U.S. patent application number 13/168218 was filed with the patent office on 2011-10-20 for electronic sphygmomanometer and blood pressure measurement method.
This patent application is currently assigned to OMRON HEALTHCARE CO., LTD.. Invention is credited to Yukiya Sawanoi.
Application Number | 20110257538 13/168218 |
Document ID | / |
Family ID | 42287323 |
Filed Date | 2011-10-20 |
United States Patent
Application |
20110257538 |
Kind Code |
A1 |
Sawanoi; Yukiya |
October 20, 2011 |
ELECTRONIC SPHYGMOMANOMETER AND BLOOD PRESSURE MEASUREMENT
METHOD
Abstract
An electronic sphygmomanometer includes a cuff to be attached to
a blood pressure measurement site, a pump and a valve for adjusting
pressure to be applied on the cuff, a pressure sensor for detecting
pressure in the cuff, a central processing unit (CPU) for
calculating a blood pressure value from the cuff pressure, a memory
for recording the blood pressure value, and an operation unit for
carrying out a blood pressure measurement. A measurement condition
input switch acquires information related to a condition at the
time of current blood pressure measurement, and the memory stores
the condition as measurement record information along with the
blood pressure value. The CPU acquires past measurement record
information close to the condition at the time of the blood
pressure measurement from the memory and corrects a blood pressure
measurement parameter based on the measurement record
information.
Inventors: |
Sawanoi; Yukiya; (Nara-shi,
JP) |
Assignee: |
OMRON HEALTHCARE CO., LTD.
Kyoto-shi
JP
|
Family ID: |
42287323 |
Appl. No.: |
13/168218 |
Filed: |
June 24, 2011 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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PCT/JP2009/007232 |
Dec 25, 2009 |
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13168218 |
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Current U.S.
Class: |
600/490 |
Current CPC
Class: |
G01G 19/50 20130101;
G01G 23/16 20130101 |
Class at
Publication: |
600/490 |
International
Class: |
A61B 5/022 20060101
A61B005/022 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 26, 2008 |
JP |
2008-333402 |
Claims
1. An electronic sphygmomanometer comprising: a cuff to be attached
to a blood pressure measurement site; pressurization and
depressurization means for adjusting a pressure applied on the
cuff; pressure detection means for detecting the pressure in the
cuff; blood pressure calculating means for calculating a blood
pressure value from the cuff pressure; recording means for
recording the blood pressure value; operation means for carrying
out a blood pressure measurement; condition information acquiring
means for acquiring information related to a plurality of types of
various measurement conditions at a time of current blood pressure
measurement, wherein the recording means stores the various
measurement conditions at the time of the blood pressure
measurement acquired by the condition information acquiring means
as measurement record information along with the blood pressure
value; measurement record information acquiring means for acquiring
past measurement record information close to the various
measurement conditions at the time of the blood pressure
measurement from the recording means; and correcting means for
correcting a blood pressure measurement parameter based on the
measurement record information when the past measurement record
information close to the condition at the time of the blood
pressure measurement is acquired by the measurement record
information acquiring means, wherein the measurement record
information acquiring means preferentially extracts measurement
record information with greater matching measurement
conditions.
2. The electronic sphygmomanometer according to claim 1, wherein
the measurement record information acquiring means comprises
measurement record information in which a certain specific
condition and a few other conditions match as outside a target of
extraction if another certain specific condition is different.
3. The electronic sphygmomanometer according to claim 2, wherein
the recording means stores a matching measurement condition and a
measurement condition determined as outside the target of
extraction when the conditions are different in association with
each other.
4. A blood pressure measurement method for adjusting pressure to be
applied to a cuff with pressurization and depressurization means
when the cuff is attached to a blood pressure measurement site, and
calculating a blood pressure value by blood pressure calculating
means based on a cuff pressure detected by pressure detection
means, the blood pressure measurement method comprising the steps
of: acquiring information related to a plurality of types of
various measurement conditions at a time of current blood pressure
measurement with condition information acquiring means; storing the
various measurement conditions at the time of the blood pressure
measurement acquired by the condition information acquiring means
as measurement record information along with the blood pressure
value in a recording means; acquiring past measurement record
information close to the various measurement conditions at the time
of the blood pressure measurement from the recoding means by
measurement record information acquiring means; and correcting a
blood pressure measurement parameter based on measurement record
information by correcting means when the past measurement record
information close to the various measurement conditions at the time
of the blood pressure measurement is acquired by the measurement
record information acquiring means from the recording means,
wherein the step of acquiring measurement record information close
to the various measurement conditions by the measurement record
information acquiring means is comprises preferentially extracting
measurement record information with greater matching measurement
conditions.
