JP3256013B2 - Infusion device and control method thereof - Google Patents

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 infusion at medical sites and a control method thereof. More specifically, the present invention relates to an infusion device which is provided with an infusion operation section in the middle of a tube connecting an infusion bag and a human body, temporarily stops the infusion operation section when the tube is closed, and then restarts the infusion apparatus and a control method therefor.

[0002]

2. Description of the Related Art Conventionally, as an infusion device of this kind, FIG.
As shown in the figure, an infusion operating section 217 for sending the liquid in the tube 91 downstream is provided in the middle of the tube 91 connecting the infusion bag 90 and the human body 92.
7 is provided with a pressure increase sensor (downstream blockage detector) 218 on the downstream side. The infusion operation unit 217 is driven by the control unit (CPU) 201 via the interface I / O (for simplicity, the interface I / O is omitted in the following description). The tube 91 has elasticity. When the internal pressure increases, 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 the 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 outputs in that state.

This infusion device is controlled according to a flowchart shown in FIG. That is, at the time of operation, the CPU 201 shown in FIG. 7 drives the infusion operating section 217 to start the infusion (step S101). The CPU 201 samples the output of the sensor 218, that is, causes the RAM (random access memory) 202 to temporarily read the sensor output (step S102). Next, a comparison is made between the sampled sensor output D and the downstream occlusion reference value N1 (stored in the ROM (read only memory) 203) (step S103), and the sensor output D is compared with the reference value N1. If it is smaller, sampling is continued. On the other hand, when D ≧ N1, the operation of the infusion operation unit is stopped, and the alarm / warning indicator 4 indicates that the downstream blockage has occurred (the buzzer sound is also generated). The CPU 201 further continues sampling (step S105), and when the sensor output D falls below the normal reference value N0 (step S105).
106), the infusion operating unit 217 is automatically restarted (step S107). This prevents the operator (a nurse or the like) from being bothered by a temporary cause such as a patient turning over.

[0004]

By the way, in a state where the infusion working part 217 is once stopped due to the occurrence of downstream blockage,
When the operator who hears the alarm buzzer presses the mute key or the like, the sensor output D may become lower than the normal reference value N0 in some time. For example, the obstruction state may be temporarily released due to the patient turning over. In this case, in the conventional infusion device, even if the operator is checking the state of the tube, the infusion operation unit 2
17 restarts automatically. For this reason, the operator must once stop the operation by key input, remove the cause of the abnormality, and then press the start key again, which is a problem that the operation is troublesome. Also, when the operator sets (changes) the infusion flow rate (velocity), scheduled infusion volume, etc. by key input during the liquid feeding operation, the downstream blockage occurs temporarily as in the above case, and it is immediately released. May be done. In this case, the operator stops the operation once by key input, presses a setting key (meaning a key other than the above-mentioned start key throughout this specification), resets the setting, and then presses the start key again. You have to do the operation. As described above, the conventional infusion device has a problem that the operation after the occurrence of the blockage is troublesome.

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

[0006]

In order to achieve the above object, an infusion device of the present invention has an infusion operating section for sending the liquid in the tube downstream in the middle of the tube connected to the infusion bag, A transfusion device having a downstream obstruction detector for detecting that the tube is obstructed on the downstream side of the section, wherein when the downstream obstruction detector detects obstruction, the control section stops the operation of the transfusion operating section. When the infusion operating unit is stopped due to the occurrence of the blockage, the control unit determines whether there is a setting key input, and determines whether there is a start key input. Starting key input determining means, and the setting key input determining means determines that there is the setting key input,
Only when the downstream occlusion detector outputs a signal indicating that the occlusion has been released and the starting key input determining means determines that the starting key input is present, the infusion operating section is restarted. 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 outputs the signal indicating that the blockage has been released. When the key input determining means determines that there is the start key input, the apparatus has a second restart command means for restarting the infusion operating section.

[0007] Further, a method of controlling an infusion device according to the present invention comprises:
An infusion device having a transfusion operating portion that sends the liquid in the tube downstream in the middle of the tube connected to the infusion bag, and a downstream occlusion detector that detects that the tube is blocked downstream of the infusion operation portion. In the control method, when the downstream occlusion detector detects occlusion, the infusion operating section is stopped, and whether or not there is a setting key input before and after the infusion operating section is stopped is detected. In some cases, the downstream blockage detector outputs a signal indicating that the blockage has been released, and restarts the infusion operating unit only when there is a start key input, while there is no setting key input, The downstream occlusion detector outputs a signal indicating that the occlusion has been released, or restarts the infusion operating section when a start key is input.

