JP2022088764A - Syringe pump - Google Patents

Abstract

To provide a technique for reducing a load on a user in a syringe pump.SOLUTION: A syringe pump includes a start switch, a clamp for holding a syringe, and a drive part. The syringe pump shifts a state of the syringe pump to a start state when the start switch is operated (YES in Step S10). The syringe pump 100 shifts the state of the syringe pump to the start state even when the start switch is not operated when deviation of at least one of the clamp and the drive part is detected (YES in Step S10).SELECTED DRAWING: Figure 13

Description

The present disclosure relates to a syringe pump.

As a prior document disclosing the configuration of a syringe pump, there is International Publication No. 2009/113341 (Patent Document 1). The syringe pump described in Patent Document 1 has a mechanism for detecting that each of the syringe body and the syringe pusher is correctly set in the syringe pump by using various sensors.

International Publication No. 2009/113341

The syringe pump described in Patent Document 1 is configured to be started by a user operating a start switch and to execute an operation check of the syringe pump. On the other hand, in the field where a syringe pump is used, a syringe pump user such as a medical worker has a lot of things to do, and a technique for reducing the burden on the user has been required.

The present disclosure has been devised in view of such circumstances, and an object thereof is to provide a technique for reducing a burden on a user in a syringe pump.

According to a certain aspect of the present disclosure, a syringe pump including a holding portion for holding a syringe, a displacement detecting sensor for detecting the displacement of the holding portion, and a control unit for acquiring the detection output of the displacement detecting sensor. , A syringe pump is provided in which the control unit is configured to start the syringe pump in response to the displacement of the holding unit being detected by the displacement detection sensor.

The control unit may be configured to start an operation check of the syringe pump when the syringe pump is started.

The syringe pump may further include a holding state detection sensor for detecting that the holding portion is in a holding state for holding the syringe. The control unit may notify a given information according to the detection that the holding unit is in the holding state by the holding state detection sensor in the operation check.

The holding portion may include a first holding portion for holding the barrel of the syringe and a second holding portion for holding the rod of the syringe. The displacement detection sensor may include a first sensor that detects the displacement of the first holding portion and a second sensor that detects the displacement of the second holding portion. The control unit may be configured to start the syringe pump in response to the displacement being detected by at least one of the first sensor and the second sensor.

The control unit may release the start of the syringe pump in response to not detecting an operation on the syringe pump for a certain period of time.

According to the present disclosure, the user can start the syringe pump by shifting the holding portion of the syringe pump when mounting the syringe on the syringe pump. As a result, the user does not need to perform any special operation for starting the syringe pump.

It is a perspective view which shows the appearance of each of the syringe pump which concerns on one Embodiment of this invention, and the syringe attached to a syringe pump. FIG. 3 is a plan view of the syringe pump of FIG. 1 as viewed from the direction of arrow II. FIG. 3 is a front view of the syringe pump of FIG. 1 as viewed from the direction of arrow III. It is a figure which shows the state which the syringe is attached to the syringe pump. It is a figure which shows an example of the state which the clamp 112 is displaced from the state shown in FIG. It is a figure which shows the other example of the state which the clamp 112 is displaced from the state shown in FIG. It is a side view which saw the syringe pump of FIG. 1 from the direction of arrow VII. The figure which shows the upper surface of the drive part 120 schematically is shown. It is a figure which shows typically the mechanism for detecting the displacement of a clutch lever 123. It is a figure which shows typically the mechanism for detecting the displacement of a clutch lever 123. It is a figure for demonstrating the structure of the displacement detection sensor 911 and the displacement detection sensor 912. It is a figure which shows the hardware composition of a syringe pump 100. It is a flowchart of the process executed for the control of a syringe pump 100. It is a figure which shows an example of the screen which displays the result of a self-test. It is a figure which shows the other example of the screen which displays the result of a self-test. It is a figure which shows the further example of the screen which displays the result of a self-test.

Hereinafter, the syringe pump according to the embodiment of the present invention will be described with reference to the drawings. In the following description of the embodiment, the same or corresponding parts in the drawings are designated by the same reference numerals, and the description thereof will not be repeated.

[Appearance of syringe pump]
FIG. 1 is a perspective view showing the appearance of a syringe pump according to an embodiment of the present invention and a syringe attached to the syringe pump. FIG. 2 is a plan view of the syringe pump of FIG. 1 as viewed from the direction of arrow II. FIG. 3 is a front view of the syringe pump of FIG. 1 as viewed from the direction of arrow III. FIG. 4 is a diagram showing a state in which a syringe is attached to a syringe pump.

