JP3059985B2 - Judgment method by automatic analysis of patient condition based on changes in arterial oxygen saturation measurement and pulse measurement - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a home care patient who is receiving home oxygen therapy, so that the hospital can immediately grasp the arterial oxygen saturation (SpO2) and pulse value measured by the patient. The present invention relates to a method for automatically analyzing a situation in which data such as the above-mentioned SpO2 value changes using a computer to which a value is input so that the condition of the home-care patient can be determined without a dedicated operator.

[0002]

2. Description of the Related Art Patients who have difficulty in ventilating the oxygen transport system of the human body, that is, the lungs, respiratory organs, or the brain, nerves, and airways are continuously treated at home. Home oxygen therapy (HOT) is known. In such a case, the arterial blood oxygen saturation (SpO2) of the home care patient, that is, the amount of oxygen combined with hemoglobin in arterial blood, the oxygen capacity of the blood (O2)
The physician must keep track of this percentage and the pulse rate. However, in the past, outpatient care was provided once or twice a month to home care patients, and a blood gas test was performed at this time to measure the changing SpO2 and pulse value as described above. By means, it was not possible to grasp the condition during the outpatient days, and the condition of the conventional medical treatment patient could suddenly change within a few days.

[0003] In order to solve such difficulties,
A pulse oximeter that can easily measure SpO2 and pulse has already been prepared in the home of a home-care patient, and the measured value data measured by the patient itself is transmitted to a computer at the hospital of the attending physician using a telephone line. Things to do are also being developed. However, even with the above-described means, even if the SpO2 value and the pulse value are input to the computer, based on these transmission data,
In order to judge the condition of the patient, it is necessary that the dedicated operator is always on standby, and even if such an operator is attached, when there is a subtle change in the measurement data, etc. This makes it difficult for the operator to judge the condition of the patient.

[0004]

DISCLOSURE OF THE INVENTION In view of the above-mentioned conventional problems, the present invention requires that the SpO2 value and the pulse value of the home-care patient have individual differences in their average level and variation, and that the patient's condition deteriorates. (1) SpO2 value sharply decreases,
(2) Sudden increase in pulse value, (3) Slow decrease in SpO2 value, and (4) Slow increase in pulse value are divided into four patterns. The above (1) and (2) are general statistics processing
踏E that it is automatically analyzed by, in the claim 1, intended to in intended to determine a gradual lowering of SpO2 in aforementioned (3), determine the mean and variance of the S pO2 value It should be noted that this is in the predetermined recent pre-period period which is slightly before the judgment date of the transmission SpO2 value. Using the beginning of the immediately preceding period as the origin of the time axis, the Y-intercept and the slope are obtained by the least squares method for all SpO2 value data during the period. Then, assuming that the slope is negative and the significance of the slope is confirmed by the test of the slope, the inequality determination formula of average−parameter × deviation> slope × number of days in the immediately preceding period + Y intercept is satisfied. The computer automatically performs an automatic analysis to judge that there has been a gradual decrease in the SpO2 value.
With this, all SpO2 value data without dedicated operator
Changes in medical treatment, and make sure that
Immediately determine the condition and allow the physician to respond promptly
That is the purpose.

[0005] In the case of claim 2 , the above (4)
Pulse value is about to determine that it has slowly increased, determine the mean and variance of the pulse rate value is in the pulse values all data shortly before the predetermined recent previous periods than the determination date of the transmission pulse value exactly as the origin of the time axis beginning with no predetermined immediately preceding period of superimposing, thereby obtaining the Y intercept and the slope at the least-squares method with respect to pulse rate value all the data and further the predetermined recent period before. Then, when the slope is positive and the significance is approved, the pulse rate is satisfied by satisfying the condition represented by the average + parameter × deviation <slope × number of days in the immediately preceding predetermined period + Y intercept, as before. It is determined that there has been a gradual increase in the value, and this is intended to achieve the same purpose as set forth in claim 1 above.

