WO2023046165A1 - 分离气道的呼气末气体采集装置 - Google Patents

分离气道的呼气末气体采集装置 Download PDF

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WO2023046165A1
WO2023046165A1 PCT/CN2022/121336 CN2022121336W WO2023046165A1 WO 2023046165 A1 WO2023046165 A1 WO 2023046165A1 CN 2022121336 W CN2022121336 W CN 2022121336W WO 2023046165 A1 WO2023046165 A1 WO 2023046165A1
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airway
air
electromagnetic
way valve
gas collection
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PCT/CN2022/121336
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English (en)
French (fr)
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杨雷
罗景庭
罗邦雄
张权锋
黄锦波
黄秀松
杨丽华
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惠雨恩科技(深圳)有限公司
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Publication of WO2023046165A1 publication Critical patent/WO2023046165A1/zh

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/483—Physical analysis of biological material
    • G01N33/497—Physical analysis of biological material of gaseous biological material, e.g. breath

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  • the present application relates to the technical field of breath collection, in particular to an end-tidal gas collection device for separating airways.
  • Exhalation disease diagnosis technology is emerging as a new in vitro diagnostic technology that is parallel and complementary with blood test and imaging detection.
  • breath diagnosis disease technology is highly regarded by researchers and clinicians at home and abroad. Pay attention, the blue ocean of the relevant market can reach the level of 100 billion. Therefore, institutions at home and abroad are scrambling to develop breath testing instruments.
  • Existing breath testing instruments widely used clinically include breath testers for measuring red blood cell life span and Helicobacter pylori (Hp ) tester, exhaled nitric oxide (FENO) tester for detecting airway inflammation, etc. The use of these breath detection instruments is inseparable from the collection of breath.
  • Hp Helicobacter pylori
  • FENO exhaled nitric oxide
  • the gas at the front end of exhalation is also called cavity air. Because it is directly connected to the atmospheric environment, it is generally mixed with more air, and the measurement is greatly affected by the environment; while the gas at the end of exhalation is basically alveolar gas, which is the After blood circulation, the gas that is directly excreted through alveolar gas exchange and can carry a large amount of health status information can best reflect the current health status of the human body.
  • the object of the present invention is to provide an end-tidal gas collection device with separated airways, which can reduce the difficulty of collecting end-tidal gas.
  • an end-tidal gas collection device for separating the airway comprising:
  • the first airway includes an air inlet end and an air outlet end, an air pump and an electromagnetic three-way valve are arranged on the first airway, and the air pump and the flow limiting unit are arranged on the first airway One end of the first air channel close to the air inlet end, the electromagnetic three-way valve is arranged at the end of the first air channel close to the air outlet end;
  • a third airway one end of the third airway is connected to the electromagnetic three-way valve, and the other end is communicated with air;
  • control unit the control unit is electrically connected with the air pump, the electromagnetic three-way valve, and the exhalation state monitoring unit.
  • the exhalation state monitoring unit includes a flow sensor or a pressure sensor.
  • a flow limiting unit is further arranged on the first air passage, and the flow limiting unit is arranged at an end of the first air passage close to the inlet end.
  • the flow limiting speed of the flow limiting unit is between 40mL/min-60mL/min.
  • the flow limiting unit is a flow limiting valve or a capillary.
  • the intake end of the first airway and one end of the second airway are integrated into an exhalation collection unit.
  • the device for collecting end-tidal gas with separated airways further includes a gas collection unit, and the gas collection unit is arranged at the outlet end of the first airway.
  • the electromagnetic three-way valve includes a first port, a second port and a third port, and the first air passage communicates with the electromagnetic three-way valve through the first port and the second port.
  • One end of the third air passage is connected with the electromagnetic three-way valve through the third port.
