JP2013118922A - Measuring apparatus and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To measure pulse waves corresponding to a level of a congestive state even without adjusting the quantity of light for one irradiation device.SOLUTION: A first irradiation section 17a and a second irradiation section 17b (irradiation sections 17) are disposed to irradiate a measurement portion to measure pulse waves with the determined quantity of light, respectively. A storage section 12 stores the irradiation sections 17 correspondingly to a level of congestion of blood. A measuring section 15 measures pulse waves using light transmitted through or reflected on the measurement portion irradiated with light. A control section 11 functions as a determination part 111 and determines the level of congestion in the measurement portion. Furthermore, the control section 11 functions as a selection part 112, selects the irradiation section 17 stored in the storage section 12 correspondingly to the level of congestion determined by the determination part 111 and causes the irradiation section 17 to be irradiated with light.

Description

  The present invention relates to a pulse wave measuring apparatus.

  There is a measuring device that measures a pulse wave as a medical measuring device that measures the circulatory function of a living body. The pulse wave is a change in blood pressure and volume in the peripheral vasculature accompanying the pulsation of the heart. A pressure pulse wave captures the pressure change in the blood vessel due to the pulse wave, and a capacitive pulse wave captures the volume change of the blood vessel. A measuring device that measures a capacitive pulse wave using light is called a photoelectric capacitive pulse wave measuring device. This principle is as follows.

  Blood hemoglobin has a strong absorption spectrum for light in a certain wavelength band. Since the transmitted light and reflected light of the living body when irradiated with light in this wavelength band change according to the amount of hemoglobin that changes with the volume fluctuation of the blood vessel, the intensity of the transmitted light and reflected light is changed to an electrical signal. It is possible to measure the pulse wave.

  By the way, when measuring the pulse wave of a living body, noise (hereinafter referred to as body motion noise) may occur in the measurement result due to the operation of the measurement site (hereinafter referred to as body motion). Body movement noise occurs because the pressure / decompression state of the measurement site, the positional relationship between the light emitting element / light receiving element and the living body, etc. change due to body movement and affect the direction and amount of reflected light to be measured. As a technique for reducing body motion noise, Patent Document 1 discloses a pulse wave sensor having a structure that avoids a blood congestion state.

JP 2002-224064 A

  However, in the pressure pulse wave sensor disclosed in Patent Document 1, when the posture of hanging the arm including the measurement site is continued for a long time, the blood is prevented from staying around the measurement site due to gravity and becoming congested. There is a problem that can not be.

  On the other hand, when it is determined that the blood is congested, it is also conceivable to increase the amount of light emitted from the irradiation device by increasing the power supplied to the irradiation device. However, in this case, there is a problem that feedback control is necessary for adjusting the amount of light and it is difficult to simplify the circuit, and the circuit itself generates noise, so that the noise must be removed.

  An object of the present invention is to measure a pulse wave according to the level of blood congestion without adjusting the amount of light for one irradiation device.

In order to solve the above-described problems, the measurement apparatus according to the present invention corresponds to a plurality of irradiation units arranged to irradiate light of a determined light amount to a measurement site for measuring a pulse wave, and to a level of congestion. And a storage unit that stores the irradiation unit, a measurement unit that measures a pulse wave using light transmitted or reflected by the measurement site irradiated with light, and a determination unit that determines a level of congestion in the measurement site A selection unit that selects the irradiation unit stored in the storage unit in association with the level of congestion determined by the determination unit, and irradiation of light to the measurement site on the irradiation unit selected by the selection unit And a first switch for performing the above operation.
According to this configuration, it is possible to measure the pulse wave according to the level of blood congestion without adjusting the amount of light for one irradiation device.

Preferably, in the above-described aspect, the plurality of irradiation units each have a different amount of light to be irradiated, and the selection unit includes an irradiation unit with a larger amount of light to be irradiated as the level of congestion determined by the determination unit is higher. It is good to choose.
According to this configuration, the amount of light to be measured can be increased as the level of the congested state is higher.

