JP2009240428A - Intravenous drip measuring system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive intravenous drip measuring system, which is miniaturized and allows a nurse or the like to easily and accurately perform measuring work. <P>SOLUTION: The intravenous drip measuring system comprises a sensor slave unit 3 attachable to the intravenous drip fall part 2 of a free fall type intravenous drip set 1 and a mobile master unit 4 capable of wireless communication with the sensor slave unit 3. The sensor slave unit 3 is provided with a sensor part 5 for detecting or measuring the dripping or the number of drops of infusion freely falling at the intravenous drip fall part 2 within the prescribed measurement time, and an RFID tag part for wirelessly transmitting slave unit identification information stored beforehand the dripping or the number of drops which is detected or measured as dripping signals. The mobile master unit 4 is provided with an RFID reader part for communicating with the RFID tag part by electromagnetic induction or electromagnetic coupling and receiving the dripping signals, an operation control part for calculating an intravenous drip speed on the basis of the received dripping signals, and a display part 18 for displaying the calculated intravenous drip speed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an infusion measurement system capable of measuring an infusion rate of an infusion solution in a natural drop type infusion set.

  When performing infusion using a natural drop-type infusion set in hospitals, etc., the nurse visually observes the drop of the infusion in the infusion tube (infusion part) while watching the watch, and measures the number of drops. The number of drops is adjusted by calculating the speed. In this case, it takes time to measure the number of drops, and it depends on visual observation. In particular, at night, measurement is performed while illuminating the drip tube with a flashlight or the like in the dark, which is very laborious and accurate measurement is difficult.

  For this reason, for example, Patent Document 1 proposes an infusion rate adjustment confirmation assisting device having a computing means for computing the infusion drip time, a display means for displaying the computation result, and a flashing light emitting means. In this apparatus, a nurse or the like inputs the number of drops per unit drop amount, etc., and calculates and displays the drip rate, thereby assisting the nurse in visual measurement.

  In addition, various automatic drip rate adjusting devices and automatic drip measuring devices equipped with a sensor unit for automatically measuring the number of infusions have been proposed and already commercialized. For example, in Patent Document 2, a sensor that measures the number of drops of infusion that falls in an infusion tube (an instillation unit), a display unit that displays a measurement value, a CPU that performs these arithmetic processes, and power to these are provided. A drip liquid measuring device has been proposed that includes a battery to be supplied and a housing in which all of these are built.

Japanese Patent No. 3156023 Japanese Patent No. 3134916

The following problems remain in the conventional technology.
That is, in the technique of the conventional patent document 1, the measurement by the nurse can be assisted, but since the measurement itself is performed by visually observing the dropping, the measurement depends on an operator such as a nurse and the measurement is high. It is difficult to keep accuracy accurate. In addition, in a conventional automatic drip measuring device such as the technique of Patent Document 2, a sensor unit that measures the number of infusions, a calculation unit that calculates the infusion rate from the number of infusions, A plurality of members and mechanisms, such as a display unit for displaying, a drive unit for supplying power to them, a control unit for controlling these, and a switch unit for performing each operation, are provided, and the apparatus becomes expensive. In addition, there is a disadvantage that it is difficult to miniaturize and a support base is required for mounting. In addition, in the case of an infusion measurement device including an automatic measurement sensor, a measurement result display unit, and a measurement switch, when a nurse or the like presses the measurement switch of the device attached to the infusion tube, the sensor is likely to be misaligned. There is an inconvenience that accuracy is lowered due to an error in measurement.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide an infusion measurement system that can be reduced in cost and reduced in size, and that allows a nurse or the like to perform measurement work easily and accurately. And

  The present invention employs the following configuration in order to solve the above problems. That is, the drip measurement system of the present invention comprises a sensor slave unit that can be attached to a drip drop part of a natural drop drip set, and a portable master unit that can wirelessly communicate with the sensor slave unit, The sensor slave unit detects or measures the dropping or number of drops of the infusion that naturally falls at the drip dropping unit within a predetermined measurement time, and the dripping detected or measured with the pre-stored slave unit identification information. Or an RFID tag part that wirelessly transmits the number of drops as a drop signal, and the portable master unit communicates with the RFID tag part by electromagnetic induction or electromagnetic coupling to receive the drop signal; And a calculation unit that calculates an infusion rate based on the received dripping signal, and a display unit that displays the calculated infusion rate.

