CN105078422B - Method and apparatus for monitoring cardiopulmonary resuscitation compression interruption time - Google Patents
Method and apparatus for monitoring cardiopulmonary resuscitation compression interruption time Download PDFInfo
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Abstract
The application discloses a method and equipment for monitoring cardio-pulmonary resuscitation pressing interruption time based on a pulse blood oxygen technology, and discloses a pulse wave processing method, which comprises the following steps: processing a detected signal, wherein the detected signal reflects the real-time pulse characteristic of a detected person; performing pulse wave identification according to the processing result; counting the pulse wave fluctuation period according to the identification result; and outputting the statistical information. The application also discloses a medical device for pulse wave processing. In the embodiment of this application, because the period to the pulse wave disappearance through the identification result to the pulse wave is makeed statistics of, and output statistical information for medical personnel can directly acquire statistical information, for among the prior art, observe the pulse wave waveform through the people's eye and judge the pulse wave, the information in the period that this application can show the pulse wave disappearance directly perceivedly can remind the doctor to pay attention to and avoid potential danger, in order to do benefit to and improve cardiopulmonary resuscitation success rate.
Description
Technical Field
The present application relates to the medical field, and in particular, to a method, an apparatus and a medical device for monitoring the interruption time of cardiopulmonary resuscitation compression.
Background
Cardiovascular disease has become the leading cause of morbidity and mortality in humans, resulting in approximately 17,000,000 deaths worldwide each year, many of which are manifested as sudden cardiac death. Sudden cardiac death has become an important killer threatening human life and the most effective and straightforward medical procedure for this situation is cardiopulmonary resuscitation (CPR). CPR creates blood flow by either increasing intrathoracic pressure (chest pumping mechanism) or by directly compressing the heart (heart pumping mechanism) to deliver oxygen to the brain and other vital organs, thereby creating temporary artificial circulation.
In situations where the patient is not recovering from spontaneous circulation, high quality chest compressions should be performed with as little interruption as possible. 2013 the american heart disease society recommends that chest compression time should not be less than 80% of the total rescue time. During chest compressions, interruptions in compressions often occur due to endotracheal intubation, replacement of the compressor, electrical defibrillation, and other procedures. Excessive interruption of chest compressions can lead to a decrease in coronary perfusion pressure, which in turn leads to a decrease in the rate of return of spontaneous circulation, which, if any, will reduce the long-term neurological prognosis. At present, no simple and easy monitoring means is available for finding and reminding a rescuer of the interruption of pressing, so that the cardio-pulmonary resuscitation quality is reduced, and the ideal rescue effect is difficult to achieve. In the chest compression process of a patient with cardiac arrest, the blood oxygen monitoring displays a blood flow pulse waveform caused by compression, and the blood flow pulse waveform disappears immediately if the compression is interrupted. Conventional blood oxygen monitoring generally can only show pulse wave form, need to judge through human eye observation pulse wave form, can't directly carry out the early warning to pressing down the interrupt time.
Disclosure of Invention
The application provides a pulse wave processing method and device and medical equipment.
According to a first aspect of the present application, there is provided a method of monitoring the time to interruption of cardiopulmonary resuscitation compression, comprising:
processing a detected signal, wherein the detected signal reflects the real-time pulse characteristic of a detected person;
performing pulse wave identification according to the processing result;
counting the pulse wave fluctuation period according to the identification result;
and outputting the statistical information.
According to a second aspect of the present application, there is provided a processing device for monitoring the time of interruption of cardiopulmonary resuscitation compression, comprising:
the analog-to-digital conversion unit is used for processing a detected signal, and the detected signal reflects the real-time pulse characteristic of a detected person;
the digital signal processing unit is used for carrying out pulse wave identification according to the processing result and counting the pulse wave pause period according to the identification result;
and the output unit is used for outputting the statistical information.
According to a third aspect of the present application, there is provided a medical device comprising:
the light emitting receiver comprises a light emitting tube and a receiving tube, wherein the light emitting tube emits at least one path of optical signal for penetrating through human tissues, and the receiving tube receives the at least one path of optical signal for penetrating through the human tissues and converts the at least one path of optical signal into at least one path of electric signal;
the digital processor is used for converting the electric signal into a digital signal, processing the digital signal, identifying pulse waves according to a processing result and counting the period of the pulse waves;
and the output module is used for outputting the statistical information.