Preferably, in the above-described aspect, a plurality of the measurement units are provided, the storage unit stores a combination of the irradiation unit and the measurement unit in association with the level of congestion, and the selection unit is configured to perform the determination. The irradiation unit of the combination stored in the storage unit in association with the level of congestion determined by the unit is selected, the measurement unit of the combination is selected, and the measurement unit selected by the selection unit selects the measurement unit. A second switch for measuring the pulse wave may be provided.
According to this configuration, it is possible to deal with a number of levels related to the congested state as compared with the case where this configuration is not used.

Preferably, in the above-described aspect, the plurality of irradiating units may be arranged so that the distances from which the irradiating light reaches the measuring unit via the measurement site are equal.
According to this configuration, it is possible to reduce errors due to different distances from the irradiation unit to the measurement unit via the measurement site.

Preferably, in the above-described aspect, the determination unit compares the pulse wave pattern measured by the measurement unit with a predetermined pulse wave pattern, and determines the level of congestion based on the comparison result. May be determined.
According to this configuration, the level of congestion can be determined from the measured pulse wave.

Preferably, in the above-described aspect, the determination unit may detect an operation of the measurement site and determine the level of the congestion based on the detected operation.
According to this configuration, the level of congestion can be determined based on the operation of the measurement site.

In order to solve the above-described problem, the program according to the present invention includes a plurality of irradiation units arranged to irradiate a predetermined amount of light to a measurement site for measuring a pulse wave, and a level of congestion. A storage unit that stores the irradiation unit in association with each other, a measurement unit that measures a pulse wave using light transmitted or reflected by the measurement site irradiated with light, and a light to the measurement site in the selected irradiation unit A computer that controls a measuring device that includes a first switch that irradiates the blood; a determination unit that determines a level of blood congestion at the measurement site; and a storage unit that associates the computer with the level of blood congestion determined by the determination unit It is a program for functioning as a selection part which selects the irradiation part memorize | stored in the part.
According to this configuration, it is possible to cause the computer to measure the pulse wave according to the level of the blood clot state without adjusting the light amount for one irradiation device.

It is a block diagram which shows the whole structure of the measuring apparatus which concerns on embodiment of this invention. It is a figure which shows arrangement | positioning of the irradiation part and measurement part on a pad. It is a figure which shows an example of a correspondence table. It is a figure which shows an example of a level database. It is a figure for demonstrating the alternating current component and direct current | flow component of a pulse wave. It is a flowchart for demonstrating operation | movement of the measuring apparatus which concerns on embodiment of this invention. It is a figure for demonstrating the measurement of the pulse wave according to the level of congestion. It is a figure which shows the whole structure of the measuring apparatus in a modification. It is a figure which shows an example of the level database in a modification. It is a figure which shows an example of the corresponding | compatible table in a modification. It is a figure which shows an example of the level database in a modification. It is a figure which shows an example of the corresponding | compatible table in a modification. It is a figure which shows an example of the measuring apparatus in a modification. It is a figure which shows an example of the corresponding | compatible table in a modification. It is a figure which shows an example of arrangement | positioning of the irradiation part in a modification, and a measurement part.

1. Embodiment 1-1. Configuration FIG. 1 is a block diagram showing an overall configuration of a measuring apparatus 1 according to an embodiment of the present invention. The first irradiating unit 17a and the second irradiating unit 17b (hereinafter referred to collectively as “irradiating unit 17” when there is no particular need to distinguish between them) are irradiating units that irradiate a predetermined amount of light. For example, an LED (Light Emitting Diode) or the like. The amount of light of the second irradiation unit 17b is larger than the amount of light of the first irradiation unit 17a. The first switch 16 is a switch (first switch) that irradiates light to the measurement site by one of the irradiation units 17 under the control of the control unit 11. The measurement unit 15 is a sensor that generates an electrical signal corresponding to the amount of received light, and is a light receiving element such as a photodiode or a phototransistor, for example. The amplifier 14 is an amplifier that amplifies the electrical signal generated by the measurement unit 15 so that the control unit 11 can easily handle it. The display unit 13 is a display device using liquid crystal or the like, and displays an image according to an instruction from the control unit 11.

