CN106709251A - Evaluation method and device - Google Patents
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- CN106709251A CN106709251A CN201611209644.7A CN201611209644A CN106709251A CN 106709251 A CN106709251 A CN 106709251A CN 201611209644 A CN201611209644 A CN 201611209644A CN 106709251 A CN106709251 A CN 106709251A
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- 238000011156 evaluation Methods 0.000 title claims abstract description 44
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 309
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 309
- 239000001301 oxygen Substances 0.000 claims abstract description 309
- 239000008280 blood Substances 0.000 claims abstract description 151
- 210000004369 blood Anatomy 0.000 claims abstract description 151
- 238000005070 sampling Methods 0.000 claims abstract description 41
- 230000004622 sleep time Effects 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 29
- 230000002085 persistent effect Effects 0.000 claims description 6
- 230000002459 sustained effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 14
- 238000005259 measurement Methods 0.000 description 9
- 238000012544 monitoring process Methods 0.000 description 9
- 238000004590 computer program Methods 0.000 description 8
- 238000012806 monitoring device Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 230000003860 sleep quality Effects 0.000 description 7
- 238000012545 processing Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 206010021143 Hypoxia Diseases 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 208000018875 hypoxemia Diseases 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 208000001797 obstructive sleep apnea Diseases 0.000 description 2
- 238000002496 oximetry Methods 0.000 description 2
- 206010021079 Hypopnoea Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 208000008784 apnea Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000414 obstructive effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 201000002859 sleep apnea Diseases 0.000 description 1
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
- G16H50/00—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics
- G16H50/30—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for calculating health indices; for individual health risk assessment
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Abstract
The embodiment of the invention provides an evaluation method and device. The evaluation method includes the steps that multiple blood oxygen parameters obtained after sampling is carried out at preset sampling frequency are acquired; if two or more continuous blood oxygen parameters lower than blood oxygen indexes exist, it is determined that an oxygen desaturation event happens; the integral area corresponding to the oxygen desaturation event is acqrueid according to the two or more blood oxygen parameters lower than the blood oxygen indexes and the preset sampling frequency; the severe degree of the oxygen desaturation event is evaluated according to the integral area. Thus, the accuracy of evaluation of the severe degree of the oxygen desaturation event can be improved, and the comprehensiveness, reliability and precision of the evaluation result are improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of sleep monitoring, in particular to an evaluation method and device.
Background
Modern medicine considers that the occurrence of hypoxemia events is related to obstructive apnea and hypopnea events, and a more effective judgment can be made on an OSAHS (obstructive sleep apnea-hypopnea syndrome) patient through correct analysis of the severity of the hypoxemia events.
In the prior art embodiment, the severity of an oxygen desaturation event is assessed primarily by the following criteria:
1) amplitude index
The amplitude index mainly includes LSaO2(low oxygen saturation during sleep) and mdod (mean oxygen saturation loss during sleep). That is, the amplitude index is evaluated only by a numerical magnitude or depth when evaluating the severity of the oxygen desaturation event, and the larger the depth, the lower the value, the more severe the oxygen desaturation event during sleep, and the worse the sleep quality.
2) The time-length index:
the severity of the oxygen desaturation event is evaluated by DCT (discrete time periods of oxygen desaturation events, the percentage of the cumulative time of oxygen desaturation events during sleep to the total sleep time), i.e., the ratio of the cumulative time of oxygen desaturation events to the total sleep time, and the greater the ratio, the more severe the oxygen desaturation event is during sleep and the worse the sleep quality.
3) Frequency index:
the severity of oxygen desaturation events is measured by ODI (oxygen desaturation index, the average number of oxygen desaturation events per hour of sleep), i.e., the number of occurrences of oxygen desaturation events per hour, and the higher the frequency, the more severe the oxygen desaturation events during sleep and the worse the sleep quality.
The prior art has the following defects:
1) the amplitude index is only for the depth of the oxygen desaturation event, ignoring the effect of the duration of the event on severity.
2) The duration index only targets the duration of the oxygen desaturation event, and ignores the impact of the magnitude of the event on the severity.
3) The frequency index is only for the entire sleep cycle and cannot analyze the severity of a single oxygen desaturation event.
In summary, when the severity of the oxygen desaturation event is evaluated in the prior art, the accuracy of the evaluation result is low due to inaccuracy of parameters, and a large deviation exists. Furthermore, the prior art fails to assess the severity of a single oxygen desaturation event.
