WO2011068098A1

WO2011068098A1 - Drug solution injection system

Info

Publication number: WO2011068098A1
Application number: PCT/JP2010/071359
Authority: WO
Inventors: 茂根本
Original assignee: 株式会社根本杏林堂
Priority date: 2009-12-01
Filing date: 2010-11-30
Publication date: 2011-06-09
Also published as: JP5770638B2; JPWO2011068098A1

Abstract

Disclosed is a system wherein injection conditions can easily be set, the timing of a scan start of a CT device, etc., need not be adjusted, and complicated operations are not required for inspection. The control means of the system calculates the amount of drug solution (remaining amount) currently in a syringe (200), displays on a display (51) a selection button (71a) for selecting one of multiple candidate drug solution injection durations determined in advance, determines the drug solution injection duration selected from among the candidate durations by pressing the selection button, determines a drug solution injection speed on the basis of the determined drug solution injection duration and a planned injection amount, which is the calculated drug solution amount or less, and controls a piston driving mechanism (13) to inject the aforementioned planned injection amount at the determined drug solution injection speed.

Description

Chemical injection system

The present invention relates to a chemical solution injection system for injecting a contrast medium or the like into a subject, and in particular, the injection conditions can be easily set, and it is not necessary to adjust the scan start timing of a CT apparatus or the like, which is complicated to the examination. The present invention relates to a chemical solution injection system that does not require a lot of work.

At present, CT (Computed Tomography) scanner, MRI (Magnetic Resonance Imaging) apparatus, PET (Positron) as medical diagnostic imaging equipment.
Emission Tomography) devices are known. When using such an imaging apparatus, a subject may be injected with a contrast medium, physiological saline, or the like (hereinafter, also simply referred to as “medical solution”). Conventionally, various injectors (injection heads) that automatically execute this injection have also been proposed.

Such an injection head generally has a piston drive mechanism having a drive motor and a slider mechanism, and a syringe holding part to which a syringe is mounted, and operates the piston drive mechanism to push in a piston member of the syringe. Thus, the drug solution in the syringe is pushed out toward the subject.

Conventionally, in contrast agent injection, in order to improve the contrast effect and reduce waste of contrast agent, injection conditions based on the imaging part (eg, head, chest) and the weight of the subject Is set (for example, see Patent Document 1).

JP 2004-248734 A

In the system of Patent Document 1, a section such as a head or a chest (referred to as “body classification”) is first selected on a display, and then a part such as a lung or heart that is a lower item of the body classification (“imaging”). The injection condition is set by selecting (referred to as “part”) (in addition, the body weight of the subject is input if necessary). According to such a system, it is possible to easily set optimal injection conditions for each subject, and it is possible to reduce the waste of contrast medium.

However, in such a method in which the injection conditions are set based on the injection amount and the injection speed, generally, a different chemical solution injection time is set for each subject. As a result, the peak time of TDC (Time Density Curve) varies. When fluctuations occur in the TDC peak time in this way, it is necessary to adjust the scan start timing of the CT apparatus or the like, which complicates the inspection and increases the inspection time.

Further, in the system of Patent Document 1, it is necessary to select a body division and an imaging region in detail for setting the conditions, and setting work is relatively troublesome. Therefore, a system that can set injection conditions (can start injection) with a simpler procedure has been desired.

The present invention has been made in view of the above problems, and its purpose is to enable easy setting of injection conditions, and to eliminate the need for adjustment of the scan start timing of a CT apparatus, etc. The object is to provide a chemical solution injection system which is not required.

The chemical injection system of the present invention for solving the above problems is
An injection head having a piston drive mechanism, a touch panel type display, and a control means for controlling the operation of the injection head while displaying a predetermined image on the display; A chemical injection system for injecting,
The control means includes
A process of calculating the amount of the chemical solution (remaining amount) contained in the syringe;
A process for displaying a selection button for selecting one of a plurality of predetermined drug solution injection time candidates on the display;
A process of determining one of the candidate times selected by pressing the selection button as a drug solution injection time;
A process of determining a chemical solution injection speed based on the determined chemical solution injection time and a planned injection amount equal to or less than the calculated chemical solution amount;
A process for controlling the piston drive mechanism to inject the planned injection amount at the determined chemical injection speed;
It is characterized by performing.

