JP2021003396A - Biological information measurement device - Google Patents

Abstract

To efficiently and suitably measure each of an active mass and biological information by measuring an active mass such as the number of steps and reducing power consumption.SOLUTION: A biological information measurement device which allows a user to carry and use comprises: a biological information measurement unit which is mounted to a measurement part of the user to measure biological information of the user; an active mass measurement unit which has an acceleration sensor and measures an active mass of the user on the basis of an output from the acceleration sensor; and a drive source which supplies power to the biological information measurement unit and the active mass measurement unit to allow each measurement. When variation in the state of a biological information processing device is detected on the basis of the output from the acceleration sensor, the drive source starts power supply to the active mass measurement unit to enable the active mass measurement unit to measure the active mass but never supplies power to the biological information measurement unit.SELECTED DRAWING: Figure 4

Description

The present invention relates to a biological information measuring device that measures biological parameters such as percutaneous arterial oxygen saturation (SpO ₂ ) as biological information.

As a biological information measuring device for measuring biological parameters, a pulse oximeter for measuring percutaneous arterial oxygen saturation (SpO ₂ ) is known. A pulse oximeter is a medical device for non-invasively measuring percutaneous arterial oxygen saturation (SpO ₂ ) by light, and the probe is usually used for the measurement of fingers, toes, ear lobes, etc. It is configured to be attached to the site.

In a general pulse oximeter, for example, a light emitting element that emits red light and infrared light is provided toward the mounted portion, and a light receiving element that detects the light transmitted through the mounted portion is provided in the lower housing. It is provided. Since hemoglobin in blood has different absorbances of red light and infrared light depending on the presence or absence of binding to oxygen, the light emitted by the light emitting element that has passed through or reflected from the fingertips is measured and analyzed by the light receiving element. By doing so, the percutaneous arterial oxygen saturation can be measured.

In recent years, with the miniaturization of electronic components, pulse oximeters have also been made smaller and lighter, and can be used outside the operating room, for example, for respiratory disease examinations by patients themselves at home and for home-visit nursing. It is possible. As a miniaturized pulse oximeter, a handheld type that can be held in the hand, a one-hand grip type that can be held with one hand, a wristwatch type, a light emitting element attached to the fingertip and an integrated finger with a display unit integrated with the light receiving element. Various forms such as pulse oximeters for watches are known.

For example, the pulse oximeter shown in Patent Document 1 is a compact and lightweight clip-type pulse oximeter that can be attached to a fingertip and used. This pulse oximeter has a probe unit that acquires percutaneous arterial oxygen saturation (blood oxygen saturation) using a light emitting element and a light receiving element, and a percutaneous arterial blood that measures and analyzes the acquired biological signal. It is configured by integrating with the main body that measures and records oxygen saturation.

JP-A-2007-167184

By the way, it is known that the pulse oximeter is used for the treatment of COPD (Chronic Obstructive Pulmonary Disease) by home oxygen therapy (HOT) for home use. Home oxygen therapy is a method used to improve percutaneous arterial oxygen saturation values in patients. Home oxygen therapy is generally treated by supplying high-concentration oxygen into the patient's body by an oxygen concentrator, which is a kind of oxygen supply device. In this case, the patient installs an oxygen concentrator at home, and when at home, inhales high-concentration oxygen from the oxygen concentrator according to the doctor's prescription. The doctor who decides the prescription of oxygen flow rate etc. for the patient aims to improve the numerical value of oxygen saturation by observing the follow-up of home oxygen therapy and reviewing the prescription as appropriate, and eventually the QOL (Quality of Life) of the patient. ) Is being improved.

Therefore, it is necessary for the doctor not only to examine the patient's condition but also to confirm the appropriateness of the prescription decided by himself / herself or the patient's prescription compliance status (hereinafter referred to as "progress of home oxygen therapy"). Pulse oximeters have been used to confirm the prognosis of such patients.

"Physical activity" is one of the parameters related to the prognosis of COPD patients, and in recent years, pulse oximeters have a function as a pedometer that measures the number of steps that is an index of the patient's physical activity. It has been realized.

