CN105286868A - Intelligent lead switching method and device based on respiration parameters - Google Patents
Intelligent lead switching method and device based on respiration parameters Download PDFInfo
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Abstract
The invention provides an intelligent lead switching method and device based on respiration parameters. The intelligent lead switching method comprises the following steps: S1, acquiring a respiration signal according to an acquired physiologic signal; S2, judging whether the quality of a signal corresponding to the respiration signal meets the lead switching condition, if yes, turning to S3 and if no, turning to S4; S3, triggering a lead switching command; and S4, keeping the present lead, wherein in S1, an electrocardio lead line acquires the respiration signal by one channel at the same moment. The intelligent lead switching method and device based on respiration parameters can effectively improve the respiratory coefficient calculation accuracy, and meanwhile, can reduce respiration-related false alarms, and ensure that the overall performance of a monitor which utilizes the impedance method to measure the respiration parameters is effectively improved.
Description
Technical field
The present invention relates to processing of biomedical signals field, particularly relate to a kind of intelligence based on respiration parameter lead switch method and device.
Background technology
At present, when utilizing impedance method to measure respiration parameter in the monitor sold on the market, all need first to arrange the mode measured and lead manually, and then measure, like this once after selected leading, unless next time, artificial change was led, otherwise this will be adopted fixedly to lead measure always, but at some in particular cases, such as selected lead signals is subject to larger interference when causing waveform quality poor, the mistake in computation of breathing rate and some physiology of false triggering or technology just may be caused to report to the police, puzzlement is brought to medical personnel and patient, under some significantly disturb, signal also may be caused to cross the border, exceed screen display scope, simultaneously when patient adopts different breathing patterns or respiratory intensity is different, causing in some cases, real breath signal amplitude is less, if such as patient adopts ventral breathing, if then now select I to lead leading as respiration measurement, then the thoracic cavity fluctuations of patient is less, I leads the breath signal amplitude measured may be very faint, very likely the false alarm that suffocates can be triggered, clinically, if especially night patient cause after entering sleep state certain selected lead on breath signal comparatively faint, bring very large puzzlement and inconvenience then can to patient and medical personnel.
Summary of the invention
Technical problem to be solved by this invention needs to provide one can effectively reduce amount of calculation, avoids signal disturbing, saves hardware corridor and cost, and improve the accuracy of breathing rate calculating, to lead with the intelligence based on respiration parameter of breathing relevant the false alarm method and device that switch can also be reduced simultaneously, make to utilize the monitor overall performance of impedance method measurement respiration parameter to get a promotion.
To this, the invention provides a kind of intelligence based on respiration parameter lead switch method, comprise the following steps:
Step S1, obtains breath signal according to the physiological signal collected;
Step S2, judges whether the signal quality that described breath signal is corresponding meets the switching condition that leads, if then jump to step S3, then jumps to step S4 if not;
Step S3, triggers the switching command that leads;
And step S4, keeps current leading;
In described step S1, under synchronization, described cardiac diagnosis lead-line obtains breath signal by a passage.
Further, in described step S3, trigger and lead after switching command, between to be switched leading, change carrier system, and leading of selecting to match with current carrier mode is led as breathing calculating.
Further, described step S1 comprises following sub-step:
Step S101, obtains breath signal according to the physiological signal collected;
Step S102, analyzes the breath signal got, carries out the gain process of self adaptation multiple according to the amplitude size of described breath signal.
Further, described step S102 can also comprise following sub-step:
Step S1021, by arranging the first amplitude threshold values and described breath signal is divided into three regions by the second amplitude threshold values, wherein, described first amplitude threshold values is greater than the second amplitude threshold values;
And step S1022, judges its regional location be according to the amplitude size of described breath signal, and then the multiple selecting this breath signal region corresponding carries out adaptive gain process.
Further, in described step S2, disturbance ecology is carried out to the signal after gain process, then according to the result of disturbance ecology, signal quality is judged, the evaluation result of quality of output signals, and switching mark position of leading is set according to evaluation result; Wherein, the interference in described disturbance ecology comprises one or more in drift interference, action interference, myoelectricity interference and Hz noise.When described switching mark position of leading is true time, trigger the switching command that leads.
Further, described step S2 judges the grade of described signal quality by the result of disturbance ecology, and sends corresponding control instruction according to the grade of described signal quality; When the result of disturbance ecology is the action interference that there is all interference or existence exception, switching mark of leading described in arranging position is true; When the result of disturbance ecology is for existing two or more interference or there is action interference, wait for until scheduled time internal interference duration exceedes detection duration, then switching mark of leading described in arranging position is true; When the result of disturbance ecology is when there is any one interference in drift interference, myoelectricity interference and Hz noise, wait for that switching mark of leading described in then arranging position is true until occur that scheduled time internal interference duration exceedes setting more than the multiple N of detection duration, current breathing rate is compared with history breathing rate to there is larger saltus step and frequent any one situation triggered in the warning relevant with breathing in detection duration; Described setting multiple N be greater than 1 natural number.
