JP7011505B2 - Syringe pump - Google Patents

Description

The present disclosure relates to syringe pumps and syringes used to deliver a liquid into a living body.

There is known a syringe pump that sends a liquid into a living body of a patient or the like while controlling the flow rate by placing a syringe containing a liquid such as a chemical solution and controlling the speed at which the pusher of the syringe is pushed out. .. In such a syringe pump, if the pusher of the syringe is not fixed for some reason, there is a problem that a siphoning phenomenon may occur in which an excessive amount of liquid is administered to the living body due to the height difference from the living body.

Patent Document 1 describes a syringe pump provided with a pusher gripping detector that detects that the pusher of a syringe is gripped by a mover as a slider.

Japanese Unexamined Patent Publication No. 2005-287944

However, in the syringe pump described in Patent Document 1, a siphoning phenomenon can occur by monitoring the output from the pusher grip detector and detecting that the pusher is not gripped by the slider. It was possible to detect that, but it was not possible to detect that the siphoning phenomenon was actually occurring.

An object of the present disclosure is to provide a syringe pump and a syringe capable of detecting the occurrence of a siphoning phenomenon in view of the above problems.

The syringe pump as the first aspect of the present invention has an outer cylinder, a pusher that can move the hollow portion of the outer cylinder, and a response portion provided on the side surface of the pusher and responding to an electromagnetic wave. A syringe pump capable of sending a liquid contained in the hollow portion of a syringe having a syringe, wherein the syringe can be placed, and the syringe placed in the above-mentioned placement portion. A slider having a pusher fixing portion capable of fixing a pusher and being movable together with the pusher, a pusher fixing detection unit for detecting that the pusher is fixed to the pusher fixing portion, and the above-mentioned With the antenna unit capable of receiving data transmitted from the response unit and the syringe mounted on the above-mentioned placement unit, the pusher fixing detection unit has the pusher fixed to the pusher fixing part. It is provided with a control unit for detecting a change in the communication state between the antenna unit and the response unit when it is detected that the syringe has not been used.

The syringe pump as one embodiment of the present invention includes a plurality of the antenna portions.

The syringe pump as one embodiment of the present invention further includes an outer cylinder fixed detection unit capable of detecting the size of the outer cylinder of the syringe mounted on the above-mentioned placement unit, and the control unit is the control unit. The antenna unit to be operated from the plurality of antenna units is selected according to the size of the outer cylinder detected by the outer cylinder fixing detection unit.

In the syringe pump as one embodiment of the present invention, the control unit operates all of the plurality of antenna units.

In the syringe pump as one embodiment of the present invention, the pusher fixing detection unit has the pusher fixed on the pusher fixing portion while the control unit has the syringe mounted on the above-mentioned placement portion. When the state of detecting that the antenna is not fixed continues for a predetermined time, the first warning is notified, and when the communication state between the antenna unit and the response unit deteriorates, the second warning is different from the first warning. Notify a warning.

The syringe pump as one embodiment of the present invention further includes a liquid feeding stop unit capable of stopping the liquid feeding, and when the control unit deteriorates the communication state between the antenna unit and the response unit, the liquid feeding unit is described. To stop.

The syringe as the first aspect of the present invention includes an outer cylinder, a pusher that can move the hollow portion of the outer cylinder, and a response portion provided on the side surface of the pusher and responding to an electromagnetic wave. ..

According to the syringe pump and the syringe of the present disclosure, the occurrence of the siphoning phenomenon can be detected.

It is a front view of the syringe pump as one Embodiment of this invention. It is a front view of the syringe pump shown in FIG. 1 in the state where a syringe is placed. It is an external perspective view of the syringe shown in FIG. It is a top view of the syringe pump in the state where the syringe is placed. It is a rear view of a syringe pump in a state where a syringe is placed. It is a block diagram of the syringe pump shown in FIG. It is a top view of the syringe pump in the state where the siphoning phenomenon occurs. It is a flowchart which shows the liquid feeding stop processing performed by the syringe pump shown in FIG. It is a flowchart which shows the siphoning phenomenon determination process performed by the syringe pump shown in FIG. It is a top view which concerns on the modification of the syringe pump with the syringe placed.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The same reference numerals are given to the common components in each figure.