According to the present invention, a doctor or the like selects an injection time (for example, 30 seconds, 60 seconds, and 90 seconds) on the display, and the chemical solution is injected at the injection time. It is not necessary to adjust the scan start timing. Further, it is not necessary to finely adjust the injection speed and set the injection time (for example, to finely adjust the injection speed so that the injection time is 30 seconds).

The present invention may further be as follows.
The scheduled injection amount is the total amount of the chemical solution in the syringe.

The control means further performs a process of displaying a weight selection button for selecting a weight category of the subject on the display,
The scheduled injection amount is an amount calculated based on the weight category selected by pressing the weight selection button.

The control means further performs a process of causing the display to display a schematic image (plural) of the subject's body section,
When one of the schematic images of the body section is pressed, a set of candidate drug injection times corresponding to the body section is displayed on the display, and one of the candidate times in this set is displayed by pressing the selection button. Is selected.

As the scheduled injection amount, a first mode for injecting the entire amount of the chemical solution in the syringe;
The control means further performs processing for displaying a weight selection button for selecting a weight category of the subject on the display, and pressing the weight selection button as the scheduled injection amount A second mode of injecting an amount calculated based on the selected weight category is switchable.

The control means further comprises:
In order to release air to fill the tube with a chemical solution, a process for operating the piston drive mechanism is performed,
In the process of calculating the amount of chemical liquid (remaining amount) contained in the syringe, the amount of chemical liquid after the air bleeding operation is calculated.

In the process of calculating the amount of chemical liquid (remaining amount) contained in the syringe, the remaining amount is calculated using at least information on the position of the drive rod of the piston drive mechanism.

The control means includes
A check button on the display or on the injection head is pressed,
Next, when a start button on the display or the injection head is pressed, a chemical injection operation is started.

The chemical solution injection system further includes means for reading information from an information storage medium attached to the syringe.

As the weight selection button,
A plurality of weight indicator buttons corresponding to weight categories are displayed on the display.

As described above, according to the present invention, there is provided a chemical solution injection system in which injection conditions can be easily set, and it is not necessary to adjust the scan start timing of a CT apparatus or the like and does not require complicated work for inspection. Can be provided.

It is a perspective view which shows the chemical | medical solution injection | pouring system of one form of this invention. It is a perspective view which shows an injection | pouring head and the syringe mounted in it. It is a block diagram of the chemical injection system of FIG. It is a figure which shows the state by which the product of the syringe etc. were displayed on the display. It is a figure which shows the state by which the candidate of injection | pouring time was displayed on the display. It is a figure which shows the state after one of several indicators is selected on the screen of FIG. It is a figure for demonstrating the other image displayed on a display. It is a figure for demonstrating the other image displayed on a display. It is a figure for demonstrating another image displayed on a display. It is a figure for demonstrating another image displayed on a display. It is a figure for demonstrating the selection procedure in the case of imaging a cardiac system. It is a figure which shows the example of the image in the case of imaging a cardiac system.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the chemical solution injection system 1 of this embodiment includes an injection head 10 supported by a movable stand, and a controller 50 with a display connected to the injection head 10.

As shown in FIG. 2, the injection head 10 is of a two-cylinder type capable of mounting a syringe 200 </ b> A filled with a contrast medium and a syringe 200 </ b> B filled with physiological saline. As the syringe, a conventionally known prefilled type in which a piston member 220 is slidably inserted into a cylindrical cylinder member 210 can be used.

The injection head 10 has two piston drive mechanisms 13 for pushing the piston member 220 of each syringe 200. Each piston drive mechanism 13 has a drive arm that moves forward and backward in the front-rear direction, a drive motor that is a drive source, a slider mechanism, and the like. Each piston drive mechanism 13 has a built-in load cell (detailed below), and detects the force pressing the piston member 220 with this load cell.

Two concave syringe holding portions 14 for holding the syringe are provided in front of the upper surface of the injection head 10. The syringe holder 14 is provided with an IC tag reader (not shown) (not shown) for reading information on the IC tag 25 attached to the syringe.

