JP2012137328A - Electronic clinical thermometer and control method of electronic clinical thermometer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic clinical thermometer which indicates a body temperature value by a general prediction of an equilibrium temperature when measuring a body temperature of a subject having a normal body temperature and is capable of quickly and accurately measuring a body temperature of a subject having a body temperature out of a normal range.SOLUTION: An electronic clinical thermometer has a prediction part which predicts an equilibrium temperature based on change with time of actual measured temperature value detected at a measurement region by a temperature detecting element. When the actual measured value is in a prediction performing temperature range which is a temperature range in which prediction of body temperature can be performed, a prediction process by the prediction part is performed and a prediction value is displayed in a display part. If it is determined that no prediction is made in the prediction process by the prediction part, actual measured value is displayed in the display part.

Description

  The present invention relates to an electronic thermometer that measures the body temperature of a subject. In particular, the present invention relates to an electronic thermometer with a wide temperature measurement range.

  2. Description of the Related Art Conventionally, an electronic thermometer that measures a body temperature of a subject, predicts an equilibrium temperature from the obtained temperature value, and displays a predicted value is widely used (Patent Document 1). In this type of electronic thermometer, the equilibrium temperature is predicted based on the change over time of the actual measured value of the measurement site detected by the thermometer, so that the measurement result of the body temperature of the subject can be presented quickly.

JP 2007-024531

  In the electronic thermometer, the prediction algorithm is adjusted so that the equilibrium temperature can be predicted quickly and accurately at normal body temperature or fever. Accordingly, the effective measurement temperature range is approximately 35 ° C. to 42 ° C., and when the actual measurement value falls below or exceeds this measurement temperature range, the measurement error ends. Therefore, for example, if an attempt is made to measure the body temperature of a subject who suffers from hypothermia or heat stroke using an electronic thermometer of a general equilibrium temperature prediction formula, a measurement error occurs. That is, such an electronic thermometer could not be used for the purpose of measuring the body temperature of a subject who suffered from hypothermia or heat stroke. In addition, hypothermia here is a pathological condition in which the body temperature is lowered to 35 ° C. or lower for some reason, 33 to 30 ° C. (moderate), 30 to 25 ° C. (severe), 25 to 20 ° C. (serious: Coma, asphyxia), 20 ° C or less (very serious: almost dead).

  The present invention has been made in view of the above problems, and when measuring the body temperature of a subject having normal body temperature, the body temperature measurement value is presented by prediction of a general equilibrium temperature, and is outside the range of normal body temperature. It is an object of the present invention to provide an electronic thermometer that can quickly and accurately measure a body temperature for a subject and a control method thereof.

In order to achieve the above object, an electronic thermometer according to an aspect of the present invention has the following arrangement. That is,
An electronic thermometer having a predicting means for predicting an equilibrium temperature based on a change with time of an actual measurement value of a temperature at a measurement site detected by a temperature measuring element,
A first display control unit configured to execute a prediction process by the prediction unit and display the predicted value on a display unit when the actual measurement value is in a predicted execution temperature range that is a temperature range in which body temperature prediction can be performed;
Determining means for determining whether or not the prediction in the prediction process is established;
A second display control unit configured to display the actual measurement value on the display unit when the determination unit determines that the prediction in the prediction process has been established;

  ADVANTAGE OF THE INVENTION According to this invention, the electronic thermometer which can perform a rapid and accurate body temperature measurement also to the subject outside the range of normal body temperature can be provided. In addition, when the body temperature of a subject having a normal body temperature is measured, the body temperature measurement value can be displayed by predicting a general equilibrium temperature, and an electronic thermometer capable of quickly and accurately measuring the body temperature can be provided.

The figure which shows the external appearance structure of the electronic thermometer by embodiment. The internal block diagram which shows the function structure of the electronic thermometer by embodiment. The flowchart which shows the body temperature measurement process in an electronic thermometer. The flowchart which shows the body temperature measurement process in an electronic thermometer. The flowchart which shows the body temperature measurement process in an electronic thermometer. The figure explaining the relationship between a measured value and a body temperature display. The figure explaining the operation example at the time of measuring the test subject who has the body temperature of a normal range. The figure explaining the operation example at the time of measuring the test subject at the time of hypothermia. The figure explaining the operation example at the time of measuring the test subject at the time of hypothermia. The figure explaining the operation example at the time of measuring the test subject at the time of hypothermia. The figure explaining the operation example at the time of measuring the test subject at the time of hyperthermia. The figure explaining the operation example at the time of measuring the test subject at the time of hyperthermia.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, but the scope of the present invention is not limited thereto, and can be appropriately changed.