5. The blood pressure measurement method according to claim 4,
wherein the step of acquiring measurement record information close
to the various measurement conditions by the measurement record
information acquiring means comprises measurement record
information in which a certain specific condition and a few other
conditions match as outside a target of extraction if another
certain specific condition is different.
6. The blood pressure measurement method according to claim 5,
wherein the step of storing in the recording means comprises
storing a matching measurement condition and a measurement
condition determined as outside the target of extraction when the
conditions are different in association with each other.
Description
TECHNICAL FIELD
[0001] The present invention relates to an electronic
sphygmomanometer including a cuff to be attached to a blood
pressure measurement site and a blood pressure calculation unit for
calculating a blood pressure value from a cuff pressure, and a
blood pressure measuring method using the same.
BACKGROUND ART
[0002] A blood pressure is one type of index for analyzing a
circulatory disease. Performing risk analysis based on the blood
pressure is effective in preventing cardiovascular related disease
such as apoplexy, cardiac arrest, and cardiac infarction.
Conventionally, a diagnosis for performing the risk analysis is
made from the blood pressure (occasional blood pressure) measured
in medical institutions at the time of hospital visits and
checkups. However, it is recognized from recent research that the
blood pressure (home blood pressure) measured at home is more
useful in diagnosing the circulatory disease than the occasional
blood pressure. Accompanied therewith, the sphygmomanometer used at
home is being widely used.
[0003] Most of the electronic sphygmomanometers currently being
widely used use the blood pressure calculation algorithm of the
oscillometric method or the microphone method.
[0004] In the oscillometric method, the change in arterial volume
that occurs when the cuff pressure is pressurized up to a
predetermined pressure (e.g., systolic blood pressure+30 mmHg), and
then gradually depressurized at a predetermined speed
(depressurization rate) is detected as a pressure pulse wave
amplitude, and a predetermined algorithm is applied on the change
in the pressure pulse wave amplitude to calculate a blood pressure
value. The change in arterial volume that occurs when gradually
pressurizing the cuff pressure at a predetermined speed
(pressurization rate) may be detected as a pressure pulse wave
amplitude, and a predetermined algorithm may be applied on the
change in the pressure pulse wave amplitude to calculate a blood
pressure value.
[0005] In the microphone method, the occurrence, attenuation, and
disappearance of a Korotkoff sound that occurs when the cuff
pressure is pressurized up to a predetermined pressure (e.g.,
systolic blood pressure+30 mmHg), and then gradually depressurized
at a predetermined speed (depressurization rate), are detected with
a microphone arranged in the cuff to determine the systolic blood
pressure and the diastolic blood pressure.
[0006] In either blood pressure calculation method, the
pressurization value needs to be pressurized to a cuff pressure
(e.g., systolic blood pressure+30 mmHg) sufficiently higher than
the systolic blood pressure. The depressurization rate and the
pressurization rate need to be set such that information on the
pressure pulse wave amplitude or the Kortkoff sound can be fully
obtained. Specifically, the depressurization rate or the
pressurization rate needs to be set according to the pulse rate of
the subject.
[0007] (Prior Art of Pressurization Value)
[0008] In current sphygmomanometers, methods such as (1) setting a
pressurization value with a switching switch before measurement
(see patent document 1), (2) estimating a systolic blood pressure
during pressurization, and setting a pressure obtained by adding a
predetermined pressure (e.g., 30 mmHg) to the estimated systolic
blood pressure as a pressurization value (see patent documents 2,
3), and (3) setting a pressure obtained by adding a predetermined
pressure (e.g., 30 mmHg) to an average value of the systolic blood
pressure values up to the previous measurement as a pressurization
value (see patent document 4) are adopted.