A plurality of buttons 15 a to 15 c are provided on the upper surface of the injection head 10. The button 15a is a check button for enabling the chemical liquid injection, the button 15b is a start button for starting the chemical liquid injection, and the button 15c is a button for stopping the injection operation.

In this example, an IC tag 25 is attached to the syringe, and information related to the syringe (syringe identification data (for example, lot number), cylinder member pressure resistance, cylinder member inner diameter, piston member Stroke etc.) and information (name (product name), component information such as iodine amount, viscosity, expiry date, etc.) of the chemical solution filled in the syringe are stored.

The display 51 of the controller 50 shown in FIG. 1 is of a touch panel type, and an image for determining a chemical injection condition is displayed on the display 51 so that the operator can select the image by touching the image. ing.
The display 51 also displays information on the chemical solution in each syringe, information on the injection pressure of the chemical solution during the injection of the chemical solution (force to push the piston member), and the like.

Hereinafter, the block configuration of the medicinal liquid injection system 1 will be described with reference to FIG.
As shown in FIG. 3, the injection head 10 has two piston drive mechanisms 13, a load cell 16, and two IC tag readers 17. The controller 50 includes a control unit 61 that performs processing for displaying a predetermined image on the display 51. The control unit 61 also performs a process of accepting an image selection by the operator through the touch panel 52.

The control unit 61 is connected to the injection head 10 and controls the operation of each piston drive mechanism 13 of the injection head 10. Moreover, the control part 61 performs the process which displays the detection result of the load cell 16 of the injection | pouring head 10, and displays the pressure of a chemical | medical solution (or the force which presses a piston member) on the display 51 based on it.

Further, the control unit 61 performs processing for displaying information on the syringe 200 read from the tag reader 17 of the injection head 10 on the display 51. The image displayed on the display 51 will be described later in detail with reference to other drawings.

In the storage unit 63 of the controller 50 shown in FIG. 3, for example, an algorithm such as a calculation formula for setting injection conditions, a chemical solution injection protocol (an injection protocol in which the horizontal axis is time and the vertical axis is the injection speed) Are stored.
The controller 50 is provided with a slot (not shown) into which a predetermined storage medium is inserted. Various information stored in the storage medium (for example, information on contrast agents, information on injection conditions, and subjects) Information etc.) may be read by the control unit 61. Alternatively, the controller 50 may be connected to a predetermined network (not shown), and predetermined information may be read via this network. In addition, the result of chemical | medical solution injection | pouring may be transmitted outside via a network.

The operation of the chemical injection system of the present embodiment configured as described above will be described below while showing an example of a specific image displayed on the display 51.

First, the doctor selects the syringe 200 to be mounted on the injection head 10. Specifically, the doctor first determines the amount of iodine in consideration of the subject's weight, imaging region, injection pattern (details below) and the like. Next, based on this, the type and amount of contrast medium to be injected (for example, 100 ml, 150 ml, etc.) are determined, and an appropriate one is selected from a plurality of syringes (products) prepared in advance. For example, when it is determined that the amount of iodine to be injected is 30 g, a syringe filled with 100 ml of a contrast medium having an iodine concentration of 300 mg I / ml is selected.

The above “injection pattern” means that, for example, in a two-cylinder apparatus as shown in FIG. 1, the contrast medium is injected first and then the physiological saline is injected, or the physiological saline is injected first. This refers to the order of injection, such as whether to inject the contrast agent, and of course (other patterns are possible).

All the syringes prepared in advance are prefilled type syringes, and as an example, those having iodine concentrations of 240 mgI / ml, 300 mgI / ml, 320 mgI / ml, 350 mgI / ml, and 370 mgI / ml are prepared. In the present embodiment, as will be described later, the entire amount of the chemical solution in the syringe is basically injected.

The selected syringe 200 is then mounted on the injection head 10.
In addition, although it does not specifically limit about the physiological saline, As an example, a doctor selects one suitable syringe similarly to the case of a contrast agent, and it is mounted in the injection | pouring head 10. FIG.

