JP2000140092A - Method and device for monitoring medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve operability and reliability and provide to the market at a low price by a new, compact equipment configuration in the monitoring of a medium relating to medium introduction, medium replacement and medium discharge through a tube. SOLUTION: The equipment configuration (i1) relates to infusion injection by specific gravity or pressure (e.g. instillation). A series closed circuit that forms capacity coupling with an infusion as a conductive path and resistance connects using an infusion as a conductive channel, and resistance coupling through a living body H by providing a pipeline 1 that is connected to an infusion container 8 (e.g. instillation cylinder) and has a metal needle or a capillary 11 mounted on the front end thereof, a terminal electrode 2 provided at least in one part of the pipeline 1, one terminal electrode 3 disposed in a living body H near a needle section or a capillary section 11, an alternating power supply 4, and a monitor 5 to extract an electrical condition between the terminal electrodes 2 and 3, connecting the terminal electrodes 2 and 3 through the monitor 5, and applying alternating voltage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for introducing a medium into or into a living body through a tube having a metal needle or a thin tube at the tip thereof, exchanging a medium for a living body, or exchanging a medium from a living body. A medium monitoring method for monitoring the continuity of the flow of a medium in a medium path including the tube (hereinafter referred to as a pipe line) when detecting the abnormality, and detecting an abnormality thereof to promote a safe treatment. Related to the device. Here, the medium is
Most media involved in living organisms are conductive fluid media, as they are.

[0002]

2. Description of the Related Art Conventionally, infusion in which a medium is introduced into or into a living body through a tube having a metal needle or a thin tube attached to the tip thereof, the amount of infusion remaining,
Various media monitoring that monitors or controls the infusion speed (or the number of droplets), the presence or absence of bubbles in the solution, the end of the infusion, etc., and detects and reports abnormalities (including notification to nurse centers etc.). A device has been proposed. In addition, there has also been proposed a medium monitoring device that detects abnormalities in medium operation and prompts safe treatment in perfusion for exchanging a medium for a living body and drainage for removing the medium from a living body. Are known.

[0003]

However, no circuit has been found in which a circuit (or a signal line) is constituted by using the medium itself flowing in the pipeline as a conductive path to achieve various objective effects in the operation of the medium. .

The present invention has been made in view of such circumstances, and provides a method and apparatus for monitoring a medium with improved operability and reliability by a new and more compact apparatus configuration. Moreover, the device is inexpensive.

[0005]

SUMMARY OF THE INVENTION In order to solve the problems, the present invention provides a medium for a living body by introducing a medium into or onto a living body through a tube having a metal needle or a thin tube attached to the tip. When replacing or removing the medium from the organism,
A medium monitoring method and apparatus for monitoring the continuity of the flow of a medium in a pipeline and detecting an abnormality thereof to promote a safe treatment, wherein a terminal electrode is provided on each of a tube and a living body, Closed circuit (series or parallel) or signal that is connected and wired to a power supply or a transmitter, is capacitively coupled to the flowing medium as a conductive path, and is resistively connected or capacitively coupled to the medium via a living body. A line is configured to monitor and extract the electrical state between the terminal electrodes of the closed circuit or the signal line, and determine and output the information by relating the flow to the medium and / or the characteristic phenomenon relating to the behavior of the living body. It is a feature.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The method and the apparatus according to the present invention, in the above-described configuration, are configured so that, as the monitor information to be output as information, extubation information relating to needle omission, bubble information relating to the presence or absence of bubbles generated in the infusion, and tube information. The information includes pipe disconnection information relating to blockage or disconnection of a path, medium operation end information relating to liquid shortage, and pipe hold information relating to a change in impedance between terminal electrodes due to a change in a component such as touching a conduit.