In this drip measurement system, the sensor unit of the sensor slave unit detects or measures the dropping or number of drops of the infusion solution for a predetermined measurement time, and the RFID tag unit by electromagnetic induction or electromagnetic coupling from the RFID reader unit of the portable master unit. Transmits wirelessly the slave unit identification information and the detected or measured number of drops or the number of drops as a drop signal, so that the portable master unit and the sensor slave unit are brought close to a communicable distance together with the slave unit identification information. Drop information such as the number of drops can be obtained in a non-contact manner, and an accurate drip rate can be easily obtained while identifying the sensor slave unit based on this information. Thereby, the drip rate can be adjusted easily and accurately. In particular, since the RFID tag part having the RFID function, which is a non-contact authentication technology using radio waves / electromagnetic waves, is employed, communication is possible only when the portable master unit is brought close to the sensor slave unit to a readable distance. This can avoid interference with other sensor slaves attached to the patient's infusion set, such as adjacent beds.
In addition, the sensor slave unit and the portable base unit are separated, and the sensor slave unit can be simply configured with at least the sensor unit and the RFID tag unit, so it can be attached to the drip drop unit without using a support base. The size and weight can be reduced to a possible size, and the manufacturing cost of the single sensor slave unit can be greatly reduced. In addition, since the portable parent device does not need to include a sensor unit, it can be reduced in size and weight, and high portability can be obtained.
Furthermore, even if sensor slave units are attached to multiple drip sets, each portable sensor unit automatically recognizes each sensor slave unit using slave unit identification information, and receives the drip signal individually to control the drip rate. Obtainable. Therefore, it is possible to manage and measure the optimal speed for a large number of infusion sets at once with a single portable base unit, and each device with all functions such as the calculation unit and display unit can be individually controlled for each infusion set. There is no need to prepare. As a result, the overall cost can be greatly reduced, and the efficiency of measurement and management can be improved.

  In the drip measurement system of the present invention, the portable master unit can transmit a measurement time setting signal capable of arbitrarily setting the measurement time of the dripping or the number of drops to the sensor slave unit, and the sensor The subunit | mobile_unit performs the detection or measurement of the said dripping or the number of dripping in the measurement time based on the received said measurement time setting signal, It is characterized by the above-mentioned. That is, in this drip measurement system, the portable master unit transmits a measurement time setting signal that can arbitrarily set the measurement time of dropping or the number of drops to the sensor slave unit, and the sensor slave unit is based on the measurement time setting signal. Since the drop detection or measurement of the number of drops is performed in the measured time, it is possible to switch the measurement accuracy from the portable base unit side and set the measurement time in consideration of the power consumption and measurement work efficiency of the sensor slave unit It is.

  In the drip measurement system of the present invention, the portable master unit can transmit a measurement start signal that causes the sensor slave unit to start measurement by a switch operation, and the sensor slave unit transmits the measurement start signal. When the drip is received, the dripping or the drip number is detected or measured. That is, in this drip measurement system, the portable master unit transmits a measurement start signal for starting measurement to the sensor slave unit by a switch operation, and when the sensor slave unit receives the measurement start signal, detection of dropping or dropping Therefore, the measurement of the power of the sensor slave unit is not started by simply bringing the portable master unit and the sensor slave unit close to each other, and driving the sensor slave unit only when a switch operation is performed. Consumption can be suppressed as much as possible.

  Moreover, the drip measurement system of the present invention is characterized in that the portable parent device includes a drip blinking unit that blinks at a drip interval obtained based on the received drip signal. That is, in this drip measurement system, the portable base unit has a drip blinking unit that blinks at a drip interval obtained based on the received drip signal, so that the drip blinking unit visually confirms the drip. Can do. In particular, at the time of measurement in the dark at night, the drip rate can be adjusted without directly observing the drip.