When the syringe is mounted, the IC tag reader 17 of the injection head 10 reads information on the IC tag 25 of the syringe. The read information (for example, the product name of the contrast medium in the syringe, the amount of contrast medium in the syringe, and the pressure resistance of the syringe) is displayed in a window 88 of the display 51 as shown in FIG. In this example, the amount of contrast medium is 100 ml, and the pressure resistance of the syringe is 15 kgf / cm ² . In addition, when the product name information is displayed in this way, the doctor can check whether the correct syringe (contrast medium) is mounted by looking at the display.

In the upper right corner of the screen of the display 51, an image button 81 labeled “Check” is displayed, and below that is the amount of drug solution for each syringe (in this example, 100 ml of contrast medium and 60 ml of physiological saline). ) Is displayed. The “check” image may not function as a button, which will be described later.

After that, the air bleeding operation is performed by a conventionally known operation. Specifically, in response to a command from the control unit 61 (see FIG. 3), the piston drive mechanism is operated, a small amount of drug solution is pushed out from the syringe containing the contrast agent, and then from the syringe containing the physiological saline. Similarly, a small amount of chemical solution is pushed out, and the tube is filled with the chemical solution.

In the state after this air venting, the drive rod (not shown) of the piston drive mechanism has advanced a predetermined distance from the initial position. The control unit 61 uses the information on the position of the drive rod (more specifically, information on the shape of the syringe read from the IC tag 25 is also used), and the amount of chemical solution (residual amount) in the syringe after the air check is used. Amount). When the calculated result is, for example, 99 ml, the display of the image 82 (see FIG. 5) on the display is also “99 ml”.

In the state shown in FIG. 5, a window 71 is displayed in the approximate center of the screen, and one selection button 71 a for selecting one of a plurality of drug solution injection time candidates is displayed in the window 71. . Characters (candidate times) of “30 seconds”, “60 seconds”, and “90 seconds” are displayed on the right side of the selection button 71a.

A bar-shaped indicator 71b is displayed below the characters “30 seconds”. Each time the selection button 71a is pressed, the indicator 71b sequentially moves to the characters “60 seconds” and “90 seconds”, and when the button is pressed again, it returns to the characters “30 seconds”. .

FIG. 6 shows a state where “30 seconds” is selected as the candidate time. “30 sec” is also displayed inside the button 71a to indicate that 30 seconds have been selected. Note that “30 seconds” is selected, for example, when a blood vessel is imaged.

When the injection time is selected in this way, the contrast agent injection speed is then determined based on the remaining amount of the contrast agent in the syringe (99 ml) and the selected injection time (30 sec). In this example, 99 ml / 30 seconds = 3.3 ml / sec.

As described above, the process of displaying the selection button 71a and the like on the display 51, the process of determining the time as one of the candidate liquid injection times when one of the candidate times is selected, and the liquid injection speed as described above The determining process is performed by the function of the control unit 61.

Next, as shown in FIG. 6, the display 51 displays a chart 74 showing a chemical solution injection protocol (the horizontal axis is time, and the vertical axis is the injection speed). In this chart 74,

condition bar images

74a and 74b representing the contrast medium injection condition and physiological saline injection condition are displayed, respectively. In each

condition bar image

74a, 74b, the length in the horizontal direction represents the injection time, and the position in the vertical direction represents the injection speed.

Specifically, in the injection protocol of the example in FIG. 6, as shown in the condition bar image 74a, first, 99 ml of contrast medium is injected at a speed of 3.3 ml / sec over 30 seconds (the whole amount in the syringe is injected), and then As shown in the

condition bar image

74b, 30 ml of physiological saline is injected at a rate of 3.3 ml / sec for about 9 seconds.

In the state of the screen in FIG. 6, an image button 83 that displays “total injection” is displayed on the right side of the screen (below the image 82 that displays the amount of each drug solution). Below that, an image 84 that displays the iodine concentration of the contrast medium in the mounted syringe and an image 85 that displays the set pressure limit value are displayed.

Regarding the pressure limit value, information on the IC tag 25 (see FIG. 2) of the syringe may be read, and an upper limit value of pressure resistance (pressure limit value) may be automatically set based on the information. It may be set by, for example. Specific examples have been set doctor for example, "20 kg / cm ^2", when the limit value of the syringe read from the IC tag 25 is "15 kg / cm ^2", pressure limit value is automatically It may be set (corrected) to “15 kg / cm ² ”.