Further, the cardiac diagnosis lead electrode of described cardiac diagnosis lead-line comprises electrode RA, electrode LL and electrode LA, corresponding use I to lead and II leads and obtains breath signal to respiration parameter collection, when same, inscribe the measurement that passage that the passage that led by I or II led carries out respiration parameter.
Further, in described step S3, lead described in being received by hardware mode after switching command, between electrode LA and electrode LL, automatically change carrier system.
The present invention also provides a kind of intelligence based on respiration parameter to lead the device switched, and have employed and to lead the method switched based on the intelligence of respiration parameter as above, and comprise:
Front end breath signal acquisition module, for obtaining breath signal according to the physiological signal collected;
Judging to lead switching condition module, for judging whether the signal quality that described breath signal is corresponding meets the switching condition that leads, and switching mark position of leading being set according to judged result;
And switching control module of leading, for receiving and responding the switching command that leads.
Further, also comprise adaptive gain processing module, the breath signal that described adaptive gain processing module gets for analyzing described front end breath signal acquisition module, and the gain process of self adaptation multiple is carried out according to the amplitude size of described breath signal; Described judgement lead switching condition module judge gain process after signal quality whether meet the switching condition that leads.
Further, described leading switches the lead switching mark position of control module by the switching command that leads described in hardware acceptance, then switch lead between automatically change carrier system, and leading of selecting to match with current carrier mode is led as breathing calculating.
Compared with prior art, beneficial effect of the present invention is: the collection being different from physiological ecg signal, described cardiac diagnosis lead-line is inscribed and is only carried out acquisition breath signal by a passage when same, decrease operand, can avoid realizing electrode LL simultaneously, the carrier system of electrode LA and electrode RA and the huge amount of calculation brought and signal disturbing, and after the switching command that leads described in being received by hardware mode, automatically carrier system is changed between electrode LA and electrode LL, when the signal quality of energy automatically on certain electrode is bad, switch, avoid the inconvenience manually switched, save hardware corridor and cost simultaneously.
The breathing rate mistake in computation brought when the present invention can effectively avoid the single breath signal led to be interfered so that waveform quality is poor or some in particular cases causes the breath signal that collects more weak or other false alarm situations, when the single signal quality led is poor, the present invention can calculate by the good leads of adaptively selected wherein signal quality, the accuracy that breathing rate calculates can be improved like this, reduce simultaneously and breathe relevant false alarm probability; On this basis, the present invention selects the multiple of gain according to the amplitude size adaptation of the breath signal collected, and then can be good at making breath signal remain on some benchmark, avoid because signal amplitude is excessive, drift out-of-bounds or the too small and drawbacks such as false alarm that cause suffocating of signal amplitude, this makes it possible to the waveform and the parameter that are more conducive to observation and analysis breath signal, the monitor overall performance utilizing impedance method to measure respiration parameter is greatly improved, improves intelligentized design and the human oriented design of product.
Accompanying drawing explanation
Fig. 1 is the workflow schematic diagram of an embodiment of the present invention;
Fig. 2 is the workflow schematic diagram of the another kind of embodiment of the present invention;
Fig. 3 is the system structure schematic diagram of another embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, preferably embodiment of the present invention is described in further detail:
Embodiment 1:
As shown in Figure 1, a kind of method that this example provides intelligence based on respiration parameter to lead switching, comprises the following steps:
Step S1, obtains breath signal according to the physiological signal collected;
Step S2, judges whether the signal quality that described breath signal is corresponding meets the switching condition that leads, if then jump to step S3, then jumps to step S4 if not;
Step S3, triggers the switching command that leads;
And step S4, keeps current leading;
In described step S1, under synchronization, described cardiac diagnosis lead-line obtains breath signal by a passage.
In this routine described step S1, breath signal realizes obtaining preferably by cardiac diagnosis lead-line, then measured by impedance method, through monitor internal hardware carrier processing, the breath signal reacting torso model impedance variation can be obtained, utilize this breath signal just can the analysis and calculation alarm decision relevant to breathing rate afterwards; When impedance method measures breath signal, the cardiac diagnosis lead electrode being connected to human body is electrode RA, electrode LL and electrode LA.It is worth mentioning that, this example is different from the collection of physiological ecg signal, namely use multiple lead to respiration parameter carry out measurement obtain, as adopt I lead and II lead to respiration parameter carry out measurements acquisition, inscribe when same and also only have a passage led to carry out gathering to obtain breath signal, the channel acquisition that such as I leads or the passage that II leads carry out collection breath signal, and then decrease operand, it also avoid and need to realize carrier system that difference leads and the amount of calculation brought and signal disturbing simultaneously; Described leading is exactly connecting mode between a kind of wire.
