CN102028997B - Mode switching method for anaesthesia machine or breathing machine - Google Patents

Mode switching method for anaesthesia machine or breathing machine Download PDF

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CN102028997B
CN102028997B CN200910235638.2A CN200910235638A CN102028997B CN 102028997 B CN102028997 B CN 102028997B CN 200910235638 A CN200910235638 A CN 200910235638A CN 102028997 B CN102028997 B CN 102028997B
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inspiratory
pattern
time
excursion
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CN102028997A (en
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丛玉孟
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Beijing Aeonmed Co Ltd
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Beijing Aeonmed Co Ltd
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Abstract

The invention provides a mode switching method for an anaesthesia machine or a breathing machine, which comprises the following steps of: acquiring an initial value of a parameter of a second mode after mode switching according to a parameter of a first mode, wherein the inspiratory expiratory ratio of the second mode is calculated according to the frequency and inspiratory time of the first mode, and the tidal volume, frequency, breath-holding time and end-expiratory pressure of the second mode are the same as corresponding parameter values of the first mode; judging whether the initial value meets a first judgment condition according to the first judgment condition; and if the initial value does not meet a first judgment condition, adjusting the breath-holding time, the inspiratory expiratory ratio and the frequency of the second mode to make the tidal volume of the second mode equal to that of the first mode.

Description

For the mode switching method of anesthetic machine or respirator
Technical field
The present invention relates to medical field, in particular to a kind of mode switching method for anesthetic machine or respirator.
Background technology
Anesthetic machine and respirator become Routine Medical Device, in the first aid being widely used in each clinical department and intensive care unit(ICU).Anesthetic machine or respirator generally have several breathing pattern, and doctor can carry out the switching of breathing pattern according to different patients and different situations.
In prior art, when from SIMV (Synchronised Intermittent Mandatory Ventilation, the ventilation of synchronous intermittent mandatory) pattern is switched to IPPV (Intermittent Positive Pressure Ventilation, intermittent positive pressure ventilation) pattern time, adopt acquiescence patient parameter arrange.
Inventor finds mode switching method of the prior art, and the inconsistent meeting of the optimum configurations of different mode makes inspiratory/expiratory and frequency change, and then tidal volume can be caused to change, thus causes certain risk to the treatment of patient.
Summary of the invention
The present invention aims to provide a kind of mode switching method for anesthetic machine or respirator, mode switching method of the prior art can be solved, the inconsistent meeting of the optimum configurations of different mode makes inspiratory/expiratory and frequency change, and then tidal volume can be caused to change, thus the problem of certain risk is caused to the treatment of patient.
In an embodiment of the present invention, provide a kind of mode switching method for anesthetic machine or respirator, comprise the following steps:
The initial value of the parameter of the second pattern after switching according to the parameter acquisition mode of first mode, wherein, the inspiratory/expiratory of the second pattern calculates according to the frequency of first mode and inspiratory duration and obtains, and the tidal volume of the second pattern, frequency, breath holding time press the parameter value corresponding with first mode identical with end-tidal;
Adopt the first criterion to judge initial value, judge whether initial value meets the first criterion;
If initial value does not meet the first criterion, the breath holding time of the second pattern, inspiratory/expiratory and frequency are regulated, keeps equal with the tidal volume of the tidal volume with first mode that make the second pattern.
In the above-described embodiments, switch in the process of the second pattern at first mode, by adopting the first criterion, the initial value after conversion is judged, judge whether initial value meets the first criterion, if initial value does not meet the first criterion, to the breath holding time of the second pattern, inspiratory/expiratory and frequency carry out the mode regulated, the tidal volume of the second pattern is made to keep equal with the tidal volume of first mode, thus achieve when the optimum configurations of different mode is inconsistent, tidal volume can remain unchanged, overcome mode switching method of the prior art, the inconsistent meeting of the optimum configurations of different mode makes inspiratory/expiratory and frequency change, and then tidal volume can be caused to change, thus the treatment of patient is caused to the problem of certain risk.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the mode switching method flow chart for anesthetic machine or respirator according to an embodiment of the invention;
Fig. 2 shows the mode switching method flow chart for anesthetic machine or respirator according to a preferred embodiment of the present invention.