  The irradiation unit 17 and the measurement unit 15 are provided on a pad P to be attached to a measurement site such as an arm. FIG. 2 is a diagram showing the arrangement of the irradiation unit 17 and the measurement unit 15 on the pad P. As shown in FIG. The pad P is a cloth-like member having flexibility so as to be wound around a measurement site such as an arm, and is made of a resin or the like. As shown in FIG. 2A, the pad P is provided with a first irradiating unit 17a and a second irradiating unit 17b so as to sandwich the central measuring unit 15 therebetween. Each distance between the measurement unit 15 and the first irradiation unit 17a and between the measurement unit 15 and the second irradiation unit 17b is L. When the pad P is wound around the arm 2, as shown in FIG. 2 (b), each irradiation unit 17 is set so that the distances from the two irradiation units 17 to the measurement site 21 included in the arm 2 are equal. The angle of each irradiation unit 17 (the angle in the direction of irradiating light) is adjusted.

  The control unit 11 illustrated in FIG. 1 includes a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), and the like, and the CPU of the control unit 11 is stored in the ROM or the storage unit 12. Each part of the measuring apparatus 1 is controlled by reading and executing a computer program (hereinafter simply referred to as “program”). For example, the control unit 11 functions as a determination unit 111 and a selection unit 112 described later.

  The storage unit 12 is a large-capacity storage unit such as a solid state drive (SSD), and stores a program read by the control unit 11. The storage unit 12 stores a correspondence table 121 and a level database (“database” is described as “DB” in the figure) 122.

  FIG. 3 is a diagram illustrating an example of the correspondence table 121. In the correspondence table 121, the level of congestion and the identification information of the irradiation unit 17 are associated with each other. As shown in FIG. 3, the first irradiation unit 17a is associated with “rest” with a low level of congestion. In addition, “congestion” having a high level of congestion is associated with a second irradiation unit 17b that emits light having a light amount larger than that of the first irradiation unit 17a.

  FIG. 4 is a diagram illustrating an example of the level database 122. In the level database 122, an item for determining the level of congestion is associated with a range in which the level of congestion is determined to be “rest” for the item. In the item, various information obtained from the pulse wave is described. FIG. 5 is a diagram for explaining an AC component and a DC component of a pulse wave. As shown in FIG. 5, the pulse wave waveform has an AC component and a DC component. The AC component of the pulse wave waveform mainly includes biological information, and the DC component of the pulse wave waveform mainly includes noise and stray light information.

  That is, for each of these values and their ratio, the level database 122 describes in advance the range of values that can be taken when the living body is at rest. When the values of these items are measured by the measurement unit 15 or when a ratio is calculated based on these values, the measured value, the calculated ratio, and the like are described in the level database 122. The control unit 11 determines whether the level of blood congestion in the living body is resting or no longer resting (whether it has become congested) by comparing with the range thus determined. That is, the control unit 11 functions as a determination unit 111 that determines the level of congestion in the measurement site.

  Note that the determination unit 111 may determine “rest” when all items described in the level database 122 are within the range associated with each item, or all items may be associated with each other. You may judge "congestion" when it is outside the specified range. Further, the determination unit 111 may determine “rest” when a predetermined number or more of all items described in the level database 122 are within the above range. Further, when the upper and lower items are within the range by setting the items up and down, it may be determined as “rest” even if the lower items are out of the range. Further, a score may be set for each item, and it may be determined whether or not the level of congestion is “rest” based on whether or not the total score of items in the corresponding range is equal to or less than a threshold value. . In this case, the score evaluation is not limited to the total, and the score determined for each item may be substituted into the determined function for evaluation.

  If the determination unit 111 determines the level of congestion at the measurement site and the determination result changes from “rest” to “congestion”, the control unit 11 refers to the correspondence table 121 and is associated with “congestion”. The second irradiation unit 17b is selected, and this second irradiation unit 17b is caused to irradiate the measurement site with light. As a result, when the level of congestion changes from “rest” to “congestion”, the measurement apparatus 1 switches the irradiation unit 17 to be used and increases the amount of light to be irradiated. That is, the control unit 11 selects the irradiation unit stored in the correspondence table 121 in association with the level of congestion determined by the determination unit 111, and causes the irradiation unit to irradiate the measurement site with light. Function as.