Due to the adoption of the technical scheme, the beneficial effects of the application are as follows:
⑴ in the embodiment of this application, because the period of stopping the pulse wave fluctuation is counted through the recognition result to the pulse wave, and output statistical information, make medical personnel can directly acquire statistical information, for among the prior art, observe the pulse wave waveform through the eyes and judge the pulse wave, this application can show the information of the period of stopping the pulse wave fluctuation directly perceivedly, can remind the doctor to pay attention to avoiding potential danger, so as to do benefit to and improve cardiopulmonary resuscitation success rate.
⑵ in the embodiment of the present application, since the output statistics include the duration of the pulse wave pause time, the doctor can monitor the time of stopping the compression, and the danger to the patient caused by the time of stopping the compression exceeding the specified time can be avoided.
⑶ in the embodiment of the present application, since the output statistical information includes the total time ratio of the statistical pulse wave fluctuation time, the doctor can be intuitively reminded to avoid the danger caused by the reduction of the chest compression time ratio due to subjective factors or negligence.
Drawings
FIG. 1 is a flow diagram of an application method in one embodiment;
FIG. 2 is a schematic diagram of a change in state of manual/mechanical compression in one embodiment;
fig. 3 is a functional block diagram of the apparatus of the present application in one embodiment.
Detailed Description
The present application will be described in further detail below with reference to the accompanying drawings by way of specific embodiments.
The first embodiment is as follows:
as shown in fig. 1, one embodiment of the pulse wave processing method of the present application includes the steps of:
step 102: and processing the detected signal, wherein the detected signal reflects the real-time pulse characteristic of the detected person. The processing of the detected signal specifically comprises:
identifying a fluctuation component and a constant component from a detected signal;
a pulse wave is generated based on the wave component.
The method and the device can establish a sliding time window, and display the pulse wave in the sliding time window.
Step 104: and performing pulse wave identification according to the processing result.
In situations where the patient is not recovering from spontaneous circulation, high quality chest compressions should be performed with as little interruption as possible. Interruption of the compression often results from factors such as endotracheal intubation or replacement of the compressor during manual compression. The latest guidelines for cardiopulmonary resuscitation suggest that the time ratio for chest compressions should be above 80%, that interruption of chest compressions cannot exceed 10 seconds, and that prolonged interruption of compressions will significantly reduce the rate of return of spontaneous circulation. Under the actual clinical rescue condition, the interruption of the compression time cannot be monitored, medical personnel cannot be reminded in time, the compression interruption for too long time is often caused, the proportion of the external chest compression time is reduced, and the recovery of the autonomous circulation of the patient is not facilitated.
On the premise that the patient does not have spontaneous circulation, the heart is pressed and extruded manually, the beating of the heart can be generated, and blood circulation can be formed at the tip of the finger. Once such compression ceases, blood circulation is lost. The blood oxygen system shows that: if the pressing exists, the pulse wave signal exists, the pressing stops, and the pulse wave disappears. Therefore, the manual/mechanical pressing state of the pulse wave can be recognized by the change of the pulse wave. The manual/mechanical compression states described herein include a compression continuous state and a compression intermittent state. When the manual/mechanical pressing state is a pressing continuous state, the pulse wave is continuous; when the manual/mechanical pressing state is the pressing intermittence state, the pulse wave is stopped.
The identification of the pulse wave can be identified by the Amplitude (Amplitude) and Width (Width) of the single pulse. The amplitude is the AC component, and the width is the mapping of the number of sampling points of the single pulse frequency. The mapping relation between the sampling point number and the frequency and the pulse is as follows:
PulseRate＝60*fHz＝60*SampleRate/Width
PulseRate is the number of pulses per minute (unit: times/minute), fHzFor the single pulse frequency, SampleRate is the blood oxygen signal sampling rate, and Width is the pulse Width of the single pulse, i.e. the number of sampling points. The time domain area index isBased on the width of a single pulse.