As shown in FIG. 1, the syringe pump 100 is a syringe pump applied to the syringe 10. The syringe 10 includes a barrel 20 and a plunger rod 30.

The barrel 20 has a substantially cylindrical outer shape. A liquid injection port 22 is provided at the tip of the barrel 20. A first flange 21 is provided at the rear end of the barrel 20. The barrel 20 is made of a transparent or translucent resin such as polypropylene. The inside of the barrel 20 is filled with a chemical solution.

The plunger rod 30 is fitted inside the barrel 20 and has a second flange 31 at the rear end. A gasket portion 32 that is in sliding contact with the inner peripheral surface of the barrel 20 is provided on the tip end side of the plunger rod 30.

The syringe pump 100 is configured to start when a displacement of an element holding the syringe (clamp 112 and drive unit 120, which will be described later) is detected for attaching / detaching the syringe 10. Thereby, the user (for example, a medical worker) can start the syringe pump 100 by displacing the element in an attempt to mount the syringe in a state where the syringe pump 100 is not started. Hereinafter, the configuration of the syringe pump 100 will be described in detail.

As shown in FIGS. 1 to 4, the syringe pump 100 includes an operation panel 180. The operation panel 180 is provided with various switches including a start switch 170 and displays 181, 182. In one embodiment, the display 181 displays information about the drug filled in the syringe 10, and the display 182 displays information about the liquid delivery (flow velocity, etc.) of the drug filled in the syringe 10. However, the information displayed on the displays 181, 182 is not limited to these. The displays 181, 182 may be configured by a touch panel, in which case the user may input information to the syringe pump 100 by touching the displays 181, 182.

The syringe pump 100 includes a barrel receiving unit 110 and a driving unit 120.

The barrel 20 is placed on the barrel receiving portion 110. The barrel receiving portion 110 has a concave surface portion that is in contact with the lower portion of the outer peripheral surface of the barrel 20. A groove 111 is provided at the rear end of the barrel receiving portion 110.

A holding plate 119 is inserted in the groove portion 111. A member (not shown) for urging the holding plate 119 toward the left side (opposite to the driving unit 120) of FIG. 2 is arranged in the groove portion 111. A Hall element 131 is provided in the main body of the barrel receiving portion 110, and a magnet 132 is embedded in the holding plate 119. The first flange 21 is inserted between the Hall element 131 and the magnet 132 (pressing plate 119).

The syringe pump 100 further includes a drive unit 120. The drive unit 120 is connected to the barrel receiving unit 110 by the connecting unit 124. The connecting portion 124 is expandable and contractible, whereby the distance between the barrel receiving portion 110 and the driving portion 120 can be changed.

The drive unit 120 has a pressing surface 121 that presses the second flange 31, and a movable claw portion 122 that sandwiches and holds the second flange 31 with the pressing surface 121. The movable claw portion 122 is urged in a direction approaching the pressing surface 121 by an urging mechanism such as a spring. The drive unit 120 movably holds the plunger rod 30 toward the barrel 20. The double-headed arrow D1 represents the moving direction of the drive unit 120. The plunger rod 30 is moved toward the barrel 20 by the drive unit 120, so that the chemical solution in the barrel 20 is injected into the tube from the injection port 22. The arrow D3 in FIG. 1 indicates the direction in which the drive unit 120 separates from the barrel receiving unit 110 in the direction indicated by the double-headed arrow D1. The arrow D3 will be described later with reference to FIG.

The syringe pump 100 further includes a pressing sensor 140. The pressing sensor 140 detects the presence or absence of pressing by a member such as the second fringe 31 on the pressing surface 121.

The drive unit 120 further has a clutch lever 123 for manually adjusting the position of the drive unit 120 itself and the position of the movable claw portion 122 in the extending direction of the plunger rod 30 when the plunger rod 30 is attached / detached. is doing. Specifically, by rotating the clutch lever 123 in one direction, the drive unit 120 is in a locked state in which manual movement is restricted, and the movable claw unit 122 is urged toward the pressing surface 121 side. It is maintained in a state of being. By rotating the clutch lever 123 in the other direction, the drive unit 120 is unlocked, and the movable claw unit 122 is moved away from the pressing surface 121 against the urging force.

The configuration of the drive unit 120 is not limited to the above, and the drive unit 120 has a pressing surface 121 for pressing the second flange 31 and a fixed claw portion for accommodating the second flange 31 between the pressing surface 121. You may be doing it.

