JP4490089B2 - Wireless telemeter, central monitor and patient monitoring system using them - Google Patents

Description

  The present invention relates to a radio telemeter, a central monitor, and a patient monitoring system using them.

A biological information telemeter (wireless telemeter) acquires biological information such as an electrocardiogram, respiration, blood pressure, body temperature, and blood oxygen saturation (Sp0 ₂ ) from an electrode or sensor attached to the patient, and wirelessly communicates the acquired biological information. For example, it has a function of transmitting to a central monitor provided in, for example, a nurse station. The central monitor is usually communicable with a plurality of wireless telemeters, and can grasp and manage the states of a plurality of patients remotely and centrally (see, for example, Patent Document 1).

JP 2002-191565 A

  A patient who uses a biological information telemeter is basically a patient who needs constant monitoring, and it is not uncommon for the patient to be unable to move his / her body freely. When such a patient falls from a bed, for example, it is necessary to deal with it immediately, but the central monitor cannot detect such a state change unless there is an abnormality in the biological information.

  Also, when nursing a patient with dementia, etc., it is possible to remotely know that the patient has left the bed in order to prevent accidents such as the patient moving away from the bed and falling from the stairs. Is desirable.

  The present invention has been made in view of such problems of the prior art, and its main purpose is to enable remote detection of a patient leaving the bed easily using an existing system. It is to be.

That is, the gist of the present invention is an antenna for transmitting and receiving a radio signal, a first receiving means for receiving bed identification information unique to the bed via the antenna, and a living body for acquiring a biological signal of a patient. a signal acquisition means, and the bed identification information received by the first receiving means, have a first transmission means for transmitting to the central monitor by radio signal via an antenna and acquired biological signals and bed identification information if it can not receive the first transmission means consists in a radio telemeter, characterized in Rukoto used as bed identification information received the predetermined information.

  Another gist of the present invention is a central monitor capable of receiving radio signals from a plurality of radio telemeters, wherein a biological signal detected by the radio telemeter is acquired from the radio signals, and at least one of display and recording is obtained. Output means for performing bed identification information acquisition means for acquiring bed identification information received by the wireless telemeter or information on the reception result of bed identification information in the wireless telemeter, and bed identification information or wireless received by the wireless telemeter from the wireless signal A central monitor comprising: detection means for detecting bed leaving of a patient corresponding to a radio telemeter, and second notification means for reporting detection of bed leaving based on information relating to a reception result of bed identification information in the telemeter. Exist.

  Another gist of the present invention is that a bed identification information transmitting means attached to a bed and transmitting bed identification information unique to the bed by a radio signal, the wireless telemeter of the present invention, and the central monitor of the present invention. Having a patient monitoring system.

  According to the present invention, it is possible to remotely detect that a patient has left the bed using an existing patient monitoring system.

Hereinafter, the present invention will be described in detail based on preferred embodiments with reference to the drawings.
● «First Embodiment»
FIG. 1 is a diagram illustrating a configuration example of a patient monitoring system according to an embodiment of the present invention. A patient monitoring system shown in FIG. 1 includes a bed identification information transmitter 110 and an antenna 120 installed in a patient's bed, a portable wireless telemeter 200, and a central monitor 300 that receives and manages biological information transmitted by the wireless telemeter 200. It consists of and.

  FIG. 2 is a diagram schematically showing a state during use of the patient monitoring system in the present embodiment. The bed identification information transmitter 110 is attached to the frame of the bed used by the patient or installed on the floor. And the different identification information for every bed is transmitted from the antenna 120 arrange | positioned under a bed mat (FIG. 2 (a)). The antenna 120 is a planar antenna, and is configured by a spiral sheet coil in the present embodiment.

  A patient lies on a bed mat, and a radio telemeter 200 attached to the patient continuously acquires biological information such as an electrocardiogram and transmits it to a central monitor (not shown). In the present embodiment, the wireless telemeter 200 receives the bed identification information transmitted from the bed identification information transmitter 110 via the antenna 120, and transmits the received bed identification information to the central monitor in the same manner as the biological information. In addition, the central monitor has a function of detecting bed identification information from the received information.

  By appropriately setting at least one of the transmission intensity of the bed identification information transmitter 110 and the reception sensitivity of the radio telemeter 200, the bed identification information can be received by the radio telemeter 200 when the patient is lying on the bed. However, if the patient falls from the bed or stands up and leaves the bed, the bed identification information cannot be received.

  Specifically, the reception sensitivity in the bed identification information receiver 220 is previously unified among a plurality of wireless telemeter devices, and then the bed identification information receiver 220 receives the bed identification information within a predetermined range of the space on the bed. The transmission intensity of the bed identification information transmitter 110 (more precisely, the magnetic field intensity output from the antenna 120) is adjusted so that reception is possible.

  For example, if the central monitor 300 detects that the reception of the bed identification information by the wireless telemeter 200 has been interrupted, it can be known at a remote location without delay that the patient has left the bed. .