In this routine described step S3, trigger and lead after switching command, between to be switched leading, change carrier system, and leading of selecting to match with current carrier mode is led as breathing calculating; Described step S3 preferably includes following sub-step:
Step S301, according to being switching mark position of really leading, to receive and triggering is led switching command;
And, step S302, according to the switching command that leads received, change carrier system, and leading of selecting to match with current carrier mode is led as breathing calculating.Wherein, to lead switching command described in described step S302 receives preferably by hardware mode, then switch lead between automatically change carrier system.
The cardiac diagnosis lead electrode of this routine described cardiac diagnosis lead-line comprises electrode RA, electrode LL and electrode LA, corresponding use I to lead and II leads and obtains breath signal to respiration parameter collection, when same, inscribe the measurement that passage that the passage that led by I or II led carries out respiration parameter; In described step S3, lead described in being received by hardware mode after switching command, between electrode LA and electrode LL, automatically change carrier system.That is, this example switches the condition of leading and comprises the switching command that leads that software sends, and hardware acceptance to described in lead after switching command automatically change carrier system between electrode LA and electrode LL.
This routine described step S301, according to being switching mark position of really leading, receives and to lead switching command, when receive lead switching command time, can switch between I leads and II leads; And send a switching mark position of leading to hardware by software, the switching needing hardware to coordinate to lead between I leads and II leads.
Described step S302 is according to the switching command that leads received in above-mentioned steps, change carrier system, after hardware acceptance to above-mentioned switching mark position of leading, the carrier system of applying can be changed between I leads and II leads, also namely between electrode LA and electrode LL, change carrier system, and leading of selecting to match with current carrier mode is led as breathing calculating.Herein, be different from electrocardiosignal to switch the place of leading and be: simultaneously electrocardio gathers multiple data of leading, when calculate lead of poor quality time, data with regard to using another one to lead calculate, but during the respiration measurement of this example, because two carrier signals that current impedance method applies can only collect data of leading during same moment, if when judging that poor signal quality wants switching to lead, the carrier system that must be applied by change, software and hardware coordinates switching to gather and calculating is led.And whether electrocardio no matter leads to switch, always other data of leading are gathering, and exists always.So from technology realization, there is the difference of essence in both, therefore the breathing intelligence of this example changing method that leads is necessary clinically, what breathing rate can be made to calculate is more accurate, the respiratory wave of interface display advantageously in observation, and reduces the relevant false alarm brought by signal quality.
Namely, this example only changes carrier system between electrode LL and electrode LA two passages, when the signal quality of energy automatically on certain electrode is bad, switch, avoid the inconvenience manually switched, save hardware corridor and cost simultaneously, especially switch with cardiac diagnosis lead and compare, synchronization only can gather the signal of the passage that leads and carry out the calculating of respiration parameter, decrease operand, it also avoid the carrier system simultaneously realizing electrode LL, electrode LA and electrode RA and the amount of calculation brought and signal disturbing.
It should be noted that, in prior art, switch the mode of leading manually switch in addition and change the carrier system of three electrodes, but manually switching the quality being engraved in respirator device side observation signal quality when can allow medical personnel takes switching to lead, and has certain inconvenience; Three electrode channels change carrier signal simultaneously, can increase by a road namely: the carrier system also changing electrode RA, but this kind of mode can require three crosslinking electrodes acquired signal simultaneously, increases the cost of hardware to a great extent and realizes difficulty; And in the Practical Calculation of respiration parameter, only need a circuit-switched data to carry out calculating respiration parameter, therefore this prior art causes unnecessary amount of calculation.
On this basis, this routine described step S1 comprises following sub-step:
Step S101, obtains breath signal according to the physiological signal collected;
Step S102, analyzes the breath signal got, carries out the gain process of self adaptation multiple according to the amplitude size of described breath signal.
The described intelligence based on respiration parameter of this example method switched of leading realizes on host computer, host computer is obtained by cardiac diagnosis lead-line and gathers breath signal, the gain that this routine described breath signal needs to carry out hardware before entering breathing algorithm is amplified, mainly according to the amplitude size of the breath signal collected, adaptive gain amplification is carried out to it, again Quality estimation is carried out to the signal after amplification, then determine whether using current leading to calculate according to the judged result of signal quality, if signal quality is good, then keep current leading, otherwise, then be switched to another one to lead, the signal collected finally is utilized to carry out the calculating of breathing rate and the judgement of relative alarm, its workflow schematic diagram as shown in Figure 1.
