WO2010018627A1 - Système de notification d'état de patient - Google Patents

Système de notification d'état de patient Download PDF

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Publication number
WO2010018627A1
WO2010018627A1 PCT/JP2008/064528 JP2008064528W WO2010018627A1 WO 2010018627 A1 WO2010018627 A1 WO 2010018627A1 JP 2008064528 W JP2008064528 W JP 2008064528W WO 2010018627 A1 WO2010018627 A1 WO 2010018627A1
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WIPO (PCT)
Prior art keywords
condition
patient
lamp
mers
load
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PCT/JP2008/064528
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English (en)
Japanese (ja)
Inventor
雅人 志賀
忠幸 北原
諭 神子
直人 小島
志郎 福田
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株式会社MERSTech
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Priority to PCT/JP2008/064528 priority Critical patent/WO2010018627A1/fr
Priority to JP2009548515A priority patent/JP4441586B1/ja
Publication of WO2010018627A1 publication Critical patent/WO2010018627A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/024—Detecting, measuring or recording pulse rate or heart rate
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/316—Modalities, i.e. specific diagnostic methods
    • A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]

Definitions

  • the present invention relates to a patient condition notification system.
  • condition detection means such as a sphygmomanometer and an electrocardiograph
  • a nurse resident near the hospitalized patient is constantly monitored by a nurse resident near the hospitalized patient.
  • the anomaly alarm lamp placed near the patient's bed flashes, A sudden change in condition is immediately notified to the nurse by the abnormal signal output (see Patent Document 1).
  • Japanese Patent Laid-Open No. 9-38050 Japanese Patent Laid-Open No. 9-38050
  • the present invention has been made in view of the above circumstances, and provides a patient condition notification system capable of notifying a change in the condition of a patient at low cost and with high visibility by using existing lighting equipment. Is an exemplary problem.
  • a patient condition notification system as an exemplary aspect of the present invention includes a condition detection unit that detects a condition of a patient, a load power adjustment switch connected between a power source and an illumination lamp, Control means connected to the condition detection means and the load power adjustment switch, and for adjusting the brightness of the illumination lamp by changing the magnitude of the output voltage and the phase of the current of the load power adjustment switch based on the output signal from the condition detection means; It is characterized by having.
  • the load power adjustment switch has at least two reverse conducting semiconductor switches and a capacitor for accumulating the magnetic energy of the current at the time of current interruption and regenerating it to the illuminating lamp, and the gates of these reverse conducting semiconductor switches
  • the load power supplied to the illuminating lamp may be adjusted by controlling the phase.
  • the load power adjustment switch Since the brightness of the illuminating lamp is adjusted using the load power adjustment switch, there is no need to use an inverter circuit. Since the load power adjustment switch can be switched at zero voltage and zero current, the generation of harmonic noise is suppressed, and there is almost no adverse effect on precision equipment used in hospitals.
  • the condition detection means may be at least one of a sphygmomanometer, a pulse meter, an electrocardiograph, an electromyograph, an electroencephalograph, a respiratory detector, and an excretion detector.
  • condition detection means changes in the patient condition (blood pressure, pulse, electrocardiogram, myoelectricity, electroencephalogram, breathing, urine leakage and filth leakage) can be easily detected. And since the brightness
  • the patient condition notification system may further include condition determination means for determining an abnormal condition of the patient according to an output signal from the condition detection means, and outputting a condition abnormality signal indicating the condition abnormality when the condition is abnormal.
  • control means can be configured to adjust the brightness of the illuminating lamp according to the determination result (that is, abnormal / normal) by the condition deciding means, the condition of the patient for the nurse who visually recognizes the light / dark state of the illuminating lamp. It is easy to judge whether is normal or abnormal. For example, when it is normal (when the judgment result does not indicate an abnormality), the illumination lamp lights up at a normal brightness, and when it is abnormal (when the judgment result indicates an abnormality, the illumination lamp changes light and dark). By repeating, it can be judged at a glance whether the patient's condition is normal or abnormal.
  • the patient condition notification system may further include an abnormality notification means for notifying abnormality based on a condition abnormality signal.
  • notification by a separate abnormality notification means for example, voice notification at the nurse station, warning lamp notification, etc.