[0009] Patent Document 1: Japanese Unexamined Patent Publication
No. 62-66835
[0010] Patent Document 2: Japanese Patent Publication No.
2842696
[0011] Patent Document 3: Japanese Patent Publication No.
3393432
[0012] Patent Document 4: Japanese Unexamined Patent Publication
No. 2005-185681
SUMMARY OF INVENTION
[0013] The blood pressure greatly changes by factors such as
measuring time, day of the week, season, environment, stress,
illness, various actions related to lifestyle habits (meal,
exercise, smoking, rest), and the like. Thus, a user's systolic
blood pressure needs to be known in advance for the method of (1),
but may not necessarily be set correctly even if the pressurization
value is set based on the previously measured blood pressure value
because the blood pressure greatly fluctuates every time the
measurement is carried out.
[0014] Similarly, in the method of (3), a user's systolic blood
pressure may not necessarily be set correctly even if an average
value or the like of a plurality of measurement results is
used.
[0015] Furthermore, when calculating the blood pressure while
depressurizing the cuff pressure, the pressurization of the cuff
pressure needs to be carried out at as high of a speed as possible
in order to achieve an accurate blood pressure measurement.
[0016] If pressurization is carried out at low speed, the blood
retains (congestion) at the peripheral side (forearm in the case of
the upper arm measurement) of the measurement site before the
artery is completely closed, and an accurate measurement becomes
impossible to carry out. Therefore, the pressurization rate is set
at as high of a speed as possible, but as a consequence, the pulse
wave information obtained during the pressurization becomes less,
and the error of the estimated systolic blood pressure becomes
large in the method of (2), and hence, the pressurization value may
not be correctly set.
[0017] Therefore, one or more embodiments of the present invention
provides an electronic sphygmomanometer and a blood pressure
measurement method capable of setting an optimum blood pressure
measurement parameter for every user by correcting a blood pressure
measurement parameter based on past measurement recorded
information close to the conditions at the time of the blood
pressure measurement, and enhancing the satisfaction level of the
user.
[0018] According to one or more embodiments of the present
invention, an electronic sphygmomanometer includes a cuff to be
attached to a blood pressure measurement site, pressurization and
depressurization means for adjusting pressure to be applied on the
cuff, pressure detection means for detecting pressure in the cuff,
blood pressure calculating means for calculating a blood pressure
value from the cuff pressure, recording means for recording the
blood pressure value, and operation means for carrying out
operations such as blood pressure measurement, the electronic
sphygmomanometer including condition information acquiring means
for acquiring information related to a plurality of types of
various measurement conditions at the time of current blood
pressure measurement, the recording means being configured to store
the various measurement conditions at the time of the blood
pressure measurement acquired by the condition information
acquiring means as measurement record information along with the
blood pressure value; measurement record information acquiring
means for acquiring past measurement record information close to
the various measurement conditions at the time of the blood
pressure measurement from the recording means; and correcting means
for correcting a blood pressure measurement parameter based on the
measurement record information if the past measurement record
information close to the conditions at the time of the blood
pressure measurement is acquired by the measurement record
information acquiring means; wherein the measurement record
information acquiring means is configured to preferentially extract
measurement record information with greater matching measurement
conditions.
[0019] The blood pressure measurement parameter may be a
pressurization set value.
[0020] The blood pressure measurement parameter may be a
depressurization rate.
[0021] The blood pressure measurement parameter may be a
pressurization rate.
[0022] According to one or more embodiments of the present
invention, the measurement record used when setting the condition
at the time of the blood pressure measurement is the most recent
record of the measurement records close to the current measurement
condition.
[0023] According to one or more embodiments of the present
invention, the measurement record used when setting the condition
at the time of the blood pressure measurement is the statistical
calculation result of a plurality of records from the most recent
record of the measurement records close to the current measurement
condition.
[0024] According to one or more embodiments of the present
invention, the measurement record used when setting the condition
at the time of the blood pressure measurement is the statistical
calculation result of all records of the measurement records close
to the current measurement condition.
[0025] According to one or more embodiments of the present
invention, the optimum blood pressure measurement parameter can be
set for every user.
