JP3723847B2 - Infusion monitoring device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an infusion monitoring device for detecting an abnormality during infusion.
[0002]
[Prior art]
Various devices have been proposed as devices that monitor the state of infusion in a medical institution such as a hospital and issue an alarm in the event of an abnormality. For example, the device disclosed in Japanese Patent Application Laid-Open No. 2002-11095 (Patent Document 1) detects a dropping speed of a chemical solution dropped at a speed corresponding to an infusion speed inside a joint body, and an abnormality is caused based on the dropping speed of the chemical liquid. Judgment is being made. According to this configuration, it is possible to perform detailed abnormality detection such as subcutaneous leakage of the drug solution (subcutaneous injection state) and deviation from the main route (detachment of the injection needle).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-11095
[Problems to be solved by the invention]
In this conventional apparatus, if the dropping of the drug solution cannot be detected within a predetermined time, it is determined that there is an abnormality. There has been a problem that it is impossible to determine in detail whether or not there is no dripping of the chemical liquid by the tube being pressed and the chemical liquid stagnating.
[0005]
This invention is made | formed in view of the said subject, and it aims at providing the drip monitoring apparatus which can detect the abnormal condition in drip in more detail.
[0006]
[Means for Solving the Problems]
In order to achieve such an object, the drip monitoring apparatus according to the first aspect of the present invention monitors the state of drip when performing drip via a relay means that drips a chemical solution at a rate corresponding to the infusion rate. An apparatus comprising: a drop detecting means for detecting the passage of the chemical liquid dropped in the relay means; a liquid level detecting means for detecting the presence or absence of a chemical liquid upstream from the relay means; a detection result of the drop detecting means and the liquid A determination unit that performs drip abnormality determination based on the detection result of the surface detection unit, and the infusion is performed based on whether or not the liquid level detection unit detects the chemical liquid when the drip detection unit does not detect the passage of the chemical liquid. a judging means for performing the abnormality determination, the output means for outputting a signal based on the determination result of the determining means comprises a detection of the chemical by the liquid level detecting means when said dropping detecting means does not detect the passage of the chemical Characterized in that distinguishes an abnormal state of the infusion in response to the presence or absence of.
[0007]
An infusion monitoring apparatus according to a second aspect of the present invention is the apparatus according to the first aspect of the present invention, wherein the determination means detects the chemical solution by the liquid level detection means, and the drip detection means is within a predetermined time. When the passage of the chemical liquid is not detected, it is determined that the chemical liquid is stagnant, and the output means outputs a signal indicating the chemical liquid stagnation.
[0008]
An infusion monitoring apparatus according to a third aspect of the present invention is the apparatus according to the first aspect of the present invention, wherein the determination means is configured such that the liquid level detection means does not detect a chemical solution and the drip detection means is in a predetermined time. If the passage of the chemical solution is not detected, it is determined that the chemical solution has run out, and the output means outputs a signal indicating that the chemical solution has run out.
[0009]
An infusion monitoring device according to a fourth aspect of the present invention is the device according to the third aspect of the present invention, further comprising stop means capable of stopping the outflow of the chemical solution downstream from the relay means, wherein the output means When the determination means determines that the chemical liquid is out, the stop means is driven to stop the outflow of the chemical liquid downstream from the relay means.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
A preferred embodiment of the present invention will be described below. FIG. 1 is a diagram illustrating a usage state of an infusion monitoring device according to an embodiment of the present invention. The infusion device 1 includes a chemical liquid bottle 2 containing a chemical liquid, a joint part 3, a catheter tube 5 having one end connected to the lower surface of the chemical liquid bottle 2 and the other end connected to the upper surface of the joint part 3, A catheter tube 4 having one end connected to the lower surface and an injection needle (not shown) at the other end.
[0011]
The joint part 3 as the relay means is configured to be airtight, and negative pressure is generated inside when the drug solution is instilled through the injection needle punctured by the patient, and the drug solution inside the drug solution bottle 2 corresponds to the infusion rate. A drop of liquid is dropped inside at a speed to form a liquid pool. Air bubbles in the catheter tube 4 are eliminated by relaying the chemical solution by the joint portion 3.
