CN102397610A - Method for adjusting gradient of slope under anesthesia machine and breathing machine pressure control - Google Patents
Method for adjusting gradient of slope under anesthesia machine and breathing machine pressure control Download PDFInfo
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- CN102397610A CN102397610A CN2010102755807A CN201010275580A CN102397610A CN 102397610 A CN102397610 A CN 102397610A CN 2010102755807 A CN2010102755807 A CN 2010102755807A CN 201010275580 A CN201010275580 A CN 201010275580A CN 102397610 A CN102397610 A CN 102397610A
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Abstract
The invention discloses a method for adjusting gradient of a slope under anesthesia machine and breathing machine pressure control, which comprises the following steps of: (1) estimating the air resistance (R) value and the compliance (C) value of a patient by an R and C quick estimation technology in a control starting state; (2) in the suction starting process, calculating an average flow rate F in suction ascent time according to a formula F=Delta P/(E*Tramp+R); (3) setting an upper limit control flow rate in the time which is less than set suction time as F in a suction valve and expiration valve cooperative adjustment system; (4) regularly measuring the actual flow of a feedback valve output flow rate in the suction ascent time, and slowly increasing the valve output flow rate to the upper limit control flow rate F when the suction ascent time is in the set time and the valve output flow rate is less than the upper limit control flow rate F; and (5) eliminating control limit from the upper limit flow rate of the suction valve and expiration valve cooperative adjustment system and switching to suction valve and expiration valve cooperative pressure adjustment after the suction ascent time surpasses set ascent time.
Description
Technical field
The invention provides the method that a kind of new being used to solves anesthetic machine and the control of respirator pressure control downslope slope adjustment, regulate the air-breathing rise time to regulate the slope slope, can realize the control of accurate pressure slope according to Preset Time.The invention belongs to armarium manufacturing technology field.
Background technology
In anesthetic machine and respirator control, when using suction control valve and the collaborative work of expiration control valve,, be difficult to effectively realize the adjusting of air-breathing rise time because the air-breathing rise time is fixed.
At present, mainly contain two kinds at anesthetic machine and the mode of air-breathing rise time of respirator adjusted:
1, utilizes frame for movement to regulate gas feed flow rate, realize air-breathing rise time adjusting.The advantage of this method is that controlling organization is simple, can be easy to realize pressure slope control.Shortcoming is that the method mechanical part degree of regulation is poor, can not well ensure the precision of rise time;
2, utilize control algolithm adjustment flow-control threshold velocity, regulate to guarantee the air-breathing rise time.The advantage of this method is to utilize the valve control technology to realize that through the method for software hardware cost is low.Shortcoming is, this kind method requires the feedback control cycle very fast, and common microprocessor can't well be accomplished, and it is excessive to occur the pressure of inspiration(Pi) overshoot easily, causes windage, and air-breathing rise time control accuracy is not high, pind down by feedback control.
Summary of the invention
The objective of the invention is to cause not good problem of software adjustment rise time in the prior art because of hardware resource is limited; A kind of anesthetic machine, respirator pressure control downslope slope adjustment method are proposed; Utilize estimation R, C value to calculate the precision that required flow of air-breathing rise time guarantees the air-breathing rise time, eliminate the overshoot phenomenon that occurs when pressure of inspiration(Pi) is regulated.
Technical scheme of the present invention is following:
Anesthetic machine, respirator pressure control downslope slope adjustment method, the pressure control when being used for anesthetic machine and respirator suction control valve and the collaborative work of expiration control valve is characterized in that:
(1) in the control initial state, correctly do not monitor under the situation of patient R, C value,, utilize R, C fast estimation technique to estimate patient's R, C value during this period according to 50% carrying out a test property ventilation of setting pressure;
(2) air-breathing initial during, according to formula F=Δ P/ (E*Tramp+R), calculate and set required flow in the air-breathing rise time; Wherein F is a mean flow rate in the air-breathing rise time, and E is an electric conductance, and Tramp is the air-breathing rise time; R is a vapour lock, and E=1/C, C are compliance;
(3) in inlet valve and the collaborative regulating system of outlet valve, will be set at F less than the upper limit control flow velocity of setting in the inspiratory duration;
(4) actual flow of regularly measuring and calculating feedback valve output flow velocity in the air-breathing rise time; Be in the setting-up time when the air-breathing rise time; When the valve output flow velocity that monitors is controlled flow rate F less than the upper limit, adopt slow method for improving, valve is exported flow velocity slowly rise to upper limit control flow rate F;
(5) after the air-breathing rise time surpasses the set rise time, remove the collaborative regulating system flow velocity upper limit control of inlet valve and outlet valve restriction, transfer the collaborative pressure of inlet valve and outlet valve to and regulate.
Slow method for improving described in the step in the said method (4), specifically: monitoring the air-breathing rise time reach air-breathing rise time setting value 20% before, flow is slowly risen to upper limit control flow rate F; The air-breathing rise time of monitoring surpass air-breathing rise time setting value 20% after, carry out the constant current ventilation by upper limit control flow rate F.