[0026] According to one or more embodiments of the present
invention, the measurement record information acquiring means may
be configured to have measurement record information in which a
certain specific condition and a few other conditions match as
outside target of extraction if another certain specific condition
is different.
[0027] Further, according to one or more embodiments of the present
invention, the recording means may be configured to store a
matching measurement condition and a measurement condition
determined as outside the target of extraction when the condition
is different in association to each other.
[0028] The condition at the time of the blood pressure measurement
may be a measurement condition such as the measurement place, the
illness information, the dosing status, the exercise content and
the lifestyle habit information.
[0029] The lifestyle habit information includes various types of
information such as before meal, after meal, after exercise, after
smoking, rest (break), and the like.
[0030] One or more embodiments of the present invention provides a
blood pressure measurement method for adjusting pressure to be
applied to a cuff with pressurization and depressurization means
when the cuff is attached to a blood pressure measurement site, and
calculating a blood pressure value by blood pressure calculating
means based on a cuff pressure detected by pressure detection
means, the blood pressure measurement method including the steps of
acquiring information related to a plurality of types of various
measurement conditions at the time of current blood pressure
measurement with condition information acquiring means; storing the
various measurement conditions at the time of the blood pressure
measurement acquired by the condition information acquiring means
as measurement record information along with the blood pressure
value in the recording means; and correcting a blood pressure
measurement parameter based on measurement record information by
correcting means when the past measurement record information close
to the various measurement conditions at the time of the blood
pressure measurement is acquired by the measurement record
information acquiring means from the recording means; wherein the
step of acquiring measurement record information close to the
various measurement conditions by the measurement record
information acquiring means is configured to preferentially extract
measurement record information with greater matching measurement
conditions.
[0031] According to one or more embodiments of the present
invention, the process of setting the optimum blood pressure
measurement parameter for every user can be executed.
[0032] According to one or more embodiments of the present
invention, the step of acquiring measurement record information
close to the various measurement conditions by the measurement
record information acquiring means may be configured to have
measurement record information in which a certain specific
condition and a few other conditions match as outside target of
extraction if another certain specific condition is different.
[0033] According to one or more embodiments of the present
invention, the step of storing in the recording means may be
configured to store a matching measurement condition and a
measurement condition determined as outside the target of
extraction when the condition is different in association to each
other.
[0034] According to one or more embodiments of the present
invention, an electronic sphygmomanometer and a blood pressure
measurement method capable of setting the optimum blood pressure
measurement parameter for every user are provided, and the
satisfaction level of the user is enhanced.
BRIEF DESCRIPTION OF THE DRAWINGS
[0035] FIG. 1 is a block diagram showing an electronic
sphygmomanometer according to one or more embodiments of the
present invention.
[0036] FIG. 2 is a flowchart showing an example of a blood pressure
measurement operation according to one or more embodiments of the
present invention.
[0037] FIG. 3 is a table showing data associated with date and
time, measurement value, and measurement condition (dosing
status).
[0038] FIG. 4 is a table showing data associated with date and
time, measurement value, and temperature at time of
measurement.
[0039] FIG. 5 is a table showing data associated with date and
time, measurement value, and measurement condition (lifestyle habit
information).
[0040] FIG. 6 is a table showing data associated with date and
time, measurement value, measurement condition (measurement
place).
DETAILED DESCRIPTION OF INVENTION
[0041] Embodiments of the present invention will be described below
with reference to the drawings.
[0042] As shown in FIG. 1, an electronic sphygmomanometer 2600
according to one or more embodiments of the present invention
includes a cuff 2101, an air tube 2102, a pressure sensor 2103, a
pump 2104, a valve 2105, an oscillation circuit 2111, a pump drive
circuit 2112, a valve drive circuit 2113, a timing unit 2115, a
power supply 2116, a CPU 2120, a display unit 2121, a memory (for
processing) 2122, a memory (for recording) 2123, an operation unit
2630, an interface 2171, and a recoding medium 2172.
[0043] FIG. 1 is a block diagram showing a configuration of the
electronic sphygmomanometer 2600 according to one or more
embodiments of the present invention.
[0044] The cuff 2101 is a band shaped member that is connected to
the air tube 2102 and that is attached to a blood pressure
measurement site of the user to pressurize by air pressure.