  In the drip measurement system of the present invention, the portable master unit can transmit a monitoring start signal for setting the sensor slave unit to a monitoring mode to the sensor slave unit by a switch operation. However, when the monitoring start signal is received, the number of drops is repeatedly measured for a predetermined measurement time, and an alarm is issued when the measured number of drops is equal to or greater than a predetermined upper limit value or less than a predetermined lower limit value. It is provided with a mechanism. That is, in this drip measurement system, since the portable master unit can transmit a monitoring start signal for setting the sensor slave unit to the monitoring mode by a switch operation, the sensor slave unit is contactlessly monitored in the monitoring mode from the portable master unit side. Can be set to In addition, since the sensor slave unit is equipped with an alarm mechanism that issues an alarm when the measured number of drops is greater than or equal to a predetermined upper limit value or less than a predetermined lower limit value, it detects an empty liquid, clogged or excessive flow state. An alert can call attention.

  The drip measurement system of the present invention is characterized in that the portable parent device includes an illumination unit for illuminating the surroundings. That is, in this drip measurement system, since the portable master unit has an illumination unit for illuminating the surroundings, it is possible to confirm by illuminating the drip falling part etc. with the illumination unit even in the dark such as at night. There is no need to carry around.

The present invention has the following effects.
That is, according to the drip measurement system according to the present invention, the sensor slave unit detects or measures the number of drops or drops of infusion in a predetermined measurement time, and the drop or drop detected or measured with the slave unit identification information. Since the portable base unit includes an RFID reader unit that communicates with the RFID tag unit by electromagnetic induction or electromagnetic coupling and receives the dropped signal, Infusion speed can be measured easily and accurately in a non-contact manner, a large number of infusion sets can be managed, and the cost, size, and weight of the apparatus can be reduced. Therefore, if the drip measurement system of the present invention is adopted, it is possible to improve the efficiency and safety of nursing work, prevent medical errors, etc., at low cost with respect to drip.

  Hereinafter, an embodiment of an infusion measurement system according to the present invention will be described with reference to FIGS. 1 to 7.

As shown in FIG. 1, the drip measurement system of the present embodiment is capable of wireless communication between the sensor slave unit 3 that can be attached to the drip dropping unit 2 of the natural drop drip set 1 and the sensor slave unit 3. Portable main unit 4.
The sensor slave unit 3 has a structure that can be attached, for example, with the drip dropping unit 2 interposed therebetween, and as shown in FIGS. A sensor unit 5 that detects or measures the measurement time, an RFID (Radio Frequency Identification) tag unit 6 that wirelessly transmits, as a drop signal, the pre-stored slave unit identification information and the detected or measured drop or number of drops, and a sensor unit A power supply unit for sensor 7 for supplying power to the power supply 5.

  The infusion set 1 includes an infusion container 8 such as a medicinal solution bag or medicinal solution bottle containing an infusion solution (medical solution etc.), and an infusion tube in which one end is connected to the lower end of the infusion container 8 and the other end is connected to a patient's arm or the like. 9 and the drip dropping part 2 which is a drip tube provided in the middle of the infusion tube 9. In addition, the said drip dropping part 2 is made into the transparent cylindrical shape so that the dripping of the infusion which falls naturally may be visually recognized.

  The sensor unit 5 includes, for example, a light emitting unit 5a such as an LED disposed on both sides of the drip dropping unit 2 and a light receiving unit 5b, and the light from the light emitting unit 5a is blocked by dropping. It is an optical sensor for detecting and counting the number of drops. In addition, as the sensor part 5, you may perform light emission and light reception by the light emission part 5a and the light-receiving part 5b using an optical fiber. In addition to the optical sensor type sensor unit 5, other methods such as an ultrasonic method may be adopted as long as the number of drops can be detected and the number of drops can be counted.

