End-breath carbon dioxide monitoring device

Abstract

The utility model belongs to the technical field of medical monitoring, and relates to an end-respiration carbon dioxide monitoring device which comprises a CO2 sensor, a respiration interface, a rear-end suction pump driving circuit, a rear-end suction pump, a microcontroller and a display unit, a plurality of infrared light emitting diodes, a photodiode and a gas sample chamber are arranged in the CO2 sensor; and the gas sample chamber is arranged between the infrared light emitting diode and the photodiode. According to the utility model, the collection of end-tidal carbon dioxide can be accurately controlled, the accuracy and reliability of measured data are improved, the CO2 concentration is immediately displayed by utilizing the display unit, and real-time and reliable monitoring data are provided for clinical medical personnel.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical monitoring, and in particular relates to a terminal respiratory carbon dioxide monitoring device. Background Art

[0002] End-tidal carbon dioxide (EtCO2) monitoring is an important means of evaluating a patient's respiratory function and is often used in medical fields such as anesthesia management, emergency rescue and continuous monitoring. Traditional EtCO2 monitoring devices are usually based on infrared absorption method, which detects carbon dioxide in exhaled air. However, the traditional infrared absorption method has a great impact on the ambient temperature and cannot display the EtCO2 value in real time. When designing an end-tidal carbon dioxide monitoring device with a rear-end suction pump, the rear-end suction pump drive circuit is one of the key components. The main function of the drive circuit is to control the start, stop and speed regulation of the suction pump to ensure that the suction pump can work at the right time and at the right speed, so as to accurately extract the end-tidal gas sample to the CO2 sensor for analysis. Since the instability of the respiratory airflow may lead to inaccurate measurement results, the existing technology has certain limitations in the process of collecting sample gas. Therefore, an improved EtCO2 monitoring device is needed to achieve accurate extraction of respiratory gas and provide more accurate and reliable monitoring data. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a terminal carbon dioxide monitoring device, including a CO2 sensor, a breathing interface, a rear-end suction pump driving circuit, a rear-end suction pump, a microcontroller and a display unit;

[0004] The CO2 sensor is equipped with several infrared light-emitting diodes, photodiodes and gas sample chambers;

[0005] The gas sample chamber is arranged between the infrared light emitting diode and the photodiode;

[0006] The output end of the photodiode is electrically connected to the input end of the microcontroller; the microcontroller is electrically connected to the display unit;

[0007] The microcontroller is connected to the input end electrical signal of the rear suction pump through the rear suction pump driving circuit;

[0008] One end of the rear suction pump is arranged in the gas sample chamber, and the other end is connected to the breathing interface.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, a filter is arranged between the infrared light emitting diode and the photodiode.

[0011] Furthermore, the rear-end suction pump driving circuit includes a motor driving IC chip; the microcontroller is connected to the rear-end suction pump electrical signal through the motor driving IC chip.

[0012] Furthermore, the rear suction pump is provided with a rotation speed sensor; the output end of the rotation speed sensor is electrically connected to the input end of the microcontroller.

[0013] Furthermore, a temperature and humidity sensor is also provided in the gas sample chamber; the output end of the temperature and humidity sensor is electrically connected to the input end of the microcontroller.

[0014] Furthermore, the device also includes a power supply module; the power supply module is electrically connected to the motor drive IC chip and the microcontroller respectively.

[0015] Furthermore, the display unit is a touch display screen.

[0016] Furthermore, the microcontroller is an MCU mainboard.

[0017] Furthermore, the rear end suction pump is a DC motor suction pump or a stepper motor suction pump.

[0018] The beneficial effects of the utility model are: the utility model can accurately control the collection of end-tidal carbon dioxide, improve the accuracy and reliability of measurement data, use the display unit to instantly display the CO2 concentration, and provide real-time and reliable monitoring data for clinical medical staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The schematic diagram of the end-tidal carbon dioxide monitoring device provided in Example 1 of the utility model;

[0020] Figure 2 Schematic diagram of the CO2 sensor.

[0021] Icon: T1-CO2 sensor; T2-speed sensor; H-breathing interface; Q-rear-end suction pump drive circuit; M-rear-end suction pump; U1-microcontroller; U2-motor drive IC chip; L-display unit; J1-power interface; J2-rear-end suction pump driver interface. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] To solve the above technical problems, Figure 1 As shown, this embodiment provides a terminal carbon dioxide monitoring device, including a CO2 sensor T1, a respiratory interface H, a rear suction pump driving circuit Q, a rear suction pump M, a microcontroller U1 and a display unit L;

[0024] The CO2 sensor T1 is provided with a number of infrared light emitting diodes D1, a photodiode D2 and a gas sample chamber S;

[0025] The gas sample chamber is arranged between the infrared light emitting diode D1 and the photodiode D2;

[0026] The output end of the photodiode D2 is electrically connected to the input end of the microcontroller U1; the microcontroller U1 is electrically connected to the display unit L;

[0027] The microcontroller is connected to the input terminal electrical signal of the rear suction pump M through the rear suction pump driving circuit Q;

[0028] One end of the rear suction pump M is arranged in the gas sample chamber S, and the other end is connected to the breathing interface H.