1. FIG. 1 is a diagram showing an external configuration of an electronic thermometer 100 according to an embodiment of the present invention. FIG. 1 (a) is a plan view, and FIG. 1 (b) is a plan view of a back surface. Each is shown. Reference numeral 101 denotes a main body case in which an electronic circuit such as an arithmetic control unit 220 described later with reference to FIG. FIG. 1C shows display contents on the display unit.

  Reference numeral 102 denotes a stainless steel metal cap, in which a thermistor 213 for measuring temperature (details will be described later with reference to FIG. 2) and the like are housed, and has liquid tightness. Reference numeral 103 denotes a cap of the main body case 101. The main body case 101 accommodates the magnet reed switch 260 (FIG. 2), the substrate on which the electronic circuit is mounted, a buzzer, a battery, and the like, and is liquid-tight by ultrasonic waves along the 103a. Fused. For this reason, when the electronic thermometer 100 is taken out of a storage case (not shown) containing a permanent magnet, the magnet reed switch 260 is turned on. Until the electronic thermometer 100 is stored in the storage case, power is continuously supplied from the power supply unit 250 (battery) in FIG. 2 to the electronic circuit such as the calculation control unit 220, the temperature measurement unit 210, the display unit 230, and the like. The thermometer 100 is turned on. A power ON / OFF switch (not shown) may be provided so that the power supply unit 250 is turned on when pressed once, and the power supply unit 250 is turned off when pressed again. Further, the cap 103 may be removable so that the battery as the power supply unit 250 can be replaced.

  Reference numeral 104 denotes a display window. The display window is formed of a transparent thermoplastic resin, and is molded in two colors with the opening 104a of the main body case 101 to be liquid-tight. An internal display unit 230 (LCD) displays the body temperature of the subject through the display window 104. As shown in FIG. 1C, on the display unit 230, the temperature measurement value is displayed by the numerical display unit 111. Further, the prediction mark 112 is turned on or blinked when the value displayed on the numerical value display unit 111 is a predicted value, and turned off in other cases. The battery voltage drop mark 113 indicates that the supply voltage from the power supply unit 250 has dropped. When the battery voltage drop mark 113 blinks, it indicates that the remaining battery level is low, and during continuous lighting, the remaining battery level is insufficient and the electronic thermometer 100 cannot be used. The wide range mark 114 is lit or blinked when the measured temperature is outside the verification range or to explicitly indicate switching of the measurement mode.

  In order to have liquid-tightness, the display window and the body case 101 are preferably formed by two-color molding. The main body case 101 and the cap 103 are made of a styrene resin (high impact polystyrene, ABS resin), a polyolefin resin (polypropylene, polyethylene), or the like, which is a thermoplastic material having impact resistance and chemical resistance. Moreover, in order to give an antibacterial property, you may shape | mold so that a silver phosphate silver compound may be contained about 1 to 2.5 weight%. In addition, 101 a provided on the back surface of the main body case 101 is a protrusion provided along the longitudinal center line of the main body case 101, and 101 b is a width of the main body case 101 along the longitudinal center line of the main body case 101. It is a half-moon plane part provided in the part, and the rolling of the main body case 101 is prevented by the interaction between the projection part 101a and the plane part 101b.

2. Functional Configuration of Electronic Thermometer FIG. 2 is an internal block diagram showing the functional configuration of the electronic thermometer 100 according to the present embodiment.

  The electronic thermometer 100 includes a temperature measurement unit 210 that outputs a signal corresponding to temperature and a computer, performs various processes based on the signal output from the temperature measurement unit 210, calculates the body temperature of the subject, and electronically The calculation control part 220 which controls operation | movement of the thermometer 100 whole, the display part 230 which displays the calculated body temperature of the subject, the buzzer 240, and the power supply part 250 are provided. In addition to or instead of the buzzer 240, an audio output unit 105 may be provided. The voice output unit 105 outputs the body temperature value measured by the synthesized voice stored in the voice storage IC (not shown) by voice based on the processing in the arithmetic control unit 220. As described above, the power supply unit 250 supplies power to each part of the electronic thermometer 100 via the magnet reed switch 260.