The traditional method only extracts the amplitude and width information of a single pulse wave and can be used for judging whether the pulse wave is a one-time complete pulse wave. Under the adverse circumstances of clinical pressing rescue, the interference may increase the difficulty of pulse wave identification, and only depending on amplitude and width information, a false identification phenomenon may occur.
In one embodiment, performing pulse wave identification includes:
and taking a plurality of single pulse waves, and identifying the period of the pulse wave fluctuation according to the change of the single pulse waves.
In one embodiment, at least 3 consecutive single pulse waves can be taken, and the pulse wave pause period can be identified through the change of the area value of the single pulse wave or the change of the waveform of the single pulse wave.
In order to improve the identification accuracy of the pulse wave/non-pulse wave, more characteristic information can be adopted to assist identification. In one embodiment, the method of the present invention includes a method of changing the fluctuation of the area value of a plurality of (e.g., 3 or more) continuous single pulse waves or a method of correlating the waveform shape of a plurality of (e.g., 3 or more) continuous single pulse waves, and by adding these methods, the rate of recognizing the pulse and pulseless states can be greatly increased, and the influence of clinical disturbance on parameter measurement can be reduced.
Step 106: counting the pulse wave fluctuation period according to the identification result;
in the present application, the period of the pulse wave extinction is the manual/mechanical compression rest period.
In one embodiment, the counting of the pulse wave pause period according to the identification result comprises: and counting the time length of the pulse wave stopping time.
In another embodiment, the counting of the pulse wave pause period according to the recognition result further comprises:
and counting the total time ratio of the pulse wave stopping time, wherein the total time ratio of the pulse wave stopping time is the ratio of the accumulated time length of the pulse wave stopping period to the cardio-pulmonary resuscitation operation time length.
In another embodiment, the counting of the pulse wave pause period according to the recognition result further comprises:
presetting a first threshold and a second threshold;
when the duration of the pulse wave stopping period is greater than a first threshold value, outputting alarm prompt information;
and/or when the total time-occupying ratio of the pulse wave extinction time is larger than a second threshold value, outputting alarm prompt information.
The application can realize the total timing in the following modes: 1. when a patient is defaulted to clamp and wear the probe, timing is started, and when the probe is empty and is not connected with the patient, automatic zero clearing is carried out (the probe is a medium for collecting physiological signals of the patient); 2. a start button and a stop button are arranged, in the using process, the operation of doctors and nurses is realized, and in the application process, the start is clicked, namely, the total time timing is started, and the stop is clicked, namely, the total time timing statistics is stopped.
At the end of the intermittent period of manual/mechanical compression, the manual/mechanical compression state is changed into a manual/mechanical compression continuous state, namely, when the compression waveform appears again, the state is not timed.
In one embodiment, the total occupancy time ratio of the pulse wave extinction time is calculated by the following formula:
wherein the content of the first and second substances,
accumulating statistics for sampling points of a manual/mechanical pressing process;
accumulating and counting sampling point data of an artificial/mechanical intermittent period in the artificial/mechanical pressing process; wherein P is 1,2,3, … … P, P refers to the P-th manual/mechanical pause period; p refers to the total number of manual/mechanical pauses that occur during the manual/mechanical compression of N point lengths; q is 1,2,3, … … Q, Q is the Q-th point in the p-th CPR intermission period, and Q refers to the total number of points for which the p-th manual/mechanical intermission period lasts.
Step 108: and outputting the statistical information. The application can display the statistical information on the display screen.
On the basis of accurate single pulse wave signal identification, the pulse wave processing method comprises the following steps:
step 202: establishing a sliding time window, comprehensively inspecting the pulse wave state in the window, wherein the time of the sliding time window can be set according to the actual condition, and the default setting of the time window is 10S; as shown at D (i.e., Slip Window) in fig. 2.
Step 204: and judging the pulse wave state in the sliding time window, and performing other new operations according to the identification state. From the view point of response speed and stability, the default measurement of the application is 3pulse wave characteristics, and whether the pulse wave characteristics are in a manual/mechanical compression continuous state or in a manual/mechanical compression intermittent state is determined according to the pulse wave characteristics. As shown in the figure, in the a (i.e., CPR Duration 1) state and the C (i.e., CPR Duration 2) state, if the > 3pulse wave feature analysis identifies a manual/mechanical compression pulse wave, the timing statistics of the pulse wave pause time will not be started.