[0007] Further, in the case where leak information of a medium in a living body is requested as monitor information to be output,
In the vicinity of a puncture portion or a thin tube insertion portion of a living body, terminal electrodes are separately arranged at least at two places on the left and right sides of the site,
An independent closed circuit is formed by connecting the terminal electrodes at both ends, a constant current voltage is applied to the circuit, and an amplifier is connected to the left and right terminal electrodes adjacent to the puncture portion or the capillary insertion portion. A monitoring device is connected, and means is configured to monitor and extract a voltage change between the left and right terminal electrodes adjacent to the needle insertion portion or the thin tube insertion portion.

[0008] Further, in the device configuration, there are cases where a plurality of input terminals are provided in the monitor device to form a plurality of closed circuits or signal lines. Then, the input is electronically switched to sequentially connect to the closed circuit or the signal line during the operation of the medium, and the electrical state between the terminal electrodes of the closed circuit or the signal line is monitored and extracted. According to this, it is possible to cope with continuous infusion (for example, continuous infusion) for infusion infusion (for example, infusion). (Refer to the i6 type to be described later for the device that constitutes a closed circuit)

The difference between the configuration of the closed circuit and that of the signal line can be considered to be that the conductive path (lead wire) between the AC power supply and the monitor device in the closed circuit is grounded.

By the way, the monitoring mode or the management mode can be changed by enlarging or reducing the device scale and the monitoring / reporting area.

For example, regarding infusion of an infusion, a terminal electrode provided in at least one place of a conduit is arranged near a needle or a thin tube, and a monitor device is attached to a living body or placed near the living body. In the case where the monitoring / reporting area is reduced so that the monitor information can be transmitted and received, the information is directly transmitted to the individual patient (or attendant). Usually, the patient (or attendant) will call the nurse as needed. [Refer to the i1 to i3 types to be described later for the device that constitutes a closed circuit.] Of course, it is not necessary to consider the monitoring / reporting area in a limited manner just because of the reduced configuration, and to transmit information directly to the nurse center. It does not matter.

On the other hand, the terminal electrodes provided at at least one position in the conduit are disposed immediately below the infusion reservoir (for example, a drip tube), and the monitor device is provided with a support for the infusion reservoir (for example, a drip tube support). ) Or in a pipeline with an extended monitoring / reporting area so that monitor information can be transmitted and received between the bedside and the nurse center,
Centralized management is possible and can be applied to serious patients. (Refer to the i4 type described later for the device that constitutes a closed circuit)

[0013] In this case, a geared motor may be provided in the pipeline, the drive control may be performed in cooperation with the monitor device, and the infusion operation may be forcibly terminated by pressing the pipeline. (Refer to the i5 type below for devices that constitute a closed circuit)

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a medium monitoring apparatus according to an embodiment of the present invention. Here, i1 type to i7 type (Examples 1 to 7) for medium introduction (infusion); d1, d2 type (Examples 8 and 9) for medium discharge (drainage); and medium exchange [perfusion] Perfusion] is exemplified by the p-type (Example 10). An eleventh embodiment exemplifies constituent means (common) for detecting and outputting information on leakage of a medium in a living body. In addition,
The same reference numerals are given to the components common to the drawings.

(Example 1) i1 type [infusion] FIG. 1 shows a schematic diagram of the device configuration, and FIG. 2 shows an equivalent circuit thereof.

As shown, this device configuration (i1) relates to infusion (eg, infusion) by gravity or pressure. A conduit (1) connected to an infusion storage container (for example, a drip tube) (8) and having a metal needle or a thin tube (11) attached to a tip thereof, and a terminal provided in at least one place of the conduit (1) An electrode (2), one terminal electrode (3) provided on the living body (H) in the vicinity of the needle insertion section or the capillary insertion section (11), and an AC power supply (4)
And a monitor device (5) for extracting an electrical state between the terminal electrodes (2, 3). The terminal devices (2, 3) are connected via the monitor device (5), By applying a voltage, the infusion is used as a conductive path to form a series closed circuit (6) that is capacitively coupled to the infusion and is resistance-connected through the living body.