Since the pulse oximeter having the function of a pedometer cannot predict the start of walking of the patient, it is set so that the power is always on and can be used repeatedly by charging.

However, since the power is always on even when the patient is not wearing a pulse oximeter or walking, power is always consumed even when the patient is not functioning as a pedometer, and the power consumption as a pulse oximeter is consumed. Becomes larger.

In particular, even with a rechargeable pulse oximeter, when measuring percutaneous arterial oxygen saturation, the patient needs to be charged and used daily so that the measurement can be performed favorably without interruption. is there. The patient may forget to charge the pulse oximeter, and the pulse oximeter used by the patient is desired to have as little power consumption as possible even if the number of steps can be measured.

The present invention has been made in view of the above points, and it is possible to measure the amount of activity such as the number of steps, reduce the power consumption, and efficiently and appropriately perform the amount of activity measurement and the biometric information measurement respectively. It is an object of the present invention to provide a biological information measuring device capable of performing.

The pulse oximeter of the present invention
A biometric information measuring device that can be carried and used by the user.
A biometric information measuring unit that is attached to the measuring site of the user and measures the biometric information of the user.
An activity amount measuring unit having an acceleration sensor and measuring the activity amount of the user based on the output of the acceleration sensor.
A drive source that supplies power to the biological information measurement unit and the activity measurement unit to enable their respective measurements.
Have,
When a change in the state of the biological information measuring device is detected based on the output of the acceleration sensor, the drive source starts supplying power to the activity measuring unit, and the activity measuring unit starts supplying power to the activity measuring unit. While enabling measurement of activity, power is not supplied to the biometric information measurement unit.
Take the composition.

According to the present invention, it is possible to realize a biometric information measuring device capable of measuring an activity amount such as the number of steps, reducing power consumption, and efficiently and appropriately performing activity amount measurement and biometric information measurement respectively. To do.

It is an external view of the pulse oximeter which is an example of the biological information measuring apparatus which concerns on embodiment of this invention. It is a figure which shows the state which the finger insertion opening of the pulse oximeter is opened. It is a schematic side view which shows the open / close detection part of the pulse oximeter. It is a block diagram which shows the main part structure of the pulse oximeter. It is a figure which shows the operation of measuring the percutaneous arterial oxygen saturation by the pulse oximeter. It is a figure which shows the operation of measuring the percutaneous arterial oxygen saturation by the pulse oximeter. It is a flowchart which shows the power-on operation of the pulse oximeter.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram showing an example of the appearance of a pulse oximeter, which is an example of a biological information measuring device according to an embodiment of the present invention. The pulse oximeter 100 is a type of pulse oximeter in which a probe portion and a main body portion are integrated as an upper housing and a lower housing, and a power supply unit is housed and attached to a fingertip. The pulse oximeter 100 of the present embodiment is used, for example, in the follow-up observation of home oxygen therapy using an oxygen concentrator. The pulse oximeter 100 used in this case is an example of the amount of activity that is an index of physical activity as a judgment material for confirming the progress (confirmation of prognosis) of the patient's home oxygen therapy as a user. It has a step count measurement function that measures the number of steps. In the present embodiment, a pulse oximeter will be described as an example of the biological information measuring device, but the present invention is not limited to this, and any biological information measuring device that measures biological parameters with a clip-shaped probe portion is used. It may be a device.

The pulse oximeter 100 shown in FIGS. 1 to 3 has a clip-shaped probe portion, and the probe portion is connected to an upper housing (opening / closing portion) 110 and a lower housing (opening / closing portion) so as to be openable / closable by a hinge portion 130. Part) 120. The hinge portion 130 is provided so as to generate a rotational force in the direction of closing the upper housing 110 and the lower housing 120. As a result, the pulse oximeter 100 sandwiches the patient's finger Y inserted in the finger insertion port 140 between the upper housing 110 and the lower housing 120 in the direction of the arrow with an appropriate force (FIGS. 5 and 5). 6) can be done. That is, the upper housing 110, the lower housing 120, and the hinge portion 130 are removably attached to the patient's finger Y as a whole.