  The temperature measurement unit 210 includes a thermistor (measuring resistance element) 213, a reference resistance element 215, a capacitor 214, and an RT conversion circuit 211, and includes an ON signal corresponding to the temperature (ON time corresponding to the temperature). Signal that changes). Note that the configuration of the temperature measurement unit 210 is not limited to that using such an RT conversion circuit. For example, a configuration may be employed in which a CR oscillation circuit is formed using the thermistor 213 and the capacitor 214 to obtain a frequency signal corresponding to the temperature.

  The arithmetic control unit 220 includes a counter 222 that measures the ON time of the signal output from the temperature measurement unit 210. The counter 222 counts the clock generated by the clock generation unit 228 in the control circuit 221 and measures the ON time based on the obtained count value and the frequency of the clock.

  The arithmetic control unit 220 includes an arithmetic processing unit 223. The arithmetic processing unit 223 calculates a temperature data based on the time measured by the counter 222 by executing a program stored in the ROM 224, and stores the calculated temperature data in the RAM 226 in time series. The body temperature of the subject is predicted based on the time change of the temperature data, and the hypothermia measurement process described later is performed. In the case of the configuration having the audio output unit 105, predetermined audio data is stored in the EEPROM 225, and the arithmetic processing unit 223 outputs audio data from the audio output unit 105 using this audio data. In addition, the calculation control unit 220 includes a display control unit 227 for controlling the display unit 230 that displays the calculation result in the calculation processing unit 223. The arithmetic control unit 220 further includes a control circuit 221 that controls the counter 222, the display control unit 227, the arithmetic processing unit 223, and the temperature measurement unit 210. The display control unit 227 has a function as a first display control unit that displays a predicted value to be described later on the display unit and a second display control unit that displays an actual measurement value on the display unit.

3. Flow of Body Temperature Measurement Processing in Electronic Thermometer 3.1 Overall Flow of Body Temperature Measurement Processing in Electronic Thermometer Next, the flow of body temperature measurement processing in electronic thermometer 100 of the present embodiment having the above-described configuration will be described.

  3 to 5 are flowcharts showing the flow of the body temperature measurement process in the electronic thermometer 100. Hereinafter, the flow of the body temperature measurement process in the electronic thermometer 100 will be described with reference to FIGS. The processes shown in FIGS. 3 to 5 are executed by, for example, the arithmetic processing unit 223 that determines and controls in each operation process.

  When the magnet reed switch 260 is turned on, or when the power supply unit 250 of the electronic thermometer 100 is turned on by manual operation of a power ON / OFF switch (not shown), the electronic thermometer 100 is initialized, and the thermometer The temperature measurement by the thermistor 213 is started. For example, the arithmetic processing unit 223 calculates temperature data at a predetermined time interval, for example, every 0.5 seconds.

  The arithmetic processing unit 223 displays on the display unit 230 a display form different from the actually measured temperature value, for example, “88” until the measured temperature value becomes equal to or higher than the display start temperature (20 ° C. in the present embodiment). .8 "is displayed (steps S301 and S302). When the measured temperature value is equal to or higher than the display start temperature, the arithmetic processing unit 223 starts the timer T1 (step S303). The timer T1 measures the time from the start of temperature display on the display unit 230.

  Next, the arithmetic processing unit 223 determines whether or not the measured temperature value is equal to or higher than the predicted start temperature (30 ° C. in the present embodiment). If the predicted start temperature has not been reached, “process at less than 30 ° C.” which is a process lower than the predicted start temperature is executed (steps S304 and S400). Note that the “processing at less than 30 ° C.” will be described later with reference to the flowchart of FIG. On the other hand, when the measured temperature value is equal to or higher than the predicted start temperature, the arithmetic processing unit 223 starts the body temperature prediction process (step S305). The body temperature prediction process is a process for predicting the equilibrium temperature based on the change over time of the actual measured value of the temperature at the measurement site detected by the thermometer (thermistor 213). Since the body temperature prediction process is well known, detailed description is omitted. Following the start of the body temperature prediction process, the arithmetic processing unit 223 starts a timer T2 for measuring the time from the start of the body temperature prediction process (step S306). Note that the start of body temperature prediction (S305) is skipped if body temperature prediction is already being executed. Similarly, the timer T2 start (S306) is skipped if the timer T2 has already been started. Then, the arithmetic processing unit 223 turns off the wide range mark 114 if it is lit or blinking on the display unit 230, and starts displaying the predicted value by the body temperature prediction process started in step S306 (step S307, S308). Note that the prediction mark 112 is lit while the predicted value is displayed. The wide range mark 114 is displayed with characters and / or characters indicating that “processing is below 30 ° C.”.