Aiming at the problems in the prior art, no effective solution is provided at present.
Disclosure of Invention
The embodiment of the invention provides an evaluation method, which aims to solve the problems of incompleteness and low accuracy in the evaluation of the severity of an oxygen desaturation event in the prior art.
In a first aspect, a method of evaluation is provided, the method comprising:
acquiring a plurality of blood oxygen parameters sampled at a preset sampling frequency;
if two or more continuous blood oxygen parameters lower than the blood oxygen index exist, determining that an oxygen desaturation event occurs;
acquiring an integral area corresponding to an oxygen desaturation event according to two or more blood oxygen parameters lower than the blood oxygen index and a preset sampling frequency;
the severity of the oxygen desaturation event was evaluated in terms of integrated area.
In a preferred embodiment of the present invention, the step of obtaining the integrated area corresponding to the oxygen desaturation event according to two or more blood oxygen parameters lower than the blood oxygen index and a predetermined sampling frequency specifically includes:
the integrated area is calculated according to the following formula:
wherein Y in the formula is a blood oxygen index, n is the number of blood oxygen parameters continuously lower than the blood oxygen index, F is a preset sampling frequency, vnIs a blood oxygen parameter below the blood oxygen index.
In a preferred embodiment of the present invention, the step of evaluating the severity of the oxygen desaturation event in terms of integrated area specifically comprises:
calculating a first ratio of the integrated area to the persistent region area; wherein, the area of the continuous region is the product of the blood oxygen index and the duration of the oxygen desaturation event;
the severity of the oxygen desaturation event is evaluated according to a first ratio.
In a preferred embodiment of the present invention, the severity of an oxygen desaturation event is assessed as follows:
detecting whether the first ratio belongs to a preset interval or not;
if yes, evaluating the oxygen desaturation event according to the severity level corresponding to the preset interval;
or,
comparing the first ratio with ratios corresponding to other oxygen desaturation events; wherein the greater the ratio, the more severe the corresponding oxygen desaturation event.
In a preferred embodiment of the present invention, if more than one oxygen desaturation event occurs during the sleep time, the method further comprises:
calculating the total integral area of the more than one oxygen desaturation event, wherein the total integral area is the sum of integral areas corresponding to the more than one oxygen desaturation event;
calculating a second ratio of the total integrated area to the area of the sleep time zone; wherein, the area of the sleep time region is the product of the blood oxygen index and the sleep time;
the overall severity of more than one oxygen desaturation event is evaluated according to a second ratio.
On the other hand, an embodiment of the present invention further provides an evaluation apparatus, including:
the first acquisition module is used for acquiring a plurality of blood oxygen parameters sampled at a preset sampling frequency;
the determining module is used for determining that an oxygen desaturation event occurs if two or more continuous blood oxygen parameters lower than the blood oxygen index exist;
the second acquisition module is used for acquiring the integral area corresponding to the oxygen desaturation event according to two or more blood oxygen parameters lower than the blood oxygen index and the preset sampling frequency;
and the evaluation module is used for evaluating the severity of the oxygen desaturation event according to the integral area.
In a preferred embodiment of the present invention, the second obtaining module is further configured to calculate the integrated area according to the following formula:
wherein Y in the formula is a blood oxygen index, n is the number of blood oxygen parameters continuously lower than the blood oxygen index, F is a preset sampling frequency, vnIs a blood oxygen parameter below the blood oxygen index.
In a preferred embodiment of the invention, the evaluation module is further configured to:
calculating a first ratio of the integrated area to the persistent region area; wherein, the area of the continuous region is the product of the blood oxygen index and the duration of the oxygen desaturation event;
the severity of the oxygen desaturation event is evaluated according to a first ratio.
In a preferred embodiment of the invention, the evaluation module evaluates the severity of the oxygen desaturation event according to the following method:
detecting whether the first ratio belongs to a preset interval or not;
if yes, evaluating the oxygen desaturation event according to the severity level corresponding to the preset interval;
or,
comparing the first ratio with ratios corresponding to other oxygen desaturation events; wherein the greater the ratio, the more severe the corresponding oxygen desaturation event.