  Hereinafter, the configuration and operation of the patient monitoring system of the present embodiment will be described in more detail with reference to FIGS. 1 and 3 to 5.

  The bed identification information transmitter 110 uses a known wireless modulation circuit having an internal transmission circuit, a high-frequency modulation circuit, an amplifier, and the like to set different identification information for each bed set in, for example, a nonvolatile rewritable memory (NVRAM). The signal is converted into a radio frequency signal and periodically transmitted from the antenna 120.

  The bed identification information transmitted from the antenna 120 is received by the antenna 215 of the radio telemeter 200 and demodulated into the original bed identification information by the bed identifier receiver 220 including a demodulation circuit. The demodulated bed identification information is supplied to the control unit 240 that controls the radio telemeter 200 (FIG. 3, step S101).

  On the other hand, the biological signal acquisition circuit 230 continuously acquires biological information input from, for example, electrodes or sensors attached to the patient's body surface (step S103), and performs necessary signal processing such as analog / digital conversion. And supply to the control unit 240 (step S105).

  The control unit 240 includes, for example, a CPU that executes a program recorded in a nonvolatile memory, a RAM that is used for a work area, an NVRAM that stores various settings, and the like, and controls the operation of the radio telemeter 200. Further, the control unit 240 supplies the bed identification information from the bed identification information receiver 220 and the biological information from the biological signal acquisition circuit 230 to the high frequency modulation unit 250.

  At this time, the control unit 240 supplies the biological information and the bed identification information to the high frequency modulation unit 250 according to a predetermined data format. For example, in the case of transmission as packet data, in addition to preset patient identification information and / or telemeter device identification information, date and time information, etc., bed identification information is included in header information, and biological information is included as data A packet is formed and supplied to the high frequency modulation unit 250 (step S107). If the bed identification information cannot be received in step S101, predetermined identification information indicating that fact is included in the header as bed identification information.

  The high frequency modulation section 250 converts the data supplied from the control section 240 into a predetermined radio frequency signal and transmits it through the antenna 210, similarly to the radio modulation circuit included in the bed identification information transmitter 110 (step S109).

  Although not shown in FIG. 1, the radio telemeter 200 also displays an operation unit for a patient to give various operations and instructions to the radio telemeter 200, an operation state of the radio telemeter 200, and the like. Part, an audio output part, etc. are included, but they are not directly related to the present invention and will not be described.

  For example, in the central monitor 300 disposed in a remote place such as a nurse station, the receiver 320 receives the radio frequency signals from the plurality of radio telemeters 200 via the antenna 310, and performs processing reverse to that at the time of transmission such as demodulation. To obtain packet data. Then, the obtained packet data is supplied to the control unit 330 (FIG. 4, step S201).

  The control unit 330, like the control unit 240 in the radio telemeter 200, includes, for example, a CPU that executes a program recorded in a non-volatile memory, a RAM that is used in a work area, an NVRAM that stores various settings, and the like. To control. The control unit 330 refers to, for example, header information of the packet data supplied from the receiver 320, and determines which patient the data relates to. Then, for example, data is written in a folder corresponding to the patient, which is present in the recording unit 350 including a large-capacity storage device such as a hard disk drive, and biological information is displayed on the display unit 340 (step S205).

  Further, the control unit 330 acquires bed identification information and patient identification information or wireless telemeter identification information from the header information of the packet data (step S207), and whether the bed identification information is obtained (step S211). When the bed identification information is obtained, the correspondence table preset in the recording unit 350 is referred to as necessary, and the patient (or the telemeter worn by the patient) and the bed identification information are It is checked whether the correspondence is correct (step S213).

  Note that it is not essential to check whether the obtained bed identification information correctly corresponds to the patient (or the wireless telemeter used by the patient) (step S213). However, by performing this check, for example, the patient can be shortened. It is possible to detect correctly even when the user leaves the bed without receiving the bed identification information, such as when moving to the next bed in time.

  When it is confirmed that the bed identification information is not received in step S211, or when it is confirmed that the wrong bed identification information is received in step S213, the display unit 340 and / or the audio output unit In 350, the detection of getting out of bed is notified by a message or voice (step S215). As a result, the parties waiting around the central monitor can know the patient's bed remotely.

● << Modification of the first embodiment >>
Note that the control unit 240 of the radio telemeter 200 does not transmit the received bed identification information itself, but transmits information indicating whether or not the bed identification information is received in a header, or whether or not the bed identification information is received or received. Information including any one of four types of whether the bed identification information is correct (or no reception of bed identification information and reception of correct / incorrect bed identification information) is included in the header and transmitted. May be.

  The latter case will be further described with reference to FIG. In FIG. 5, the same processing steps as those in FIG. In step S101, bed identification information reception processing is performed to check whether bed identification information has been received (step S111). Next, if the bed identification information is received, for example, the preset bed identification information to be detected is compared with the bed identification information actually received by the bed identification information receiver 220, so that they match. It is determined whether or not (step S113). Then, information representing one of these three types is included in the header to generate transmission packet data (step S107).