[0006]

The present invention achieves the above objects.
Therefore, in the determination method according to the first aspect , the home-care patient receiving home oxygen therapy is required to have his or her own arterial blood oxygen saturation (SpO2) measured by a pulse oximeter.
) Is continuously transmitted to the computer at the required location, and the above-mentioned computer calculates the average and deviation of all data of the SpO2 value in the predetermined recent preceding period, and calculates the average and the deviation of the transmitted SpO2 value. An average ± Pe × deviation using Pe = 2 to 3 as a parameter is obtained from the deviation, and the SpO is set within the range of the average ± Pe × deviation.
If all of the binary data are included, the average and the deviation are adopted at the time of determination described later. If the data of the SpO2 value includes data that is not within the range of the average ± Pe × deviation, Until the data is no longer included, the Sp
The correction average and the correction deviation of the SpO2 value data excluding the O2 value are obtained, and the correction average and the correction deviation are adopted at the time of the determination described later. With the beginning of the predetermined immediately preceding period as the origin of the time axis, the Y intercept and the slope are obtained by the least squares method for all SpO2 values over the immediately preceding predetermined period, and if this slope is positive, the SpO2 value does not have a gradual downward tendency. When the above slope is negative, a test of the significance is performed for the slope, and when the result is not significant, it is determined that the SpO2 value has no gentle downward tendency, When the result is significant, the above mean or corrected mean and deviation or corrected deviation and Y intercept and slope are adopted, and Pf = 2 to 3 are used as parameters.
Average or corrected average−Pf × deviation or correction deviation> slope × number of days in the immediately preceding period + Y intercept If the inequality determination formula does not hold, it is determined that the SpO2 value does not have a gradual downward trend, and the inequality determination formula is used. Is satisfied, it is determined that the SpO2 value is on a gradual decrease.

Furthermore, home care patients In the determination method of receiving home oxygen therapy according to claim 2, the self-pulsation values measured by the pulse oximeter, continuously to transmit to the computer in the required position With respect to the transmission pulse value, the computer calculates the average and the deviation of all the pulse value data in the predetermined recent period,
From these averages and deviations, an average ± Pg × deviation using Pg = 2 to 3 as a parameter is obtained. If all the pulse value data are included in the range of the average ± Pg × deviation, When the average and the deviation are adopted at the time of determination described later, and the above-mentioned pulse value total data includes data that is not within the range of the average ± Pg × deviation, the pulse value excluding the pulse value is excluded until the data is not included. The correction average and the correction deviation of the value data are obtained, and the correction average and the correction deviation are adopted at the time of determination, which will be described later, while the start of the predetermined immediately preceding period and the immediately preceding predetermined period before the determination date. With the origin of the time axis as the origin of the time axis, the Y intercept and the slope are obtained by the least squares method for all the pulse values over the immediately preceding period, and if this slope is negative, it is determined that the pulse value has no gradual upward tendency, Is positive When, for the slope,
A test of the significance is performed. If the result is not significant, it is determined that the pulse value does not have a gradual upward trend. If the result is significant, the deviation from the above-mentioned average or the corrected average is obtained. Alternatively, a correction average and a Y intercept and a slope are adopted, and, using Ph = 2 to 3 as a parameter, an inequality determination formula of the average or the correction average + Ph × the deviation or the correction deviation <the inclination × the number of days in the immediately preceding predetermined period + Y intercept is established. If not, it is determined that the pulse value does not have a gradual increase tendency, and if the inequality determination formula is satisfied, it is determined that the pulse value is in a gradual increase.

[0008]

Determination method according to the embodiment of the present invention may be performed using a transmission apparatus example such illustrated in FIG. 1, in the illustrated example, in the home care patient C, the sensor On the output side of the pulse oximeter 1 which derived 1a,
A home transmission / reception device 3 is connected via a relay box 2, and an output side of the home transmission / reception device 3 and a telephone 4 are connected to a telephone line 5 by a connector 4a. 1 in the figure
b and 1c denote a display unit and a power switch of the pulse oximeter 1, respectively, and 2a and 2b denote a transmission switch and a measurement pilot lamp of the relay box 2, respectively.