Detailed description of the invention
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Fig. 1 shows the mode switching method flow chart for anesthetic machine or respirator according to an embodiment of the invention, comprises the following steps:
S102, the initial value of the parameter of the second pattern after switching according to the parameter acquisition mode of first mode, wherein, the inspiratory/expiratory of the second pattern calculates according to the frequency of first mode and inspiratory duration and obtains, and the ratio that the tidal volume of the second pattern, frequency, breath holding time account for an inspiratory phase time presses the parameter value corresponding with first mode identical with end-tidal;
S104, adopts the first criterion to judge initial value, judges whether initial value meets the first criterion;
S106, if initial value does not meet the first criterion, accounts for the ratio of an inspiratory phase time, inspiratory/expiratory and frequency to the breath holding time of the second pattern and regulates, keep equal with the tidal volume of the tidal volume with first mode that make the second pattern.
In the present embodiment, switch in the process of the second pattern at first mode, by adopting the first criterion, the initial value after conversion is judged, judge whether initial value meets the first criterion, if initial value does not meet the first criterion, the breath holding time of the second pattern is accounted for the ratio of an inspiratory phase time, inspiratory/expiratory and frequency carry out the mode regulated, the tidal volume of the second pattern is made to keep equal with the tidal volume of first mode, thus achieve when the optimum configurations of different mode is inconsistent, tidal volume can remain unchanged, overcome mode switching method of the prior art, the inconsistent meeting of the optimum configurations of different mode makes inspiratory/expiratory and frequency change, and then tidal volume can be caused to change, thus the treatment of patient is caused to the problem of certain risk.
Preferably, above-mentioned in the mode switching method of anesthetic machine or respirator, the first criterion specifically comprises: F min ≤ 60 * V t 60 Fre * I I + E * ( 1 - T p ) ≤ F max ; 60 Fre * I I + E * ( 1 - T p ) ≥ T min insp ; wherein, represent expiratory duration minima, represent inspiratory duration minima, T prepresent that breath holding time accounts for the ratio of an inspiratory phase time, F minrepresent minimum flow velocity, F maxrepresent Peak Flow Rate, V trepresent tidal volume, represent inspiratory/expiratory, Fre represents frequency.
Preferably, above-mentioned in the mode switching method of anesthetic machine or respirator, the breath holding time of the second pattern accounts for the ratio of an inspiratory phase time, inspiratory/expiratory and frequency to carry out regulating specifically comprising: if initial value meets the first criterion, implement the switching of first mode to the second pattern, if initial value does not meet the first criterion, regulate the breath holding time of the second pattern to account for the ratio of an inspiratory phase time, obtain the first numerical value of the second pattern after regulating; Adopt the first criterion to judge to the first numerical value, judge whether the first numerical value meets the first Rule of judgment; If the first numerical value meets the first criterion, implement the switching of first mode to the second pattern, if the first numerical value does not meet the first criterion, regulate the inspiratory/expiratory of the second pattern, obtain the second value of the second pattern after regulating; Adopt the first criterion to judge to second value, judge whether second value meets the first Rule of judgment; If second value meets the first criterion, implement the switching of first mode to the second pattern, if second value does not meet the first criterion, regulate the frequency of the second pattern, obtain the third value of the second pattern after regulating.
Preferably, above-mentioned in the mode switching method of anesthetic machine or respirator, the ratio regulating the breath holding time of the second pattern to account for an inspiratory phase time specifically comprises: when T min insp * F max 60 ≤ V t Time, according to V t * Fre F max ≤ I I + E * ( 1 - T p ) ≤ V t * Fre F min Calculate the excursion that breath holding time accounts for the ratio of an inspiratory phase time; In excursion, the ratio that breath holding time accounts for an inspiratory phase time is regulated.
Preferably, above-mentioned in the mode switching method of anesthetic machine or respirator, the ratio regulating the breath holding time of the second pattern to account for an inspiratory phase time specifically comprises: when T min insp * F min 60 ≤ V t ≤ T min insp * F max 60 Time, according to T min insp * Fre 60 ≤ I I + E * ( 1 - T p ) ≤ V t * Fre F min Calculate the excursion that breath holding time accounts for the ratio of an inspiratory phase time; In excursion, the ratio that breath holding time accounts for an inspiratory phase time is regulated.