The syringe pump 100 includes a clamp 112 above the barrel receiving portion 110. The clamp 112 rotates in the direction of the double-headed arrow R0 and can be expanded and contracted in the vertical direction (direction of the double-headed arrow D2). The clamp 112 includes a telescopic portion 112A and a blade portion 112X.

FIG. 5 is a diagram showing an example of a state in which the clamp 112 is displaced from the state shown in FIG. FIG. 6 is a diagram showing another example of the state in which the clamp 112 is displaced from the state shown in FIG.

When a user (for example, a medical worker) rotates the clamp 112 in the state shown in FIG. 1 in the direction of the double-headed arrow R0, the clamp 112 is displaced to the state shown in FIG. In FIG. 1, the blade portion 112X is oriented along the longitudinal direction of the barrel receiving portion 110, whereas in FIG. 5, the blade portion 112X is oriented in the direction intersecting the longitudinal direction of the barrel receiving portion 110. ..

When the user moves the clamp 112 in the state shown in FIG. 5 in the direction of the double-headed arrow D2 (downward), the clamp 112 is displaced to the state shown in FIG. In the state shown in FIG. 6, the expansion / contraction portion 112A is compressed and the blade portion 112X is located below the state shown in FIG. As a result, the syringe 10 can be reliably held by the barrel receiving portion 110 and the blade portion 112X.

Next, a mechanism for detecting the displacement of the drive unit 120 will be described. FIG. 7 is a side view of the syringe pump of FIG. 1 as viewed from the direction of arrow VII. In FIG. 7, the rotation direction of the clutch lever 123 is indicated by the double-headed arrow R1.

The syringe pump 100 includes a displacement detection sensor 921 for detecting the movement of the drive unit 120 in the direction of the double-headed arrow D1 (FIG. 1). The displacement detection sensor 921 includes a floodlight 921A and a receiver 921B. The drive unit 120 includes a plate body 120X.

FIG. 8 shows a diagram schematically showing the upper surface of the drive unit 120. The dimensions of the plate body 120X in the horizontal plane change along the direction of the double-headed arrow D1. As the drive unit 120 moves in the direction of the double-headed arrow D1, the amount of light emitted from the floodlight 921A that is shielded by the plate body 120X changes, whereby the light from the floodlight 921A in the receiver 921B changes. The amount of light received changes. Therefore, in the syringe pump 100, it can be detected that the drive unit 120 is displaced in the direction of the double-headed arrow D1 based on the detection output of the displacement detection sensor 921.

Next, a mechanism for detecting the displacement of the clutch lever 123 will be described. 9 and 10 each are diagrams schematically showing a mechanism for detecting the displacement of the clutch lever 123.

The syringe pump 100 includes an element 123A that moves in conjunction with the clutch lever 123, a floodlight 161 and a light receiver 162. A displacement detection sensor 160 is configured by the floodlight 161 and the light receiver 162. The element 123A, the floodlight 161 and the light receiver 162 may be housed inside the drive unit 120.

While the element 123A is movable in conjunction with the clutch lever 123, the floodlight 161 and the light receiver 162 are fixed. In FIGS. 9 and 10, the optical axis L1 represents the axis of light emitted from the floodlight 161 toward the receiver 162, and the double-headed arrow D4 represents the moving direction of the element 123A. The element 123A is composed of a member that shields the light emitted from the floodlight 161 such as an opaque resin.

FIG. 9 shows a state in which the clutch lever 123 unlocks the drive unit 120, and FIG. 10 shows a state in which the clutch lever 123 locks the drive unit 120. In the state where the clutch lever 123 unlocks the drive unit 120 (FIG. 9), the element 123A does not block the light emitted from the floodlight 161 but the clutch lever 123 locks the drive unit 120 (FIG. 9). In FIG. 10), the element 123A shields the light emitted from the floodlight 161. The amount of light emitted from the floodlight 161 that is shielded by the element 123A can vary depending on the position of the element 123A. As a result, in the syringe pump 100, the displacement of the clutch lever 123 can be detected based on the amount of light received by the light receiver 162.

Next, a mechanism for detecting the displacement of the clamp 112 will be described. FIG. 11 is a diagram for explaining the configuration of the displacement detection sensor 911 and the displacement detection sensor 912. The syringe pump 100 includes a displacement detection sensor 911 for detecting the displacement of the clamp 112 due to rotation in the direction of the double arrow R0, and a displacement detection sensor for detecting the displacement of the clamp 112 in the vertical direction (double arrow D2 direction). 912 and including. The displacement detection sensors 911 and 912 are housed inside the barrel receiving portion 110.