  • a separate abnormality notification means for example, voice notification at the nurse station, warning lamp notification, etc.
  • the present invention it is possible to notify a change in the condition of a patient at low cost and with high visibility by adjusting the brightness of an illumination lamp using existing lighting equipment. Since the brightness of the illuminating lamp is adjusted without using an inverter circuit, the generation of harmonic noise is suppressed, and there is almost no adverse effect on precision equipment used in hospitals.
  • FIG. 2A and FIG. 2B are diagrams for explaining MERS switching control by the control unit.
  • FIG. 3A and FIG. 3B are diagrams for explaining MERS switching control by the control unit.
  • FIG. 4A and FIG. 4B are diagrams for explaining MERS switching control by the control unit.
  • FIGS. 5A, 5 ⁇ / b> B, 5 ⁇ / b> C, and 5 ⁇ / b> D are diagrams for explaining operation results of the MERS embedded system. It is a graph which shows load voltage / rated voltage when changing gate phase angle (alpha). It is a figure which shows the other aspect of MERS. It is a figure which shows the other aspect of MERS. It is a block block diagram which shows schematic structure of the patient condition alerting
  • Ra Patient room Rb: Nurse station M: Patient 10: MERS embedded system 20: AC power supply 30: Magnetic energy regenerative switch (MERS) 32, 33, 34, 35, 36: Capacitor 40: Control unit (control means) 50: Inductive load 60: Lighting 70: Light control unit 72: Condition judging means 73: Receiver 74: Reference value 80: Pulse meter (condition detection means) 90: Abnormal alarm buzzer (abnormal alarm means) 100: Patient condition notification system SW1, SW2, SW3, SW4: Reverse conducting semiconductor switches D1, D2: Diodes
  • a patient condition notification system is connected between a power source and an illuminating lamp, and is output from the power source to the illuminating lamp.
  • the load power adjusting switch for adjusting the load power for lighting the illuminating lamp, and the load
  • a control unit that controls the power adjustment switch; and a condition detection unit that is connected to the control unit and detects the condition of the patient.
  • the load power adjustment switch is, for example, a magnetic energy regenerative switch (Magnetic Energy Recovery Switch: MERS) (hereinafter referred to as MERS).
  • MERS Magnetic Energy Recovery Switch
  • MERS for example, has four reverse-conduction-type elements that do not have reverse blocking capability, and can turn ON / OFF the current in both forward and reverse directions only by gate control, and the magnetic energy of the current when the current is cut off
  • a full bridge type MERS is disclosed.
  • an element capable of forward control such as a transistor having a power MOSFET or a diode connected in antiparallel.
  • the MERS is configured by connecting a bridge circuit composed of four semiconductor elements and a capacitor that absorbs and releases magnetic energy to the positive electrode and the negative electrode of the bridge circuit. And MERS can flow an electric current in either direction by controlling the gate phase of these four semiconductor elements.
  • MERS multi semiconductor elements located on a diagonal line among four semiconductor elements connected in a bridge form a pair, and the ON / OFF switching operation of the two pairs is performed in synchronization with the frequency of the power source. When one pair is on, the other pair is turned off. In addition, the capacitor repeatedly charges and discharges magnetic energy in accordance with the ON / OFF switching timing.
  • MERS controls the magnitude of the output voltage and the current phase of MERS by controlling the gate phase of two pairs of two semiconductor elements located on the diagonal line among the four semiconductor elements. It is possible to control arbitrarily.
  • the control unit also has a function of controlling the gate phase of the MERS in accordance with the detection result (output signal) from the condition detection means and adjusting the luminance of the illumination lamp. That is, a change in the condition of the patient can be notified to the outside by changing the luminance by changing the load power supplied to the illuminating lamp according to the condition of the patient.
  • MERS as a load power adjustment switch
  • a MERS embedded system in which MERS is connected in series between an AC power source and a dielectric load will be described as an example.
  • MERS can comprise an alternating current power supply device by incorporating it into an alternating current power source, and can constitute a MERS built-in load by incorporating it into an inductive load.
  • FIG. 1 is a diagram showing a basic configuration of the MERS embedded system 10.