The method that the breath holding time calculating the second pattern accounts for the excursion of the ratio of an inspiratory phase time is according to the constant demand of tidal volume, obtain from first condition conversion, the inequality accounting for the ratio of an inspiratory phase time with breath holding time relevant in first condition is F min ≤ 60 * V t 60 Fre * I I + E * ( 1 - T p ) ≤ F max With 60 Fre * I I + E * ( 1 - T p ) ≥ T min insp , Obtain through conversion V t * Fre F max ≤ I I + E * ( 1 - T p ) ≤ V t * Fre F min With T min insp * Fre 60 ≤ I I + E * ( 1 - T p ) . According to the demand that tidal volume is constant, draw and calculate the method that breath holding time accounts for the excursion of the ratio of an inspiratory phase time.Further, when time, inequality is without solution.
Preferably, above-mentioned in the mode switching method of anesthetic machine or respirator, the inspiratory/expiratory of the second pattern is regulated specifically to comprise: when time, according to V t * Fre F max ≤ I I + E * ( 1 - T p ) ≤ V t * Fre F min With I I + E * ( 1 - T p ) ≤ ( 1 - T p ) * ( 1 - T min exp * Fre 60 ) , Calculate the excursion of inspiratory/expiratory; When time, according to T min insp * Fre 60 ≤ I I + E * ( 1 - T p ) ≤ V t * Fre F min With I I + E * ( 1 - T p ) ≤ ( 1 - T p ) * ( 1 - T min exp * Fre 60 ) Calculate the excursion of inspiratory/expiratory; In excursion, inspiratory/expiratory is regulated.
Preferably, above-mentioned in the mode switching method of anesthetic machine or respirator, the method calculating inspiratory/expiratory excursion specifically comprises: when time, according to calculate the excursion of inspiratory/expiratory; When V t * Fre F min > ( 1 - T p ) * ( 1 - T min exp * Fre 60 ) , According to V t * Fre F max ≤ I I + E * ( 1 - T p ) ≤ ( 1 - T p ) * ( 1 - T min exp * Fre 60 ) Calculate the excursion of inspiratory/expiratory; When V t * Fre F min ≤ ( 1 - T p ) * ( 1 - T min exp * Fre 60 ) Time, according to T min insp * Fre 60 ≤ I I + E * ( 1 - T p ) ≤ V t * Fre F min Calculate the excursion of inspiratory/expiratory; When according to T min insp * Fre 60 ≤ I I + E * ( 1 - T p ) ≤ ( 1 - T p ) * ( 1 - T min exp * Fre 60 ) Calculate the excursion of inspiratory/expiratory.
Preferably, above-mentioned in the mode switching method of anesthetic machine or respirator, the frequency of the second pattern is regulated specifically to comprise: when time, according to V t * Fre F max ≤ I I + E * ( 1 - T p ) ≤ V t * Fre F min With I I + E * ( 1 - T p ) ≤ ( 1 - T p ) * ( 1 - T min exp * Fre 60 ) , The excursion of calculated rate; When time, according to T min insp * Fre 60 ≤ I I + E * ( 1 - T p ) ≤ V t * Fre F min With I I + E * ( 1 - T p ) ≤ ( 1 - T p ) * ( 1 - T min exp * Fre 60 ) The excursion of calculated rate; In excursion, frequency is regulated.
Preferably, above-mentioned in the mode switching method of anesthetic machine or respirator, the method for the excursion of calculated rate specifically comprises: when time, according to I I + E * ( 1 - T p ) * F min V t ≤ Fre ≤ I I + E * ( 1 - T p ) * F max V t The excursion of calculated rate; When V t * Fre F min > ( 1 - T p ) * ( 1 - T min exp * Fre 60 ) Time, according to ( 1 - I I + E ) * 60 T min exp ≤ Fre ≤ I I + E * ( 1 - T p ) * F max V t Calculate the excursion of frequency spectrum; When time, according to I I + E * ( 1 - T p ) * F min V t ≤ Fre ≤ I I + E * ( 1 - T p ) * 60 T min insp The excursion of calculated rate; When V t * Fre F min > ( 1 - T p ) * ( 1 - T min exp * Fre 60 ) , According to ( 1 - I I + E ) * 60 T min exp ≤ Fre ≤ I I + E * ( 1 - T p ) * 60 T min insp The excursion of calculated rate.