As shown in FIG. 11, the displacement detection sensor 911 includes a floodlight 911A and a light receiver 911B, and the displacement detection sensor 912 includes a floodlight 912A and a light receiver 912B.

FIG. 11 shows the axis 112B of the clamp 112. The shaft 112B is connected below the telescopic portion 112A. A plate 1121 located between the floodlight 911A and the light receiver 911B and a plate 1122 located between the floodlight 912A and the light receiver 912B are attached to the shaft 112B.

In the plate 1121, the area of the portion located between the floodlight 911A and the light receiver 911B changes according to the rotation of the clamp 112 in the direction of the double-headed arrow R0. As a result, in the syringe pump 100, the displacement of the clamp 112 in the direction of the double arrow R0 can be detected based on the detection output of the displacement detection sensor 911.

In the plate 1122, the area of the portion located between the floodlight 912A and the light receiver 912B changes according to the displacement of the clamp 112 in the direction of the double-headed arrow D2. As a result, in the syringe pump 100, the displacement of the clamp 112 in the double-headed arrow D2 direction can be detected based on the detection output of the displacement detection sensor 912.

[Hardware configuration of syringe pump]
FIG. 12 is a diagram showing a hardware configuration of the syringe pump 100. The syringe pump 100 includes a control unit 150 that controls the operation of the syringe pump 100. The control unit 150 includes a processor 151 that executes a given program, and a memory 152 that stores the program executed by the processor 151 and various data necessary for executing the program. In the syringe pump 100, the operation described herein is achieved by the processor 151 executing a given program. The syringe pump 100 may include a dedicated circuit such as an ASIC (application specific integrated circuit) or an FPGA (field-programmable gate array) instead of the processor 151 or in addition to the processor 151.

The syringe pump 100 includes an interface 101 for communicating with an external device. The communication may be wired, and in this case, the interface 101 may be a USB (Universal Serial Bus) interface. The communication may be wireless, in which case the interface 101 may be a network card. Communication may be both wireless and wired.

The syringe pump 100 includes potentiometers 114 and 126. The potentiometer 114 outputs a voltage value corresponding to the position of the clamp 112 (blade portion 112X) in the direction of the double-headed arrow D2. The potentiometer 126 outputs a voltage value corresponding to the position of the drive unit 120 in the direction of the double-headed arrow D1. Both the potentiometers 114 and 126 output a voltage value to the control unit 150. Here, a method of using the detection output of the potentiometers 114 and 126 will be described.

The processor 151 of the control unit 150 identifies the position of the drive unit 120 in the direction of the double-headed arrow D1 based on the voltage value from the potentiometer 126. When the plunger rod 30 is set in the drive unit 120, the position of the plunger rod 30 changes according to the position of the drive unit 120. The memory 152 may store the remaining amount of the drug in the syringe according to the combination of the syringe size and the voltage value (position of the plunger rod 30), and the processor 151 may store the voltage value from the potentiometer 126. The remaining amount of the corresponding drug may be output.

The processor 151 identifies the position of the clamp 112 in the direction of the double-headed arrow D2 based on the voltage value from the potentiometer 114. The memory 152 may store a voltage value according to the size of the syringe, and the processor 151 stores the size of the syringe according to the voltage value from the potentiometer 126 (for example, a syringe for 10 mL, a syringe for 20 mL, etc.). It may be output. In one embodiment, the user sets the barrel 20 of the syringe 10 on the barrel receiving portion 110 and then lowers the clamp 112 (blade portion 112X) to a position where it abuts on the barrel 20. As a result, the position of the clamp 112 (blade portion 112X) in the direction of the double-headed arrow D2 changes according to the diameter of the barrel 20, thereby changing according to the size of the barrel 20.

The syringe pump 100 includes a force sensor 127. The force sensor 127 detects the magnitude of the force applied to the drive unit 120 in the direction of the arrow D3 in FIG. 1 and outputs it to the control unit 150. The Hall element 131 also outputs each detection result to the control unit 150.

The syringe pump 100 includes a motor 128. The control unit 150 drives the motor 128 in order to move the drive unit 120 in the direction of the double-headed arrow D1.

The syringe pump 100 includes a rotary encoder 129. The rotary encoder 129 detects the amount of rotation of the motor 128 and outputs it to the control unit 150.