  The RFID tag unit 6 is a non-contact authentication unit using radio waves, and includes a slave unit antenna unit 10 and an IC chip 11 which is a non-contact IC tag connected to the slave unit antenna unit 10. ing. The IC chip 11 is connected to the slave unit antenna unit 10 and performs processing related to transmission / reception, etc. connected to the slave unit side transceiver unit 12 and a slave unit side transceiver unit 12 which is a processing circuit capable of wirelessly transmitting and receiving signals. Signal processing control unit 13 to be performed, slave unit identification information that is ID of the sensor slave unit 3 and a slave unit memory unit 14 that can store the number of drops counted, and a slave unit antenna unit that has received the excitation signal And a rectifying power supply unit 15 that converts the current generated in 10 into a direct current and supplies it to each component of the IC chip 11 for driving.

The slave type transceiver unit 12 includes a modulation circuit that modulates a high-frequency signal and a demodulation circuit that performs demodulation.
The signal processing control unit 13 has a control logic and has a function of sending a command to start measurement to the sensor unit 5 based on the high frequency signal demodulated by the demodulator circuit of the slave type transceiver unit 12. The sensor unit 5 has an infusion measurement logic, and is set to start measurement when the infusion measurement logic receives the command.

Further, the signal processing control unit 13 inputs the drop detection signal from the sensor unit 5 via the drip measurement logic, and sets the number of detection signals input within the set measurement time as the drop number via the control logic. It has a function of sending to the slave unit memory unit 14 and storing it. Further, the signal processing control unit 13 modulates the number of drops through the control logic as a drop signal together with the slave unit identification information by the modulation circuit of the slave unit side transmission / reception unit 12 and transmits the modulated signal via the slave unit antenna unit 10. Is set.
The signal processing control unit 13 has a function of controlling the sensor power supply unit 7 to turn on / off the sensor unit 5.

The rectifying power supply unit 15 converts a high-frequency current generated by the electromotive force generated in the slave unit antenna unit 10 that has received a high-frequency signal, which is an excitation signal, into a direct current, rectifies, and supplies power to each component of the IC chip 11 It has a function.
The sensor power supply unit 7 employs a small battery (for example, a button battery) or a battery.
In addition, you may employ | adopt what integrated the subunit | mobile_unit antenna part 10 in the IC chip 11, and was made into one chip.

  The portable base unit 4 includes an RFID reader unit 16 that communicates with the RFID tag unit 6 by electromagnetic induction or electromagnetic coupling to receive a dropping signal, and an arithmetic control unit (calculation) that calculates an infusion rate based on the received dropping signal. 17), a display unit 18 for displaying the calculated infusion rate, a drip blinking unit 19 such as an LED that blinks at a drip interval obtained based on the received drip signal, and the calculated infusion rate and slave unit identification information. A main unit memory unit 20 that records power, a main unit power source unit 21 that supplies power to each component of the portable main unit 4, a switch unit 22 having switches for various operations, and for lighting the surroundings in a dark place The illumination part 23 is provided.

  The RFID reader unit 16 includes a base unit antenna unit 24 and a base unit side transmission / reception unit 25 that is a processing circuit that is connected to the base unit antenna unit 24 and transmits and receives signals via the base unit antenna unit 24. Has been. The RFID reader unit 16 can transmit a high-frequency signal in order to communicate with the sensor slave unit 3. In addition, the communicable distance between the RFID reader unit 16 and the sensor slave unit 3 is appropriately set according to the usage situation such as the arrangement of each drip set 1.

  The base-type transceiver unit 25 includes a modulation circuit that modulates a high-frequency signal to be transmitted as a transmission-side circuit, and a transmission power amplification circuit that amplifies the transmission power of the modulated high-frequency signal. The circuit includes a band-pass filter, a demodulation / detection / amplification circuit that demodulates, detects, and amplifies the received high-frequency signal, and a noise filter.

The arithmetic control unit 17 is a CPU or the like having a control logic that performs various arithmetic processes based on the received dropping signal and controls each component of the portable parent device 4.
That is, the high frequency signal received by the base unit antenna unit 20 is processed in the base unit type transmitting / receiving unit 25 through the band-pass filter, the demodulation / detection / amplification circuit, and the noise filter in this order. The infusion rate is calculated by performing arithmetic processing.