Preferably, above-mentioned in the mode switching method of anesthetic machine or respirator, the breath holding time of the second pattern accounts for the ratio of an inspiratory phase time, inspiratory/expiratory and frequency to carry out regulating also comprising: adopt the first criterion to judge to third value, judge whether third value meets the first Rule of judgment; If third value meets the first criterion, implement the switching of first mode to the second pattern, if third value does not meet the first criterion, exit all adjustments.
Fig. 2 shows the mode switching method flow chart for anesthetic machine or respirator according to a preferred embodiment of the present invention, specifically comprises:
S201, when being switched to IPPV pattern by SIMV pattern, the IE (inspiratory/expiratory) of IPPV is calculated by the frequency of SIMV and inspiratory duration, and meets absolute value nearby principle; The tidal volume of IPPV, frequency, breath holding time accounts for the ratio of an inspiratory phase time, and PEEP (end expiratory positive pressure) inherits the parameter of SIMV;
S202, judges whether initial parameter meets 60 Fre * I I + E * ( 1 - T p ) ≥ T min insp With 60 Fre * E I + E ≥ T min exp , If meet, do not need to regulate parameter, switching completes, and switches to IPPV pattern; If do not meet, go to step S203;
S203, regulates breath holding time to account for the ratio T of an inspiratory phase time p;
S204, judges whether each parameter value after regulating breath holding time to account for the ratio of an inspiratory phase time meets F min ≤ 60 * V t 60 Fre * I I + E * ( 1 - T p ) ≤ F max , 60 Fre * I I + E * ( 1 - T p ) ≥ T min insp With if meet, switching completes, and switches to IPPV pattern; If do not meet, go to step S205;
S205, regulates inspiratory/expiratory;
S206, judges whether each parameter value after regulating inspiratory/expiratory meets F min ≤ 60 * V t 60 Fre * I I + E * ( 1 - T p ) ≤ F max , 60 Fre * I I + E * ( 1 - T p ) ≥ T min insp With 60 Fre * E I + E ≥ T min exp , If meet, switching completes, and switches to IPPV pattern; If do not meet, go to step S207;
S207, regulating frequency;
S208, judges whether each parameter value after regulating frequency meets F min ≤ 60 * V t 60 Fre * I I + E * ( 1 - T p ) ≤ F max , 60 Fre * I I + E * ( 1 - T p ) ≥ T min insp With 60 Fre * E I + E ≥ T min exp , If meet, switching completes, and switches to IPPV pattern; If do not meet, go to step S209;
S209, handoff error, exits all adjustments.
Software simulating framework is as follows according to an embodiment of the invention:
In the present embodiment, by adopting the mode judged each initial parameter value when switching to IPPV pattern, if initial value does not meet the first criterion, the breath holding time of the second pattern is accounted for the ratio of an inspiratory phase time, inspiratory/expiratory and frequency regulate, the tidal volume of the second pattern is made to keep equal with the tidal volume of first mode, thus achieve when the optimum configurations of different mode is inconsistent, tidal volume can remain unchanged, overcome mode switching method of the prior art, the inconsistent meeting of the optimum configurations of different mode makes inspiratory/expiratory and frequency change, and then tidal volume can be caused to change, thus the treatment of patient is caused to the problem of certain risk.Account for the optimal parameter of the ratio of an inspiratory phase time, inspiratory/expiratory and frequency according to the limit value of tidal volume search breath holding time, make the change of tidal volume between two kinds of patterns minimum, be suitable for the respiratory nursing of patient, improve the safety in utilization of anesthetic machine or respirator; Be convenient to the operation of medical personnel.Heighten operating efficiency, reduce complexity.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general accountant, they can concentrate on single accountant, or be distributed on network that multiple accountant forms, alternatively, they can realize with the executable program code of accountant, thus they storages can be performed by accountant in the storage device, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (9)

1., for a mode switching method for anesthetic machine or respirator, it is characterized in that, comprise the following steps:
The initial value of the parameter of the second pattern after switching according to the parameter acquisition mode of first mode, wherein, the inspiratory/expiratory of described second pattern calculates according to the frequency of described first mode and inspiratory duration and obtains, and the ratio that the tidal volume of described second pattern, frequency, breath holding time account for an inspiratory phase time presses the parameter value corresponding with described first mode identical with end-tidal;
Adopt the first criterion to judge described initial value, judge whether described initial value meets the first criterion;
If described initial value does not meet described first criterion, the ratio of an inspiratory phase time, inspiratory/expiratory and frequency are accounted for the breath holding time of described second pattern and regulate, keep equal with the tidal volume of the tidal volume with first mode that make the second pattern,
Wherein, described first criterion specifically comprises:
F min ≤ 60 * V t 60 Fre * I I + E * ( 1 - T p ) ≤ F max ;
60 Fre * I I + E * ( 1 - T p ) ≥ T min insp ;
60 Fre * E I + E ≥ T min exp ;
Wherein, represent expiratory duration minima, represent inspiratory duration minima, T prepresent that breath holding time accounts for the ratio of an inspiratory phase time, F minrepresent minimum flow velocity, F maxrepresent Peak Flow Rate, V trepresent tidal volume, represent inspiratory/expiratory, Fre represents frequency.