[0045] The pressure sensor 2103 is an electrostatic capacitance
type pressure sensor, in which a capacitance value changes
according to the pressure in the cuff (cuff pressure).
[0046] The pump 2104 and the valve 2105 apply pressure to the cuff
and adjust (control) the pressure in the cuff.
[0047] The oscillation circuit 2111 outputs a signal of the
frequency corresponding to the capacitance value of the pressure
sensor 2103.
[0048] The pump drive circuit 2112 and the valve drive circuit 2113
drive the pump 2104 and the valve 2105, respectively.
[0049] The timing unit 2115 is a device for timing the current date
and time, and transmitting the timed date and time to the CPU 2120
as necessary.
[0050] The power supply 2116 supplies power to each configuring
unit.
[0051] The CPU 2120 executes the control of the pump 2104, the
valve 2105, the display unit 2121, the memories 2122, 2123, the
operation unit 2630, [[and]] the interface 2171, the blood pressure
determination process, and the management of the recording
values.
[0052] The display unit 2121 is configured by a display device such
as a liquid crystal screen, and displays the blood pressure value
according to a signal transmitted from the CPU 2120.
[0053] The memory (for processing) 2122 stores the control program
or the like of the sphygmomanometer.
[0054] The memory (for recording) 2123 stores the blood pressure
value and also stores the date and time, the measurement value, and
the measurement condition by association.
[0055] In addition to the power supply switch 2131, the measurement
switch 2132, the stop switch 2133, and the record callout switch
2141, the operation unit 2630 also includes a measurement condition
input switch 2641 for inputting measurement conditions, where
operation input such as power ON/OFF of the sphygmomanometer and
start of measurement is permitted, and the inputted input signal is
transmitted to the CPU 2120.
[0056] The interface 2171 executes recording/readout of the blood
pressure value with respect to the recording medium 2172 according
to the control of the CPU 2120.
[0057] The measurement condition input switch 2641 is configured to
permit the input of a dosing status of whether or not after dosing
for the measurement condition.
[0058] The blood pressure measurement operation using the
electronic sphygmomanometer 2600 configured as above will be
described according to the flowchart of FIG. 2.
[0059] FIG. 2 is a flowchart showing the blood pressure measurement
operation according to one or more embodiments of the present
invention.
[0060] First, when the power supply switch of the sphygmomanometer
is pushed (step S2601), the CPU 2120 initializes the operation
memory of the sphygmomanometer, and carries out 0 mmHg adjustment
of the pressure sensor 2103 (step S2602).
[0061] After the initialization process is terminated, the
measurement conditions such as after dosing are input (step S2603)
and the measurement switch is pushed (step S2604), so that the CPU
2120 acquires the current date and time from the timing unit 2115
(step S2605), and determines one or more of the blood pressure
measurement parameters such as the pressurization value, the
pressurization rate, and the depressurization rate (step S2606).
The method of determining the blood pressure measurement parameter
in step S2606 will be described later.
[0062] The cuff pressure is then pressurized up to a predetermined
pressurization value by the pump 2104 (steps S2607 to S2608). The
pressurization rate and the pressurization value used here are the
pressurization rate and the pressurization value determined in step
S2606.
[0063] After pressurizing up to the predetermined pressurization
value, the CPU 2120 gradually depressurizes the cuff pressure with
the valve 2105 (step S2609). The CPU 2120 extracts the pressure
change component involved in the volume change of the artery
superimposed on the cuff pressure obtained during the
depressurization, and calculates a blood pressure through a
predetermined calculation (step S2610). After calculating the blood
pressure (step S2611: YES), the CPU 2120 opens the valve 2105 and
exhausts the air in the cuff. The CPU 2120 displays the calculated
blood pressure value on the display unit 2121 (step S2612), and
records the same in the memory (for recording) 2123 in association
with the date and time, the measurement value, and the measurement
condition (dosing status) (step S2613).
[0064] In step S2606, the CPU 2120 determines the blood pressure
measurement parameter in the following manner.
[0065] (When Blood Pressure Measurement Parameter is Pressurization
Value)
[0066] The pressurization value generally needs to be set to a cuff
pressure sufficiently higher than the systolic blood pressure.