[0008]

The infusion operation section stops when the blockage occurs. The setting key input determining means determines whether there is a setting key input before or after the stop of the infusion operating unit. When there is a setting key input, the infusion operating section outputs a signal indicating that the downstream occlusion detector has released the occlusion by the first restart instruction means, and the start key input determination means starts the operation. It is restarted only when it is determined that there is a key input. That is, even if the blockage is released, the restart is not automatically performed, but only the manual restart is possible. Therefore, even if the operator does not need to stop the infusion operating unit by key input, the operator can remove the cause of the above-described blockage, remove the infusion flow rate (velocity), and maintain the infusion operating unit in the stopped state. The setting of the scheduled amount can be performed.
Thereafter, the operation is restarted by input of a start key. in this way,
According to the present invention, the trouble of temporarily stopping the infusion operating unit is omitted, and the operation after the downstream blockage occurs is simplified.

On the other hand, when there is no input of the setting key, the infusion operating unit outputs a signal indicating that the downstream occlusion detector has released the occlusion by the second restart instruction means, or It is restarted when the start key input determining means determines that there is a start key input. That is, automatic restart and manual restart are possible. In other words, after a temporary blockage due to a patient turning over,
If it is immediately released, the infusion operating section automatically restarts. Therefore, the operator is not bothered as in the conventional case.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The infusion device of the present invention and its control method will be described in detail below with reference to embodiments.

FIG. 2 is a front view of an infusion infusion pump device (hereinafter, simply referred to as "device") according to an embodiment of the present invention. FIG. FIG. 4 shows the apparatus as viewed from behind. FIG. 5 shows the electric system of this device.

As shown in FIG. 2, a front key panel 50 is provided.
Are provided with various elements such as a power switch 1.
The power switch 1 is connected to a power circuit (3 in FIG. 5) of the entire apparatus.
1) is turned on and off. Pressing the switch once turns on the power of the entire apparatus, and pressing the switch again turns off the power. When the power is turned on, a self-test (checking the operation of each unit described later) is temporarily performed automatically. 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 outputs a signal detected by a detector, which will be described later, to a CP.
U (shown at 101 in FIG. 5), thereby displaying all alarm and warning messages. The programming display 3 displays all program information related to infusion, such as the infusion flow rate, the planned infusion amount, and the infusion accumulated amount, which are input for the main infusion and the auxiliary infusion. The infusion flow rate is
ml / hr, the estimated infusion volume and the cumulative infusion volume are displayed in units of ml. When performing only one infusion (main infusion), 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 start the infusion operation unit 17.
(By the 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 input with the numerical key 5. When the button is pressed, the display becomes 0, and the operator can input a numerical value again. The stop key 7 is pressed to stop the infusion. If no operation is performed on the infusion unit 17 for 2 minutes after the infusion unit 17 stops, a warning buzzer sounds. Pressing the buzzer stop key 8 causes the alarm / warning sound to pause for 2 minutes. However, even if this key 8 is pressed, the display contents of the alarm / warning display 2 do not change. The auxiliary infusion key 9 is used to input an infusion flow rate and a scheduled infusion amount (by the keys 9a and 9b) and to start the infusion operation unit 17 when the auxiliary infusion is sent (start key 9).
c). The operation lamp 10 includes an alarm lamp 10a, a lamp 10b during infusion, and a warning lamp 10c. The warning lamp 10a is made up of a red light emitting diode and blinks during the warning mode to immediately notify that an appropriate action is required. The infusion lamp 10b is composed of a green light emitting diode, which is always lit during infusion,
Turns off when 7 stops. The warning lamp 10c is
Consists of yellow light emitting diodes, illuminated during the warning mode to indicate that appropriate action is required. When the warning lamp 10a or the warning lamp 10c blinks, an alarm /
The cause is displayed on the warning display 2. Reset key 1
If 1 is pressed while the infusion operating unit 17 is stopped, the infusion accumulated amount (the sum of the main infusion and the auxiliary infusion) is reset to 0. When the infusion accumulated amount key 12 is pressed, the accumulated infusion amount (sum of the main infusion and the auxiliary infusion) is displayed, and thereafter, the infusion flow rate and the scheduled infusion registered for the main infusion and the auxiliary infusion are displayed. When the backlight key 13 is pressed once while the apparatus is operating on an AC power supply, the backlight of the alarm / warning display 2 and the programming display 3 is turned on. Pressing it again turns off the backlight. When the device is running on batteries, the backlight is turned on only while the key 13 is pressed. The door handle 14 is used to open and close the door 51. When opening door 51, handle 1
Lift the bottom of 4 sufficiently to the front and pull the door. When closing the door 51, the reverse operation is performed. Charging lamp 1
5 is a green light-emitting diode, which is always lit while the device is connected to an AC power supply, indicating that the internal battery is being charged.

