WO2014101550A1 - 麻醉机用气道压力传感器开机自检方法 - Google Patents

麻醉机用气道压力传感器开机自检方法 Download PDF

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Publication number
WO2014101550A1
WO2014101550A1 PCT/CN2013/085725 CN2013085725W WO2014101550A1 WO 2014101550 A1 WO2014101550 A1 WO 2014101550A1 CN 2013085725 W CN2013085725 W CN 2013085725W WO 2014101550 A1 WO2014101550 A1 WO 2014101550A1
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Prior art keywords
pressure sensor
airway
pressure
anesthesia machine
pressure value
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PCT/CN2013/085725
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English (en)
French (fr)
Inventor
张耀东
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北京谊安医疗系统股份有限公司
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Application filed by 北京谊安医疗系统股份有限公司 filed Critical 北京谊安医疗系统股份有限公司
Priority to US14/396,312 priority Critical patent/US20150083130A1/en
Priority to BR112014026912A priority patent/BR112014026912A2/pt
Priority to EA201491760A priority patent/EA028280B1/ru
Publication of WO2014101550A1 publication Critical patent/WO2014101550A1/zh
Priority to IN2096MUN2014 priority patent/IN2014MN02096A/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/104—Preparation of respiratory gases or vapours specially adapted for anaesthetics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0051—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes with alarm devices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0057—Pumps therefor
    • A61M16/0075—Bellows-type
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/01—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes specially adapted for anaesthetising
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/021—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes operated by electrical means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/20—Valves specially adapted to medical respiratory devices
    • A61M16/201—Controlled valves
    • A61M16/202—Controlled valves electrically actuated
    • A61M16/203—Proportional
    • A61M16/204—Proportional used for inhalation control
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/20—Valves specially adapted to medical respiratory devices
    • A61M16/201—Controlled valves
    • A61M16/202—Controlled valves electrically actuated
    • A61M16/203—Proportional
    • A61M16/205—Proportional used for exhalation control
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/0027—Accessories therefor, e.g. sensors, vibrators, negative pressure pressure meter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2202/00—Special media to be introduced, removed or treated
    • A61M2202/02—Gases
    • A61M2202/0241—Anaesthetics; Analgesics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3331—Pressure; Flow
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/70—General characteristics of the apparatus with testing or calibration facilities
    • A61M2205/702—General characteristics of the apparatus with testing or calibration facilities automatically during use
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2209/00—Ancillary equipment
    • A61M2209/02—Equipment for testing the apparatus

Definitions

  • the invention relates to the technical field of anesthesia machine, in particular to a method for self-test of airway pressure sensor for anesthesia machine. Background technique
  • An anesthesia machine is a high-grade medical device that can transport a variety of gases and volatile anesthetics, control and assist the patient's breathing, and adjust the patient's awareness and pain level during the operation.
  • the anesthesia machine is a medical device for maintaining and supporting life.
  • the self-test of the anesthesia machine is a necessary step to ensure the normal operation of the anesthesia machine.
  • the anesthesia machine has multiple items for self-test, including the detection of airway pressure sensors.
  • the airway pressure sensor on the anesthesia machine is self-tested, and most of them are judged by the zero point of the pressure sensor. If the voltage value of the zero point is within the allowable range, the pressure sensor can be judged to work normally. Otherwise, the pressure sensor is considered to be invalid.
  • This traditional airway pressure sensor self-test method although simple and convenient, has some omissions, for example:
  • the zero point voltage of the airway pressure sensor is not within the allowable range, it is not necessarily a problem of the pressure sensor itself, it is possible
  • the self-test fails, because in the closed anesthesia system, at the end of the last use, there will be some residual gas in the anesthesia machine. If it is a closed system, this part of the gas will It takes a long time to complete the leak. Before the leak is complete, there will be some pressure in the airway. Therefore, it is inaccurate to judge whether the pressure sensor is invalid only by the zero point of the pressure sensor.