2. the mode switching method for anesthetic machine or respirator according to claim 1, it is characterized in that, the breath holding time of described second pattern accounts for the ratio of an inspiratory phase time, inspiratory/expiratory and frequency to carry out regulating specifically comprising:
If described initial value meets described first criterion, implement the switching of first mode to the second pattern, if described initial value does not meet the first criterion, regulate the breath holding time of described second pattern to account for the ratio of an inspiratory phase time, obtain the first numerical value of described second pattern after regulating;
Adopt described first criterion to judge to described first numerical value, judge whether described first numerical value meets the first criterion;
If described first numerical value meets described first criterion, implement the switching of first mode to the second pattern, if described first numerical value does not meet the first criterion, regulate the inspiratory/expiratory of described second pattern, obtain the second value of described second pattern after regulating;
Adopt described first criterion to judge to described second value, judge whether described second value meets described first criterion;
If described second value meets described first criterion, implement the switching of first mode to the second pattern, if described second value does not meet the first criterion, regulate the frequency of described second pattern, obtain the third value of described second pattern after regulating.
3. the mode switching method for anesthetic machine or respirator according to claim 2, it is characterized in that, the ratio regulating the breath holding time of described second pattern to account for an inspiratory phase time specifically comprises:
When T min insp * F max 60 ≤ V t Time, according to V t * Fre F max ≤ I I + E * ( 1 - T p ) ≤ V t * Fre F min Calculate the excursion that described breath holding time accounts for the ratio of an inspiratory phase time;
In described excursion, the ratio that described breath holding time accounts for an inspiratory phase time is regulated.
4. the mode switching method for anesthetic machine or respirator according to claim 2, it is characterized in that, the ratio regulating the breath holding time of described second pattern to account for an inspiratory phase time specifically comprises:
When T min insp * F min 60 ≤ V t ≤ T min insp * F max 60 Time, according to T min insp * Fre 60 ≤ I I + E * ( 1 - T p ) ≤ V t * Fre F min Calculate the excursion that described breath holding time accounts for the ratio of an inspiratory phase time;
In described excursion, the ratio that described breath holding time accounts for an inspiratory phase time is regulated.
5. the mode switching method for anesthetic machine or respirator according to claim 2, is characterized in that, regulate the inspiratory/expiratory of described second pattern specifically to comprise:
When T min insp * F max 60 ≤ V t Time, according to V t * Fre F max ≤ I I + E * ( 1 - T p ) ≤ V t * Fre F min With I I + E * ( 1 - T p ) ≤ ( 1 - T p ) * ( 1 - T min exp * Fre 60 ) , Calculate the excursion of described inspiratory/expiratory;
When T min insp * F min 60 ≤ V t ≤ T min insp * F max 60 Time, according to T min insp * Fre 60 ≤ I I + E * ( 1 - T p ) ≤ V t * Fre F min With I I + E * ( 1 - T p ) ≤ ( 1 - T p ) * ( 1 - T min exp * Fre 60 ) Calculate the excursion of described inspiratory/expiratory;
In described excursion, described inspiratory/expiratory is regulated.
