JP2003220136A - Medicine-injecting device, syringe adapter, injection head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a medicine-injecting device which can use a plurality of kinds of syringes having different outer shapes in the same manner, and can automatically identify the plurality of kinds of syringes. <P>SOLUTION: Since dedicated syringe adapters 107 are prepared for each of a plurality of kinds of syringes 200, various kinds of syringes 200 can be fitted in one injection head 101 in the same manner. The identification data of the syringes 200 is recorded on the syringe adapter 107, and the injection head 101 detects the identification data from the syringe adapter 107. Therefore, the syringes 200 which are originally manufactured at respective companies can be automatically identified. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drug solution injector for injecting a drug solution in a syringe into a subject, and more particularly to a drug solution injector in which a syringe is attached to an injection head via a syringe adapter.

[0002]

2. Description of the Related Art CT (C
The omputed tomography scanner is capable of taking a tomographic image of the subject by the application of radiography.
An I (Magnetic Resonance Imaging) apparatus can capture a tomographic image of a subject in real time by the magnetic resonance effect, and an angio apparatus can capture a blood vessel image of the subject by applying X-ray imaging.

When using the above-mentioned device, a medical liquid such as a contrast medium or physiological saline may be injected into a subject, and a medical liquid injection device for automatically performing this injection has been put into practical use. When using such a chemical injection device,
The cylinder part of the syringe filled with the drug solution is connected to the subject by an extension tube, and the cylinder part is held by the injection head. Since the piston portion of the syringe held in this manner is moved by the motor-driven slider mechanism, the drug solution is injected into the subject and aspirated if necessary.

[0004] Syringes include a prefilled syringe that is filled with a dedicated drug solution at the time of shipment and a disposable syringe that is filled with an optional drug solution at a medical site. In normal medical sites, accidents are prevented in order to prevent accidents. The correspondence between the syringe and the drug solution is one-to-one.

Therefore, in the chemical liquid injector disclosed in "USP 5,383,858" and Japanese Patent No. 2544571, various data of the syringe are recorded on the peripheral surface of the piston portion by bar codes, and the injection head is surrounded by the periphery of the piston portion. Various data of the syringe is detected from the barcode on the surface.

[0006]

However, the drug solution injector of the above publication is basically applicable only to a prefilled syringe, and is difficult to be applied to a disposable syringe filled with an arbitrary drug solution at a medical site. Further, since it is necessary to individually attach a barcode to the syringe by sticking a seal or the like, the productivity of the prefilled syringe which is a disposable product is deteriorated and the cost is increased.

In addition, although various syringes are currently sold by each company, in order to support the technology of the above publication, each company needs to add a barcode to the syringe as a unified standard at the time of shipment, which is realistic. Not. Further, it is not practical to record all the various data of the syringe with a barcode because the amount of data becomes huge.

The present invention has been made in view of the above problems, and it is possible to uniformly use a plurality of types of syringes having different outer shapes, and to automatically identify the plurality of types of syringes. An object of the present invention is to provide a chemical injection device that can be used.

[0009]

The chemical liquid injector of the present invention has at least a plurality of types of syringe adapters and one injection head, and a plurality of types of syringes are respectively injected via dedicated syringe adapters. It is detachably attached to the head. However, identification data for each type of syringe is recorded in the syringe adapter, and the injection head detects the identification data from the attached syringe adapter. Therefore, when the syringe is attached to the injection head via the syringe adapter, the syringe is identified by the injection head.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. Chemical liquid injector 1 of the present embodiment
00 is formed on the assumption that it will be used near the MRI apparatus 300 as shown in FIG. 5, and as shown in the figure and FIG. 3, the injection head 101 is attached to the apparatus main body 102 by the stand 103. ing.

An arm 104 is attached to the side of the apparatus main body 102, and an injection head 101 is attached to the tip of this arm 104. As shown in FIG. 1 and FIG. 1, the injection head 101 has a semi-cylindrical groove-shaped holder portion 106 formed on the upper surface thereof, and the syringe 200 can be detachably attached to the holder portion 106 via a syringe adapter 107. Be attached to.