When it is determined by the body temperature prediction process that the body temperature of the subject is lower than the normal predicted value range (35 ° C. to 42 ° C. in this embodiment) (step S309), the result of the body temperature prediction is the normal prediction. If it is within the range (step S310), the process returns to step S304 except when a predetermined second (for example, 30 seconds) has elapsed since the body temperature prediction process was started (step S311). In this way, the arithmetic processing unit 223 determines whether or not the prediction by the body temperature prediction process is established until a predetermined second (for example, 30 seconds) elapses after the body temperature prediction process is started (timer T2 ≧ 25 seconds). Note that the prediction establishment judgment is made based on whether or not the predicted value has converged within a certain range. However,
When the predicted value is out of the predicted range (35 ° C. to 42 ° C. in this embodiment)
・ When the hypothermia group is shown in the pattern of the temperature rise curve,
Is not predicted. When it is determined that the prediction is established, the arithmetic processing unit 223 sounds the buzzer 240 (step S312) and maintains the display of the temperature value (predicted value) at that time (step S313).

  Thereafter, when a predetermined elapsed time from the start of prediction, for example, 4 minutes and 30 seconds is exceeded, the display on the display unit 230 is switched to display of actual measurement values (temperature values measured by the temperature measurement unit 210) (steps S314 and S315). This measured value display is a peak hold display that holds the maximum temperature value. Furthermore, after that, when the elapsed time from the start of prediction exceeds 10 minutes, the arithmetic processing unit 223 sounds the buzzer 240 to notify that the 10-minute temperature measurement is established (steps S316 and S317).

  As described above, when the body temperature of a subject having a body temperature in the normal prediction range is measured by the electronic thermometer 100 of the present embodiment, the same processing as that of a general electronic thermometer proceeds, and the body temperature measurement is completed. Become. On the other hand, the electronic thermometer 100 of the present embodiment presents the temperature measurement result as accurately as possible even when the body temperature is measured for a subject having a body temperature outside the normal prediction range (35 ° C. to 42 ° C. in the present embodiment). In order to do so, the processing described below is performed.

  If the temperature value measured in step S304 is less than 30 ° C., the process proceeds to “process below 30 ° C.” (step S400). FIG. 4 is a flowchart for explaining the “processing at less than 30 ° C.”. In the “processing at less than 30 ° C.”, when the prediction process is activated, the arithmetic processing unit 223 stops the prediction process to enter a standby state and resets the timer T2 (step S401). Then, the arithmetic processing unit 223 turns on the wide range mark 114 on the display unit 230 and starts the actual measurement value display (steps S402 and S403). In the actual value display here, peak hold (maximum temperature holding function) is not performed. This is because if there is a maximum temperature holding function at less than 30 ° C., there is a risk of misrecognizing the body temperature when measuring low body temperature. Unlike the self-measurement, the temperature measurement in the emergency area is performed by a medical worker, so it is easy for artifacts to enter, for example, when the medical worker touches the tip of the electronic thermometer 100 before starting the temperature measurement. Temporary temperature rise occurs. Therefore, if the temperature is lower than 30 ° C., peak hold is not performed, and the risk of mistaking the body temperature at the time of hypothermia measurement is reduced.

Next, the arithmetic processing unit 223 determines whether to end the body temperature measurement when the actually measured value is less than 30 ° C. (Step S404). In the end determination, for example, it is determined that the process is ended when one of the following (1) and (2) is established.
(1) The elapsed time from the start of temperature display is 2 minutes 30 seconds or more (timer T1 ≧ 2 minutes 30 seconds).
(2) The actual measurement value exceeds a predetermined value (4 ° C. in the example of the present embodiment) from the start of the temperature measurement, and the temperature increase amount indicated by the current actual measurement value is less than a predetermined threshold Th1 ( For example, less than 0.02 (° C./4 seconds).

  If it is not determined that the process is terminated, the process returns to step S304. On the other hand, when it is determined that the process is ended by the end determination, the arithmetic processing unit 223 rings the buzzer 240, fixes the display value of the display unit 230, and ends the process (steps S405, S406, and S407).

  Returning to FIG. 3, when it is determined by the body temperature prediction process that the body is a hypothermia group (YES in step S309), or when 30 seconds have elapsed since the start of prediction but the prediction has not been established (NO in step S310 and step). The calculation processing unit 223 executes “low body temperature / high body temperature processing” (YES in S311) (step S500). Hereinafter, the “low body temperature / high body temperature process” will be described with reference to the flowchart of FIG.