  • An object of the present invention is to provide a method for performing self-test of an airway pressure sensor for an anesthesia machine, which can detect the pressure value of the sensor by combining the manual state and the machine state of the anesthesia machine, so that the detection accuracy can be higher. Better stability.
  • An object of the present invention is to provide a method for performing self-test of an airway pressure sensor for an anesthesia machine, which can directly switch the manual state of the anesthesia machine to a machine-controlled state, and detect the sensor pressure value in the machine-controlled state. Improve the detection speed while ensuring the accuracy and stability of the test.
  • a method for self-testing an airway pressure sensor for an anesthesia machine comprising the following steps:
  • Step a the anesthesia machine is started, the anesthesia machine is in a manual state, in the manual state, the bellows of the anesthesia machine is separated from the airway, and the pressure value of the pressure sensor set on the airway is sampled, and the pressure value of the pressure sensor is VI;
  • Step b determining whether the pressure value VI is within the airway pressure range, if yes, proceeding to step c, if not Go to step g;
  • Step C determining whether the pressure value VI is within the sensor zero voltage range, if yes, proceed to step f, if not, proceed to step d;
  • Step d the manual state of the anesthesia machine is switched to the machine control state, and the bellows of the anesthesia machine is in communication with the airway when the state is controlled, and the pressure value of the pressure sensor of the current state is sampled immediately after the state is switched, and the pressure value is V2. After the time t1 second, the pressure value of the pressure sensor is sampled again, and the pressure value is V3;
  • Step e Determine whether the pressure value V3 is less than the pressure value V2, if yes, proceed to step f, if not, proceed to step g; step f, the pressure sensor is valid, and the detection ends;
  • Step g the pressure sensor fails, and enters the inspection state.
  • the airway pressure range is -2 KPa to 13 KPa.
  • the senor has a zero voltage range of -0.5 KPa to 0.5 KPa.
  • the time t1 is 2 to 6 seconds.
  • Step A the anesthesia machine is started, the manual state of the anesthesia machine is switched to the machine control state, and the bellows of the anesthesia machine in the machine control state is in communication with the airway, and the pressure value of the pressure sensor in the current state is sampled immediately after the state is switched, and the pressure is now The value is V4, after the elapse of time t2 seconds, the pressure value of the pressure sensor is again sampled, and the pressure value is V5;
  • Step C determining whether the pressure value V5 is within the sensor zero voltage range, if yes, proceed to step E, if not, proceed to step D;
  • Step D Determine whether the pressure value V5 is less than the pressure value V4, if yes, proceed to step E, if not, proceed to step F; Step E, the pressure sensor is valid, and the detection ends;
  • Step F The pressure sensor fails and enters the inspection state.
  • step B is further set between step A and step C to determine whether the pressure value V5 is within the airway pressure range, and if yes, proceed to step C. If not, proceed to step F.
  • the airway pressure range is -2 KPa to 13 KPa.
  • the senor has a zero voltage range of -0.5 KPa to 0.5 KPa.
  • the time t2 is 5 to 10 seconds.
  • the anesthesia machine By detecting the pressure value of the pressure sensor in the manual state, if the detected value is within the airway pressure range and not within the sensor zero voltage range, then the anesthesia machine is switched to the machine state to the pressure sensor. The pressure value is detected, so that the airway communicates with the bellows under the machine control state, so that the gas that may be left in the airway flows into the windbox, thereby changing the pressure value in the airway, so if the pressure value of the pressure sensor at this time If there is a reduced condition or falls directly into the sensor zero voltage range, then the pressure sensor is effective.
  • This detection method makes the detection process more accurate and stable, and can ensure the safety and reliability of the pressure sensor;
  • the airway under the machine control state communicates with the windbox, so that the gas that may be left in the airway flows into the windbox, thereby changing the pressure value in the airway. If the pressure value of the pressure sensor is less than the pressure value of the pressure sensor collected after a certain time, or the pressure value of the pressure sensor directly falls within the zero voltage range of the sensor after a certain time, then the pressure sensor is valid, such detection mode Not only the detection process is accurate and stable, but also ensures the safety and reliability of the pressure sensor. It also simplifies the detection process, improves the detection speed and reduces the detection difficulty.