  • the MERS embedded system 10 includes an AC power supply 20 and an inductive load 50 having inductance. As the inductive load 50, two 40 W fluorescent lamps are connected in parallel. MERS 30 is inserted between AC power supply 20 and inductive load 50.
  • the MERS embedded system 10 includes a control unit 40 that controls switching of the MERS 30.
  • the MERS 30 is a magnetic energy regenerative switch that can control currents in both forward and reverse directions and can regenerate magnetic energy to the load side without loss.
  • the MERS 30 includes a bridge circuit composed of four reverse conducting semiconductor switches SW1, SW2, SW3, and SW4, and an energy storage capacitor 32 that absorbs magnetic energy of a current flowing through the circuit when the bridge circuit is switched off. Prepare.
  • a reverse conducting semiconductor switch SW1 and a reverse conducting semiconductor switch SW4 are connected in series, a reverse conducting semiconductor switch SW2 and a reverse conducting semiconductor switch SW3 are connected in series, and they are connected in parallel. Is formed.
  • the capacitor 32 is at a connection point between the DC terminal DC (P) at the connection point between the reverse conduction type semiconductor switch SW1 and the reverse conduction type semiconductor switch SW3, and between the reverse conduction type semiconductor switch SW2 and the reverse conduction type semiconductor switch SW4. It is connected to a direct current terminal DC (N). Further, there is an alternating current between the AC terminal at the connection point between the reverse conduction type semiconductor switch SW1 and the reverse conduction type semiconductor switch SW4 and the AC terminal at the connection point between the reverse conduction type semiconductor switch SW2 and the reverse conduction type semiconductor switch SW3.
  • the power supply 20 and the inductive load 50 are connected in series.
  • a first pair of reverse conducting semiconductor switches SW1 and SW2 located on the diagonal line disposed in the MERS 30 and a second pair of reverse conducting semiconductor switches SW3 and SW4 also located on the diagonal line are connected to the power source. It is turned ON / OFF alternately in synchronization with the frequency. That is, when one pair is ON, the other pair is OFF. Then, for example, when an OFF gate is given to the first pair and an ON gate is given to the second pair, the current conducted in the forward direction becomes the second pair of reverse conduction type semiconductor switches SW3-capacitors 32.
  • the reverse conduction type semiconductor switch SW4 flows through the path, whereby the capacitor 32 is charged. That is, the magnetic energy of the circuit is stored in the capacitor 32.
  • the magnetic energy of the circuit at the time of current interruption is accumulated in the capacitor until the voltage of the capacitor 32 rises and the current becomes zero, and the current interruption is completed when the voltage of the capacitor 32 rises until the capacitor current becomes zero.
  • the ON gate is already given to the second pair, the charge of the capacitor 32 is discharged to the inductive load 50 through the reverse conducting semiconductor switches SW3 and SW4 which are turned on and accumulated in the capacitor 32. Magnetic energy is regenerated to the inductive load 50.
  • a pulse voltage is applied to the inductive load 50.
  • the magnitude of the voltage depends on the capacitance of the capacitor 32 and the reverse conduction type semiconductor switches SW1 to SW4 and the inductive load 50 are resistant to each other. It can be within the allowable voltage range. Further, unlike the conventional series power factor correction capacitor, a direct current capacitor can be used for MERS30.
  • the reverse conducting semiconductor switches SW1 to SW4 are made of, for example, power MOSFETs and have gates G1, G2, G3, and G4, respectively. Body diodes (parasitic diodes) are connected in parallel to the channels of the reverse conducting semiconductor switches SW1 to SW4.
  • a diode may be added in reverse parallel to the reverse conducting semiconductor switches SW1 to SW4.
  • the reverse conducting semiconductor switches SW1 to SW4 for example, an element such as an IGBT or a transistor having a diode connected in antiparallel can be used.
  • the control unit 40 controls switching of the reverse conducting semiconductor switches SW1 to SW4 of the MERS 30. Specifically, a pair ON / OFF operation composed of reverse conducting semiconductor switches SW1, SW2 located on a diagonal line in the bridge circuit of MERS 30 and a pair ON / OFF operation composed of reverse conducting semiconductor switches SW3, SW4 are provided.
