Uterine cavity pressure detection sensor and steam ablation equipment

Abstract

The invention relates to the technical field of medical instruments, and provides a uterine cavity pressure detection sensor and a steam ablation device, the uterine cavity pressure detection sensor comprises a thermocouple and a circuit board; the thermocouple is configured to be arranged at a steam outlet of the steam ablation equipment so as to collect a temperature signal of steam output by the steam outlet; the circuit board comprises a signal conditioning unit, an arithmetic unit and a signal output unit, and the thermocouple, the signal conditioning unit, the arithmetic unit and the signal output unit are electrically connected in sequence; wherein the signal conditioning unit is used for preprocessing temperature signals collected by the thermocouple, the operation unit is used for converting the preprocessed temperature signals into pressure signals of water vapor pressure in the uterine cavity, and the signal output unit is used for outputting the pressure signals. According to the uterine cavity pressure detection sensor disclosed by the invention, the adopted thermocouple has the characteristics of small size and high temperature resistance, and real-time detection on the pressure of water vapor in the uterine cavity can be realized in steam ablation treatment under the cooperation of the circuit board.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a uterine cavity pressure detection sensor and a steam ablation device. Background Art

[0002] Currently, in the medical industry, the use of steam latent heat to ablate diseased tissues or cells is widely used due to its low cost and simple surgical operation. This treatment method is also suitable for diseases inside the uterus, such as uterine fibroids, chocolate cysts, adenomyomas, abnormal endometrial bleeding and other symptoms.

[0003] In practice, it has been found that due to the unique structure of the uterus, the fallopian tubes on both sides connect to the ovaries. Since steam vapor is hot and has a certain pressure, it is necessary to ensure that the water vapor pressure in the uterine cavity remains within a set range during steam ablation treatment. Exceeding this range will cause the fallopian tubes to open, and the high-temperature water vapor will cause collateral tissue damage. Therefore, during steam ablation treatment, it is particularly necessary to accurately measure the pressure information of the uterine cavity in the steam environment.

[0004] However, existing pressure sensors generally have the problems of large size and low operating temperature, making them difficult to be applied to the pressure detection of water vapor in the uterine cavity. Summary of the Invention

[0005] The present invention provides a uterine cavity pressure detection sensor and a steam ablation device, which are used to at least solve or improve the problem that the existing pressure sensor is difficult to be applied to the pressure detection of water vapor in the uterine cavity.

[0006] In a first aspect, the present invention provides a uterine cavity pressure detection sensor, comprising: a thermocouple, configured to be disposed at a steam outlet of the steam ablation device to collect a temperature signal of water vapor outputted from the steam outlet; A circuit board comprises a signal conditioning unit, an operation unit and a signal output unit, wherein the thermocouple, the signal conditioning unit, the operation unit and the signal output unit are electrically connected in sequence; Among them, the signal conditioning unit is used to preprocess the temperature signal collected by the thermocouple, the calculation unit is used to convert the preprocessed temperature signal into a pressure signal of the water vapor pressure in the uterine cavity, and the signal output unit is used to realize the output of the pressure signal.

[0007] According to the uterine cavity pressure detection sensor provided by the present invention, a plurality of thermocouples are provided, and the plurality of thermocouples are sequentially connected in series and then electrically connected to the signal conditioning unit.

[0008] According to a uterine cavity pressure detection sensor provided by the present invention, the plurality of thermocouples are configured to be arranged around the steam outlet, and / or the number of the thermocouples is set to 3-8.

[0009] According to a uterine cavity pressure detection sensor provided by the present invention, the thermocouple includes: A temperature measuring head having a temperature sensing side and a connection side; two temperature measuring wires, the two temperature measuring wires being made of different materials, the first ends of the two temperature measuring wires being electrically connected to the connection side respectively, and the second ends of the two temperature measuring wires being electrically connected to the signal conditioning unit respectively; Wherein, the diameter of the temperature measuring head is not greater than 0.7 mm, and the diameter of the temperature measuring wire is not greater than 0.3 mm.

[0010] According to a uterine cavity pressure detection sensor provided by the present invention, the computing unit converts the temperature signal into a pressure signal in the uterine cavity using the following formula: T=100+0.28P; Wherein, T is the temperature in the uterine cavity, and P is the relative pressure in the uterine cavity relative to the standard atmospheric pressure.