More specifically, in the present embodiment, a dedicated syringe 200 is prepared for each of a plurality of types of chemical liquids. However, since the plurality of types of syringes 200 have various outer shapes, the syringe head 100 of the injection head 101 is provided with one. Can not be installed. However, in this embodiment, a plurality of types of syringes 200
Since a dedicated syringe adapter 107 is prepared for each, a plurality of types of syringes 200 are uniformly attached to the holder portion 106 of the injection head 101 by the syringe adapter 107.

The syringe 200 comprises a cylinder portion 201 and a piston portion 202, and the piston portion 202 is slidably inserted into the cylinder portion 201. A cylinder flange 203 is formed at the end of the cylinder portion 201, and a piston flange 2 is formed at the end of the piston portion 202.
04 are formed.

As shown in FIGS. 1 and 2, the syringe adapter 107 is curved in a U shape and has a reinforcing rib 1 on the bottom surface.
It has a main body portion 111 in which 10 is formed, and this main body portion 111 holds the cylinder portion 201 of the syringe 200. A grip portion 112 that grips the cylinder flange 203 of the syringe 200 is formed at the end of the main body portion 111, and engagement portions 114 that engage with the recess 113 of the injection head 101 are formed on both sides of the main body portion 111. Has been done.

The engaging portion 11 of the syringe adapter 107
As shown in FIG. 2, convex portions 115 are formed on at least a part of four predetermined positions on the bottom surface of the syringe 4 as shown in FIG. The identification data of is recorded.

In the recess 113 of the injection head 101, as shown in FIG.
As shown in FIG. 4, pressing switches 116 are arranged as syringe detecting means at four locations corresponding to the convex portions 115 of the syringe adapter 107.
Detects the presence or absence of the convex portion 115 individually. Push switch 1
Reference numeral 16 is a simple mechanical switch that outputs a signal when pressed by the convex portion 115, and is made of a non-magnetic material.

Further, as shown in FIG. 4 and FIG. 4, a slider mechanism 118 having an ultrasonic motor 117 as a drive source is formed behind the holder portion 106 of the injection head 101, and the slider mechanism 118 is formed. Piston flange 2
Hold 04 and slide.

The slider mechanism 118 has a built-in load cell 119 made of a non-magnetic material such as phosphor bronze alloy. The load cell 119 transmits an electric signal corresponding to the stress with which the slider mechanism 118 presses the piston portion 202. Occur.

In the chemical injection device 100 of this embodiment, as shown in FIG. 3, an operation panel 121 is provided on the upper part of the main body 102 of the device.
And a liquid crystal display 122, and a processor unit 123 is built in the apparatus main body 102. The processor unit 123 functions as various means for integrally controlling each part of the chemical liquid injector 100 by executing various processing operations according to a computer program.

For example, when the syringe 200 is mounted on the injection head 101 via the syringe adapter 107, the processor unit 123 has four pressing switches 1
The identification data of the syringe 200 is detected from the output signal of 16. In addition, the processor unit 123 is the syringe 2
Various data of 00 are recorded for each identification data,
As described above, when the identification data of the syringe 200 is detected from the output signal of the press switch 116, various data of the syringe 200 is read by the identification data and the data is displayed on the liquid crystal display 122.

Further, when the processor unit 123 detects that the syringe 200 is mounted on the injection head 101 from the output signal of the press switch 116, the load cell 11 is returned to the initial state in which the ultrasonic motor 117 is not operating.
Obtain and hold the electrical resistance of 9.

After this acquisition is completed, the operation panel 121
When a predetermined operation is performed, the ultrasonic motor 117 of the slider mechanism 118 is driven to slide the piston portion 202 of the syringe 200. At this time, the processor unit 123 acquires the electric resistance of the load cell 119 in real time, and calculates the pressure of the chemical liquid as a pressure detecting means from the difference between the electric resistance and the electric resistance held in the initial state.