[0012]
The drip monitoring device 10 is attached to the joint portion 3 and detects a passage of a chemical solution dripping inside the joint portion 3, and a liquid level that is attached to the catheter tube 5 and detects the presence or absence of the chemical solution in the catheter tube 5. A detection unit 12, a stopper 14 capable of stopping the outflow of the chemical solution from the injection needle, and a main body unit 30 are provided.
[0013]
The drop detection unit 20 includes a light-emitting element 20a such as an LED and a light-receiving element 20b such as a CCD that are arranged to face each other, and an electric circuit that controls these to convert the intermittent light accompanying the passage of drip liquid into a pulse signal. And is connected to the main unit 30 with a sensor cable 21.
[0014]
Similarly, the liquid level detection unit 12 converts a light-emitting element 12a such as an LED and a light-receiving element 12b such as a CCD, which are arranged to face each other, and the light intermittently associated with the passage of the drip liquid into a pulse signal by controlling them. And is connected to the main unit 30 with a sensor cable 21.
[0015]
As shown in FIG. 2, the stopper 14 includes a roller 15 and a wall surface 16. As shown in FIG. 2A, the roller 15 is eccentrically attached to a rotation shaft 39 of a motor 38 provided in the main unit 30. When the stopper 14 is operated, the roller 15 squeezes the catheter tube 4 between the wall surface 16 by driving the motor 38 as shown in FIG. Thereby, the outflow of the chemical solution from the injection needle can be stopped. As described above, the stopper 14 and the motor 38 implement the stopping means of the present invention.
[0016]
As shown in FIG. 3, the main unit 30 includes a drip monitoring unit 31, a liquid level monitoring unit 33, a control unit 32, an operation unit 34, a memory 35, a communication control unit 36, a display unit 37, And a motor 38.
[0017]
The drop monitoring unit 31 is an interface part for taking the signal transmitted from the drop detection unit 20 into the control unit 32. Similarly, the liquid level monitoring unit 33 is an interface part for taking the signal transmitted from the liquid level detection unit 12 into the control unit 32.
[0018]
The control unit 32 performs drip abnormality determination based on the detection result of the drip detection unit 20 and the detection result of the liquid level detection unit 12, and outputs a signal based on the determination result to the communication control unit 36 and the display unit 37. The control unit 32 includes a microprocessor (MPU) and a ROM that stores operation programs, various setting values, and the like.
[0019]
The operation unit 34 includes switches SW1, SW2, and SW3 including a slide switch or a push switch (not shown). The switch SW1 is used as a power switch, the switch SW2 is used as a start switch, and the switch SW3 is used as a stop switch. The operation unit 34 further includes a switch SW4 for setting a unique number for identifying the drip monitoring apparatus 10 and a switch SW5 for releasing the stopper 14.
[0020]
The memory 35 is configured to include a RAM that is used for the operation state by the operation unit 34, the storage of a detection value of a dropping speed, which will be described later, and various operations by the MPU of the control unit 32. The communication control unit 36 is an interface part for outputting various wireless signals to the outside.
[0021]
The display unit 37 receives a signal from the control unit 32 and displays information on the determination result of the drip abnormality determination. The motor 38 is driven by a signal from the control unit 32 when a determination result, which will be described later, is obtained, and the motor 38 operates the stopper 14 to stop the outflow of the drug solution from the injection needle.
[0022]
The calling system 60 selects a reception sensor 61 that receives a radio signal output from the communication control unit 36, and a radio caller 70 that is a transmission destination possessed by the nurse in accordance with a detection signal of the reception sensor 61, and selects a radio signal. And a communication control call transmitter 62 for outputting the following. The wireless paging device 70 includes a display window for displaying a patient's room number, bed number, infusion abnormal state, and the like.
[0023]
Next, the operation of the drip monitoring apparatus 10 of the present embodiment configured as described above will be described. The processes shown in the following flowcharts are executed by the control unit 32.
