Human oral exhaled gas collecting device and method

Abstract

According to the technical scheme, the human oral cavity expired gas collecting device is characterized by comprising oral cavity gas collecting equipment; a gas collecting container, a miniature vacuum pump and an intelligent control unit are arranged in the body. According to the other technical scheme, the invention discloses a human oral cavity expired gas collecting method which is characterized in that the human oral cavity expired gas collecting device is adopted. The front sampling device is used for collecting exhaled gas only existing in the oral cavity of a human body, and is suitable for component identification of volatile organic compounds (VOC) and volatile sulfides (VSC) related to diseases in the exhaled gas of the oral cavity. According to the device disclosed by the invention, through the design of the mask and the blowing nozzle, the sealing performance and the accuracy of gas collection are ensured, and meanwhile, through intermittent extraction and a high-sensitivity carbon dioxide detection unit, the collection efficiency and the detection precision of gas are optimized.

Description

Technical Field

[0001] The invention relates to a human oral exhaled gas collection device, in particular to a disposable sampling device that can be used with various gas detection instruments, and belongs to the technical field of sample collection devices in medical equipment and hygiene. Background Art

[0002] Current exhaled gas collection devices are mainly designed to collect lung gas, but they often cannot effectively distinguish between oral gas and lung gas. In addition, most of the existing exhaled gas collection devices are designed to solve the problem of sampled gas mixing and use micro-suction pumps for automatic sampling. However, conventional samplers and baffles can only prevent external gas from entering the collection system, while micro-suction pumps cannot distinguish between oral gas and lung gas, affecting the accurate diagnosis of oral diseases. With the deepening of oral disease research, more and more studies have shown that certain specific compounds in oral gas can be used as biomarkers for oral diseases.

[0003] Therefore, there is an urgent need for a device specifically used to collect oral gas to improve the accuracy of oral disease diagnosis. The gas collection rate can be increased by adding an intelligent control system for intermittent extraction. Summary of the invention

[0004] The object of the present invention is to provide a device that can effectively distinguish and collect oral cavity gas, rather than alveolar gas or other gas in the airway.

[0005] In order to achieve the above-mentioned object, the technical solution of the present invention is to disclose a human oral exhaled air collection device, which is characterized by comprising:

[0006] An oral gas collection device is used to collect only the exhaled gas from the user's mouth after being in sealed contact with the skin around the user's mouth;

[0007] The main body is equipped with a gas collection container, a micro vacuum pump and an intelligent control unit, wherein:

[0008] The gas collection container is connected with the oral gas collection device through a gas flow channel, and a carbon dioxide detection unit is provided on the gas flow channel; the carbon dioxide detection unit is connected to the intelligent control unit, and the intelligent control unit drives the micro vacuum pump; only when the intelligent control unit detects through the carbon dioxide detection unit that the carbon dioxide concentration of the gas flowing through the gas flow channel is lower than a preset threshold value, the micro vacuum pump is driven to start, so that the micro vacuum pump works intermittently with a preset period, and the preset period is matched with the user's breathing frequency. Only when the micro vacuum pump is working, the micro vacuum pump draws the gas in the gas flow channel into the gas collection container. When the micro vacuum pump is not working, the gas in the gas flow channel cannot enter the gas collection container, so that the gas collection container collects gas when the user exhales.

[0009] Preferably, the oral gas collection device comprises a mask and a mouthpiece arranged in the mask, and when the user exhales, only the exhaled gas from the user's oral cavity is collected through the mouthpiece.

[0010] Preferably, the front end surface of the mask covers the nose and mouth of the user and is in sealing contact with the skin, thereby forming a relatively sealed space therein.

[0011] Preferably, the mouthpiece is provided in a relatively sealed space formed by the mask, and the mouthpiece is in direct contact with the user's oral cavity.

[0012] Preferably, a gas coarse filter is provided at the rear end of the mask.

[0013] Preferably, the mask and the mouthpiece are both disposable items.

[0014] Preferably, the carbon dioxide detection unit adopts a high-sensitivity carbon dioxide sensor.

[0015] Another aspect of the present invention is to disclose a method for collecting exhaled air from a human oral cavity, characterized in that the method comprises the following steps using the above-mentioned exhaled air collection device from a human oral cavity:

[0016] Step 1: Collecting the user's oral exhaled gas by an oral gas collection device;

[0017] Step 2: The intelligent control unit detects whether the carbon dioxide concentration of the gas flowing through the gas flow channel is lower than a preset threshold value through the carbon dioxide detection unit. If so, the next step is entered; otherwise, the gas flowing through the gas flow channel is continuously detected;

[0018] Step 3, the intelligent control unit drives the micro vacuum pump so that the micro vacuum pump works intermittently at a preset period, wherein the preset period matches the breathing frequency of the user;

[0019] Only when the micro vacuum pump is working, the micro vacuum pump draws the gas in the gas flow channel into the gas collection container. When the micro vacuum pump is not working, the gas in the gas flow channel cannot enter the gas collection container, so that the gas collection container collects gas when the user exhales.