[0011] According to a uterine cavity pressure detection sensor provided by the present invention, the signal conditioning unit includes: a filter circuit, the filter circuit being electrically connected to the thermocouple to filter the temperature signal collected by the thermocouple; a signal amplifying circuit, the signal amplifying circuit being electrically connected to the filtering circuit to amplify the filtered temperature signal; An analog-to-digital conversion module is electrically connected to the signal amplification circuit to perform analog-to-digital conversion on the temperature signal after signal amplification, and transmit the temperature signal after analog-to-digital conversion to the operation unit.

[0012] According to a uterine cavity pressure detection sensor provided by the present invention, the signal conditioning unit further includes: a temperature compensation module, which is used to provide a compensation voltage at the output end of the signal amplification circuit to perform temperature compensation on the cold end of the thermocouple.

[0013] According to a uterine cavity pressure detection sensor provided by the present invention, the signal output unit includes a digital signal output interface, and the digital signal output interface is configured to be communicatively connected with a control module of a steam ablation device.

[0014] According to a uterine cavity pressure detection sensor provided by the present invention, the digital signal output interface includes any one of a UART interface, an SPI interface, an IIC interface, a USB interface, a CAN interface and an RS485 interface.

[0015] In a second aspect, the present invention further provides a steam ablation device, comprising: A steam ablation handle, wherein the steam ablation handle has a steam outlet, and the steam outlet is used to deliver water vapor into the uterine cavity; In the uterine cavity pressure detection sensor as described above, the thermocouple is provided at the steam outlet.

[0016] The uterine cavity pressure detection sensor and steam ablation device provided by the present invention can be configured with a thermocouple and a circuit board, and the thermocouple can be arranged at the steam outlet of the steam ablation device. When steam ablation treatment is performed on diseases in the uterine cavity, the thermocouple can accurately collect the temperature of the water vapor output from the steam outlet, and the thermocouple can be miniaturized. The setting of the thermocouple will not cause discomfort to the human body. The temperature signal collected by the thermocouple can be converted into a pressure signal of the water vapor in the uterine cavity through the calculation unit after preprocessing by the signal conditioning unit, and the converted pressure signal is output through the signal output unit.

[0017] It can be seen that the uterine cavity pressure detection sensor shown in the present invention uses a thermocouple with the characteristics of small size and high temperature resistance. This uterine cavity pressure detection sensor overcomes the common problems of large size and low operating temperature of existing pressure sensors, and can realize real-time detection of water vapor pressure in the uterine cavity during steam ablation treatment with the cooperation of the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a control structure block diagram of the uterine cavity pressure detection sensor provided by the present invention.

[0020] Figure 2 It is a structural schematic diagram of the thermocouple provided by the present invention.

[0021] Reference numerals: 1. Thermocouple; 11. Temperature measuring head; 12. Temperature measuring wire; 2. Circuit board; 21. Signal conditioning unit; 22. Operation unit; 23. Signal output unit; 221. Filter circuit; 222. Signal amplification circuit; 223. Analog-to-digital conversion module; 224. Temperature compensation module. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0023] The following combination Figure 1-Figure 2 , the uterine cavity pressure detection sensor and steam ablation device provided by the embodiments of the invention are described in detail through specific embodiments and their application scenarios.

[0024] In the first aspect, Figure 1 As shown, an embodiment of the present invention provides a uterine cavity pressure detection sensor, comprising: Thermocouple 1 is configured to be disposed at the steam outlet of the steam ablation device to collect a temperature signal of water vapor outputted from the steam outlet; The circuit board 2 includes a signal conditioning unit 21, an operation unit 22 and a signal output unit 23, and the thermocouple 1, the signal conditioning unit 21, the operation unit 22 and the signal output unit 23 are electrically connected in sequence; Among them, the signal conditioning unit 21 is used to preprocess the temperature signal collected by the thermocouple 1, the calculation unit 22 is used to convert the preprocessed temperature signal into a pressure signal of the water vapor pressure in the uterine cavity, and the signal output unit 23 is used to realize the output of the pressure signal.

[0025] As you can understand, a thermocouple 1 is a sensor used to measure temperature. It is based on the Seebeck effect, which states that when two dissimilar metals or alloys are connected and a certain amount of heat is applied to the connection point, the two metals or alloys can generate an electromotive force that reflects the temperature. The higher the temperature of the connection point, the greater the electromotive force. Within a certain range, there is a good linear relationship between the electromotive force and the temperature of the connection point.