Step 206: when the sampling signal enters a pulse-free state, the pulse wave extinction time timing is started. The time timing is accumulated according to the number of sampling points, and the sampling rate of each period is 1S. Eventually appearing as a manual/mechanical compression pause second time timer. As shown in the B (i.e., Interval Without CPR) section of the figure, as indicated by the position labeled "1". A CPR pause time timer is started from that location and this information is provided to the client. At the end of the manual/mechanical compression pause time, i.e., when the compression waveform reappears, the CPR pause time timing display function stops and is reset by zero clearing.
In practical application, based on the principle of weighing > -3 pulse wave characteristics, when the patient enters the pulse-free state, the patient will continue to weigh the data with > -3 pulse wave length to determine whether the patient enters the manual/mechanical compression pause period based on the recognition result. This means that the manual/mechanical press pause time timing display function has a hysteresis feature. Similarly, when the manual/mechanical pressing stage is started from the manual/mechanical pressing intermission period, the manual/mechanical pressing intermission time timing display function can continuously exist for a period of time under the influence of pulse wave identification and judgment, and the timing display function can be closed and reset after the pressing pulse wave is identified. As shown in fig. 2, the timing display of the statistical manual/mechanical compression time does not appear at the position of the drawing reference numeral "1", but at the position of the reference numeral "2". Similarly, when the C phase is entered, the CPR intermittent time counting display is turned off and reset after the time that the time duration > is 3 pulses.
The hysteresis feature of the manual/mechanical compression pause time timing display function depends on the width of the identified pulse wave, i.e. the pulse frequency. The higher the pulse rate, the shorter the time required for recognition, and vice versa. The default analysis > is 3pulse waves, and the physiological pulse wave range is [ 20-300 ] BPM (corresponding to the pulse frequency is [ 0.33-5 ] Hz), so that the response speed of the method for identifying the manual/mechanical pressing intermittent time is 9-0.6S;
3Pulse means analyzing at least 3Pulse periods, [0.33 Hz-5 Hz ] means identifying the frequency covered by the Pulse width.
According to the CPR guidelines, the compression frequency must satisfy > 100 times/min, and by substituting the above formula, it is found that about 1.64S can identify the compression waveform state. Therefore, in clinical application, the typical response time of the intermittent time of the manual/mechanical pressing is 1.64S, the requirement of clinical special sensitivity to time can be met, the treatment accuracy of doctors is improved, and the survival probability of patients is increased.
Step 208: and if the pulse wave stop time exceeds a threshold value, alarming. Numerous studies have shown that CPR pause times in excess of 10S have an effect on patient physiology. Therefore, the pulse wave extinction time statistic function of the application sets a 10S time threshold. And if the timing time is greater than 10S, giving an alarm prompt message.
Step 210: meterAnd calculating the total time ratio of the pulse wave stagnation time to the CPR intermittent time. According to the guideline requirements, when the intermittent time accounts for more than 20% of the rescue time of the whole manual/mechanical pressing, the patient can be positively rescued and invalid. The present application establishes a CPR pause time total time to hours ratio
To reflect the characteristics. The calculation formula is as follows:
As can be seen from the foregoing, there is a correspondence between sampling rate and time, as described in the present application
In the parameter, since the numerator and denominator need to be converted into time at the same time, and the sampling rates of the two are consistent, in this formula, the sampling rate factor is eliminated,
substantially equivalent to time, it reflects the fraction of CPR pause time in total manual/mechanical compression time.
In the practical application of the method, the material is,
the parameters may be dynamically updated in real time. Namely, in the process of manual/mechanical pressing rescue, every time the blood oxygen system collects a sampling point, the sampling point is brought into
In statistics; meanwhile, according to the judgment logic, whether the sampling point is included is identified
And (6) counting. Thus, at each sampling point, the CPR total time ratio is refreshed. The application defaults to refresh according to the sampling rate, namely, refreshing the result once in 1S. As shown in the figure "CPR Interval Ratio", as manual/mechanical compressions are initiated,
will appear in the display interface.
