, the preset program controls the driver 31 to make the moving mechanism 33 pause for 3 seconds, and then controls the driver 31 to continue pulling back the moving mechanism 33 until the entire moving mechanism 33 is pulled back into the strip catheter 3.

[0067] By controlling the propulsion rhythm through the controller, it is possible to ensure that the pressure data collected by the first sensor 333 and the second sensor 334 are relatively accurate and stable, thereby reducing the problem of data being prone to errors during the pressure collection process.

[0068] Further, in one embodiment, if Figure 4 As shown, the controller is also used to control the driver 31 to pull back the moving mechanism 33 until the pressure data collected by the second sensor 334 reaches a preset critical value, and then the driver 31 stops pulling back the moving mechanism 33 for a first preset period of time and then continues to pull back the moving mechanism 33 to pull the moving mechanism 33 back into the strip catheter 3.

[0069] In the process of pulling back the movable mechanism 33, the depression depth slowly decreases until the pressure data collected by the second sensor 334 is close to zero (that is, the preset critical value). At this time, the driver 31 pauses for the first preset time length, such as the 3s mentioned above, and then continues to pull back the movable mechanism 33 until it is pulled back into the strip catheter 3.

[0070] refer to Figure 5 , Figure 5 It is a time pressure curve diagram, wherein F1 represents the first sensor and F2 represents the second sensor.

[0071] By controlling the pullback rhythm through the controller, it is possible to ensure that the pressure data collected by the first sensor 333 and the second sensor 334 are relatively accurate and stable, thereby reducing the problem of data being prone to errors during the pressure collection process.

[0072] In one embodiment, the measuring device further comprises a fixing member, which is disposed in the strip-shaped conduit 3 , and the moving mechanism 33 , the driver 31 and the ultrasonic probe 32 are all fixedly disposed on the fixing member.

[0073] The fixing member can be used as a support to play a supporting role. For example, when the driver 31 drives the moving mechanism 33, it needs to provide a force on the moving mechanism 33, and the fixing member can provide support for the force in the opposite direction to prevent the strip catheter 3 and the esophageal wall 2 from relative displacement during the measurement process, resulting in unsuccessful measurement. Furthermore, a circuit or the like can be added to the fixing member as an auxiliary device.

[0074] In one embodiment, Figure 4 As shown, the moving mechanism 33 includes a bearing component 335 and a moving component, the moving component is arranged on the fixed component, the bearing component 335 is arranged on the moving component, and the first sensor 333 and the second sensor 334 are arranged on the bearing component 335; the driver 31 is used to drive the moving component to move and push the bearing component 335, so that the first sensor 333 and the second sensor 334 are exposed outside the strip conduit 3 or hidden inside the strip conduit 3.

[0075] The bearing component 335 is used to bear the first sensor 333 and the second sensor 334, and is a convex structure, and is disposed on the moving component. Further, in one embodiment, the bearing component 335 includes a protrusion and a platform, the protrusion is disposed on the platform, the first sensor 333 is disposed on the protrusion, and the second sensor 334 is disposed on the platform.

[0076] In one embodiment, the moving part includes a first moving part 332 and a second moving part 331, the first moving part 332 is disposed on the fixed part, the second moving part 331 is disposed on the first moving part 332 and can move relative to the first moving part 332, and the bearing part 335 is disposed on the second moving part 331. The first moving part 332 and the second moving part 331 are cylindrical, the second moving part 331 is sleeved in the first moving part 332, and the driver 31 is disposed in the first moving part 332.

[0077] By providing the first moving member 332 and the second moving member 331 , the driver 31 can be driven more easily, and the entire structure can be more compact, so that the space is fully utilized and the space occupied by the driver 31 is reduced.