  • the control signal is transmitted to the gates G1 to G4 so that each of them is simultaneously performed every half cycle so that when one is ON, the other is OFF.
  • 2A, 2 ⁇ / b> B, 3 ⁇ / b> A, 3 ⁇ / b> B, 4 ⁇ / b> A, and 4 ⁇ / b> B are diagrams for explaining switching control of the MERS 30 by the control unit 40.
  • the control unit 40 turns on the reverse conducting semiconductor switches SW1 and SW2 in a state where the capacitor 32 has no charging voltage, as shown in FIG. 2A, the current is reverse conducting semiconductor switches SW3 and SW1. And a path passing through the reverse conduction type semiconductor switches SW2 and SW4, and enters a parallel conduction state.
  • the control unit 40 turns off the reverse conducting semiconductor switches SW1 and SW2 at a predetermined timing before the voltage of the AC power supply 20 is reversed, for example, about 2 ms. (This corresponds to a gate phase angle ⁇ for controlling the reverse conducting semiconductor switch of about 36 deg when the AC frequency is 50 Hz.)
  • FIG. It flows through a path passing through the type semiconductor switch SW3-capacitor 32-reverse conducting type semiconductor switch SW4.
  • the magnetic energy is absorbed (charged) in the capacitor 32.
  • the reverse conducting semiconductor switches SW3 and SW4 are turned on at the timing when the reverse conducting semiconductor switches SW1 and SW2 are turned off.
  • the current is cut off.
  • the reverse conducting semiconductor switches SW3 and SW4 are already ON, and the capacitor 32 has a charging voltage. Therefore, as shown in FIG. It flows through a path passing through the semiconductor switch SW4-capacitor 32-reverse conducting semiconductor switch SW3. Then, the magnetic energy accumulated in the capacitor 32 is released (discharged).
  • the control unit 40 turns off the reverse conducting semiconductor switches SW3 and SW4.
  • the current flows through a path passing through the reverse conducting semiconductor switch SW1-capacitor 32-reverse conducting semiconductor switch SW2.
  • the reverse conducting semiconductor switches SW1 and SW2 are turned on at the timing when the reverse conducting semiconductor switches SW3 and SW4 are turned off.
  • the MERS 30 can flow a current in both directions by alternately bringing two pairs of opposing conductive semiconductor switches facing each other into a conductive state.
  • FIGS. 5A, 5B, 5C, and 5D show the MERS embedded system 10 in the case where the gate phase angle ⁇ for controlling the reverse conducting semiconductor switch is about 36 deg when the AC frequency is 50 Hz. It is a figure for demonstrating the operation result of. 5A shows the waveforms of the power supply voltage and current when the MERS 30 is not incorporated, and FIG. 5B shows the waveforms of the power supply voltage, current, and load voltage when the MERS 30 is incorporated. Yes.
  • FIG. 5C shows the waveform of the capacitor voltage and the current flowing through the reverse conducting semiconductor switch SW1, and FIG. 5D shows the timing when the reverse conducting semiconductor switch SW1 is turned on.
  • the phase of the current is delayed from the phase of the power supply voltage due to the influence of the inductive load 50. Therefore, the power factor of the AC power supply 20 is smaller than 1.
  • the MERS 30 is inserted in series between the AC power supply 20 and the inductive load 50, the phase of the current can be advanced as shown in FIG. Can be 1.
  • the MERS 30 stores the magnetic energy of the inductive load 50 in the capacitor 32 by adjusting the gate phase of the two pairs on the diagonal line of the reverse conducting semiconductor switches SW1 to SW4, and advances the phase of the current.
  • the power factor of the AC power supply 20 can be set to 1.
  • the MERS 30 can not only advance the phase of the current but also can arbitrarily control the phase of the current, whereby the power factor can be arbitrarily adjusted.
  • the load voltage can be increased or decreased steplessly.
  • FIGS. 5A, 5 ⁇ / b> B, 5 ⁇ / b> C, and 5 ⁇ / b> D are obtained when the gate phase angle ⁇ for controlling the reverse conducting semiconductor switch is about 36 deg when the AC frequency is 50 Hz.
  • the gate phase angle ⁇ for controlling the reverse conducting semiconductor switch of the MERS 30 can be continuously controlled from 0 deg to 180 deg.