[0029] Optional, as attached Figure 1 As shown, a filter is arranged between the infrared light emitting diode D1 and the photodiode D2.

[0030] In actual application, the CO2 sensor uses the principle of infrared absorption to detect the CO2 concentration in the patient's exhaled breath, and the rear-end suction pump draws the patient's respiratory gas into the gas sample chamber S of the CO2 sensor through the breathing interface.

[0031] The CO2 sensor uses the absorption of infrared rays when passing through the gas sample to detect the concentration of CO2. When the exhaled gas passes through the sample chamber, the infrared rays pass through the sample chamber and are received by the photodiode. The CO2 concentration can be obtained by calculating the amount of infrared rays absorbed.

[0032] The rear-end suction pump driving circuit is used to control the start, stop and speed regulation of the suction pump to ensure the accuracy of the collected gas samples.

[0033] The utility model can accurately control the collection of end-tidal carbon dioxide, improve the accuracy and reliability of measurement data, utilize the display unit to instantly display the CO2 concentration, and provide clinical medical staff with real-time and reliable monitoring data.

[0034] Optionally, the rear-end suction pump driving circuit includes a motor driving IC chip; the microcontroller is connected to the rear-end suction pump electrical signal through the motor driving IC chip.

[0035] The microcontroller unit drives the rear-end suction pump via a motor driver IC chip, and can adjust the speed of the suction pump to achieve precise control of respiratory gas collection.

[0036] Optionally, the rear suction pump is provided with a rotation speed sensor; the output end of the rotation speed sensor is electrically connected to the input end of the microcontroller.

[0037] Optionally, a temperature and humidity sensor is further provided in the gas sample chamber; the output end of the temperature and humidity sensor is electrically connected to the input end of the microcontroller.

[0038] In actual application, by setting up temperature and humidity sensors, the impact of ambient temperature changes on measurement results can be monitored, which helps to improve the accuracy of EtCO2.

[0039] Optionally, the device also includes a power supply module; the power supply module is electrically connected to the motor driver IC chip and the microcontroller respectively.

[0040] As attached Figure 2 As shown, the power interface J1 is set in the rear suction pump drive circuit; the power supply is connected to the power interface J1. The power interface J1 is connected to the microcontroller U1, the CO2 sensor T1 and the speed sensor T2. The rear suction pump driver interface J2 is connected to the motor driver IC chip U2 and the microcontroller U1.

[0041] As attached Figure 2 As shown, the output end of the speed sensor T2 is connected to the microcontroller U1.

[0042] In actual application, the speed sensor collects speed data as a feedback signal. By monitoring the actual speed, it is helpful to accurately control the suction speed of the rear-end suction pump to achieve closed-loop control.

[0043] The power module can meet the power supply requirements of the monitoring device and provide a stable and continuous power supply for the monitoring device.

[0044] Optionally, the display unit is a touch screen.

[0045] Optionally, the microcontroller is an MCU mainboard.

[0046] Optionally, the rear-end suction pump is a DC motor suction pump or a stepper motor suction pump.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for monitoring end-tidal carbon dioxide, characterized in that: It includes a CO2 sensor, a breathing interface, a rear suction pump driving circuit, a rear suction pump, a microcontroller and a display unit; The CO2 sensor is equipped with several infrared light-emitting diodes, photodiodes and gas sample chambers; The gas sample chamber is arranged between the infrared light emitting diode and the photodiode; The output end of the photodiode is electrically connected to the input end of the microcontroller; the microcontroller is electrically connected to the display unit; The microcontroller is connected to the input terminal electrical signal of the rear suction pump through the rear suction pump driving circuit; One end of the rear suction pump is arranged in the gas sample chamber, and the other end is connected to the breathing interface.

2. The end-tidal carbon dioxide monitoring device according to claim 1, characterized in that: A filter is arranged between the infrared light emitting diode and the photodiode.

3. The end-tidal carbon dioxide monitoring device according to claim 1, characterized in that: The rear suction pump driving circuit includes a motor driving IC chip; the microcontroller is connected to the rear suction pump electrical signal through the motor driving IC chip.

4. The end-tidal carbon dioxide monitoring device according to claim 1, characterized in that: The rear suction pump is provided with a rotation speed sensor; the output end of the rotation speed sensor is connected with the input end of the microcontroller by electrical signal.

5. The end-tidal carbon dioxide monitoring device according to claim 1, characterized in that: A temperature and humidity sensor is also arranged in the gas sample chamber; the output end of the temperature and humidity sensor is connected with the input end of the microcontroller via an electrical signal.

6. The end-tidal carbon dioxide monitoring device according to claim 1, characterized in that: It also includes a power module; the power module is connected to the motor drive IC chip and the microcontroller electrical signal respectively.

7. The end-tidal carbon dioxide monitoring device according to claim 1, characterized in that: The display unit is a touch screen.

8. The end-tidal carbon dioxide monitoring device according to claim 1, characterized in that: The microcontroller is the MCU main board.

9. The end-tidal carbon dioxide monitoring device according to claim 1, characterized in that: The rear end suction pump is a DC motor suction pump or a stepper motor suction pump.

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