Next, in order to actually start the injection of the chemical liquid from the state of FIG. Then, a “start” image (not shown) is displayed on the display, and the image is pressed. Thereby, the operation of the piston drive mechanism 13 of the syringe containing the contrast agent is started, and the injection of the contrast agent is started. The contrast agent is injected until the entire amount of the medical solution in the syringe is injected, and then the injection of physiological saline for flushing is started.
In addition to the above configuration, one or both of the “check” image button and the “start” image button described above are provided as physical buttons on the injection head (button 15a in FIG. 2). 15b) The injection may be started by pressing these buttons. Alternatively, such a button may be provided on the hand switch 57 (see FIG. 1) connected to the controller 50.

After completion of the injection of physiological saline, the image on the display 51 of the controller 50 may return to the setting screen (see FIG. 5), or the screen at the end of the injection may be maintained as it is. Good.

According to the drug solution injection system of the present embodiment as described above, a doctor selects a syringe to be mounted on an injection head from a plurality of syringes prepared in advance based on the weight of the subject, an imaging region, etc. After the syringe is mounted on the injection head, the injection of the chemical solution is started in only two steps: (i) selecting an injection time on the display 51, and then (ii) pressing a predetermined button for starting the injection. can do. Therefore, there is no need to set the contrast agent injection speed and amount as in the conventional case, and the injection conditions can be set very easily.

Further, according to the configuration of the present embodiment, since the chemical solution injection conditions are set so that the entire amount of the syringe is injected, the contrast agent can be used without waste.

In the configuration of the present embodiment, basically, the injection time is selected from the candidate times of 30 seconds, 60 seconds, and 90 seconds (example), so that the injection time is constant, and the TDC peak time is also constant. Therefore, it is not necessary to adjust the scan start timing of the CT apparatus or the like. In addition, when the TDC peak time is constant in this way, it is advantageous in that contrast with good reproducibility can be performed.

Although one embodiment of the present invention has been described above, the chemical injection system of the present invention may be more specifically as follows.

First, as shown in FIG. 6, a numeric keypad image 72 is provided in the right corner (one example) of a window 71 for selecting an injection time. When this image 72 is pressed, the injection time is manually adjusted as shown in FIG. A window 77 for inputting may be developed. In this window 77, an arbitrary injection time (for example, 45 seconds) can be input using the numeric keypad 77a or the “+/−” key 77b, whereby the injection time can be set in more detail.

As for the amount of the chemical solution, as shown in FIG. 8 (explained by taking physiological saline as an example), “+” key 78a and “−” key 78b are respectively displayed above and below the condition bar image 74b. The injection amount may be finely adjusted by pressing.

Further, when the IC tag 25 is not provided on the syringe, an image button 96 for setting a pull-down contrast medium concentration as shown in the screen of FIG. 10 is provided. The agent concentration: 240 mg I / ml, 300 mg I / ml, 320 mg I / ml, 350 mg I / ml, 370 mg I / ml) may be selected to set a predetermined concentration.

In addition, regarding the setting of the pressure limiter of the piston drive mechanism, using the value of the injection rate (3.3 ml / sec in the above example, see FIG. 6) determined in the above step of setting the chemical injection conditions, The pressure limiter value may be automatically set.

Also, regarding the image displayed on the display, in order to prevent an input error when setting the injection conditions, it is possible to use different colors for each related item. For example, “green” may be used for images and characters related to the contrast medium, and “blue” may be used for images and characters related to the physiological saline. By being color-coded in this way, mistakes in setting can be prevented.

In the above embodiment, the example in which the display 51 and the control unit 61 (control means) are provided in the controller 50 has been described. However, the present invention is not limited to this, and an injection head, a display, a control means, and the like. May be provided integrally, or may be provided separately for each of one or more of these elements.

In the present invention, the “selection button” means a button for selecting a predetermined candidate (for example, an injection time candidate of 30 seconds, 60 seconds, 90 seconds, etc.). The buttons may be displayed separately from the candidate image buttons (for example, buttons corresponding to 30 seconds, 60 seconds, and 90 seconds), or the candidate image buttons themselves are used as selection buttons. It may function.