[Syringe pump 1]
FIG. 1 is a front view of a syringe pump 1 as an embodiment of the present invention. FIG. 2 is a front view of the syringe pump 1 in a state where the syringe 50 is placed. FIG. 3 is an external perspective view of the syringe 50. FIG. 4 is a top view of the syringe pump 1 in a state where the syringe 50 is placed. FIG. 5 is a rear view of the syringe pump 1 in a state where the syringe 50 is placed. As shown in FIG. 2, the syringe pump 1 is configured as a pump that sends a liquid contained in a hollow portion 52 of a syringe 50.

As shown in FIGS. 1 and 2, the syringe pump 1 includes a main body cover 2. The main body cover 2 is integrally molded with a molded resin material having chemical resistance. As a result, the main body cover 2 has a splash-proof treatment structure. The splash-proof treatment structure can prevent the drug or the like from invading the inside of the syringe pump 1 even if the drug or the like is applied to the syringe pump 1.

As shown in FIGS. 1 and 2, the syringe pump 1 includes a mounting portion 11 on which the syringe 50 can be mounted. As shown in FIG. 2, the syringe 50 that can be placed on the mounting portion 11 is inserted into the hollow portion 52 from the base end side of the outer cylinder 51 and the cylindrical outer cylinder 51 that internally partitions the hollow portion 52. The hollow portion 52 can be moved along the extending direction A of the outer cylinder 51 (hereinafter, simply referred to as "extending direction A") while being in close contact with the inner peripheral surface of the outer cylinder 51 without a gap. It has a syringe 55 and. The outer cylinder 51 has an outer cylinder flange 53 at the base end, and an outlet hole 54 for communicating the hollow portion 52 and the outside is partitioned at the tip. The outlet hole 54 communicates with a flow path 61 partitioned by a flexible tube 60 attached to the tip of the outer cylinder 51. The pusher 55 has a pusher flange 56 at the base end. A liquid such as a chemical solution is contained in the hollow portion 52 of the syringe 50.

As shown in FIG. 3, a response unit 57 is provided on the side surface of the pusher 55 of the syringe 50. The response unit 57 may be provided on the side surface of the pusher 55, for example, by attaching the response unit 57.

The response unit 57 is, for example, an RF tag. The response unit 57 can communicate with the antenna unit 39 (see FIGS. 1 and 2, etc.) described later included in the syringe pump 1 by wireless communication. The response unit 57 can perform wireless communication with the antenna unit 39 by, for example, a communication method having a short communication distance as defined by the international standard ISO15693. When the response unit 57 receives an electromagnetic wave from the antenna unit 39, the response unit 57 responds to the electromagnetic wave and transmits data to the antenna unit 39.

As shown in FIG. 2, the mounting portion 11 can mount the outer cylinder 51 of the syringe 50 in detail. Further, as shown in FIGS. 1 and 2, when the outer cylinder 51 of the syringe 50 is placed on the mounting portion 11, the syringe pump 1 accommodates a part of the outer cylinder flange 53 and holds the outer cylinder 51. A slit 15 for fixing the syringe pump 1 in the extending direction A is provided.

As shown in FIGS. 1 and 2, the syringe pump 1 includes a slider 12. The slider 12 is movable together with the pusher 55 of the syringe 50 mounted on the mounting portion 11. Specifically, the slider 12 is located on the proximal end side of the pusher 55 with respect to the pusher flange 56 of the syringe 50 mounted on the mounting portion 11, and can move along the extending direction A. Further, the slider 12 includes a pusher fixing portion 13. The pusher fixing portion 13 fixes the pusher 55 of the syringe 50 mounted on the mounting portion 11 to the slider main body portion 17 (see FIG. 4). In the present embodiment, the pusher fixing portion 13 holds the pusher flange 56 of the placed syringe 50 between the pusher flange 56 and the slider main body portion 17 other than the pusher fixing portion 13. It can be fixed to the slider main body 17. In a state where the pusher flange 56 is fixed to the slider main body 17 by the pusher fixing portion 13, the pusher 55 moves integrally with the slider 12 as the slider 12 moves along the extending direction A. .. At this time, the outer cylinder 51 mounted on the mounting portion 11 is fixed to the syringe pump 1 in the extending direction A because a part of the outer cylinder flange 53 is housed in the slit 15. Therefore, when the slider 12 moves to the tip end side of the syringe 50, the pusher 55 moves to the tip end side with respect to the outer cylinder 51, and the liquid contained in the hollow portion 52 is discharged from the outlet hole 54. Therefore, the liquid contained in the hollow portion 52 can be sent into the living body through the flow path 61 partitioned by the tube 60.

