CN108066864A - A kind of anesthesia respirator compress control method of inlet valve and outlet valve Collaborative Control - Google Patents

A kind of anesthesia respirator compress control method of inlet valve and outlet valve Collaborative Control Download PDF

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Publication number
CN108066864A
CN108066864A CN201611027129.7A CN201611027129A CN108066864A CN 108066864 A CN108066864 A CN 108066864A CN 201611027129 A CN201611027129 A CN 201611027129A CN 108066864 A CN108066864 A CN 108066864A
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CN
China
Prior art keywords
control
pressure
outlet valve
breathing
stepping
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Pending
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CN201611027129.7A
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Chinese (zh)
Inventor
刁俊
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Beijing Aerospace Changfeng Co Ltd
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Beijing Aerospace Changfeng Co Ltd
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Priority to CN201611027129.7A priority Critical patent/CN108066864A/en
Publication of CN108066864A publication Critical patent/CN108066864A/en
Pending legal-status Critical Current

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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
    • A61M16/0003—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
    • A61M16/01—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
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/1005—Preparation of respiratory gases or vapours with O2 features or with parameter measurement
    • 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
    • A61M2016/003—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter
    • A61M2016/0033—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical
    • A61M2016/0036—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical in the breathing tube and used in both inspiratory and expiratory phase
    • 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

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  • Health & Medical Sciences (AREA)
  • Anesthesiology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Pulmonology (AREA)
  • Biomedical Technology (AREA)
  • Emergency Medicine (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Feedback Control In General (AREA)

Abstract

The anesthesia respirator compress control method of a kind of inlet valve and outlet valve Collaborative Control in the pressure control mode, fuzzy control method is cooperateed with using traditional flow pressure, and flow velocity estimation fuzzy control is carried out to inlet valve pressure；Using pressure alteration situation in pressure sensor monitoring system, pressure changing in system is passed into expiration valve control unit, VCU, calculates outlet valve control deviation；Outlet valve carries out PID control using pressure sensor in breathing process to air-breathing setting pressure, and PID control is carried out to end-expiratory positive pressure in exhalation process；For outlet valve pid control parameter stepping, stepping scope is in 1cmH2O~80cmH2O according to required focus stepping, the pid control parameter under each pressure in focus is fitted with curve-fitting method or piecewise approximation after stepping, air-breathing and two valves of exhaling are controlled simultaneously during control.