[0009] In addition, the telephone line 5 in the case of the illustrated example,
Hospital transmitting / receiving device 6 installed on the hospital side H where the attending physician is located
, The output side of which is connected to a computer 7, in which 8 denotes a printer connected to the computer 7, and 9 denotes a sound or light alarm connected to the output side of the computer 7. ing.

[0010] Therefore, home care patients, known as, for example, morning, noon, and night after a meal, is fitted a finger on the sensor 1a, supra pulse oximeter 1 at rest several times a day, SpO
2 and the pulse are measured. At this time, the display unit 1b
When the value displayed in is stable, the relay box 2
When the transmission switch 2a is closed, the measurement pilot lamp 2b is turned on, and the SpO2 value and the pulse value for the specified number of seconds are recorded in the home transceiver 3, and when the specified number of seconds elapses, the measurement pilot lamp 2b Is turned off, the measurement completion is notified to the subject, and the finger is removed from the sensor 1a to complete the measurement.

[0011] Next, the home transceiver device 3, automatically turning the telephone number of the hospital H, by the telephone line 5 to measure data described above, the computer 7 via the hospital transceiver device 6 Will be sent. At this time, the computer 7 is always installed in a nurse station or the like where a person is present, and the computer 7 performs an automatic analysis on the measurement value data of the present invention described in detail below. , As described above
If it is determined that there is a specific change in the O2 value and the pulse value, the change in the measured value data is notified to the attending physician or nurse by visual observation of the computer 7 itself or by an alarm of the alarm 9 shown in the drawing. Become.

When the present invention is carried out as described above, the attending physician or the like who has actually confirmed the alarm immediately asks the patient by telephone for the specific change in the measured value data. By doing so, the condition is grasped in detail, and if necessary, an emergency visit is instructed to perform a detailed examination at the hospital or an emergency hospitalization.

[0013] Of course, the present invention is not only carried out as described above, a device having a such data analysis capabilities of the computer, by mounting before the home transceiver device 3,
Only when it is determined that the measured value data has changed by the data analysis, the fact is transmitted to the hospital side. Otherwise, the measured value data is transmitted to the hospital side only once a week, for example. The present invention may be put to practical use in an embodiment such as transmission.

In such a case, an alarm is actually issued by the home transmission / reception device, the patient is continuously measured for the SpO2 value and the pulse value, and the sampling number is increased. It becomes possible to quickly determine whether the change in the measured value data is a temporary one such as a mistake in the oxygen inhalation amount or a measurement at rest, and the accuracy of the determination by the automatic analysis according to the present invention is improved. It can be improved further.

[0015] Therefore, when Setsuji per gradual descent method for determining the SpO2 value according to claim 1, wherein Importantly, FIG. 2, as an example thereof is disclosed, the determination roughly It comprises an average and deviation calculation procedure to be used, a linear approximation equation calculation procedure by the least squares method, and a determination procedure using the former procedure result and the latter procedure result. And the important point is
As described above, since it is impossible to make a determination ignoring the presence of individual differences, the individual differences in plainness can be calculated based on the recent individual differences without simply using the slope of a straight-line approximation of all SpO2 value data as the determination standard. The SpO2 value is expressed by the average and deviation of all the SpO2 values, and the transmitted SpO2 value is subjected to a linear approximation by the least squares method. Is trying to determine with high accuracy whether or not there is a gradual fall of.

[0016] Importantly In the first aspect as evidenced by FIG. 2, first, a predetermined recent period before calculating the average and variance representing the individual difference P1 (see FIG. 3), a linear approximation of the The predetermined immediately preceding period P2 (see FIG. 3 ) is divided into independent periods that do not overlap each other. That is, in the embodiment shown in the first step of FIG. 2, S
2 days from 8 days before including the judgment date for the change in pO2 value
As shown in FIG. 3 , the 14 days before one day is divided into a predetermined previous period P
1 and calculate the average and deviation of all the SpO2 values at P1. On the other hand, the Y intercept A and the slope shown in FIG. 3 of the linear approximation equation shown as the sixth step in FIG. As the predetermined immediately preceding period P2 for obtaining B, the origin of the time axis is defined as seven days before the determination date.
As described above, the Y intercept A and the slope B are obtained by the least squares method for all the SpO2 value data at P2.