As shown in FIGS. 1 and 2, the syringe pump 1 includes a syringe clamp 14 as an outer cylinder fixing portion for fixing the outer cylinder 51 of the syringe 50 mounted on the mounting portion 11. In the present embodiment, the syringe clamp 14 can be moved along the direction B orthogonal to the extending direction A, and the outer cylinder 51 of the syringe 50 mounted on the mounting portion 11 is referred to as the mounting portion 11. It is possible to fix it by sandwiching it between them. Further, by fixing the outer cylinder 51 with the syringe clamp 14, a part of the outer cylinder flange 53 is less likely to come off from the slit 15, so that the outer cylinder 51 is firmly fixed to the syringe pump 1.

As shown in FIGS. 1 and 2, the syringe pump 1 is provided with a notch-shaped tube guide portion 16 at a position on the tip end side of the syringe 50 when the syringe 50 is mounted on the mounting portion 11. There is. The tube guide portion 16 is used for positioning by passing the tube 60 mounted on the tip of the syringe 50 in a state where the syringe 50 is mounted on the mounting portion 11.

As shown in FIGS. 1 and 2, the syringe pump 1 is close to the response portion 57 attached to the side surface of the pusher 55 of the syringe 50 in a state where the syringe 50 is mounted on the mounting portion 11. The antenna unit 39 is provided at the position where the antenna unit 39 is installed. The antenna portion 39 may be provided on the main body cover 2, for example.

FIG. 4 is a top view of the syringe pump 1 in which the pusher 55 of the syringe 50 is fixed to the slider 12 and before the slider 12 moves to the tip end side of the syringe 50. As shown in FIG. 4, the antenna portion 39 has a main body so that the pusher 55 of the syringe 50 is fixed to the slider 12 and is close to the response portion 57 before the slider 12 moves toward the tip end side of the syringe 50. It is provided on the cover 2.

FIG. 5 is a view of the antenna portion 39 provided on the main body cover 2 as viewed from the back surface of the syringe pump 1.

FIG. 6 is a block diagram of the syringe pump 1. As shown in FIG. 6, the syringe pump 1 includes a mounting portion 11 described above with reference to FIGS. 1 and 2, a slider 12 having an pusher fixing portion 13, a syringe clamp 14, a slit 15, and a tube guide portion. In addition to 16, the circuit unit 20, the operation input unit 31, the display unit 32, the sound output unit 33, the mounting detection unit 34, the outer cylinder fixed detection unit 35, the slider drive unit 36, and the pusher It includes a fixed detection unit 37, a tube clamp 38, and an antenna unit 39. The circuit unit 20 is located inside the syringe pump 1 and includes a communication unit 21, a timing unit 22, a storage unit 23, and a control unit 24.

The communication unit 21 includes an interface for transmitting / receiving information to / from an information processing device such as an external computer by wireless communication or wired communication.

The timekeeping unit 22 measures the time, ticks the time, and can be realized by, for example, RTC (Real Time Clock). The timekeeping unit 22 may be realized as a function of the control unit 24.

The storage unit 23 is configured to include, for example, a storage device, and stores various information and programs. Specifically, the storage unit 23 stores a program for executing the liquid feeding stop processing and the siphoning phenomenon determination processing executed by the control unit 24. Further, the storage unit 23 drives the slider drive unit 36 to supply the liquid based on the parameter information such as the set value of the flow rate of the liquid sent by the syringe pump 1 and the set value of the dose, and the parameter information. Stores the control program, etc.