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

As shown in FIG. 3, elements are provided on the upstream side and the downstream side of the infusion operating section 17, respectively. The pressure drop sensor (upstream blockage detector) 16 is
A pressure drop state caused by an abnormality (for example, clogging of a drug solution filter) between the (infusion bag) and the infusion operating unit 17 is detected. The pressure rise sensor (downstream blockage detector) 18 detects a pressure rise state due to an abnormality (for example, blockage) between the infusion operating 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 one of changes such as a resistance value, a current value, a voltage value, and an oscillation frequency. Etc. can be used. The bubble sensor (bubble detector) 19 detects whether or not bubbles exceeding a specified amount exist 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.

Further, as shown in FIG. 4, various elements are 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 putting various keys and a power switch in an input-prohibited state, and can be set so that this device is not operated by anyone except a doctor or nurse. The designated time-lag type fuse is built in the fuse holder 23. According to the volume control knob 24, the volume of the buzzer that sounds at the time of an alarm / warning can be adjusted. The power cord / plug 25
Connected to a 00V, 120V or 150V outlet. The battery unit 26 contains a lead storage battery. The pole clamp 27 is used when attaching this device to a stand. If a predetermined nurse call kit is connected to the nurse call connector section 28, the alarm / warning state of the device can be monitored remotely at a nurse center of a hospital. The buzzer 29 is provided with an alarm / warning sound buzzer drive circuit (FIG. 5) when the device enters an alarm / warning state.
At 30) to generate a buzzer sound.

As shown in FIG. 5, the operation of the entire apparatus is controlled by a CPU 101 as a control unit. The RAM 102 temporarily stores various data used for the arithmetic processing of the CPU 101. ROM 103 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, and converts the analog signal into a digital signal.
Output to The battery voltage detection circuit 36 detects the voltage of the internal battery and outputs the detected voltage value to the CPU 101. The door opening detection circuit 37 can detect whether or not the door of the apparatus has been opened.

When performing an infusion, a tube 91 connected to the infusion bag 90 is set in the door 51 shown in FIG. As a result, as in the case shown in FIG. 7, the infusion operation section 17 is provided in the middle of the tube 91 connecting the infusion bag 90 and the human body 92, and the pressure increase sensor 18 is provided downstream thereof. And the infusion is CPU 101
Is performed 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 for the input of the start key 4c or 9c (step S1).

When the start key 4c or 9c is depressed, the motor is rotated to cause the infusion operation section 17 to start the liquid feeding operation. At the same time, the automatic restart prohibition flag indicating that the infusion operating section 17 is automatically prohibited from being restarted is reset, that is, turned off (step S2). In this reset state, once an abnormality occurs and the infusion operating unit 17 stops, the infusion operating unit 17 automatically restarts as soon as the restart condition is satisfied.

During the liquid feeding operation, it is always monitored whether there is a key input by the operator, that is, whether there is a 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, the infusion flow rate keys 4a, 9a,
This is an input of the planned infusion volume keys 4b and 9b. When the setting key is input, the automatic restart prohibition flag is immediately set, that is, turned on (step S4). If there is no setting key input, the infusion operating unit 17 is caused to continue feeding while the automatic restart prohibition flag remains in the reset state.

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 a reference value N1 (see FIG. 8) indicating the closed state (step S6). If D <N1, it is determined that downstream occlusion has not occurred, and the process returns to step S3 to continue sampling. When D ≧ N1, it is determined that downstream occlusion has occurred, and an alarm is issued. At the same time, a stop command is given to the infusion operation unit 17 to stop the infusion operation (step S
7).

After the infusion operation unit 17 is stopped (during the downstream blockage alarm), it is monitored whether there is a setting key input (human intervention) (step S8). If the setting key is input, the automatic restart prohibition flag is immediately set (step S9). If there is no setting key input, leave the automatic restart prohibition flag as it is
(Some cases are already set and some are not.)

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

In step S12, if there is a manual input of the start key 4c or 9c, the infusion operating section 17
And returns to step S2. On the other hand, if there is no input from the start key 4c or 9c, step S13
Go to the ON / OFF state of the automatic restart prohibition flag. If the automatic restart prohibition flag is in the OFF state, the infusion operating unit 17 is automatically restarted as long as other restart conditions other than the downstream occlusion 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 and restarts.