However, even if the stress acting on the load cell 119 is the same, since the pressure of the chemical liquid differs depending on the inner diameter and sliding resistance of the syringe 200, the viscosity of the chemical liquid, etc., the processor unit 123 uses the various data of the syringe 200 read out. The inner diameter value is acquired, and the pressure of the drug solution is calculated according to the various data. Further, when the pressure of the chemical liquid is calculated in real time in this way, the processor unit 123 generates a time-dependent graph of pressure in real time and displays it on the liquid crystal display 122 as pressure display means.

The chemical liquid injector 100 according to the present embodiment.
Is used near the imaging unit 301 of the MRI apparatus 300 as shown in FIG.
0 control unit 302. The control unit 302 is a computer system, which controls the operation of the imaging unit 301 and displays a tomographic image.

[Operation of Embodiment] In the case of using the liquid medicine injection device 100 of the present embodiment with the above-mentioned configuration, the operator selects an appropriate syringe 200 corresponding to the liquid medicine to be injected into the subject. , MRI the syringe 200
An extension tube is connected to a subject located in the imaging unit 301 of the apparatus 300 (not shown).

Next, a dedicated syringe adapter 112 is prepared for the syringe 200, and the syringe adapter 112 is attached to the cylinder portion 201 of the syringe 200 as shown in FIG. Then, by mounting this syringe 200 on the injection head 101 together with the syringe adapter 112, the cylinder portion 201 is held by the holder portion 106 and the piston portion 202 is attached to the slider mechanism 11.
8 to hold.

At this time, as shown in FIG. 2, the projection 115 located at at least one of the four prescribed positions of the syringe adapter 112 presses at least one of the four pressing switches 116 of the injection head 101. Therefore, as shown in FIG. 6, the output signal of the press switch 116 is acquired by the processor unit 123 of the apparatus main body 102 as identification data of the syringe 200 (step S1).

Then, the processor unit 123
Retrieves and holds various data of the syringe 200 from the database with the input identification data (step S2,
S3), at least a part of the various data is stored in the device body 1
No. 02 liquid crystal display 122 is displayed (step S4).

Since the liquid crystal display 122 displays the name of the drug solution, the capacity of the syringe 200, etc.,
The operator can confirm that the appropriate syringe 200 is attached. Then, when the operator who confirms this inputs the injection start to the operation panel 121 of the apparatus main body 102 (step S5), the processor unit 123
Load cell 1 without operating ultrasonic motor 117
The electric resistance of 19 is acquired and held (steps S6, S
7).

When this is completed, the processor unit 1
Since 23 operates the ultrasonic motor 117 (step S8), the slider mechanism 118 slides the piston portion 202 of the syringe 200, and the drug solution in the syringe 200 is injected into the subject. At this time, the processor unit 123 acquires the electric resistance of the load cell 119 in real time (step S9), and based on the difference between the electric resistance and the electric resistance held in the initial state, the chemical liquid corresponding to the inner diameter value of the syringe 200 or the like. Calculates the pressure of (step S
10).

Further, from this pressure, the processor unit 123 generates a time-lapse graph in real time and displays this time-lapse graph on the liquid crystal display 122 (step S12). Then, the chemical liquid injector 100 of the present embodiment is
When the completion of injection of the chemical liquid is detected from the stroke of the slider mechanism 118 (step S13), the ultrasonic motor 117
Drive is stopped to return to the initial state (step S1
4).

When the detected pressure of the chemical reaches the predetermined upper limit pressure (step S11), the processor unit 12
3 forcibly stops the driving of the ultrasonic motor 117 (step S15), and displays an error guidance such as "The above pressure has been generated, please check the syringe etc." on the liquid crystal display 122 (step S16).

[Effects of the Embodiment] In the chemical liquid injector 100 of the present embodiment, since the dedicated syringe adapter 107 is prepared for each of the plurality of types of syringes 200,
Injection head 1 for a plurality of types of syringes 200 having various outer shapes
01 can be evenly attached.

Moreover, although the syringe 200 is prepared for each of a plurality of types of chemical liquids, when the syringe 200 is attached to the injection head 101 by the syringe adapter 107, the identification data of the syringe 200 is automatically detected. The operator does not need to input the identification data of the syringe 200 to the operation panel 121.