[0078] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0079] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A device for measuring atrial pressure, characterized in that: The device comprises: a strip-shaped catheter, a first sensor, a second sensor, a moving mechanism, a driver, an ultrasonic probe and a processing device; The strip-shaped catheter is used to be introduced into the esophagus, and the moving mechanism, the driver and the ultrasonic probe are arranged in the strip-shaped catheter; The moving mechanism is provided with the first sensor and the second sensor; The driver is used to drive the moving mechanism to move so that the first sensor and the second sensor are exposed outside the strip-shaped conduit or hidden inside the strip-shaped conduit; The first sensor and the second sensor have a preset spacing distance along the moving direction of the moving mechanism. When the first sensor is exposed outside the strip-shaped catheter and presses the esophageal wall to contact the atrium, it collects pressure data at the location; when the second sensor is exposed outside the strip-shaped catheter and presses the esophageal wall to contact the atrium, it collects pressure data at the location; The ultrasonic probe is used to collect the wall thickness data of the esophagus wall and the atrium; The processing device is connected to the first sensor, the second sensor and the ultrasonic probe, and is used to obtain atrial pressure data according to the pressure data collected by the first pressure sensor, the pressure data collected by the second sensor and the wall thickness data collected by the ultrasonic probe; The calculation formula of the atrial pressure data is: =( ) / S,E=K*H+b; in, is the contact pressure between the pressure head and the atrial wall and the esophageal wall, E is the effective elastic modulus of the combination of the atrial wall and the esophageal wall, R is the radius of the hemispherical pressure head, is the penetration depth at a certain moment, V is the Poisson's ratio of the skin, S is the cross-sectional area of ​​the pressure head, P is the atrial pressure, K and b are the function constants of the experimentally measured effective elastic modulus E of the atrial wall and esophageal wall and the thickness H of the atrial wall and esophageal wall; The ultrasonic probe and the moving mechanism are both located at the front end of the strip catheter. The processing device is also used to obtain the position point on the esophageal wall closest to the atrium based on the distance between each position point on the esophageal wall collected by the ultrasonic probe and the atrium, and control the driver to drive the moving mechanism to move based on the position point closest to the atrium, so that the first sensor, the second sensor and the ultrasonic probe perform pressure and wall thickness detection at the position point closest to the atrium.

2. The measuring device according to claim 1, characterized in that The device also includes a controller connected to the driver, and the controller is used to control the driver to push or pull back the moving mechanism so that the first sensor and the second sensor are exposed or hidden in the strip-shaped conduit.

3. The measuring device according to claim 2, characterized in that The controller is also used to control the driver to stop pushing out the moving mechanism for a first preset time period and then continue to push out the moving mechanism when the second sensor collects pressure data, and to control the driver to pull back the moving mechanism while continuing to push out the moving mechanism for a second preset time period.

4. The measuring device according to claim 3, characterized in that The controller is also used to control the driver to stop pulling back the moving mechanism for a first preset time period when the pressure data collected by the second sensor reaches a preset critical value, and then continue pulling back the moving mechanism to pull the moving mechanism back into the strip-shaped conduit.

5. The measuring device according to claim 1, characterized in that It also includes a fixing part, which is arranged in the strip-shaped catheter, and the moving mechanism, the driver and the ultrasonic probe are all fixedly arranged on the fixing part.

6. The measuring device according to claim 5, characterized in that The moving mechanism comprises a bearing component and a moving component, the moving component is arranged on the fixing component, the bearing component is arranged on the moving component, and the first sensor and the second sensor are arranged on the bearing component; The driver is used to drive the moving component to move and drive the bearing component, so that the first sensor and the second sensor are exposed outside the strip-shaped conduit or hidden inside the strip-shaped conduit.

7. The measuring device according to claim 6, characterized in that The moving component includes a first moving component and a second moving component. The first moving component is disposed on the fixed component. The second moving component is disposed on the first moving component and can move relative to the first moving component. The bearing component is disposed on the second moving component.

8. The measuring device according to claim 7, characterized in that The bearing component includes a protrusion and a platform, the protrusion is arranged on the platform, the first sensor is arranged on the protrusion, and the second sensor is arranged on the platform.

9. The measuring device according to claim 7, characterized in that The first moving member and the second moving member are cylindrical, the second moving member is sleeved in the first moving member, and the driver is arranged in the first moving member.

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