As can be seen from the foregoing, in the identification process, identification is required>Whether the pulse wave is in the pressed state or the intermittent state can be judged only by 3pulse wave period lengths, so that the pulse wave pressing device is in the pressed state or the intermittent state
There is also a time lag in the display, i.e. the 3 and 4 positions shown in the figure. The theoretical 3-position and the actual 4-position. The typical time for this lag is 1.64S.
The CPR pause time always-in-time ratio accompanies the entire cycle of manual/mechanical compressions until the manual/mechanical compression state is reset and the CPR pause time always-in-time ratio stops displaying. Thus, there are two mechanisms by which the CPR pause time duty cycle can be reset: 1. identifying spontaneous heart rhythm recovery during manual/mechanical compression; 2. an externally triggered reset mechanism (e.g., a reset button of the monitor).
Step 210: and outputting the statistical information. The statistical information can be output through the display screen, such as displaying the pulse wave stagnation time and/or the total time ratio of the pulse wave stagnation time.
The method is based on the feature detection realized by a time-domain pulse wave identification method. Due to the energy conservation characteristics of the time domain and the frequency spectrum, the detection and identification of the characteristics can be realized based on a frequency domain method. Frequency domain analysis depends on how long the data is analyzed. The data is too long, the characteristics reflecting the change trend of the physiological signals become slow, the data is too short, and frequency domain analysis ineffectiveness caused by insufficient precision is easy to occur. In the present application, in combination with a clinical application scenario, a frequency domain data analysis length of 4S is set, that is, a data length of each time of frequency domain analysis is 4S. To quickly track changes in the physiological signal, the frequency domain analysis was set to 0.5S once initiated.
The width and amplitude characteristics of the time domain pulse wave can be quantified as the amplitude and width of the spectral peak in the frequency domain signal. Therefore, the present application can use the amplitude or area parameter of the spectral peak to measure the interval period of manual/mechanical compression and the interval time ratio of manual/mechanical compression. In the presence of CPR pause periods, the spectral peak amplitude or area is characterized by a gradual decay with analysis every 0.5S. Thus, an amplitude or area threshold line may be established, and it is detected whether 4 times (i.e. 2S) of spectral peak amplitudes or areas are both below the threshold line, and if so, it is considered to be a manual/mechanical compression pause, otherwise, it is continued to be in a manual/mechanical compression state.
The same principle as time domain analysis, there is a display time lag between manual/mechanical compression pauses, which depends on the time interval of the frequency domain analysis, and the number of analyses. The time interval of the frequency domain analysis of the application is 0.5S, and the analysis is carried out 4 times, so that the typical lag time is 2S. The minimum resolution of the CPR pause period is constrained by the frequency domain analysis interval time, 0.5S. And when the manual/mechanical pressing state is recognized, starting time timing display of the manual/mechanical pressing intermission period, and when the manual/mechanical pressing state is recognized, closing the manual/mechanical pressing intermission period time timing function. In the same principle as the time domain analysis, the ratio of the pause time of manual/mechanical compression (i.e., the total ratio of the pause time of CPR described above) is the starting timing statistic during manual/mechanical compression. And accumulating the total time every 0.5S frequency domain analysis, judging whether the CPR interval period is the CPR interval period, and accumulating the time of the CPR interval period. The CPR pause time ratio is CPR pause time/total time 100%. The minimum resolution of the CPR pause time to fraction is constrained by the frequency domain analysis interval time, 0.5S. The starting and resetting mechanism is completely consistent with the time domain partial description mechanism.
Example two:
as shown in fig. 3, one embodiment of the pulse wave processing device according to the present invention includes: the analog-to-digital conversion unit is used for processing the detected signal, and the detected signal reflects the real-time pulse characteristic of the detected person; the digital signal processing unit is used for carrying out pulse wave identification according to the processing result and counting the pulse wave pause period according to the identification result; and the output unit is used for outputting the statistical information.