  • the end-tidal gas collection device with separated airways includes a first airway, a second airway, a third airway and a control unit.
  • the first air passage includes an air inlet end and an air outlet end
  • an air pump and an electromagnetic three-way valve are arranged on the first air passage, and the air pump is arranged at an end of the first air passage close to the air inlet end
  • the electromagnetic three-way valve is set at one end of the first airway close to the air outlet;
  • the second airway is provided with an exhalation state monitoring unit; one end of the third airway is connected to the electromagnetic three-way valve.
  • the other end communicates with the air; the control unit is electrically connected with the air pump, the electromagnetic three-way valve, and the exhalation state monitoring unit.
  • This solution can control the electromagnetic three-way valve to be energized through the control unit when the expiration state monitoring unit detects the beginning of end-expiration, so as to achieve the purpose of collecting end-tidal gas by separating the airway and reducing the difficulty of collecting end-tidal gas .
  • Fig. 1 is a schematic structural diagram of an end-tidal gas collection device for separating airways provided in an embodiment of the present application.
  • Fig. 2 is a schematic flowchart of the method for collecting end-tidal gas with separated airways provided in the embodiment of the present application.
  • An embodiment of the present application provides an end-tidal gas collection device for separating airways, which will be described in detail below.
  • FIG. 1 is a schematic structural diagram of an end-tidal gas collection device for separating airways provided in an embodiment of the present application.
  • the end-tidal gas collection device 100 with separated airways may include a first airway 10 , a second airway 20 , a third airway 30 and a control unit 40 .
  • the first air passage 10 includes an air inlet A and an air outlet B, the first air passage 10 is provided with an air pump 11 and an electromagnetic three-way valve 12, and the air pump 11 is arranged at one end of the first air passage 10 close to the air inlet A , the electromagnetic three-way valve is arranged at one end of the first airway 10 close to the air outlet B; the second airway 20 is provided with an exhalation state monitoring unit 21; one end of the third airway 30 is connected with the electromagnetic three-way valve 12, and the other One end communicates with the air; the control unit 40 is electrically connected with the air pump 11 , the current limiting unit 13 , the electromagnetic three-way valve 12 and the exhalation state monitoring unit 21 .
  • the exhalation state monitoring unit 21 may include a flow sensor or a pressure sensor.
  • the flow sensing device or the pressure sensing device are all sensitive sensing devices, and the flow sensing device or pressure sensor can determine the current exhalation state according to the change of gas flow or pressure in the second airway 20 .
  • the first air passage 10 can also be provided with a flow limiting unit 13 .
  • the flow limiting unit 13 may be disposed at an end of the first air passage 10 close to the intake end A. As shown in FIG.
  • the positional relationship between the flow limiting unit 13 and the air pump 11 is not limited in this embodiment of the present application. It can be understood that the flow limiting unit 13 can be arranged between the air pump 11 and the electromagnetic three-way valve 12 . Or the air pump 11 is arranged between the flow limiting unit 13 and the electromagnetic three-way valve 12 .
  • the flow limiting speed of the flow limiting unit 13 is between 40mL/min-60mL/min.
  • the flow limiting speed of the flow limiting unit 13 is 50 mL/min.
  • the flow limiting unit 13 may be a flow limiting valve or a capillary.
  • the intake end A of the first airway 10 and one end of the second airway 20 are integrated into an exhalation collection unit.
  • the exhalation collection unit may be an exhalation mask or a nasal catheter.
  • the end-tidal gas collection device 100 with separated airways further includes a gas collection unit, which is arranged at the outlet end B of the first airway 10 .
  • the electromagnetic three-way valve 12 includes a first port a, a second port b, and a third port c, and the first airway 10 communicates with the electromagnetic three-way valve through the first port a and the second port b.
  • the through valve 12 is connected, and one end of the third air channel 30 is connected with the electromagnetic three-way valve 12 through the third port c.