The control unit 24 includes a processor that realizes a specific function by reading, for example, specific information and a program stored in the storage unit 23, and controls the operation of the entire syringe pump 1. Specifically, the control unit 24 reads the information and the program stored in the storage unit 23, and executes various processes such as a liquid feeding stop processing, a siphoning phenomenon determination processing, and a liquid feeding processing. Further, the control unit 24 transmits / receives information to / from an external information processing device via the communication unit 21. The control unit 24 executes various processes based on the information input from the operation input unit 31, and outputs the information associated with the execution of the various processes from the display unit 32 and the sound output unit 33.

As shown in FIGS. 1 and 2, the operation input unit 31 is composed of an operation panel as an input interface in which various operation buttons are arranged, and receives an input operation by an operator. The operation buttons arranged on the operation panel as the operation input unit 31 are a power button for switching on / off of the operating power of the syringe pump 1, a start button for starting liquid feeding, and a stop button for stopping liquid feeding. Etc. are included. The operation input unit 31 may be configured to include an input interface such as a touch panel, a keyboard, or a mouse provided integrally with the display unit 32. The operation input unit 31 outputs the input information to the control unit 24.

As shown in FIGS. 1 and 2, the display unit 32 includes a display device such as a liquid crystal display or an organic EL display. Based on the signal from the control unit 24, the display unit 32 has a set value and an actually measured value of the flow rate of the liquid to be sent, a set value and an actually measured value of the dose of the liquid to be sent, various alarm information, and the like. Is displayed.

The sound output unit 33 includes, for example, a speaker, and notifies various alarm information and the like by sound or voice based on the signal from the control unit 24.

As shown in FIGS. 1 and 2, the mounting detection unit 34 is a sensor that is attached to, for example, the mounting unit 11 and detects that the outer cylinder 51 of the syringe 50 is mounted on the mounting unit 11. .. The on-board detection unit 34 outputs the detected information to the control unit 24.

As shown in FIGS. 1 and 2, the outer cylinder fixing detection unit 35 is a sensor that is attached to, for example, a syringe clamp 14 and detects that the outer cylinder 51 of the syringe 50 is fixed by the syringe clamp 14. .. Further, the outer cylinder fixing detection unit 35 can detect the size of the diameter of the outer cylinder 51 of the syringe 50 mounted on the mounting unit 11. The outer cylinder fixed detection unit 35 outputs the detected information to the control unit 24.

The slider drive unit 36 includes, for example, a motor, and moves the slider 12 along the extension direction A (see FIG. 2) based on a signal from the control unit 24.

As shown in FIGS. 1 and 2, the pusher fixing detection unit 37 is attached to, for example, a slider 12, and detects that the pusher 55 of the syringe 50 is fixed to the slider main body 17 by the pusher fixing portion 13. It is a sensor to detect. The pusher fixing detection unit 37 includes, for example, a switch that partially protrudes from the surface of the slider 12 and can be pushed toward the slider 12 in a natural state, and the pusher 55 is attached to the slider main body 17 by the pusher fixing portion 13. When fixed, the switch is pushed toward the slider 12 by the pusher 55 to detect the fixation of the pusher 55. The pusher fixing detection unit 37 outputs the detected information to the control unit 24. If the pusher fixation detection unit 37 does not detect the fixation of the pusher 55, a siphoning phenomenon may occur. That is, the pusher fixation detection unit 37 can detect that the ciphoning phenomenon can occur based on the fact that the pusher fixation detection unit 37 does not detect the fixation of the pusher 55.

As shown in FIGS. 1 and 2, the tube clamp 38 is attached to, for example, the position of the tube guide portion 16 and can sandwich the tube 60. Specifically, the tube clamp 38 has an open state in which the flow path 61 partitioned by the tube 60 passing through the tube guide unit 16 is opened and a closed state in which the flow path 61 is closed, based on a signal from the control unit 24. It is configured to be switchable between states. In other words, the tube clamp 38 is a liquid feeding stop portion that closes the flow path 61 of the tube 60 and stops the liquid feeding from the syringe 50 in the closed state.

