CN210903016U - Device for evaluating airflow limitation of subject - Google Patents
Device for evaluating airflow limitation of subject Download PDFInfo
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- CN210903016U CN210903016U CN201821788337.3U CN201821788337U CN210903016U CN 210903016 U CN210903016 U CN 210903016U CN 201821788337 U CN201821788337 U CN 201821788337U CN 210903016 U CN210903016 U CN 210903016U
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Abstract
The utility model provides a device for evaluating the airflow limitation of a subject, which comprises a respiration measuring module, a respiration signal acquisition module and a respiration signal acquisition module, wherein the respiration measuring module is used for measuring the respiration activity of the subject; a sleep monitoring module for monitoring a sleep state of a subject to distinguish between awake stages and sleep stages; a processor for processing respiratory signals obtained by the respiratory measurement module, the processor configured to: calculating a magnitude of change of the second respiratory signal relative to the first respiratory signal based on the first respiratory signal associated with the awake phase and the second respiratory signal associated with the sleep phase; determining a degree of airflow restriction of the subject based on the magnitude of change.
Description
Technical Field
The present invention relates to a device for assessing airflow limitation in a subject, and in particular to a device for determining the degree of airflow limitation in a subject by monitoring the respiratory activity during the awake and sleep phases.
Background
Chronic obstructive pulmonary disease is a pulmonary disease characterized by persistent obstruction of airflow from the lungs. Slow obstructive pulmonary disease has high morbidity and mortality, and global disease burden research reports indicate that 2.51 hundred million cases of chronic obstructive pulmonary disease exist in 2016, 300 ten thousand cases of death occur in the world, and the death causes are the third cause of death in the world. The pulmonary function examination is the most objective and good-repeatability means for detecting the airflow limitation, the FEV1/FVC is less than 70 percent, the airflow limitation can be determined, and a doctor can comprehensively diagnose whether the subject has the chronic obstructive pulmonary disease according to the pulmonary function examination result, the medical history of the subject and the contact condition of risk factors. FEV1 is the amount of air that has been exhaled at the end of the first second of forced exhalation. FVC is the volume of air exhaled from the deepest inhalation of the greatest effort to exhale. Although the definition of chronic obstructive pulmonary disease is based on airflow limitation, patients usually suffer from the influence of certain symptoms such as cough, phlegm, asthma on daily life, or some chronic symptoms persist, or go to a clinic due to an acute exacerbation. Chronic obstructive lung progresses slowly with hidden early symptoms, while most patients are already in the middle and late stages of the disease once obvious symptoms appear. If the pulmonary function of the subject is weakened or the condition of airflow limitation is found to exist in the early stage, the subject can be reminded to carry out health management in the future or go to a hospital for diagnosis in time, and the condition that the serious airflow limitation is developed or the chronic obstructive pulmonary disease is aggravated is avoided.
Therefore, there is a need for a device that can assess airflow limitation in a subject in everyday life, i.e., that can be used at home and that can reflect to some extent the airflow limitation of the subject.
SUMMERY OF THE UTILITY MODEL
To solve the above problems, the present invention provides an apparatus for evaluating the limitation of airflow of a subject, comprising:
a respiration measurement module for measuring respiration activity of a subject to obtain a respiration signal;
a sleep monitoring module for monitoring a sleep state of a subject to distinguish between awake stages and sleep stages;
a processor for processing data obtained by the respiratory measurement module, the processor configured to: calculating a magnitude of change of the second respiratory signal relative to the first respiratory signal based on the first respiratory signal associated with the awake phase and the second respiratory signal associated with the sleep phase; determining a degree of airflow restriction of the subject based on the magnitude of change.
Furthermore, the limited degree of airflow obtained by the device provided by the utility model is related to chronic obstructive pulmonary disease.
Further, the respiratory signal includes at least one of tidal volume and minute ventilation.
Preferably, the respiratory measurement module comprises a thoracic impedance electrode.
Preferably, the sleep monitoring module comprises at least one of an electroencephalogram electrode and an electrocardio-electrode.
Preferably, the sleep monitoring module is further operable to distinguish between non-rapid eye movement sleep stages and rapid eye movement sleep stages.
