JPH06205829A - Transfusion device and its control method - Google Patents

Abstract

PURPOSE: To make it easier to operate transfusion system after occlusion develops by providing it with an infusion operation unit in a tube jointed to an infusion bag to send the liquid inside downstream and a downstream occlusion detector to detect occlusion of the tube in the downstream of the operation unit. CONSTITUTION: The development of occlusion stops an infusion operation unit. Before and after the stop, the system is detected to see whether any human intervention, say, the key input other than preset starting key (S3, S8) was made or not. The occlusion is released in case the preset key was input (S11), and the infusion operation unit is restarted only when the starting key is input (S12). While the occlusion is released in case no preset key was input before or after the infusion operation unit stopped, or, restarted in case the starting key was input.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an infusion device used for drip in a medical field and a control method thereof. More specifically, the present invention relates to an infusion device and a control method thereof in which an infusion actuation unit is provided in the middle of a tube connecting an infusion bag and a human body, and when the tube is blocked, the infusion actuation unit is temporarily stopped and then restarted.

[0002]

2. Description of the Related Art Conventionally, an infusion device of this type is shown in FIG.
As shown in FIG. 5, an infusion solution operating section 217 for sending the liquid in the tube 91 to the downstream side is provided in the middle of the tube 91 that connects the infusion solution bag 90 and the human body 92.
It is known that a pressure increase sensor (downstream blockage detector) 218 is provided on the downstream side of 7. The infusion actuation unit 217 is driven by the control unit (CPU) 201 via the interface I / O (note that the interface I / O is omitted in the following description for simplicity). The tube 91 has elasticity, and when the inner pressure rises, the tube 91 expands to increase the outer diameter. The sensor 218 detects a change in the outer diameter of the tube 91, and as shown in FIG.
An output corresponding to the change in outer diameter is generated. In FIG. 6, R0,
R1 indicates the tube outer diameter in the normal state and the downstream blockage occurrence state, respectively, and N0 and N1 indicate the sensor output in that state.

This infusion device is controlled according to the flow chart shown in FIG. That is, during operation, the CPU 201 shown in FIG. 7 drives the infusion actuation unit 217 to start liquid delivery (step S101). Further, the CPU 201 samples the output of the sensor 218, that is, causes the RAM (random access memory) 202 to read the sensor output once (step S102). Next, the sampled sensor output D and the downstream blockage reference value N1 (stored in the ROM (read only memory) 203) are compared in size (step S103), and the sensor output D is smaller than the reference value N1. If so, continue sampling. On the other hand, when D ≧ N1, the operation of the infusion actuating unit is stopped and the alarm / warning indicator 4 is displayed to indicate that downstream blockage has occurred (a buzzer sound is also generated). The CPU 201 continues sampling (step S105), and when the sensor output D becomes the normal reference value N0 or less (step S105).
106), and automatically restarts the infusion operation unit 217 (step S107). This prevents the operator (nurse, etc.) from being bothered by a temporary cause such as a patient rolling over.

[0004]

By the way, in the state where the infusion operation portion 217 is once stopped due to the occurrence of the downstream blockage,
When the operator who hears the alarm buzzer sounds and presses the mute key or the like, the sensor output D may fall below the normal reference value N0 for some reason. For example, the blocked state may be temporarily released by the patient rolling over. In this case, in the above-mentioned conventional infusion device, the infusion actuation unit 2 can be operated even while the operator is inspecting the state of the tube.
17 automatically restarts. For this reason, the operator must stop the operation once by key input, eliminate the cause of the abnormality, and then press the start key again, which is a troublesome operation. Also, when the operator sets (changes) the infusion flow rate (speed), planned infusion volume, etc. by key input during the liquid transfer operation, similar to the above case, the downstream blockage temporarily occurs and is released immediately. It may be done. In this case, the operator stops the operation once by key input, presses the setting key (meaning keys other than the above-mentioned start key throughout the specification) to reset the setting, and then presses the start key again. I have to operate. As described above, the conventional infusion device has a problem that the operation after the occurrence of blockage is troublesome.

Therefore, an object of the present invention is to provide an infusion device and a control method thereof that can simplify the operation after the occurrence of blockage.