The reason why the predetermined pre-recent period P1 and the immediately preceding predetermined period P2 are separated is that the period for calculating the individual difference at normal time is affected by the influence of measured value data in the period approximating a straight line. In particular, when the measured value data that approximates a straight line indicates a downward or upward trend, the period that approximates the straight line is selected for the calculation of the individual difference. This is because if included in the period, the above average level will fluctuate up and down and the deviation will increase, and it will not be possible to calculate the correct individual difference at normal times.

[0018] Now, if to obtain an average and a deviation by a first step in Figure 2 and as described above, as in claim 1, in the the second step was Setsuji in claim 1 above, the From the average and the deviation, Pe ± 2 × 3 is used as a parameter to find the average ± Pe × deviation. And
Further, as understood from the third, fourth, and fifth steps, when all the SpO2 value data in the first step are included in the above-mentioned range of the average ± Pe deviation, as in the case of the first aspect. Expresses the average and the deviation in the fifth step,
It will be adopted in the later tenth step. On the other hand, if there is SpO2 value data that is not included in the above-mentioned average ± Pe × deviation, it is excluded to calculate the correction average and the correction deviation, and the results are used in the tenth step as described later. Becomes

Meanwhile the calculation of the linear approximate expression above, Figure 2 as will be appreciated by explicit Figure 3 as a sixth step, Y intercept A and inclination by least squares method based on the SpO2 value all the data in a predetermined immediately preceding period P2 B is required,
If the slope B is positive, it is determined in the ninth step that the SpO2 value does not have a gradual downward trend, and if it is detected that the slope B is negative, it is determined in the eighth step that For the purpose of examination, a test of significance is performed. When 0 is included in the test reference range, it is judged that there is no significance, and it is determined that a gradual decrease in the SpO2 value has not occurred in the ninth step.

[0020] Here, the test of the significance may be performed by known means, but if Setsuji by Figure 4 this, the setting by the first procedure, determine the Sb value of the second procedure And the inclination ± t of the third procedure.
By detecting whether or not 0 is included in the range of 0.05 × Sb, it is determined whether or not there is significance.

[0021] Then In the tenth step, supra Figure 2, S
The average of −Pf × deviation using Pf = 2 to 3 as a parameter as an equation for judging a slow decrease of the pO2 value is compared with the slope B × the number of days (7 days) of the immediately preceding period P2 + Y intercept A, and the average is −Pf If the condition of × deviation> slope × number of days immediately before predetermined period + Y intercept is not satisfied, it is determined that the SpO2 measurement value does not decrease slowly, and it is determined that the above-described gentle decrease exists when the condition is satisfied. You do it.

[0022] Incidentally, although Setsuji in detail In the Examples section later in this case, the pulse value SpO2 values all data Figure 5 is according to claim 1, and Figure 7 is according to claim 4 of the following theory a table showing all data, SpO Table 1 corresponds to FIG. 5
Table 2 is a list of all pulse value data corresponding to FIG. 7 as well.

Furthermore, although Setsuji per gradual rise method of determining the pulse values according to claim 2, the basic concept is the same as in the case of supra Claim 1, one 6 for the contents An example is shown. That is, 14 days from 8 days to 21 days before the determination date are also selected as the predetermined recent preceding period, and the average and the deviation are obtained for all the pulse value data during this period, thereby obtaining Pg = Average ± Pg × = 2 to 3 as parameters
Knowing the deviation ends the first and second steps.

Furthermore, second, third, fourth, substantially the same procedure as in claim 1 also the fifth step is performed,
If all the pulse value data described above are included in the range of the average ± Pg × deviation, the average and the deviation at that time are adopted as it is, and when there is the pulse value all data outside the above range,
The correction average and the correction deviation calculated after excluding this will be used.