The analog-to-digital conversion unit is also used for identifying a fluctuation component and a constant component from the measured signal, and the digital signal processing unit is also used for identifying a pulse wave based on the fluctuation component.
In one embodiment, the digital signal processing unit is further configured to count the duration of the pulse wave pause time.
In another embodiment, the digital signal processing unit is further configured to count a total occupancy ratio of the pulse wave pause time, wherein the total occupancy ratio of the pulse wave pause time is a ratio of an accumulated duration of the pulse wave pause period to a cardiopulmonary resuscitation operation duration.
In another embodiment, the digital signal processing unit is further configured to preset a first threshold and a second threshold, and output an alarm prompt message when the duration of the pulse wave stopping period is greater than the first threshold; and/or when the total time-occupying ratio of the pulse wave extinction time is larger than a second threshold value, outputting alarm prompt information.
In one embodiment, the digital signal processing unit calculates the total occupancy rate of the press pause time by using the following formula:
wherein the content of the first and second substances,
accumulating statistics for sampling points of a manual/mechanical pressing process;
accumulating and counting sampling point data of an artificial/mechanical intermittent period in the artificial/mechanical pressing process; wherein P is 1,2,3, … … P, P refers to the P-th manual/mechanical pause period; p refers to the total number of manual/mechanical pauses that occur during the manual/mechanical compression of N point lengths; q is 1,2,3, … … Q, Q is the Q-th point in the p-th CPR intermission period, and Q refers to the total number of points for which the p-th manual/mechanical intermission period lasts.
The digital signal processing unit can also be used for taking a plurality of single pulse waves and identifying the period of the pulse wave extinction through the change of the plurality of single pulse waves. In one embodiment, the digital signal processing unit is further configured to take at least 3 cycles of continuous single pulse waves, and identify the pulse wave pause period through a change in an area value of the single pulse wave or a change in a waveform of the single pulse wave.
The digital signal processing unit can also be used for presetting a threshold value; and when the pressing pause time is greater than the threshold value, outputting alarm prompt information. The threshold may be set as needed, and in the present embodiment, the threshold may be set to 10S.
Example three:
the medical device of the present application, one embodiment of which comprises:
the light emitting receiver comprises a light emitting tube and a receiving tube, wherein the light emitting tube emits at least one path of optical signal for penetrating through human tissues, and the receiving tube receives the at least one path of optical signal for penetrating through the human tissues and converts the at least one path of optical signal into at least one path of electric signal; the digital processor is used for converting the electric signal into a digital signal, processing the digital signal, identifying pulse waves according to a processing result and counting the period of the pulse waves; and the output module is used for outputting the statistical information.
In one embodiment, the digital processor identifies the pulse wave by identifying real-time pulse characteristics reflected by the digital signal.
The digital processor may also derive real-time pulse characteristics reflected by the digital signal by identifying fluctuating and constant components of the digital signal.
In one embodiment, the statistical information includes a duration of the pulse wave pause period, and the output module may include a display interface for displaying the duration of the pulse wave pause period. In another embodiment, the statistical information further includes a total time ratio of the pulse wave pause time, the total time ratio of the pulse wave pause time is a ratio of an accumulated time duration of the pulse wave pause period to a cardiopulmonary resuscitation operation time duration, and the display interface is further configured to display the total time ratio of the pulse wave pause time. The digital processor is also used for presetting a first threshold value and a second threshold value and outputting alarm prompt information when the duration of the pulse wave stopping period is greater than the first threshold value; and/or when the total time-occupying ratio of the pulse wave extinction time is larger than the second threshold value, outputting alarm prompt information.
The foregoing is a more detailed description of the present application in connection with specific embodiments thereof, and it is not intended that the present application be limited to the specific embodiments thereof. It will be apparent to those skilled in the art from this disclosure that many more simple derivations or substitutions can be made without departing from the spirit of the disclosure.
Claims (23)
1. A method of monitoring cardiopulmonary resuscitation compression interruption time, comprising:
processing a detected signal, wherein the detected signal reflects the real-time pulse characteristic of a detected person in a state without autonomous circulation;
performing pulse wave identification according to the processing result;
identifying a pulse wave fluctuation period according to the change of the pulse wave, wherein the pulse wave fluctuation period is a period of pulse wave disappearance caused by the stop of chest compression;
counting the pulse wave fluctuation period;
and outputting the statistical information.