  In the “low body temperature / high body temperature process”, the arithmetic processing unit 223 stops the body temperature prediction process if it is in operation (step S501). Then, the arithmetic processing unit 223 starts actual measurement value display on the display unit 230 (S502). In the actual value display here, peak hold is performed. Further, the arithmetic processing unit 223 turns on the wide range mark 114 when the actual measurement value exceeds 43 ° C. (steps S503 and S504).

Subsequently, the arithmetic processing unit 223 makes an end determination based on the value of the timer T1 and the actually measured value (step S505). In this end determination, for example, the end is determined when any of the following (1) to (3) is established.
(1) The elapsed time from the start of temperature display is 2 minutes 30 seconds or more (timer T1 ≧ 2 minutes 30 seconds).
(2) The temperature increase amount indicated by the current actual measurement value is less than a predetermined threshold Th2 (for example, less than 0.02 ° C./4 seconds).
(3) The current actual measurement value is lower than the peak value by a predetermined temperature (0.4 ° C. in this example) or more.
In the conditions (2) and (3), the predetermined threshold and the predetermined temperature may be changed depending on whether the body temperature is low (less than 35 ° C.) or high body temperature (42 ° C. or higher).

  If it is determined by the end determination that the body temperature measurement has ended, the arithmetic processing unit 223 rings the buzzer 240, fixes the display on the display unit 230, and ends the present process (steps S506, S507, and S508). On the other hand, if it is determined by the end determination that the body temperature measurement has not ended, the process returns to step S503. As a result, steps S507 and S508 are executed after waiting for the end determination to determine the end of the body temperature measurement.

  FIG. 6 shows the relationship between the display contents by the processing described above and the measured temperature value. In this embodiment, the display start temperature is 20 ° C., the predicted execution temperature range in which the body temperature prediction can be performed is 30 ° C. to 42 ° C., and the temperature range established as the predicted value is 35 ° C. to 42 ° C. In addition, the setting of these temperature values is an example, and is not limited to this. In the display unit 230, the display control unit 227 functions as a first display control unit that displays the predicted value on the display unit 230, and the prediction mark 112 is displayed on the display unit 230 while the predicted value is being predicted or established. Turn on or blink. When the measured value is outside the predicted range and within the predicted execution temperature range, the measured value is displayed by peak hold. When the actual measurement value is lower than the predicted execution temperature range, the display control unit 227 functions as a second display control unit that displays the actual measurement value on the display unit 230. The mark 114 is turned on or blinked on the display unit 230. Further, when the temperature is higher than the predicted execution temperature range, the wide range mark 114 is turned on or blinked together with the execution value display by the peak hold.

  When applied to the above-described processing, temperature display is started when the actually measured value is 20 ° C. or higher (S302), and when the measured value is 30 ° C. or higher, prediction value display is started together with the start of the prediction processing (S304). When the actual measurement value is in the range of 20 ° C. to 30 ° C., the display control unit 227 functions as a second display control unit that displays the actual measurement value on the display unit 230, and the wide range mark 114 lights up or flashes and peaks. The measured value display without hold is performed (S403). Further, when the predicted value is fixed in the range of 30 ° C. to 35 ° C. (hypothermia), the prediction is not established, and the display control unit 227 functions as a second display control unit that displays the actual measurement value on the display unit 230. Then, the display is switched to the actual value display with the peak hold (S309, S311, S501). In this range, the wide range mark 114 does not light up or blink. Further, even in the case of a hyperthermia in which the predicted value or the actual measurement value exceeds 42 ° C., the body temperature prediction is not established, and the display control unit 227 functions as a second display control unit that displays the actual measurement value on the display unit 230. The actual value display with the peak hold is switched (S309, S311, S501). Here, when the measured value exceeds 43 ° C., the wide range mark 114 is lit or blinked (S504).

  Hereinafter, specific cases shown in FIGS. 7 to 12 will be described. These graphs schematically show the outline and do not consider the linearity of the scale. The sampling time is also different from the actual time. 7 to 12, a display section described as “W” is a section in which the wide range mark 114 is lit or blinked.