1-2. Operation FIG. 6 is a flowchart for explaining the operation of the measuring apparatus 1 according to the embodiment of the present invention. The control unit 11 reads the electrical signal output from the measurement unit 15 and amplified by the amplifier 14, and compares the electrical signal with the content of the level database 122 to determine the level of congestion (step S1). Then, the control unit 11 determines whether or not there has been a change in the level of blood congestion (step S2). When it is determined that there is a change in the level of blood congestion (step S2; YES), the control unit 11 refers to the correspondence table 121, selects the irradiation unit 17 associated with the level of blood congestion after the change, The irradiation part is irradiated with light to the measurement part (step S3). In the initial state, the level of congestion is set as a state that is neither “rest” nor “congestion”. Therefore, when the level of congestion is determined for the first time after the measurement apparatus 1 is activated, the control unit 11 If there is a change in level, this step S3 is performed.

  Further, when the level of congestion is changed from “rest” to “congestion” or from “congestion” to “rest”, the control unit 11 stops power supply to the irradiation unit 17 that has not been selected. Of the two irradiating units 17, only one irradiates light.

  When it is determined that there is no change in the level of congestion (step S2; NO), the control unit 11 determines whether there is an instruction to end measurement from the user via an operation unit (not shown) or the like (step S4). When it is determined that there is an instruction to end the measurement (step S4; YES), the control unit 11 ends the measurement process. When it is determined that there is no instruction to end the measurement (step S4; NO), the control unit 11 returns the process to step S1.

  By performing the above-described operation, the measuring apparatus 1 can measure the pulse wave according to the level of congestion. FIG. 7 is a diagram for explaining measurement of a pulse wave according to the level of congestion. When the level of congestion is resting and a normal amount of light is emitted from the first irradiating unit 17a, a pulse wave waveform that falls within the measurable range as shown in FIG. 7A is obtained. It is done. On the other hand, when a normal amount of light is irradiated from the first irradiation unit 17a when the living body becomes congested, the amplitude of the pulse wave is smaller than that of FIG. 7A as shown in FIG. 7B. As a result, the obtained information decreases and the influence of noise increases.

  When the measuring device 1 determines that the living body has become congested, the measuring device 1 switches the irradiation unit 17 to the second irradiation unit 17b having a larger amount of light than the first irradiation unit 17a, and thus obtains information above a certain level from the pulse wave. It is done. For example, when the irradiating unit 17 to which the control unit 11 irradiates light when the living body becomes congested is switched from the first irradiating unit 17a to the second irradiating unit 17b, as shown in FIG. Therefore, a pulse wave that is not too narrow and falls within the measurement range can be obtained.

  When the living body returns from a congested state to a resting state, if light irradiation by the second irradiation unit 17b continues, the amount of light of the second irradiation unit 17b is larger than that of the first irradiation unit 17a. ), The obtained pulse wave may exceed the measurement range. When the measuring apparatus 1 determines that the living body has returned to rest, the irradiation unit 17 is switched to the first irradiation unit 17a having a light amount smaller than that of the second irradiation unit 17b. It is hard to happen that is missing.

  Furthermore, when determining the level of congestion, the measuring device 1 does not control the amount of light emitted by one irradiation device, but irradiates light of a light amount corresponding to the determined level among the plurality of irradiation units 17. The irradiation unit 17 to be selected is selected. Therefore, when the measuring apparatus 1 is used, feedback control for increasing / decreasing the amount of light and a circuit therefor are not required, and there is no influence of noise generated with the feedback control.

2. Modification The above is the description of the embodiment, but the contents of this embodiment can be modified as follows. Further, the following modifications may be combined.

(1) Determination of Congestion Level In the above-described embodiment, the level database 122 associates an item for determining the congestion level with a range in which the congestion level is determined to be “rest”. In this item, information obtained from the pulse wave is described, but this item is not limited to that derived from the pulse wave. This item may include, for example, a detection result of a sensor that detects body movement.