Here, a monitor device is installed near the patient (living body) to monitor (obtain) needle removal (extubation information) and presence / absence of bubbles (bubble information). In any case, it is possible to monitor and extract the conduction state (presence or absence of conduction) of the circuit (between the terminal electrodes).

FIG. 3 is a block diagram mainly showing the monitor device (5). FIG. 4 is a schematic diagram showing the configuration of a suitable receiving means (50) used in this case. The main part of the monitor device (5) is common to the following embodiments.

(Embodiment 2) i2 type [infusion] FIG. 5 shows a schematic diagram of the device configuration, and FIG. 6 shows an equivalent circuit thereof.

As shown in the figure, in this device configuration (i2), a parallel closed circuit <a, b> (6) is configured, a monitor device is installed near a patient (living body), and Needle omission (extubation information) and presence / absence of air bubbles (air bubble information), and changes in components such as blockage or disconnection of pipes (disconnection information), out of infusion (infusion completion information), and touching the pipeline with respect to closed circuit Monitor (obtain) changes in circuit impedance (tube hold information). Said ~
Are for monitoring and extracting the conduction state (presence / absence of conduction) of the circuit (between the terminal electrodes), and for monitoring and extracting the impedance change.

Although not shown, the monitor device (5) and various means for measuring the behavior of the living body (for example, function measuring means such as an electrocardiograph, a sphygmomanometer, a thermometer, etc.) are linked,
Complex information output may be obtained.

(Embodiment 3) i3 type [infusion] FIG. 7 shows a schematic diagram of the device configuration, and FIG. 8 shows an equivalent circuit thereof.

As shown in the figure, in this device configuration (i3), a parallel closed circuit <a, b, c> (6) is formed, and a monitor device (5) is installed near a patient (living body). For the closed circuit b, needle change (extraction information) and presence / absence of air bubbles (bubble information), for closed circuit b, change in the circuit configuration such as blockage or disconnection of the conduit (disconnection information) and touching the conduit (pipe change) Monitors (obtains information on hold information) and on the closed circuit c.
I do. -And-are circuits (between terminal electrodes)
Monitor-extracts the current-carrying state (presence / absence of conduction), and monitors and extracts the impedance change.

According to each of the above embodiments (i1 to i3 type), monitor information can be transmitted and received in a narrow area at the bedside, and the monitoring / reporting area can be reduced in size. Usually, information is directly transmitted to individual patients (or attendants), and nurse calls are made as necessary.

(Embodiment 4) i4 type [infusion: infusion] FIG. 9 shows a schematic diagram of the device configuration, and FIG. 10 shows an equivalent circuit thereof.

As shown in the figure, in this device configuration (i4), a series closed circuit (6) is configured, a monitor device (5) is installed immediately below the drip tube (8), and needle removal (extubation information) is performed. )
And the presence or absence of bubbles (bubble information) is monitored (obtained). In any case, it is possible to monitor and extract the conduction state (presence or absence of conduction) of the circuit (between the terminal electrodes).

FIG. 11 is a block diagram mainly showing the monitor device (5). According to this, it is possible to extend the configuration of the monitoring / reporting area so that centralized management is possible by transmitting and receiving monitor information between the bedside and the nurse center.

Here, as the transmission / reception means, known communication means using radio waves, ultrasonic waves, infrared rays or the like may be employed.
For example, when using infrared rays, an infrared receiver is placed in a hospital room, an ID signal is given to each room, and a power supply line (100
By performing a double tone for each ID at the nurse center via V), it may be possible to determine in which hospital room the abnormality has occurred. As a matter of course, information can be output via the alarm means. Note that an ID may be assigned to either the infrared receiver or the apparatus main body.

(Embodiment 5) i5 type [infusion: infusion] FIG. 12 is a schematic diagram of the device configuration, and FIG. 13 is a block diagram mainly showing a monitor device.

As shown in the figure, in this device configuration (i5), a geared motor (10) is provided in the pipeline (1), and the drive is controlled in cooperation with the monitor device (5), and the pipeline (1) is controlled.
The infusion operation is forcibly terminated by compressing the channel to block the flow path.