Description

A kind of anesthesia respirator compress control method of inlet valve and outlet valve Collaborative Control
Technical field
The present invention relates to a kind of high-performance for being used to implement Anesthesia machine and lung ventilator, high-precision pressures to control ventilating mode, Belong to Medical Devices manufacturing technology field.
Background technology
It needs to carry out pressure controlled ventilation to some especial patients in Anesthesia machine and lung ventilator control.The pressure known at present There are three types of force control methods：
Pressure control is directly carried out to patient using pressure PID control, such method advantage is that algorithm realization is simple, It can be used for most special lesion patients using the PID pressure control realized in the case of high-performance processor.Shortcoming is, right In the patient of different lesions, R, C value of its own are different, using traditional pressure controling mode merely according to the pressure monitored The pressure change that can not be well adapted under various R, C is controlled whole system, hypoventilation is susceptible to or overshoot shows As, serious harm is generated to patient, and to realize high performance control, more R, C value patients are applicable in, it is necessary to using high property The processor of energy carries out real-time control process, and hardware cost is high.
Using fuzzy control technology, the direct PID control of pressure is carried out using pressure sensor.Advantage is, for different diseases The patient of change R, C value of its own is different, can be very good to solve to change due to patient R, C value using Pressure Fuzzy control mode Influence to entire pid control parameter.Shortcoming is, in the design process the domain gear and membership function in fuzzy control rule How many pairs of control algolithms of membership influence it is bigger, gear and the overstocked control algolithm of membership calculate overlong time, It needs quickly to realize that gear and membership are excessively thin with expensive DSP, regular including degree is inadequate, has under some R, C values Controlling value do not cover, cause occur over control in venting process, be especially extremely present with shake in special circumstances individually Phenomenon is swung, the ventilation burden of patient in the case of these special R, C values can be aggravated, trigger complication.
The velocity pressure being implemented in combination with using fuzzy control technology and classical formulas is controlled, and the method advantage is that solve It is insufficient existing for both the above method so that adaptation population is wider, safety and reliability higher.
But for comfort level angle, three of the above method is all there are one defect, after gas supply flow drops to 0LPM, due to Patient or system external interference and the pressure rise introduced, can not be in a short time by simply opening outlet valve in the case of this Pressure is re-established into setting pressure so that patient comfort is had a greatly reduced quality.
The content of the invention
It drops to after 0LPM in order to solving because of Anesthesia machine and lung ventilator the gas feed flow rate in pressure control and is answered by the external world The pressure rise problem risen, the present invention provide the anesthesia respirator pressure controlling party of a kind of inlet valve and outlet valve Collaborative Control Method, to solve the problems, such as because coutroi velocity be zeroed after caused by pressure rise.
Technical scheme is as follows：
A kind of anesthesia respirator compress control method of inlet valve and outlet valve Collaborative Control, it is characterised in that：
(1) in the pressure control mode, fuzzy control method is cooperateed with using traditional flow pressure, to inlet valve pressure into Row flow velocity estimates fuzzy control；
(2) using pressure alteration situation in pressure sensor monitoring system, pressure changing in system is passed to and is exhaled Air Valve Control unit calculates outlet valve control deviation；
(3) outlet valve carries out PID control using pressure sensor in breathing process to air-breathing setting pressure, is exhaling Journey carries out end-expiratory positive pressure PID control, and air-breathing control and expiration control algolithm use the identical feedback control time；By exhaling Air valve PID control unit addition bias current limitation parameter realizes that bias current is adjusted under different situations under air-breathing and expiration state；
(4) it is outlet valve pid control parameter stepping, stepping scope is in 1cmH2O~80cmH2O according to required focus Stepping is intended the pid control parameter under each pressure in focus with curve-fitting method or piecewise approximation after stepping With；
(5) by finely tune inlet valve and outlet valve pid control parameter and Kalman feedback estimations coefficient by two valves The relation of itself is adjusted to an optimum state, and air-breathing and two valves of exhaling are controlled simultaneously during control, feedback control Cycle processed is any one fixed value in 1~10ms.
The present invention using inspiration flow control valve and outlet valve Collaborative Control, according to setting pressure carry out air-breathing phase pressure and Expiratory phase pressure dual controls, and solves the gas feed flow rate in pressure control because of Anesthesia machine and lung ventilator and drops to after 0LPM by outer The pressure rise problem that boundary should rise, and incidentally solve end-expiratory positive pressure in traditional algorithm and establish slowly, air-breathing turns to exhaling When changing, pressure drops to the slow-footed problem of end-expiratory positive pressure from setting pressure, improves patient comfort.
Description of the drawings
Fig. 1 is the realization procedural block diagram of the present invention.
Specific embodiment
Shown in Fig. 1, Anesthesia machine, the lung ventilator compress control method bag of inlet valve of the invention and outlet valve Collaborative Control It includes：
Inlet valve cooperates with fuzzy control method according to traditional flow pressure, using fuzzy controller to inlet valve pressure Power carries out flow control；
Pressure control is carried out to outlet valve pressure using pressure PID control；
Coordinate the relation between two valves, it is anti-by the pid control parameter and Kalman of finely tuning inlet valve and outlet valve The relation of two valves itself is adjusted to an optimum state by feedback estimation coefficient.
Air-breathing and two valves of exhaling are controlled simultaneously during control.According to air-breathing, expiratory flow sensor, pressure Rapport between sensor and two valves carries out pressure feedback control.Such as：In inspiratory phase, traditional flow pressure association It is calculated with fuzzy control method and flow is controlled needed for inlet valve, control valve is to reach control flow, and outlet valve is according to setting Pressure progressively closes off valve, until valve output flow reaches limitation flow, with excessively continuous feedback control, by the input of the two A kind of correlated state is reached in output, can realize pressure of inspiration(Pi) control.
The specific implementation of the present invention is as follows：
Step 1. cooperates with fuzzy control method in the pressure control mode, using traditional flow pressure, to inlet valve pressure Power carries out flow velocity estimation fuzzy control；
Step 2. is passed to pressure changing in system using pressure alteration situation in pressure sensor monitoring system Expiration valve control unit, VCU calculates outlet valve control deviation；
Step 3. outlet valve carries out PID control using pressure sensor in breathing process to air-breathing setting pressure, is exhaling Gas process carries out PID control to end-expiratory positive pressure；
Step 4. is outlet valve pid control parameter stepping, and stepping scope is in 1cmH2O~80cmH2O according to required concern Stepping is put, is carried out the pid control parameter under each pressure in focus with curve-fitting method or piecewise approximation after stepping It fits；
Step 5. by finely tune inlet valve and outlet valve pid control parameter and Kalman feedback estimations coefficient by two valves The door relation of itself is adjusted to an optimum state, and air-breathing and two valves of exhaling are controlled simultaneously during control.
The air-breathing control of the present invention and expiration control algolithm are using identical feedback control time, identical feedback control time Lower control effect is optimal.
The present invention passes through different under adding bias current limitation parameter realization air-breathing and expiration state in outlet valve PID control unit In the case of bias current adjust, this part work can promote patient comfort, limited by this bias current, can triggering control model Under, promote patient's trigger sensitivity so that patient is autonomous, and air-breathing is more smooth.
The feedback control cycle of the present invention for any one fixed value in 1~10ms, the control effect in the range of this time Most preferably, the setting of feedback time is depending on the characteristic of selected microprocessor, and the feedback cycle time is shorter, and patient comfort is got over Height can also realize this air-breathing outlet valve Collaborative Control algorithm, but patient comfort more than the feedback vacant cycle in the case of 10ms It is not especially desirable.