  FIG. 8 is a diagram showing the overall configuration of the measuring apparatus 1a in this modification. The measuring device 1 a includes a sensor 18 that detects body movement, and a level database 122 a is stored in the storage unit 12 a instead of the level database 122. FIG. 9 is a diagram showing an example of the level database 122a in this modification. As shown in FIG. 9, in the level database 122a, the acceleration, height, and the like of the measurement site detected by the sensor 18 as items are associated with ranges for determining each “rest”. The control unit 11 determines the level of blood congestion based on the information of body movement detected by the sensor 18 and the description content of the level database 122a. Then, the control unit 11 may select the irradiation unit 17 corresponding to the determined level of congestion and refer to the correspondence table 121 and cause the selected irradiation unit 17 to irradiate the measurement site with light. Note that the sensor 18 may detect the moving direction, speed, inclination, and the like of the measurement site in addition to the acceleration and height. In short, the sensor 18 may detect the operation of the measurement site.

(2) In the embodiment described above, the level of congestion is two types of “rest” and “congestion”, but may be three or more types. The measuring apparatus 1b in this modified example stores a correspondence table 121b and a level database 122b in the storage unit 12. FIG. 10 is a diagram showing an example of the correspondence table 121b in this modification. FIG. 11 is a diagram showing an example of the level database 122b in this modification. In this modified example, the level of congestion is divided into five levels: “Ischemia II”, “Ischemic I”, “Rest”, “Congestion I”, and “Congestion II”. In the correspondence table 121b, “rest” is associated with the first irradiation unit 17a, and “congestion I” is associated with the second irradiation unit 17b. In addition, in the correspondence table 121b, the fifth irradiation unit 17e is used for “ischemia II”, the fourth irradiation unit 17d is used for “ischemia I”, and the third irradiation unit 17c is used for “congestion II”. Each is associated.

  In the correspondence table 121b shown in FIG. 10, the level of congestion increases in the order of “ischemia II” → “ischemia I” → “rest” → “congestion I” → “congestion II”. In the correspondence table 121b, the amount of light to be irradiated is “fifth irradiation unit 17e” → “fourth irradiation unit 17d” → “first irradiation unit 17a” → “second irradiation unit 17b” → “third”. The number increases in the order of “irradiation unit 17c”.

  In this modification, the level database 122b describes items for determining the level of congestion, and each item is described in association with a range of congestion levels divided into five levels. . When the values of these items are obtained by the measuring unit 15 and the like, the control unit 11 compares the range described in the level database 122 to specify the level of blood congestion in the living body from any one of the five levels. And the control part 11 should just select the irradiation part 17 corresponding to the specified level of congestion with reference to the correspondence table 121b. Thereby, the measuring apparatus 1b can adjust the light quantity to irradiate more finely according to the level of congestion.

(3) Description of Irradiation Unit in Correspondence Table In the above-described embodiment, the identification information of the irradiation unit is described in the correspondence table 121 in association with the level of congestion. May be described. For example, the correspondence table 121 may describe the amount of light emitted in association with the level of congestion. FIG. 12 is a diagram showing an example of the correspondence table 121c in this modification. In the correspondence table 121c shown in FIG. 12, “normal” is described as the amount of light associated with “rest” as the level of congestion, and “large” is described as the amount of light associated with “congestion”. The control unit 11 may refer to the correspondence table 121c and control the irradiation unit 17 so that when the living body becomes “congested”, the irradiation unit 17 emits more light than that at rest. For example, if the control unit 11 operates only one irradiating unit 17 and irradiates light at rest, the control unit 11 operates two or more irradiating units 17 to irradiate light when congested. You can do it.

(4) Combination of Irradiation Unit and Measurement Unit In the above-described embodiment, the measurement apparatus 1 includes only one measurement unit 15, but may include a plurality of measurement units. Moreover, although the selection part 112 has selected the irradiation part according to the level of congestion determined by the determination part 111, you may select the combination of an irradiation part and a measurement part according to the level of congestion. FIG. 13 is a diagram illustrating an example of a measurement apparatus 1d according to this modification. The measurement device 1d includes two measurement units 15 including a first measurement unit 15a and a second measurement unit 15b (hereinafter, collectively referred to as “measurement unit 15” unless otherwise necessary), And a second switch 16 d for switching the measurement unit 15. The second switch 16d selects one of the first measurement unit 15a and the second measurement unit 15b under the control of the control unit 11, and supplies the electric signal output from the selected measurement unit 15 to the amplifier 14. Switch (second switch).

