JP6817644B2 - Injection device and control device for injection device - Google Patents

Description

The present invention relates to an injection device for injecting a drug solution, and relates to a stirring injection device for stirring the drug solution in a mounted syringe.

As a chemical solution used for imaging with a medical imaging device, for example, an ultrasonic diagnostic apparatus, there is a contrast agent composed of a suspension. This contrast agent contains microbubbles, solid particles, etc. to scatter ultrasonic waves. Then, when making an ultrasonic diagnosis, a syringe filled with this contrast medium is attached to an injection device, and an image is taken after the contrast medium is injected into the patient's body. The ultrasonic diagnostic apparatus takes an image of the inside of the body by analyzing ultrasonic waves incident on and reflected by microbubbles or solid particles. However, after the syringe is attached to the injection device, the contrast medium may be separated, and the concentration of the contents of the contrast medium may be biased.

Therefore, Patent Document 1 discloses an injection system for maintaining a suspension in a syringe of an injection device in a sufficiently agitated state. This injection system is an injection system for treating a patient by injecting a suspension of microparticles in an aqueous liquid carrier. The injection system then comprises a syringe capable of filling the barrel with the suspension and an automatic electrically driven means that moves in a controllable manner to inject the suspension into the patient. The injection system also has a stirring means that holds the syringe in the system and stirs the microparticles in the suspension. This stirring means maintains the uniformity of the suspension by preventing the separation of fine particles due to gravity or buoyancy due to the movement given to the syringe.

More specifically, Patent Document 1 discloses a roller in contact with the syringe barrel in order to give continuous rotation to the syringe barrel as a stirring means. The roller holds the syringe placed on the roller and rotates the held syringe. This allows the roller to stir the suspension in the barrel of the syringe. Further, Patent Document 1 discloses two brackets that support a syringe in a rotatable manner as a stirring means. These brackets then hold the syringe and rotate the syringe. This causes the bracket to stir the suspension in the barrel of the syringe.

Japanese Patent No. 3665566

However, in the injection system disclosed in Patent Document 1, when the syringe is held by placing it on a roller, the syringe may easily shift and come off from the injection device. Also, when the bracket holds the tip portion of the syringe, the held syringe is likely to shift when an impact is applied.

In order to solve the above problems, the injection device according to the present invention is an injection device for injecting a chemical solution, and fixes and holds a drive unit for pushing out the chemical solution from a syringe filled with the chemical solution and the syringe. A holding unit, a support member for supporting the holding unit, and a stirring unit connected to the holding unit and swinging the holding unit are provided, and the drive unit is from a hollow motor and the hollow motor. It has a conversion mechanism that converts rotary motion into linear motion.

As a result, since the syringe is fixed and held in the holding unit, it is possible to prevent the syringe from shifting during the stirring operation.

Further, the control device as another example of the present invention includes a first driving unit that pushes out the first chemical solution from a first syringe filled with the first chemical solution, and the second syringe filled with the second chemical solution. 2 A control device for an injection device including a second drive unit that pushes out the chemical solution, and obtains an injection amount of the second chemical solution according to a tube connected to the first syringe and pushes out the first chemical solution. After that, the second drug solution is injected in the injection amount, and the second drive unit is controlled so as to boost the first drug solution and stop it in the tube.

As a result, it is possible to reduce the difference between the timing at which the drug solution is injected into the body and the timing at which the injection device starts injection, and it is possible to suppress deterioration in image quality.

Further features of the present invention will become apparent from the description of the following examples exemplified by reference to the accompanying drawings.

It is a schematic perspective view of the injection device. It is a schematic perspective view which shows the 1st and 2nd drive part and a stirring unit. It is the schematic sectional drawing of the 1st and 2nd drive part and the stirring unit. It is the schematic sectional drawing of the front side rotating member. It is a schematic perspective view which shows the 1st holding unit, 1st drive part and agitating unit. It is a schematic perspective view which shows the lever drive part. It is the schematic sectional drawing of the 1st holding unit and 1st drive part. It is a schematic block diagram of the injection device which concerns on 1st Embodiment. It is a schematic block diagram explaining the injection situation of the chemical solution which concerns on 2nd Embodiment. It is a flowchart of boosting injection which concerns on 2nd Embodiment.

Hereinafter, exemplary embodiments for carrying out the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative positions of the components, etc. described in the following embodiments are arbitrary and can be changed according to the configuration of the device to which the present invention is applied or various conditions. Further, unless otherwise specified, the scope of the present invention is not limited to the embodiments specifically described below. In this specification, up and down correspond to the upward direction and the downward direction in the direction of gravity, respectively. Further, the side on which the syringe of the injection head is mounted is the front side, and the side opposite to the front side is the rear side.

[First Embodiment]
FIG. 1 is a schematic perspective view of an injection device (injector) 100 used when photographing the inside of a patient with a medical imaging device, for example, an ultrasonic diagnostic device. As shown in FIG. 1, the injection device 100 for injecting a drug solution includes an injection head 1 on which a first syringe 91 and a second syringe 92 are mounted. Further, the injection device 100 includes a first holding unit 11 that fixes and holds the first syringe 91, and a pair of first support members 14 that support the first holding unit 11.

The injection device 100 further includes a second holding unit 12 that fixes and holds the second syringe 92, and a pair of second support members 15 that support the second holding unit 12. Further, the injection head 1 is provided with a touch panel 13 that functions as a display unit and an operation unit. Then, the injection head 1 displays an operation button, a data input form, a graph, predetermined data, and the like on the touch panel 13. The injection head 1 can also display predetermined data or the like on a portable display, a tablet computer, or the like. These devices may be wirelessly or wiredly connected to the injection head 1 in accordance with standards such as Bluetooth (registered trademark), Wi-Fi, Ethernet (registered trademark) or USB, and may replace the display unit or operation unit of the injection head 1. it can. Further, instead of the touch panel 13, a display as a display unit and an input button as an operation unit may be provided.

The first syringe 91 is filled with a contrast medium which is a suspension as the first chemical solution. Further, the second syringe 92 is filled with physiological saline as a second chemical solution. These chemicals may be manually filled in the first syringe 91 or the second syringe 92, or may be filled in the first syringe 91 or the second syringe 92 by the injection device 100 or the filling device. Further, the first syringe 91 and the second syringe 92 may be prefilled syringes.

A foot switch 16 is wiredly connected to the injection device 100, and the operator can operate the foot switch 16 to start injection of the chemical solution. The foot switch 16 may be wirelessly connected to the injection head 1. Further, instead of the foot switch 16, a remote control device such as a hand switch can be connected to the injection head 1 by wire or wirelessly, and the injection of the chemical solution can be started by the operation.