[0026] In practical applications, based on the temperature measurement principle of thermocouple 1, thermocouple 1 can be miniaturized and can achieve temperature acquisition over a wide temperature range. Depending on the selection of thermoelectrode materials, thermocouple 1 includes T-type thermocouple 1, E-type thermocouple 1, and K-type thermocouple 1. The maximum detection temperature of T-type thermocouple 1 can reach 350°C, the maximum detection temperature of E-type thermocouple 1 can reach 900°C, and the maximum temperature of K-type thermocouple 1 can reach 1300°C.

[0027] Considering that when performing steam ablation treatment for intrauterine conditions, the water vapor pressure must be controlled below the pressure required to open the fallopian tubes, which is typically below 70 mmHg (9.33 kPa). The corresponding water vapor temperature at 70 mmHg is 102.524°C. For safety reasons, the water vapor pressure must be controlled below 50 mmHg (6.67 kPa). The corresponding water vapor temperature at 50 mmHg is 101.8°C. Clearly, the temperature measurement range of thermocouple 1 fully meets the requirements for detecting the temperature of water vapor output from the steam outlet. Furthermore, because thermocouple 1 can be miniaturized, its placement at the steam outlet and steam ablation treatment for intrauterine conditions based on the water vapor output from the steam outlet will not cause discomfort to the human body.

[0028] During steam ablation treatment of intrauterine conditions, circuit board 2 is configured to be disposed outside the human body. Conductive contacts may be provided on circuit board 2, and thermocouple 1 is electrically connected to signal conditioning unit 21 via the conductive contacts. Circuit board 2 may be a PCB or a flexible printed circuit board, with signal conditioning unit 21, computing unit 22, and signal output unit 23 each integrated on the substrate of circuit board 2.

[0029] The signal conditioning unit 21 can perform preprocessing including filtering, signal amplification, waveform shaping, analog-to-digital conversion, etc. on the temperature signal collected by the thermocouple 1, so that the temperature signal processed by the signal conditioning unit 21 can meet the signal processing requirements of the operation unit 22.

[0030] The calculation unit 22 may be a central processing unit (CPU), and the calculation unit 22 calculates a pressure signal reflecting water vapor in the uterine cavity according to a mapping function of temperature and pressure. The signal output unit 23 may be a signal output interface to output the pressure signal.

[0031] The uterine cavity pressure detection sensor shown in the present invention can be configured with a thermocouple 1 and a circuit board 2, and the thermocouple 1 can be arranged at the steam outlet of the steam ablation equipment. When steam ablation treatment is performed on diseases in the uterine cavity, the thermocouple 1 can accurately collect the temperature of the water vapor output from the steam outlet, and the thermocouple 1 can be miniaturized. The setting of the thermocouple 1 will not cause discomfort to the human body. The temperature signal collected by the thermocouple 1 can be converted into a pressure signal of the water vapor in the uterine cavity through the operation unit 22 after preprocessing by the signal conditioning unit 21, and the converted pressure signal is output through the signal output unit 23.

[0032] It can be seen that the uterine cavity pressure detection sensor shown in the present invention uses a thermocouple 1 with the characteristics of small size and high temperature resistance. This uterine cavity pressure detection sensor overcomes the common problems of large size and low operating temperature of existing pressure sensors, and can realize real-time detection of water vapor pressure in the uterine cavity during steam ablation treatment with the cooperation of the circuit board 2.

[0033] In some embodiments, a plurality of thermocouples 1 are provided, and the plurality of thermocouples 1 are sequentially connected in series and then electrically connected to the signal conditioning unit 21 .

[0034] It is understood that the accuracy of detecting the temperature of the water vapor can be improved by providing multiple thermocouples 1. In practical applications, the total electromotive force output by multiple thermocouples 1 connected in series divided by the number of thermocouples 1 can represent the actual temperature of the water vapor.

[0035] In some embodiments, multiple thermocouples 1 are configured to be arranged around the steam outlet. This design not only meets the temperature detection requirements of the water vapor output from the steam outlet, ensuring that the setting of the thermocouple 1 will not affect the normal output of water vapor from the steam outlet, but also can minimize the differences in the temperatures detected by different thermocouples 1, thereby improving the accuracy of the temperature detection of water vapor.

[0036] In some embodiments, in order to take into account the temperature detection accuracy of the thermocouple 1 while reducing the space occupied by the thermocouple 1, the number of thermocouples 1 is set to 3-8, for example, the number of thermocouples 1 is 3, 4, 5, 6, 7 or 8.