(Example 6) i6 type [infusion] As shown in FIG.
In 6), a plurality of input terminals (not shown) are provided in the monitor device (5), and closed circuits (6, 6) are respectively formed for the plurality of infusion tubes (8, 8). Then, the individual connections are sequentially established by switching the terminals, and the same monitor extraction is performed for the closed circuit (6) during the infusion operation to enable continuous infusion.

(Embodiment 7) i7 type [infusion: infusion] Fig. 15 is a schematic diagram of the device configuration, Fig. 16 is a signal line diagram which is electrically equivalent, and Fig. 17 is a block diagram mainly showing a monitor device. .

As shown in the figure, in this device configuration (i7), a pipe (8) connected to a drip tube (8) and having a metal needle or a thin tube (11) attached to the tip, and a pipe (1) A terminal electrode (2) provided in at least one place of the above, a monitor device (55) connected thereto, and one terminal electrode (3) provided on the living body near the puncture part or the capillary insertion part (11); and A signal line (7) which is provided with a pseudo-random signal transmitter (44) connected to the infusion, and which is inductively coupled or capacitively coupled to the infusion via a living body using the infusion as a conductive path.
Is composed.

Then, the electrical state of the signal line (between the terminal electrodes 2 and 3) (7) during the infusion operation is monitored and extracted, and discrimination is made in relation to the characteristic phenomenon relating to the flow of the infusion and / or the behavior of the living body. And output the information. Here, the monitor information is extubation information, bubble information, disconnection information, tube hold information, and infusion termination information.

Also in this case, a plurality of conduits (signal lines) are provided, the input is switched electronically in the monitor device, and the individual lines are sequentially connected to each other. The target condition can be monitored and extracted. Since the configuration of this device is the same as that of the sixth embodiment (i6 type), illustration is omitted.

(Embodiment 8) d1 type [drainage] FIG. 18 shows a schematic diagram of the apparatus configuration.

As shown in the figure, in this device configuration (d1), the drainage (1)
And a living body (H), a closed circuit (6) is formed. Thus, the medium in this case is cerebrospinal fluid.

(Embodiment 9) d2 type [drainage] FIG. 19 shows a schematic diagram of the apparatus configuration.

As shown in the figure, in this device configuration (d2), a closed circuit (6) is formed between the pipe (1) and the living body (H) for general drainage of urine and other body fluids. I have. Thus, the medium in this case is urine and other body fluids.

The application of the AC voltage, the monitor extraction, and the information output for each of the closed circuits (6) are the same as in the case where a closed circuit is formed in infusion. FIG. 20 shows an equivalent circuit diagram (common to Examples 8 and 9).

(Embodiment 10) P-type [perfusion; perfusion] FIG. 21 is a schematic diagram of the device configuration, and FIG. 22 is an equivalent circuit diagram thereof.

As shown in the figure, in this device configuration (p), a closed circuit (6) is formed between the pipe (1) and the living body (H) for perfusion related to hemodialysis. In this case, since the tubes (1; 1a, 1b) have two systems (IN / OUT of the medium), the connection between the tubes (1; 1a, 1b) and the living body (H) is two places. This is different from each embodiment.

It should be noted that there is no change in the application of the AC voltage, the monitor extraction, and the information output for the closed circuit (6).

(Embodiment 11) Information Output [Circuit Configuration Related to Leakage Information of Medium] FIG. 23 shows a configuration of means for detecting leakage information of a medium in a living body and outputting information. FIG. 24 shows an equivalent circuit diagram thereof.

As shown in the figure, this means configuration is used in each of the above-described embodiments to detect the behavior of the medium when the leak information of the medium in the living body is requested as the monitor information to be output. It constitutes an independent closed circuit (66).

In this case, if the medium leaks out of the duct (blood vessel) in the living body (H), the medium penetrates into the living tissue to cause a change in the electrical resistance of the living body. By doing so, it can be determined.