In this routine described step S102, the amplitude size of the breath signal collected is judged, different gain amplification process is carried out according to the scope of different amplitude sizes, it is worth mentioning that, gain process described in this example is not limited to the gain factor fixed, and what adopt is the gain process of self adaptation multiple.
In this routine described step S2, disturbance ecology is carried out to the signal after gain process, then according to the result of disturbance ecology, comprehensive descision is carried out to signal quality, the evaluation result of quality of output signals, and switching mark position of leading is set according to evaluation result; Wherein, the interference in described disturbance ecology comprises one or more in drift interference, action interference, myoelectricity interference and Hz noise.
Described step S2 judges above-mentioned signal quality after gain process, and arranges according to the judged result of signal quality switching mark position of leading; Utilize the breath signal of current acquisition to carry out a series of disturbance ecology judgement, the interference that can identify comprises drift interference, action interference, myoelectricity interference and Hz noise; The judgement of described action interference is judged by the saltus step of the amplitude size of breath signal and the mixed and disorderly degree of waveform, described myoelectricity interference is judged by the extreme's distribution situation calculated in a period of time, described drift interference is then judged by the saltus step of the amplitude size of breath signal and the degree that departs from baseline, the radiation interference that described Hz noise brings for electromagnetic wave; This example, according to final disturbance ecology result, carries out comprehensive descision to signal quality, provides the evaluation result of signal quality quality, arranges according to judged result switching mark position of leading.
In described step S2, if there is not interference or there is low-grade interference in the signal after described gain process, then, setting switching mark position of leading is false, jump to described step S4 to keep current leading, and carry out breathing relevant calculating and alarm decision to current lower the collected breath signal that leads; Otherwise switching mark of leading position is set to very, jump to described step S3; Described low-grade drift interference, refer to for non-interference signal, sudden change amplitude is little, be not enough to the drift interference affecting judged result, namely described low-grade drift disturbs the saltus step referring to the amplitude size of breath signal and the degree departing from baseline to be not enough to impact judgement, this concrete numerical value can be arranged accordingly according to different equipment and demand, as arranged drift value lower than 1.5 times, 2 times or other suitable multiples.
The switching condition that leads is not met when signal quality is better, namely when the result of disturbance ecology shows that the current signal quality led is better, namely now there is not the interference of above-mentioned any one in signal or some low-grade drifts of the appearance of short time are disturbed, the drift interference that breath signal is too many is exceeded as do not existed in the scope in a few second, switching mark of now leading position is false, do not meet the switching condition that leads, keep existing leading, directly carry out breathing relevant calculating and alarm decision to the breath signal collected under current leading.
The switching condition that leads is met when signal quality is poor, namely when the result of disturbance ecology shows that the current signal quality led is poor, namely there is comparatively serious action interference, or continue the myoelectricity of one period of long period or drift and the breathing rate of current calculating and Historic preservation breathing rate difference larger time, switching mark of leading position is true, now meet the condition of leading and switching, now switch to another kind to lead, the breath signal that collects under the leading after switching is returned to step S2 and carries out subsequent treatment and judgement; The reference of long period mentioned here detects duration, and such as, detecting duration is 1 second, then more than 1 minute or 2 minutes or other suitable time spans be then the long period, this standard can be arranged accordingly according to different equipment and demand.
Embodiment 2:
As shown in Figure 2, with upper embodiment 1 unlike, this routine described step S102 can also comprise following sub-step:
Step S1021, by arranging the first amplitude threshold values and described breath signal is divided into three regions by the second amplitude threshold values, wherein, described first amplitude threshold values is greater than the second amplitude threshold values;
And step S1022, judges its regional location be according to the amplitude size of described breath signal, and then the multiple selecting this breath signal region corresponding carries out adaptive gain process.
This routine described step S1021 comprises following sub-step:
Step S10211, by arranging the first amplitude threshold values and described breath signal is divided into three regions by the second amplitude threshold values, described three regions be amplitude size successively decrease successively first area, second area and the 3rd region;
And step S10212, arranges described trizonal multiple respectively, described trizonal multiple is respectively the first multiple, the second multiple and the triple that increase progressively successively.
Described step S2 judges the grade of described signal quality by the result of disturbance ecology, and sends corresponding control instruction according to the grade of described signal quality; When the result of disturbance ecology is the action interference that there is all interference or existence exception, switching mark of leading described in unconditionally arranging position is true; When the result of disturbance ecology is for existing two or more interference or there is action interference, wait for until scheduled time internal interference duration exceedes detection duration, then switching mark of leading described in arranging position is true; When the result of disturbance ecology is when there is any one interference in drift interference, myoelectricity interference and Hz noise, wait for that switching mark of leading described in then arranging position is true until occur that scheduled time internal interference duration exceedes setting more than the multiple N of detection duration, current breathing rate is compared with history breathing rate to there is larger saltus step and frequent any one situation triggered in the warning relevant with breathing in detection duration; Described setting multiple N be greater than 1 natural number.The described scheduled time can carry out self-defined setting according to practical situation, and this example preferably detects duration.