[0006]

In order to achieve the above object, the infusion device of the present invention has an infusion actuating portion for sending the liquid in the tube downstream in the middle of the tube connected to the infusion bag, and the infusion actuation described above. An infusion device having a downstream blockage detector for detecting the blockage of the tube on the downstream side of the section, and when the downstream blockage detector detects blockage, the control section stops the operation of the infusion operation section. The control unit determines whether or not there is a setting key input determination unit that detects whether or not there is a setting key input when the infusion actuation unit is stopped due to the occurrence of the blockage. The starting key input determining means and the setting key input determining means determine that there is the setting key input,
Only when the downstream blockage detector outputs a signal indicating that the blockage has been released, and the start key input determination means determines that the start key input is present, the infusion actuation unit is reactivated. The first restart command means for starting and the setting key input determining means determine that there is no setting key input, and the downstream blockage detector outputs a signal indicating that the blockage has been released or starts up. It is characterized in that it has a second restart command means for restarting the infusion operation part when the key input judging means judges that there is the start key input.

Further, the method for controlling an infusion device according to the present invention is
Inside the above tube in the middle of the tube leading to the infusion bag
In addition to having an infusion operation part that sends the liquid of
It is detected that the tube is blocked on the downstream side of the infusion unit.
A method for controlling an infusion device having a downstream blockage detector for emitting
Therefore, when the downstream blockage detector detects blockage, the
Stop the liquid working part and set it before and after stopping the above liquid working part
Detects whether there is a key input
If there is, then the downstream blockage detector is unblocked
Output a signal that indicates that there is a start key input
Only when the above infusion operation part is restarted,
If there is no key input, the downstream blockage detector will
Outputs a signal indicating that it has been released, or starts
Restarting the infusion operation part when there is a key input
Is characterized by.

[0008]

[Operation] The infusion actuation unit stops due to the occurrence of blockage. The setting key input determination means determines whether or not there is a setting key input before and after the infusion actuation unit is stopped. When there is a setting key input, the infusion actuation unit outputs a signal indicating that the downstream blockage detector has released the blockage by the first restart command unit, and the start key input determination unit starts up. It is restarted only when it is determined that there is a key input. That is, even if the blockage is released, it is not automatically restarted, but only manually restarted. Therefore, even if the operator does not bother to stop the infusion actuation unit by key input, the operator can remove the cause of the abnormality causing the blockage, infusion rate (speed) or The planned amount can be set.
After that, the engine is restarted by pressing the start key. in this way,
According to the present invention, the trouble of temporarily stopping the infusion actuation unit is omitted, and the operation after the occurrence of downstream blockage is simplified.

On the other hand, when the setting key input is not made, the infusion actuation section outputs a signal indicating that the downstream blockage detector has released the blockage by the second restart command means, or When the start key input determination means determines that there is a start key input, it is restarted. That is, automatic restart and manual restart are possible. In other words, after a temporary obstruction due to the patient rolling over,
If released immediately, the infusion actuation section will automatically restart. Therefore, as in the conventional case, the operator is not annoyed one by one.

[0010]

EXAMPLES The infusion device of the present invention and its control method will be described in detail below with reference to examples.

FIG. 2 is a front view of an infusion pump apparatus (hereinafter simply referred to as “apparatus”) according to an embodiment of the present invention, and FIG. 3 shows an infusion operation section 17 with a side door opened. As a matter of fact, FIG. 4 shows each of the devices viewed from the rear. Further, FIG. 5 shows an electric system of this device.