The antenna unit 39 can perform wireless communication with the response unit 57 attached to the side surface of the pusher 55 of the syringe 50 by, for example, a communication method having a short communication distance as defined by the international standard ISO15693. The antenna unit 39 can receive the data transmitted from the response unit 57 as a response to the electromagnetic wave transmitted from the antenna unit 39 to the response unit 57. The data transmitted from the response unit 57 includes, for example, an ID for uniquely identifying the response unit 57.

As shown in FIG. 4, in the antenna unit 39, the response unit 57 attached to the side surface of the pusher 55 of the syringe 50 is close to the antenna unit 39, and the response unit 57 faces the antenna unit 39. At that time, wireless communication can be performed with the response unit 57 in a good communication state.

FIG. 7 is a top view of the syringe pump 1 in a state where the siphoning phenomenon is occurring. In the state shown in FIG. 7, the pusher 55 of the syringe 50 is not fixed to the slider 12. Further, the pusher 55 of the syringe 50 is moved away from the slider 12 to the tip end side of the syringe 50. At this time, since the outer cylinder 51 of the syringe 50 is fixed in the extending direction A with respect to the syringe pump 1, the pusher 55 is moving toward the tip with respect to the outer cylinder 51, and the siphoning phenomenon occurs. It has occurred.

When the siphoning phenomenon as shown in FIG. 7 occurs, the pusher 55 of the syringe 50 gradually moves toward the tip end side of the syringe 50, so that the response unit attached to the side surface of the pusher 55 of the syringe 50 57 gradually moves away from the antenna portion 39. As a result, when the response unit 57 is separated from the communicable area of the antenna unit 39, the communication state between the antenna unit 39 and the response unit 57 deteriorates. That is, when the siphoning phenomenon occurs, the communication state between the antenna unit 39 and the response unit 57 changes from a good communication state to a worse communication state. Here, the deterioration of the communication state means that, for example, when the antenna unit 39 receives a response from the response unit 57, the probability of a communication error increases. Therefore, for example, by setting the number of occurrences of a communication error per predetermined unit number as a threshold value, it is possible to determine a change in the communication state. Specifically, when the number of occurrences of communication error is less than the threshold value, it can be determined as a good communication state, and when the number of occurrences of communication error is more than the threshold value, it can be determined as a deteriorated communication state.

In the control unit 24, while the syringe 50 is mounted on the mounting unit 11, the pusher fixing detection unit 37 does not have the pusher 55 of the syringe 50 fixed to the pusher fixing portion 13 of the slider 12. Is detected, it is detected whether there is a change in the communication state between the antenna unit 39 and the response unit 57.

When the siphoning phenomenon actually occurs and the communication state between the antenna unit 39 and the response unit 57 changes, the control unit 24 may stop the liquid feeding of the syringe pump 1. The control unit 24 may stop the liquid feeding by closing the flow path 61 of the tube 60 with the tube clamp 38.

[Siphoning phenomenon judgment processing]
The liquid feeding stop processing including the siphoning phenomenon determination processing performed by the syringe pump 1 will be described with reference to the flowcharts shown in FIGS. 8 and 9.

First, the control unit 24 of the syringe pump 1 determines whether or not the outer cylinder fixing detection unit 35 has detected the fixation of the syringe 50 to the mounting portion 11 of the outer cylinder 51 (step S101). When the control unit 24 determines that the fixation has not been detected (No in step S101), the control unit 24 returns to the process of step S101. On the other hand, if the control unit 24 determines that the fixation is detected (Yes in step S101), the control unit 24 proceeds to step S102. In the present embodiment, the fixation of the outer cylinder 51 to the mounting portion 11 by the syringe clamp 14 is detected, but the mounting detection unit 34 detects the mounting of the outer cylinder 51 on the mounting portion 11. You may.

The control unit 24 determines whether or not the pusher fixation detection unit 37 has detected the fixation of the syringe 50 to the slider 12 (step S102). When the control unit 24 determines that the pusher 55 is fixed to the slider 12 (Yes in step S102), the control unit 24 returns to the process of step S102. On the other hand, when the control unit 24 determines that the pusher 55 is not fixed to the slider 12 (No in step S102), the control unit 24 proceeds to step S103.