More specifically, this routine described step S1022 comprises following sub-step:
Step S10221, judges whether the amplitude size of described breath signal is greater than the first amplitude threshold values, if then carry out gain process by the first multiple that first area is corresponding, otherwise jumps to step S10222;
Step S10222, judges whether the amplitude size of described breath signal is less than the second amplitude threshold values, if then carry out gain process by the triple that the 3rd region is corresponding, otherwise jumps to step S10223;
And, step S10223, second multiple corresponding by second area carries out gain process;
Wherein, this routine described step S1022 performs successively with the order of described step S10221, step S10222 and step S10223, or performs successively with the order of described step S10222, step S10221 and step S10223; Namely the execution sequence between described step S10221 and step S10222 can change.
Namely this example is by judging the amplitude size of the breath signal that described step S1 collects, the amplitude size of breath signal is divided into three regions, the breath signal that amplitude size is greater than the first amplitude threshold values is first area, this the first amplitude threshold values is amplitude peak threshold values, when the amplitude size of breath signal is too large to such an extent as to reach the degree that can trigger interference and report to the police, so, just think that this breath signal is first area, the decision threshold of its correspondence is the first amplitude threshold values, namely the first amplitude threshold values is disturb a self-defined threshold values of reporting to the police as reference frame, described first amplitude threshold values is slightly less than the threshold values that interference is reported to the police, according to different equipment and demand, the first different amplitude threshold values can be set.The breath signal that amplitude size is less than the second amplitude threshold values is the 3rd region, described second amplitude threshold values is minimum threshold magnitude, when the amplitude size of breath signal is too little to such an extent as to reach the degree that can trigger and suffocate and report to the police, so, just think that this breath signal is the 3rd region, the decision threshold of its correspondence is the second amplitude threshold values, namely the second amplitude threshold values is the self-defined threshold values of reporting to the police as reference frame that suffocates, described second amplitude threshold values, slightly larger than the threshold values of reporting to the police that suffocates, can arrange the second different amplitude threshold values according to different equipment and demand.And the amplitude size breath signal be between the first amplitude threshold values and the second amplitude threshold values is second area, this second area is also the most frequently used region, be the effective coverage being conducive to analyzing and judging, the respiration parameter of normal population generally all drops in this second area.
The object that this example carries out zoning to breath signal makes to carry out after preliminary judgement to the amplitude size of breath signal, the signal being in zones of different to the amplitude size of breath signal carries out the adjustment of different gains multiple, amplitude in excessive and the 3rd region of amplitude in first area can be avoided too small and interference that is that bring follow-up calculating.
In specific implementation process, suppose that described step S1021 obtains the amplitude A of breath signal x (n) collected, a first amplitude threshold values Tmax and the second amplitude threshold values Tmin that be placed through of threshold value is divided into three regions whole data segment, the first area being wherein greater than Tmax is defined as Rmax, the 3rd region being less than Tmin is defined as Rmin, and the second area be between the two is defined as Rmid.
Judge whether amplitude A is greater than the first amplitude threshold values Tmax of setting; When judging that the signal amplitude of above-mentioned acquisition is greater than the first amplitude threshold values Tmax, the first less multiple that breath signal is now fixed is amplified; Described the first less multiple refers to for the second multiple and triple less, with the breath signal amplitude size of second area as a reference, by the processing and amplifying of the first multiple, make the breath signal amplitude size of this first area as far as possible close with the breath signal amplitude size of second area; Because in actual applications.What the amplitude size of breath signal was conventional is second area, if the amplitude size of breath signal is in first area, the amplitude size that breath signal now is then described is excessive, abnormal and may out-of-bounds, now just directly uses a smaller gain to ensure respiration signal not out-of-bounds.
This example does not need to carry out segmenting different gains corresponding to different amplitude size in this first area, makes the amplitude size of its breath signal as far as possible near the breath signal amplitude size of second area by fixing first multiple.The reason of such setting is, because breath signal now self amplitude is excessive, signal may also have little significance to specifically segmenting different gains again in distortion, as long as ensure signal not out-of-bounds, this is highly beneficial clinically observes waveform with medical personnel, because if do not adopt this process, the probably stretching line of breath signal meeting out-of-bounds, such breath signal clinically for medical personnel without any meaning, but also likely can triggering signal interference report to the police, and this signal disturbing is reported to the police without any physiological meaning, as retribution brings puzzlement can on the contrary too much medical personnel and patient, this example can well avoid above-mentioned this drawback by such process.