Claims (1)

1. a kind of anesthesia respirator compress control method of inlet valve and outlet valve Collaborative Control, it is characterised in that：
(1) in the pressure control mode, fuzzy control method is cooperateed with using traditional flow pressure, inlet valve pressure is flowed Speed estimation fuzzy control；
(2) using pressure alteration situation in pressure sensor monitoring system, pressure changing in system is passed into outlet valve Control unit calculates outlet valve control deviation；
(3) outlet valve carries out PID control using pressure sensor in breathing process to air-breathing setting pressure, in exhalation process pair End-expiratory positive pressure carries out PID control, and air-breathing control and expiration control algolithm use the identical feedback control time；By in outlet valve PID control unit addition bias current limitation parameter realizes that bias current is adjusted under different situations under air-breathing and expiration state；
(4) for outlet valve pid control parameter stepping, stepping scope in 1cmH2O~80cmH2O according to required focus stepping, The pid control parameter under each pressure in focus is fitted with curve-fitting method or piecewise approximation after stepping；
(5) by finely tune inlet valve and outlet valve pid control parameter and Kalman feedback estimations coefficient by two valves itself Relation be adjusted to an optimum state, during control to air-breathing and exhale two valves control simultaneously, feedback control week Phase is any one fixed value in 1~10ms.
CN201611027129.7A 2016-11-16 2016-11-16 A kind of anesthesia respirator compress control method of inlet valve and outlet valve Collaborative Control Pending CN108066864A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611027129.7A CN108066864A (en) 2016-11-16 2016-11-16 A kind of anesthesia respirator compress control method of inlet valve and outlet valve Collaborative Control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611027129.7A CN108066864A (en) 2016-11-16 2016-11-16 A kind of anesthesia respirator compress control method of inlet valve and outlet valve Collaborative Control

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CN108066864A true CN108066864A (en) 2018-05-25

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109621114A (en) * 2018-12-17 2019-04-16 湖南城市学院 A kind of mechanical ventilation mode, pressure control method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109621114A (en) * 2018-12-17 2019-04-16 湖南城市学院 A kind of mechanical ventilation mode, pressure control method

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Application publication date: 20180525

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