Furthermore, the identification data of the syringe 200 can be detected by the pressing switch 116 of the injection head 101 detecting the convex portions 115 formed at least at a part of the four prescribed positions of the syringe adapter 107, which is simple. The structure can reliably detect the identification data of the syringe 200.

In particular, since the identification data of the syringe 200 is recorded in the convex portion 115 on the repeatedly used syringe adapter 107, the convex portion 115 is basically formed on the syringe 200 which is disposable and manufactured by a plurality of manufacturers. You don't have to force yourself. Moreover, since the convex portion 115 and the press switch 116 do not disturb the magnetic field unnecessarily, the identification data of the syringe 200 can be detected without adversely affecting the MRI apparatus 300.

Further, the syringe 200 is identified by the identification data.
Since various kinds of data are automatically searched and displayed, the operator can easily confirm whether the syringe 200 mounted on the injection head 101 is appropriate, and a medical accident in which the syringe 200 of an unsuitable drug solution is used. Can be satisfactorily prevented.

When the syringe 200 is a disposable type that is not a prefilled type, the chemical injection device 100 identifies and displays that the mounted syringe 200 is disposable. But,
If various data of the liquid medicine filled in the syringe 200 at the medical site is registered in the database of the processor unit 123, the syringe 2 can be displayed on the liquid crystal display 122.
00 is disposable, and various data of the filled chemical liquid can be displayed.

Further, since the pressure of the drug solution to be injected into the subject is automatically calculated in accordance with the read various data of the syringe 200, the pressure can be detected properly though indirectly. it can. Furthermore, the syringe 200
Since the load cell 119 made of a non-magnetic material detects the stress that presses the piston portion 202, the pressure of the drug solution to be injected is detected from the stress. Therefore, the pressure sensor is not provided inside the syringe 200, and The pressure of the drug solution can be detected without unnecessarily disturbing the magnetic field. Moreover, since the pressure of the drug solution thus detected is displayed in real time as a graph over time, the operator can confirm the state of the pressure of the drug solution injected into the subject in real time.

[Modifications of Embodiment] The present invention is not limited to this embodiment, and various modifications are allowed without departing from the scope of the invention. For example, although it has been assumed in the present embodiment that the liquid injector 100 is used near the MRI apparatus 300, it may be used near a CT scanner or angio apparatus.

Further, in this embodiment, the syringe adapter 10
7 is formed with projections 115 at least at a part of four locations, and the presence or absence of the projections 115 is determined by the four pressing switches 116
It has been assumed that the syringe 200 can be identified up to “2 ⁴ −1 = 15” types by detecting with the above method, but the numerical value can be increased or decreased as necessary.

Further, in the present embodiment, the fact that the syringe 200 is attached to the injection head 101 is also detected by the output signal of the pressing switch 116, so that the convex portions 115 are formed at least at a part of the four positions of the syringe adapter 107. Illustrated. However, if the mounting of the injection head 101 can be detected by a means different from the pressing switch 116, the convex portion 115
It is also possible to use the syringe adapter 107 in which none of them is formed, or it is possible to directly attach the syringe 200 to the injection head 101 without using the syringe adapter 107.

Further, in this embodiment, one syringe 200 is attached to one holder portion 106 of the injection head 101 via one syringe adapter 107, but as shown in FIG. It is also possible to mount a plurality of syringes 200 on a plurality of holder portions 402 of the head 401 via a plurality of syringe adapters 107.

In this case, if the type of the syringe 200 to be attached to each of the plurality of holder portions 402 is specified, the structure is devised so that only the specific syringe adapter 107 is attached to each of the plurality of holder portions 402. The syringe 200 that is not suitable for the holder part 402
Can be prevented from being attached.

If the number of types of syringes 200 to be mounted is different for each of the plurality of holder parts 402, the number of positions at which the convex parts 115 of the syringe adapter 107 are formed and the number of the holder parts 402 are different according to the number. It is preferable to adjust the number of push switches 116.