[0024]
In the initialization operation routine shown in FIG. 4, when the start switch is pushed, the process proceeds to step (hereinafter referred to as S) 1 to perform level tuning of the liquid level detection unit 12. Next, it progresses to S2 and reading of the dripping detection result of the dripping detection part 20 is performed. Next, in S3, it is determined whether or not bubbles are generated in the catheter tube 5 based on the liquid level detection result of the liquid level detection unit 12. If the determination result in S3 is YES, the process proceeds to S4, where a signal indicating bubble generation is output to the display unit 37, and information on liquid level abnormality (bubble generation) is displayed. Thereafter, if the bubbles are removed, the process proceeds to S5. On the other hand, if the determination result in S3 is NO, the process proceeds to S5.
[0025]
In S5, it is determined whether or not a predetermined time, for example, 30 seconds has elapsed since the drop detection result of the drop detection unit 20 was read. However, here, instead of determining the passage of time, it may be determined whether or not a predetermined number of drops, for example, 6 drops, has been detected after the drop detection result of the drop detection unit 20 has been read. . If the determination result in S5 is NO, the process returns to S2. On the other hand, if the determination result in S5 is YES, the process proceeds to S6.
[0026]
In S <b> 6, the reference value of the dropping speed at the joint portion 3 is measured and stored in the memory 35. The reference value here may be calculated based on the average value of the drop intervals within a predetermined time or may be calculated based on the time required to detect a predetermined number of drops. Next, the procedure proceeds to the drip monitoring routine shown in FIG.
[0027]
In the drip monitoring routine, first, the dropping speed at the joint portion 3 is measured in S101. The dropping speed here may be calculated based on the average value of the dropping intervals within a predetermined time, or may be calculated based on the time required to detect a predetermined number of drops, as in S6. . Next, it progresses to S102 and it is determined whether the dripping speed measured by S101 is normal. As an example of the determination method here, when the measured dropping rate is 10% or more faster than the reference value of the dropping rate calculated in S6, or when the measured dropping rate is 20% or more slower than the reference value of the dropping rate. The determination result in S102 is NO, that is, it is determined that the dropping speed is abnormal. If the determination result in S102 is YES, the process returns to S101 and repeats the measurement of the dropping speed. On the other hand, if the determination result in S102 is NO, the process proceeds to S103.
[0028]
In S103, it is determined whether or not the dropping in the joint portion 3 is stopped. As an example of the determination method here, if dripping is not detected within a predetermined time, the determination result in S103 is YES, that is, it is determined that dripping has stopped. If the determination result in S103 is NO, the process proceeds to a first abnormality monitoring routine described later. On the other hand, if the determination result in S103 is YES, the process proceeds to S104.
[0029]
In S104, the presence or absence of the liquid level in the catheter tube 5 is determined from the liquid level detection result of the liquid level detection unit 12. If it is determined that there is a liquid level, the process proceeds to a fourth abnormality monitoring routine described later. On the other hand, when it is determined that there is no liquid level, dropping is stopped at the joint portion 3 and the liquid level of the catheter tube 5 is not present. In this case, it is determined that the chemical has run out (normal end), and the process proceeds to S105.
[0030]
In S105, the motor 38 is driven to operate the stopper 14, thereby preventing the chemical solution remaining in the joint portion 3 from flowing out of the injection needle. Next, the process proceeds to S106, and a signal indicating that the chemical has run out (normal end) is output to the communication control unit 36 and the display unit 37, and this routine ends.
[0031]
In the first abnormality monitoring routine shown in FIG. 6, first, the process proceeds to S201, and it is determined whether or not the dropping speed measured in S101 is 10% or more faster than the reference value calculated in S6. When the determination result in S201 is NO, the process proceeds to a second abnormality monitoring routine described later. On the other hand, if the determination result in S201 is YES, the process proceeds to S202.
[0032]
In S202, a timer for a predetermined time (for example, 10 seconds) is set. Next, the process proceeds to S203, and the dropping speed is measured by the same method as in S101. Next, in S204, it is determined whether or not the dropping speed measured in S203 is 10% or more faster than the reference value calculated in S6. If the determination result in S204 is NO, the process returns to the drip monitoring routine. On the other hand, if the determination result in S204 is YES, the process proceeds to S205.