Although the injection head 1 is connected to an external power source via an AC adapter (not shown), the injection head 1 can also have a built-in battery. Further, the injection head 1 may be mounted on a caster stand (not shown), or may be integrally configured with the caster stand. Further, a ceiling suspension member may be provided, and the injection head 1 may be suspended from the ceiling via the ceiling suspension member.

A three-way stopcock 103 is connected to the tip of the first syringe 91. A first tube 104 is connected to the tip of the second syringe 92. The first tube 104 is connected to the three-way stopcock 103. Further, the second tube 105 is connected to the first syringe 91 via a three-way stopcock 103. Then, the tip of the second tube 105 is connected to a catheter or the like. In FIG. 1, the first tube 104 and the second tube 105 are shown by dotted lines for convenience.

A groove is formed in the first holding unit 11 as an installation portion 111 to which the three-way stopcock 103 is attached. Further, the first holding unit 11 is formed with a groove having a U-shaped cross section as a guide portion 112 for guiding the first tube 104 and a guide portion 113 for guiding the second tube 105. The guide unit 112 communicates with the guide unit 113. As a result, the first tube 104 and the second tube 105 extend to the outside from the common guide portion 113. Therefore, even if the first holding unit 11 swings, the first tube 104 and the second tube 105 are prevented from being twisted. If it is unnecessary, the common guide unit 113 may be omitted.

As shown in FIG. 2, the injection device 100 is connected to the first drive unit 2 for pushing out the first chemical solution from the first syringe 91 filled with the first chemical solution, the first holding unit 11, and the first syringe. In order to stir the first chemical solution in 91, a stirring unit 3 that swings the first holding unit 11 is provided. The first drive unit 2 and the stirring unit 3 are housed in the cover of the injection head 1. Further, a second drive unit 6 for pushing out the second chemical solution from the second syringe 92 filled with the second chemical solution is also housed in the cover of the injection head 1. Since the second drive unit 6 has the same configuration as the first drive unit 2 except that the stirring unit 3 is provided, the description thereof will be omitted.

The first drive unit 2 has a hollow motor 22 (FIG. 3) housed in the housing 20, and a conversion mechanism 23 (FIG. 3) that converts the rotational motion from the hollow motor 22 into a linear motion. A piston 914 is attached to the first syringe 91. The first drive unit 2 further includes a presser 21 that pushes the rear end 913 of the piston 914 as the rear end of the first syringe 91. When ready for injection, the presser 21 is in close proximity to the rear end 913 of the piston 914.

The first drive unit 2 advances the presser 21 along the axial direction of the first syringe 91. Then, when the presser 21 pushes the piston 914 to move forward, the piston 914 also moves forward and the contrast medium in the first syringe 91 is pushed out. The extruded contrast medium is injected into the patient's body via the three-way stopcock 103 and the second tube 105. A syringe hook (not shown) for fixing the rear end 913 to the presser 21 can be attached to the presser 21. Then, when the presser 21 retracts with the rear end 913 fixed to the presser 21, the piston 914 can be retracted.

The first holding unit 11 is connected to the stirring unit 3 via the front rotating member 124. The stirring unit 3 has a stirring motor 32 for driving the first holding unit 11 and a transmission mechanism 33 for transmitting the rotational movement from the stirring motor 32 to the front rotating member 124. The transmission mechanism 33 has a pulley 331 that is connected to the output shaft of the stirring motor 32 and rotates together with the output shaft, and a belt 332 that is hung around the pulley 331. A DC motor can be used as the stirring motor 32. Further, the stirring motor 32 is equipped with an encoder 321 for detecting the rotation angle.

The front rotating member 124 is rotatably attached to the front fixing portion 134. The belt 332 is also hung around the rear portion 128 (FIG. 3) of the front rotating member 124. Further, the housing 20 is fixed to the front rotating member 124 and can rotate together with the front rotating member 124. Further, the front rotating member 124 is connected to the rear end of the first holding unit 11 via the first supporting member 14. Then, the first holding unit 11 rotates together with the front rotating member 124. Instead of the pulley 331 and the belt 332, the rotary motion may be transmitted to the front rotating member 124 by a gear.

The rotational movement from the stirring motor 32 is transmitted to the first holding unit 11 via the pulley 331, the belt 332, the front rotating member 124, and the first supporting member 14. Then, the first holding unit 11 swings alternately along the direction A intersecting the axial direction of the first syringe 91. The rotational movement from the stirring motor 32 is also transmitted to the housing 20 via the pulley 331, the belt 332, and the front rotating member 124. Then, the housing 20 also swings together with the first holding unit 11.

FIG. 3 is a schematic cross-sectional view showing a cross section of the first driving unit 2 and the stirring unit 3 of FIG. 2 cut in the horizontal direction. The hollow motor 22 of the first drive unit 2 functions as an injection motor for driving the presser 21. The first drive unit 2 has a conversion mechanism 23 that converts the rotary motion from the hollow motor 22 into a linear motion. The hollow motor 22 is fixed to the housing 20 and housed therein. A stepping motor can be used as the hollow motor 22.

The conversion mechanism 23 has a ball screw nut 231 and a screw shaft 232 to which the ball screw nut 231 is attached. The ball screw nut 231 is connected to the hollow motor 22. Further, the screw shaft 232 extends through the front rotating member 124 and extends through the rear rotating member 125 and the housing 20. Further, the front rotating member 124 has a bearing 123 for the screw shaft 232, and a presser 21 is fixed to the front end of the screw shaft 232. A rear end detection unit 150 that detects the rear end 913 of the piston 914 in a non-contact manner is attached to the presser 21.

The first support member 14 extends through the presser 21 and is connected to the front rotating member 124 attached to the front fixing portion 134, and functions as a detent for the screw shaft 232 described later. Then, when the ball screw nut 231 rotates in the normal direction by the hollow motor 22, torque is transmitted to the screw shaft 232 and the screw shaft 232 advances. Similarly, when the ball screw nut 231 is reversed, the screw shaft 232 is retracted. A part of the conversion mechanism 23 is arranged inside the hollow motor 22. That is, the screw shaft 232 extends through the central portion of the hollow motor 22, and the ball screw nut 231 is arranged inside the hollow motor 22. As a result, the radius of gyration when the housing 20 swings can be reduced. As the detent, a ball spline nut rotatably connected to another motor can also be used.

The front rotating member 124 is attached to the front fixing portion 134 via a plurality of rollers 136 as bearings. Similarly, the rear rotating member 125 is attached to the rear fixing portion 135 via a plurality of rollers 137 as bearings. The front fixing portion 134 and the rear fixing portion 135 are both fixed to the inside of the injection head 1. Further, the front rotating member 124 and the rear rotating member 125 are fixed to the housing 20. As a result, when the belt 332 rotates, the housing 20 swings while being supported by the front fixing portion 134 and the rear fixing portion 135.