As shown in FIG. 2, a front key panel 50 is provided.
Is provided with various elements such as a power switch 1.
The power switch 1 is a power circuit for the entire device (see FIG.
The power of the entire device is turned on when pressed once and turned off when pressed again. When the power is turned on, a self-test (checking the operation of each part described later) is automatically performed temporarily. While this device is connected to the AC power supply, the built-in battery is charged regardless of whether the power switch 1 is turned on or off. The alarm / warning indicator 2 displays a signal detected by a detector, which will be described later, as a CP.
Via U (indicated at 101 in FIG. 5), which displays all alarm and warning messages. The programming indicator 3 displays all program information relating to the infusion such as the infusion flow rate, the planned infusion volume, and the accumulated infusion volume which have been input for the main infusion and the auxiliary infusion. The infusion flow rate is
ml / hr, planned infusion volume, and cumulative infusion volume are displayed in units of ml. The main infusion key 4 is used to input the infusion flow rate and the planned infusion amount (by the keys 4a and 4b) and to activate the infusion actuation unit 17 when performing only one infusion (main infusion).
Used for (via start key 4c). Numeric key 5
Used to enter all numerical data for infusion. The clear key 6 is pressed when an incorrect numerical value is entered with the numerical key 5. When pressed, the display becomes 0, and the operator can input the numerical value again. The stop key 7 is pressed to stop the infusion. After the liquid transfusing section 17 is stopped, when no operation is performed on the liquid transfusing section 17 for 2 minutes, a warning buzzer sounds. When the buzzer stop key 8 is pressed, the alarm / warning sound is paused for 2 minutes. However, even if this key 8 is pressed, the content displayed on the alarm / warning indicator 2 does not change. The auxiliary infusion key 9 is used to input the infusion flow rate and the planned infusion amount (by the keys 9a and 9b) and to start the infusion actuation unit 17 (start key 9 when the auxiliary infusion is delivered).
c)). The operation lamp 10 includes an alarm lamp 10a, an infusion lamp 10b and a warning lamp 10c. The alarm lamp 10a is composed of a red light emitting diode and blinks during the alarm mode to immediately notify that appropriate action is required. The infusion lamp 10b is composed of a green light emitting diode, and is constantly lit during infusion, so that the infusion unit 1
When 7 stops, it goes out. Also, the warning lamp 10c
Consists of a yellow light emitting diode, which lights up during warning mode to signal that appropriate action is required. If the above warning lamp 10a or warning lamp 10c blinks, an alarm /
The cause is displayed on the warning display 2. Reset key 1
When 1 is pressed while the infusion operation unit 17 is stopped, the infusion accumulated amount (the sum of the main infusion and the auxiliary infusion) is reset to 0. When the cumulative infusion amount key 12 is pressed, the cumulative infusion amount (the sum of the main infusion and the supplementary infusion) is displayed, and thereafter, the infusion flow rate and the planned infusion amount registered for the main infusion and the supplemental infusion are displayed. When the back light key 13 is pressed once while the device is operating on AC power, the back lighting of the alarm / warning indicator 2 and the programming indicator 3 is turned on. When pressed again, the backlight is turned off. When the device is operating on batteries, the backlight is on only while the key 13 is pressed. The door handle 14 is used to open and close the door 51. When opening the door 51, handle 1
Raise the lower part of 4 to the front and pull the door. When closing the door 51, the reverse operation is performed. Charging lamp 1
Reference numeral 5 represents a green light emitting diode, which is constantly lit while the device is connected to an AC power source, indicating that the built-in battery is being charged.

As shown in FIG. 3, an infusion actuating portion 17 is provided in the door 51 (an infusion tube is set in the door 51). The liquid transfusing unit 17 has a mechanism for pressing the liquid transfusing tube in a linear peristaltic manner by the operation of the motor 33 shown in FIG. The motor 33 is driven via the motor drive circuit 32 based on the signal from the CPU 101. The rotation angle of the motor 33 (corresponding to the liquid feed amount) is detected by the motor rotation detection circuit 34. The CPU 101 controls the rotation of the motor 33 based on the output of the motor drive circuit 32 received via the A / D converter 35 and the output of the motor detection circuit 34.

Further, as shown in FIG. 3, elements are provided on the upstream side and the downstream side of the infusion actuating portion 17, respectively. The pressure drop sensor (upstream blockage detector) 16 is a chemical solution bottle.
A pressure drop state due to an abnormality (for example, clogging of a chemical solution filter) between the (transfusion bag) and the transfusion operation unit 17 is detected. The pressure increase sensor (downstream blockage detector) 18 detects a pressure increase state due to an abnormality (for example, blockage) between the infusion operation unit 17 and the patient. The sensor 18 only needs to be able to convert a change in the outer diameter of the infusion tube into any change in resistance value, current value, voltage value, oscillation frequency, etc. For example, a semiconductor sensor, a coil with a core, a force sensor, a strain gauge. Etc. can be used. A bubble sensor (bubble detector) 19 detects whether or not bubbles exceeding a specified amount are present in the infusion tube. The safety clamp 20 automatically closes the set infusion tube when the door 51 is opened. This prevents the natural flow of the infusion solution.

Further, as shown in FIG. 4, various elements are also provided on the rear surface. The power cord holder 21 is used to wind the power cord. The panel lock switch 22 is a switch for turning off various keys and a power switch, and can be set so that the device is not operated by anyone other than a doctor or a nurse. The fuse holder 23 contains a designated time-lag type fuse. The volume control knob 24 can adjust the volume of the buzzer that sounds at the time of alarm / warning. Power cord / plug 25 is AC 1
It is connected to an outlet of 00V, 120V or 150V. A lead storage battery is housed in the battery unit 26. The pole clamp 27 is used when the device is attached to a stand. By connecting a predetermined nurse call kit to the nurse call connector unit 28, the alarm / warning status of this device can be remotely monitored at the nurse center of the hospital. The buzzer 29 is a buzzer drive circuit for alarm / warning sound when the device enters the alarm / warning state (see FIG. 5).
, Indicated by 30), and generates a buzzer sound.