Further, the pulse oximeter 100 has a display 112 which is a display unit on the upper surface of the upper housing 110. Although not shown, the pulse oximeter 100 is provided with an opening on the rear surface of the upper housing 110 to accommodate a battery (corresponding to a first power source) as a main drive power source. Is watertightly closed by a battery lid so that it can be opened and closed. An externally connectable connector (not shown) such as a micro USB connector is provided in the vicinity of the battery housing portion at the portion closed by the battery lid. An externally connectable connector enables data to be sent and received to and from an external device via an adapter (not shown).
The display 112 displays the time, the measured value, the operating status, and the like. The display 112 displays percutaneous arterial oxygen saturation (SpO ₂ : hereinafter also referred to as “arterial oxygen saturation”), pulse wave, pulse rate, step count, and the like as measured values under the control of the control unit 180. The display 112 may display the measured value in a plurality of modes such as a step count measurement mode and a percutaneous arterial oxygen saturation measurement mode (also referred to as “arterial oxygen saturation measurement mode”).

Further, the display 112 can display the remaining battery level according to the mode. As a specific display form, the display 112 can easily visually recognize the remaining amount of the main battery of the first power supply unit 162 (see FIG. 4) housed in the pulse oximeter 100 as a battery remaining amount display. It is displayed schematically as follows.
At the time of percutaneous arterial oxygen saturation measurement, the display 112 displays the measured percutaneous arterial oxygen saturation in the unit of "% SpO ₂ " as a display screen of the arterial oxygen saturation measurement mode. In addition to this, the display 112 displays the remaining battery level, the pulse wave displayed by the bar graph, and the pulse rate measured by "number + PR bpm". The length of the bar in the bar graph corresponds to the detection intensity of the detected pulse wave. Also, when the perfusion index (PI) measured along with the percutaneous arterial oxygen saturation is not sufficient, for example, the percutaneous arterial oxygen saturation number is blinked. Further, in the step count measurement mode, the step count may or may not be displayed on the display as the step count measurement mode display screen.

During the percutaneous arterial oxygen saturation measurement, the patient can confirm the measured value of the percutaneous arterial oxygen saturation and other information on the display 112. Further, the measured measured value is recorded in the data storage unit 125 (see FIG. 4).

In addition, when the percutaneous arterial oxygen saturation is measured and recorded, the patient may be informed by the record notification. Further, when the continuous wearing time is too long, it may be notified by a warning notification to that effect.

FIG. 4 is a block diagram showing an example of the configuration of the pulse oximeter 100.

The pulse oximeter 100 of FIG. 4 has a percutaneous arterial oxygen saturation measurement unit (hereinafter referred to as “oxygen saturation measurement unit”) 150, a first power supply unit (drive source) 162, and a second power supply unit (drive source). It has 164, a clock / calendar function unit 165, a step count measurement unit 166, an open / close detection unit 168, a control unit 180, a display (display unit) 112, a data communication unit 124, and a data storage unit 125.

The oxygen saturation measuring unit 150 includes a light emitting element 152 and a light receiving element 154, and the light emitting element 152 and the light receiving element 154 function as a probe unit for measuring percutaneous arterial oxygen saturation as so-called biological information. The oxygen saturation measuring unit 150 measures the pulse rate (that is, the pulse wave measurement value) together with the percutaneous arterial oxygen saturation.
A detection signal is obtained by emitting red light or infrared light by the light emitting element 152 and transmitting it to a specific part of the patient (for example, fingertip, toe, etc.) and detecting the transmitted light by the light receiving element 154. The oxygen saturation measurement unit 150 outputs a detection signal to the oxygen saturation measurement circuit (not shown) of the control unit 180, and the oxygen saturation measurement circuit measures the oxygen saturation and the pulse rate based on the detection signal. To.