[0037] In some embodiments, as Figure 1 and Figure 2 As shown, the thermocouple 1 includes: a temperature measuring head 11 and two temperature measuring wires 12; the temperature measuring head 11 has a temperature sensing side and a connection side; the two temperature measuring wires 12 are made of different materials, the first ends of the two temperature measuring wires 12 are electrically connected to the connection sides, and the second ends of the two temperature measuring wires 12 are electrically connected to the signal conditioning unit 21; wherein, the diameter of the temperature measuring head 11 is not greater than 0.7 mm, and the diameter of the temperature measuring wires 12 is not greater than 0.3 mm.

[0038] It is understood that the temperature measuring head 11 can be a heat-conducting metal piece, which can be a stainless steel sheet or a titanium alloy sheet. The connection side of the temperature measuring head 11 can be connected to the first ends of the two temperature measuring wires 12 by laser welding, micro-spot resistance welding, or nano-silver sintering.

[0039] At the same time, for the two temperature measuring wires 12 of the thermocouple 1, one temperature measuring wire 12 can be made of a nickel-chromium alloy, and the other temperature measuring wire 12 can be made of a nickel-silicon alloy. This design can form a K-type thermocouple 1. Of course, one temperature measuring wire 12 of the thermocouple 1 can also be made of a nickel-chromium alloy, and the other temperature measuring wire 12 can be made of a copper-nickel alloy. This design can form an E-type thermocouple 1. The thermocouple 1 also has other structural forms based on the material selection of the two temperature measuring wires 12, which will not be detailed here.

[0040] Furthermore, by configuring the diameters of the temperature measuring head 11 and the temperature measuring wire 12, the miniaturized design of the thermocouple 1 can be further realized, wherein the diameter of the temperature measuring head 11 can be 0.5-0.7 mm, and the diameter of the temperature measuring wire 12 can be 0.1-0.3 mm, without specific limitation.

[0041] In some embodiments, the calculation unit 22 converts the temperature signal into a pressure signal of water vapor in the uterine cavity using the following formula: T=100+0.28P; Where T is the temperature in the uterine cavity, and P is the relative pressure in the uterine cavity relative to the standard atmospheric pressure.

[0042] It is understandable that in a confined space, the boiling point of water changes with the pressure of the space. The greater the pressure, the higher the boiling point. This characteristic can be characterized by the following Clausius-Clapeyron equation: In the above formula, P1 and P2 are two different pressures, measured in KPa (kilopascals); T1 is the boiling point of water at P1, measured in K (Kelvin); T2 is the boiling point of water at P2, measured in K (Kelvin); ∆vapHm is a whole number representing the molar vaporization enthalpy of the liquid, typically 40.67 kJ / mol; and R is the ideal gas constant, 8.314 J / (mol·K).

[0043] As is known to all, the boiling point of water at a standard atmospheric pressure of 101.325 kPa is 373.15 K. Substituting this known quantity into the above formula, performing unit conversion, and taking approximate values, we obtain the formula for the change of water vapor with pressure: T=100+0.28P. According to this formula, for every increase of 1 kPa in relative pressure, the boiling point of water increases by 0.28°C, that is, the temperature of the water vapor output from the steam outlet increases by 0.28°C. This places higher requirements on the detection accuracy of the thermocouple 1, so the present invention adopts the form of connecting the thermocouple 1 in series for temperature detection in the above embodiment.

[0044] At the same time, according to the formula T=100+0.28P, under a pressure environment of 70 mmHg, the corresponding water vapor temperature is 102.524°C, and under a pressure environment of 50 mmHg, the corresponding water vapor temperature is 101.823°C. Therefore, when performing steam ablation treatment on the uterine cavity, in order to avoid excessive water vapor pressure from breaking open the fallopian tube, the temperature detected by thermocouple 1 must not exceed 101.8°C.

[0045] In some embodiments, as Figure 1 As shown, the signal conditioning unit 21 includes: a filter circuit 221, a signal amplifying circuit 222 and an analog-to-digital conversion module 223; The filtering circuit 221 is electrically connected to the thermocouple 1 to filter the temperature signal collected by the thermocouple 1; the signal amplifying circuit 222 is electrically connected to the filtering circuit 221 to amplify the filtered temperature signal; the analog-to-digital conversion module 223 is electrically connected to the signal amplifying circuit 222 to perform analog-to-digital conversion on the amplified temperature signal, and transmit the analog-to-digital converted temperature signal to the operation unit 22.

[0046] It is understood that the filter circuit 221 is adapted to the thermocouple 1 and is used to preliminarily filter out interference on the transmission line of the temperature signal collected by the thermocouple 1. The filter circuit 221 may be a first-order low-pass filter circuit or a multi-order low-pass filter circuit, or a single-power active filter circuit, without specific limitation.