That is, in the vicinity of the puncture portion or the thin tube insertion portion (11) of the living body (H), the terminal electrodes (31, 32, 33, 34) are separated from each other, and the terminal electrodes (31, 34) at both ends are connected to form an independent closed circuit (66). A voltage is applied and an amplifier (51) is applied to the left and right (position) terminal electrodes (32, 33) adjacent to the needle insertion section or the capillary insertion section (11).
And a monitor device (5) connected to the amplifier (51) to monitor and extract a voltage change between the left and right terminal electrodes (32, 33) adjacent to the needle insertion portion or the capillary insertion portion (11). I am trying to do it.

Here, an AC constant current voltage is applied between the terminal electrodes (31, 34) and the voltage change (ΔV) between the terminal electrodes (32, 33) is applied via the amplifier (51). The sample was extracted and connected to the monitor device (5) included in each of the above embodiments. Therefore, the information output is processed in the same manner as other monitor information.

[0049]

As described above, the present invention has the above-mentioned structure. According to this, a simple and compact apparatus can be constructed, and operability and reliability can be improved.

Moreover, the apparatus is inexpensive and can be expected to spread (contribute) to small-scale medical facilities and hospitalization facilities, so that it is useful in use.

Further, as can be understood from the above embodiments, the present invention has versatility applicable to medium operations related to infusion, drainage, and perfusion.

That is, when the configuration of the present invention is grasped in principle, the continuity of the flow of the medium, which is common to various medium operations on the living body performed through the conduit, is generally monitored (can be performed). It has high industrial value.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of the device configuration of a first embodiment (i1) relating to infusion of an infusion solution.

FIG. 2 is an equivalent circuit diagram of the same.

FIG. 3 is a block diagram mainly showing a monitor device.

FIG. 4 is a schematic diagram of the configuration of a similarly preferable receiving means.

FIG. 5 is a schematic diagram of a device configuration of a second embodiment (i2) relating to infusion of an infusion solution.

FIG. 6 is an equivalent circuit diagram of the same.

FIG. 7 is a schematic diagram of a device configuration of a third embodiment (i3) related to infusion infusion.

FIG. 8 is an equivalent circuit diagram of the same.

FIG. 9 is a schematic diagram of a device configuration of a fourth embodiment (i4) relating to infusion of an infusion solution.

FIG. 10 is an equivalent circuit diagram of the same.

FIG. 11 is a block diagram mainly showing a monitor device.

FIG. 12 is a schematic diagram of a device configuration of a fifth embodiment (i5) relating to infusion of an infusion solution.

FIG. 13 is a block diagram mainly including a monitor device.

FIG. 14 is a schematic diagram of a device configuration of a sixth embodiment (i6) related to infusion infusion.

FIG. 15 is a schematic diagram of a device configuration of a seventh embodiment (i7) relating to infusion of an infusion solution.

FIG. 16 is an electrically equivalent signal line diagram.

FIG. 17 is a block diagram mainly showing a monitor device.

FIG. 18 is a schematic diagram of an apparatus configuration of an eighth embodiment (d1) relating to drainage (drainage of cerebrospinal fluid).

FIG. 19 is a schematic diagram of a device configuration of a ninth embodiment (d2) relating to drainage (urinary conduction).

FIG. 20 is an equivalent circuit diagram (common) of the same.

FIG. 21 is a schematic diagram of an apparatus configuration of a tenth embodiment (p) relating to perfusion (hemodialysis).

FIG. 22 is an equivalent circuit diagram of the same.

FIG. 23 is an explanatory diagram showing an eleventh embodiment (configuration means) relating to detection and information output of leakage information of a medium in a living body.