In the control unit 24, while the syringe 50 is mounted on the mounting unit 11, the pusher fixing detection unit 37 does not have the pusher 55 of the syringe 50 fixed to the pusher fixing portion 13 of the slider 12. It is determined whether or not the state of detecting is continued for a predetermined time (step S103). When the control unit 24 determines that the time has not continued for a predetermined time (No in step S103), the control unit 24 returns to the process of step S103. On the other hand, when the control unit 24 determines that the time has continued for a predetermined time (Yes in step S103), the control unit 24 notifies the first warning (step S104).

The control unit 24 may notify the first warning by displaying a warning message on the display unit 32, for example. The control unit 24 may notify the first warning by, for example, causing the sound output unit 33 to output a warning sound. As a result, the control unit 24 can notify the operator of the syringe pump 1 that the siphoning phenomenon can occur.

The control unit 24 starts the siphoning phenomenon determination process (step S105). When the control unit 24 determines No in step S102, the control unit 24 may proceed to the siphoning phenomenon determination process (step S105) in parallel with proceeding to step S103, not after executing steps S103 and S104.

When the control unit 24 starts the siphoning phenomenon determination process, it first monitors the change in the communication state between the antenna unit 39 and the response unit 57 (step S201). That is, the control unit 24 monitors whether or not the probability of communication error changes when the antenna unit 39 receives a response from the response unit 57.

When the change in the communication state between the antenna unit 39 and the response unit 57 is not detected (No in step S202), the control unit 24 returns to the process of step S201. On the other hand, when the change in the communication state between the antenna unit 39 and the response unit 57 is detected (Yes in step S202), the control unit 24 determines that the siphoning phenomenon has occurred (step S203). The antenna phenomenon determination process is terminated.

When the control unit 24 determines that the siphoning phenomenon has occurred as a result of the siphoning phenomenon determination process (step S203), the control unit 24 notifies a second warning different from the first warning (step S106).

The control unit 24 may notify the second warning by displaying a warning message on the display unit 32, for example. The control unit 24 may notify the second warning by, for example, causing the sound output unit 33 to output a warning sound. As a result, the control unit 24 can notify the operator of the syringe pump 1 that the siphoning phenomenon has occurred.

The control unit 24 may notify the second warning as a warning having a higher warning level than the first warning. For example, when the display unit 32 is notified of the first warning and the second warning, the control unit 24 displays the first warning on a screen with a yellow background and the second warning on a screen with a red background. It may be displayed. Alternatively, the control unit 24 may blink the screen when displaying the second warning. In this way, by displaying the second warning with a stronger visual appeal to the operator than the first warning, the control unit 24 causes a siphoning phenomenon for the operator of the syringe pump 1. It is possible to more strongly notify what is being done.

Further, for example, when the sound output unit 33 is notified of the first warning and the second warning, the control unit 24 may make the volume of the second warning louder than that of the first warning. In this way, by making the second warning a sound that appeals to the operator's hearing more strongly than the first warning, the control unit 24 causes a siphoning phenomenon for the operator of the syringe pump 1. It is possible to more strongly notify what is being done.

The control unit 24 stops the liquid feeding by closing the flow path 61 of the tube 60 with the tube clamp 38 (see FIG. 2 and the like) (step S107), and ends the liquid feeding stop process.

As described above, in the syringe pump 1 of the present embodiment, in the state where the outer cylinder 51 of the syringe 50 is fixed to the mounting portion 11, the pusher fixing detection unit 37 has the pusher 55 attached to the pusher fixing portion 13. When it is detected that the antenna unit is not fixed, it is possible to detect a change in the communication state between the antenna unit 39 and the response unit 57. Therefore, the occurrence of the siphoning phenomenon can be detected.

Further, in the syringe pump 1 of the present embodiment, when the outer cylinder 51 of the syringe 50 is not fixed to the mounting portion 11, or the pusher fixing detection portion 37 has the pusher 55 fixed to the slider 12. When it is detected, the detection of the change in the communication state between the antenna unit 39 and the response unit 57 is not started, so that unnecessary detection can be avoided.