In the present invention, as shown in FIG. 9, a weight input window 90 is displayed on the screen of the display 51 so that the liquid injection conditions (particularly the amount of liquid to be injected) can be changed according to the body weight of the subject. It may be. In this window 90, there are provided

weight selection buttons

91a, 91b, 91c (weight indicator buttons) representing small, medium and large body shapes, and by pressing these buttons, a weight classification of the subject is input. Accordingly, the injection amount of the chemical solution is changed.
The classification of the

weight selection buttons

91a, 91b, 91c is not particularly limited, but may be set to 49 kg, 66 kg, 66 kg or more, for example.

As an example, when the weight selection button 91a is pressed, the amount of the liquid to be injected is determined to be 90 ml (one example), and based on the determined liquid amount (90 ml) and the selected injection time (30 seconds). The chemical solution injection speed is determined (in this case, 3.0 ml / sec). Next, the control unit controls the piston drive mechanism to inject the calculated amount of the chemical solution (90 ml) at the determined chemical solution injection speed (3.0 ml).

Even with such a configuration, since the injection is performed at the selected fixed injection time (30 seconds in this example), the peak time of the TDC is also constant, and the scan start of the CT apparatus or the like is performed as in the above embodiment. Timing adjustment is not necessary.

Further, with respect to the input of the body weight, as shown in FIG. 9, a numeric keypad image 92 similar to the numeric keypad image 72 (see FIG. 6) for finely adjusting the injection time is provided. A more detailed subject weight may be input using a numeric keypad.

As one form of the chemical injection system of the present invention, there are a mode (second mode) in which an amount calculated based on such a subject weight classification is injected, and the total amount of the chemical in the syringe as described above. The mode (first mode) in which injection is performed may be switchable.

This switching may be performed by pressing a switching button displayed on the display, or may be performed by pressing a physical button provided in the controller 50 or the like. Good.

The procedure and method of contrast medium injection may be different for each hospital (that is, a doctor using the system, etc.). When the two modes can be switched in this way, the procedure and method of each hospital This is advantageous in that it can be suitably handled.

As another function, the chemical injection device of the present invention determines whether or not the value of the injection rate exceeds a predetermined upper limit (for example, 5.0 ml / sec) when the chemical injection rate is calculated. In the case of exceeding, it may have a function of issuing a warning or disabling chemical injection. This upper limit value may be a value read from the IC tag of the syringe.

Although one embodiment of the present invention has been described above, the present invention is naturally not limited to a two-cylinder injection head, and can be applied to a single-cylinder injection head. Moreover, the chemical | medical solution injection | pouring system in which air bleeding operation is not performed may be sufficient.

Further, as shown in FIG. 11, even if the human body image 101 displayed on the display is made up of schematic images of a plurality of body sections, and the schematic images of each body section function as buttons. Good. In FIG. 11, for example, the image 101a represents the head, the image 101b represents the chest, and the image 101c represents the abdomen. As an example, when the chest image 101b is selected, a set 103 (14 seconds and 17 seconds in this example) of drug solution injection times corresponding to this section (chest) is displayed on the display.

Specifically, the chest image 101b means that the heart system (coronary artery or arteriovenous) is imaged. When imaging the heart system in this way, “22.2 mg I / kg / sec” is displayed as an example at the iodine amount display 84. This indicates the amount of iodine per body weight and per unit time. In the case of the heart system, unlike other organs (such as the kidney), the iodine amount is determined in consideration of not only “per body weight” but also “per unit time” (ie, 1 kg of body weight per second) The amount of iodine required per hit).
With respect to the iodine amount expressed in this way, the operator presses (i) the button 71a to select one of the chemical injection times (for example, 14 seconds) as in the above embodiment, and (ii) the weight classification By selecting one of the buttons 91a-91c (eg 49 kg), the total iodine amount to be injected is calculated and the amount of contrast agent to be injected is determined.

As described with reference to FIG. 11, the

schematic images

101a, 101b, 101c, etc. of the body sections can be selected, and a set of drug solution injection time candidates corresponding to the selected body sections (for example, the heart System: 14 seconds, 17 seconds / abdomen: 30 seconds, 60 seconds, 90 seconds, etc.), the injection time suitable for each body segment will be selected. A good imaging effect. Further, in the case of the heart system as in the example of FIG. 11, when the amount of iodine is determined in consideration of not only per body weight but also per unit time, the contrast of the heart system is better. It is preferable at the point which can be performed.