  • the method of the invention can be applied to the field of valves as well as the effect of detecting the pressure sensor described above, that is, ensuring the accuracy and stability of the detection, and improving the safety and reliability of the valve.
  • FIG. 1 is a process flow diagram of a method for performing a self-test of an airway pressure sensor for an anesthesia machine according to the first embodiment
  • FIG. 2 is a process flow diagram of a method for performing a self-test of an airway pressure sensor for an anesthesia machine according to the second embodiment.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the airway pressure sensor self-test method for an anesthesia machine described in this embodiment includes the following steps:
  • Step 1 Start the anesthesia machine. At this time, the anesthesia machine is powered on by default, and the air box and airway in the anesthesia machine in the manual state are separated.
  • Step 2 Record the pressure value of the pressure sensor set on the airway at this time, and the pressure value of the pressure sensor is VI;
  • Step 3 Determine whether the pressure value VI of the pressure sensor is within the range of the airway pressure range, in this embodiment The road pressure range is -2KPa ⁇ 13KPa. If the pressure value VI of the pressure sensor is within the airway pressure range, then go to the fourth step. If the pressure value VI of the pressure sensor is outside the airway pressure range, then the pressure sensor Has expired and needs to be repaired;
  • Step 4 Determine whether the pressure value VI of the pressure sensor is within the sensor zero voltage range.
  • the sensor zero voltage range is within the allowable range of zero voltage, and is -0.5 KPa to 0.5 KPa, if the pressure value of the pressure sensor VI is within the sensor zero voltage range, then the pressure sensor is valid, the detection is over. If the pressure sensor VI of the pressure sensor is outside the sensor zero voltage range, go to the fifth step for further testing.
  • Step 5 Anaesthesia The machine is switched from the manual state to the machine control state. In the machine control state, the bellows of the anesthesia machine is in communication with the airway.
  • the machine control state of the anesthesia machine defaults to the inhalation valve being closed, the exhalation valve is open, and the current state is sampled immediately after switching the state.
  • the pressure value of the pressure sensor in the state the pressure value is V2 at this time, after the time t1 second, the pressure value of the pressure sensor is sampled again, and the pressure value is V3, which is 3 seconds in this embodiment;
  • Step 6 Determine whether the pressure value V3 of the pressure sensor is within the sensor zero voltage range. If the pressure value V3 of the pressure sensor is within the sensor zero voltage range, it means the pressure sensor is valid, the detection work is finished, if the pressure of the pressure sensor If the value V3 is not within the sensor zero voltage range, proceed to step 7 for further testing;
  • Step 7 Determine whether the pressure value V3 of the pressure sensor is smaller than the pressure value V2 of the pressure sensor. If the pressure value V3 of the pressure sensor is less than the pressure value V2 of the pressure sensor, it means that the pressure sensor is valid, the detection operation ends, if the pressure sensor If the pressure value V3 is not less than the pressure value V2 of the pressure sensor, it means that the pressure sensor has failed and needs to be repaired.
  • the anesthesia machine is the default manual state at the time of starting up, because in the manual state, the bellows of the anesthesia machine is separated from the airway, and the bellows has a volume of more than 1500 ml, the bellows and the atmosphere
  • the pressure is connected again.
  • the power is switched to the machine control state, and the air passage will communicate with the bellows. If there is residual gas in the air passage, there will be a certain pressure in the air passage, and the gas will flow in the direction of the bellows. The pressure must change to some extent.