The syringe pump 1 detects that the outer cylinder 51 of the syringe 50 is not fixed to the mounting portion 11, or the pusher fixing detection unit 37 detects that the pusher 55 is fixed to the slider 12. Even in this case, the detection of the change in the communication state between the antenna unit 39 and the response unit 57 may be started. In this case, even if the control unit 24 of the syringe pump 1 detects a change in the communication state between the antenna unit 39 and the response unit 57, it does not determine that the siphoning phenomenon has occurred.

(Modification example)
FIG. 10 is a top view showing a state in which the syringe 50 is placed on the syringe pump 1a according to the modified example.

The syringe pump 1a according to the modified example includes a plurality of antenna portions, that is, an antenna portion 39A, an antenna portion 39B, and an antenna portion 39C. The antenna portion 39A, the antenna portion 39B, and the antenna portion 39C may be provided on the main body cover 2 so as to be arranged along the extending direction A.

The syringe 50 can have syringes of various sizes. For example, the syringe 50 can be small, medium, and large in size. The small, medium, and large syringes 50 have different diameters of the outer cylinder 51. Further, the small, medium, and large syringes 50 have different lengths along the extending direction A, respectively.

The syringe pump 1a is provided with an antenna portion 39A at a position close to the response portion 57 attached to the side surface of the pusher 55 of the small syringe 50 in a state where the small syringe 50 is placed.

The syringe pump 1a is provided with an antenna portion 39B at a position close to the response portion 57 attached to the side surface of the pusher 55 of the medium-sized syringe 50 in a state where the medium-sized syringe 50 is placed.

The syringe pump 1a is provided with an antenna portion 39C at a position close to the response portion 57 attached to the side surface of the pusher 55 of the large syringe 50 in a state where the large syringe 50 is placed.

When the syringe 50 is placed on the mounting unit 11, the outer cylinder fixing detection unit 35 of the syringe pump 1a detects the size of the diameter of the outer cylinder 51 of the syringe 50 and outputs the detected information to the control unit 24. do.

The control unit 24 of the syringe pump 1a determines whether the syringe 50 is small, medium, or large according to the size of the diameter of the outer cylinder 51 of the syringe 50 detected by the outer cylinder fixing detection unit 35. .. The control unit 24 selects which of the antenna unit 39A, the antenna unit 39B, and the antenna unit 39C is to be operated according to the size of the syringe 50.

When the syringe 50 is small, the control unit 24 selects the antenna unit 39A as the antenna unit to be operated. When the syringe 50 is medium-sized, the control unit 24 selects the antenna unit 39B as the antenna unit to be operated. When the syringe 50 is large, the control unit 24 selects the antenna unit 39C as the antenna unit to be operated.

As described above, the syringe pump 1a includes a plurality of antenna portions, that is, an antenna portion 39A, an antenna portion 39B, and an antenna portion 39C, and has the size of the diameter of the outer cylinder 51 of the syringe 50 detected by the outer cylinder fixing detection unit 35. Depending on which antenna unit is to be operated, it is selected. This makes it possible to execute the siphoning phenomenon determination process shown in FIG. 9 for syringes 50 of various sizes.

Further, the control unit 24 of the syringe pump 1a does not select and operate any one of the antenna unit 39A, the antenna unit 39B, and the antenna unit 39C, but the antenna unit 39A, the antenna unit 39B, and the antenna unit 24B. You may operate all the antenna part 39C.

The control unit 24 can grasp the movement or position of the pusher 55 of the syringe 50 in more detail by operating the antenna unit 39A, the antenna unit 39B, and the antenna unit 39C. For example, when the control unit 24 detects the transition from the state A to the state B shown below from the antenna unit 39A, the antenna unit 39B, and the antenna unit 39C, the response unit 57 antennas from a position close to the antenna unit 39B. It can be grasped that the pusher 55 has moved so as to move to a position close to the portion 39A.
<State A>
The communication condition between the antenna unit 39A and the response unit 57 is poor. The communication condition between the antenna unit 39B and the response unit 57 is good. The communication condition between the antenna unit 39C and the response unit 57 is poor.
The communication condition between the antenna unit 39A and the response unit 57 is good. The communication condition between the antenna unit 39B and the response unit 57 is poor. The communication condition between the antenna unit 39C and the response unit 57 is poor.