The first support member 14 has a hollow shape. Then, the injection device 100 includes a wiring 10 passing through the first support member 14. That is, the wiring 10 electrically connected to the control unit can be routed through the inside of the first support member 14. Further, the front rotating member 124 is formed with a through hole that communicates with the rear end opening of the first support member 14. Similarly, the housing 20 is formed with a through hole that communicates with the rear end opening of the through hole of the front rotating member 124. Further, the rear rotating member 125 is also formed with a through hole communicating with the rear end opening of the through hole of the housing 20. The wiring 10 extends downward from the rear end of the rear rotating member 125 toward the control unit.

The screw shaft 232 also has a hollow shape. Then, the injection device 100 includes a wiring 10 passing through the screw shaft 232. That is, the wiring 10 can also be routed through the inside of the screw shaft 232. In FIG. 3, the wiring 10 inside the first support member 14 and the screw shaft 232 is shown by a dotted line for convenience.

As a result, it is possible to prevent the wiring 10 from being entangled when the first holding unit 11 and the housing 20 swing. The wiring 10 passing through the first support member 14 or the screw shaft 232 is connected to the motor, the detection unit, the lamp, and the like. As the motor, for example, there is a motor that drives a switching lever of the three-way stopcock 103. Further, as the detection unit, for example, there are a detection unit that detects the rotation angle of the three-way stopcock 103, a turbidity detection unit for a chemical solution, a turbidity sensor, a CCD camera for turbidity detection, a position detection unit at the rear end 913, and the like. Further, as the lamp, there are a lamp used for an optical sensor, a power supply indicator lamp and the like.

The front rotating member 124 will be described in more detail with reference to FIG. FIG. 4 shows a cross section of the first holding unit 11 cut perpendicular to the rotation axis of the swing shaft 126 and the screw shaft 232 in the vertical direction. A pair of wiring holes 127 are formed in the front rotating member 124 as through holes communicating with the rear end opening of the first support member 14. Further, a wiring hole 237 is also formed in the central portion of the screw shaft 232. The front rotating member 124 is fixed to the housing 20 with four bolts and is rotatably attached to the front fixing portion 134.

The rotational movement from the stirring motor 32 is transmitted to the front rotating member 124 via the pulley 331 and the belt 332. Then, the first drive unit 2 including the front rotating member 124 and the housing 20 swings around the swing shaft 126. Further, the swing shaft 126 of the front rotating member 124 and the rotating shaft of the screw shaft 232 are co-axises. In this way, since the swing shaft 126 coincides with the rotation shaft of the screw shaft 232, the size of the housing 20 is made the same as or smaller than the front rotation member 124, so that the first drive unit during swing The turning radius of 2 is equal to or less than the radius R1 of the front rotating member 124. In other words, the radius of gyration of the first drive unit 2 during rocking is equal to or less than the radius of gyration when the front rotating member 124 is rotated around the axis of rotation of the screw shaft 232.

On the other hand, when the swing shaft 126 and the rotation shaft of the screw shaft 232 are not co-axis, the rotation radius R2 of the first drive unit 2 at the time of swing is larger than the radius R1. For example, in FIG. 4, as an example in which the swing shaft 126 and the rotation shaft of the screw shaft 232 are not co-axis, the trajectory of the first drive unit 2 when the housing 20'is provided alongside the screw shaft 232 is virtual. Is shown by the dotted line B. In this case, when the housing 20'is swung, it protrudes from the rotation trajectory of the front rotating member 124, so that the turning radius R2 becomes larger than the radius R1 of the front rotating member 124. Therefore, the size of the injection head 1 also increases.

As described above, assuming that the sizes of the front rotating member 124 and the housing 20 are the same between the two configurations, the radius of rotation of the first drive unit 2 can be reduced by using the same axis. As a result, the size of the injection head 1 can be reduced.

Subsequently, the first holding unit 11 will be described with reference to FIG. A stopper arm 106 that is rotatable in the horizontal direction is provided on the front portion of the first holding unit 11. The stopper arm 106 can move between a retracted position retracted from the guide portion 113 and a holding position protruding from the guide portion 113. Then, the stopper arm 106 located at the holding position can regulate the first tube 104 and the second tube 105 extending from the guide portion 113 so as not to come off from the guide portion 113.

The first holding unit 11 is formed with a groove as a syringe installation portion 119 that receives the front portion of the first syringe 91. A turbidity detection unit (not shown) can be arranged on the syringe installation portion 119. The turbidity detecting unit includes, for example, a pair of upper light emitting units and an upper light receiving unit, and a pair of lower light emitting units and a lower light receiving unit. Then, the amount of light received by the upper light receiving portion and the lower light receiving portion is compared, and the separation of the suspension is detected based on the bias of the light amount.

Further, the installation portion 111 of the three-way stopcock 103 formed in the first holding unit 11 is provided with a fitting portion 41 into which the switching lever 107 of the three-way stopcock 103 is fitted. The fitting portion 41 is formed with a groove having an internal shape complementary to the external shape of the switching lever 107. Then, the fitting portion 41 is rotated by the lever drive portion 4 provided in the first holding unit 11. The lever drive unit 4 will be described with reference to FIGS. 6 and 7. FIG. 6 is a schematic perspective view of the first holding unit 11 as viewed from the rear, and FIG. 7 shows a cross section of the first holding unit and the first driving unit cut vertically along the longitudinal direction.

The lever drive unit 4 has a lever drive motor 42 that rotationally drives the fitting unit 41 in order to drive the switching lever 107 of the three-way stopcock 103. A DC motor can be used as the lever drive motor 42, and the lever drive motor 42 is arranged on the second holding unit 12 side with respect to the three-way stopcock 103. Further, the lever drive unit 4 has a transmission mechanism 43 that transmits the rotational movement from the lever drive motor 42 to the fitting unit 41. The lever drive motor 42 may be arranged on the side opposite to the second holding unit 12 side with respect to the three-way stopcock 103.

The transmission mechanism 43 has a pulley 431 connected to the output shaft of the lever drive motor 42, a pulley 432 paired with the pulley 431, and a belt 433 hung around the pulley 431 and the pulley 432. Further, the transmission mechanism 43 has a worm gear including a worm 434 and a worm wheel 435. Since the transmission mechanism 43 has the worm gear in this way, the self-locking function of the worm gear can prevent the fitting portion 41 from erroneously rotating even when an external force is applied.