Further, in the present embodiment, in order to generate the identification data of the syringe 200, the convex portion 115 is formed on the syringe adapter 107 and the press switch 116 is mounted on the injection head 101, but the syringe 20 is used.
Various structures can be implemented as a structure for generating 0 identification data.

For example, as shown in FIG.
5 can be formed on the bottom surface of the reinforcing rib 110 of the syringe adapter 501, or can be formed on the outer peripheral surface of the main body portion 110 of the syringe adapter 502 as shown in FIG. It can be formed on the bottom surface or the front surface (not shown).

Further, the presence or absence of the convex portions 115 at a plurality of positions of the syringe adapter 107 is detected by an optical sensor of the injection head. As shown in FIG. 9 (a), the syringe adapter 503 is used.
The presence or absence of through-holes 504 at a plurality of positions in the engaging portion 114 is detected by a reflective photosensor (not shown) of the injection head. As shown in FIG. The presence or absence of through holes 506 at a plurality of positions is detected by a transmissive photocoupler (not shown) of the injection head, and the presence or absence of these through holes 504, 506 is detected by the pressure switch 116 of the injection head 101. Etc. are also possible.

Further, as shown in FIG. 10, the bar code 508 or the two-dimensional code provided by direct printing or sticking on the outer surface of the syringe adapter 507 is read by the code reader of the injection head, and is provided on the outer surface of the syringe adapter. Reading the color pattern with the color sensor of the injection head, reading the reflection pattern formed on the outer surface of the syringe adapter with the optical sensor of the injection head, reading the magnetic stripe formed on the outer surface of the syringe adapter with the magnetic head of the injection head, The character string attached to the outer surface of the syringe adapter is used for the OCR (Optical Charact
It is also possible to read with a device.

Further, as shown in FIG. 11, the presence or absence of the magnet 510 at a plurality of positions of the syringe adapter 509 and the polarity pattern are detected by the Hall element of the injection head.
It is also possible to detect the resonance frequency of the natural resonance circuit built in the syringe adapter by the frequency detection circuit of the injection head. When using the magnet in this way, there is a concern that the MRI apparatus 300 may be adversely affected.
It is suitable for a scanner.

In addition, ROM (Read
Only memory), flash memory, and other data storage media such as IC (Integrated Circuit) chips
It is also possible to read the data with the microcomputer of the injection head. In the case where a rewritable data storage medium is built in the syringe adapter, when a disposable type for filling an arbitrary drug solution at a medical site is used as the syringe 200, various data of the drug solution are stored in a syringe adapter microcomputer by an injection head microcomputer. It is also possible to store in a data storage medium.

Further, in this embodiment, the slider mechanism 118 causes the piston portion 20 of the syringe 200 to move by the load cell 119.
Although it has been illustrated that only the stress for pressing 2 is detected and converted into the injection pressure of the chemical liquid, for example, the stress that pulls out the piston portion 202 by the slider mechanism 118 in the load cell 119 may be detected and converted into the suction pressure of the chemical liquid. It is possible.

Further, in the present embodiment, it is exemplified that various data of the syringe 200 are retrieved from the identification data of the syringe 200 automatically detected by the chemical injection device 100 and used for data display and calculation of the pressure of the chemical. , It is also possible to use it for only one of them, and it is also possible to use the identification data for other purposes. For example, the MRI apparatus 30
It is also possible to record the identification data of the syringe 200 automatically detected by the liquid injector 100 when automatically recording the work content of the medical procedure together with the date and time data by the control unit 302 of 0 and the like. .

The various means referred to in the present invention may be formed so as to realize their functions. For example, dedicated hardware for exerting a predetermined function, a predetermined function is given by a computer program. The data processing device, a predetermined function realized by the computer program in the data processing device, a combination thereof, and the like may be used.

Further, the various means referred to in the present invention need not be independent of each other, but a plurality of means are formed as one device, and some means are part of other means. It is also possible that a part of a certain means and a part of another means overlap.