Further, as the procedure for determining the calculation of linear approximation, and than sixth to eleventh step is adopted, also in the same manner as in the case of FIG. 2, the front 7 days including the determination date given As the immediately preceding period, the beginning is defined as the origin of the time axis, and the Y intercept and the slope are obtained by the least squares method for all the pulse value data in this period. In this case, when the slope is negative, the pulse value Is judged to have no gradual upward trend, and if the slope is positive, a test of significance is performed. If there is no significance, it is determined that there is no gradual increase as described above in the ninth step. I do.

In the above case, if the significance of the slope is approved, the tenth step and the eleventh step are performed as shown in FIG.
= 2 to 3 as parameters, and based on the same concept as described in claim 1 , the average + Ph × deviation <slope +
Unless the condition of the number of days in the predetermined immediately preceding period + Y intercept is satisfied, the pulse value does not rise slowly, and if the condition is satisfied, it is determined that the pulse value is rising slowly.

[0027] Here, the selection of the above-mentioned predetermined recent period before a predetermined period immediately preceding, both of claims 1 and claim 2, not limited to the illustrated example, home care patients Dear former In this case, it is sufficient to select a period in which the condition is reflected, and even in the latter case, it is considered desirable that the number of measured value data to be linearly approximated is 10 or more. If, as mentioned above, 7
Instead of days, it may be less.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to deepen the understanding of the judgment method according to the present invention, the analysis of measured value data will be described with specific examples in each of claims 1 and 2 below. First , the claim
A specific example of the method for determining that the SpO2 value of FIG. 1 has a gradual downward trend will be described in detail below with reference to FIGS. 2 and 5 and Table 1 below. May 1 in Table 1
No. on day 0. When the transmission SpO2 value of the computer 58 is input to the computer 7, first, 14 days from 8 days before to May 21 including May 10, ie, all data of the SpO2 value from April 20 to May 3 ( No. 1 to N
o. 39), the average and the deviation are obtained. The average is 89.6% and the deviation is 1.01%. Here, all the measured value data (No. 1 to No. 39) used for the calculation are 89.6%. % ± 3 × 1.
When it was checked whether or not they were included in the range of 01% (Pg = 3), all of them were included in the range. Therefore, the above average and deviation were used for the determination in the tenth step.

[0029]

[Table 1]

[0030] Next, May up to 7 days before, including the 10 days, that is, SpO2 value of the May 4th to May 10 days for all the data (No.40~No.58), 5 May 4, When the measurement time is converted by setting 0:00 of the time axis as the origin of the time axis and the unit as days, for example, Since the time to the measured value data of 45 is 1.825 days, the Y intercept and the slope obtained by the least squares method are 89.9% of the Y intercept and the slope is −0.164. Therefore, since this slope is negative, this gives the following 95% confidence interval for the slope:
The above Sb is Sb = 0.216, and the number of data NS = 19 (No. 40 to No. 5).
According to 8), the value of the significant point of the t-distribution of 19-2 = 0.05 is 2.110, and the 95% confidence interval is −0.164 ± 2.110 × 0.216.

[0031] Therefore, the above section will contain 0, because it tests that there is no significance in the eighth step of FIG. 2, a determination is made of no gradual downward trend of the SpO2 values. When the transmitted SpO2 value on May 10 (No. 60) was transmitted to the computer 7, the average 89.6% deviation 1.101% Y intercept 90.6% slope -0.474 95% Confidence interval −0.474 ± 2.093 ×
Since this section does not include 0, the success or failure of the inequality expression was calculated based on the tenth step. 89.6%-2 x 1.101% = 87.4%> -0.474 x 7 + 90.6%
= 87.3%, it was determined that the SpO2 value had a gradual downward trend, and the alarm 9 reported an alarm.

In the same procedure as described above, No. 61-N
o. If the determination of No. 66 is made, 61, no. 62, N
o. 63, no. 64, and no. 66 is S
It is determined that the pO2 value is on a gradual decrease, and an alarm or the like is issued. 65 means that the slope is not significant.

[0033] Next, when determining a gradual increase in pulse rate values, i.e. every embodiment according to claim 2, 6, 7
This will be described below with reference to Table 2 below.