FIG. 24 is an equivalent circuit diagram thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tube (line) 1a Tube (IN) 1b Tube (OUT) 11 Needle or capillary (puncture part or capillary insertion part; site) 2 Terminal electrode (channel; C coupling) 2a Terminal electrode (channel; C coupling) 2b terminal electrode (conduit; C-coupled) 2c terminal electrode (conduit; C-coupled) 3 terminal electrode (biological; R-connection / C-coupled) 31 terminal electrode (biological; R-connection / C-coupled) 32 terminal electrode (biological; 33 terminal electrode (living body; R connection / C coupling) 34 terminal electrode (living body; R connection / C coupling) 4 AC power supply 41 Constant current source 44 Transmitter (pseudo random signal transmitter) 5 Monitor device 50 Receiving means 51 Amplifier 55 Monitoring device 6 Closed circuit 66 Closed circuit (for detecting leak information of medium) 7 Signal line 8 Drip tube (Infusion storage container) 9 Lead wire 10 Geared motor H Living body i1 Example device (i1 type) i2 Example device (i2 type) i3 Example device (i3 I) Example device (i4 type) i5 Example device (i5 type) i6 Example device (i6 type) i7 Example device (i7 type) d1 Example device (d1 type) d2 Example device (d2 type) p Example device (p type)

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Eri Yonezawa 2-17-38, Miyajimaguchi, Ono-cho, Saiki-gun, Hiroshima Prefecture Take 2960-3, Tojima, Mukohara-cho, Takada-gun, Hiroshima Prefecture F term (reference) 4C066 AA01 AA03 AA07 BB02 CC01 DD01 DD11 FF01 FF05 HH07 QQ14 QQ46 QQ47 QQ53 QQ55 QQ77 QQ82 QQ84 4C077 AA11 AA15 HA01H03H01 H01 H01 H03 HH15 JJ30 KK17 KK19 KK23 KK25 KK27

Claims (10)

