CN103071221B - Compliance compensation capacity guaranteeing method for anesthesia machine and respirator - Google Patents
Compliance compensation capacity guaranteeing method for anesthesia machine and respirator Download PDFInfo
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- CN103071221B CN103071221B CN201110326214.4A CN201110326214A CN103071221B CN 103071221 B CN103071221 B CN 103071221B CN 201110326214 A CN201110326214 A CN 201110326214A CN 103071221 B CN103071221 B CN 103071221B
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Abstract
The invention discloses a compliance compensation capacity guaranteeing method for an anesthesia machine and a respirator. The anesthesia machine and the respirator are firstly started to carry out compliance self-checking to system connecting pipelines of the anesthesia machine and the respirator, the pipeline volume at time t is worked out according to the self-checking result, and the instantaneous patient inhale volume is worked out according to the pipeline volume at the time t; the calculated instantaneous patient inhale volume value is compared with a preset humid air volume value, whether the calculated instantaneous patient inhale volume value reaches the preset humid air volume value or not is judged, if not, gas is continuously supplied; if the calculated instantaneous patient inhale volume value reaches or exceeds the preset humid air volume value, the state is switched into a breath-holding control state until the inhale is over and the exhale switching time arrives, and the excess portion is released; when the inhale is over, the humid air volume of exhale is monitored, the difference of the exhale humid air volume and a preset humid air volume is worked out, part of the exhale humid air volume, which is lower than the preset humid air volume, is compensated through feedback, and part of the exhale humid air volume, which exceeds the preset humid air volume, is not weakened.
Description
Technical field
The present invention relates to a kind of anesthetic machine, respirator compliance compensation capacity support method, control lower patient suck tidal volume degree of accuracy for promoting anesthetic machine and respirator amount, improve the safety under capacity ventilation, belong to armarium manufacturing technology field.
Background technology
In anesthetic machine and respirator control, volume control is usually using the feedback control parameters of the monitoring tidal volume in last cycle as this tidal volume, substitution system carries out feedback control, utilize formula VT=Δ V* (C-Ctube)/C, calculate patient's tidal volume, wherein Δ V tidal volume change, patient VT sucks tidal volume, C entire system compliance, Ctube circuit compliance.The VT calculated is brought into formula VT '=VT+ Δ VT*K, calculate tidal volume deviation and feedback controls, wherein VT ' should reach tidal volume for the lower cycle, and Δ VT is the difference that default tidal volume deducts patient's tidal volume.This kind of method easily produces concussion, and there will be tidal volume over control.
Summary of the invention
The object of the present invention is to provide a kind of can ensure anesthetic machine and respirator control in tidal volume control stable method, reduce in adjustment process because of the excessive injury to human body of tidal volume.
A kind of anesthetic machine, respirator compliance compensation capacity support method, is characterized in that, comprise the steps:
(1) utilize RC fast estimation technique, start shooting and circuit compliance Ctube is carried out to anesthetic machine and respirator connecting line carry out self-inspection;
(2) calculate t circuit capacity Vtube (t) according to the circuit compliance Ctube of self-inspection, calculate and adopt following formula:
Vtube(t)＝P(t)-P(t-1)*Ctube，
The wherein patient end pressure that monitors for t of P (t), P (t-1) is patient end previous moment pressure;
(3) according to t circuit capacity Vtube (t) that step (2) calculates, Real-Time Monitoring also calculates instantaneous inlet capacity Vt (t) of t patient, calculates and adopts following formula:
Vt(t)＝Vs(t)-Vtube(t)，
Wherein Vs (t) is t anesthetic machine and respirator system output capacity;
(4) when the Vt (t) monitored is more than or equal to setting tidal volume VTset, control system is switched into controlled state of holding one's breath, wait for that switching time of exhaling arrives, utilize suction control valve and exhalation control valve collaboration working method in controlled state of holding one's breath simultaneously, the capacity more than VTset part is discharged;
(5) inspiratory duration is by rear monitoring exhalation flow rate and system expiration tidal volume Vs, and calculates patient exhales tidal volume VT, calculates and adopts following formula:
VT＝Vs-(Ppeak-PEEP)*Ctube，
Wherein Vs is system monitoring expiration tidal volume, and Ppeak is patient inhales surge pressure, and PEEP is patient exhales end malleation;
(6) utilize formula Δ VT=VTset-VT to calculate patient exhales tidal volume VT and the difference of setting tidal volume VTset, by feedback, the part lower than setting tidal volume is compensated, the part exceeding setting tidal volume is not weakened.