In a preferred embodiment of the present invention, if more than one oxygen desaturation event occurs during the sleep time, the evaluation module is further configured to:
calculating the total integral area of the more than one oxygen desaturation event, wherein the total integral area is the sum of integral areas corresponding to the more than one oxygen desaturation event;
calculating a second ratio of the total integrated area to the area of the sleep time zone; wherein, the area of the sleep time region is the product of the blood oxygen index and the sleep time;
the overall severity of more than one oxygen desaturation event is evaluated according to a second ratio.
Thus, in the embodiment of the present invention, a plurality of blood oxygen parameters sampled at a predetermined sampling frequency are obtained; if two or more continuous blood oxygen parameters lower than the blood oxygen index exist, determining that an oxygen desaturation event occurs; acquiring an integral area corresponding to an oxygen desaturation event according to two or more blood oxygen parameters lower than the blood oxygen index and a preset sampling frequency; and evaluating the severity of the oxygen desaturation event according to the integral area, so that the accuracy of the severity of the oxygen desaturation event can be improved, and the comprehensiveness, reliability and accuracy of an evaluation result are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a flow chart of an evaluation method of the present invention;
FIG. 2 is a schematic diagram of an oxygen desaturation measurement curve in an embodiment of the present invention;
FIG. 3 is a flow chart of the steps of an evaluation method of the present invention;
FIG. 4 is a graph illustrating an oxygen desaturation measurement curve in an embodiment of the present invention;
FIG. 5 is a graph illustrating an oxygen desaturation measurement curve in an embodiment of the present invention;
fig. 6 is a block diagram of an evaluation apparatus of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a flow chart of an evaluation method in an embodiment of the invention is shown.
Step 101, obtaining a plurality of blood oxygen parameters sampled at a predetermined sampling frequency.
Specifically, in the embodiment of the present invention, the sleep monitoring device samples the blood oxygen parameter at a predetermined sampling frequency during the sleep time of the user, and acquires the blood oxygen parameter corresponding to each sampling point.
In one embodiment of the invention, the sleep monitoring device may be a professional detection device. In one embodiment, the sleep monitoring device may be a combination of a sleep monitoring tool and a mobile terminal, wherein a sleep monitoring platform is installed in the mobile terminal, and the sleep monitoring platform is used for collecting blood oxygen parameters acquired by the sleep monitoring tool and analyzing and evaluating the blood oxygen parameters.
Step 102, if there are two or more continuous blood oxygen parameters lower than the blood oxygen index, it is determined that an oxygen desaturation event occurs.
Specifically, in the embodiment of the present invention, the sleep monitor device analyzes the obtained blood oxygen parameter, and in an embodiment of the present invention, in the analysis process, the blood oxygen parameter may be plotted as a graph, as shown in fig. 2, which is a schematic diagram of an oxygen desaturation measurement curve, in fig. 2: the x-axis represents time, and the Y-axis represents the blood oxygen saturation concentration value (i.e. the blood oxygen parameter in the embodiment of the present invention), wherein Y represents the blood oxygen indicator.
In an embodiment of the present invention, if there are two or more consecutive blood oxygen parameters below the blood oxygen indicator, it can be determined that an oxygen desaturation event occurs. As shown by the shaded portion in fig. 2, i.e., an oxygen desaturation event.
If only a single blood oxygen parameter below the blood oxygen indicator does not meet the oximetry event condition, it is not deemed an oximetry event.
Step 103, obtaining an integral area corresponding to the oxygen desaturation event according to two or more blood oxygen parameters lower than the blood oxygen index and a predetermined sampling frequency.
Specifically, in the embodiment of the present invention, the sleep monitor device calculates the integral area corresponding to each oxygen desaturation event according to the blood oxygen parameter corresponding to each oxygen desaturation event, that is, two or more blood oxygen parameters lower than the blood oxygen index continuously, and the predetermined sampling frequency. The specific calculation method will be described in detail in the following examples.
And 104, evaluating the severity of the oxygen desaturation event according to the integral area.
Specifically, in embodiments of the present invention, the sleep monitoring device may assess the severity of one or more oxygen desaturation events occurring during sleep time based on the integrated area of each oxygen desaturation event. The severity of the oxygen desaturation event is evaluated according to the integral area, and the duration and the descending amplitude of the event can be comprehensively evaluated, so that the accuracy and the comprehensiveness of the severity evaluation of the oxygen desaturation event can be improved.