In the present embodiment, the light emitting element 152 and the light receiving element 154 are arranged in the upper housing 110 and the lower housing 120 constituting the finger insertion slot 140. The light emitting element 152 is, for example, a light emitting diode, and the light receiving element 154 is, for example, a photodiode. The light emitting diode is driven by a control unit 180 (specifically, a light emission drive circuit (not shown) of the control unit 180) to emit light having a different predetermined wavelength. When the photodiode receives light of two predetermined wavelengths, it outputs a current signal corresponding to the amount of the received light to the control unit 180 (specifically, the current-voltage conversion circuit of the control unit 180). The light emitted and received by the light emitting element 152 constituting the probe unit is, for example, infrared light and red light. The light emitting element 152 and the light receiving element 154 are driven by the power supply from the first power supply unit 162.

The first power supply unit 162 is the main drive power source of the pulse oximeter 100, and each part of the pulse oximeter 100, for example, the control unit 180, the open / close detection unit 168, the light emitting element 152 and the light receiving element 154 of the oxygen saturation measurement unit 150. Etc. are supplied with electric power to drive each of them.

In the present embodiment, the first power supply unit 162 is a dry battery, and is interchangeably housed in a battery housing unit closed by a battery lid.

The second power supply unit 164 has a smaller power supply capacity and lower power consumption than the first power supply unit 162. The second power supply unit 164 is a so-called internal battery in which a button battery or the like is used, and is used for data storage of a backup memory such as a BIOS in a clock or a pulse oximeter 100. In the present embodiment, the second power supply unit 164 supplies power to the clock / calendar function unit 165, and power is not supplied from the first power supply unit 162 to each unit, that is, the power of the pulse oximeter 100 is off. In the state, power is supplied to the acceleration sensor 170.

The clock / calendar function unit 165 measures and displays the time / calendar. For example, in the pulse oximeter 100, the measurement date and time is stored as the date and time indicated by the clock / calendar function unit 165 at the time when the oxygen saturation measurement unit 150 measures the oxygen saturation and the pulse rate. The clock / calendar function unit 165 is driven by power supply from the second power supply unit 164.

The step count measuring unit 166 measures the number of steps of the patient. In the present embodiment, the pedometer 166 has an acceleration sensor 170 and a pedometer counting circuit (not shown) of the control unit 180, and the acceleration sensor 170 measures the acceleration of the pulse oximeter 100.

The acceleration sensor 170 detects the acceleration of the pulse oximeter 100 (based on displacement due to tilt and movement) and outputs it to the control unit 180. The control unit 180 measures the number of steps taken by the patient based on the output of the acceleration sensor 170. That is, the control unit 180 functions together with the acceleration sensor 170 as a pedometer measuring unit for measuring the number of steps taken by the patient. The acceleration sensor 170 detects the stationary state and the moving state of the pulse oximeter 100.

The acceleration sensor 170 transmits the detected measurement result to the control unit 180, and the step count measurement circuit (not shown) of the control unit 180 measures the step count. For the step count measurement in the acceleration sensor 170, for example, a 3-axis acceleration sensor is applied to the acceleration sensor 170, and the total value of acceleration in the 3-axis direction is used to measure the number of steps of the patient. The walking of the patient can also be determined by measuring the number of steps.

The acceleration sensor 170 of the first power supply unit 162 and the second power supply unit 164 from the start of use of the pulse oximeter 100, that is, from the time when the first power supply unit 162 and the second power supply unit 164 are attached to the pulse oximeter for the first time. Power is supplied from at least one side. In the present embodiment, the acceleration sensor 170 is driven by the power supply from the second power supply unit 164 from the start of use of the pulse oximeter 100.