  The measuring device 1d includes a storage unit 12d instead of the storage unit 12, and the storage unit 12d stores a correspondence table 121d instead of the correspondence table 121 and a level database 122d instead of the level database 122. Yes. Note that the level database 122d is similar to the level database 122b shown in FIG. 11 and describes a range of congestion levels divided into a plurality (in this case, four levels) in association with each item. Therefore, the description is omitted.

  FIG. 14 is a diagram showing an example of the correspondence table 121d in this modification. The second measurement unit 15b is a measurement unit having higher sensitivity than the first measurement unit 15a. In the correspondence table 121d, as shown in FIG. 14, the level of congestion is classified into four stages of “ischemia”, “rest”, “congestion I”, and “congestion II”. The level of congestion is increased in the order of “ischemia” → “rest” → “congestion I” → “congestion II”. In the correspondence table 121d, the first irradiation unit 17a is described as the irradiation unit 17 in association with “ischemia” and “rest”. In the correspondence table 121d, the first measurement unit 15a is described as the measurement unit 15 corresponding to “ischemia”, and the second measurement unit 15b is described as the measurement unit 15 corresponding to “rest”.

  For example, when the control unit 11 refers to the correspondence table 121d and determines that the level of congestion is changed from “rest” to “ischemia”, the control unit 11 does not change the irradiation unit 17 and the measurement unit 15 performs the second measurement. The part 15b is changed to the first measuring part 15a. When changing from the “rest” state to the “ischemic” state, the blood at the measurement site is deficient, and thus the amount of light that passes through the living body among the irradiated light increases. Therefore, in this case, the selection unit 112 is in a range in which the increased amount of light can be measured by using the first measurement unit 15a having a lower sensitivity than the second measurement unit 15b used at the time of “rest”. Do not exceed the measurement range.

  Further, in the correspondence table 121d, when it is determined that the level of congestion is changed from “rest” to “congestion I”, the irradiation unit 17 is changed from the first irradiation unit 17a to the second irradiation unit 17b, and measurement is performed. The unit 15 is changed from the second measurement unit 15b to the first measurement unit 15a. When the living body becomes congested, the blood volume at the measurement site increases. When the amount of blood increases, the amount of light transmitted through the living body out of the irradiated light decreases, so that it is necessary to irradiate the measurement site with a larger amount of light. Therefore, the selection unit 112 selects the second irradiation unit 17b having a larger amount of light than the first irradiation unit 17a, and causes the measurement site to be irradiated with light by the second irradiation unit 17b. However, when the second irradiating unit 17b is used, the amount of light increases more than that of the first irradiating unit 17a, and therefore the amount of light may fall outside the measurement range with the sensitivity of the second measuring unit 15b. Therefore, the selection unit 112 uses the first measurement unit 15a having a lower sensitivity than the second measurement unit 15b, thereby keeping the amount of light to be measured within the measurement range. As described above, the measurement device 1d selects a combination of the irradiation unit 17 and the measurement unit 15 according to the level of congestion. Since the number of combinations corresponds to the product of the number of irradiation units 17 with different amounts of irradiated light and the number of measurement units 15 with different sensitivities, the measurement apparatus 1d further divides the state of congestion. Measurements according to the measured level can be performed.

  In this modification, the irradiation unit 17 and the measurement unit 15 provided in the measurement device 1d are provided on the pad Pd. And on this pad Pd, the two irradiation parts 17 may be arrange | positioned so that all may be located in the same distance as the two measurement parts 15, respectively. FIG. 15 is a diagram illustrating an example of the arrangement of the irradiation unit 17 and the measurement unit 15 in this modification. As shown in FIG. 15, the first irradiation unit 17a is provided at a position where the distance from the first measurement unit 15a and the distance from the second measurement unit 15b are both L2. Thereby, the distance until the light irradiated from the 1st irradiation part 17a reaches the 1st measurement part 15a via a measurement site | part becomes equal to the distance until it reaches the 2nd measurement part 15b.