In summary, in the technical solution of the embodiment of the present invention, a plurality of blood oxygen parameters sampled at a predetermined sampling frequency are obtained; if two or more continuous blood oxygen parameters lower than the blood oxygen index exist, determining that an oxygen desaturation event occurs; acquiring an integral area corresponding to an oxygen desaturation event according to two or more blood oxygen parameters lower than the blood oxygen index and a preset sampling frequency; the severity of the oxygen desaturation event was evaluated in terms of integrated area. Therefore, the accuracy of evaluating the severity of the oxygen desaturation event can be improved, and the comprehensiveness, reliability and accuracy of the evaluation result are improved.
In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description is given with specific examples.
Referring to fig. 3, a flowchart illustrating specific steps of an evaluation method according to an embodiment of the present invention is shown.
Step 301, obtaining a plurality of blood oxygen parameters sampled at a predetermined sampling frequency.
Specifically, in the embodiment of the present invention, the sleep monitoring device samples the blood oxygen parameter at a predetermined sampling frequency during the sleep time of the user, and acquires the blood oxygen parameter corresponding to each sampling point.
In one embodiment of the invention, the sleep monitoring device may be a professional detection device. In one embodiment, the sleep monitoring device may be a combination of a sleep monitoring tool and a mobile terminal, wherein a sleep monitoring platform is installed in the mobile terminal, and the sleep monitoring platform is used for collecting blood oxygen parameters acquired by the sleep monitoring tool and analyzing and evaluating the blood oxygen parameters.
In step 302, if there are two or more consecutive blood oxygen parameters below the blood oxygen index, it is determined that an oxygen desaturation event occurs.
Specifically, in the embodiment of the present invention, the sleep monitor device analyzes the obtained blood oxygen parameter, and in an embodiment of the present invention, in the analysis process, the blood oxygen parameter may be plotted as a graph, as shown in fig. 4, which is a schematic diagram of an oxygen desaturation measurement curve, in fig. 4: the x-axis represents time and the Y-axis represents blood oxygen saturation concentration (i.e. blood oxygen parameter in the embodiment of the present invention), wherein Y represents the blood oxygen index.
In an embodiment of the present invention, if there are two or more consecutive blood oxygen parameters below the blood oxygen indicator, it can be determined that an oxygen desaturation event occurs. As shown by the cross-hatched portion in fig. 4, i.e., an oxygen desaturation event.
Step 303, obtaining an integral area corresponding to the oxygen desaturation event according to two or more blood oxygen parameters lower than the blood oxygen index and a preset sampling frequency;
the integrated area is calculated according to the following formula:
wherein Y in the formula is a blood oxygen index, n is the number of blood oxygen parameters continuously lower than the blood oxygen index, F is a preset sampling frequency, vnIs a blood oxygen parameter below the blood oxygen index.
In step 304, the severity of the oxygen desaturation event is evaluated based on the integrated area.
In an embodiment of the present invention, step 304 specifically includes:
substep 3041: calculating a first ratio of the integrated area to the persistent region area; wherein the continuous area is the product of the blood oxygen indicator and the duration of the oxygen desaturation event.
Referring to fig. 4, in fig. 4:
the left cross-hatched portion is oxygen desaturation event 1, which corresponds to an integrated area of a1, and the right cross-hatched portion is oxygen desaturation event 2, which corresponds to an integrated area of a 2.
In fig. 4, the sustain area S1 corresponding to a1 is the sum of the left cross-hatched area a1 and the left diagonally hatched area M1, i.e., the product of the blood oxygen indicator Y and the oxygen desaturation event 1 duration. The oxygen desaturation event percentage (i.e., the first ratio in the present embodiment) corresponding to oxygen desaturation event 1 is:
P1＝A1/(A1+M1)×100％
the oxygen desaturation event percentage P2 and P1 corresponding to the oxygen desaturation event 2 are calculated in the same manner, and are not described herein again.
In order to make the calculation method of the first ratio in the embodiment of the present invention better understood, the following detailed description is given with reference to specific embodiments.