The present invention utilizes the classical formulas in the pneodynamics principle that the air-breathing rise time under the pressure control is calculated; According to the control flow that calculates; Regulating flow control valve exports according to certain mode; In order to realize the adjusting of air-breathing rise time; Solved in the prior art and caused not good problem of software adjustment rise time, realized in the control of anesthetic machine and respirator pressure utilizing the accurate adjusting of software under the use traffic control valve mode the air-breathing rise time because of hardware resource is limited.
Description of drawings
Fig. 1 is an implementation block diagram of the present invention.
The specific embodiment
Fig. 1 is an implementation block diagram of the present invention, wherein:
100 open anesthetic machine and respirator, make it be in normal air feed duty, the control of initiation pressure control downslope slope adjustment;
110 utilize anesthetic machine and respirator inner sensor, through R, C fast estimation technique patient R, C value are estimated;
120 according to formula F=Δ P/ (E*Tramp+R), calculates maximum output control flow velocity in the set rise time; Wherein F is a mean flow rate in the air-breathing rise time, and E is an electric conductance, and Tramp is the air-breathing rise time, and R is a vapour lock, and E=1/C, C are compliance;
130 will be made as F less than the upper limit control flow velocity of setting in the inspiratory duration, the air-breathing rise time reach air-breathing rise time setting value 20% before, upper limit control flow rate F is adopted slow method for improving, flow is slowly risen to upper limit control flow rate F; The air-breathing rise time surpass air-breathing rise time setting value 20% after, valve positioner output control flow is adjusted to upper limit control flow rate F, according to the upper limit control flow rate F valve is carried out flow velocity PID control;
140 after surpassing the set rise time, controls according to compress control method, to reach required pressure.
Concrete performing step of the present invention is following:
Step 1, control initial state, correctly do not monitor under the situation of patient R, C value, according to 50% carrying out a test property ventilation of setting pressure, estimate patient's R, C value during this period with R, C fast estimation technique, R is a vapour lock, C is a compliance;
Step 2, air-breathing initial during, according to formula F=Δ P/ (E*Tramp+R), calculate and set required flow in the air-breathing rise time; Wherein F is a mean flow rate in the air-breathing rise time, and E is an electric conductance, and Tramp is the air-breathing rise time; R is a vapour lock, and E=1/C, C are compliance;
Step 3, in the collaborative regulating system of inlet valve and outlet valve, will be made as F less than the upper limit control flow velocity of setting in the inspiratory duration;
Step 4, the actual flow of regularly measuring and calculating feedback valve output flow velocity in the air-breathing rise time.Illustrate: be in the time of setting when the air-breathing rise time, when the valve output flow velocity that monitors is controlled flow rate F less than the upper limit, open through control valve, valve is exported flow velocity slowly rise to upper limit control flow rate F, concrete mode is following:
Monitoring the air-breathing rise time reach air-breathing rise time setting value 20% before; Upper limit control flow rate F is adopted slow method for improving; Flow is slowly risen to upper limit control flow rate F, such as: reach 5% o'clock of setting-up time in the rise time, air-breathing control flow velocity is made as 25% of upper limit control flow rate F; Reach 10% o'clock of setting-up time in the rise time; Air-breathing control flow velocity is made as 50% of upper limit control flow rate F,, air-breathing control flow velocity is made as upper limit control flow rate F in rise time 20% o'clock more than or equal to setting-up time;
The air-breathing rise time of monitoring surpass air-breathing rise time setting value 20% after; Carry out the constant current ventilation by upper limit control flow rate F; Valve positioner output control flow is adjusted to upper limit control flow rate F, valve is carried out flow velocity PID control according to upper limit control flow rate F;
Step 5, after surpassing the set rise time, remove inlet valve and the collaborative regulating system flow velocity upper limit control of outlet valve restriction, transfer inlet valve and outlet valve to and work in coordination with the pressure adjusting.
After reaching the set rise time; This moment, the pressure ordinary circumstance can be littler by about 10% than setting pressure; Remove the controller flow velocity upper limit control restriction this moment, utilizes pressure control that residual compression is risen to set pressure, because this moment is little from the setting pressure difference; Only need to supply with a less flow and just can reach, so pressure overshoot can not occur.