Judge whether amplitude A is less than the second amplitude threshold Tmin of setting, if the amplitude A of breath signal is less than the second amplitude threshold Tmin, now breath signal is in the 3rd region, now gain is set to the larger triple fixed, unlikely too weak and cause being inconvenient to observe the risk even having and cause the false alarm that suffocates with the amplitude size of the signal that ensures respiration, the judgement of reporting to the police because suffocate decides according to the base resistance of breath signal and the size of variable resistance, finally embodying is exactly the amplitude of breath signal, by judging whether the amplitude size of breath signal is less than some threshold values to provide the warning that suffocates, described less triple refers to for the first multiple and the second multiple less, with the breath signal amplitude size of second area as a reference, by the processing and amplifying of triple, make the breath signal amplitude size in the 3rd region as far as possible close with the breath signal amplitude size of second area.
When whether amplitude A is less than the second amplitude threshold Tmin of setting, after the gain of the triple of larger multiple, if suffocate, the amplitude of the whole segment signal of signal itself is closely baseline, even if all remain in same level so rear full segment data is amplified in gain, still correctly can identify and suffocate; But the amplitude of whole segment data still can be different, now this kind can be avoided to suffocate false alarm by improving gain amplifier multiple, when breathing comparatively slight when especially night, patient fell asleep, this type of false alarm brings too many puzzlement can to medical personnel and patient, and this example by such process can't cause real suffocate fail to report, for this comparatively serious high-grade warning, if can quote more accurately, there is very important meaning clinically.
If the amplitude A of breath signal is between the first amplitude threshold values Tmax and the second amplitude threshold Tmin, namely when the amplitude A of breath signal is less than the first amplitude threshold values Tmax and when being greater than the second amplitude threshold Tmin, different gain factor is selected to breath signal now, i.e. the second multiple.
The amplitude size of the breath signal of this second area is the region that the most often occurs of breath signal under normal circumstances, therefore can select different gain factor according to the actual size of breath signal in the second area, namely selects the second different multiples; Now the value of the second multiple representative is not single value, but a linearity curve changed along with breath signal self amplitude difference, it is larger that the signal that amplitude is too little is amplified to amplitude by this linearity curve, and it is smaller that the signal that amplitude is too large is amplified to amplitude; Namely the amplitude A of breath signal own is larger, second multiple is less, and when the amplitude A of breath signal own is less, second multiple improves relatively, through suitable gain factor, the breath signal being in second area can be made after different gain factor can be amplified to the range value that is beneficial to clinical observation.
It is worth mentioning that, as mentioned above, the present embodiment is at the second multiple of second area, what adopt is the process carrying out adaptive gain for the breath signal collected, second multiple of adaptive gain is not here a fixing value, but according to the amplitude size of different breath signals and the value automatically regulated, the degree regulated is arranged according to practical situation and demand, and then the breath signal guaranteeing to make to be in second area can be amplified to the range value that is beneficial to clinical observation after different gain factor.
Corresponding, this routine described step S2 comprises following sub-step:
Step S201, judges the grade of described signal quality by the result of disturbance ecology;
And step S202, sends corresponding control instruction according to the grade of described signal quality.
This routine described step S201 comprises following sub-step:
Step S2011, judge whether the result of disturbance ecology exists all interference in drift interference, action interference, myoelectricity interference and Hz noise, or judge whether the result of disturbance ecology exists abnormal action interference, if the grade then defining described signal quality is grade H, otherwise jumps to step S2012;
Step S2012, judge whether the result of disturbance ecology exists the two or more interference in drift interference, action interference, myoelectricity interference and Hz noise, or judge whether the result of disturbance ecology exists action interference, if the grade then defining described signal quality is grade M, otherwise jumps to step S2013;
Step S2013, judges whether the result of disturbance ecology exists any one interference in drift interference, myoelectricity interference and Hz noise, if the grade then defining described signal quality is grade L, otherwise jumps to step S2014;
And step S2014, the rank defining described signal quality is grade G.
This routine described step S202 comprises following sub-step:
Step S2021, when the tier definition of described signal quality is grade H, switching mark of leading described in unconditionally arranging position is true, triggers the switching command that leads;
Step S2022, when the tier definition of described signal quality is grade M, if the interference duration that there is grade M in the given time exceedes detection duration, then switching mark of leading described in arranging position is true, triggers the switching command that leads;
Step S2023, when the tier definition of described signal quality is grade L, in the given time, if the interference duration that there is grade L exceedes detection duration, then carry out following judgement and process further: if current breathing rate is compared with history breathing rate, there is larger saltus step or frequently trigger in detection duration and breathe relevant warning, then switching mark of leading described in arranging position is true, triggers the switching command that leads; If the interference duration that there is grade L is greater than detect setting more than the multiple N of duration, then switching mark position of leading described in arranging is true, triggers the switching command that leads, described setting multiple N be greater than 1 natural number.