  FIG. 7A shows an example in which the body temperature of the subject is within the predicted value range (35 ° C. to 42 ° C. in the present embodiment). The electronic thermometer 100 is attached to the measurement site, and temperature measurement by the temperature measurement unit 210 is started. When the measured value is between 20 ° C. and 29.9 ° C., the display control unit 227 functions as a second display control unit that displays the measured value on the display unit 230 under the control of the arithmetic processing unit 223. The measured value display without the maximum temperature holding function (no peak hold) is performed, and the wide range mark 114 is lit or blinked. (S403). Thereafter, when the actual measurement value is 30 ° C. or higher, the arithmetic processing unit 223 starts the body temperature prediction process, displays the predicted value on the display unit 230, and turns off the wide range mark 114. When 30 seconds have elapsed from the start of prediction, the arithmetic processing unit 223 determines that the prediction has been established, and the display control unit 227 functions as a first display control unit that displays the predicted value on the display unit 230. The prediction result is displayed on the screen and the buzzer 240 is sounded (S312 and S313). Furthermore, when 4 minutes and 30 seconds elapse from the start of prediction, the display control unit 227 functions as a second display control unit that displays the actual measurement value on the display unit 230 under the control of the arithmetic processing unit 223, and displays the display on the display unit 230. The display is switched to the actual measurement value, and when 10 minutes elapses from the start of the prediction, the buzzer 240 is sounded to notify the establishment of the 10-minute temperature detection (S314 to S317). Thus, since the body temperature of the subject is in the predicted value range (35 ° C. to 42 ° C.), the specifications are almost the same as those of the existing predictive thermometer, so that confusion of the user can be avoided.

  FIG. 7B shows a case where the actual measurement value exceeds 30 ° C. and the body temperature prediction process is once started, but the actual measurement value falls below 30 ° C. Unlike the self-measurement, temperature measurement in the emergency area is performed by a medical worker, and thus artifacts are likely to occur. For example, when a medical worker touches the tip of the electronic thermometer 100 before the start of temperature measurement, a temporary temperature rise occurs. If this exceeds 30 ° C. and the measured value falls below 30 ° C. again at room temperature, if it is necessary to turn off and on the power, there is a possibility of hindering on-site treatment. Therefore, in the present embodiment, when a transition from a state where the actually measured value is 30 ° C. or higher (period 701) to a state below 30 ° C. (period 702) occurs within 30 seconds from the start of prediction, body temperature prediction processing is performed. The body temperature prediction process is automatically restarted after initialization (NO in S311, NO in S304, S401). Therefore, when the actual measurement value becomes 30 ° C. or higher again, the arithmetic processing unit 223 returns the timer T2 to 0 and restarts, and restarts the prediction process from the initial state. In the period 702, a wide range mark is displayed (S504).

  FIGS. 8A and 8B show an operation example when the body temperature of the subject is a low body temperature of 30 ° C. to 35 ° C. FIG. As described above, the body temperature prediction process is executed when the actual measurement value is 30 ° C. or higher. However, if it is determined that the prediction is not established in step S310, the display control unit 227 controls the arithmetic processing unit 223 to display the actual measurement value. It functions as a second display control means for displaying on the display unit 230 and becomes an actual measurement value display maintaining the maximum temperature (step S502, period 801). In the period 801, the end determination described in step S505 is performed in order to determine the hypothermia as quickly as possible. In particular, at the time point 802 in FIG. 8B, the current actual measurement value is lowered by 0.4 ° C. or more from the peak-held actual measurement value, and it is determined that the process is finished by the end determination in step S505. If it is determined that the processing is to be ended, the arithmetic processing unit 223 rings the buzzer 240, fixes the temperature display, and ends the processing (steps S507 and S508).

  (A) and (B) of FIG. 9 show an operation example when the body temperature of the subject is less than 30 ° C. In this case, the measured value does not reach 30 ° C., and it is determined that the process is finished in step S404. In FIG. 9A, it is detected that there is a temperature increase of 4 ° C. or more from the actual measurement value at the start of measurement (time point 901), and the temperature increase amount is less than a predetermined value (Th1) (time point 902). This shows how the measurement is finished (steps S404 to S407). By determining the end of measurement based on the temperature rise amount, the hypothermia measurement result can be presented quickly.

  In FIG. 9B, in the case where the actual measurement value increases slowly, the temperature increase amount is less than the predetermined value (Th1) although the temperature increase of 4 ° C. or more has occurred from the actual measurement value at the start of measurement. In addition, a state (time point 903) in which it is determined that the measurement is finished when a predetermined time (2 minutes and 30 seconds in the present embodiment) has passed since the temperature display started is shown. There are cases where body temperature rises slowly, such as when rewarming is being performed, and the idea of measuring equilibrium temperature under such circumstances is rather inappropriate. In the present embodiment, the measurement is terminated due to a time limit from the viewpoint that it is more useful to obtain a shorter temperature measurement result even during the change as a measurement of the effect before and after the treatment.