The present invention utilizes the patient's inlet capacity and circuit compliance parameter that real-time monitor, realizes the accurate control to tidal volume, improves tidal volume control accuracy, reduces the generation that tidal volume regulates over control.
Accompanying drawing explanation
Fig. 1 is realization flow figure of the present invention
Detailed description of the invention
Below in conjunction with the realization flow figure of the invention shown in accompanying drawing 1, the specific embodiment of the present invention is described.
As shown in Figure 1, the realization approach that the present invention is total is:
Preset and allow tidal volume; Ensure in control procedure at capacity, first start shooting and carry out circuit compliance self-inspection to anesthetic machine and respirator system connecting line, calculating t according to self-detection result is circuit capacity, is that circuit capacity calculates instantaneous patient's inlet capacity according to t; The instantaneous patient's inlet capacity value calculated and default tidal volume values are contrasted, sees and whether reach default tidal volume, if do not reach, continue air feed; If meet or exceed, then switch to controlled state of holding one's breath, wait for that air-breathing terminates, switching time of exhaling arrives, and overage is discharged simultaneously; After air-breathing terminates, monitoring expiration tidal volume, and calculate expiration tidal volume and the difference of setting tidal volume, by feedback, the part lower than setting tidal volume is compensated, the part exceeding setting tidal volume is not weakened.
Concrete methods of realizing of the present invention is as follows:
(1) utilize RC fast estimation technique, start shooting and circuit compliance Ctube is carried out to anesthetic machine and respirator connecting line carry out self-inspection;
(2) calculate t circuit capacity Vtube (t) according to the circuit compliance Ctube of self-inspection, calculate and adopt following formula:
Vtube(t)＝P(t)-P(t-1)*Ctube，
The wherein patient end pressure that monitors for t of P (t), P (t-1) is patient end previous moment pressure;
(3) according to t circuit capacity Vtube (t) that step (2) calculates, Real-Time Monitoring also calculates instantaneous inlet capacity Vt (t) of t patient, calculates and adopts following formula:
Vt(t)＝Vs(t)-Vtube(t)，
Wherein Vs (t) is t anesthetic machine and respirator system output capacity;
(4) when the Vt (t) monitored is more than or equal to setting tidal volume VTset, control system is switched into controlled state of holding one's breath, wait for that switching time of exhaling arrives, utilize suction control valve and exhalation control valve collaboration working method in controlled state of holding one's breath simultaneously, the capacity more than VTset part is discharged;
(5) inspiratory duration is by rear monitoring exhalation flow rate and system expiration tidal volume Vs, and calculates patient exhales tidal volume VT, calculates and adopts following formula:
VT＝Vs-(Ppeak-PEEP)*Ctube，
Wherein Vs is system monitoring expiration tidal volume, and Ppeak is patient inhales surge pressure, and PEEP is patient exhales end malleation;
(6) utilize formula Δ VT=VTset-VT to calculate patient exhales tidal volume VT and the difference of setting tidal volume VTset, by feedback, the part lower than setting tidal volume is compensated, the part exceeding setting tidal volume is not weakened.
In above-mentioned steps (4), to the capacity more than VTset part according to policy setting release time of slow releasing, release time, scope was 1ms ~ 500ms, according to the machine system corresponding speed adjustment release time.
In above-mentioned steps (4), volume change is utilized to carry out flow PID adjustment according to the principle of QI invigorating and release to capacity to inlet valve and outlet valve in the stage of holding one's breath.