  • the airway pressure sensor detects that the pressure change indicates that the pressure sensor is valid, or the pressure value of the pressure sensor under the machine control state is within the sensor zero voltage range, then the pressure sensor is also valid. Otherwise, it is invalid and needs to be repaired. Therefore, if the pressure value of the pressure sensor is detected in the manual state is not within the sensor zero voltage range, but within the airway pressure range, the sensor may not be invalid at this time. There is still residual gas in the airway, because it is dense. In the anesthesia system, at the end of the last use, there will be a part of the residual gas in the anesthesia machine. This part of the residual gas will take a long time to complete the leak. Before the leak is completed, there will be some pressure in the airway, thus affecting Detection.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the airway pressure sensor self-test method for an anesthesia machine described in this embodiment includes the following steps.
  • a method for self-testing an airway pressure sensor for an anesthesia machine comprising the following steps:
  • Step 1 Start the anesthesia machine. At this time, the anesthesia machine is powered on by default, and the air box and airway in the anesthesia machine in the manual state are separated.
  • Step 2 Switch the anesthesia machine from the manual state to the machine control state.
  • the bellows of the anesthesia machine is in communication with the airway.
  • the machine control state of the anesthesia machine defaults to the inhalation valve being closed and the exhalation valve being opened.
  • the pressure value of the pressure sensor in the current state is sampled.
  • the pressure value of the pressure sensor is V4.
  • the pressure value of the pressure sensor is again sampled, and the pressure value of the pressure sensor is V5.