And step S2024, when the tier definition of described signal quality is grade G, jumps to step S4.
This routine described step S2 be used for above-mentioned carry out Gain tuning after signal quality judge, to determine whether there is the interference meeting switching condition; In described step S201, to above-mentioned carry out Gain tuning after signal quality judge, see whether it exists interference, and judge interference strength and interference type, same, the interference type existed in breath signal comprises drift interference, myoelectricity interference, action interference and Hz noise etc., and such as described action interference is that patient gets up to lie down, stand up and leave the bed to walk about etc. and causes clinically mostly, is judged by the saltus step of the amplitude size of breath signal and the mixed and disorderly degree of waveform; Described myoelectricity interference is the extreme's distribution situation by calculating in a period of time, and this period of time can self-definedly be arranged; Described drift interference is then judged by the saltus step of the amplitude size of breath signal and the degree that departs from baseline, then utilizes above-mentioned determination methods, provides the judged result that whether there is interference.
If there is above-mentioned all interference or there is comparatively serious action interference simultaneously, comparatively serious action interference refers to that amplitude saltus step in the short time is comparatively large and waveform is mixed and disorderly, cannot tell normal respiratory wave, then now the signal quality of breath signal can be classified as the poorest grade H; If there is two or more described interference, then signal quality is now divided into poor grade M; If the wherein a kind of interference of just simple existence except action interference, then now signal quality is divided into the grade L of low difference; If above-mentioned interference does not exist, then think that now signal quality is better, orientates grade G as.
In step S2, if signal quality is poor, then according to signal quality divided rank result, and the difference size of the lasting duration of interference and current breathing rate and history breathing rate can be combined, the value of switching mark position of leading is set; When leading, flag bit is true time, and switching is led; It is specific as follows: if now signal quality grade is the poorest grade H, switching mark position of then now leading can unconditionally be set to very, lead and can very fast-response be switched to another from current leading and lead, ropy breath signal now can be avoided preferably to enter into the calculating of breathing rate and then avoid the drawback of breathing rate mistake in computation and a series of false alarm of false triggering.
When signal quality is grade M, judge in the scheduled time, the described scheduled time refers to detection duration, and as 1 second, the interference duration that there is grade M exceeded detection duration, then switching mark position of now leading can be set to very, now can carry out switching of leading.
When signal quality is grade L, first judge in the scheduled time, the described scheduled time refers to detection duration, as 1 second, if the interference duration that there is grade L exceedes detection duration, we can divide following situation to judge again, and whether rear decision switches leads: 1, current breathing rate is compared with history breathing rate, if there is larger saltus step or during this period of time frequently trigger and breathe relevant warning, as saltus step more than 10 percentage points or frequency occur abnormal, then switching mark of leading position is true; Although 2, current breathing rate does not have larger saltus step and any warning of triggerless compared with history breathing rate, but there is grade L disturbs duration to be far longer than detection duration, as being greater than setting multiple N or more, described setting multiple N can self-definedly be arranged, for abnormal reaction situation, as 1 minute or 2 minutes etc., but do not limit to and these numerical value, then switching mark position of now leading also can be set to very; This example the 2nd kind of switching condition that why can arrange described in grade L is the drift interference of existence and true breathing rate fixed frequency closely in breath signal, such setting, just can switch by leading and eliminate such interference effect.
It is worth mentioning that, the process of above-mentioned steps can come more reasonably to switch to lead according to unlike signal credit rating preferably, can ensure when the non-constant of signal quality, namely unconditionally realize leading switching when grade H to respond faster, reduce time and the probability of breathing rate mistake in computation clinically and false alarm; And for the interference of accidental lower grade, namely can not switch at once when grade M and lead, because it is still more common to produce this interference in practical clinical, so now in order to ensure the stability of machine, this example, by the signal quality judged result of certain time length, better can ensure the stability of machine; And when breath signal only exists a certain single interference, namely when grade L, this example also can in conjunction with history value and an absolute sense duration except the Quality estimation of lasting certain time length, the object of above-mentioned process is, in order to ensure, the sensitive switching infrastructure of machine under interference also keeps good stability, so more meets application clinically.
Embodiment 3:
As shown in Figure 3, this example also provides a kind of intelligence based on respiration parameter to lead the device switched, and the intelligence based on respiration parameter that have employed as described in embodiment 1 or embodiment 2 is led the method switched, and comprises:
Front end breath signal acquisition module 1, for gathering breath signal by cardiac diagnosis lead-line;
Adaptive gain processing module 2, for analyzing the breath signal collected, and carries out the gain process of self adaptation multiple according to the amplitude size of described breath signal;
Judging to lead switching condition module 3, for judging whether the signal quality after gain process meets the switching condition that leads, and switching mark position of leading being set according to judged result;
And, lead and switch control module 4, for receiving and responding the switching command that leads.