FIG. 5 is a schematic diagram of a blood oxygen parameter measurement curve according to an embodiment of the present invention. The figure shows the measurement results only within one hour, in fig. 5:
the y-axis is the blood oxygen saturation concentration and the x-axis is time. In the embodiment, the blood oxygen index Y is 99, that is, the blood oxygen saturation concentration (i.e. the blood oxygen parameter in the embodiment of the present invention) less than 99% belongs to the low blood oxygen parameter, wherein t3-t5More than two continuous blood oxygen parameters lower than the blood oxygen index, i.e. t, appear at any moment3-t5An oxygen desaturation event occurs. Also, in the present embodiment, the predetermined sampling frequency F is 60 times/min, and the time interval between each sampling point, i.e. the duration of each blood oxygen parameter, is: 1/F.
From step 303, the integral area formula is:
wherein Y in the formula is a blood oxygen index, n is the number of blood oxygen parameters continuously lower than the blood oxygen index, F is a preset sampling frequency, vnIs a blood oxygen parameter below the blood oxygen index.
Then the process of the first step is carried out,
in this embodiment, Y is 99, n is 3, and F is 60.
That is to say that the first and second electrodes,
wherein v is1＝97,v2＝93,v3＝94。
Thus, P1 ═ 4.38%
Substep 3042: the severity of the oxygen desaturation event is evaluated according to a first ratio.
In one embodiment of the present invention, the evaluation method may be: detecting whether the first ratio belongs to a preset interval or not; if so, the oxygen desaturation event is evaluated according to the severity level corresponding to the predetermined interval.
Specifically, the operator may set two or more predetermined intervals, and set the severity level corresponding to each predetermined interval. For example: the severity level corresponding to (0, 3% ] is mild (3%, 5% ] is moderate, and the severity level corresponding to more than 5% is severe.
In another embodiment of the present invention, the evaluation method may further include: comparing the first ratio with ratios corresponding to other oxygen desaturation events; wherein the greater the ratio, the more severe the corresponding oxygen desaturation event.
Specifically, and still taking fig. 4 as an example, if P1> P2, then it may be determined that the severity of oxygen desaturation event 1 is greater than the severity of oxygen desaturation event 2.
The overall severity of the oxygen desaturation event is evaluated based on the integrated area, step 305.
Specifically, in the embodiment of the present invention, if more than one oxygen desaturation event occurs within the sleep time, the sleep monitoring device may evaluate the overall severity of all oxygen desaturation events occurring within the sleep time, so as to evaluate the sleep quality corresponding to the current sleep time.
In an embodiment of the present invention, step 305 specifically includes:
and a substep 3051, calculating a total integral area of the more than one oxygen desaturation event occurring within the sleep time, wherein the total integral area is a sum of integral areas corresponding to the more than one oxygen desaturation event.
Specifically, as shown in step 303, the integral area formula is:
the total integrated area of the oxygen desaturation events is then:
wherein m is the occurrence number of oxygen desaturation events.
A substep 3052 of calculating a second ratio of the total integrated area to the area of the sleep time zone; wherein, the area of the sleep time region is the product of the blood oxygen index and the sleep time.
Specifically, in the embodiment of the present invention, the second ratio of the total integrated area to the sleep time region area is a ratio between the total integrated area of the oxygen desaturation area and the blood oxygen index and the region area of the time axis enclosure.
Specifically, the second ratio calculation formula of the total integrated area to the sleep time region area is as follows:
where TST is the total sleep time.
And a substep 3053 of evaluating the overall severity of the more than one oxygen desaturation event based on the second ratio.
In particular, in embodiments of the present invention, the method of assessing sleep quality (i.e., the overall severity of an oxygen desaturation event in embodiments of the present invention) may be similar to the method of assessing the severity of a single oxygen desaturation event. That is, the sleep quality can be evaluated by setting a preset interval. In another embodiment, sleep quality may also be detected by comparing multiple measurements. For example: the corresponding ratio measured on the first day was P1 and the corresponding ratio measured on the second day was P2, and if P1> P2, it was determined that the oxygen desaturation event occurred more severely on the first day, i.e., the quality of sleep was lower than on the second day. The operator can set the evaluation method according to the actual requirement, which is not limited in the present invention.
In addition, in an embodiment of the present invention, the sleep monitor device may further display a measurement curve drawn according to the obtained blood oxygen parameter in a screen, and display the evaluation result. The specific display mode can be set by an operator, and the invention is not limited to this.
It should be noted that the numerical values listed in the embodiments of the present invention are only for better understanding of the present invention, and the operator may set the numerical values such as the blood oxygen index according to the actual requirement, which is not limited by the present invention.