[0056]

In the drug solution injector of the present invention, identification data for each type of syringe is recorded in the syringe adapter, and the injection head detects the identification data from the attached syringe adapter. The identification data of the syringe mounted on the injection head can be automatically detected.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a syringe is mounted on an injection head by a syringe adapter in the liquid medicine injection device according to the embodiment of the present invention.

FIG. 2 is a perspective view showing an appearance of a syringe adapter.

FIG. 3 is a perspective view showing the external appearance of a chemical injection device.

FIG. 4 is a block diagram showing a circuit structure of a chemical injection device.

FIG. 5 is a perspective view showing the external appearance of the MRI apparatus.

FIG. 6 is a flowchart showing a processing operation of the chemical liquid injector.

FIG. 7 is a perspective view showing a state in which a syringe is attached to an injection head by a syringe adapter in the first modification of the chemical liquid injector.

FIG. 8 is a perspective view showing the appearance of first and second modified examples of the syringe adapter.

FIG. 9 is a perspective view showing an appearance of third and fourth modified examples of the syringe adapter.

FIG. 10 is a perspective view showing the appearance of a fifth modification of the syringe adapter.

FIG. 11 is a perspective view showing the appearance of a sixth modification of the syringe adapter.

[Explanation of symbols]

100 chemical injection device 101,401 Injection head 107 syringe adapter 115 Convex part that serves as syringe identification means 116 Push switch as syringe detection means 123 Main CPU that functions as various means 200 syringes 201 Cylinder part 202 Piston part 300 MRI device

Claims (8)

[Claims] 1. At least a plurality of types of syringe adapters and one injection head are provided, and a plurality of types of syringes are detachably attached to the injection head via the dedicated syringe adapters for each of the injection heads. The head is a drug solution injecting device for injecting at least a drug solution of the syringe into a subject, and the syringe adapter is provided with a syringe identifying means in which identification data for each type of the syringe is recorded, and the injecting head is A drug solution injector provided with syringe detection means for detecting the identification data from the syringe identification means of the syringe adapter. 2. A database means in which various data of the syringe are recorded for each identification data, and a data reading means for reading various data of the syringe from the database means with the identification data detected by the syringe detection means. The drug solution injector according to claim 1, further comprising a data display unit that displays various data of the read syringe. 3. The injection head is also provided with a direct detection means for detecting that a specific syringe is directly attached without going through the syringe adapter, and the data reading means is provided with the direct detection means. The chemical liquid injection device according to claim 2, wherein various data of the specific syringe is read from the database means corresponding to the detection result of. 4. A pressure detecting means for detecting the pressure of the liquid medicine injected from the syringe into the subject in correspondence with various data of the syringe, and the pressure detected by the pressure detecting means as a graph over time in real time. 4. The chemical liquid injector according to claim 1, further comprising a pressure display unit displayed on the display. 5. The syringe adapter has a convex portion formed on at least a part of a plurality of predetermined positions as the syringe identification means, and the injection head serves as the syringe detection means at the predetermined position of the syringe adapter. The drug solution injector according to claim 1, further comprising a pressing switch that individually detects the presence or absence of the convex portion at each of a plurality of corresponding predetermined positions. 6. The syringe adapter is provided with a magnet at each of a plurality of predetermined positions as the syringe identifying means, and the injection head serves as the syringe detecting means by individually polarity of the plurality of magnets of the syringe adapter. 5. A Hall element for detecting is provided in the device.
The drug solution injector according to any one of 1. 7. At least a plurality of types of syringe adapters and one injection head are provided, and a plurality of types of syringes are detachably mounted in the recesses of the injection head via the dedicated syringe adapters for each of them. A syringe adapter in which the injection head injects at least the drug solution of the syringe into a subject, wherein syringe identification means in which identification data for each type of the syringe is recorded is provided. 8. At least a plurality of types of syringe adapters and one injection head are provided, and a plurality of types of syringes are detachably mounted in the recesses of the injection head via the dedicated syringe adapters for each. A drug solution injector for injecting at least the drug solution of the syringe into a subject, wherein the injector head is provided with syringe detection means for detecting identification data for each type of the syringe from the syringe adapter.