  • the electromagnetic three-way valve 12 when the electromagnetic three-way valve 12 is energized, the first port a and the second port b of the electromagnetic three-way valve 12 are connected. When the electromagnetic three-way valve 12 is powered off, the first port a and the third port c of the electromagnetic three-way valve 12 are connected.
  • FIG. 2 is a schematic flowchart of a method for collecting end-tidal gas with separated airways provided in an embodiment of the present application.
  • the specific flow of the end-tidal gas collection method for separating the airway can be as follows:
  • the control unit 40 determines the power-on timing of the electromagnetic three-way valve 12 based on the volume of the first airway 10 and the flow rate of exhalation.
  • the control unit 40 determines the electromagnetic three-way flow rate according to the volume of the part from the intake end A of the first airway 10 to the electromagnetic three-way valve 12 and the flow rate of exhalation. Timing of energization of valve 12.
  • the flow rate of the exhaled breath can be regulated by the air pump 11 .
  • the power-on timing is the specific power-on time, for example, the 10th second, the 15th second, the 20th second, etc. after the expiration state monitoring unit 21 detects the start of the end-expiration.
  • the power-on timing can be specifically determined by the volume of the part from the intake end A of the first airway 10 to the electromagnetic three-way valve 12 and the flow rate of exhalation. That is, the volume of the part from the intake end A of the first airway 10 to the electromagnetic three-way valve 12 and the flow rate of exhalation can determine the duration of the end-tidal gas from the intake end A to the electromagnetic three-way valve, and the duration is power on timing.
  • the electromagnetic three-way valve 12 when the end of exhalation has not started, the electromagnetic three-way valve 12 is in a power-off state, and the first port a and the third port c of the electromagnetic three-way valve 12 are connected. At this time, exhaled air can be exhausted to the outside through the third airway 30 .
  • control unit 40 controls the electromagnetic three-way valve 12 to be powered on, so as to conduct the first port a and the second port b of the electromagnetic three-way valve 12 .
  • the gas collection unit collects the end-tidal gas through the outlet end B of the first airway 10 .
  • the method for collecting end-tidal gas with separated airways is applied to the end-tidal gas collection device 100 for separated airways provided in the embodiment of the present application.
  • the control unit 40 can control the electromagnetic three-way valve 12 to be powered off, so as to connect the first port a and the first port a of the electromagnetic three-way valve.
  • the third port c At this time, exhaled air can be exhausted to the outside through the third airway 30 .
  • the control unit 40 can return to the step of determining the power-on timing of the electromagnetic three-way valve 12 based on the volume of the first airway 10 and the flow rate of exhalation, so as to control the exhalation.
  • the end gas is collected again.
  • the control unit 40 can control the air pump 11 and current limiting unit 13 are closed.
  • whether the end-tidal gas collection process of separating the airway ends depends on whether an ideal volume of end-tidal gas is collected in the gas collection unit.
  • the end-tidal gas collection device 100 with separated airways includes the first airway 10 , the second airway 20 , the third airway 30 and the control unit 40 .
  • the first air passage 10 includes an air inlet A and an air outlet B
  • the first air passage 10 is provided with an air pump 11 and an electromagnetic three-way valve 12, and the air pump 11 is arranged at one end of the first air passage 10 close to the air inlet A
  • the electromagnetic three-way valve is arranged at one end of the first airway 10 close to the air outlet B
  • the second airway 20 is provided with an exhalation state monitoring unit 21
  • one end of the third airway 30 is connected with the electromagnetic three-way valve 12, and the other One end communicates with the air
  • the control unit 40 is electrically connected with the air pump 11 , the electromagnetic three-way valve 12 and the exhalation state monitoring unit 21 .
  • This scheme can control the electromagnetic three-way valve 12 to be energized through the control unit 40 when the expiration state monitoring unit 21 detects the beginning of the end of expiration, so as to achieve the purpose of collecting the end-tidal gas of the separated airway and reduce the end-tidal gas collection difficulty.