In summary, in the technical solution of the embodiment of the present invention, a plurality of blood oxygen parameters sampled at a predetermined sampling frequency are obtained; if two or more continuous blood oxygen parameters lower than the blood oxygen index exist, determining that an oxygen desaturation event occurs; acquiring an integral area corresponding to an oxygen desaturation event according to two or more blood oxygen parameters lower than the blood oxygen index and a preset sampling frequency; the severity of the oxygen desaturation event was evaluated in terms of integrated area. Therefore, the accuracy of evaluating the severity of the oxygen desaturation event can be improved, and the comprehensiveness, reliability and accuracy of the evaluation result are improved.
Based on the same inventive concept as the method, the embodiment of the invention also provides an evaluation device. The evaluation device may be implemented by software, or by hardware, or by a combination of hardware and software. Taking a software implementation as an example, as a logical means, the device is formed by reading corresponding computer program instructions in the nonvolatile memory through the processor of the routing device where the device is located. In terms of hardware, besides the processor and the nonvolatile memory, the routing device may also include other hardware, such as a forwarding chip, a network interface, and a memory, which are responsible for processing packets; in terms of hardware structure, the routing device may also be a distributed device, and may include a plurality of interface cards, so as to perform packet processing extension at a hardware level.
Referring to fig. 6, a block diagram of an embodiment of the evaluation apparatus of the present invention is shown, which may specifically include the following modules:
the first obtaining module 601 is configured to obtain a plurality of blood oxygen parameters sampled at a predetermined sampling frequency.
A determining module 602, configured to determine that an oxygen desaturation event occurs if there are two or more consecutive blood oxygen parameters that are lower than the blood oxygen indicator.
The second obtaining module 603 is configured to obtain an integrated area corresponding to an oxygen desaturation event according to two or more blood oxygen parameters lower than the blood oxygen indicator and a predetermined sampling frequency.
An evaluation module 604 for evaluating a severity of the oxygen desaturation event in terms of an integrated area.
In a preferred embodiment of the present invention, the second obtaining module 603 may be further configured to calculate the integrated area according to the following formula:
wherein Y in the formula is a blood oxygen index, n is the number of blood oxygen parameters continuously lower than the blood oxygen index, F is a preset sampling frequency, vnIs a blood oxygen parameter below the blood oxygen index.
In a preferred embodiment of the present invention, the evaluation module 604 may be further configured to:
calculating a first ratio of the integrated area to the persistent region area; wherein, the area of the continuous region is the product of the blood oxygen index and the duration of the oxygen desaturation event;
the severity of the oxygen desaturation event is evaluated according to a first ratio.
In a preferred embodiment of the present invention, the evaluation module 604 may evaluate the severity of an oxygen desaturation event according to the following method:
detecting whether the first ratio belongs to a preset interval or not;
if yes, evaluating the oxygen desaturation event according to the severity level corresponding to the preset interval;
or,
comparing the first ratio with ratios corresponding to other oxygen desaturation events; wherein the greater the ratio, the more severe the corresponding oxygen desaturation event.
In a preferred embodiment of the present invention, if more than one oxygen desaturation event occurs during the sleep time, the evaluation module 604 is further configured to:
calculating the total integral area of the more than one oxygen desaturation event, wherein the total integral area is the sum of integral areas corresponding to the more than one oxygen desaturation event;
calculating a second ratio of the total integrated area to the area of the sleep time zone; wherein, the area of the sleep time region is the product of the blood oxygen index and the sleep time;
the overall severity of more than one oxygen desaturation event is evaluated according to a second ratio.
In summary, in the technical solution of the embodiment of the present invention, a plurality of blood oxygen parameters sampled at a predetermined sampling frequency are obtained; if two or more continuous blood oxygen parameters lower than the blood oxygen index exist, determining that an oxygen desaturation event occurs; acquiring an integral area corresponding to an oxygen desaturation event according to two or more blood oxygen parameters lower than the blood oxygen index and a preset sampling frequency; the severity of the oxygen desaturation event was evaluated in terms of integrated area. Therefore, the accuracy of the severity of the oxygen desaturation event can be improved, and the comprehensiveness, reliability and accuracy of the evaluation result are improved.