Preferably, the device provided by the utility model also comprises a blood oxygen monitoring module for collecting the blood oxygen information of the subject; the processor is configured to determine a degree of airflow restriction of the subject based on the respiration rate and the blood oxygen information.
Adopt the utility model provides a device for assessing experimenter air current is limited, thereby can understand the change of experimenter respiratory activity when sleeping compare in when waking to assess its limited degree of air current clearly. While awake, respiratory information is typically the result of the inclusion of a subject's strenuous breathing; while sleeping, the subject is in a fully relaxed state, and the obtained breathing information is the most real breathing of the subject. Based on this, when the lung function of the subject is weakened, a large difference is generated in the breathing signals during waking and sleeping. The utility model provides a device for assessing the limited degree of experimenter air current is light, and operation method is simple, can be used at home for a long time, except daily understanding self lung function information, carry out health management and still can be used to confirm to diagnose for the daily monitoring of the patient who hinders the lung slowly, the patient can be according to the limited degree's of air current change assessment slowly hinder the treatment effect of lung, or according to the limited degree of air current in time change life style etc..
Drawings
FIG. 1 is a schematic diagram of an apparatus for evaluating airflow restriction according to one embodiment;
FIG. 2 is a schematic structural diagram of an apparatus for evaluating airflow limitation provided in the second embodiment;
FIG. 3 is a schematic view of the device for assessing airflow limitation according to the second embodiment;
Detailed Description
The utility model provides a device for assessing that the air current of a testee is limited.
Example one
Fig. 1 illustrates an apparatus 10 for assessing airflow limitation information of a subject provided by the present invention. The apparatus 10 includes a respiration measurement module 11, a sleep monitoring module 12, and a processor 13. The processor 13 is connected with the respiration measuring module 11 and the sleep monitoring module 12 in a wireless or wired mode, and can receive information collected by the three modules. Furthermore, the processor 13 may be communicatively connected to a data transmission unit 14 and a display unit 15 for outputting and displaying the analysis results.
The device 10 is adapted to be worn on a subject when the subject is ready to fall asleep, the wearing time encompassing the entire sleeping process of waking and actually sleeping before falling asleep, and comprises a fixation unit for fixing the device 100 to the subject.
The respiration measurement module 11 is used for acquiring a respiration signal of the subject, wherein the respiration signal comprises at least one of tidal volume and minute ventilation. The respiration measuring module 11 can adopt any technical means for acquiring respiration signals, such as a volume description tape, a chest impedance electrode, an oral nasal mask, a nasal oxygen tube and the like.
The sleep monitoring module 12 is used for determining the sleep state of the subject, including a waking stage and a sleep stage, and the sleep monitoring module 12 may adopt any technical means for sleep monitoring, such as an electroencephalogram electrode, an electrocardiograph electrode, and the like.
The processor 13 is configured to process various signals, including associating a sleep state with a respiration signal, specifically, when the sleep monitoring module 12 finds that the state of the subject is awake, the processor 13 records the signal acquired by the respiration measurement module 11 when the subject is in the awake state as a first respiration signal; similarly, when the sleep monitoring module 12 obtains that the state of the subject is sleep, the processor 13 records the signal acquired by the respiration measuring module 11 when the subject is in the sleep state as the second respiration signal.
The processor 13 is used to process the various signals, including calculating the mean of the first and second respiratory signals, respectively. If the respiratory signal collected in this embodiment is minute ventilation, the processor 13 calculates the total value of the first respiratory signal of the total duration of the waking period, i.e. the total ventilation amount of the waking period; and calculating the mean value of the first respiratory signal according to the total minute ventilation and the total waking time. Similarly, the processor 13 may derive a second mean value of the respiratory signal based on the effective total sleep duration and the total ventilation for the sleep stage.
The processor 13 is configured to process various signals reflecting the change in the breathing signal during sleep compared to awake, including calculating a ratio of the mean value of the second breathing signal to the mean value of the first breathing signal. The processor 13 finally estimates the degree of airflow restriction of the subject from the ratio, and the smaller the value of the ratio, the more severe the degree of airflow restriction of the subject is reflected. In addition to the ratio of the mean value of the second respiratory signal to the mean value of the first respiratory signal, the processor 13 may also use the rate of change of the mean value of the second respiratory signal and the mean value of the first respiratory signal to reflect the degree of airflow limitation.