The arithmetic control unit 17 can transmit a measurement time setting signal capable of arbitrarily setting the measurement time of dropping or the number of drops to the sensor slave unit 3 via the RFID reader unit 16. The drop is detected or the number of drops is measured in the measurement time based on the received measurement time setting signal.
The arithmetic control unit 17 can transmit a measurement start signal for starting measurement to the sensor slave unit 3 via the RFID reader unit 16 by a switch operation. The sensor slave unit 3 receives the measurement start signal. It is set to detect dropping and measure the number of drops.

Further, the RFID reader unit 16 can transmit a monitoring start signal for setting the sensor slave unit 3 to the monitor mode to the sensor slave unit 3 by a switch operation.
In addition, when receiving the monitoring start signal, the sensor slave unit 3 repeatedly measures the number of drops at a predetermined measurement time and alerts when the measured number of drops is equal to or higher than a predetermined upper limit value or lower than a predetermined lower limit value. Is provided with an alarm mechanism 26 having infusion monitoring logic.

The display unit 18 is a liquid crystal display capable of displaying various types of information, for example, and displays various types of information such as the drip rate and slave unit identification information.
The display unit 18 includes an illumination mechanism 27 that illuminates the display. For example, the illumination mechanism 27 is a backlight unit using an LED light source that illuminates a liquid crystal display.

The base unit power supply unit 21 employs a dry cell, a battery, or the like.
The switch unit 22 includes a measurement start button 22a for transmitting a measurement start signal, a monitoring start button 22b for transmitting a monitoring start signal, a measurement time switching switch 22c for switching the measurement time, an infusion type switching switch 22d for switching the infusion type, and drip monitoring. The operation keyboard unit includes various switches such as a monitoring data acquisition button 22e for reading data from the sensor slave unit 3. Note that the measurement time selector switch 22c can be switched in three types, for example, 5 seconds, 10 seconds, and 20 seconds. The drip type changeover switch 22d can be switched between two types, for example, 20 drops / ml and 60 drops / ml.

The illumination unit 23 is an LED illumination device using, for example, a white LED with low power consumption, and is installed on the front end surface of the portable parent device 4, for example. The illumination unit 23 emits light when a lighting button (not shown) is pressed.
The alarm mechanism 26 is a buzzer or the like that is controlled by the drip monitoring logic and emits an alarm sound, and its volume is set so that it can be heard by the patient who is performing the drip and its surroundings. Further, the alarm mechanism 26 is provided with a switch (not shown) that can manually turn on / off the alarm function so that the alarm can be turned off at the time of movement or the like.

  Next, a method for measuring the drip speed by the drip measurement system of the present embodiment will be described with reference to FIGS.

First, as shown in the flowchart of FIG. 5, a nurse or the like who has the portable parent device 4 brings the portable parent device 4 closer to the sensor child device 3 attached to the drip dropping unit 2 during a patrol or the like (steps). S01). At this time, the portable master device 4 and the sensor slave device 3 are brought close to each other within a distance of 20 cm, for example, as a wireless communication distance. Next, the drip type changeover switch 22d of the portable parent device 4 is operated to select and set a predetermined drip type (step S02).
Further, the measurement time changeover switch 22c is operated to select and set a predetermined measurement time (step S03).

  When the measurement start button 22a of the portable parent device 4 is pressed in the proximity state (step S04), a measurement start signal is transmitted from the RFID reader unit 16 of the portable parent device 4 via the parent device antenna unit 24. At this time, the measurement start signal includes information on the selected measurement time and infusion type. The sensor slave unit 3 that has received the measurement start signal by the slave unit antenna unit 10 and the RFID tag unit 6 starts measurement (step S05). That is, the number of drops is counted by the sensor unit 5 within the set measurement time.

  After the measurement within the measurement time is finished (step S06), the number of dropped drops and the slave unit identification information are stored in the slave unit memory unit 14, and the information is carried by the slave unit antenna unit 10 and the RFID tag unit 6. It transmits to the type | mold parent machine 4 (step S07). In addition, transmission / reception of these information is performed by the electromotive force at the time of receiving the high frequency signal from the portable main | base station 4. FIG. Further, the measurement itself by the sensor unit 5 is performed by supplying power from the sensor power source unit 7.