Lead described in this example and switch control module 4 by the switching mark position of leading of the switching command that leads described in hardware acceptance, then switch lead between automatically change carrier system, and leading of selecting to match with current carrier mode is led as breathing calculating.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. to lead the method switched based on the intelligence of respiration parameter, it is characterized in that, comprise the following steps:
Step S1, obtains breath signal according to the physiological signal collected;
Step S2, judges whether the signal quality that described breath signal is corresponding meets the switching condition that leads, if then jump to step S3, then jumps to step S4 if not;
Step S3, triggers the switching command that leads;
And step S4, keeps current leading;
In described step S1, under synchronization, described cardiac diagnosis lead-line obtains breath signal by a passage.
2. the intelligence based on respiration parameter according to claim 1 lead switch method, it is characterized in that, in described step S3, after triggering the switching command that leads, between to be switched leading, change carrier system, and leading of selecting to match with current carrier mode is led as breathing calculating.
3. the intelligence based on respiration parameter according to claim 1 and 2 lead switch method, it is characterized in that, described step S1 comprises following sub-step:
Step S101, obtains breath signal according to the physiological signal collected;
Step S102, analyzes the breath signal got, carries out the gain process of self adaptation multiple according to the amplitude size of described breath signal.
4. the intelligence based on respiration parameter according to claim 3 lead switch method, it is characterized in that, described step S102 can also comprise following sub-step:
Step S1021, by arranging the first amplitude threshold values and described breath signal is divided into three regions by the second amplitude threshold values, wherein, described first amplitude threshold values is greater than the second amplitude threshold values;
And step S1022, judges its regional location be according to the amplitude size of described breath signal, and then the multiple selecting this breath signal region corresponding carries out adaptive gain process.
5. the intelligence based on respiration parameter according to claim 3 lead switch method, it is characterized in that, in described step S2, disturbance ecology is carried out to the signal after gain process, then according to the result of disturbance ecology, signal quality is judged, the evaluation result of quality of output signals, and switching mark position of leading is set according to evaluation result; Wherein, the interference in described disturbance ecology comprises one or more in drift interference, action interference, myoelectricity interference and Hz noise.
6. the intelligence based on respiration parameter according to claim 5 lead switch method, it is characterized in that, described step S2 judges the grade of described signal quality by the result of disturbance ecology, and sends corresponding control instruction according to the grade of described signal quality; When the result of disturbance ecology is the action interference that there is all interference or existence exception, switching mark of leading described in arranging position is true; When the result of disturbance ecology is for existing two or more interference or there is action interference, wait for until scheduled time internal interference duration exceedes detection duration, then switching mark of leading described in arranging position is true; When the result of disturbance ecology is when there is any one interference in drift interference, myoelectricity interference and Hz noise, wait for that switching mark of leading described in then arranging position is true until occur that scheduled time internal interference duration exceedes setting more than the multiple N of detection duration, current breathing rate is compared with history breathing rate to there is larger saltus step and frequent any one situation triggered in the warning relevant with breathing in detection duration; Described setting multiple N be greater than 1 natural number.
7. the intelligence based on respiration parameter according to claim 1 and 2 lead switch method, it is characterized in that, the cardiac diagnosis lead electrode of described cardiac diagnosis lead-line comprises electrode RA, electrode LL and electrode LA, corresponding use I to lead and II leads and obtains breath signal to respiration parameter collection, when same, inscribe the measurement that passage that the passage that led by I or II led carries out respiration parameter.
8. to lead the device switched based on the intelligence of respiration parameter, it is characterized in that, the intelligence based on respiration parameter that have employed as described in claim 1 to 7 any one is led the method switched, and comprises:
Front end breath signal acquisition module, for obtaining breath signal according to the physiological signal collected;
Judging to lead switching condition module, for judging whether the signal quality that described breath signal is corresponding meets the switching condition that leads, and switching mark position of leading being set according to judged result;
And switching control module of leading, for receiving and responding the switching command that leads.
9. the intelligence based on respiration parameter according to claim 8 lead switch device, it is characterized in that, also comprise adaptive gain processing module, the breath signal that described adaptive gain processing module gets for analyzing described front end breath signal acquisition module, and the gain process of self adaptation multiple is carried out according to the amplitude size of described breath signal; Described judgement lead switching condition module judge gain process after signal quality whether meet the switching condition that leads.
10. the intelligence based on respiration parameter according to claim 8 lead switch device, it is characterized in that, described leading switches the lead switching mark position of control module by the switching command that leads described in hardware acceptance, then switch lead between automatically change carrier system, and leading of selecting to match with current carrier mode is led as breathing calculating.
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