  FIG. 10A shows a case where the body temperature of the subject is less than 30 ° C., and the measured value once exceeded 30 ° C. due to an artifact as described in FIG. In this case, the actual measurement value is less than 30 ° C. In this case, the display control unit 227 functions as a second display control unit that displays the actual measurement value on the display unit 230 under the control of the arithmetic processing unit 223, and displays the actual measurement value without peak hold and the lighting or blinking of the wide range mark 114. The determination of body temperature measurement is determined by the end determination in step S404.

  FIG. 10B shows a case where the subject's body temperature is a low body temperature of 30 ° C. to 34 ° C., and the hypothermia group is determined 20 seconds after the start of the body temperature prediction process. In this case, the process of step S500 is started without waiting for the determination of prediction establishment 30 seconds after the start of the body temperature prediction process (YES in step S309). The subsequent end determination is as described in step S505.

  Next, the case where the subject's body temperature is a hyperthermia exceeding 42 ° C. will be described with reference to FIGS. 11 and 12. (A) of FIG. 11 is an operation example when the body temperature of the subject exceeds 43 ° C. In the period 1101, when the predicted value of the body temperature prediction process exceeds 42 ° C., the arithmetic processing unit 223 fixes the display on the display unit 230 at 42 ° C. Then, when 30 seconds have elapsed from the start of the body temperature prediction process and it is determined that the prediction is not established, actual value display by peak hold is started (step S502). When the measured value exceeds 43 ° C. as at time 1102, the wide range mark 114 is turned on or blinks (steps S503 and S504). And body temperature measurement is complete | finished by the completion | finish judgment of step S505. In (A) of FIG. 11, it is determined that the body temperature measurement is finished when the elapsed time from the start of the temperature display exceeds 2 minutes 30 seconds. In this way, even when the temperature rises slowly, the measured value is fixed in a certain time (2 minutes 30 seconds) and the display is fixed. In the case where the temperature adjustment function is broken due to heat stroke or the like, such a time limit is provided from the viewpoint that it is more useful to measure the measurement results over a certain period of time over the equilibrium temperature.

  Note that the peak hold is performed in the actual value display at the high temperature for the following reasons, for example. That is, if the peak hold is not performed, there is a risk that the body temperature of the hyperthermia patient will be mistakenly low when the electronic thermometer 100 is placed under the armpit or the position of the electronic thermometer 100 is shifted. .

  FIG. 11B is the same as FIG. 11A, but shows a state in which the body temperature measurement is determined to have ended because the temperature increase amount is less than a predetermined value at the time point 1103. . In FIG. 11B, the actual measurement value does not exceed 43 ° C., and the wide range mark 114 is not displayed. In this way, by adding the stability of the actual measurement value to the end determination, in the case where the body temperature change stabilizes at an early stage, the temperature measurement value can be provided to the emergency site more quickly. FIG. 12 is the same as FIG. 11B, but it is determined that the body temperature measurement has been completed because the actual measurement value has decreased by 0.4 ° C. or more from the peak-held value at time 1201. Is shown.

As described above, according to the present embodiment, it is possible to measure the body temperature of a subject in a state of hypothermia or hyperthermia outside the predicted value range while maintaining the function as a normal predictive thermometer. Electronic thermometer is provided.
In addition, it is good also as an electronic thermometer which did not provide a prediction function but set the display start temperature of an actual measurement value to 20 degreeC as an actual measurement type electronic thermometer.

Claims (14)