As described above, since the response unit 57 is provided on the side surface of the pusher 55 of the syringe 50, the control unit 24 of the syringe pump 1 or the syringe pump 1a can grasp the movement or position of the pusher 55 in detail. Can be done.

The present invention is not limited to the configuration specified in each of the above-described embodiments, and various modifications can be made without departing from the gist of the invention described in the claims. For example, the functions included in each component and each step can be rearranged so as not to be logically inconsistent, and a plurality of components and steps can be combined or divided into one. Is.

Further, in the syringe pump 1 of the present embodiment, the tube clamp 38 is used as the liquid feeding stop portion, but as long as the liquid feeding from the syringe 50 can be stopped, other means may be used. good.

Further, in the syringe pump 1 of the present embodiment, when a change in the communication state between the antenna unit 39 and the response unit 57 is detected, the liquid feeding is stopped, but the liquid feeding is not stopped and the second liquid is not stopped. You may just notify the warning of.

The present disclosure relates to a syringe pump used to deliver a liquid into a living body.

1, 1a: Syringe pump 2: Main body cover 11: Mounting part 12: Slider 13: Pusher fixing part 14: Syringe clamp 15: Slit 16: Tube guide part 17: Slider main body part 20: Circuit part 21: Communication part 22: Timekeeping unit 23: Storage unit 24: Control unit 31: Operation input unit 32: Display unit 33: Sound output unit 34: Mounting detection unit 35: Outer cylinder fixed detection unit 36: Slider drive unit 37: Pusher fixed detection Part 38: Clamp for tube (liquid supply stop part)
39, 39A, 39B, 39C: Antenna part 50: Syringe 51: Outer cylinder 52: Hollow part 53: Outer cylinder flange 54: Outlet hole 55: Pusher 56: Pusher flange 57: Response part 60: Tube 61: Flow path A: Extension direction of the outer cylinder of the placed syringe B: Movable direction of the syringe clamp

Claims (6)

A liquid contained in the hollow portion of a syringe having an outer cylinder, a pusher that can move the hollow portion of the outer cylinder, and a response portion that is provided on the side surface of the pusher and responds to an electromagnetic wave is sent. It is a syringe pump that can liquid
A mounting unit on which the syringe can be mounted and a mounting portion
A slider having a pusher fixing portion capable of fixing the pusher of the syringe placed on the above-mentioned placement portion and movable together with the pusher,
A pusher fixing detection unit that detects that the pusher is fixed to the pusher fixing portion,
An antenna unit that can receive data transmitted from the response unit, and
When the syringe is mounted on the above-mentioned resting portion and the pusher fixing detection portion detects that the pusher is not fixed to the pusher fixing portion, the antenna portion and the antenna portion are used. A syringe pump including a control unit for detecting a change in a communication state with the response unit. In the syringe pump according to claim 1,
A syringe pump including the plurality of antenna portions. In the syringe pump according to claim 2,
Further provided with an outer cylinder fixing detection unit capable of detecting the size of the outer cylinder of the syringe mounted on the above-mentioned placement portion.
The control unit is a syringe pump that selects the antenna unit to be operated from a plurality of the antenna units according to the size of the outer cylinder detected by the outer cylinder fixing detection unit. In the syringe pump according to claim 2,
The control unit is a syringe pump that operates all of the plurality of antenna units. In the syringe pump according to any one of claims 1 to 4.
The control unit
When the syringe is mounted on the above-mentioned resting portion and the pusher fixing detection portion detects that the pusher is not fixed on the pusher fixing portion for a predetermined time, the first step is made. Notify the warning of 1 and
A syringe pump that notifies a second warning different from the first warning when the communication state between the antenna unit and the response unit deteriorates. In the syringe pump according to any one of claims 1 to 5.
Further provided with a liquid feeding stop portion capable of stopping the liquid feeding,
The control unit is a syringe pump that stops the liquid feeding when the communication state between the antenna unit and the response unit deteriorates.

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