Claims (3)
1. anesthetic machine, a respirator compliance compensation capacity support method, is characterized in that, comprise the steps:
(1) utilize RC fast estimation technique, start shooting and circuit compliance Ctube is carried out to anesthetic machine and respirator connecting line carry out self-inspection;
(2) calculate t circuit capacity Vtube (t) according to the circuit compliance Ctube of self-inspection, calculate and adopt following formula:
Vtube(t)＝P(t)-P(t-1)*Ctube，
The wherein patient end pressure that monitors for t of P (t), P (t-1) is patient end previous moment pressure;
(3) according to t circuit capacity Vtube (t) that step (2) calculates, Real-Time Monitoring also calculates instantaneous inlet capacity Vt (t) of t patient, calculates and adopts following formula:
Vt(t)＝Vs(t)-Vtube(t)，
Wherein Vs (t) is t anesthetic machine and respirator system output capacity;
(4) when the Vt (t) monitored is more than or equal to setting tidal volume VTset, control system is switched into controlled state of holding one's breath, wait for that switching time of exhaling arrives, utilize suction control valve and exhalation control valve collaboration working method in controlled state of holding one's breath simultaneously, the capacity more than VTset part is discharged;
(5) inspiratory duration is by rear monitoring exhalation flow rate and system expiration tidal volume Vs, and calculates patient exhales tidal volume VT, calculates and adopts following formula:
VT＝Vs-(Ppeak-PEEP)*Ctube，
Wherein Vs is system monitoring expiration tidal volume, and Ppeak is patient inhales surge pressure, and PEEP is patient exhales end malleation;
(6) utilize formula Δ VT=VTset-VT to calculate patient exhales tidal volume VT and the difference of setting tidal volume VTset, by feedback, the part lower than setting tidal volume is compensated, the part exceeding setting tidal volume is not weakened.
2. anesthetic machine according to claim 1, respirator compliance compensation capacity support method, it is characterized in that: in described step (4), to the capacity more than VTset part according to policy setting release time of slow releasing, release time, scope was 1ms ~ 500ms, according to the machine system corresponding speed adjustment release time.
3. anesthetic machine according to claim 2, respirator compliance compensation capacity support method, is characterized in that: utilize volume change to carry out flow PID adjustment according to the principle of QI invigorating and release to capacity to inlet valve and outlet valve in the stage of holding one's breath.
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| CN201110326214.4A CN103071221B (en) | 2011-10-25 | 2011-10-25 | Compliance compensation capacity guaranteeing method for anesthesia machine and respirator |
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| CN201110326214.4A CN103071221B (en) | 2011-10-25 | 2011-10-25 | Compliance compensation capacity guaranteeing method for anesthesia machine and respirator |
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| CN106913946A (en) * | 2015-12-25 | 2017-07-04 | 北京谊安医疗系统股份有限公司 | A kind of method that tidal volume is adjusted under IPPV ventilating modes |
| CN106924851A (en) * | 2015-12-29 | 2017-07-07 | 北京谊安医疗系统股份有限公司 | Anesthesia machine capacity control method based on Fuzzy Adaptive PID Control |
| CN110975089A (en) * | 2019-12-20 | 2020-04-10 | 广州和普乐健康科技有限公司 | Tidal volume calculation method and device, storage medium and breathing machine |
| CN113342080B (en) * | 2021-06-20 | 2022-06-28 | 三河科达实业有限公司 | Breathing module turbine variable speed control method of portable universal life support system |
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| 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 |
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| US7918223B2 (en) * | 2005-11-09 | 2011-04-05 | Carefusion 207, Inc. | System and method for circuit compliance compensated pressure-regulated volume control in a patient respiratory ventilator |
| US8474455B2 (en) * | 2006-01-10 | 2013-07-02 | Carefusion 207, Inc. | System and method for circuit compliance compensated volume assured pressure control in a patient respiratory ventilator |
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| 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 |
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Effective date of registration: 20221117 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. |