For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The above detailed description is provided for an evaluation method and apparatus provided by the present invention, and the principle and the implementation of the present invention are explained by applying specific examples, and the description of the above examples is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. An evaluation method, comprising:
acquiring a plurality of blood oxygen parameters sampled at a preset sampling frequency;
if two or more continuous blood oxygen parameters lower than the blood oxygen index exist, determining that an oxygen desaturation event occurs;
acquiring an integral area corresponding to the oxygen desaturation event according to the two or more blood oxygen parameters lower than the blood oxygen index and the preset sampling frequency;
evaluating the severity of the oxygen desaturation event as a function of the integrated area.
2. The method of claim 1, wherein the step of obtaining the integrated area corresponding to the oxygen desaturation event according to the two or more blood oxygen parameters lower than the blood oxygen index and the predetermined sampling frequency comprises:
the integrated area is calculated according to the following formula:
wherein Y in the formula is the blood oxygen index, n is the number of blood oxygen parameters continuously lower than the blood oxygen index, F is the predetermined sampling frequency, vnIs a blood oxygen parameter below the blood oxygen indicator.
3. The method of claim 1, wherein said step of assessing the severity of said oxygen desaturation event based on said integrated area comprises:
calculating a first ratio of the integrated area to the persistent region area; wherein the sustained region area is the product of the blood oxygen indicator and the oxygen desaturation event duration;
evaluating a severity of the oxygen desaturation event based on the first ratio.
4. The method of claim 3, wherein the severity of the oxygen desaturation event is assessed as follows:
detecting whether the first ratio belongs to a preset interval or not;
if so, evaluating the oxygen desaturation event according to the severity level corresponding to the preset interval;
or,
comparing the first ratio with ratios corresponding to other oxygen desaturation events; wherein the greater the ratio, the more severe the corresponding oxygen desaturation event.
5. The method of claim 1, wherein if more than one oxygen desaturation event occurs during sleep time, the method further comprises:
calculating the total integral area of the more than one oxygen desaturation events, wherein the total integral area is the sum of integral areas corresponding to the more than one oxygen desaturation events;
calculating a second ratio of the total integrated area to the area of the sleep time zone; wherein the sleep time zone area is the product of the blood oxygen indicator and the sleep time;
evaluating the overall severity of the more than one oxygen desaturation event in accordance with the second ratio.
6. An evaluation device, comprising:
the first acquisition module is used for acquiring a plurality of blood oxygen parameters sampled at a preset sampling frequency;
the determining module is used for determining that an oxygen desaturation event occurs if two or more continuous blood oxygen parameters lower than the blood oxygen index exist;
the second acquisition module is used for acquiring the integral area corresponding to the oxygen desaturation event according to the two or more blood oxygen parameters lower than the blood oxygen index and the preset sampling frequency;
an evaluation module to evaluate a severity of the oxygen desaturation event as a function of the integrated area.
7. The apparatus of claim 6, wherein the second obtaining module is further configured to calculate the integrated area according to the following formula:
wherein Y in the formula is the blood oxygen index, n is the number of blood oxygen parameters continuously lower than the blood oxygen index, F is the predetermined sampling frequency, vnIs a blood oxygen parameter below the blood oxygen indicator.
8. The apparatus of claim 6, wherein the evaluation module is further configured to:
calculating a first ratio of the integrated area to the persistent region area; wherein the sustained region area is the product of the blood oxygen indicator and the oxygen desaturation event duration;
evaluating a severity of the oxygen desaturation event based on the first ratio.
9. The apparatus of claim 8, wherein the evaluation module evaluates the severity of the oxygen desaturation event according to the following method:
detecting whether the first ratio belongs to a preset interval or not;
if so, evaluating the oxygen desaturation event according to the severity level corresponding to the preset interval;
or,
comparing the first ratio with ratios corresponding to other oxygen desaturation events; wherein the greater the ratio, the more severe the corresponding oxygen desaturation event.
10. The apparatus of claim 6, wherein if more than one oxygen desaturation event occurs during sleep time, the evaluation module is further configured to:
calculating the total integral area of the more than one oxygen desaturation events, wherein the total integral area is the sum of integral areas corresponding to the more than one oxygen desaturation events;
calculating a second ratio of the total integrated area to the area of the sleep time zone; wherein the sleep time zone area is the product of the blood oxygen indicator and the sleep time;
evaluating the overall severity of the more than one oxygen desaturation event in accordance with the second ratio.
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