The portable parent device 4 that has received the number of drops and the slave unit identification information by the RFID reader unit 16 calculates the drip rate from the number of drops by the calculation control unit 17 (step S08), and displays this drip rate on the display unit 18. Is displayed on the display surface in units such as “drops / minute” or “flow rate / h” (step S09). At this time, since the display on the display unit 18 is illuminated by the illumination mechanism 27, the display can be confirmed even in the dark.
It is possible to repeatedly perform from the setting of the measurement time (step S03) to the display of the infusion rate (step S09).

  Further, when the monitoring mode is set, a monitoring start signal is transmitted by pressing the monitoring start button 22b of the portable parent device 4 (step S10). The sensor slave unit 3 that has received this monitoring start signal is set to the monitoring mode and starts the monitoring mode in which the number of infusions is counted at regular intervals (step S11). In this monitoring mode, the sensor slave unit 3 performs measurement at a preset time interval. For example, in order to reduce power consumption, 15 seconds (measurement time is 1 time every 1 to 2 minutes). Since the drip set may be moved, the number of drops is measured by about 15 seconds.

  In this monitoring mode, the data on the number of drops repeatedly measured at the above time interval is sequentially recorded and updated in the slave unit memory unit 14 so that a plurality of data on the number of drops within a predetermined time is accumulated as the drop monitoring data. It has become.

  Further, in this monitoring mode, as shown in FIG. 6, when the measurement data deviates from the normal value, that is, when the number of drops within the set measurement time is equal to or more than a predetermined upper limit value, overflow and infusion are performed. It is judged by the monitoring logic, and if it is below the predetermined lower limit value, it is judged by the drip monitoring logic that an empty liquid or clogging has occurred (step S13), and an alarm is sounded by the alarm mechanism 26 (step S14). In these cases, the alarm mechanism 26 may be provided with a function for transmitting an alarm signal to the portable base unit 4 and informing the portable base unit 4 that has received the alarm signal. Absent. Further, as the alarm mechanism 26, an abnormality indicator lamp may be provided, and not only the alarm but also the abnormality indicator lamp may be turned on.

  In addition, a nurse or the like who has the portable parent device 4 brings the portable parent device 4 close to the sensor slave device 3 attached to the drip dropping unit 2 during a patrol or the like (step S15). When the monitoring data acquisition button 22e is pressed, the portable master unit 4 transmits a monitoring data read signal for transmitting the drop monitoring data to the sensor slave unit 3 (step S16). The recorded drop monitoring data and slave unit identification information are transmitted to the portable master unit 4 and are read by the portable master unit 4 (step S17).

  Furthermore, the portable base unit 4 that has received the drop monitoring data and the slave unit identification information displays on the display unit 18 the drip velocity record at the time of monitoring and the slave unit identification information calculated based on the drop monitor data. It has been set (step S18). Thereby, it is possible to display and confirm the drip dropping flow rate status from the past to the latest for a certain time. The dripping monitoring data and the slave unit identification information are also stored in the master unit memory unit 20 as monitoring records.

Next, another measurement method will be described with reference to the flowchart of FIG.
In this measurement method, the sensor slave unit 3 is set in advance to transmit the detection signal as a drop signal when the drop is detected, not the number of drops within the measurement time. In other words, this measurement method is the same as the measurement method described above until measurement is started by the sensor slave unit 3 (step S05), but the sensor slave unit 3 transmits a drop signal together with the slave unit identification information for each drop. (Step S21).

  In the portable base unit 4 that has received the dropping signal, the calculation control unit 17 controls the dropping blinking unit 19 to blink according to the reception of the dropping signal (step S22). Moreover, the calculation control part 17 calculates and calculates an infusion rate based on the receiving interval of a dripping signal (step S23). Further, the display unit 18 displays the slave unit identification information and the drip rate (step S24). At this time, the drip velocity is updated and displayed as needed in response to the reception of the drip signal. Thereafter, when the set measurement time elapses, the measurement by the sensor slave unit 3 is terminated, the update of the infusion rate in the portable base unit 4 is stopped, and the infusion rate based on the number of drops within the measurement time is displayed on the display unit 18. Is displayed (step S25).