In addition to calculating the mean value of the respiration signal and the rate of change of the mean value of the respiration signal as described in the first embodiment, the processor of the present invention may be configured to use other statistical methods that effectively compare the difference of the data to obtain the amplitude of change of the first respiration signal and the second respiration signal.
The subject may also wear the device 10 for extended periods of time for monitoring changes in the degree of airflow restriction. The processor 13 itself includes a storage unit that stores data collected a plurality of times. In order to reflect the change of the airflow limitation degree of the subject, the multiple ratios can be compared and analyzed, and if the ratio is in a trend of increasing, the airflow limitation of the subject is improved; if the ratio is on the trend of decreasing, it indicates that the airflow limitation of the subject is more serious. Based on this, the device 10 can be used for efficacy assessment or daily monitoring of a subject after receiving treatment.
Example two
As shown in FIG. 3, a device 20 for evaluating the degree of airflow restriction includes an electrode pad 21 and a blood oxygen probe 22, and a host computer 23, wherein the electrode pad 21 and the blood oxygen probe 22 are connected with the host computer 23 in a wired manner. The device 20 may be affixed to the subject by means of an adhesive, two electrode pads 21 being affixed to the chest area of the subject, and a blood oxygen probe 22 being worn on the distal end of the subject's finger. Fig. 2 shows a block diagram of an apparatus 20 for evaluating the degree of airflow limitation, in which a host 23 includes a respiration monitoring module 201, a sleep monitoring module 202, and a processor 203.
The sleep monitoring module 202 is configured to determine a sleep state of the subject, including a waking stage and a sleep stage, wherein the sleep stage is further divided into a non-rapid eye movement sleep stage and a rapid eye movement sleep stage, i.e., a total of three stages, namely, a waking stage, a non-rapid eye movement sleep stage and a rapid eye movement sleep stage. The electrode plate 21 is connected with the sleep monitoring module 202, the electrode plate 21 can collect electrocardiosignals of a testee and send the electrocardiosignals to the sleep monitoring module 202, and the sleep monitoring module 202 can determine the sleep state of the testee according to the electrocardiosignals.
The respiration measurement module 201 is used for acquiring a respiration signal of the subject, and the respiration signal in this embodiment is tidal volume. The electrode plate 21 is connected with the respiration measurement module 201, and the electrode plate 21 can collect the thoracic impedance signal of the testee besides the electrocardiosignal of the testee and send the thoracic impedance signal to the respiration measurement module 201. The respiration measurement module 201 can then derive the tidal volume from the thoracic impedance signal.
The electrode plate 21 is multiplexed in the embodiment, on one hand, the electrocardiosignal of the subject is collected, and on the other hand, the thoracic impedance signal of the subject is synchronously collected, so that the signal collection channel of the device 20 is simplified, and the use comfort of the subject is improved.
The processor 23 receives the sleep state signal from the sleep monitoring module 202, the tidal volume signal from the respiration measurement module 201, and the blood oxygen saturation signal from the blood oxygen probe 22. When the sleep monitoring module 202 obtains that the state of the subject is awake, the processor 23 records the signal acquired by the respiration measuring module 201 when the subject is in the awake state as a first respiration signal; when the sleep monitoring module 202 obtains that the state of the subject is the non-rapid eye movement sleep state, the processor 23 records the signal acquired by the respiration measuring module 201 when the subject is in the sleep state as a third respiration signal; when the sleep monitoring module 202 obtains that the state of the subject is the rapid eye movement sleep state, the processor 23 records the signal acquired by the respiration measuring module 201 when the subject is in the sleep state as the fourth respiration signal. And combining the third respiratory signal and the fourth respiratory signal to obtain a respiratory signal when the subject is in a sleep state, and recording the respiratory signal as a second respiratory signal.