The worm wheel 435 is fixed to the fitting portion 41. The rotational movement from the lever drive motor 42 is transmitted to the worm 434 via the pulley 431, the belt 433, and the pulley 432. Then, when the worm 434 rotates, the worm wheel 435 and the fitting portion 41 rotate in the horizontal direction. In this way, the lever drive unit 4 can rotationally drive the switching lever 107 of the three-way stopcock 103. Then, as the switching lever 107 rotates, the flow path in the three-way stopcock 103 is switched. As a result, the injection device 100 can switch the flow path in the three-way stopcock 103 at a predetermined timing.

The injection device 100 includes an openness detection unit 44 as a detection unit for detecting the opening of the flow path of the first chemical solution (for example, a contrast medium) in the three-way stopcock 103. The opening detection unit 44 is an optical slit sensor, and detects the opening of the flow path of the contrast medium by detecting the slit of the shielding flange 411 provided in the fitting portion 41. If the piston 914 of the first syringe 91 is pushed while the flow path of the contrast medium is closed, the pressure is applied to the contrast medium, and as a result, the microbubbles in the suspension are broken. Therefore, the control unit 5 (FIG. 8) of the injection device 100 controls the first drive unit 2 so as not to push out the first chemical solution when the opening of the flow path is not detected. In this way, when the opening detection unit 44 does not detect the opening, the destruction of the microbubbles can be avoided by prohibiting the pressing of the piston 914. In addition, instead of or together with the prohibition, the touch panel 13 may display a warning when the opening detection unit 44 does not detect the opening. Further, the injection head 1 may emit a warning sound.

Subsequently, with reference to FIGS. 7 and 2, the origin detection unit 131 for detecting the origin which is the original position at the time of rocking and the limit detection unit 140 for detecting the limit of movement of the presser 21 will be described. An optical slit sensor is provided as an origin detection unit 131 behind the rear rotating member 125. Further, a shielding plate 132 having a slit formed is fixed to the rear end of the rear rotating member 125. Then, the shielding plate 132 rotates together with the rear rotating member 125, and the origin detecting unit 131 detects the origin of the swing of the first holding unit 11 by detecting the slit of the shielding plate 132. The swing angle can be detected by the encoder 321 of the stirring motor 32.

Further, behind the rear rotating member 125, a front limit detecting unit 141 and a rear limit detecting unit 142 are provided as limit detecting units 140. A shielding plate 143 is fixed to the rear end of the screw shaft 232, and the shielding plate 143 moves forward or backward together with the screw shaft 232. Further, the front limit detection unit 141 and the rear limit detection unit 142 are optical slit sensors. The front limit detection unit 141 is arranged at a position where the presser 21 and the screw shaft 232 are shielded by the shielding plate 143 when they advance to the limit. On the other hand, the rear limit detection unit 142 is arranged at a position where the presser 21 and the screw shaft 232 are shielded by the shielding plate 143 when the presser 21 and the screw shaft 232 are retracted to the limit.

The front limit detection unit 141 detects the limit of advance by detecting the shielding plate 143. Then, the rear limit detection unit 142 detects the limit of retreat by detecting the shielding plate 143. In the first drive unit 2, the shielding plate 143 is arranged so as to project in the vertical direction. On the other hand, in the second drive unit 6, the shielding plate 143 is arranged so as to project in the horizontal direction.

Subsequently, the control unit as the control device of the injection device 100 will be described with reference to FIG. FIG. 8 is a schematic block diagram of the injection device 100. The injection device 100 includes a control unit 5 that controls a first drive unit 2, a second drive unit 6, a stirring unit 3, and a lever drive unit 4 in order to control injection of a chemical solution, and a memory unit 53 as a storage unit. It has.

The control unit 5 is, for example, a CPU that is a one-chip microcomputer, and is arranged below the first drive unit 2, the second drive unit 6, and the stirring unit 3. Then, the control unit 5 executes processing operations such as predetermined calculation, control, and determination in addition to controlling each motor according to the program stored in the memory unit 53 in advance. The memory unit 53 includes a RAM (Random Access Memory) which is a system work memory for operating a main CPU (Central Processing Unit), a ROM (Read Only Memory) for storing a program or system software, a hard disk drive, and the like. ..

Injection of the first and second drug solutions is done automatically according to the infusion protocol. In this injection protocol, for example, injection time, injection rate, injection amount and injection pressure limit value are set. Then, the touch panel 13 displays the content of the injection protocol, and the operator can confirm the content of the injection protocol.

The injection protocol, drug solution data, and the like are stored in advance in the memory unit 53. When injecting a drug solution into a patient, the operator can operate the touch panel 13 to input data such as injection speed, injection amount, injection time and maximum injection pressure, and tube type data. Further, the operator may input data from the input button provided on the injection head 1 instead of the touch panel 13.

The control unit 5 may calculate the injection conditions based on the input data and the data stored in advance, and determine the amount of the drug solution to be injected into the patient and the injection protocol. In addition, the injection protocol, drug solution data, and the like can be input from an external storage medium. The injection protocol can also be password-locked so that it cannot be changed.

Before injecting the drug solution, the operator turns on the power of the injection device 100 and mounts the first syringe 91 and the second syringe 92. Then, when the operator completes the preparation for injection, the injection device 100 stands by in an injectable state. The operator may turn on the power of the injection device 100 after mounting the syringe. Then, the operator presses the foot switch 16 to start the injection of the chemical solution. In addition, the operator may start the injection by pressing the start button displayed on the touch panel 13 or the start button provided on the injection head 1 instead of the foot switch 16. Further, the injection device 100 may be configured so that the injection of the chemical solution is stopped by pressing the foot switch 16 again.

Upon receiving the injection start signal from the foot switch 16, the control unit 5 drives the hollow motor 22 of the first drive unit 2 according to the injection protocol. The rotary motion of the hollow motor 22 is converted into a linear motion by the conversion mechanism 23 and transmitted to the presser 21. Then, the presser 21 pushes the piston 914 toward the tip of the first syringe 91. As a result, the contrast medium in the first syringe 91 is injected. Further, the control unit 5 controls the injection time by using a timer (not shown) and monitors the injection status such as the injection pressure of the drug solution. Further, the control unit 5 may display the elapsed time from the start of injection or the end of injection on the touch panel 13 by counting up. Further, the control unit 5 may display the time until the start of imaging on the touch panel 13 by a countdown. As a result, imaging can be started at an appropriate timing. Since the injection of the second chemical solution is also performed in the same manner, the description of the injection of the second chemical solution will be omitted.