  • FIG. 6 shows measured values of load voltage / rated voltage when the gate phase angle ⁇ for controlling the reverse conducting semiconductor switch is changed when two 40 W fluorescent lamps are used as loads.
  • the rated voltage is a voltage corresponding to 100% of the power supply voltage.
  • the charging / discharging cycle of the capacitor 32 is a half cycle of the resonance cycle of the inductive load 50 and the capacitor 32.
  • the MERS 30 has a gate phase angle ⁇ . Regardless of the case, zero voltage zero current switching, that is, soft switching is always possible.
  • the capacitor 32 used in the MERS 30 is only for storing the magnetic energy of the inductance in the circuit. For this reason, the capacitor capacity can be significantly reduced as compared with the voltage source capacitor of the conventional voltage type inverter.
  • the capacitor capacity is selected so that the resonance period with the load is shorter than the switching frequency. For this reason, harmonic noise that tends to be a problem in the conventional voltage type inverter hardly occurs in the switching in the MERS 30. Therefore, adverse effects caused by harmonic noise on precision instruments and measuring instruments hardly occur in MERS 30, and MERS 30 can be used with peace of mind in hospitals and the like. Moreover, since it is soft switching, there is little power loss and there is also little heat_generation
  • each MERS 30 can be given a unique ID number, and this can be used to control each MERS 30 by receiving an external control signal.
  • the MERS 30 can be wirelessly controlled by sending a control signal wirelessly using a communication line such as the Internet.
  • the MERS 30 has a configuration including a bridge circuit formed by four reverse conducting semiconductor switches SW1 to SW4 and a capacitor 32 connected between the DC terminals of the bridge circuit. May have the following configuration.
  • FIG. 7 and 8 are diagrams showing other modes of the MERS 30.
  • FIG. The MERS 30 shown in FIG. 7 has two reverse-conducting semiconductor switches, two diodes and two full-conducting MERS 30 composed of the four reverse-conducting semiconductor switches SW1 to SW4 and one capacitor 32 described above. It is a vertical half-bridge type composed of two capacitors.
  • the vertical half-bridge structure MERS 30 is provided in parallel with two reverse conducting semiconductor switches SW5 and SW6 connected in series, and the two reverse conducting semiconductor switches SW5 and SW6. It includes two capacitors 33 and 34 connected in series, and two diodes D1 and D2 connected in parallel with the two capacitors 33 and 34, respectively.
  • the MERS 30 shown in FIG. 8 is a horizontal half-bridge type.
  • the horizontal half-bridge MERS is composed of two reverse conducting semiconductor switches and two capacitors.
  • the horizontal half-bridge structure MERS 30 includes a reverse conducting semiconductor switch SW7 and a capacitor 35 provided in series on the first path, and a series on a second path parallel to the first path. Includes a reverse conducting semiconductor switch SW8 and a capacitor 36, and wirings connected in parallel to the first and second paths.
  • FIG. 9 is a schematic diagram showing the configuration of the patient condition notification system 100 according to the embodiment of the present invention.
  • the patient condition notification system 100 is mainly used in a hospital room Ra for an inpatient M in a hospital.
  • the patient condition notification system 100 may be configured using existing lighting equipment in the hospital room Ra.
  • a patient condition notification system 100 includes a pulse meter (condition detection means) 80 that measures a patient's pulse, MERS 30, a dimming control unit 70, and an abnormality notification buzzer (abnormality notification means). ) 90, and an illuminating lamp (lighting fixture) 60 for a hospital room, an AC power source 20 and a MERS 30 are connected in series. Further, the dimming control unit 70 is configured to be connected to the pulse meter 80, the MERS 30, and the abnormality notification buzzer 90.
  • the illuminating lamp 60 is, for example, an illuminating lamp having an inductive load, an illuminating lamp connected to the inductive load, or an illuminating lamp having a resistive load.
  • Examples of the illumination lamp having an inductive load include a discharge lamp.
  • the discharge lamp is, for example, a fluorescent lamp, a mercury lamp, or a sodium lamp.
  • examples of the illuminating lamp connected to the inductive load include an incandescent lamp that does not have an inductive load, a light source such as an LED, and a reactor connected thereto.