[0047] Since the voltage output by thermocouple 1 is a very weak signal, it cannot be directly processed. To improve accuracy and facilitate data processing and calculation, a signal amplifier circuit 222 is used to amplify the filtered temperature signal. The signal amplifier circuit 222 can be a linear signal amplifier circuit such as a common-emitter amplifier circuit, a differential amplifier circuit, an operational amplifier circuit, or a field-effect transistor amplifier circuit.

[0048] The analog-to-digital conversion module 223 can use an ADC chip to convert the analog signal representing the temperature signal output by the signal amplification circuit 222 into a digital signal, so that the operation unit 22 receives the digital signal and processes the digital signal based on the logic processing program of T=100+0.28P to convert the temperature signal into a pressure signal (pressure value) of water vapor in the uterine cavity.

[0049] In practical applications, considering that the amplified temperature signal output by the signal amplification circuit 222 carries the noise inside the amplification circuit, and due to the influence of the amplifier bias voltage and bias current, there is a certain error between the actual signal and the true temperature signal, a waveform shaping module can be set between the signal amplification circuit 222 and the analog-to-digital conversion module 223. The waveform shaping module eliminates the noise and errors caused by the bias voltage and bias current, and restores the true signal as much as possible.

[0050] In some embodiments, the signal conditioning unit 21 further includes a temperature compensation module 224 , which is configured to provide a compensation voltage at the output end of the signal amplifying circuit 222 to perform temperature compensation on the cold end of the thermocouple 1 .

[0051] It is understandable that different types of thermocouples 1 have different electromotive forces at the same temperature, and the temperature of the transmission line is also inconsistent with the temperature of the temperature measurement node, which will lead to temperature measurement errors. To be compatible with various types of thermocouples 1 and eliminate the influence of ambient temperature, a compensation voltage is added through the temperature compensation module 224. This compensation voltage is the voltage of the thermocouple 1 at 0°C. The relevant parameters can be obtained by referring to the specification sheet of the thermocouple 1. The voltage obtained by taking the difference between the electromotive force input by the thermocouple 1 and the compensation voltage is the absolute temperature of the water vapor actually collected by the thermocouple 1.

[0052] In practical applications, since the temperature signal directly detected by the thermocouple 1 is usually weak, the temperature compensation module 224 is connected to the output end of the signal amplification circuit 222 to facilitate accurate application of the compensation voltage after amplifying the temperature signal, thereby achieving the purpose of temperature compensation for the cold end of the thermocouple 1.

[0053] Among them, the temperature compensation module 224 can adopt a thermal resistor compensation module, which collects the temperature of the reference junction through an external thermal resistor (such as Pt100), which is then processed by the processing module and temperature compensation is performed. The temperature compensation module 224 can also adopt other structural forms, which are not listed here one by one.

[0054] In some embodiments, as Figure 1 As shown, the signal output unit 23 includes a digital signal output interface, which is configured to be communicatively connected with a control module of the steam ablation device.

[0055] The digital signal output interface includes any one of a UART interface, an SPI interface, an IIC interface, a USB interface, a CAN interface, and an RS485 interface.

[0056] Specifically, the UART interface is a universal asynchronous receiver / transmitter interface, which is a serial communication interface; the SPI interface is a serial peripheral interface, which is a high-speed, synchronous, serial communication bus; the IIC interface is an I2C interface (Inter-IC), which is a simple bidirectional two-wire synchronous serial bus; the USB interface is a serial bus interface, which is a widely used interface for connecting computers and other devices (such as printers, mice, mobile hard drives, etc.); the CAN interface is a controller area network interface, which is a multi-master serial communication bus commonly used in automobiles, industrial control and other fields; the RS485 interface is a commonly used bidirectional, balanced serial interface, mostly used in industrial environments, with good noise interference resistance, and can achieve long-distance, multi-node communication.

[0057] In a second aspect, an embodiment of the present invention further provides a steam ablation device, comprising: a steam ablation handle and the uterine cavity pressure detection sensor as described above; The steam ablation handle has a steam outlet, which is used to transport water vapor into the uterine cavity. The thermocouple 1 is arranged at the steam outlet.

[0058] It can be understood that since the steam ablation device includes a uterine cavity pressure detection sensor, the specific structure of the uterine cavity pressure detection sensor refers to the above embodiment, and the steam ablation device of this embodiment includes all the technical solutions of the above embodiment, and therefore has at least all the beneficial effects achieved by all the technical solutions of the above embodiment, which will not be repeated here.