The operation panel 180 is connected to the control unit 150. Signals corresponding to operations to various switches in the operation panel 180, including the activation switch 170, are input to the processor 151. The processor 151 controls the display of the displays 181, 182.

Each of the displacement detection sensors 160, 911, 912, 921 is connected to the control unit 150. The processor 151 acquires the detection outputs from the displacement detection sensors 160, 911, 912, 921, respectively.

[Syringe pump self-test]
In the syringe pump 100, the processor 151 performs an operation check of the syringe pump 100. In the present specification, the operation check is referred to as a "self-test".

The syringe pump 100 may perform a check of any item in the self-test, but in one implementation example, the check of each of the following items (1) to (8) is executed in the self-test.

(1) Barrel detection sensor check The processor 151 checks the operation of the sensor (Hall element 131) for detecting the presence or absence of the barrel 20 mounted on the barrel receiving portion 110 as a “barrel detection sensor check”. ..

When the barrel 20 is not set in the barrel receiving portion 110, the magnetic flux of the magnet 132 reaches the Hall element 131. On the other hand, in the state where the barrel 20 is set on the barrel receiving portion 110, the holding plate 119 is urged by the first flange 21 of the barrel 20 toward the right side of FIG. 2 (the side where the drive portion 120 is located). As a result, the distance between the Hall element 131 and the magnet 132 becomes longer than in the state where the barrel 20 is not set in the barrel receiving portion 110. As a result, the magnetic flux of the magnet 132 does not reach the Hall element 131.

In the "barrel detection sensor check", the processor 151 determines that the operation of the Hall element 131 is normal if the Hall element 131 detects the magnetic flux of the magnet 132, and if the Hall element 131 does not detect the magnetic flux, it is abnormal. Judge that there is. As a result, when the Hall element 131 is in a state where the magnetic flux cannot be detected, or when the barrel 20 is set in the barrel receiving portion 110 when the "barrel detection sensor check" is executed, the Hall element 131 operates. Is determined to be abnormal.

(2) Clutch detection sensor check The processor 151 checks the operation of the sensor (displacement detection sensor 160) for detecting the state (lock / unlock) of the clutch lever 123 as a “clutch detection sensor check”. ..

In the "clutch detection sensor check", the processor 151 detects the light emitted from the floodlight 161 by the light receiver 162, and the light receiver 162 does not detect the light while the floodlight 161 does not emit light. To confirm. More specifically, the processor 151 indicates that the detection output of the light receiver 162 when instructing the floodlight 161 to emit light detects the light from the floodlight 161 and emits light to the floodlight 161. When the detection output of the light receiver 162 when instructed not to emit light indicates that the light from the floodlight 161 is not detected, it is determined that the operation of the displacement detection sensor 160 is normal. On the other hand, the processor 151 indicates that the detection output of the light receiver 162 when instructing the floodlight 161 to emit light does not detect the light from the floodlight 161 or does not emit light to the floodlight 161. When the detection output of the light receiver 162 at the time of instructing is indicating that the light from the floodlight 161 is detected, it is determined that the operation of the displacement detection sensor 160 is abnormal.

(3) Pusher detection sensor check The processor 151 checks the operation of the sensor (pressing sensor 140) for detecting the pressing by the element such as the second flange 31 as the “pushing force detection sensor check”.

In one embodiment, the press sensor 140 is capable of outputting a voltage value in the range 0.0V to 5.0V, outputs a voltage value of 1.0V when not pressed, and is pressed. It is configured to output a voltage value of 4.0V when it is in the state of being. In the self-test, if the voltage value output from the pressing sensor 140 is within the range of 1.0V to 4.0V, the processor 151 determines that the operation of the pressing sensor 140 is normal, and outside the range. If there is, it is judged to be abnormal.

(4) Syringe size detection sensor check The processor 151 checks the operation of the sensor (potentiometer 114) for detecting the size of the syringe mounted on the barrel receiving portion 110 as a “syringe size detection sensor check”. do.

In one embodiment, the potentiometer 114 is capable of outputting voltage values in the range 0.0V to 5.0V and outputs voltage values from 1.0V to 4.0V depending on the size of the barrel 20. It is configured as follows. In the self-test, the processor 151 determines that the operation of the potentiometer 114 is normal if the voltage value output from the potentiometer 114 is within the range of 1.0 V to 4.0 V, and if it is outside the range, the processor 151 determines that the operation of the potentiometer 114 is normal. Judge as abnormal.