An electronic thermometer having a predicting means for predicting an equilibrium temperature based on a change with time of an actual measurement value of a temperature at a measurement site detected by a temperature measuring element,
A first display control unit configured to execute a prediction process by the prediction unit and display the predicted value on a display unit when the actual measurement value is in a predicted execution temperature range that is a temperature range in which body temperature prediction can be performed;
Determining means for determining whether or not the prediction in the prediction process is established;
An electronic thermometer comprising: second display control means for displaying the actual measurement value on the display unit when the judgment means judges that the prediction in the prediction processing has not been established.   After the actual measurement value becomes the value of the predicted execution temperature range, the actual measurement value becomes a value outside the prediction execution temperature range before the determination by the determination unit, and the actual measurement value becomes the predicted execution temperature again. 2. The electronic thermometer according to claim 1, wherein the prediction process by the prediction unit is restarted from an initial state when a value in the range is reached.   3. The electronic thermometer according to claim 2, wherein the second display control means displays the measured value by peak holding. 4.   The second display control means further measures body temperature when the temperature rise amount per predetermined time of the actual measurement value is equal to or less than a threshold value, or when the actual measurement value is lower than the peak hold value by a predetermined value or more. The electronic thermometer according to claim 3, wherein the display content of the actual measurement value is fixed by determining that the operation is finished. When the measured value is equal to or higher than the display start temperature lower than the predicted execution temperature range, the display on the display unit is started, and the elapsed time from the display start is timed,
The said 2nd display control means judges that body temperature measurement is complete | finished when the said elapsed time exceeded predetermined time, and fixes the display content of an actual measurement value, Any one of Claim 1 thru | or 4 characterized by the above-mentioned. Electronic thermometer as described in 1. An electronic thermometer having a predicting means for predicting an equilibrium temperature based on a change with time of an actual measurement value of a temperature at a measurement site detected by a temperature measuring element,
A first display control unit configured to execute a prediction process by the prediction unit and display the predicted value on a display unit when the actual measurement value is in a predicted execution temperature range that is a temperature range in which body temperature prediction can be performed;
An electronic thermometer comprising: third display control means for displaying the measured value on the display unit when the measured value is outside the predicted execution temperature range.   The electronic thermometer according to claim 6, wherein the third display control means performs a display for notifying that the actual measurement value is outside the predicted execution temperature range.   The third display control means displays the measured value without performing peak hold when the measured value is lower than the predicted execution temperature range, and when the measured value is higher than the predicted execution temperature range. The electronic thermometer according to claim 6 or 7, wherein a peak hold is performed and an actual measurement value is displayed. When the measured value is equal to or higher than the display start temperature lower than the predicted execution temperature range, the display on the display unit is started, and the elapsed time from the display start is timed,
When the measured value is lower than the predicted execution temperature range, the third display control unit is configured to determine whether the current measured value is greater than the measured value at the start of temperature measurement, when the elapsed time exceeds a predetermined time. It is determined that the body temperature measurement is ended when the temperature rise per predetermined time of the current actual measurement value is equal to or less than a threshold value, and the display content of the actual measurement value is fixed. Item 9. The electronic thermometer according to any one of Items 6 to 8. When the measured value is equal to or higher than the display start temperature lower than the predicted execution temperature range, the display on the display unit is started, and the elapsed time from the display start is timed,
In the case where the measured value is higher than the predicted execution temperature range, the third display control means
・ If the elapsed time exceeds the specified time,
・ If the amount of temperature rise per predetermined time of the current measured value is below the threshold,
・ If the actual measurement value is lower than the peak hold value by a predetermined value or more,
The electronic thermometer according to any one of claims 6 to 9, wherein the body temperature measurement is determined to be terminated by any of the above, and the display content of the actual measurement value is fixed. An electronic thermometer having a predicting means for predicting an equilibrium temperature based on a change with time of an actual measurement value of a temperature at a measurement site detected by a temperature measuring element,
An electronic thermometer, wherein the display start temperature of the actual measurement value is 20 ° C. An electronic thermometer that displays an actual measurement value of a temperature at a measurement site detected by a thermometer,
An electronic thermometer, wherein the display start temperature of the actual measurement value is 20 ° C. A method for controlling an electronic thermometer that performs a prediction process for predicting an equilibrium temperature based on a change over time of an actual measurement value of a temperature at a measurement site detected by a thermometer,
A first display control step of executing the prediction process and displaying the predicted value on a display unit when the actual measurement value is in a predicted execution temperature range that is a temperature range in which body temperature prediction can be performed;
A determination step of determining whether or not the prediction in the prediction process is established;
A control method for an electronic thermometer, comprising: a second display control step of displaying the actual measurement value on the display unit when it is determined in the determination step that the prediction in the prediction process has not been established. A method for controlling an electronic thermometer that performs a prediction process for predicting an equilibrium temperature based on a change over time of an actual measurement value of a temperature at a measurement site detected by a thermometer,
A first display control step of executing the prediction process and displaying the predicted value on a display unit when the actual measurement value is in a predicted execution temperature range that is a temperature range in which body temperature prediction can be performed;
A control method for an electronic thermometer, comprising: a third display control step of displaying the actual measurement value on the display unit when the actual measurement value is outside the predicted execution temperature range.

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