  • the time t2 is 6 seconds; the third step: determining whether the pressure value V5 of the pressure sensor is within the airway pressure range, in this embodiment, the airway pressure range is -2 KPa to 13 KPa, if the pressure value of the pressure sensor If V5 is within the airway pressure range, it will go to the fourth step for further testing. If the pressure value V5 of the pressure sensor is not within the airway pressure range, it means that the pressure sensor has failed and needs to be repaired;
  • the fourth step determining whether the pressure value V5 of the pressure sensor is within the zero voltage range of the sensor.
  • the zero voltage range of the sensor is within a range allowed by the zero point voltage, and is -0.5 KPa to 0.5 KPa, if the pressure of the pressure sensor The value V5 is within the sensor zero voltage range, indicating that the pressure sensor is valid and the detection operation is over.
  • Step 5 Determine the pressure Whether the pressure value V5 of the sensor is less than the pressure value V4 of the pressure sensor, if the pressure value V5 of the pressure sensor is less than the pressure value V4 of the pressure sensor, it means that the pressure sensor is valid, the detection operation is finished, if the pressure value V5 of the pressure sensor is not less than the pressure sensor
  • the pressure value V4 indicates that the pressure sensor has failed and needs to be repaired.
  • the detection principle of this embodiment is consistent with the principle of the first embodiment, except that the manual state detection process is omitted, and the anesthesia machine is directly switched to the machine control state for detection, which can not only achieve the detection of the first embodiment.
  • the effect can also save the detection process, reduce the difficulty of detection, and improve the detection speed.

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Abstract

一种麻醉机用气道压力传感器开机自检方法，在手动状态时对压力传感器的压力值进行检测，检测后的值如果在气道压力量程范围内而不在传感器零点电压范围内时，再将麻醉机切换到机控状态对压力传感器的压力值进行检测，这样通过在机控状态下，气道与风箱连通，使可能遗留在气道内的气体向风箱内流动，进而改变气道内的压力值，因此如果此时的压力传感器的压力值有降低的或者直接落入传感器零点电压范围内，则压力传感器是有效的。该自检方法使检测过程更加准确和稳定，并能保证压力传感器的安全性和可靠性。

Description