[0034]

[Table 2]

[0035] Now, No. in the above Table 2 in July 24
When the 79 pulse value data is transmitted to the computer 7, first, 14 days from 8 days before and including July 24 to 21 days before, that is, the pulse values from July 4 to July 17 The average and the deviation of the data (No. 1 to No. 55) are determined, whereby the average 92.7% and the deviation 3.83% are calculated, and the above No. used in this calculation is calculated. 1 to No. 5
It was checked whether all the data of No. 5 were within the range of 92.7% ± 3 × 3.83%. As a result, since all the data were included in the range, the above average and deviation were calculated. , Will be used for the determination described later.

[0036] Then, before 7 days, including the July 24, ie pulse value all the data of July 18 to July 24 days (N
o. 56-No. In contrast to the case of No. 79), the measurement time is converted with 0:00 on July 18 as the origin of the time axis and the unit as day. Since the time to the measured value data of 60 is 1.222 days, when the Y intercept and the slope are obtained by the least squares method, the Y intercept of 91.6% slope 0.288 is obtained. Therefore, since this slope is positive, the following eighth step is performed, and the slope of 95
%, The Sb is Sb = 0.503, and the number of data NS24 (No. 56 to No. 79)
Thus, the value of the significance point of the t-distribution of 24-2 = 0.05 is
2.074, the 95% confidence interval is 0.288 ± 2.074 × 0.503, and since this interval contains 0, it can be tested as having no significance. Is determined not to be on a gradual rise.

[0037] In the same manner, of July 24, No. 80-N
o. 82, it is determined that no gradual increase is observed in all the pulse value data. 83
, Mean 92.8% deviation 3.748% Y intercept 90.5% slope 1.113 95% confidence interval 1.113 ± 2.074 × 0.
Since this is 526, this section is tested as significant without including 0, and the success or failure of the inequality discriminant is 92.8% + 2 × 3.748% = 100.3%> 1.113 × 7 + 90.5%
= 98.3%, so that it can be determined that all the pulse value data do not show a gradual increase. 84 and no.
Also in the judgment of 85, it is judged that there is significance but not a gradual increase.

[0038] In addition, the July 26 No. In case of 86, mean 92.9% deviation 3.834% Y intercept 90.1% slope 1.635 95% confidence interval 1.635 ± 2.080 × 0.
504, which is significant because this section does not include 0, so 92.9% + 2 × 3.834% = 100.6% <1.635 × 7 + 90.1%
= 101.5%, it is determined that there is a gradual rise in pulse value, and an alarm is sounded. Similarly, No. 87 and N
o. The judgment result of No. 88 is the same as that of No. 88 above. 8
As with 6, the alarm was issued.

[0039]

As described above, the present invention can be implemented as described above. For a home-care patient receiving home oxygen therapy, simply measure SpO2 value and pulse value which are transmitted periodically. In addition to being able to ascertain the condition of the patient by examining the data, in claim 1 the SpO2 value gradually decreases, and in claim 2 the pulse value gradually decreases in the measured data. Automatic analysis of each rise can be performed with high reliability, eliminating the need for an operator dedicated to analysis, eliminating the problem of superiority and erroneous operation of artificial analysis means, and quickly measuring values for anyone. The change in the data can be recognized by an alarm or the like, and the emergency response to the patient can be promptly performed.

[Brief description of the drawings]

FIG. 1 shows a measurement used to carry out the determination method according to the present invention .
FIG. 3 is a configuration explanatory diagram showing an example of a device for transmitting value data.

[Fig. 2] SpO2 value of home care patients
A flowchart showing an example of a method according to claim 1 for determining a descent.
It is a low chart.

FIG. 3 shows SpO2 value data according to claim 1 of the present application;
Of the slope obtained by calculating the linear approximation formula
It is explanatory drawing for demonstrating a fixed method.

FIG. 4 shows the significance of the slope in claims 1 and 2 of the present application .
It is a flowchart which showed the sex test procedure.

FIG. 5 is a trend graph showing data of SpO2 value and pulse value according to claim 1 of the present application.