Specifically, the pressurization needs to be pressurized up to
about systolic blood pressure+30 mmHg.
[0067] The pressurization value is set based on the recorded
measurement data. Specifically, the CPU 2120 calls out a table as
shown in FIG. 3 recorded in the memory (for recording) 2123. The
table recorded in the memory (for recording) 2123 used herein
records the measurement date and time ("YY (year)/MM (month)/DD
(date)" . . . "hh (hour):mm (minute)" . . . in the figure), dosing
status (measurement condition "after dosing" in the figure), and
each measurement value such as blood pressure value and pulse rate
("SYS1 (systolic blood pressure)", "DIA1 (diastolic blood
pressure)", "PLS1 (pulse rate)" in the figure) in association with
each other as shown in FIG. 3.
[0068] The CPU 2120 then extracts the data closest to the current
measurement date and time and/or the data in which the measurement
condition indicating the dosing status or the like such as whether
or not after dosing is the same from the measurement data recorded
in the table.
[0069] The CPU 2120 sets the pressure obtained by adding 30 mmHg to
the systolic blood pressure of the most recent data of the
measurement data that matches with the above condition as the
pressurization value.
[0070] When referring to closest to the measurement date and time,
this means that at least one or more of the conditions including
same measurement month, measurement of the same week, measurement
of the same day of the week, and measurement of the same time
matches with each other.
[0071] Not limited to using the systolic blood pressure of the most
recent data of the measurement data that matches with the above
conditions as described above, an average value of the systolic
blood pressures of a plurality of measurement data that matches
with the conditions may be used, and the pressure in which 30 mmHg
is added to such average value may be set as the pressurization
value.
[0072] Alternatively, a representative value of the systolic blood
pressure of a plurality of measurement data that matches with the
conditions may be used, and the pressure in which 30 mmHg is added
to such representative value may be set as the pressurization
value.
[0073] The representative value may be a maximum value, a median
value, or the like of the plurality of data.
[0074] Furthermore, when the measurement data that matches with the
measurement condition does not exist such as in the initial use of
the sphygmomanometer, the pressurization value (e.g., 180 mmHg)
determined in advance may be set. The systolic blood pressure may
be estimated during the pressurization, and the pressure in which
30 mmHg is added to such estimated value may be set as the
pressurization value, as described in patent documents 2, 3.
[0075] (When Blood Pressure Measurement Parameter is
Depressurization Value)
[0076] The depressurization rate needs to be set to a speed at
which the pulse wave amplitude information can be acquired in just
proportion by the number necessary for the blood pressure
calculation. The necessary number of pulse wave amplitude
information is appropriately five or more, as described in Japanese
Patent Publication. No. 3149873. As described in the same patent
number, the depressurization rate that satisfies the same can be
calculated by the systolic blood pressure (SYS), the diastolic
blood pressure (DIA), and the pulse rate (PLS).
[0077] Similar to the pressurization value, the data closest to the
current measurement date and time and/or the data in which the
measurement condition is the same from the recorded measurement
data is extracted, and the depressurization rate may be calculated
based on the systolic blood pressure, diastolic blood pressure, and
the pulse rate recorded in the relevant data.
[0078] Similar to the pressurization value, if the measurement data
that matches with the measurement condition does not exist such as
in the initial use of the sphygmomanometer, the depressurization
rate (e.g., 5.5 mmHg/sec) determined in advance may be set.
Alternatively, as described in Japanese Patent Publication No.
3149873, the systolic blood pressure, the diastolic blood pressure,
and the pulse rate may be estimated during the pressurization, and
the depressurization rate calculated by such estimated value may be
set.
[0079] The sphygmomanometer according to one or more embodiments of
the present invention adopts a method of calculating the blood
pressure during depressurization, but other embodiments may be
directed to a sphygmomanometer of a method of calculating the blood
pressure during pressurization.
[0080] In this case, the pressurization rate may be determined
instead of the depressurization rate. The determining method is
similar to the depressurization rate, and thus, the description
thereof will be omitted.
[0081] The blood pressure changes depending on the surrounding
environment such as the temperature at the time of the measurement.