  • an incandescent lamp, LED, etc. are mentioned as an illumination lamp which has a resistive load.
  • the illuminating lamp 60 an indoor lamp already installed in the hospital room Ra can be used. In this embodiment, a case where a discharge lamp is used as the illumination lamp 60 will be described as an example.
  • the pulse meter 80 is a precision measuring instrument for continuously measuring the pulse of the patient M and continuously outputting the measured value as an output signal.
  • the pulse is one of the vital reaction values indicating the condition of the patient M. That is, it can be determined whether the condition of the patient M is good or bad according to the value of the pulse.
  • the pulsometer 80 is used as the condition detecting means, but of course, a pulsometer that measures the pulse of the patient M, an electrocardiograph that measures the electrocardiogram, or the like may be used.
  • An output signal from the pulse meter 80 is output to the dimming control unit 70.
  • the dimming control unit 70 transmits a control signal to the gates G1 to G4 of the reverse conducting semiconductor switches SW1 to SW4, and controls the magnitude of the output voltage of the MERS 30 and the phase of the current ( Control means) 40.
  • the brightness of the illuminating lamp 60 is adjusted by controlling the magnitude of the output voltage and the phase of the current.
  • the control unit 40 is connected to the MERS 30 and is connected to the pulse meter 80 via the condition determination means 72. Therefore, it is possible to adjust the brightness of the illuminating lamp 60 by adjusting the magnitude of the output voltage of the MERS 30 and the phase of the current in accordance with the output signal from the pulse meter 80.
  • the control unit 40 causes the MERS 30 to turn on the illumination lamp 60 with a luminance sufficient to ensure the necessary illuminance during normal times (that is, when there is no abnormality in the condition of the patient M).
  • the output voltage and current phase are adjusted.
  • an abnormality signal (condition abnormality signal) is received from the condition determination means 72.
  • the control part 40 is the magnitude
  • the phase of the current are adjusted periodically.
  • the illuminating lamp 60 periodically changes in brightness, but the illuminating lamp 60 is not turned off even in the dark. Therefore, it is possible to increase the periodic response speed of the change in brightness and to improve the durability of the lighting equipment.
  • the dimming control unit 70 further includes condition determination means 72.
  • This condition determination means 72 determines the condition abnormality of the patient M according to the output signal from the pulse meter 80, and outputs a condition abnormality signal indicating the condition abnormality when the condition is abnormal.
  • the condition determination means 72 has a receiving unit 73 inside, and the receiving unit 73 receives an output signal (pulse rate) from the pulse meter 80.
  • the output signal (pulse rate) is, for example, a pulse value converted per minute, and is obtained as a numerical value such as 70 pulses / minute or 100 pulses / minute.
  • the abnormality notification buzzer 90 is used to notify an abnormality when a sound is generated, and is installed in the nurse station Rb. Of course, it may be installed in the hospital room Ra of the patient M or in the hallway of the hospital. When the abnormality signal from the condition determining means 72 is received, the abnormality notification buzzer 90 generates a notification sound for notifying the abnormality.
  • step S1 When the patient condition notification system 100 is activated (step S1), the dimming control unit 70 increases the output voltage of the MERS 30 so that the load power to the illumination lamp 60 is lit with a luminance sufficient to ensure the necessary illuminance. And the phase of the current are adjusted (step S2). At this time, the illuminating lamp 60 is lit with a luminance sufficient to ensure the necessary illuminance.
  • the pulse meter 80 is set on the patient M and connected to the dimming control unit 70 (step S3). Thereby, the pulse of the patient M is continuously measured and output to the receiving unit 73 (step S4). At the same time, the received pulse rate is compared with the reference value 74 (step S5). If the pulse rate is greater than or equal to the reference value 74 (step S6), the condition determination means 72 does not output an abnormal signal (step S7).
  • the condition determination means 72 outputs an abnormal signal to the control unit 40 and the abnormality notification buzzer 90 (step S8).
  • the control unit 40 periodically adjusts the magnitude of the output voltage of the MERS 30 and the phase of the current (step S9).