  The second irradiation unit 17b is also provided at a position where the distance from the first measurement unit 15a and the distance from the second measurement unit 15b are both L2. Thereby, the distance from which the light irradiated from the 2nd irradiation part 17b reaches the 1st measurement part 15a via a measurement part becomes equal to the distance to the 2nd measurement part 15b. In this way, measurement errors are reduced by making the optical path distances equal.

(5) Program The program executed by the control unit 11 of the measuring apparatus 1 is read by a computer device such as a magnetic recording medium such as a magnetic tape or a magnetic disk, an optical recording medium such as an optical disk, a magneto-optical recording medium, or a semiconductor memory. It may be provided in a state stored in a possible recording medium. It is also possible to download this program via a network such as the Internet. Note that various devices other than the CPU may be applied as the control means exemplified by the control unit 11. For example, a dedicated processor or the like is used.

DESCRIPTION OF SYMBOLS 1,1a, 1b, 1d ... Measuring apparatus, 11 ... Control part, 111 ... Determination part, 112 ... Selection part, 12, 12a, 12d ... Storage part, 121, 121b, 121c, 121d ... Correspondence table, 122, 122a, 122b, 122d ... level database, 13 ... display unit, 14 ... amplifier, 15 ... measurement unit, 15a ... first measurement unit, 15b ... second measurement unit, 16 ... first switch, 16d ... second switch, 17 ... irradiation 17a ... the first irradiation unit, 17b ... the second irradiation unit, 17c ... the third irradiation unit, 17d ... the fourth irradiation unit, 17e ... the fifth irradiation unit, 18 ... the sensor, 2 ... the arm, 21 ... the measurement site.

Claims (7)

A plurality of irradiation units arranged to irradiate light of a determined light amount to a measurement site for measuring a pulse wave,
A storage unit for storing the irradiation unit in association with the level of congestion;
A measurement unit that measures a pulse wave using light transmitted or reflected by the measurement site irradiated with light; and
A determination unit for determining a level of congestion at the measurement site;
A selection unit that selects an irradiation unit stored in the storage unit in association with the level of blood congestion determined by the determination unit;
And a first switch that causes the irradiation unit selected by the selection unit to emit light to the measurement site. Each of the plurality of irradiation units has a different amount of light to be irradiated,
The measurement device according to claim 1, wherein the selection unit selects an irradiation unit that emits more light as the level of congestion determined by the determination unit is higher. A plurality of the measurement units are provided,
The storage unit stores a combination of the irradiation unit and the measurement unit in association with the level of congestion.
The selection unit selects the irradiation unit of the combination stored in the storage unit in association with the level of congestion as determined by the determination unit, and selects the measurement unit of the combination,
The measurement apparatus according to claim 1, further comprising: a second switch that causes the measurement unit selected by the selection unit to measure the pulse wave. The measuring apparatus according to claim 1, wherein the plurality of irradiation units are arranged so that each distance from which the irradiated light reaches the measurement unit via the measurement site is equal. . The determination unit compares the pulse wave pattern measured by the measurement unit with a predetermined pulse wave pattern, and determines the level of blood congestion based on the comparison result. The measuring apparatus according to any one of claims 1 to 4. The measurement apparatus according to any one of claims 1 to 4, wherein the determination unit detects an operation of the measurement site and determines the level of blood congestion based on the detected operation. A plurality of irradiation units arranged to irradiate light of a determined light amount to a measurement site for measuring a pulse wave,
A storage unit for storing the irradiation unit in association with the level of congestion;
A measurement unit that measures a pulse wave using light transmitted or reflected by the measurement site irradiated with light; and
A computer for controlling the measuring device, comprising: a first switch that causes the selected irradiation unit to irradiate the measurement site with light;
A determination unit for determining a level of congestion at the measurement site;
The program for functioning as a selection part which selects the irradiation part memorize | stored in the said memory | storage part in association with the level of the congestion which the said determination part determined.

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