麻醉机用气道压力传感器开机自检方法
技术领域
本发明涉及麻醉机技术领域， 尤其涉及一种麻醉机用气道压力传感器开机自检方法。 背景技术
麻醉机是一种可以对多种气体和挥发性麻醉药进行输送， 控制和辅助病人呼吸， 同时 在手术过程中对病人意识、 痛觉水平进行调节的高级医疗设备。
麻醉机作为维持和支持生命的医用设备， 其开机自检是保证麻醉机正常工作的必要步 骤， 麻醉机开机自检具有多个项目， 包括有气道压力传感器的检测等。 目前， 麻醉机上的 气道压力传感器开机自检， 大多是对压力传感器的零点的判断， 如果零点的电压值在所允 许的范围里， 则可判定压力传感器正常工作， 否则， 认为压力传感器失效。 这种传统的气 道压力传感器自检方法， 虽然简单方便， 但存在一定的疏漏， 例如： 当气道压力传感器的 零点电压不在所允许的范围内， 不一定是压力传感器本身的问题， 有可能是气道里本身就 存在一定的压力， 这样肯定自检失败， 因为在密闭式麻醉系统中， 在上一次使用结束时， 麻醉机内会有一部分残气， 如果是密闭式系统， 这部分气体会需要很长的时间才能泄漏完 成， 在泄漏完全之前， 气道内会有一定的压力， 所以仅通过压力传感器的零点来判断压力 传感器是否失效是不准确的。 发明内容
本发明的一个目的， 在于提供一种麻醉机用气道压力传感器开机自检方法， 其通过在 麻醉机手动状态和机控状态相结合下检测传感器压力值， 可以使检测的精确度更高、 稳定 性更好。
本发明的一个目的， 在于提供一种麻醉机用气道压力传感器开机自检方法， 其通过直 接将麻醉机的手动状态切换到机控状态， 并检测在机控状态下的传感器压力值， 可以在保 证检测的精度和稳定性的情况下， 提升检测速度。
为达此目的， 本发明采用以下技术方案：
一种麻醉机用气道压力传感器开机自检方法， 包括以下步骤：
步骤 a、麻醉机启动， 麻醉机处于手动状态， 手动状态时麻醉机的风箱与气道呈分开状 态， 采样气道上设置的压力传感器的压力值， 此时压力传感器的压力值为 VI；
步骤 b、 判断压力值 VI是否在气道压力量程范围内， 此若是则进入步骤 c， 若不是则 进入步骤 g;
步骤 C、 判定压力值 VI是否在传感器零点电压范围内， 若是则进入步骤 f,若不是则进 入步骤 d;
步骤 d、 麻醉机手动状态切换到机控状态， 机控状态时麻醉机的风箱与气道呈连通状 态， 切换状态后立即采样当前状态的压力传感器的压力值， 此时压力值为 V2， 经过时间 tl 秒后， 再次采样压力传感器的压力值， 此时压力值为 V3;
步骤 e、 判断压力值 V3是否小于压力值 V2， 若是则进入步骤 f,若不是则进入步骤 g; 步骤 f、 压力传感器有效， 检测结束；
步骤 g、 压力传感器失效， 进入检修状态。
作为麻醉机用气道压力传感器开机自检方法的一种优选方案， 所述气道压力量程范围 为 -2KPa〜13KPa。
作为麻醉机用气道压力传感器开机自检方法的一种优选方案， 所述传感器零点电压范 围为 -0.5KPa〜0.5KPa。
作为麻醉机用气道压力传感器开机自检方法的一种优选方案， 所述时间 tl为 2〜6秒。 一种麻醉机用气道压力传感器开机自检方法， 包括以下步骤：
步骤 A、 麻醉机启动， 麻醉机手动状态切换到机控状态， 机控状态时的麻醉机的风箱 与气道呈连通状态， 切换状态后立即采样当前状态的压力传感器的压力值， 此时压力值为 V4, 经过时间 t2秒后， 再次采样压力传感器的压力值， 此时压力值为 V5;
步骤 C、 判断压力值 V5是否在传感器零点电压范围内， 若是则进入步骤 E， 若不是则 进入步骤 D;
步骤 D、判断压力值 V5是否小于压力值 V4， 若是则进入步骤 E,若不是则进入步骤 F; 步骤 E、 压力传感器有效， 检测结束；
步骤 F、 压力传感器失效， 进入检修状态。
作为麻醉机用气道压力传感器开机自检方法的一种优选方案， 所述步骤 A和步骤 C之 间还设置步骤 B、判断压力值 V5是否在气道压力量程范围内， 若是则进入步骤 C， 若不是 则进入步骤 F。
作为麻醉机用气道压力传感器开机自检方法的一种优选方案， 所述气道压力量程范围 为 -2KPa〜13KPa。
作为麻醉机用气道压力传感器开机自检方法的一种优选方案， 所述传感器零点电压范 围为 -0.5KPa〜0.5KPa。
作为麻醉机用气道压力传感器开机自检方法的一种优选方案，所述时间 t2为 5〜10秒。 一种如上述所述的麻醉机用气道压力传感器开机自检方法在阀门中的应用。
对比现有技术， 本发明的有益效果为：
1、通过在手动状态时对压力传感器的压力值进行检测， 检测后的值如果在气道压力量 程范围内而不在传感器零点电压范围内时， 再将麻醉机切换到机控状态对压力传感器的压 力值进行检测， 这样通过在机控状态下， 气道与风箱连通， 使可能遗留在气道内的气体向 风箱内流动， 进而改变气道内的压力值， 因此如果此时的压力传感器的压力值有降低的情 况或者直接落入传感器零点电压范围内， 那么表示压力传感器有效， 这样的检测方式使检 测过程更加准确和稳定， 并能保证压力传感器的安全性和可靠性；