[0020] Preferably, after the intelligent control unit detects the composition of the gas collected by the gas collection container, the gas composition detection data is sent to an external device.

[0021] Preferably, the intelligent control unit detects the composition of the gas collected by the gas collection container through the sensor array, and the obtained detection signal is processed by the gas signal filtering module, signal amplification module and data processing module inside the intelligent control unit to obtain final gas component detection data, and the obtained gas component detection data is sent to an external data processing device through a data interface.

[0022] The present invention is used to collect exhaled gas that only exists in the human oral cavity, and is suitable for a pre-sampling device for identifying disease-related volatile organic compounds (VOC) and volatile sulfide (VSC) components in oral exhaled gas. The device disclosed in the present invention ensures the tightness and accuracy of gas collection through the design of the mask and the mouthpiece, and optimizes the gas collection efficiency and detection accuracy through intermittent extraction and a highly sensitive carbon dioxide detection unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the device;

[0024] Figure 2 is a schematic diagram of a mask and a mouthpiece;

[0025] Figure 3 is a schematic diagram of a gas flow channel;

[0026] Figure 4 This is a schematic diagram of the system used in the present invention. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0028] like Figure 1 As shown, a human oral exhaled air collection device disclosed in an embodiment of the present invention includes an oral gas collection device 1 and a body 2, and the body 2 is connected to an external data processing device 4 (for example: PC, etc.) through a data interface 3.

[0029] The oral gas collection device 1 is used to seal the patient's oral cavity (the sealing of the gas collection must be ensured), and only collects the patient's oral exhaled gas. Figure 2 As shown, it further includes a mask 101 and a mouthpiece 102 located in the mask 101 (in this embodiment, a more preferred implementation is that the mask 101 and the mouthpiece 102 are disposable items to avoid cross infection). The front end of the mask 101 covers the patient's nose and mouth to ensure sealed contact with the skin, thereby forming a relatively sealed space inside the mask 101. The mouthpiece 102 is located in the space and is in direct contact with the patient's mouth, further improving the sealing of gas collection, ensuring that only oral gas is collected and avoiding the mixing of external air. When the user exhales, the oral exhaled gas is only delivered into the body 2 through the mouthpiece 2. A more preferred implementation is that a gas coarse filter 103 is provided at the rear end of the mask 101 for preliminarily filtering the oral exhaled gas flowing out of the mouthpiece 2 (for example, filtering saliva in the oral exhaled gas). In this embodiment, the gas coarse filter 103 uses a coarse grid.

[0030] The body 2 is provided with a gas collection container 201, a micro vacuum pump 203 and an intelligent control unit. The gas collection container 201 is connected to the gas coarse filter 103 via the gas flow channel 202, and at the same time, the gas collection container 201 is connected to the micro vacuum pump 203. Only when the micro vacuum pump 203 is turned on, the oral exhaled gas is collected by the gas collection container 201 via the gas flow channel 202. When the micro vacuum pump 203 is turned off, the oral exhaled gas cannot enter the gas collection container 201. A carbon dioxide detection unit 204 is provided on the gas flow channel 202, and the carbon dioxide detection unit 204 detects the carbon dioxide concentration in the gas flowing through the gas flow channel 202, and sends the detection value to the intelligent control unit. A more preferred embodiment is that the carbon dioxide detection unit 204 adopts a high-sensitivity carbon dioxide sensor such as a non-dispersive infrared (NDIR) sensor, which has the characteristics of high precision and fast response.

[0031] Combination Figure 3 as well as Figure 4, the intelligent control unit determines whether the real-time carbon dioxide concentration is lower than a preset threshold value (in the embodiment of the present invention, the threshold value is set to 3%) based on the detection value obtained by the carbon dioxide detection unit 204. If the real-time carbon dioxide concentration is lower than the preset threshold value, the micro vacuum pump 203 is intermittently controlled by the drive unit through the preset intermittent extraction program, so that the oral gas collected by the oral gas collection device 1 is introduced into the gas collection container 201, ensuring efficient collection of oral gas. The preset intermittent extraction program intermittently turns on the micro vacuum pump 203 at a preset period, so that intermittent extraction of oral gas can be achieved in coordination with the patient's breathing frequency, thereby improving the concentration and collection efficiency of oral gas. If the real-time carbon dioxide concentration is higher than the preset threshold value, the micro vacuum pump 203 is always kept in a closed state.