[0059] In actual application, the signal output unit 23 corresponding to the uterine cavity pressure detection sensor is communicated with the control module of the steam ablation device. When the pressure detected by the uterine cavity pressure detection sensor reaches the set upper limit of 50Kpa (this pressure value is the relative pressure), the control module controls the steam ablation handle or the water vapor generator adapted to the steam ablation handle to stop delivering water vapor to avoid excessive water vapor pressure from breaking the fallopian tube, causing high-temperature water vapor to enter the fallopian tube and cause damage to the human body.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A uterine cavity pressure detection sensor, characterized in that: include: A thermocouple (1) is configured to be disposed at a steam outlet of a steam ablation device to collect a temperature signal of water vapor output from the steam outlet; A circuit board (2) comprises a signal conditioning unit (21), an operation unit (22) and a signal output unit (23), wherein the thermocouple (1), the signal conditioning unit (21), the operation unit (22) and the signal output unit (23) are electrically connected in sequence; The signal conditioning unit (21) is used to pre-process the temperature signal collected by the thermocouple (1), the computing unit (22) is used to convert the pre-processed temperature signal into a pressure signal of the water vapor pressure in the uterine cavity, and the signal output unit (23) is used to output the pressure signal.

2. The uterine cavity pressure detection sensor according to claim 1, characterized in that: A plurality of the thermocouples (1) are provided, and the plurality of thermocouples (1) are sequentially connected in series and then electrically connected to the signal conditioning unit (21).

3. The uterine cavity pressure detection sensor according to claim 2, characterized in that: The plurality of thermocouples (1) are configured to be arranged around the steam outlet, and / or the number of the thermocouples (1) is set to 3-8.

4. The uterine cavity pressure detection sensor according to claim 1, characterized in that: The thermocouple (1) comprises: A temperature measuring head (11), the temperature measuring head (11) having a temperature sensing side and a connection side; Two temperature measuring wires (12), the two temperature measuring wires (12) are made of different materials, the first ends of the two temperature measuring wires (12) are respectively electrically connected to the connection side, and the second ends of the two temperature measuring wires (12) are respectively electrically connected to the signal conditioning unit (21); The diameter of the temperature measuring head (11) is not greater than 0.7 mm, and the diameter of the temperature measuring wire (12) is not greater than 0.3 mm.

5. The uterine cavity pressure detection sensor according to claim 1, characterized in that: The computing unit (22) converts the temperature signal into the pressure signal using the following formula; T=100+0.28P; Wherein, T is the temperature in the uterine cavity, and P is the relative pressure in the uterine cavity relative to the standard atmospheric pressure.

6. The uterine cavity pressure detection sensor according to any one of claims 1 to 5, characterized in that: The signal conditioning unit (21) comprises: A filter circuit (221), the filter circuit (221) being electrically connected to the thermocouple (1) to perform filtering processing on the temperature signal collected by the thermocouple (1); a signal amplifying circuit (222), the signal amplifying circuit (222) being electrically connected to the filtering circuit (221) to perform signal amplification processing on the filtered temperature signal; An analog-to-digital conversion module (223) is electrically connected to the signal amplification circuit (222) to perform analog-to-digital conversion on the temperature signal after signal amplification, and transmit the analog-to-digital converted temperature signal to the operation unit (22).

7. The uterine cavity pressure detection sensor according to claim 6, characterized in that: The signal conditioning unit (21) further includes: A temperature compensation module (224) is used to provide a compensation voltage at the output end of the signal amplification circuit (222) to perform temperature compensation on the cold end of the thermocouple (1).

8. The uterine cavity pressure detection sensor according to any one of claims 1 to 5, characterized in that: The signal output unit (23) comprises a digital signal output interface, and the digital signal output interface is configured to be communicatively connected with a control module of the steam ablation device.

9. The uterine cavity pressure detection sensor according to claim 8, characterized in that: The digital signal output interface includes any one of a UART interface, an SPI interface, an IIC interface, a USB interface, a CAN interface and an RS485 interface.

10. A steam ablation device, characterized in that: include: A steam ablation handle, wherein the steam ablation handle has a steam outlet, and the steam outlet is used to deliver water vapor into the uterine cavity; The uterine cavity pressure detection sensor according to any one of claims 1 to 9, wherein the thermocouple (1) is provided at the steam outlet.

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