2、通过在麻醉机开机后直接由手动状态切换到机控状态， 机控状态下的气道与风箱连 通， 使可能遗留在气道内的气体向风箱内流动， 进而改变气道内的压力值， 如果一定时间 后采集压力传感器的压力值小于切换后立即采集压力传感器的压力值， 或者一定时间后采 集压力传感器的压力值直接落入传感器零点电压范围内， 那么表示压力传感器有效， 这样 的检测方式不仅检测过程准确和稳定， 能保证压力传感器的安全性和可靠性， 还使检测过 程更加简化， 提升了检测速度， 降低了检测难度；
3、 本发明的方法一样可以应用于阀门领域， 也能达到上述检测压力传感器的效果， 即 保证检测的精度和稳定性， 提高阀门的安全性和可靠性。 附图说明
图 1为实施例一所述的麻醉机用气道压力传感器开机自检方法的工艺流程图； 图 2为实施例二所述的麻醉机用气道压力传感器开机自检方法的工艺流程图。 具体实施方式
实施例一：
如图 1所示， 此实施例中所述的麻醉机用气道压力传感器开机自检方法， 包括以下步 骤：
第一步： 启动麻醉机， 此时麻醉机开机默认为手动状态， 手动状态时的麻醉机中的风 箱和气道是呈分离状态的；
第二步： 记录此时气道上设置的压力传感器的压力值， 压力传感器的压力值为 VI； 第三步： 判断压力传感器的压力值 VI 是否在气道压力量程范围内， 本实施例中气道 压力量程范围为 -2KPa〜13KPa， 如果压力传感器的压力值 VI在气道压力量程范围内， 那 么进入第四步， 如果压力传感器的压力值 VI 在气道压力量程范围以外， 那么压力传感器 已经失效， 需要进行检修；
第四步： 判断压力传感器的压力值 VI 是否在传感器零点电压范围内， 本实施例中传 感器零点电压范围为零点电压所允许的范围， 且为 -0.5KPa〜0.5KPa， 如果压力传感器的压 力值 VI 在传感器零点电压范围内， 那么压力传感器是有效的， 检测工作结束， 如果压力 传感器的压力值 VI在传感器零点电压范围以外， 那么进入第五步， 进行进一步的检测； 第五步： 将麻醉机由手动状态切换到机控状态， 机控状态时麻醉机的风箱与气道呈连 通状态， 麻醉机的机控状态默认的是吸气阀关闭， 呼气阀打开， 切换状态后立即采样当前 状态的压力传感器的压力值， 此时压力值为 V2， 经过时间 tl秒后， 再次采样压力传感器 的压力值， 此时压力值为 V3， 本实施例中 tl为 3秒；
第六步： 判断压力传感器的压力值 V3 是否在传感器零点电压范围内， 如果压力传感 器的压力值 V3 在传感器零点电压范围内， 则表示压力传感器是有效的， 检测工作结束， 如果压力传感器的压力值 V3 不在传感器零点电压范围内， 则进入第七步， 进行进一步的 检测；
第七步： 判断压力传感器的压力值 V3是否小于压力传感器的压力值 V2， 如果压力传 感器的压力值 V3小于压力传感器的压力值 V2， 则表示压力传感器是有效的， 检测工作结 束， 如果压力传感器的压力值 V3不小于压力传感器的压力值 V2， 则表示压力传感器已失 效， 需要检修。
上述检测方法采用的原理是： 首先麻醉机在开机时是默认的手动状态， 由于在手动状 态下时， 麻醉机的风箱与气道是分开的， 而风箱是具有 1500ml以上容积的， 风箱与大气压 力又是相通的， 这时开机切换到机控状态， 气道会和风箱连通， 如果气道内有残留气体， 那么气道内就会具有一定的压力， 气体就会向风箱的方向流动， 这时压力必然有一定的改 变， 如果气道压力传感器检测到这个压力的改变说明压力传感器是有效的， 或者机控状态 下的压力传感器的压力值在传感器零点电压范围内， 那么也说明压力传感器是有效的， 反 之则是无效的， 需要进行维修， 所以如果在手动状态检测到压力传感器的压力值不在传感 器零点电压范围内， 却在气道压力量程范围内时， 此时的传感器不一定失效， 可能是气道 中还留有残留的气体， 因为在密闭式麻醉系统中， 上一次使用结束时， 麻醉机内会有一部 分的残气， 这部分残气会需要很长一段时间才能泄漏完成， 在泄漏完成之前， 气道内会存 在一定的压力， 从而影响检测。
实施例二：
如图 2所示， 此实施例中所述的麻醉机用气道压力传感器开机自检方法， 包括以下步 一种麻醉机用气道压力传感器开机自检方法， 包括以下步骤：
第一步： 启动麻醉机， 此时麻醉机开机默认为手动状态， 手动状态时的麻醉机中的风 箱和气道呈分离状态；