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Abstract

一种分离气道的呼气末气体采集装置（100）。其中，该分离气道的呼气末气体采集装置（100）包括第一气道（10）、第二气道（20）、第三气道（30）和控制单元（40）。其中，第一气道（10）包括进气端（A）和出气端（B），第一气道（10）上设置有气泵（11）和电磁三通阀（12），气泵（11）设置于第一气道（10）靠近进气端（A）的一端，电磁三通阀（12）设置于第一气道（10）靠近出气端（B）的一端；第二气道（20）上设置有呼气状态监测单元（21）；第三气道（30）的一端与电磁三通阀（12）连接，另一端与空气连通；控制单元（40）与气泵（11）、电磁三通阀（12）、呼气状态监测单元（21）电连接。该呼气末气体采集装置（100）在呼气状态监测单元（21）监测到呼气末开始时，通过控制单元（40）控制电磁三通阀（12）通电，从而达到分离气道的呼气末气体采集的目的，降低了呼气末气体的采集难度。

Description

分离气道的呼气末气体采集装置 技术领域
本申请涉及呼气采集技术领域，具体涉及一种分离气道的呼气末气体采集装置。
背景技术
呼气诊断疾病技术正崛起为与血检、影像检测并列互补的新兴体外诊断技术，鉴于其检测方式具有无创、快速、便捷等特点，呼气诊断疾病技术受到国内外研究学者和临床医生的高度重视，相关市场蓝海可达千亿级别。因此，国内外机构纷纷争相开发呼气检测仪器，当前现有临床上广泛使用的呼气检测仪器包括，检测红细胞寿命的红细胞寿命测定呼气试验仪、检测幽门螺杆菌的幽门螺杆菌(Hp)测试仪，检测呼气道炎症的呼出气一氧化氮(FENO)测试仪等等。这些呼气检测仪器的使用均离不开呼气的采集。在人体呼气分析中，比较有意义的是采集呼气末端的气体。呼气前端的气体也被称为腔道气，因与大气环境直接相连接，一般混入较多的空气，测量受到环境的影响较大；而呼气末端的气体基本上是肺泡气，是人体经过血液循环后经过肺泡气体交换直接排出体外并能携带有大量健康状态信息的气体，最能反映人体身体当前的健康状况。
技术问题
准确采集呼气末端的气体并不容易，对于有认知能力和能够主动配合呼气的成人，可通过人为控制和判断，在呼气过程中采用电磁阀或者机械结构设计来收集呼气末端的气体。然而，目前的呼气检测仪器对呼吸稳定性要求较高，前述呼气末端气体采集方式不适用于一些特定人群，比如认知能力较低的婴幼儿和无主动意识或者有认知障碍的成人。
技术解决方案
为了解决上述技术问题，本发明的目的是提供一种分离气道的呼气末气体采集装置，可以降低呼气末气体的采集难度。
本发明所采用的技术方案是：一种分离气道的呼气末气体采集装置，包括：
第一气道，所述第一气道包括进气端和出气端，所述第一气道上设置有气泵和电磁三通阀，所述气泵和所述限流单元设置于所述第一气道靠近所述进气端的一端，所述电磁三通阀设置于所述第一气道靠近所述出气端的一端；
第二气道，所述第二气道上设置有呼气状态监测单元；
第三气道，所述第三气道的一端与所述电磁三通阀连接，另一端与空气连通；
控制单元，所述控制单元与所述气泵、所述电磁三通阀、所述呼气状态监测单元电连接。
进一步的，所述呼气状态监测单元包括流量传感器件或压力传感器件。
进一步的，所述第一气道上还设置有限流单元，所述限流单元设置于所述第一气道靠近所述进气端的一端。
进一步的，所述限流单元的限流速度在40mL/min-60mL/min之间。
进一步的，所述限流单元为限流阀或毛细管。
进一步的，所述第一气道的进气端和所述第二气道的一端集成于一呼气采集单元中。
进一步的，所述分离气道的呼气末气体采集装置还包括气体收集单元，所述气体收集单元设置于所述第一气道的出气端。
进一步的，所述电磁三通阀包括第一通口、第二通口和第三通口，所述第一气道通过所述第一通口和所述第二通口与所述电磁三通阀连接，所述第三气道的一端通过所述第三通口与所述电磁三通阀连接。
有益效果
本申请实施例提供的分离气道的呼气末气体采集装置包括第一气道、第二气道、第三气道和控制单元。其中，所述第一气道包括进气端和出气端，所述第一气道上设置有气泵和电磁三通阀，所述气泵设置于所述第一气道靠近所述进气端的一端，所述电磁三通阀设置于所述第一气道靠近所述出气端的一端；所述第二气道上设置有呼气状态监测单元；所述第三气道的一端与所述电磁三通阀连接，另一端与空气连通；所述控制单元与所述气泵、所述电磁三通阀、所述呼气状态监测单元电连接。本方案可以在呼气状态监测单元监测到呼气末开始时，通过控制单元控制电磁三通阀通电，从而达到分离气道的呼气末气体采集的目的，降低了呼气末气体的采集难度。
附图说明
图1是本申请实施例提供的分离气道的呼气末气体采集装置的结构示意图。
图2是本申请实施例提供的分离气道的呼气末气体采集方法的流程示意图。
本发明的实施方式
下面结合附图和具体实施例对本发明做进一步的详细说明。对于以下实施例中的步骤编号，其仅为了便于阐述说明而设置，对步骤之间的顺序不做任何限定，实施例中的各步骤的执行顺序均可根据本领域技术人员的理解来进行适应性调整。
本申请实施例提供了一种分离气道的呼气末气体采集装置，以下将分别进行详细说明。
请参阅图1，图1是本申请实施例提供的分离气道的呼气末气体采集装置的结构示意图。 该分离气道的呼气末气体采集装置100可以包括第一气道10、第二气道20、第三气道30和控制单元40。