(5) Sensor check for driving unit position detection The processor 151 checks the operation of the sensor (potentiometer 126) for detecting the position of the driving unit 120 in the direction of the double-headed arrow D1 as a “sensor check for driving unit position detection”. ..

In one embodiment, the potentiometer 126 is capable of outputting voltage values in the range 0.0V to 5.0V and outputs voltage values from 1.0V to 4.0V depending on the position of the drive unit 120. , Is configured. In the self-test, the processor 151 determines that the operation of the potentiometer 126 is normal if the voltage value output from the potentiometer 126 is within the range of 1.0V to 4.0V, and if it is outside the range, the processor 151 determines that the operation of the potentiometer 126 is normal. Judge as abnormal.

(6) Blockage detection sensor check The processor 151 checks the operation of the sensor (force sensor 127) for detecting the presence or absence of blockage in the flow path of the drug filled in the syringe 10 as a “blockage detection sensor check”. do.

In one implementation example, the force sensor 127 can output a voltage value in the range of 0.0V to 5.0V, and outputs a voltage value of 1.0V when no blockage occurs in the flow path. Then, in the state where the blockage occurs in the flow path, the voltage value from a given value exceeding 1.0 V to 4.0 V is output depending on the degree of blockage. In the self-test, if the voltage value output from the force sensor 127 is within the range of 1.0V to 4.0V, the processor 151 determines that the operation of the force sensor 127 is normal, and outside the range. If there is, it is judged to be abnormal.

(7) Motor drive check The processor 151 checks the operation of the motor 128 as a “motor drive check”. More specifically, in the self-test, the processor 151 applies a given driving force to the motor 128 for a certain period of time, and determines the amount of rotation of the motor 128 in the fixed time based on the detection output of the rotary encoder 129. The memory 152 stores a reference value regarding the amount of rotation of the motor 128. The processor 151 determines that the operation of the motor 128 is normal if the difference between the specified rotation amount and the reference value in the memory 152 is less than a certain value, and determines that the operation is abnormal if it is more than a certain value. ..

(8) Syringe non-mounted state detection The processor 151 checks the mounted state of the syringe 10 in the syringe pump 100 as “syringe non-mounted state detection”.

In one implementation example, in the self-test, the Hall element 131 does not detect the magnetic flux of the magnet 132, and the voltage value output by the pressing sensor 140 is 4.0V (voltage corresponding to the pressed state). If it is (value), it is determined that the syringe 10 is attached. On the other hand, when the Hall element 131 detects the magnetic flux of the magnet 132 and the voltage value output by the pressing sensor 140 is lower than 4.0V (voltage value corresponding to the unpressed state). Determines that the syringe 10 is not attached.

When it is preferable that the self-test is performed in a state where the syringe 10 is not attached, the processor 151 determines that the syringe 10 was attached at the start of the self-test, and as will be described later with reference to FIG. A message to that effect may be output.

[Processing flow]
FIG. 13 is a flowchart of the process executed for the control of the syringe pump 100. In the syringe pump 100, the process shown in FIG. 13 may be realized by the processor 151 executing a given program.

In one embodiment, the process of FIG. 13 is started when the syringe pump 100 is connected to a commercial power source and is in a sleep state. The sleep state includes the control unit 150, the sensor for detecting the displacement of the clamp 112 (displacement detection sensor 911, 912), and the sensor for detecting the displacement of the drive unit 120 (displacement detection sensor 921). Means that the power is turned on, but the power is not turned on at least one of the other elements. As will be described later, when the displacement of at least one of the clamp 112 and the drive unit 120 is detected, the syringe pump 100 is started, whereby the starting state is started. In the activated state, the power is also turned on to the element that was not turned on in the sleep state.

In step S10, the syringe pump 100 determines whether the start switch 170 has been operated or whether the displacement of at least one of the clamp 112 and the drive unit 120 has been detected. The syringe pump 100 determines the presence or absence of displacement of the clamp 112 based on the detection outputs from the displacement detection sensor 911 and the displacement detection sensor 912, and the displacement of the drive unit 120 based on the detection output from the displacement detection sensor 921. Judge the presence or absence of.

The syringe pump 100 repeats the control of step S10 at regular intervals until it is determined that the start switch 170 has been operated or the displacement of at least one of the clamp 112 and the drive unit 120 has been detected (step S10). NO). When the syringe pump 100 determines that the start switch 170 has been operated or the displacement of at least one of the clamp 112 and the drive unit 120 has been detected (YES in step S10), the syringe pump 100 proceeds to control to step S12.