Claims (3)
1. anesthetic machine, respirator pressure are controlled downslope slope adjustment method, and the pressure control when being used for anesthetic machine and respirator suction control valve and the collaborative work of expiration control valve is characterized in that:
(1) in the control initial state, correctly do not monitor under the situation of patient R, C value,, utilize R, C fast estimation technique to estimate patient's R, C value during this period according to 50% carrying out a test property ventilation of setting pressure;
(2) air-breathing initial during, according to formula F=Δ P/ (E*Tramp+R), calculate and set required flow in the air-breathing rise time; Wherein F is a mean flow rate in the air-breathing rise time, and E is an electric conductance, and Tramp is the air-breathing rise time; R is a vapour lock, and E=1/C, C are compliance;
(3) in inlet valve and the collaborative regulating system of outlet valve, will be set at F less than the upper limit control flow velocity of setting in the inspiratory duration;
(4) actual flow of regularly measuring and calculating feedback valve output flow velocity in the air-breathing rise time; Be in the setting-up time when the air-breathing rise time; When the valve output flow velocity that monitors is controlled flow rate F less than the upper limit, adopt slow method for improving, valve is exported flow velocity slowly rise to upper limit control flow rate F;
(5) after the air-breathing rise time surpasses the set rise time, remove the collaborative regulating system flow velocity upper limit control of inlet valve and outlet valve restriction, transfer the collaborative pressure of inlet valve and outlet valve to and regulate.
2. anesthetic machine according to claim 1, respirator pressure control downslope slope adjustment method; It is characterized in that; Slow method for improving described in the step (4); Specifically: monitoring the air-breathing rise time reach air-breathing rise time setting value 20% before, flow is slowly risen to upper limit control flow rate F; The air-breathing rise time of monitoring surpass air-breathing rise time setting value 20% after, carry out the constant current ventilation by upper limit control flow rate F.
3. anesthetic machine according to claim 2, respirator pressure control downslope slope adjustment method; It is characterized in that: reach when the air-breathing rise time setting-up time 5% the time; Air-breathing control flow velocity is made as 25% of upper limit control flow rate F, reaches 10% o'clock of setting-up time, air-breathing control flow velocity is made as 50% of upper limit control flow rate F in the rise time; In rise time 20% o'clock, air-breathing control flow velocity is made as upper limit control flow rate F more than or equal to setting-up time.
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| CN201010275580.7A CN102397610B (en) | 2010-09-07 | 2010-09-07 | Method for adjusting gradient of slope under anesthesia machine and breathing machine pressure control |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106902431A (en) * | 2015-12-22 | 2017-06-30 | 北京谊安医疗系统股份有限公司 | The control method of ramp up time in turbine Anesthesia machine PCV ventilating modes |
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| US5546952A (en) * | 1994-09-21 | 1996-08-20 | Medtronic, Inc. | Method and apparatus for detection of a respiratory waveform |
| CN101132825A (en) * | 2005-03-04 | 2008-02-27 | Map医药-技术有限责任公司 | Device for administering a breathing gas and method for adjusting breathing gas pressures that alternate at least in some phases |
| CN101365507A (en) * | 2005-10-11 | 2009-02-11 | 伟亚医疗系统制造有限公司 | System and method for circuit compliance compensated volume control in a patient respiratory ventilator |
| WO2010070497A1 (en) * | 2008-12-19 | 2010-06-24 | Koninklijke Philips Electronics, N.V. | System and method for treating lung disease using positive pressure airway support |
| CN101757711A (en) * | 2008-12-11 | 2010-06-30 | 北京谊安医疗系统股份有限公司 | Ventilator and method for controlling pressure slope thereof |
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- 2010-09-07 CN CN201010275580.7A patent/CN102397610B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5546952A (en) * | 1994-09-21 | 1996-08-20 | Medtronic, Inc. | Method and apparatus for detection of a respiratory waveform |
| CN101132825A (en) * | 2005-03-04 | 2008-02-27 | Map医药-技术有限责任公司 | Device for administering a breathing gas and method for adjusting breathing gas pressures that alternate at least in some phases |
| CN101365507A (en) * | 2005-10-11 | 2009-02-11 | 伟亚医疗系统制造有限公司 | System and method for circuit compliance compensated volume control in a patient respiratory ventilator |
| CN101757711A (en) * | 2008-12-11 | 2010-06-30 | 北京谊安医疗系统股份有限公司 | Ventilator and method for controlling pressure slope thereof |
| WO2010070497A1 (en) * | 2008-12-19 | 2010-06-24 | Koninklijke Philips Electronics, N.V. | System and method for treating lung disease using positive pressure airway support |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106902431A (en) * | 2015-12-22 | 2017-06-30 | 北京谊安医疗系统股份有限公司 | The control method of ramp up time in turbine Anesthesia machine PCV ventilating modes |
| CN106902431B (en) * | 2015-12-22 | 2019-07-16 | 北京谊安医疗系统股份有限公司 | The control method of ramp up time in turbine Anesthesia machine PCV ventilating mode |
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Effective date of registration: 20221121 Address after: Building 2A, No. 77, Jinke South 2nd Road, Jinniu Hi tech Industrial Park, Chengdu, Sichuan 610036 Patentee after: Aerospace Changfeng Medical Technology (Chengdu) Co.,Ltd. Address before: 100854, Beijing Yongding Road, No. 51, Haidian District Aerospace digital control building Patentee before: BEIJING AEROSPACE CHANGFENG Co.,Ltd. |