[0033]
In S205, it is determined whether or not a predetermined time (for example, 10 seconds) has elapsed since the timer was set. If the determination result in S205 is NO, the process returns to S203. On the other hand, when the determination result in S205 is YES, the dropping speed at the joint portion 3 is 10% or more faster than the reference value calculated in S6 for a predetermined time (for example, 10 seconds). In this case, it is determined that the main route is off (the needle is missing), and the process proceeds to S206.
[0034]
In S206, the motor 38 is driven to actuate the stopper 14 to prevent the drug solution remaining in the joint portion 3 from flowing out of the injection needle. Next, the process proceeds to S207, where a signal indicating that the main route is off (injection of the injection needle) is output to the communication control unit 36 and the display unit 37, and this routine ends.
[0035]
In the second abnormality monitoring routine shown in FIG. 7, the process first proceeds to S301, where it is determined whether or not the dropping speed measured in S101 is 50% or more slower than the reference value calculated in S6. If the determination result in S301 is YES, the process proceeds to a third abnormality monitoring routine described later. On the other hand, if the determination result in S301 is NO, the process proceeds to S302.
[0036]
In S302, the dropping speed is measured by the same method as in S101, and the change in dropping speed is measured by examining the difference from the previously measured dropping speed. Next, in S303, it is determined whether or not there is a subcutaneous leak (subcutaneous injection state). As an example of the determination method here, if a measurement result that slows the dropping speed is obtained continuously a predetermined number of times, the determination result in S303 is YES, that is, it is determined as subcutaneous leakage (subcutaneous injection state). If the determination result in S303 is NO, the process returns to the drip monitoring routine. On the other hand, if the determination result in S303 is YES, the process proceeds to S304.
[0037]
In S304, a signal indicating subcutaneous leakage (subcutaneous injection state) is output to the communication control unit 36 and the display unit 37, and the flow returns to the drip monitoring routine.
[0038]
In the third abnormality monitoring routine shown in FIG. 8, first, the process proceeds to S401, the dropping speed is measured, and whether or not a state that is 50% or more slower than the reference value calculated in S6 continues for a predetermined time (for example, 3 minutes). Is determined. If the determination result in S401 is NO, the process returns to the drip monitoring routine. On the other hand, if the determination result in S401 is YES, it is determined that the patient operation is abnormal, and the process proceeds to S402. Here, the patient motion abnormality indicates a state in which the dropping speed is slowed because the catheter tube 4 is twisted or bent due to the temporary motion of the patient.
[0039]
In S402, a signal indicating abnormal patient motion is output to the communication control unit 36 and the display unit 37, and the process returns to the drip monitoring routine.
[0040]
In the fourth abnormality monitoring routine shown in FIG. 9, first, the process proceeds to S501, where it is determined whether or not a state in which no dripping is detected continues for a predetermined time (eg, 3 minutes). If the determination result in S501 is NO, the process returns to the drip monitoring routine. On the other hand, when the determination result in S501 is YES, dropping is stopped at the joint portion 3 and the liquid level of the catheter tube 5 is present. In this case, it is determined that the chemical solution is stagnant and the process proceeds to S502.
[0041]
In S502, a signal indicating the stagnation of the chemical solution is output to the communication control unit 36 and the display unit 37, and the flow returns to the drip monitoring routine.
[0042]
The display unit 37 displays information about each determination result by a signal indicating each determination result. Then, the communication control unit 36 transmits a signal indicating each determination result to the paging system 60, and the calling system 60 transmits a signal indicating each determination result to the radio paging device 70. Information of each determination result is displayed in the display window. Thereby, the nurse can take an appropriate measure according to each determination result.
[0043]
It should be noted that a buzzer may be provided in the main unit 30, and information on each determination result by the control unit 32 may be notified by the buzzer.
[0044]
In the drip monitoring apparatus 10 of the present embodiment configured as described above, drip abnormality determination is performed based on the detection result of the drip detection unit 20 and the detection result of the liquid level detection unit 12. For example, when dripping is stopped at the joint portion 3 and the liquid level of the catheter tube 5 is present, it is determined that the chemical solution is stagnant. And when dripping has stopped in the joint part 3 and there is no liquid level of the catheter tube 5, it determines with chemical | medical solution running out. Thus, since the state of the chemical solution stagnation and the state of the chemical solution running out can be distinguished, the abnormal state during the drip can be detected in more detail. In addition, by determining that the chemical solution has run out from the detection results of both the drip detection unit 20 and the liquid level detection unit 12, it is possible to prevent a malfunction of the chemical solution running out due to the occurrence of bubbles in the catheter tube 5.