  Furthermore, if there is no reception or incorrect bed identification information has been received, the radio telemeter 200 may notify the user by voice (step S115).

  When these determination operations are performed in the radio telemeter 200, an equivalent check operation on the central monitor 300 side is simplified. That is, when the radio telemeter 200 checks whether or not the bed identification information has been received and transmits information indicating the presence or absence of reception (for example, either 0 or 1) in the header information, the control unit 330 transmits this information in step S207. Check the value of the information. In addition, as shown in FIG. 5, the radio telemeter 200 has four types of reception / non-reception of bed identification information and whether the reception bed identification information is correct (or no reception of bed identification information, correct / incorrect bed identification information). In the case of transmitting information representing any one of the three types of reception, the control unit 330 only needs to check the content of the information in step S207.

  As described above, according to the present embodiment, by adding a simple configuration to a conventionally used patient monitoring system, it is possible to know the patient's bed remotely and without delay, and appropriate treatment can be performed. Can be taken immediately.

  In addition, even when a wireless telemeter notifies when a bed is detected, the nursing staff in the vicinity can recognize the bed and can respond more quickly.

● «Other Embodiments»
In the above-described embodiment, only the configuration using the existing patient monitoring system has been described for ease of application and ease of explanation. However, not all functions in the existing patient monitoring system are necessary in the present invention. For example, from the viewpoint of getting out of bed, a configuration relating to detection and processing of biological information in a wireless telemeter is unnecessary, and a display and recording function of biological information in a central monitor is also unnecessary.

  In other words, as long as it is possible to detect whether or not the bed-specific identification information transmitted from the bed is correctly received by the receiver attached to the patient, other functions can be used. Can be added or reduced as necessary.

It is a figure which shows the structural example of the patient monitoring system which concerns on embodiment of this invention. It is a figure which shows typically the state at the time of use of the patient monitoring system of FIG. It is a flowchart which shows the operation example of the radio telemeter which concerns on embodiment of this invention. It is a flowchart which shows the operation example of the central monitor which concerns on embodiment of this invention. It is a flowchart which shows another example of operation | movement of the radio | wireless telemeter which concerns on embodiment of this invention.

Claims (8)

An antenna for transmitting and receiving radio signals;
First receiving means for receiving bed identification information unique to the bed via the antenna;
A biological signal acquisition means for acquiring a biological signal of a patient;
Have a first transmission means for transmitting the bed identification information received by the first receiving means, and the obtained biological signal to the central monitor by radio signal via the antenna,
Wherein when the bed identification information can not be received, the first transmission means, wireless telemetry, characterized in Rukoto using predetermined information as the bed identification information thus received. Wherein when the bed identification information can not be received, the first addition claim 1 Symbol placement of wireless telemetry and having a notification means for notifying to that effect. Furthermore, it has the 1st determination means which determines whether the said received bed identification information is the bed identification information which should be received,
3. The radio telemeter according to claim 1, further comprising second notifying means for notifying that the received bed identification information is not the bed identification information to be received. 4. A central monitor capable of receiving radio signals from a plurality of radio telemeters,
An output means for acquiring a biological signal detected by the wireless telemeter from the wireless signal and performing at least one of display and recording;
Bed identification information acquisition means for acquiring bed identification information received by the wireless telemeter or information regarding a reception result of bed identification information in the wireless telemeter from the wireless signal;
Detection means for detecting a bed of a patient corresponding to the wireless telemeter based on the bed identification information received by the wireless telemeter or information on the reception result of the bed identification information in the wireless telemeter;
A central monitor having a bed leaving notification means for reporting the detection of the bed leaving . When the bed identification information received by the wireless telemeter indicates that the bed identification information could not be received by the wireless telemeter, the detection means considers that the patient corresponding to the wireless telemeter has left the bed. The central monitor according to claim 4 . The detection means is that the information related to the reception result of the bed identification information in the wireless telemeter is that the bed identification information could not be received in the wireless telemeter or the bed identification information received in the wireless telemeter should be received. 6. The central monitor according to claim 4 or 5 , wherein when the information is not information, the patient corresponding to the wireless telemeter is regarded as having left bed. Further, the bed identification information received by the wireless telemeter has second determination means for determining whether the bed identification information is to be received,
Claim 4 wherein said detecting means, when the bed identification information the wireless telemeter received is not a bed identification information to be received; patient corresponding to the wireless telemetry is characterized in that deemed to have liftoff The central monitor according to claim 6 . The bed identification information transmitting means attached to the bed and transmitting bed identification information specific to the bed by a wireless signal, the wireless telemeter according to any one of claims 1 to 3 , and the claims 4 to 4. The patient monitoring system using the central monitor of any one of claim | item 7 .

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