[6] With regard to home care patient pulse value, the gradual rise
4 is a flowchart illustrating an example of a method according to claim 2 for determining the value of the parameter.

FIG. 7 shows pulse and SpO2 values according to claim 2 of the present application.
It is a trend graph showing data.

[Explanation of symbols]

 1 Pulse oximeter 7 Computer A Y intercept B Slope P1 Pre-specified near-term period P2 Pre-specified period

Claims (2)

(57) [Claims] [Claim 1] A home care patients undergoing home oxygen therapy, autologous arterial oxygen saturation measured by pulse oximeter to (SpO2 value), so as to continuously transmit to the computer at the required positions, the transmission With respect to the SpO2 value, the computer calculates the average and the deviation of all the SpO2 value data in the predetermined preceding period, and calculates the average ± Pe × deviation using Pe = 2 to 3 as a parameter from the average and the deviation. If all the data of the SpO2 values are included in the range of the average ± Pe * deviation, the average and the deviation are adopted at the time of determination described later,
If all the pO2 value data includes data that is not within the range of the average ± Pe deviation, a corrected average and a correction deviation of the SpO2 value data excluding the SpO2 value are obtained until the data is not included. The correction average and the correction deviation are adopted at the time of the determination described later, and the start of the predetermined immediately preceding period after the above-mentioned predetermined recent pre-period but before the determination date is used as the origin of the time axis, and the correction is performed over the predetermined immediately preceding period. For all SpO2 values, a Y intercept and a slope are obtained by the least squares method. If the slope is positive, it is determined that the SpO2 value does not have a gradual downward trend. If the slope is negative, the slope is determined. If the result is not significant, it is determined that the SpO2 value does not have a gradual downward trend, and if the result is significant, the average or the above-mentioned value is determined. The normal mean and the deviation or the correction deviation and the Y intercept and the slope are adopted, and Pf = 2 to 3 as parameters, and the average or the correction average−Pf × the deviation or the correction deviation> the slope × the number of days in the immediately preceding predetermined period + the Y intercept. When the equality determination formula does not hold, it is determined that the SpO2 value does not have a gradual downward trend, and when the inequality determination formula holds, it is determined that the SpO2 value has a gentle downward trend. The determination method by automatic analysis of the patient's condition based on the change in the measured arterial oxygen saturation. 2. A home-care patient receiving home oxygen therapy continuously transmits his or her own pulse value measured by a pulse oximeter to a computer at a required location. The computer calculates the average and the deviation of all the pulse value data in the predetermined previous period, and calculates Pg = 2 from the average and the deviation.
An average ± Pg × deviation with 3 as a parameter is obtained, and within the range of the average ± Pg × deviation,
If all of them are included, the average and the deviation are adopted at the time of determination described later. If all the pulse value data include data that is not in the range of average ± Pg × deviation, the data is not included until the data is not included. The correction average and the correction deviation of the pulse value data excluding the pulse value are obtained, and the correction average and the correction deviation are adopted at the time of the determination described later, while the determination is made after the above-mentioned predetermined recent preceding period. With the beginning of the predetermined immediately preceding period before the day as the origin of the time axis, the Y intercept and the slope are obtained by the least squares method with respect to all the pulse values over the predetermined immediately preceding period, and if this slope is negative, the pulse value is gradually reduced. It is determined that there is no upward tendency, and when the above slope is positive, a test of the significance is performed for the slope, and when the result is no significant, it is determined that the pulse value does not have a gentle upward tendency. The above conclusion When the result is significant, the above-mentioned mean or corrected mean and deviation or corrected mean and Y intercept and slope are adopted, and using Ph = 2 to 3 as a parameter, mean or corrected mean + Ph × deviation or correction When the inequality determination formula of deviation <slope × the number of days in the immediately preceding period + Y intercept is not satisfied, it is determined that the pulse value does not have a gradual upward tendency, and when the inequality determination formula is satisfied, the pulse value is moderate. A method for automatically analyzing a patient's condition based on a change in a pulse value, characterized in that the patient's condition is determined to be in a moderate rise.