  • the illumination lamp 60 periodically changes in brightness (step S10). Since the illumination lamp 60 of the hospital room Ra periodically changes in brightness, for example, a nurse in the nurse station Rb or a nurse walking in the hallway outside the hospital room Ra is likely to notice the abnormal condition of the patient M.
  • the illumination lamp 60 In normal times (when the condition of the patient M is normal), the illumination lamp 60 is lit at normal brightness at the rated load power, and the illumination lamp 60 periodically changes in brightness when the condition is abnormal. It is easy to make an alternative decision. Furthermore, since the abnormality notification buzzer 90 that has received the abnormality signal notifies the abnormality with the notification sound (step S11), the condition abnormality of the patient M can be grasped more quickly and reliably.
  • the pulsometer 80 is used as the condition detecting means, and the condition determining means 72 has the reference value 74.
  • the condition detecting means includes a sphygmomanometer, an electrocardiograph, and the like. It is possible to apply other measuring instruments.
  • the reference value 74 may have a plurality of values (upper limit value and lower limit value) as well as a single value, or may have a predetermined reference range. In the case of an electrocardiograph or electromyograph, the reference value 74 may be a predetermined pattern or profile instead of a numerical value.
  • the pulsometer 80 is connected to the condition determination means 72, the condition determination means 72 is connected to the control unit 40, and the control unit 40 is based on the abnormal signal from the condition determination means 72.
  • the pulse meter 80 may be directly connected to the control unit 40, and the control unit 40 may be configured to adjust the magnitude of the output voltage of the MERS 30 and the phase of the current according to the pulse rate.
  • the brightness of the illuminating lamp 60 may be adjusted so as to be proportional to the pulse rate. If comprised in this way, according to the brightness of the illumination light 60, the patient's M pulse rate can be estimated roughly.
  • the inverter circuit As an apparatus capable of dimming the illumination lamp, for example, there is an inverter fluorescent lamp generally used in homes and offices.
  • the inverter circuit since the inverter circuit generates a large amount of electromagnetic noise, it can be used in precision hospitals and computer rooms. Use is restricted in environments where various electronic devices are used.
  • THD harmonic distortion
  • the THD of the bulb-type fluorescent lamp 17. 128.2%
  • THD of a stand-type fluorescent lamp 15 W
  • 82.6% In the incandescent lamp (60 W) for comparison, THD is 3.1%.
  • the THD of a circuit using MERS was similarly measured with a digital oscilloscope with harmonic analysis function, and the capacitor value was completely resonant.
  • the load voltage THD is 4.5%
  • the load current THD is 2.1%
  • the capacitor value is about 10% less than the complete resonance state (7.9 ⁇ F).
  • THD of load voltage 14.1%
  • THD of load current 3.7% (all values are only MERS circuit parts excluding inductive load itself), and generation of harmonics is very small.
  • the patient condition notification system since the patient condition notification system according to the present invention does not generate harmonics, it can generally be used in hospitals. Of course, it can be used not only as a hospital but also as a notification system using various indoor lighting facilities.

Abstract

La présente invention concerne un système de notification d'état de patient (100) qui comprend les éléments suivants : un moniteur d'impulsion (80) destiné à détecter l'état d'un patient (M) ; un MERS (30) raccordé à une alimentation en courant alternatif (20) et à une lampe d'éclairage (60) ; et un dispositif de commande (40) raccordé au moniteur d'impulsion (80) et au MERS (30), qui règle la luminosité de la lampe d'éclairage (60) en modifiant l'ampleur de la tension de sortie et la phase du courant du MERS (30), selon le signal de sortie provenant du moniteur d'impulsion (80).
PCT/JP2008/064528 2008-08-13 2008-08-13 Système de notification d'état de patient WO2010018627A1 (fr)

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PCT/JP2008/064528 WO2010018627A1 (fr) 2008-08-13 2008-08-13 Système de notification d'état de patient
JP2009548515A JP4441586B1 (ja) 2008-08-13 2008-08-13 患者容態報知システム

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JP7323387B2 (ja) 2019-05-10 2023-08-08 フクダ電子株式会社 生体情報モニタ装置、生体情報モニタ装置のアラーム制御方法、及び生体情報モニタ装置のアラーム制御プログラム

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