[Claims] When introducing a medium into or into a living body through a tube having a metal needle or a thin tube attached to the tip thereof, exchanging a medium for a living body, or removing a medium from a living body, In a medium monitoring method for monitoring the continuity of flow of a medium in a medium path including the tube and detecting an abnormality thereof to promote safe treatment, a terminal electrode is provided on each of a tube and a living body, and a monitor device is provided. And a fluid flowing medium as a conductive path, capacitively coupled with the medium, and a resistive connection or capacitive coupling via a living body to constitute a series or parallel closed circuit. By applying an AC voltage, the electrical state between the terminal electrodes of the closed circuit is monitored and extracted, and discrimination is made in relation to the characteristic phenomena related to the flow of the medium and / or the behavior of the living body to output information. A medium monitoring method, comprising: 2. When a medium is introduced into or into a living body through a tube having a metal needle or a thin tube attached to the tip, a medium for the living body is replaced, or a medium is removed from the living body. In the medium monitoring method, which monitors the continuity of the flow of the medium in the medium path including the tube and detects the abnormality to promote a safe treatment, the terminal is provided on each of the tube and the living body, and the terminal is separately provided. Connect the transmitter and the monitor device, and use the flowing medium as the conductive path,
Capacitively coupled with the medium, and configure a signal line that is resistance-connected or capacitively coupled via a living body, by sending a pseudo tandem signal from one end of the signal line and detecting the signal at the other end, A medium monitoring method, comprising: monitoring and extracting an electrical state between terminal electrodes of the signal line; and determining and outputting the information in association with a characteristic phenomenon relating to the flow of the medium and / or the behavior of a living body. 3. The monitor information output as information includes extubation information relating to needle removal, bubble information relating to the presence or absence of bubbles generated in the infusion, disconnection information relating to blockage or cutting of a conduit, and medium operation relating to liquid shortage. 3. The medium monitoring method according to claim 1, wherein the medium monitoring information is end information or tube hold information relating to a change in impedance between terminal electrodes due to a change in a component such as touching a pipe. 4. The monitor information output as information is leak information of a medium in a living body, and terminal electrodes are separated from each other at least in two places on the left and right sides of the site in the vicinity of a puncture part or a thin tube insertion part. It arranges and forms an independent closed circuit by connecting the terminal electrodes at both ends, applies a constant current voltage to the circuit, and connects an amplifier to the left and right terminal electrodes adjacent to the needle insertion portion or the capillary insertion portion. 3. The medium monitoring method according to claim 1, wherein the monitor device is connected to the amplifier to monitor and extract a voltage change between left and right terminal electrodes adjacent to the needle insertion portion or the thin tube insertion portion. 5. When a medium is introduced into or into a living body through a tube having a metal needle or a thin tube attached to the tip, a medium for the living body is replaced, or a medium is removed from the living body. While monitoring the continuity of the flow of the medium in the medium path including the tube, in a medium monitoring device that detects the abnormality and promotes a safe treatment, a metal needle or a thin tube is attached to the tip. A tube connected to a living body, a terminal electrode provided in at least one place of the tube, one or a plurality of terminal electrodes provided in the vicinity of a puncture portion or a capillary insertion portion of the living body, an AC power supply, and a monitor device,
A flowing medium is used as a conductive path to form a series or parallel closed circuit that is capacitively coupled with the medium and that is resistance-connected or capacitively coupled through a living body, and applies an AC voltage to the closed circuit. A medium that monitors and extracts the electrical state between the terminal electrodes of the closed circuit, and discriminates the information in relation to a characteristic phenomenon related to the flow of the medium and / or the behavior of a living body, and outputs information. Monitoring device. 6. The monitor device according to claim 5, wherein a plurality of input terminals are provided to form a plurality of closed circuits, and the inputs are electronically switched so as to be sequentially connected to the closed circuits during operation of the medium. Media monitoring device. 7. When a medium is introduced into or into a living body through a tube having a metal needle or a thin tube attached to the tip, a medium for the living body is replaced, or a medium is removed from the living body. While monitoring the continuity of the flow of the medium in the medium path including the tube, in a medium monitoring device that detects the abnormality and promotes a safe treatment, a metal needle or a thin tube is attached to the tip. A tube connected to a living body, a terminal electrode provided in at least one place of the tube, and a monitoring device connected thereto, and one or more terminal electrodes provided near a needle insertion portion or a thin tube insertion portion of the living body, and It comprises a transmitter connected thereto, capacitively couples with a flowing medium as a conductive path, and forms a signal line for resistive connection or capacitive coupling via a living body. one By sending a pseudo-random signal from one end and detecting the signal at the other end, the electrical state between the terminal electrodes of the signal line can be monitored and extracted, and can be related to the characteristic phenomena related to the flow of the medium and / or the behavior of the living body. A medium monitoring apparatus characterized in that the medium monitoring apparatus additionally outputs the information. 8. The monitor device according to claim 7, wherein a plurality of input terminals are provided on the monitor device to constitute a plurality of signal lines, and the input is electronically switched to sequentially connect the signal lines during operation of the medium. Media monitoring device. 9. Monitor information to be output includes extubation information relating to needle dropout, bubble information relating to the presence or absence of bubbles generated in infusion, disconnection information relating to blockage or cutting of a pipeline, and medium operation relating to liquid exhaustion. 9. The medium monitoring device according to claim 5, wherein the medium monitoring device is end information or tube hold information related to a change in impedance between terminal electrodes due to a change in a component such as touching a pipe. 10. The monitor information output as information is leak information of a medium in a living body, and terminal electrodes are separated from each other at least in two places on the right and left sides of the site near the puncture unit or the capillary tube insertion unit. It arranges and forms an independent closed circuit by connecting the terminal electrodes at both ends, applies a constant current voltage to the circuit, and connects an amplifier to the left and right terminal electrodes adjacent to the needle insertion portion or the capillary insertion portion. The medium monitor according to any one of claims 5 to 8, wherein the amplifier is connected to the monitor, and monitors and extracts a voltage change between left and right terminal electrodes adjacent to the needle insertion portion or the thin tube insertion portion. apparatus.