In the electronic sphygmomanometer, the blood pressure is measured
with the dosing status as the measurement condition, but the
measurement condition is not limited to the dosing status and may
be the measurement date and time or the temperature at the time of
the measurement. In this case, as shown in FIG. 4, a table in which
the measurement date and time, the temperature (temperature at the
time of measurement "25.degree. C." in the figure) at the time of
the measurement, and each measurement value such as the blood
pressure value and the pulse rate are recorded in the memory 2123.
The temperature changes by date (season) and time, and thus, only
the measurement date and time and each measurement value may be
recorded in association with each other in the memory 2123.
[0082] In this case, the user may input the information of the
temperature using the measurement condition input switch 2641, or
temperature measurement means may be incorporated in the electronic
sphygmomanometer 2600 to acquire the information of the temperature
based on the detection result of the relevant means.
[0083] The measurement condition is not limited to the dosing
status, and may be information related to dosing such as type of
drug being taken, or at least one of exercise content information
such as dosing information, measurement place, illness information,
or to what extent what kind of exercise is carried out, or
lifestyle habit information related to meal, exercise, smoking,
rest (break) or the like may be used as the measurement condition.
In this case, the measurement condition input switch 2641 is
configured such that various types of information may be input.
[0084] For instance, the blood pressure changes depending on
various types of actions related to the lifestyle habit, and there
is a difference in the blood pressure between before meal and after
meal, after exercise and during rest, and before smoking and after
smoking. As shown in FIG. 5, a table in which the measurement date
and time ("Y1 (year)/M1 (month)/D1 (day)" . . . , "h1 (hour):m1
(minute)" . . . in the figure), the lifestyle habit information
(measurement condition "after meal", "after exercise", "after
smoking", and "during rest" . . . in the figure), and each
measurement value such as the blood pressure value and the pulse
rate are associated with each other may be used for the table
recorded in the memory 2123.
[0085] There is a difference in blood pressure from the
psychological stress the user is subjected to at the time of the
measurement. Therefore, it is assumed that the difference occurs in
the blood pressure from the measurement place, which is one
measurement condition. For instance, the user is in a relaxed state
in which there is barely any stress at home and is often in a state
of great stress at the office, so that a difference may be
generated in the measurement result between when the blood pressure
measurement is carried out at home and when the blood pressure
measurement is carried out at the office.
[0086] A table in which the measurement date and time, the
measurement place (measurement place "home", "office", "hospital"
etc. in the figure), and each measurement value such as blood
pressure value and pulse rate are associated with each other, as
shown in FIG. 6, may be used as a table to record in the memory
2123.
[0087] As described above, an electronic sphygmomanometer 2600
includes biological information acquiring means for measuring a
blood pressure value, recording means (memory 2123) for recording
the blood pressure value, means (memory 2122) for storing a control
program of the sphygmomanometer, or the like, operation means
(operation unit 2630) for carrying out operations such as blood
pressure measurement, correcting means (CPU 2120) for correcting
the biological information acquired by the biological information
acquiring means based on separately acquired correction
information, and output means (display unit 2121) for outputting
the corrected information (blood pressure value) after the
correction, and further including a cuff 2101 to be attached to a
blood pressure measurement site, pressurization and
depressurization means 2104, 2105 for adjusting pressure to be
applied on the cuff 2101, pressure detection means (pressure sensor
2103) for detecting pressure in the cuff, and blood pressure
calculating means (CPU 2120) for calculating the blood pressure
value from the cuff pressure, the electronic sphygmomanometer
further including condition information acquiring means
(measurement condition input switch 2641) for acquiring information
related to the condition at the time of the current blood pressure
measurement, the recording means being configured to store the
condition at the time of the blood pressure measurement acquired by
the condition information acquiring means as the measurement record
information along with the blood pressure value, and measurement
record information acquiring means (CPU 2120 that executes step
S2606) for acquiring the past measurement record information close
to the condition at the time of the blood pressure measurement from
the recording means as the correction information, where the
correcting means (CPU 2120 that executes step S2606) is configured
to correct a blood pressure measurement parameter based on the past
measurement record information close to the condition at the time
of the blood pressure measurement.
[0088] According to one or more embodiments of the present
invention, the optimum blood pressure measurement parameter can be
set for every user.