第二步： 将麻醉机由手动状态切换到机控状态， 机控状态时麻醉机的风箱与气道呈连 通状态， 麻醉机的机控状态默认的是吸气阀关闭， 呼气阀打开， 切换状态后立即采样当前 状态的压力传感器的压力值， 此时压力传感器的压力值为 V4， 经过时间 t2秒后， 再次采 样压力传感器的压力值， 此时压力传感器的压力值为 V5， 本实施例中时间 t2为 6秒； 第三步： 判断压力传感器的压力值 V5 是否在气道压力量程范围内， 本实施例中， 气 道压力量程范围为 -2KPa〜13KPa， 如果压力传感器的压力值 V5在气道压力量程范围内， 则进入第四步进行进一步的检测， 如果压力传感器的压力值 V5 是不在气道压力量程范围 内， 则表示压力传感器已失效， 需要检修；
第四步： 判断压力传感器的压力值 V5 是否在传感器零点电压范围内， 本实施例中， 传感器零点电压范围为零点电压所允许的范围， 且为 -0.5KPa〜0.5KPa， 如果压力传感器的 压力值 V5 在传感器零点电压范围内， 则表示压力传感器有效， 检测工作结束， 如果压力 传感器的压力值 V5不在传感器零点电压范围内， 则进入第五步， 进行进一步的检测； 第五步： 判断压力传感器的压力值 V5是否小于压力传感器的压力值 V4， 如果压力传 感器的压力值 V5小于压力传感器的压力值 V4， 则表示压力传感器有效， 检测工作结束， 如果压力传感器的压力值 V5不小于压力传感器的压力值 V4， 则表示压力传感器已失效， 需要检修。
本实施例的检测原理与实施例一的原理一致， 只是本实施例省去了在手动状态检测的 工序， 直接将麻醉机切换到机控状态进行检测， 这样做不仅能达到实施例一的检测效果， 还能节省检测工序， 降低检测难度， 提高检测速度。
以上结合具体实施例描述了本发明的技术原理。这些描述只是为了解释本发明的原理， 而不能以任何方式解释为对本发明保护范围的限制。 基于此处的解释， 本领域的技术人员 不需要付出创造性的劳动即可联想到本发明的其它具体实施方式， 这些方式都将落入本发 明的保护范围之内。

Claims

权利要求书
1、 一种麻醉机用气道压力传感器开机自检方法， 包括以下步骤：
步骤 a、 麻醉机启动， 麻醉机处于手动状态， 手动状态时麻醉机的风箱与气道呈分 开状态， 采样气道上设置的压力传感器的压力值， 此时压力传感器的压力值为 VI； 步骤 b、 判断压力值 VI是否在气道压力量程范围内， 此若是则进入步骤 c， 若不 是则进入步骤 g;
步骤 c、 判定压力值 VI是否在传感器零点电压范围内， 若是则进入步骤 f,若不是 则进入步骤 d;
步骤 d、麻醉机手动状态切换到机控状态， 机控状态时麻醉机的风箱与气道呈连通 状态， 切换状态后立即采样当前状态的压力传感器的压力值， 此时压力值为 V2， 经过 时间 tl秒后， 再次采样压力传感器的压力值， 此时压力值为 V3 ;
步骤 e、判断压力值 V3是否小于压力值 V2， 若是则进入步骤 f,若不是则进入步骤 ;
步骤 f、 压力传感器有效， 检测结束；
步骤 g、 压力传感器失效， 进入检修状态。
2、 根据权利要求 1所述的麻醉机用气道压力传感器开机自检方法， 其特征在于， 所述气道压力量程范围为 -2KPa〜13KPa。
3、 根据权利要求 1所述的麻醉机用气道压力传感器开机自检方法， 其特征在于， 所述传感器零点电压范围为 -0.5KPa〜0.5KPa。
4、 根据权利要求 1所述的麻醉机用气道压力传感器开机自检方法， 其特征在于， 所述时间 tl为 2〜6秒。
5、 一种麻醉机用气道压力传感器开机自检方法， 包括以下步骤：
步骤 A、 麻醉机启动， 麻醉机手动状态切换到机控状态， 机控状态时的麻醉机的 风箱与气道呈连通状态， 切换状态后立即采样当前状态的压力传感器的压力值， 此时 压力值为 V4， 经过时间 t2秒后， 再次采样压力传感器的压力值， 此时压力值为 V5 ; 步骤 C、 判断压力值 V5是否在传感器零点电压范围内， 若是则进入步骤 E， 若不 是则进入步骤 D;
步骤 D、 判断压力值 V5是否小于压力值 V4， 若是则进入步骤 E,若不是则进入步 骤 F; 歩骤 F、 压力传感器失效， 进入检修状态。
6、 根据权利要求 5所述的麻醉机用气道压力传感器开机自检方法， 其特征在于， 所述步骤 A和步骤 C之间还设置步骤 B、判断压力值 V5是否在气道压力量程范围内， 若是则进入步骤 C， 若不是则进入步骤 F。
7、 根据权利要求 6所述的麻醉机用气道压力传感器开机自检方法， 其特征在于， 所述气道压力量程范围为 -2KPa〜13KPa。
8、 根据权利要求 5所述的麻醉机用气道压力传感器开机自检方法， 其特征在于， 所述传感器零点电压范围为 -0.5KPa〜0.5KPa。
9、 根据权利要求 5所述的麻醉机用气道压力传感器开机自检方法， 其特征在于， 所述时间 t2为 5〜10秒。
10、 一种如权利要求 1〜9任一所述的麻醉机用气道压力传感器开机自检方法在阀 门中的应用。
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