The open / close detection unit 168 detects the open / closed state of the upper housing 110 and the lower housing 120 and outputs the open / closed state to the control unit 180. That is, the open / close detection unit 168 drives the control unit 180 and the oxygen saturation measurement unit 150 to bring the oxygen saturation into a state in which the oxygen saturation can be measured before the percutaneous arterial oxygen saturation is measured by the pulse oximeter 100. .. The open / close detection unit 168 has, for example, a magnetic sensor 172 such as a Hall element and a magnet 174. The magnetic sensor 172 opens or closes the opening / closing parts (upper housing 110 and lower housing 120) for oxygen saturation measurement based on the change in magnetic flux depending on the distance between the upper housing 110 and the lower housing 120. The state can be detected. The positions of the magnetic sensor 172 and the magnet 174 may be set in any way as long as the open / closed state of the upper housing 110 and the lower housing 120 is detected. In the pulse oximeter 100 shown in FIG. 3, the magnetic sensor is used. The 172 and the magnet 174 may be provided at opposite positions, respectively.

The control unit 180 includes a CPU, RAM, and ROM. The control unit 180 executes a control program stored in a storage medium such as a ROM to set a mode, calculate a measured value, and control each unit of the pulse oximeter 100.
The control unit 180 has an oxygen saturation measurement circuit (not shown) that measures oxygen saturation and pulse rate (that is, pulse wave measurement value). The control unit 180 is driven by an oxygen saturation measurement circuit (not shown) using the detection result of the open / close detection unit 168 (here, the detection result of the acceleration sensor 170) as a trigger, and the ratio of oxidized hemoglobin to the total hemoglobin of arterial blood. To detect changes in absorptivity synchronized with the pulse of arterial blood. By converting this detection result into digital data, the control unit 180 acquires the oxygen saturation measurement value and the pulse measurement value. The oxygen saturation measurement circuit includes, for example, a current-voltage conversion circuit, a demodulation circuit, a signal processing circuit, a light emission drive circuit, and the like. The current-voltage conversion circuit converts the current signal input from the oxygen saturation measuring unit 150 into a voltage signal, and outputs the voltage signal to the demodulator circuit. The demodulation circuit receives the signal input from the light emitting drive circuit, separates the voltage signal input from the current-voltage conversion circuit for each component corresponding to the above-mentioned wavelength, and demodulates the two observation signals. Then, the demodulation circuit outputs the demodulated observation signal to the signal processing circuit. The signal processing circuit performs predetermined signal processing (for example, amplification and A / D conversion) on the two observation signals input from the demodulation circuit, and calculates the processed observation signal. The light emitting drive circuit receives CPU control and causes two light emitting diodes, which are light emitting elements 152, to emit light.

The control unit 180 functions as a step count measuring unit 166 together with the acceleration sensor 170, and measures the number of steps based on the data from the acceleration sensor 170. The control unit 180 displays the measured number of steps on the display 112 or records it on the data storage unit 125.

The control unit 180 displays on the display 112 as an arterial oxygen saturation measurement mode and a step count measurement mode based on the signals input from each unit. The control unit 180 drives the oxygen saturation measurement unit 150 to start measuring the oxygen saturation, such as causing the light emitting element 152 to emit light and receiving light from the light receiving element 154 by a signal from the magnetic sensor 172. To do. When the pulse oximeter 100 is stopped and a signal indicating the movement of the pulse oximeter 100 is input from the acceleration sensor 170, each unit that enables the step count measuring unit 166 from the first power supply unit 162 via the control unit 180. Power is supplied to.
Further, the control unit 180 stops the step count measurement when the percutaneous arterial oxygen saturation is being measured. In addition, when the percutaneous arterial oxygen saturation measurement is started at the time of step count measurement, the step count measurement is stopped.

The data communication unit 124 is an interface for communicably connecting the pulse oximeter 100 and, for example, an oxygen concentrator or an external device. The connection between the pulse oximeter 100 and the oxygen concentrator and the connection between the pulse oximeter 100 and an external device such as a home oxygen therapy management device are short-range wireless communication methods such as Bluetooth (registered trademark). It is done by wireless communication based on. The pulse oximeter 100 and the oxygen concentrator are not connected to each other so that they can always communicate with each other, but can communicate with each other while they are close to each other and a wireless communication channel is established.

The data storage unit 125 includes a rewritable non-volatile memory (not shown) such as a flash memory, and can record the measurement result under the control of the control unit 180.