Further, the limit detection unit 140 (front side limit detection unit 141 and rear side limit detection unit 142) of the first drive unit 2 monitors the forward limit and the backward limit of the presser 21. Then, when the detection signal from the limit detection unit 140 is received, the control unit 5 stops the forward or backward movement of the presser 21. The limit detection unit 140 of the second drive unit 6 also monitors the forward limit and the backward limit in the same manner.

The control unit 5 causes the lever drive unit 4 to switch the flow path of the chemical solution according to the injection protocol. That is, the lever drive motor 42 is driven, and the switching lever 107 of the three-way stopcock 103 is rotated via the fitting portion 41. For example, when injecting a contrast medium, the control unit 5 rotates the switching lever 107 toward the second syringe 92 to open the line between the first syringe 91 and the second tube 105. Then, when flushing the contrast medium, the control unit 5 rotates the switching lever 107 toward the first syringe 91 to open the line between the second syringe 92 and the second tube 105.

Further, the control unit 5 determines the opening of the line between the first syringe 91 and the second tube 105 based on the detection signal from the opening detection unit 44. Then, when the opening of the line is not detected, the control unit 5 does not drive the first drive unit 2 and does not start the injection of the contrast medium. As a result, it is possible to prevent the presser 21 from being accidentally advanced while the line is closed. Therefore, it is possible to prevent the microbubbles of the contrast medium from being broken.

Further, the presser 21 is provided with an optical sensor having a pair of light emitting units and a light receiving unit as a rear end detecting unit 150. The rear end detection unit 150 projects forward of the presser 21. Therefore, the light emitted from the light emitting portion and reflected by the lower end surface of the rear end 913 of the piston 914 is incident on the light receiving portion before the presser 21 abuts on the rear surface of the rear end 913. Then, when the presser 21 approaches the rear end 913 and the reflected light is incident on the light receiving unit, the rear end detection unit 150 transmits the detection signal to the control unit 5. At this time, the contact surface of the presser 21 and the rear surface of the rear end are separated. However, the presser 21 may be brought close to the rear surface of the rear end until it is substantially in contact with the rear surface.

Then, when preparing for injection, the operator can use the stop assist mode. That is, the operator pushes the forward button 81 (FIG. 1) of the injection head 1 to bring the presser 21 closer to the rear end 913 of the piston 914 before injecting the chemical solution. Then, the control unit 5 advances the presser 21 by a predetermined forward distance after receiving the detection signal from the rear end detection unit 150, and stops the presser 21 at a position away from the rear end 913. Then, when the preparation for injection is completed, the injection device 100 stands by in a state where injection is possible. The forward button may be displayed on the touch panel 13 instead of the forward button 81, and the operator may press the displayed button to bring the presser 21 closer to the rear end 913.

The forward distance for advancing the presser 21 after the rear end 913 is detected is stored in advance in the memory unit 53, and varies depending on the shape, thickness, material, reflectance of the end face, and the like of the rear end. The control unit 5 acquires this forward distance from the memory unit 53. Even if the operator keeps pressing the forward button 81, the forward movement is stopped by the control unit 5.

The stop assist mode can prevent the presser 21 from accidentally pushing the piston 914 in preparation for injection. Therefore, it is possible to avoid destroying the microbubbles by accidentally pushing the piston 914 in a state where the flow path from the first syringe 91 is closed. In addition, instead of the optical sensor, an ultrasonic sensor, an electrostatic sensor, a magnetic sensor, or the like can be used as the non-contact sensor. Further, a contact type sensor can be used instead of the optical type sensor.

In addition, the operator stirs the contrast medium before injecting the drug solution. When agitating, the operator presses the agitation button 82 (FIG. 1) of the injection head 1. Upon receiving the stirring start signal, the control unit 5 drives the stirring motor 32 in order to cause the stirring unit 3 to perform a predetermined stirring operation. The rotational movement from the stirring motor 32 is transmitted to the front rotating member 124 via the transmission mechanism 33. Then, the first holding unit 11 swings together with the front rotating member 124.

Here, the stirring unit 3 is controlled by the control unit 5 so as to swing the first holding unit 11 at a predetermined swing angle. That is, the control unit 5 determines the origin of the swing according to the detection signal from the origin detection unit 131. Then, the swing amount of the first holding unit 11 is determined based on the signal from the encoder 321 of the stirring motor 32. As a result, the first holding unit 11 is controlled to reciprocate and swing within a range of a predetermined angle from the horizontal direction with respect to the swing shaft 126.

The stirring operation is, for example, a stirring time of 10 seconds to 300 seconds and a rotation speed of 10 rpm to 120 rpm. Further, the stirring operation is performed so as to repeat swinging in one direction and swinging in the opposite direction. For example, the control unit 5 swings the first holding unit 11 by 180 degrees in one direction. That is, the control unit 5 swings the first holding unit 11 to a position where the first syringe 91 faces downward. Then, after the first syringe 91 is stopped for 2 to 6 seconds with the first syringe 91 facing downward, the control unit 5 swings the first holding unit 11 180 degrees in the opposite direction. That is, the control unit 5 swings the first holding unit 11 so as to return to the original position (origin). Then, the control unit 5 swings the first holding unit 11 by 180 degrees in the opposite direction. That is, the control unit 5 swings the first holding unit 11 in the opposite direction until the position where the first syringe 91 faces downward. Then, after the first syringe 91 is stopped for 2 to 6 seconds with the first syringe 91 facing downward, the control unit 5 swings the first holding unit 11 so as to return to the original position. The time required from the start of rocking to the return to the original position can be 4 to 8 seconds excluding the stop time. Further, when the first holding unit 11 returns to the original position, the first holding unit 11 may be temporarily stopped at the original position before swinging in the opposite direction.

Further, the control unit 5 controls so that the injection is not started during the stirring operation. Then, the control unit 5 starts injecting the chemical solution after the swing of the first holding unit 11 is stopped. Therefore, when the injection start signal is received during the stirring operation, the control unit 5 waits for the end of the stirring operation to drive the hollow motor 22. As a result, the second tube 105 does not move due to the swinging motion during injection, and it is possible to prevent the catheter or the like from coming off from the patient.

Further, the control unit 5 can also cause the stirring unit 3 to perform a stirring operation when the injection is started. In this case, the control unit 5 that has received the injection start signal causes the stirring unit 3 to perform the stirring operation, and drives the hollow motor 22 after the stirring operation is completed. Further, the stirring operation can be automatically started when the separation of the chemical solution is detected. Separation of the chemical solution can be detected by a turbidity detection unit or the like, and the control unit 5 starts a stirring operation when receiving the detection signal. Further, the operator can be set to automatically perform the stirring operation at predetermined time intervals. If necessary, the stirring operation may be performed during the injection of the chemical solution.