[0045]
Furthermore, in this embodiment, when it is determined that the chemical solution has run out, the stopper 14 is operated to stop the outflow of the chemical solution from the injection needle. Therefore, in the case of running out of the chemical solution, the chemical solution can be exchanged without generating bubbles in the catheter tube 4. Furthermore, even when it is determined that the main route is off, the stopper 14 is operated to prevent the chemical liquid from leaking due to the main route off.
[0046]
In the above embodiment, the optical element is used as the means for detecting the passage of the dropped chemical liquid and the means for detecting the presence or absence of the chemical liquid. However, as the dropping detection means and the liquid level detecting means in the present invention, the dropped chemical liquid is used. As long as it is possible to detect the passage of the liquid and the presence / absence of the chemical solution, not only optical means but also vibration / electric resistance and other means may be used.
[0047]
【The invention's effect】
As described above, according to the present invention, it is possible to detect an abnormal state in the drip in more detail by performing drip abnormality determination based on the detection result of the drip detection unit and the detection result of the liquid level detection unit.
[Brief description of the drawings]
FIG. 1 is a front view showing a usage state of an infusion monitoring device according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating the configuration and operation of a stopper.
FIG. 3 is a functional block diagram showing an infusion monitoring device.
FIG. 4 is a flowchart showing initialization operation processing.
FIG. 5 is a flowchart showing drip monitoring processing.
FIG. 6 is a flowchart showing a first abnormality monitoring process.
FIG. 7 is a flowchart showing a second abnormality monitoring process.
FIG. 8 is a flowchart showing a third abnormality monitoring process.
FIG. 9 is a flowchart showing a fourth abnormality monitoring process.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Infusion apparatus, 2 chemical | medical solution bottle, 3 joint part, 4,5 catheter tube, 10 drip monitoring apparatus, 12 liquid level detection part, 14 stopper, 20 drip detection part, 30 main body unit, 31 drip monitoring part, 32 control part, 33 Liquid level monitoring unit, 34 operation unit, 35 memory, 36 communication control unit, 37 display unit, 38 motor, 60 paging system, 61 reception sensor, 62 communication control paging transmitter, 70 wireless paging unit.

Claims (4)

A device for monitoring the state of infusion when performing infusion via a relay means for dripping a drug solution at a speed corresponding to the infusion speed,
Drop detection means for detecting the passage of the chemical liquid dropped in the relay means;
Liquid level detection means for detecting the presence or absence of a chemical solution upstream from the relay means;
A determination unit that determines drip abnormality based on the detection result of the drip detection unit and the detection result of the liquid level detection unit, and the liquid level detection unit when the drip detection unit does not detect the passage of a chemical solution Determination means for determining abnormality of infusion based on the presence or absence of detection of the chemical by
Output means for outputting a signal based on the determination result of the determination means;
An infusion monitoring device for distinguishing an abnormal state of infusion according to whether or not the liquid level detection means detects the chemical liquid when the drop detection means does not detect the passage of the chemical liquid . The infusion monitoring device according to claim 1,
When the liquid level detection means detects the chemical liquid and the drip detection means does not detect the passage of the chemical liquid within a predetermined time, the determination means determines that the chemical liquid is stagnant,
The drip monitoring apparatus, wherein the output means outputs a signal indicating a stagnation of a chemical solution. The infusion monitoring device according to claim 1,
If the liquid level detection means does not detect the chemical liquid and the drip detection means does not detect the passage of the chemical liquid within a predetermined time, the determination means determines that the chemical liquid has run out,
The instillation monitoring apparatus characterized in that the output means outputs a signal indicating that the chemical is out. An infusion monitoring device according to claim 3,
Further comprising stop means capable of stopping the outflow of the chemical solution downstream from the relay means,
The drip monitoring device, wherein the output means drives the stop means to stop the outflow of the chemical liquid downstream from the relay means when the determination means determines that the chemical liquid has run out.

Images