The drive operation of the present embodiment will be described.

FIG. 7 is a flowchart showing an example of the operation of the pulse oximeter 100.

The operation of the pulse oximeter 100 is controlled by the control unit 180 as described above. In addition, the control unit 180 measures the percutaneous arterial oxygen saturation, measures the pulse wave, the pulse rate, and the like, and records and displays these measured values. Here, the function of the pedometer for measuring the number of steps during walking by automatically turning on the main power in the pulse oximeter 100 in the shut down state, that is, in the state where the main power is not turned on will be described.

The pulse oximeter 100 first determines whether or not the posture has changed from a stationary state such as a state in which the pulse oximeter 100 is placed at a predetermined place. That is, in step S10, it is determined whether or not the acceleration sensor 170 has detected the acceleration information of the pulse oximeter 100. The acceleration sensor 170 is constantly receiving power saving power from the second power supply unit 164 when the pulse oximeter 100 is in the shutdown state. In this state, the acceleration sensor 170 detects a change in posture of the pulse oximeter 100 from a stationary state, that is, whether there is a displacement of the pulse oximeter 100.

If the acceleration information is detected in step S10, that is, if the displacement of the pulse oximeter 100 is detected, the process proceeds to step S12. In step S12, the main power supply of the pulse oximeter 100 is turned on, power supply to each unit is started from the first power supply unit 162, and power is supplied to the acceleration sensor 170 from the first power supply unit 162. That is, power supply to the step count measuring unit 166 (including the acceleration sensor 170) and the control unit 180 is started from the first power supply unit 162 so that the step count can be measured. Specifically, in step S12, the acceleration sensor 170 that has detected the acceleration information outputs a signal to the first power supply unit 162, the first power supply unit 162 that receives the signal rises, and supplies power to the control unit 180 and each unit. Supply. As a result, in step S14, the control unit 180 starts the step count measurement as the step count measurement unit 166 together with the acceleration sensor 170. Further, when the first power supply unit 162 supplies power to the control unit 180, the control unit 180 switches the power supply of the acceleration sensor 170 from the second power supply unit 164 to the first power supply unit 162. Further, the control unit 180 may perform step count measurement mode display control so that the step count measurement value can be displayed on the display 112. In the present embodiment, the control unit 180 is supplied with electric power from the first power supply unit 162, so that the pulse oximeter 100 is powered on and the arterial oxygen saturation measurement unit (specifically, the light emitting element 152). ) Is supplied with power to start up.

The pulse oximeter 100 is carried by a patient, and when the patient walks, the power is automatically turned on and the number of steps can be measured. In this state, power is not supplied to the light emitting element 152 and the light receiving element 154, and the percutaneous arterial oxygen saturation measurement mode is not set. As a result, it is possible to efficiently secure electric power for measuring the percutaneous arterial oxygen saturation.

Then, as shown in step S16, it is determined whether or not there is an output from the acceleration sensor 170 even after a lapse of a certain period of time, and if there is no acceleration information from the acceleration sensor 170 for a certain period of time, the measurement by the pulse oximeter is stopped. Is regarded as, and the process is terminated.

As described above, the pulse oximeter 100 according to the present embodiment automatically turns on from the power off when the pulse oximeter 100 is lifted or carried and the number of steps during walking is to be measured. It becomes a state and starts counting the number of steps. That is, even when power is not supplied from the first power supply unit 162, which is the main power source, to each of the main components of the pulse oximeter 100 via the control unit 180, the number of steps is detected by the detection of the acceleration sensor 170. A power source for functioning as the measuring unit 166 is input. For example, the display 112 is displayed.

If walking is not performed for a certain period of time, the power supplied from the first power supply unit 162 to each unit including the acceleration sensor 170 is turned off, and the power supply to the acceleration sensor 170 is from the first power supply unit 162. 2 The power supply unit 164 is switched, and the acceleration sensor 170 returns to the measurement standby state of the acceleration information. As a result, when the pulse oximeter 100 is not functioning as a pedometer, it is possible to efficiently and automatically save power.