According to the injection device according to the first embodiment, the syringe is fixed and held in the holding unit. As a result, it is possible to prevent the syringe from shifting during the stirring operation by swinging the holding unit by the stirring unit. Further, according to the injection device according to the first embodiment, the swing shaft of the holding unit is the same shaft as the rotation shaft of the screw shaft of the drive unit. As a result, the radius of gyration of the drive unit can be reduced, so that the size of the injection head can be reduced.

[Second Embodiment]
The injection device 200 of the second embodiment will be described with reference to FIG. FIG. 9 is a schematic block diagram for explaining the injection state of the contrast medium, and FIG. 10 is a flowchart for explaining the boost injection of the contrast medium. In the description of the second embodiment, the differences from the first embodiment will be described, the components described in the first embodiment will be given the same reference numbers, and the description thereof will be omitted. Unless otherwise specified, the components with the same reference numerals perform substantially the same operations and functions, and the effects thereof are also substantially the same.

Similar to the first embodiment, the injection device 200 includes a stirring unit 3 that swings the first syringe 91 and the first holding unit 11. Then, as shown in FIG. 9, the first driving unit 201 for injecting the contrast medium as the first chemical solution is connected to the first syringe 91. Further, the second driving unit 202 for injecting the physiological saline as the second chemical solution is connected to the second syringe 92. The second syringe 92 is connected to the second tube 105 via the first tube 104 and a three-way stopcock (not shown). Further, the first syringe 91 is connected to the second tube 105 via a three-way stopcock. A catheter 209 is connected to the tip of the second tube 105, and the drug solution is injected into the body via the catheter 209.

The amount of contrast medium filled in the first syringe 91 is small relative to the volume of the second tube 105. Therefore, when the contrast medium is injected, the contrast medium stops at the first position P1 far from the catheter 209. Then, the contrast medium at the first position P1 is pushed out by the physiological saline flowing in the direction indicated by the arrow C and injected into the body. In this case, there is a difference between the timing when the contrast medium is actually injected into the body and the timing when the injection device 100 starts injecting the contrast medium. If the imaging is started after a predetermined time has elapsed after the injection of the injection device 100 is started, the image quality of the captured image may deteriorate due to this deviation.

Therefore, the control unit 205 as the control device of the injection device 200 according to the second embodiment acquires the injection amount of the second chemical solution according to the second tube 105 connected to the first syringe 91 via the three-way stopcock. .. Then, after pushing out the first chemical solution, the second chemical solution of this injection amount is injected, and the second drive unit 202 is controlled so as to boost the first chemical solution and stop it in the second tube 105. That is, the control unit 205 controls the second drive unit 202 so as to move the contrast medium to the second position P2 near the catheter 209 after the injection of the contrast medium.

Further, depending on the length of the second tube 105, the amount of saline required to move the contrast medium varies. Therefore, the control unit 205 determines the required amount of physiological saline to be injected according to the length (type) of the second tube 105. The boost injection will be described below, but the same control as in the first embodiment will be omitted.

First, the operator inputs tube information such as the type, length or volume of the second tube 105 to be used before starting the injection of the drug solution into the injection device 200 (S201). Then, when the input is performed (YES in S201), the control unit 205 stores the input tube information in the memory unit 253 as a storage unit (S202). In the memory unit 253, a data table in which the injection amount of the physiological saline used for the boost injection and the corresponding tube information are associated with each other is stored in advance. Then, the control unit 205 refers to this data table and acquires the injection amount of the physiological saline solution corresponding to the input tube information (S203).

When starting the injection of the drug solution, the operator presses the foot switch 16. Then, when the control unit 205 receives the injection start signal from the foot switch 16 (YES in S204), the control unit 205 causes the first drive unit 201 to start the injection of the contrast medium (S205). When the desired amount of contrast agent is extruded according to the injection protocol, the contrast agent stops at position P1. Therefore, the control unit 205 causes the second drive unit 202 to inject the physiological saline solution so as to push the drug solution along the flow direction D (S206). Here, the control unit 205 controls the second drive unit 202 so as to inject the obtained injection amount of physiological saline. On the other hand, when not receiving (NO in S204), the control unit 205 waits for the reception of the injection start signal.

The contrast boosted by saline proceeds to position P2 near catheter 209. When the contrast medium reaches the second position P2 and the boost injection is completed, the operator pushes the foot switch 16 again. When the control unit 205 receives the injection start signal again from the foot switch 16 (YES in S207), the control unit 205 causes the second drive unit 202 to inject physiological saline (S208). As a result, the contrast medium at the second position P2 is extruded into the physiological saline solution and injected into the body, and the injection of the contrast medium is completed. On the other hand, when it is not re-received (NO in S207), the control unit 205 waits for the re-reception of the injection start signal.

When the tube information is not input (NO in S201) and the operator presses the foot switch 16 to receive the injection start signal (YES in S209), the control unit 205 injects the contrast medium into the first drive unit 201. Start (S210). On the other hand, when not receiving (NO in S209), the control unit 205 waits for the reception of the injection start signal.

The operator presses the foot switch 16 again when the injection of the contrast medium is completed. When the control unit 205 receives the injection start signal again from the foot switch 16 (YES in S207), the control unit 205 causes the second drive unit 202 to inject physiological saline (S208). As a result, the contrast medium is extruded into the physiological saline solution and injected into the body, and the injection of the contrast medium is completed. When the tube information is not input (NO in S201), the control unit 205 acquires a predetermined injection amount stored in the memory unit 253 in advance, and boost-injects the injection amount based on the acquired injection amount. May be good.

Also in the injection device according to the second embodiment, the syringe is fixed and held by the holding unit. As a result, it is possible to prevent the syringe from shifting during the stirring operation by swinging the holding unit by the stirring unit. Further, according to the injection device according to the second embodiment, it is possible to reduce the difference between the timing at which the drug solution is injected into the body and the timing at which the injection device starts injection, and it is possible to suppress deterioration of image quality. Further, even when a plurality of types of tubes having different lengths are used, the contrast medium can be boosted and advanced to an appropriate position.

In the second embodiment, the control unit 205 that has received the injection start signal automatically starts the boost injection of the contrast medium. However, after the desired amount of contrast agent has been extruded, the operator may press the foot switch 16 again to initiate boost injection by the control unit 205. Further, the control unit 205 may start the boost injection by pressing the start button after the injection preparation is completed. Further, the injection head 1 or the touch panel 13 may be provided with a boost button, and the operator may press the boost button to start the boost injection by the control unit 205. Further, the control unit 205 may start the boost injection according to the number of times the foot switch 16 is pressed.