As shown in FIG. 5, the operation of the entire apparatus is controlled by the CPU 101 as a control unit. The RAM 102 temporarily stores various data used for the arithmetic processing of the CPU 101. ROM103 is CP
A program for operating U101 is stored. A /
The D converter 35 converts an analog signal such as a bubble detection level and a battery voltage level into a digital signal to convert it into the CPU 101.
Output to. The battery voltage detection circuit 36 detects the voltage of the built-in battery and outputs the detected voltage value to the CPU 101. The door open detection circuit 37 can detect whether or not the door of the device has been opened.

When infusion is performed, the tube 91 connected to the infusion bag 90 is set in the door 51 shown in FIG. As a result, similarly to the case shown in FIG. 7, the infusion actuation unit 17 is provided in the middle of the tube 91 that connects the infusion bag 90 and the human body 92, and the pressure increase sensor 18 is provided on the downstream side thereof. Then, the infusion is performed by the CPU 101.
According to the flowchart shown in FIG.
(This algorithm is stored in the ROM 103).
When the power switch 1 is turned on, the CPU 101 waits until the start key 4c or 9c is input (step S1).

When the start key 4c or 9c is pressed, the motor is rotated to cause the liquid transfusing section 17 to start the liquid feeding operation. At the same time, the automatic restart prohibition flag, which indicates that the infusion operation section 17 is automatically restarted, is reset, that is, turned off (step S2). In this reset state, after an abnormality has once occurred and the infusion solution operating unit 17 has stopped, the infusion solution operating unit 17 is automatically restarted as soon as the restart condition is satisfied.

During the liquid feeding operation, it is constantly monitored whether or not there is a key input by the operator, so-called human intervention. Since the liquid feeding operation is being performed, the key input here means a setting key input other than the start keys 4c and 9c. For example, infusion flow rate keys 4a, 9a,
The input is to enter the planned infusion volume keys 4b, 9b. When the setting key is input, the automatic restart prohibition flag is immediately set, that is, turned on (step S4). When there is no setting key input, the automatic restart prohibition flag is kept in the reset state, and the infusion actuation unit 17 is made to continue the liquid delivery.

During the liquid feeding operation, the output of the pressure increase sensor 18 is sampled at a predetermined sampling interval Δt (step S5). The obtained sampling value D is compared with the reference value N1 (see FIG. 8) representing the closed state (step S6). If D <N1, it is determined that the downstream blockage has not occurred, and the process returns to step S3 to continue sampling. When D ≧ N1, it is determined that downstream blockage has occurred, and an alarm is issued. At the same time, a stop command is given to the liquid transfusing section 17 to stop the liquid feeding operation (step S
7).

Even after the infusion actuation unit 17 is stopped (during the downstream blockage alarm), it is monitored whether there is a setting key input (human intervention) (step S8). When the setting key is input, the automatic restart prohibition flag is immediately set (step S9). If there is no setting key input, the automatic restart prohibition flag remains as it is.
(It may or may not already be set).

Then, the output of the pressure increase sensor 17 is sampled in the same manner as during the liquid feeding operation (step S1).
0), the obtained sampling value D is compared with the reference value N0 representing a normal state (step S11). When D> N0, it is determined that the downstream blockage remains, and sampling is continued. On the other hand, when D ≦ N0, it is determined that the downstream block has been released, and the process proceeds to the next step S12.

In step S12, if the start key 4c or 9c is manually input, the infusion operation unit 17
And restarts to step S2. On the other hand, if the start key 4c or 9c is not input, step S13
Go to and refer to the ON / OFF status of the automatic restart prohibition flag. If the automatic restart prohibition flag is in the off state, the infusion actuating unit 17 is automatically restarted as long as restart conditions other than the downstream blockage are satisfied (step S14). On the other hand, if the automatic restart prohibition flag is on, the process returns to step S1 and waits for the operator to input the start key 4c or 9c. That is, it does not restart automatically, but waits for manual input before restarting.

As described above, when there is a setting key input after the infusion operation portion 17 is stopped due to the occurrence of the downstream blockage, the infusion solution operation portion 17 is released from the downstream blockage and the start key 4c or 9c is not pressed. It is restarted only at some time, that is, only when both conditions of steps S11 and S12 are satisfied. That is, even if the downstream blockage is released, it is not automatically restarted, but only manually restarted. Therefore, even if the operator does not stop the infusion operation unit 17 once, the operator can remove the cause of the abnormality that caused the downstream blockage, inject the infusion rate (speed), or infusion schedule without stopping the infusion operation unit 17. You can set the amount.
After that, it is restarted by pressing the start key. in this way,
According to this device, as compared with the conventional device, the infusion actuation unit 17 is temporarily operated.
It is possible to omit the trouble of stopping the operation and simplify the operation after the occurrence of the downstream blockage.