其中，第一气道10包括进气端A和出气端B，第一气道10上设置有气泵11和电磁三通阀12，气泵11设置于第一气道10靠近进气端A的一端，电磁三通阀设置于第一气道10靠近出气端B的一端；第二气道20上设置有呼气状态监测单元21；第三气道30的一端与电磁三通阀12连接，另一端与空气连通；控制单元40与气泵11、限流单元13、电磁三通阀12、呼气状态监测单元21电连接。
在一些实施例中，呼气状态监测单元21可以包括流量传感器件或压力传感器件。
可以理解的是，流量传感器件或压力传感器件均为敏感型传感器件，流量传感器件或压力传感器可以根据第二气道20中气体流量的变化或气压的变化，确定当前的呼气状态。
在一些实施例中，该第一气道10还可以设置有限流单元13。该限流单元13具体可以设置于第一气道10靠近进气端A的一端。
需要说明的是，限流单元13和气泵11的位置关系在本申请实施例中不作限定。可以理解的是，限流单元13可以设置于气泵11和电磁三通阀12之间。或气泵11设置于限流单元13和电磁三通阀12之间。
在本申请实施例中，限流单元13的限流速度在40mL/min-60mL/min之间。优选的，该限流单元13的限流速度为50mL/min。其中，限流单元13可以为限流阀或毛细管。
需要说明的是，第一气道10的进气端A和第二气道20的一端集成于一呼气采集单元中。该呼气采集单元可以为呼气面罩或鼻导管等。
在一些实施例中，分离气道的呼气末气体采集装置100还包括气体收集单元，气体收集单元设置于第一气道10的出气端B。
在一些实施例中，电磁三通阀12包括第一通口a、第二通口b和第三通口c，第一气道10通过第一通口a和第二通口b与电磁三通阀12连接，第三气道30的一端通过第三通口c与电磁三通阀12连接。
需要说明的是，当电磁三通阀12通电时，该电磁三通阀12的第一通口a和第二通口b导通。当电磁三通阀12断电时，该电磁三通阀12的第一通口a和第三通口c导通。
请参阅图2，图2是本申请实施例提供的分离气道的呼气末气体采集方法的流程示意图。该分离气道的呼气末气体采集方法的具体流程可以如下：
101、当呼气状态监测单元21监测到呼气末开始时，控制单元40基于第一气道10的容积和呼气的流速确定电磁三通阀12的通电时机。
具体的，当呼气状态监测单元21监测到呼气末开始时，控制单元40根据第一气道10的进气端A至电磁三通阀12部分的容积和呼气的流速确定电磁三通阀12的通电时机。
需要说明的是，该呼气的流速可以通过气泵11进行调控。该通电时机即为具体的通电时间，比如，当呼气状态监测单元21监测到呼气末开始后的第10秒、第15秒、第20秒等等。
可以理解的是，该通电时机具体可以由第一气道10的进气端A至电磁三通阀12部分的容积和呼气的流速确定。即，通过第一气道10的进气端A至电磁三通阀12部分的容积和呼气的流速可以确定呼气末气体从进气端A到电磁三通阀的时长，该时长即为通电时机。
需要说明的是，当呼气末未开始时，电磁三通阀12处于断电状态，该电磁三通阀12的第一通口a和第三通口c导通。此时，呼气可以通过第三气道30排到外界。
102、当到达通电时机时，控制单元40控制电磁三通阀12通电，以导通电磁三通阀12的第一通口a和第二通口b。
103、气体收集单元通过第一气道10的出气端B对呼气末气体进行收集。
需要说明的是，该分离气道的呼气末气体采集方法应用于本申请实施例提供的分离气道的呼气末气体采集装置100中。
可以理解的是，由于呼气末气体较少，因此一般都需要通过多次收集才能收集到理想体积的呼气末气体。
因此，在一些实施例中，当呼气状态监测单元21监测到呼气末结束时，控制单元40可以控制电磁三通阀12断电，以导通电磁三通阀的第一通口a和第三通口c。此时，呼气可以通过第三气道30排到外界。
当呼气状态监测单元21监测到呼气末开始时，则可以返回执行控制单元40基于第一气道10的容积和呼气的流速确定电磁三通阀12的通电时机的步骤，以对呼气末气体进行再次收集。
需要说明的是，在分离气道的呼气末气体采集过程中，气泵11和限流单元13一直处于开启状态，直至分离气道的呼气末气体采集过程结束时，控制单元40可以控制气泵11和限流单元13关闭。其中，分离气道的呼气末气体采集过程是否结束取决于气体收集单元中是否收集到理想体积的呼气末气体。
综上，本申请实施例提供的分离气道的呼气末气体采集装置100包括第一气道10、第二气道20、第三气道30和控制单元40。其中，第一气道10包括进气端A和出气端B，第一气道10上设置有气泵11和电磁三通阀12，气泵11设置于第一气道10靠近进气端A的一端，电磁三通阀设置于第一气道10靠近出气端B的一端；第二气道20上设置有呼气状态监测单 元21；第三气道30的一端与电磁三通阀12连接，另一端与空气连通；控制单元40与气泵11、电磁三通阀12、呼气状态监测单元21电连接。本方案可以在呼气状态监测单元21监测到呼气末开始时，通过控制单元40控制电磁三通阀12通电，从而达到分离气道的呼气末气体采集的目的，降低了呼气末气体的采集难度。
以上对本申请实施例所提供的一种分离气道的呼气末气体采集装置进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的方法及其核心思想；同时，对于本领域的技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。