Further, the control unit 205 may calculate the injection amount of the physiological saline solution based on the input length of the second tube 105. Further, when the operator inputs a desired distance for boosting the contrast medium, the control unit 205 may calculate the injection amount of the physiological saline solution based on the input distance.

Further, instead of the operator inputting the tube information, the three-way stopcock 103 may be provided with a tube information input means, and the control unit 205 may automatically acquire the tube information based on the input from the input means. .. The input means includes a data carrier in which tube information is recorded, a protrusion that can be detected by a sensor, and the like. In this case, the control unit 205 can read the tube information from the data carrier. Further, the control unit 205 can determine the tube information based on the number or length of the protrusions detected by the sensor.

Although the present invention has been described above with reference to each embodiment, the present invention is not limited to the above embodiments. The present invention also includes inventions modified to the extent not contrary to the present invention, and inventions equivalent to the present invention. In addition, the above-described embodiments and modifications can be appropriately combined as long as they do not contradict the present invention.

For example, an ultrasonic motor can be used for each motor. Further, although the second holding unit 12 is fixed, it can be swung in the same manner as the first holding unit 11. In addition, the injection device 100 can be used together with a medical imaging device other than the ultrasonic diagnostic device. Examples of such medical imaging devices include MRI (Magnetic Resonance Imaging) devices, CT (Computed Tomography) devices, angio imaging devices, PET (Positron Emission Tomography) devices, SPECT (Single Photon Emission Computed Tomography) devices, and CT. There are various medical imaging devices such as angio devices, MR angio devices, and blood vessel imaging devices.

The injection device can also be wired or wirelessly connected to the imaging device. In this case, various data are transmitted and received between the imaging device and the injection device when the chemical solution is injected and when an image is taken. For example, the imaging condition may be set or displayed in the injection device, and the injection condition may be set or displayed in the imaging device. In addition, the imaging device and the injection device can be linked. For example, the injection device may transmit a signal indicating injection start or injection completion to the image pickup device, and the image pickup device may start imaging at the timing when the signal is received.

In addition, the injection device transmits information on injection results (injection history and stirring operation history) to external sources such as RIS (Radiology Information System), PACS (Picture Archiving and Communication Systems), and HIS (Hospital Information System) via a network. It can also be transmitted to a storage device and stored. In this case, the history of the stirring operation may include data such as the name of the chemical solution, the stirring time, and the shaking speed. In addition, the injection history may include data such as the name of the drug solution, the injection rate, the injection amount, the injection time and the maximum injection pressure. When the injection device includes a communication unit, information on the imaging result, for example, an examination ID, an imaging time, an imaging site, and the like can be acquired from the ultrasonic diagnostic apparatus via the communication unit. Then, the injection device can store the injection result associated with the imaging result in the external storage device. The operator can also send and receive information such as an injection protocol to the injection device by using the terminal of the in-hospital information system.

Further, the syringe may be provided with a data carrier such as RFID or barcode. Information such as the filled chemical solution is recorded in this data carrier. The injection device can then read the information recorded from the data carrier via the injection head. For example, the injection device can display the read information on the drug solution on the display unit of the injection head. Information on the chemical solution includes, for example, product name, drug name, product ID, chemical classification, contained components, concentration, viscosity, syringe capacity, syringe pressure resistance, cylinder inner diameter, piston stroke, and the like.

Further, during the injection of the chemical solution, an animation indicating that the injection is in progress may be displayed on the display unit of the injection head 1. As such an animation, for example, a green water droplet-like image showing a contrast agent is displayed so as to flow out from the tip of an image of a green syringe, and a blue water droplet-like image showing a physiological saline solution is displayed. Display so that it flows out from the tip of the image of the blue syringe. Alternatively, when the drug solution is injected with the second tube 105 connected, the tube image shows the color indicating the drug solution (for example, green indicating the contrast agent, blue indicating the saline solution, or blue indicating the mixed solution). The color changes so that it becomes green or blue-green). As a result, the actual injection status is displayed in animation, and the operator can visually determine the injection status. In addition, the piston portion of the image of the syringe may be displayed so as to move forward or backward in conjunction with the injection of the chemical solution.

In addition, the chemical solution can be injected according to the following flow (see FIG. 1). First, as a preliminary preparation, the operator stirs a predetermined amount of the contrast medium and fills the first syringe 91, and prepares the second syringe 92 filled with physiological saline. The second syringe 92 has a capacity of, for example, 30 ml or 50 ml. The operator then connects the second syringe 92 to the short first tube 104. Then, the operator fills the section of the first tube 104 and the second tube 105 to the portion to which the catheter (not shown) is connected with physiological saline to bleed air. At this time, the side of the three-way stopcock 103 connected to the first syringe 91 is in a closed state (the contrast medium line is OFF).

Next, the operator rotates the switching lever 107 of the three-way stopcock 103 so that the side connected to the second tube 105 of the three-way stopcock 103 is in a closed state. After that, the operator fills the inside of the three-way stopcock 103 with physiological saline to bleed air. Then, the operator connects the first syringe 91 to the three-way stopcock 103 and rotates the switching lever 107 so that the contrast medium line is turned off.

Next, the operator turns on the power of the injection device 100 and presses the presser return button on the syringe setup screen displayed on the touch panel 13. Upon receiving that the presser return button has been pressed, the control unit 5 (FIG. 8) causes the stirring unit 3 to swing the first holding unit 11 to the origin position, which is the original position at the time of swinging. For example, when the first holding unit 11 is tilted, the first holding is performed to the origin position so that the syringe installation portion 119 (FIG. 5) of the first syringe 91 faces upward and is in a horizontal posture with respect to the ground. The unit 11 swings. When the retreat is not completed, the control unit 5 retreats the presser 21 to the first drive unit 2 (FIG. 8).

The operator then punctures the patient with a catheter and connects the catheter to the second tube 105. Then, after confirming that there is back blood, the operator mounts the first syringe 91 and the second syringe 92 on the injection device 100. At this time, the fitting portion 41 (FIG. 5) into which the switching lever 107 is fitted is in the initial position where the switching lever 107 can be fitted in advance. That is, the fitting portion 41 is oriented so that the switching lever 107 in the OFF state of the contrast medium line can be fitted.

Then, the operator presses the syringe setup button displayed on the touch panel 13. Upon receiving that the syringe setup button has been pressed, the control unit 5 rotates the fitting unit 41 on the lever drive unit 4 (FIG. 8) to rotate the switching lever 107. As a result, the side of the three-way stopcock 103 connected to the first syringe 91 is opened (the contrast agent line is ON). After that, the control unit 5 advances the presser 21 to the first drive unit 2 until it approaches or comes into contact with the rear end 913 (FIG. 2) of the piston 914 of the first syringe 91. By setting the switching lever 107 to the ON state of the contrast medium line before the presser 21 moves forward, it is possible to avoid applying excessive pressure to the contrast medium even if the piston 914 moves forward. Therefore, the microbubbles in the contrast medium are prevented from bursting.