The processor 23 is configured to calculate the first, second, third and fourth mean respiratory signals, i.e. the average tidal volume of the waking phase, the average tidal volume of the sleep phase, the average tidal volume of the non-rapid eye movement phase and the average tidal volume of the rapid eye movement phase. It should be noted that the calculated average tidal volume should not include the time when the tidal volume is zero.
The processor 23 is configured to include a parameter reflecting the magnitude of the change in tidal volume during sleep as compared to waking. The processor calculates and obtains three respiration ratios of the second respiration signal mean value, the third respiration signal mean value and the fourth respiration signal mean value to the first respiration signal mean value respectively.
The three breathing ratios reflect the degree of airflow limitation of the subject while the subject is in the sleep state, the non-rapid eye movement state, and the rapid eye movement state, respectively. The smaller the value of the breathing ratio, the more severely the subject is restricted to airflow at that stage. The air flow limitation degree of the subject can be preliminarily evaluated from the breathing ratio of the sleep state and the waking stage, and the non-rapid eye movement stage and the rapid eye movement stage are distinguished, so that the limitation degree of the subject can be more accurately determined and the disease risk can be evaluated, and the tidal volume of part of patients in the non-rapid eye movement stage is not obviously changed compared with that in the waking stage, and the tidal volume of the rapid eye movement stage is greatly reduced; if the sleep stage is not subdivided, the subject does not enter the rapid eye movement stage in the late test, and meanwhile, the breathing ratio value of the sleep state to the waking state is close to 1, the subject is probably considered to have no breathing limitation, so that the wrong judgment is caused.
The processor 23 is configured to correlate the blood oxygen saturation signal with the sleep state and calculate an average blood oxygen value for the sleep state. In addition, the processor 23 also includes calculating the total duration of the sleep stage blood oxygen value below 90 and recording the lowest blood oxygen value in the sleep state. Combining the respiration rate with the blood oxygenation information allows a further assessment of the degree of airflow limitation in the subject, reflecting the adverse effects of airflow limitation on the body.
The above embodiments only describe and present the present invention, the present invention is not limited to the scope of the above disclosed embodiments, and any modifications covered by the claims or equivalent are all included in the protection scope of the present invention.
Claims (7)
1. An apparatus for assessing airflow limitation in a subject, the apparatus comprising:
a respiration measurement module for measuring respiration activity of a subject to obtain a respiration signal;
a sleep monitoring module for monitoring a sleep state of a subject to distinguish between awake stages and sleep stages;
a processor for processing respiratory signals obtained by the respiratory measurement module, the processor configured to: calculating a magnitude of change of the second respiratory signal relative to the first respiratory signal based on the first respiratory signal associated with the awake phase and the second respiratory signal associated with the sleep phase; determining a degree of airflow restriction of the subject based on the magnitude of change.
2. The device of claim 1, wherein the degree of airflow restriction is associated with chronic obstructive pulmonary disease.
3. The device of claim 1, wherein the respiratory signal comprises at least one of tidal volume and minute ventilation.
4. The apparatus of claim 1, wherein the respiration measurement module comprises a thoracic impedance electrode.
5. The apparatus of claim 1, wherein the sleep monitoring module comprises at least one of a brain electrode, a heart electrode.
6. The apparatus of claim 1, wherein the sleep monitoring module is further operable to distinguish between non-rapid eye movement sleep stages and rapid eye movement sleep stages.
7. The apparatus of claim 1, further comprising a blood oxygen monitoring module for acquiring blood oxygen information of the subject, wherein the processor is configured to determine the degree of airflow restriction of the subject based on the magnitude of change and the blood oxygen information.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821788337.3U CN210903016U (en) | 2018-11-01 | 2018-11-01 | Device for evaluating airflow limitation of subject |
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| CN201821788337.3U CN210903016U (en) | 2018-11-01 | 2018-11-01 | Device for evaluating airflow limitation of subject |
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| CN210903016U true CN210903016U (en) | 2020-07-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109431509A (en) * | 2018-11-01 | 2019-03-08 | 思澜科技（成都）有限公司 | A kind of method and apparatus for assessing subject's flow limitation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109431509A (en) * | 2018-11-01 | 2019-03-08 | 思澜科技（成都）有限公司 | A kind of method and apparatus for assessing subject's flow limitation |
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