  As described above, in the drip measurement system of the present embodiment, the sensor unit 5 of the sensor slave unit 3 detects or measures the infusion or number of infusions in a predetermined measurement time, and from the RFID reader unit 16 of the portable master unit 4. Since the RFID tag unit 6 wirelessly transmits as a drop signal the slave unit identification information and the detected or measured number of drops or the number of drops by electromagnetic induction or electromagnetic coupling, the portable master unit 4 and the sensor slave unit 3 can communicate with each other. In a state of being close to the distance, drop information such as the number of drops can be obtained in a non-contact manner together with the handset identification information, and an accurate drip rate can be easily obtained while identifying the sensor handset 3 based on this. Thereby, the drip rate can be adjusted easily and accurately. In particular, since the RFID tag unit 6 having the RFID function, which is a non-contact authentication technology using radio waves and electromagnetic waves, is employed, when the portable parent device 4 is brought close to the sensor slave device 3 to a readable distance. Only the communication is performed, and interference with other sensor slave units 3 attached to the drip set 1 of the patient such as an adjacent bed can be avoided.

  Moreover, since it is the structure isolate | separated into the sensor subunit | mobile_unit 3 and the portable main | base station 4, since the sensor subunit | mobile_unit 3 can be simply comprised only by the sensor part 5 and the RFID tag part 6, without using a support stand etc. The size can be reduced to a size that can be attached to the drip dropping unit 2, and the manufacturing cost of the sensor slave unit 3 can be significantly reduced. Further, since the portable parent device 4 does not need to include the sensor unit 5, it can be reduced in size and weight, and high portability can be obtained.

  Furthermore, even if the sensor slave unit 3 is attached to each of the plurality of drip sets 1, each sensor slave unit 3 is automatically recognized by the single unit portable base unit 4 using the slave unit identification information acquired by the RFID technology, and individually An infusion rate can be obtained by receiving a drip signal. Therefore, it becomes possible to manage and measure the appropriate point speed in a large number of infusion sets 1 with a single portable master unit 4 and to provide all functions such as a calculation unit and a display unit for each infusion set 1. There is no need to prepare a separate device. As a result, the overall cost can be greatly reduced, and the efficiency of measurement and management can be improved.

  In addition, the portable master device 4 transmits a measurement time setting signal that can arbitrarily set the measurement time of the dropping or the number of drops to the sensor slave device 3, and the sensor slave device 3 measures the measurement time based on the measurement time setting signal. Since the drop detection or the number of drops is measured, the measurement accuracy can be switched from the portable master unit 4 side, and the measurement time can be set in consideration of the power consumption of the sensor slave unit 3 and the measurement work efficiency. is there.

Furthermore, since the portable master unit 4 transmits a measurement start signal for starting measurement to the sensor slave unit 3, and the sensor slave unit 3 receives the measurement start signal, the drop detection or the number of drops is measured. The measurement is not started by simply bringing the portable master unit 4 and the sensor slave unit 3 close to each other, and the sensor slave unit 3 is driven only when a switch operation is performed, thereby reducing the power consumption of the sensor slave unit 3. It can be suppressed as much as possible.
Moreover, since the portable main | base station 4 is provided with the dripping blink part 19 which blinks at the dripping interval obtained based on the received dripping signal, dripping can be visually confirmed by the dripping blinking part 19. In particular, at the time of measurement in the dark at night, the drip rate can be adjusted without directly observing the drip.

In addition, since the portable master device 4 can transmit a monitoring start signal for setting the sensor slave device 3 to the monitoring mode, the sensor slave device 3 can be set to the monitoring mode in a non-contact manner from the portable master device 4 side. it can. In addition, the sensor slave unit 3 is provided with an alarm mechanism 26 that issues an alarm when the measured number of drops is greater than or equal to a predetermined upper limit value or less than a predetermined lower limit value, so that an air liquid, clogging, or excessive flow state is detected. Attention can be alerted by an alarm.
In addition, since the portable base unit 4 includes the illumination unit 23 for illuminating the surroundings, the drip dropping unit 2 can be illuminated and confirmed by the illumination unit 23 even in the dark such as at night, and a flashlight or the like can be used. There is no need to carry around.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, you may set to the portable main | base station 4 so that an infusion end time can be input for every sensor subunit | mobile_unit 3. FIG.