As described above, when there is a setting key input after the infusion operating unit 17 is stopped due to the occurrence of downstream occlusion, the infusion operating unit 17 is released from the downstream occlusion and the input of the start key 4c or 9c is performed. Only when there is, that is, when both of the conditions of steps S11 and S12 are satisfied, the operation is restarted. That is, even if the downstream blockage is released, the restart is not automatically performed, but only the manual restart is possible. Therefore, even if the operator does not stop the infusion operating unit 17 once, the operator can remove the cause of the abnormality that caused the downstream obstruction while maintaining the infusion operating unit 17 in the stopped state, and can perform the infusion flow rate (speed) and the infusion schedule. Or set the amount.
Thereafter, the operation is restarted by the start key input. in this way,
According to this device, once the infusion operating unit 17
Can be omitted, and the operation after the occurrence of downstream blockage can be simplified.

On the other hand, if there is no input of the setting key, the infusion operating unit 17 is released from the downstream blockage and the flow goes to step S11.
The process proceeds from step S14 to step S14, or is restarted when the start key 4c or 9c is input in step S12. That is, automatic restart and manual restart are possible. That is, when the obstruction is temporarily released after the patient temporarily turns over due to turning over or the like, the infusion operating unit 17 automatically restarts. Therefore, as in the related art, it is possible to prevent the operator from being bothered by a temporary cause.

[0026]

As is apparent from the above description, according to the present invention, the transfusion operating section is stopped by the occurrence of the blockage, and before and after the stop, the setting key input, that is, the presence or absence of the human intervention is detected, and the human intervention is detected. -If there is an intervention, the infusion operation section is restarted only when the blockage is released and there is a start key input. There is no need to operate. Therefore, the operation after the occurrence of the blockage can be simplified. On the other hand, if there is no human intervention before and after the stop of the infusion unit, the blockage is released, or the infusion unit is restarted when the start key is pressed. It is possible to prevent the operator from being bothered by a specific cause.

[Brief description of the drawings]

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

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

FIG. 3 is a view showing a state where a side door of the infusion pump device is opened.

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

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

FIG. 6 is a diagram illustrating characteristics of a downstream occlusion detector.

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

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

[Explanation of symbols]

 2 Alarm / warning display 3 Programming display 4c, 9c Start key 17 Infusion operation section 18 Pressure rise sensor 50 Key panel

──────────────────────────────────────────────────続 き Continued on the front page (72) Keita Hara 22-22, Nagaike-cho, Abeno-ku, Osaka City, Osaka Prefecture Inside Sharp Corporation (72) Inventor Edmund di Dasilva Half-Hill, Hyland Park, Illinois 60035 United States of America Day Road No. 909 (72) Inventor John Di Lawson United States 60050 Illinois Mac Henry, Capri Terrace 1213 (72) Inventor Kenneth M. Lin United States 6050 Illinois Mac Henry, Springbrook Court 118 (56) References JP-A-2-289260 (JP, A) JP-A-2-140174 (JP, A) JP-A-64-58262 (JP, A) JP-A 1-249064 (JP, A) Pp. 64-43937 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , (DB name) A61M 5/00 335

Claims (2)

(57) [Claims] 1. A downstream occlusion detector that has an infusion operating section that sends liquid in the tube downstream in the middle of a tube connected to an infusion bag, and that detects that the tube is closed downstream of the infusion operating section. A transfusion device for stopping the operation of the infusion operation unit by a control unit when the downstream occlusion detector detects occlusion, wherein the control unit stops the infusion operation unit due to the occurrence of the occlusion Setting key input determining means for detecting whether or not there is a setting key input; starting key input determining means for determining whether or not there is a starting key input; Input is determined, the downstream blockage detector outputs a signal indicating that the blockage is released, and the start key input determination means determines that the start key input is present. The first restart command means for restarting the infusion operating section and the setting key input determining means determine that there is no setting key input, and the downstream blocking detector releases the blocking. An infusion having a second restart commanding means for restarting the infusion operating part when a signal indicating that the infusion has been performed or when the starting key input determining means determines that the starting key input is present. apparatus. 2. A downstream occlusion detector that has an infusion operating section that sends the liquid in the tube downstream in the middle of the tube connected to the infusion bag, and that detects that the tube is closed downstream of the infusion operating section. A control method of an infusion device having, when the downstream occlusion detector detects occlusion, stops the infusion operation section, detects whether there is a setting key input before and after the infusion operation section stop, When there is the setting key input, the downstream occlusion detector outputs a signal indicating that the occlusion has been released, and only when there is a start key input, the infusion operating section is restarted. If there is no input,
A method of controlling an infusion device, wherein the downstream occlusion detector outputs a signal indicating that the occlusion has been released, or restarts the infusion operation section when a start key is input.