6. the mode switching method for anesthetic machine or respirator according to claim 5, it is characterized in that, the method calculating described inspiratory/expiratory excursion specifically comprises:
When V t * Fre F min ≤ ( 1 - T p ) * ( 1 - T min exp * Fre 60 ) Time, according to V t * Fre F max ≤ I I + E * ( 1 - T p ) ≤ V t * Fre F min Calculate the excursion of described inspiratory/expiratory;
When V t * Fre F min > ( 1 - T p ) * ( 1 - T min exp * Fre 60 ) , According to V t * Fre F max ≤ I I + E * ( 1 - T p ) ≤ ( 1 - T p ) * ( 1 - T min exp * Fre 60 ) Calculate the excursion of described inspiratory/expiratory;
When V t * Fre F min ≤ ( 1 - T p ) * ( 1 - T min exp * Fre 60 ) Time, according to T min insp * Fre 60 ≤ I I + E * ( 1 - T p ) ≤ V t * Fre F min Calculate the excursion of described inspiratory/expiratory;
When V t * Fre F min > ( 1 - T p ) * ( 1 - T min exp * Fre 60 ) , According to T min insp * Fre 60 ≤ I I + E * ( 1 - T p ) ≤ ( 1 - T p ) * ( 1 - T min exp * Fre 60 ) Calculate the excursion of described inspiratory/expiratory.
7. the mode switching method for anesthetic machine or respirator according to claim 2, is characterized in that, regulate the frequency of described second pattern specifically to comprise:
When T min insp * F max 60 ≤ V t Time, according to V t * Fre F max ≤ I I + E * ( 1 - T p ) ≤ V t * Fre F min With I I + E * ( 1 - T p ) ≤ ( 1 - T p ) * ( 1 - T min exp * Fre 60 ) , Calculate the excursion of described frequency;
When T min insp * F min 60 ≤ V t ≤ T min insp * F max 60 Time, according to T min insp * Fre 60 ≤ I I + E * ( 1 - T p ) ≤ V t * Fre F min With I I + E * ( 1 - T p ) ≤ ( 1 - T p ) * ( 1 - T min exp * Fre 60 ) Calculate the excursion of described frequency;
In described excursion, described frequency is regulated.
8. the mode switching method for anesthetic machine or respirator according to claim 7, it is characterized in that, the method calculating the excursion of described frequency specifically comprises:
When V t * Fre F min ≤ ( 1 - T p ) * ( 1 - T min exp * Fre 60 ) Time, according to I I + E * ( 1 - T p ) * F min V t ≤ Fre ≤ I I + E * ( 1 - T p ) * F max V t Calculate the excursion of described frequency;
When V t * Fre F min > ( 1 - T p ) * ( 1 - T min exp * Fre 60 ) Time, according to ( 1 - I I + E ) * 60 T min exp ≤ Fre ≤ I I + E * ( 1 - T p ) * F max V t Calculate the excursion of described frequency;
When V t * Fre F min ≤ ( 1 - T p ) * ( 1 - T min exp * Fre 60 ) Time, according to I I + E * ( 1 - T p ) * F min V t ≤ Fre ≤ I I + E * ( 1 - T p ) * 60 T min insp Calculate the excursion of described frequency;
When V t * Fre F min > ( 1 - T p ) * ( 1 - T min exp * Fre 60 ) , According to ( 1 - I I + E ) * 60 T min exp ≤ Fre ≤ I I + E * ( 1 - T p ) * 60 T min insp Calculate the excursion of described frequency.
9. the mode switching method for anesthetic machine or respirator according to claim 2, it is characterized in that, the breath holding time of described second pattern accounts for the ratio of an inspiratory phase time, inspiratory/expiratory and frequency to carry out regulating also comprising:
Adopt the first criterion to judge to third value, judge whether described third value meets described first criterion;
If described third value meets described first criterion, implement the switching of first mode to the second pattern, if described third value does not meet the first criterion, exit all adjustments.
CN200910235638.2A 2009-09-30 2009-09-30 Mode switching method for anaesthesia machine or breathing machine Expired - Fee Related CN102028997B (en)

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