[0032] The intelligent control unit detects the composition of the gas collected by the gas collection container 201 through the sensor array, obtains the final gas composition detection data after processing by its internal gas signal filtering module, signal amplification module and data processing module, and sends the obtained gas composition detection data to the external data processing device 4 through the data interface 3.

[0033] The device of the present invention can effectively distinguish and collect oral gas, avoid mixing with lung gas, and improve the accuracy and reliability of the analysis results. The device disclosed by the present invention has a simple structure, is easy to operate, and has high practical value. Specific data show that the device can stably collect enough oral gas samples for analysis within 10 minutes, and its carbon dioxide concentration detection sensitivity reaches 0.1%, which greatly improves the accuracy of oral disease diagnosis.

Claims

1. A human oral exhaled air collection device, characterized in that: include: An oral gas collection device is used to collect only the exhaled gas from the user's mouth after being in sealed contact with the skin around the user's mouth; The main body is equipped with a gas collection container, a micro vacuum pump and an intelligent control unit, wherein: The gas collection container is connected with the oral gas collection device through a gas flow channel, and a carbon dioxide detection unit is provided on the gas flow channel; the carbon dioxide detection unit is connected to the intelligent control unit, and the intelligent control unit drives the micro vacuum pump; only when the intelligent control unit detects through the carbon dioxide detection unit that the carbon dioxide concentration of the gas flowing through the gas flow channel is lower than a preset threshold value, the micro vacuum pump is driven to start, so that the micro vacuum pump works intermittently with a preset period, and the preset period is matched with the user's breathing frequency. Only when the micro vacuum pump is working, the micro vacuum pump draws the gas in the gas flow channel into the gas collection container. When the micro vacuum pump is not working, the gas in the gas flow channel cannot enter the gas collection container, so that the gas collection container collects gas when the user exhales.

2. A human oral exhaled air collection device as claimed in claim 1, characterized in that: The oral gas collection device comprises a mask and a mouthpiece arranged in the mask. When a user exhales, only the exhaled gas from the user's oral cavity is collected through the mouthpiece.

3. A human oral exhaled air collection device as claimed in claim 2, characterized in that: The front end surface of the mask covers the nose and mouth of the user and is in sealing contact with the skin, thereby forming a relatively sealed space therein.

4. A human oral exhaled air collection device as claimed in claim 3, characterized in that: The mouthpiece is arranged in a relatively sealed space formed by the mask, and the mouthpiece is in direct contact with the user's oral cavity.

5. A human oral exhaled air collection device as claimed in claim 4, characterized in that: A gas coarse filter is provided at the rear end of the mask.

6. A human oral exhaled air collection device as claimed in claim 4, characterized in that: The face mask and the mouthpiece are both disposable items.

7. The human oral exhaled air collection device according to claim 1, characterized in that: The carbon dioxide detection unit adopts a high-sensitivity carbon dioxide sensor.

8. A method for collecting exhaled air from a human oral cavity, characterized in that: The human oral exhaled air collection device according to claim 1 comprises the following steps: Step 1: Collecting the user's oral exhaled gas by an oral gas collection device; Step 2: The intelligent control unit detects whether the carbon dioxide concentration of the gas flowing through the gas flow channel is lower than a preset threshold value through the carbon dioxide detection unit. If so, the next step is entered; otherwise, the gas flowing through the gas flow channel is continuously detected; Step 3, the intelligent control unit drives the micro vacuum pump so that the micro vacuum pump works intermittently at a preset period, wherein the preset period matches the breathing frequency of the user; Only when the micro vacuum pump is working, the micro vacuum pump draws the gas in the gas flow channel into the gas collection container. When the micro vacuum pump is not working, the gas in the gas flow channel cannot enter the gas collection container, so that the gas collection container collects gas when the user exhales.

9. A method for collecting exhaled air from a human oral cavity as claimed in claim 8, characterized in that: After the intelligent control unit detects the components of the gas collected by the gas collection container, the gas component detection data is sent to an external device.

10. A method for collecting exhaled air from a human oral cavity as claimed in claim 8, characterized in that: The intelligent control unit detects the composition of the gas collected by the gas collection container through the sensor array. The obtained detection signal is processed by the gas signal filtering module, signal amplification module and data processing module inside the intelligent control unit to obtain final gas component detection data, and the obtained gas component detection data is sent to an external data processing device through a data interface.

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