In addition to the above examples, the present embodiment can be modified in various ways. For example, in the above configuration and operation in the present embodiment, the patient as a user carries or wears the biological parameters and the amount of activity, but does not need to carry or wear the other when not measuring. It can also be realized in various biometric information measuring devices. For example, the configuration and operation of the present embodiment include all medical devices having a function of measuring the amount of activity such as a step count function and a function of measuring biological parameters such as percutaneous arterial oxygen saturation or pulse wave. Applicable.

Further, in the present embodiment, a portable pulse oximeter has been described as an example of the biometric information measuring device, but the biometric information measuring device may be a portable small electrocardiograph, an activity meter, or the like. It may be. As described in Japanese Patent Application Laid-Open No. 2007-209608, a portable small electrocardiograph is a main body provided with electrodes arranged so as to be in contact with a patient's measurement site (for example, hand and chest) when measuring a patient's electrocardiogram. Has. In this case, the detection unit has a configuration capable of detecting the contact of the measurement site with the electrode as a state change of the biological information measuring device related to the start of measurement of the biological parameter. The contact of the measurement site with the electrode can be detected, for example, by detecting the impedance change of the electrode when the measurement site contacts the electrode. The contact with the measurement site is detected by the plurality of electrodes at this time, and the control unit is started to measure the biological parameters via the electrodes. As a result, the electrocardiogram information is not acquired until it is attached to the measurement site, and the power consumption can be reduced.

The embodiments of the present invention have been described above. The above description is an example of a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto. That is, the description of the configuration of the device and the shape of each part is an example, and it is clear that various changes and additions to these examples are possible within the scope of the present invention.

The biological information measuring device according to the present invention can measure the amount of activity such as the number of steps, reduce power consumption, measure the amount of activity, and measure biological parameters such as percutaneous arterial oxygen saturation. It is useful as a portable pulse oximeter that has the effect of being able to be efficiently and suitably executed, is driven by a primary or secondary battery, and has a function of measuring the number of steps as an activity amount.

100 Pulse oximeter 110 Upper housing 112 Display 120 Lower housing 124 Data communication unit 125 Data storage unit 130 Hinge unit 140 Finger insertion port 150 Oxygen saturation measurement unit (Biological information measurement unit)
152 Light emitting element 154 Light receiving element 162 1st power supply unit 165 Clock / calendar function unit 164 2nd power supply unit 166 Step count measurement unit (activity measurement unit)
168 Open / close detection unit 170 Accelerometer 172 Magnetic sensor 174 Magnet 180 Control unit

Claims (5)

A biometric information measuring device that can be carried and used by the user.
A biometric information measuring unit that is attached to the measuring site of the user and measures the biometric information of the user.
An activity amount measuring unit having an acceleration sensor and measuring the activity amount of the user based on the output of the acceleration sensor.
A drive source that supplies power to the biological information measurement unit and the activity measurement unit to enable their respective measurements.
Have,
When a change in the state of the biological information measuring device is detected based on the output of the acceleration sensor, the drive source starts supplying power to the activity measuring unit, and the activity measuring unit starts supplying power to the activity measuring unit. While enabling measurement of activity, power is not supplied to the biometric information measurement unit.
Biological information measuring device. The biometric information measuring unit has a main body attached to the measuring site of the user.
The main body is provided with a detection unit that detects attachment to the measurement site.
When the detection unit detects that the drive source is attached to the measurement site, the drive source starts supplying power to the biometric information measurement unit, enabling the biometric information measurement unit to measure biometric information.
The biological information measuring device according to claim 1. When the movement of the biological information measuring device is detected based on the output of the acceleration sensor, the drive source starts supplying power to the detection unit and enables the detection unit to detect opening / closing. ,
The biological information measuring device according to claim 2. The amount of activity includes the number of steps.
The biometric information measuring device according to any one of claims 1 to 3. The biological information includes arterial oxygen saturation.
The biometric information measuring device according to any one of claims 1 to 4.

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