[0089] Furthermore, an appropriate blood pressure measurement
parameter corresponding to the change in blood pressure caused by
the difference in the surrounding environment (temperature herein)
at the time of the measurement may be obtained by correcting the
blood pressure measurement parameter with the condition at the time
of the blood pressure measurement as the measurement date and time
or as the temperature at the time of the measurement.
[0090] The measurement condition input switch 2641 serving as input
means for inputting the condition at the time of the blood pressure
measurement is arranged in the operation unit 2630 as the condition
information acquiring means, and the condition input to the
measurement condition input switch 2641 is recorded in the memory
2123 with the blood pressure value, so that various types of
information relevant to the factors that change the blood pressure
can be easily acquired. Thus, the appropriate blood pressure
measurement parameter that takes into consideration each factor
thus can be set.
[0091] According to one or more embodiments of the present
invention, the blood pressure measurement parameter is corrected
focusing on one of the dosing status, temperature, lifestyle habit
information, measurement place and the like, which are the
conditions at the time of the blood pressure measurement, but are
not necessarily limited thereto, and some of the various
measurement conditions may be combined. In this case, a more
appropriate blood pressure measurement parameter can be set by
using the measurement record information in which various
measurement conditions match with each other.
[0092] Therefore, when a configuration of using the measurement
record information in which a plurality of measurement conditions
match with each other is adopted, the measurement record
information with more matching measurement conditions is to be
preferentially extracted.
[0093] However, a difference may possibly occur in the blood
pressure value in a case where the measurement time (morning,
night), or timing of measurement (after meal, before meal, etc.) is
different even if dosing status and a few other measurement
conditions match with each other.
[0094] The measurement record information in which a certain
specific condition and a few other conditions match with each other
may be outside the target of extraction in a case where another
certain specific condition is different. In this case, a table in
which the matching measurement condition and the measurement
condition determined as outside the target of extraction when the
conditions are different are associated with each other is recorded
in the memory 2123, or the like, and the CPU 2120 may determine the
measurement record information as outside the target of extraction
when the measurement condition determined as outside the target of
extraction is different.
[0095] As described above, the electronic sphygmomanometer 2600
according to one or more embodiments of the present invention
includes input means (measurement condition input switch 2641) for
inputting measurement conditions in the operation means (operation
unit 2630), and records the measurement condition such as the
measurement place, the illness information, the dosing status, and
the exercise with the blood pressure value in the recording means
(memory 2122, 2123).
[0096] Embodiments of the present invention are not limited only to
the above-described embodiments, and a great number of embodiments
can be realized.
[0097] For example, the electronic sphygmomanometer 2600 may be
configured to download an appropriate parameter, threshold value,
algorithm, or the like from a dedicated server to expand the
function. In this case, the version of the software may be upgraded
with the hardware as is, or optimization can be easily realized by
the user himself/herself.
[0098] The function expansion of the electronic sphygmomanometer
2600 may be executed from a user terminal such as a personal
computer possessed by the user without using the server. In this
case, the parameter, the threshold value, the algorithm, and the
like may be downloaded from a recording medium such as a
CD-ROM.
[0099] The electronic sphygmomanometer 2600 may be directly and
communicably connected wirelessly or by wire to other biological
information acquiring device such as a body composition meter, a
pedometer, or an electronic thermometer. In this case as well, data
may be mutually transmitted and received to enhance the individual
accuracy.
[0100] Embodiments of the present invention can be used in the
electronic sphygmomanometer adopting the oscillometric method that
uses the cuff or the microphone method.
[0101] While the invention has been described with respect to a
limited number of embodiments, those skilled in the art, having
benefit of this disclosure, will appreciate that other embodiments
can be devised which do not depart from the scope of the invention
as disclosed herein. Accordingly, the scope of the invention should
be limited only by the attached claims.
DESCRIPTION OF REFERENCE NUMERALS
[0102] 2600 electronic sphygmomanometer [0103] 2101 cuff [0104]
2103 pressure sensor [0105] 2104 pump [0106] 2105 valve [0107] 2115
timing unit [0108] 2120 CPU [0109] 2121 display unit [0110] 2122
memory (for processing) [0111] 2123 memory (for recording) [0112]
2630 operation unit [0113] 2641 measurement condition input
switch
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