Note that when imaging the heart system, a screen as shown in FIG. 12 may be displayed. FIG. 12 shows a state in which the chest image 101b is selected. An image 93a for setting the weight of the subject, an image 93b for setting the concentration of the contrast agent, and an image 93c for setting the injection time. Is displayed.

In this example, “60 kg” is displayed in place of the image 93a (weight). By pressing the image 93a, for example, a numeric keypad (not shown) appears, whereby the weight value can be finely adjusted. Also, “300 (mgI / ml)” is displayed in the image 93b (contrast medium), but this value can be changed by selecting another option (not shown) that appears when the image 93b is pressed. can do. In addition, although “0:15 (sec)” is displayed at the image 93c (time), this numerical value indicates a predetermined image (not shown) for time adjustment that appears by pressing the image 93c. It can be changed by pressing.

In the example of FIG. 12, an image 93d displayed as “+ α” is displayed next to the image 93c (time). By pressing the image 93d, a predetermined time (for example, about 2 to 5 seconds) set in advance is added to the injection time.

DESCRIPTION OF SYMBOLS 1 Chemical solution injection system 10 Injection head 13 Piston drive mechanism 25 IC tag 50 Controller 51 Display 71a-71c Injection time selection indicator 74 Chart 91a-91c Weight selection button 200 Syringe

Claims

An injection head having a piston drive mechanism, a touch panel type display, and a control means for controlling the operation of the injection head while displaying a predetermined image on the display; A chemical injection system for injecting,
The control means includes
A process of calculating the amount of the chemical solution (remaining amount) contained in the syringe;
A process for displaying a selection button for selecting one of a plurality of predetermined drug solution injection time candidates on the display;
A process of determining one of the candidate times selected by pressing the selection button as a drug solution injection time;
A process of determining a chemical solution injection speed based on the determined chemical solution injection time and a planned injection amount equal to or less than the calculated chemical solution amount;
A process for controlling the piston drive mechanism to inject the planned injection amount at the determined chemical injection speed;
A chemical solution injection system characterized by performing.
The chemical solution injection system according to claim 1, wherein the planned injection amount is a total amount of the chemical solution in the syringe.
The control means further performs a process of displaying a weight selection button for selecting a weight category of the subject on the display,
The medicinal solution injection system according to claim 1, wherein the scheduled injection amount is an amount calculated based on a weight category selected by pressing the weight selection button.
The control means further performs a process of causing the display to display a schematic image (plural) of the subject's body section,
When one of the schematic images of the body section is pressed, a set of candidate drug injection times corresponding to the body section is displayed on the display, and one of the candidate times in this set is displayed by pressing the selection button. The drug solution injection system according to any one of claims 1 to 3, wherein one is selected.
A first mode for injecting the total amount of the drug solution in the syringe as the planned injection amount;
The control means further performs processing for displaying a weight selection button for selecting a weight category of the subject on the display, and pressing the weight selection button as the scheduled injection amount A second mode for injecting a calculated amount based on the selected weight category;
The chemical injection system according to claim 1, which is switchable.
The control means further comprises:
In order to release air to fill the tube with a chemical solution, a process for operating the piston drive mechanism is performed,
The chemical injection system according to any one of claims 1 to 5, wherein in the process of calculating the amount (remaining amount) of the chemical contained in the syringe, the amount of the chemical after the air bleeding operation is calculated.
The process of calculating the amount (remaining amount) of the chemical liquid contained in the syringe calculates the remaining amount using at least information on a position of a drive rod of a piston drive mechanism. The chemical injection system according to Item.
The control means includes
A check button on the display or on the injection head is pressed,
8. The chemical solution injection system according to claim 1, wherein a chemical solution injection operation is started when a start button on the display or the injection head is pressed.
further,
The drug solution injection system according to any one of claims 1 to 8, further comprising means for reading information from an information storage medium attached to the syringe.
As the weight selection button,
The medicinal-solution infusion system according to claim 3, wherein a plurality of weight indicator buttons corresponding to weight categories are displayed on the display.