2. The method of claim 1, wherein the processing the measured signal comprises:
identifying a fluctuation component and a constant component from a detected signal;
the pulse wave recognition according to the processing result comprises the following steps:
a pulse wave is identified based on the wave component.
3. The method of claim 2, wherein the identifying the pulse wave based on the fluctuation component comprises identifying the pulse wave by a magnitude and a width of the pulse.
4. The method of claim 1, wherein said counting pulse wave pause periods comprises:
and counting the accumulated duration of the pulse wave stopping period.
5. The method of claim 4, wherein said counting pulse wave pause periods further comprises:
and counting the total time ratio of the pulse wave stopping time, wherein the total time ratio of the pulse wave stopping time is the ratio of the accumulated time length of the pulse wave stopping period to the cardio-pulmonary resuscitation operation time length.
6. The method of claim 5, wherein the counting of the pulse wave pause periods according to the recognition result further comprises:
presetting a first threshold and a second threshold;
when the duration of the pulse wave stopping period is greater than the first threshold value, outputting alarm prompt information;
and/or when the total time-to-hour ratio of the pulse wave extinction time is larger than the second threshold value, outputting alarm prompt information.
7. The method of claim 1, wherein the performing pulse wave identification comprises:
and taking a plurality of single pulse waves, and identifying the period of the pulse wave extinction through the change of the single pulse waves.
8. The method according to claim 7, wherein said taking a plurality of single pulse waves and identifying the pulse wave pause period by the variation of the plurality of single pulse waves comprises:
and at least taking continuous single pulse waves of 3 periods, and identifying the pulse wave pause period through the change of the area value of the single pulse wave or the change of the waveform of the single pulse wave.
9. The method of claim 1, wherein the period of pulse wave cessation is a manual/mechanical compression pause.
10. The method according to claim 1, wherein the processing of the measured signal is performed by time domain calculation and/or frequency domain calculation.
11. A device for monitoring the time to interruption of cardiopulmonary resuscitation compression, comprising:
the analog-to-digital conversion unit is used for processing a detected signal, and the detected signal reflects the real-time pulse characteristic of a detected person in a state without autonomous circulation;
a digital signal processing unit for performing pulse wave recognition according to the processing result and recognizing a pulse wave fluctuation period according to the change of the pulse wave, wherein the pulse wave fluctuation period is a period of pulse wave fluctuation caused by the chest compression stop, and the pulse wave fluctuation period is counted;
and the output unit is used for outputting the statistical information.
12. The apparatus of claim 11, wherein the analog-to-digital conversion unit is further configured to identify a fluctuation component and a constant component from the measured signal, and the digital signal processing unit is further configured to identify the pulse wave based on the fluctuation component.
13. The apparatus of claim 11, wherein the digital signal processing unit is further configured to count accumulated durations of the pulse wave pause periods.
14. The apparatus of claim 13, wherein the digital signal processing unit is further configured to count a total time fraction of the pulse wave pause time, the total time fraction of the pulse wave pause time being a ratio of a cumulative duration of the pulse wave pause period to a duration of the cardiopulmonary resuscitation operation.
15. The apparatus of claim 14, wherein the digital signal processing unit is further configured to preset a first threshold and a second threshold, and output an alarm prompt message when the duration of the pulse wave pause period is greater than the first threshold; and/or when the total time-occupying ratio of the pulse wave extinction time is larger than the second threshold value, outputting alarm prompt information.
16. The apparatus of claim 15, wherein the digital signal processing unit is further configured to take a plurality of single pulse waves, and identify the pulse wave pause period by a change of the plurality of single pulse waves.
17. The apparatus according to claim 16, wherein the digital signal processing unit is further configured to take at least 3 cycles of continuous single pulse waves, and identify the pulse wave pause period by the change of the single pulse wave area value or the change of the single pulse wave waveform.