Further, although the drip rate (dropping flow rate) is calculated and displayed from the drip signal received in the portable master device 4, the total drip amount or the remaining drip amount may be calculated and displayed based on this drip rate. Absent.
Further, from the base unit memory unit 20 in which the drip speed and the base unit identification information of each sensor slave unit 3 are recorded, the information can be transmitted to a personal computer or the like by wire or wirelessly, and the data can be managed by the personal computer or the like. It doesn't matter.
Further, in the sensor slave unit, even if there is no sensor power supply unit, the drip measurement may be performed by directly driving the sensor unit by supplying power from RFID electromagnetic induction.

In one Embodiment of the drip measurement system which concerns on this invention, it is a front view which shows the sensor subunit | mobile_unit and portable main | base station with which the drip set was mounted | worn. In this embodiment, it is a front view which shows the sensor subunit | mobile_unit with which the drip set was mounted | worn. In this embodiment, it is a block diagram which shows the structure of a sensor subunit | mobile_unit. In this embodiment, it is a block diagram which shows the structure of a portable main | base station. In this embodiment, it is a flowchart which shows the measuring method by a drip measuring system. In this embodiment, it is a flowchart which shows the monitoring mode by an infusion measurement system. In this embodiment, it is a flowchart which shows the other example of the measuring method by a drip measuring system.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Infusion set, 2 ... Drip dropping part, 3 ... Sensor subunit | mobile_unit, 4 ... Portable main | base station, 5 ... Sensor part, 6 ... RFID tag part, 16 ... RFID reader part, 17 ... Calculation control part (calculation part) , 18 ... display unit, 19 ... drip flashing unit, 23 ... illumination unit, 26 ... alarm mechanism

Claims (6)

It is composed of a sensor slave unit that can be attached to the drip drop part of the natural drop drip set, and a portable master unit that can wirelessly communicate with the sensor slave unit,
A sensor unit that detects or measures the dropping or number of drops of the infusion solution that spontaneously drops in the drip dropping unit within a predetermined measurement time;
An RFID tag unit that wirelessly transmits the pre-stored slave unit identification information and the detected or measured number of drops or number of drops as a drop signal;
An RFID reader unit that receives the drop signal by communicating with the RFID tag unit by electromagnetic induction or electromagnetic coupling;
A calculation unit that calculates an infusion rate based on the received dropping signal;
A drip measurement system comprising: a display unit configured to display the calculated drip velocity. The infusion measurement system according to claim 1,
The portable master unit can transmit a measurement time setting signal that can arbitrarily set the measurement time of the dripping or the number of drops to the sensor slave unit,
The drip measurement system, wherein the sensor slave unit detects or measures the drip or the number of drops in a measurement time based on the received measurement time setting signal. In the infusion measurement system according to claim 1 or 2,
The portable parent device can transmit a measurement start signal for starting measurement to the sensor slave device by a switch operation,
The drip measurement system, wherein the sensor slave unit detects or measures the dripping or the number of drippings when receiving the measurement start signal. In the drip measurement system according to any one of claims 1 to 3,
The drip measurement system, wherein the portable base unit includes a drip blinking unit that blinks at a drip interval obtained based on the received drip signal. In the drip measurement system according to any one of claims 1 to 4,
The portable master unit can transmit a monitoring start signal for setting the sensor slave unit to a monitoring mode to the sensor slave unit by a switch operation,
When the sensor slave unit receives the monitoring start signal, the measurement of the number of drops is repeatedly performed at a predetermined measurement time, and the measured number of drops is equal to or higher than a predetermined upper limit value or lower than a predetermined lower limit value. An infusion measurement system comprising an alarm mechanism for issuing an alarm. In the drip measurement system according to any one of claims 1 to 5,
The drip measurement system, wherein the portable master unit includes an illumination unit for illuminating the surroundings.

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