Claims (8)

  1. 一种分离气道的呼气末气体采集装置，其特征在于，包括：
    第一气道，所述第一气道包括进气端和出气端，所述第一气道上设置有气泵和电磁三通阀，所述气泵设置于所述第一气道靠近所述进气端的一端，所述电磁三通阀设置于所述第一气道靠近所述出气端的一端；
    第二气道，所述第二气道上设置有呼气状态监测单元；
    第三气道，所述第三气道的一端与所述电磁三通阀连接，另一端与空气连通；
    控制单元，所述控制单元与所述气泵、所述电磁三通阀、所述呼气状态监测单元电连接。
  2. 如权利要求1所述的分离气道的呼气末气体采集装置，其特征在于，所述呼气状态监测单元包括流量传感器件或压力传感器件。
  3. 如权利要求1所述的分离气道的呼气末气体采集装置，其特征在于，所述第一气道上还设置有限流单元，所述限流单元设置于所述第一气道靠近所述进气端的一端。
  4. 如权利要求3所述的分离气道的呼气末气体采集装置，其特征在于，所述限流单元的限流速度在40mL/min-60mL/min之间。
  5. 如权利要求3所述的分离气道的呼气末气体采集装置，其特征在于，所述限流单元为限流阀或毛细管。
  6. 如权利要求1所述的分离气道的呼气末气体采集装置，其特征在于，所述第一气道的进气端和所述第二气道的一端集成于一呼气采集单元中。
  7. 如权利要求1所述的分离气道的呼气末气体采集装置，其特征在于，所述分离气道的呼气末气体采集装置还包括气体收集单元，所述气体收集单元设置于所述第一气道的出气端。
  8. 如权利要求1所述的分离气道的呼气末气体采集装置，其特征在于，所述电磁三通阀包括第一通口、第二通口和第三通口，所述第一气道通过所述第一通口和所述第二通口与所述电磁三通阀连接，所 述第三气道的一端通过所述第三通口与所述电磁三通阀连接。
PCT/CN2022/121336 2021-09-27 2022-09-26 分离气道的呼气末气体采集装置 WO2023046165A1 (zh)

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