In step S12, the syringe pump 100 starts the syringe pump 100. As a result, the syringe pump 100 shifts from the sleep state to the wake-up state.

In step S14, the syringe pump 100 starts a self-test.

In step S16, the syringe pump 100 determines whether or not the self-test has been completed, and if it is determined that the self-test has been completed (YES in step S16), the control proceeds to step S18.

In step S18, the syringe pump 100 displays the result of the self-test on the display 182.

In step S20, the syringe pump 100 executes an operation according to the instruction. The instruction to the syringe pump 100 may be input from the operation panel 180 or may be input from an external device.

In step S22, the syringe pump 100 determines whether or not the start switch 170 has been operated, and if it is determined that the start switch 170 has been operated (YES in step S22), the control proceeds to step S26, and if not (step S22). NO), the control proceeds to step S24.

In step S24, the syringe pump 100 determines whether or not a state has occurred in which the syringe pump 100 has not been operated for a certain period of time or longer. When the syringe pump 100 determines that the condition has not occurred (NO in step S24), the control returns to step S20, and when it is determined that the condition has occurred (YES in step S24), the control proceeds to step S26.

In one embodiment, the "operation" in step S24 includes an operation on the operation panel 180 and movement of the clamp 112 or the drive unit 120. That is, if the user does not operate the operation panel 180, does not move the clamp 112, and does not move the drive unit 120 for a certain period of time or longer, the control proceeds from step S24 to step S26.

In step S26, the syringe pump 100 shifts the state of the syringe pump 100 from the activated state to the sleep state. As a result, the start of the syringe pump 100 is released. After that, the syringe pump 100 returns the control to step S10.

In the process described with reference to FIG. 13, when the user operates the start switch 170 or moves the clamp 112 or the drive unit 120, the syringe pump 100 is started (step S12). The self-test is started (step S14).

FIG. 14 is a diagram showing an example of a screen displaying the result of the self-test. The screen 1200 includes a column 1210 for displaying the result of each item of the self-test and a button 1222.

The syringe pump 100 displays the results of the above-mentioned items (1) to (8) for the self-test in column 1210. More specifically, for the items (1) to (7), the syringe pump 100 displays "OK" as a result if the check result is "normal", and displays "OK" as a result if the check result is "abnormal". "NG" is displayed. Regarding item (8), the syringe pump 100 displays "OK" when it is determined that the syringe 10 is not attached at the start of the self-test, and is determined to be "NG" when it is determined that the syringe 10 is attached. do. In the example of FIG. 14, "OK" is displayed as a result of all the items (1) to (8).

Button 1222 is a button for instructing the re-execution of the self-test. The syringe pump 100 may display the screen 1200 for a specific time after the self-test is completed, and then display other contents on the display 182. As a result, the user can instruct the syringe pump 100 to re-execute the self-test by operating the button 1222 only during the period when the screen 1200 is displayed. When the re-execution of the self-test is instructed, in FIG. 13, the syringe pump 100 returns the control from step S18 to step S14, and starts the self-test again in step S14.

FIG. 15 is a diagram showing another example of a screen displaying the result of the self-test. The screen 1300 includes a column 1310 instead of the column 1210 of the screen 1200. Column 1310 includes the result "NG". More specifically, in column 1310, the result of "(8) Syringe non-attached state detection" is "NG", which means that the syringe 10 was attached at the start of the self-test.

Column 1310 further includes frame 1311. Frame 1311 emphasizes the item whose result was "NG".

FIG. 16 is a diagram showing still another example of a screen displaying the result of the self-test. The screen 1400 further includes a message 1401 indicating that the result of "(8) Syringe non-attached state detection" is "NG". In the syringe pump 100, it may be considered preferable that the self-test is performed in a state where the syringe 10 is not attached. In such a case, the display of the message 1401 allows the user to attach the syringe 10 to the syringe pump 100. You will be prompted to enter an instruction to restart the self-test without it.

[summary]
In the present embodiment described above, the clamp 112 constitutes an example of a holding portion for holding the syringe 10. Further, the drive unit 120 constitutes another example of the holding unit.

When the displacement of at least one of the clamp 112 and the drive unit 120 is detected in the sleep state, the state of the syringe pump 100 is shifted to the start state even if the start switch 170 is not operated. Thereby, the user can start the syringe pump 100 without operating the start switch 170 by displacing the clamp 112 or the drive unit 120 in order to set the syringe 10 in the syringe pump 100.

In the process of FIG. 13, when the syringe pump 100 was started, the self-test was started without requiring the instruction from the user, but after the start, the self-test may be started after waiting for the instruction from the user. good.