On the other hand, if there is no setting key input, the infusion actuation unit 17 is released from the downstream blockage and the step S11 is performed.
To S14, or restarted when the start key 4c or 9c is input in step S12. That is, automatic restart and manual restart are possible. In other words, when the occlusion occurs temporarily due to the patient turning over and the like, and then immediately released, the infusion actuation unit 17 is automatically restarted. Therefore, as in the conventional case, it is possible to prevent the operator from being bothered one by one due to a temporary cause.

[0026]

As is apparent from the above, according to the present invention, the infusion actuation section is stopped due to the occurrence of blockage, and before or after the stop, it is detected whether or not there is a set key input, that is, human intervention, and the human interaction is detected.・ When there is an intervention, the infusion operation section is restarted only when the blockage is released and there is a start key input, so unlike the conventional method, the operator temporarily stops the infusion operation section by key input. You do not have to operate. Therefore, the operation after the occurrence of blockage can be simplified. On the other hand, when there is no human intervention before and after the infusion actuation unit is stopped, the infusion actuation unit is restarted when the blockage is released or the start key is pressed. It is possible to prevent the operator from being bothered by a specific cause.

[Brief description of drawings]

FIG. 1 is a diagram showing an operation flow of an infusion pump according to an embodiment of the present invention.

FIG. 2 is a view showing the infusion pump device seen from the front.

FIG. 3 is a diagram showing a side door of the infusion pump device opened.

FIG. 4 is a diagram showing the infusion pump device viewed from the rear.

FIG. 5 is a block diagram showing an electric system of the infusion pump device.

FIG. 6 is a diagram showing characteristics of a downstream blockage detector.

FIG. 7 is a diagram showing a main part of a conventional infusion pump.

FIG. 8 is a diagram showing an operation flow of a conventional infusion pump device.

[Explanation of symbols]

 2 Alarm / Warning indicator 3 Programming indicator 4c, 9c Start key 17 Infusion actuation unit 18 Pressure rise sensor 50 Key panel

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Keita Hara, 22-22 Nagaike-cho, Abeno-ku, Osaka-shi, Osaka Prefecture Sharp Corporation (72) Inventor Edmund Di Dasilva, United States 60035, Highland Park, Illinois, Half Day Road 909 (72) Inventor John Di Lawson Capri Terrace 1213, McHenry, Illinois 60050 United States Kenneth Emlin, Inventor Kenneth Emlin, United States 60050 Springbrook Court 118, MacHenry, Illinois Turn

Claims (2)

[Claims] 1. A downstream occlusion detector for detecting a blockage of the tube on the downstream side of the infusion solution operating section, which has an infusion solution operating section for sending the liquid in the tube to the downstream side in the middle of the tube connected to the infusion solution bag. An infusion device having a controller for stopping the operation of the infusion actuation unit when the downstream obstruction detector detects an obstruction, wherein the controller stops the infusion actuation unit due to the occurrence of the obstruction. When the setting key input is made, the setting key input determination means for detecting whether or not there is a setting key input, the starting key input determination means for determining whether or not there is a starting key input, and the setting key input determination means are the setting key It is determined that there is an input, the downstream blockage detector outputs a signal indicating that the blockage has been released, and the start key input determination means determines that there is the start key input. Only when the setting is made, the first restart commanding means for restarting the infusion actuation section and the setting key input determining means determine that there is no setting key input, and the downstream blockage detector releases the blockage. An infusion solution that outputs a signal indicating that the infusion operation has been performed, or has a second restart command means for restarting the infusion operation section when the activation key input determination means determines that there is the activation key input. apparatus. 2. A downstream blockage detector having an infusion solution actuation unit for sending the liquid in the tube to the downstream in the middle of the tube connected to the infusion solution bag, and detecting that the tube is obstructed on the downstream side of the infusion solution actuation unit. A method of controlling an infusion device, comprising: stopping the infusion actuation unit when the downstream obstruction detector detects obstruction, and detecting whether or not there is a setting key input before and after the infusion actuation unit is stopped, When there is the setting key input, the downstream blockage detector outputs a signal indicating that the blockage has been released, and the infusion actuation unit is restarted only when there is a start key input. If there is no input,
A method for controlling an infusion device, wherein the downstream obstruction detector outputs a signal indicating that the obstruction is released, or restarts the infusion actuation unit when a start key is input.