18. A medical device, comprising:
the light emitting receiver comprises a light emitting tube and a receiving tube, wherein the light emitting tube emits at least one path of optical signal for penetrating through human tissues, and the receiving tube receives the at least one path of optical signal for penetrating through the human tissues and converts the at least one path of optical signal into at least one path of electric signal;
a digital processor for converting the electrical signal into a digital signal, processing the digital signal, performing pulse wave recognition according to a processing result, recognizing a pulse wave fluctuation period according to a change of the pulse wave, wherein the pulse wave fluctuation period is a period of pulse wave fluctuation caused by the chest compression stop, and counting the pulse wave fluctuation period;
and the output module is used for outputting the statistical information.
19. The medical device of claim 18, wherein the digital processor identifies pulse waves by identifying real-time pulse characteristics reflected by the digital signals.
20. The medical device of claim 19, wherein the digital processor derives real-time pulse characteristics reflected by the digital signal by identifying fluctuating and constant components of the digital signal.
21. The medical device of claim 18, wherein the statistical information includes an accumulated duration of pulse wave pauses; the output module comprises a display interface, and the display interface is used for displaying the accumulated duration of the pulse wave pause period.
22. The medical device of claim 21, wherein the statistical information further includes a total time to pulse wave cessation ratio of a cumulative duration of pulse wave cessation to a duration of cardiopulmonary resuscitation operations; the display interface is also used for displaying the total time-occupying ratio of the pulse wave extinction time.
23. The medical device of claim 22, wherein the digital processor is further configured to preset a first threshold and a second threshold, and to output an alarm prompt when the duration of the pulse wave pause period is greater than the first threshold; and/or when the total time-occupying ratio of the pulse wave extinction time is larger than the second threshold value, outputting alarm prompt information.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410208903.9A CN105078422B (en) | 2014-05-16 | 2014-05-16 | Method and apparatus for monitoring cardiopulmonary resuscitation compression interruption time |
| US14/497,209 US9949892B2 (en) | 2013-10-11 | 2014-09-25 | Pulse oximetry-based cardio-pulmonary resuscitation (CPR) quality feedback systems and methods |
| EP14186454.6A EP2859913B1 (en) | 2013-10-11 | 2014-09-25 | Pulse oximetry-based Cardio-Pulmonary Resuscitation (CPR) quality feedback systems and methods |
| US15/927,879 US10463566B2 (en) | 2013-10-11 | 2018-03-21 | Pulse oximetry-based cardio-pulmonary resuscitation (CPR) quality feedback systems and methods |
| US16/578,122 US11471375B2 (en) | 2013-10-11 | 2019-09-20 | Pulse oximetry-based cardio-pulmonary resuscitation (CPR) quality feedback systems and methods |
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| CN106880138B (en) * | 2017-01-13 | 2019-02-22 | 方世雄 | Embedded wearable watchband for smartwatch |
| CN114983794B (en) * | 2022-08-03 | 2022-11-04 | 苏州尚领医疗科技有限公司 | Risk feedback device for chest compression, storage medium and electronic equipment |
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| US4863385A (en) * | 1987-01-05 | 1989-09-05 | Pierce Richard S | Cardiopulmonary resuscitation (CPR) sequencer |
| JP3114142B2 (en) * | 1998-05-28 | 2000-12-04 | マイクロライフ システムズ エージー | Device for simultaneous measurement of blood pressure and detection of arrhythmia |
| US20030109790A1 (en) * | 2001-12-06 | 2003-06-12 | Medtronic Physio-Control Manufacturing Corp. | Pulse detection method and apparatus using patient impedance |
| CN101073496B (en) * | 2006-05-17 | 2011-05-11 | 优盛医学科技股份有限公司 | Method and device for discriminating irregular heartbeat |
| GB2465817A (en) * | 2008-11-10 | 2010-06-09 | Rashid Mazhar | CPR feedback system |
| CN103210391B (en) * | 2010-11-12 | 2016-08-10 | Zoll医疗公司 | The real-time assessment of CPR performance |
| CN107041838B (en) * | 2013-10-11 | 2020-09-08 | 中国医学科学院北京协和医院 | Cardio-pulmonary resuscitation quality feedback control system based on pulse blood oxygen |
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