The displacement of the clamp 112 in the sleep state may be detected by a sensor other than the displacement detection sensors 911 and 912. More specifically, the displacement detection sensors 911 and 912 may be omitted, and the displacement of the clamp 112 in the sleep state uses the detection output from the sensor (potentiometer 114) for detecting the dimension of the barrel 20. It may be judged. That is, the syringe pump 100 may determine that the clamp 112 is displaced when the output value from the potentiometer 114 changes in the sleep state. In this case, the plates 1121, 1122 may also be omitted.

The displacement of the drive unit 120 in the sleep state may be detected by a sensor other than the displacement detection sensor 921. More specifically, the displacement detection sensor 921 may be omitted, and the displacement of the drive unit 120 in the sleep state is determined by using the detection output of the sensor (potentiometer 126) for detecting the position of the drive unit 120. May be done. That is, the syringe pump 100 may determine that the drive unit 120 is displaced when the output value from the potentiometer 126 changes in the sleep state. In this case, the plate body 120X may also be omitted.

In the present embodiment, it is determined whether or not the syringe 10 is attached to the syringe pump 100 at the start of the self-test based on the detection outputs of the Hall element 131 and the pressing sensor 140 at the start of the self-test, and as a result, it is determined. Is displayed. In this sense, the Hall element 131 and the pressing sensor 140 constitute an example of a holding state detection sensor.

The detection of the presence or absence of pressing by a member such as the second fringe 31 using the pressing sensor 140 is modified so as to be substituted for the detection using the floodlight and the light receiver as described with reference to FIGS. 9 and 10. May be done.

In this modification, a button is provided instead of the pressing sensor 140 on the surface on which the pressing sensor 140 is provided. The button is displaced so as to be housed inside the drive unit 120 by being pressed by a member such as the second fringe 31. Inside the drive unit 120, a plate body that is displaced according to the displacement of the button (storage of the drive unit 120 inside) is provided. A floodlight and a light receiver are further provided inside the drive unit 120.

The relationship between the floodlight, the photoreceiver, and the plate in this modification is the same as the relationship between the floodlight 161 and the photoreceiver 162, and the element 123A in the example described with reference to FIGS. 9 and 10. In this modification, when the button is located outside the drive unit 120 without being pressed, the plate does not block the light emitted from the floodlight. As a result, the light receiver can detect the light emitted from the floodlight. On the other hand, when the button is pressed and accommodated in the drive unit 120, the plate body blocks the light emitted from the floodlight. This makes it impossible for the receiver to detect at least a portion of the light emitted by the floodlight. That is, in this modification, the processor 151 determines whether or not the button is pressed by any member based on the detection output of the light receiver in the state where the light is emitted to the floodlight in the drive unit 120. This makes it possible to determine whether or not a member such as the second fringe 31 is set in the drive unit 120.

It should be considered that each embodiment disclosed this time is exemplary in all respects and is not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims. Further, the inventions described in the embodiments and the modifications thereof are intended to be carried out alone or in combination as much as possible.

10 syringes, 100 syringe pumps, 112 clamps, 120 drives, 131 Hall elements, 132 magnets, 140 pressing sensors, 150 control units.

Claims (5)

A syringe pump having a holding part for holding a syringe.
A displacement detection sensor that detects the displacement of the holding portion, and
Further, a control unit for acquiring the detection output of the displacement detection sensor is provided.
The control unit is configured to start the syringe pump in response to the displacement of the holding unit being detected by the displacement detection sensor. The syringe pump according to claim 1, wherein the control unit is configured to start an operation check of the syringe pump when the syringe pump is started. Further, a holding state detection sensor for detecting that the holding portion is in the holding state for holding the syringe is provided.
The syringe according to claim 2, wherein the control unit notifies a given information in response to the detection that the holding unit is in the holding state by the holding state detection sensor in the operation check. pump. The holding portion includes a first holding portion for holding the barrel of the syringe and a second holding portion for holding the rod of the syringe.
The displacement detection sensor includes a first sensor that detects the displacement of the first holding portion and a second sensor that detects the displacement of the second holding portion.
Any of claims 1 to 3, wherein the control unit is configured to start the syringe pump in response to the displacement being detected by at least one of the first sensor and the second sensor. Or the syringe pump according to item 1. The syringe pump according to any one of claims 1 to 4, wherein the control unit releases the start of the syringe pump in response to not detecting an operation on the syringe pump for a certain period of time.

Images