Further, when the contrast medium is separated, the operator presses the stirring button 82 of the injection head 1. Then, the control unit 5 that has received the stirring start signal causes the stirring unit 3 (FIG. 8) to perform the stirring operation of the chemical solution.

To initiate the injection, the operator depresses the footswitch 16. Then, upon receiving the injection start signal from the foot switch 16, the control unit 5 advances the presser 21 to the first drive unit 2 and injects the contrast medium according to the injection protocol. When the advance is completed, the control unit 5 rotates the switching lever 107 to the lever drive unit 4 so that the contrast medium line is turned off. After that, the control unit 5 advances the presser 21 into the second drive unit 6 (FIG. 8) and injects physiological saline according to the injection protocol. At this time, the touch panel 13 displays an animation showing how the contrast medium moves at the same time as the injection of the physiological saline solution. In addition, the touch panel 13 can display the injection amount of the contrast medium. For example, the touch panel 13 displays 0.75 ml for a patient weighing 50 kg and 0.975 ml for a patient weighing 65 kg.

When the injection of the physiological saline is started, the control unit 5 causes the touch panel 13 to display the elapsed time (counter) from the start of the injection of the physiological saline. In addition, when the injection of the physiological saline is completed, the control unit 5 may display the elapsed time from the completion of the injection of the physiological saline or the elapsed time from the start of the injection on the touch panel 13. it can. Further, the control unit 5 can display not only the physiological saline solution but also the elapsed time from the start of injection or the completion of injection of the contrast medium. The control unit 5 can also display these elapsed times when the injection of the contrast medium is started or the injection is completed. Further, the control unit 5 rotates the switching lever 107 to the lever drive unit 4 so that the contrast medium line is turned on. As a result, even when the contrast medium is continuously injected a plurality of times (for example, two or four times), the next injection can be started immediately without waiting time.

When the imaging (examination) is complete, the operator removes the catheter from the patient. Then, the operator presses the presser return button displayed on the touch panel 13. Upon receiving that the presser return button has been pressed, the control unit 5 retracts the presser 21 to the first drive unit 2 in preparation for the next injection. At the same time, the control unit 5 rotates the switching lever 107 to the lever drive unit 4 so that the contrast medium line is turned off. By switching the contrast medium line to the OFF state, it is possible to immediately prepare for injection at the time of the next imaging. As described above, the chemical solution can be injected.

Further, the first holding unit 11 may be provided with a stopper (not shown) of a three-way stopcock 103 that moves to a holding position protruding from the guide portion 113. If the three-way stopcock 103 is not correctly mounted on the installation portion 111, the three-way stopcock 103 may be lifted and misaligned when the piston is advanced. Further, when the first holding unit 11 is turned upside down, the position of the three-way stopcock 103 may shift. Therefore, by pressing the three-way stopcock 103 with a stopper that can rotate in the horizontal direction, it is possible to prevent the occurrence of the misalignment. The first holding unit 11 may be provided with a detection unit for detecting the fitting of the three-way stopcock 103, and if the three-way stopcock 103 is not fitted correctly, a warning may be displayed on the touch panel 13.

Further, the control unit 5 may cause the stirring unit 3 to automatically perform the stirring operation. For example, the control unit 5 may cause the stirring unit 3 to automatically perform the stirring operation at a predetermined timing (a timing at which a predetermined time has elapsed since the operator pressed the syringe setup button). Further, when the detection unit such as the turbidity detection sensor detects the separation of the contrast medium, the control unit 5 that receives the detection signal may cause the stirring unit 3 to automatically perform the stirring operation. Further, when the operator pushes down the foot switch 16 during the rocking operation, the control unit 5 may stop the rocking operation and start injecting the chemical solution. Alternatively, when the operator pushes down the foot switch 16 during the rocking operation, the control unit 5 may start injecting the chemical solution while continuing the rocking operation. When the chemical solution is injected while continuing the rocking operation, the control unit 5 may slow down the rocking speed while the presser 21 is advancing.

This application claims priority from Japanese Patent Application No. 2014-0539777 filed on March 17, 2014, and the contents are cited as part of this application.

2: 1st drive unit, 3: Stirring unit, 4: Lever drive unit, 5: Control unit, 6: 2nd drive unit, 10: Wiring, 11: 1st holding unit, 14: 1st support member, 21: Presser, 22: Hollow motor, 23: Conversion mechanism, 44: Open detector, 91: 1st syringe, 92: 2nd syringe, 100: Injection device, 103: Three-way stopper, 105: 2nd tube, 107: Switching lever , 111: Installation part, 124: Front rotating member, 126: Shaking shaft, 150: Rear end detection unit, 200: Injection device, 201: First drive unit, 202: Second drive unit, 205: Control unit, 231 : Ball screw nut, 232: Screw shaft, 913: Rear end

Claims (7)

The first driving unit that pushes the first chemical solution from the first syringe filled with the first chemical solution to the second tube, and the second syringe filled with the second chemical solution to the second tube via the first tube. It is a control device of a drug solution injection device that has a second drive unit that pushes out a second drug solution and injects the drug solution into the human body.
Said second tube, which the tip is connected to the catheter,
The control device drives the first driving unit so as to push out the first chemical solution to the first position in the second tube, and after the pushing out of the first chemical solution, the said via the first tube. The second driving unit is controlled so as to push the second chemical solution into the second tube, and the first chemical solution at the first position is boosted by the second chemical solution to push the first chemical solution at the first position in the second tube. The second drive unit is controlled so as to stop at the second position closer to the human body than the human body.
The control device boosts the first chemical solution by controlling the second driving unit so as to push out an amount of the second chemical solution corresponding to the length of the second tube, and stops at the second position. Control device to let. The control device includes a storage unit.
The control device according to claim 1, wherein the second driving unit performs the injection of the second chemical solution in a predetermined injection amount stored in the storage unit in advance. When the control device receives the injection start signal after the stop of the first drug solution in the second tube, further injection of the second drug solution is executed, and the first drug solution is the person. The control device according to claim 1, which reaches the inside of the body. A first drive unit that pushes the first chemical solution from the first syringe filled with the first chemical solution to the second tube, and
A second drive unit that pushes the second chemical solution from the second syringe filled with the second chemical solution to the second tube via the first tube, and
A drug solution injection device comprising the first drive unit and a control device for controlling the second drive unit, and injecting a drug solution into the human body.
Said second tube, which the tip is connected to the catheter,
The control device drives the first driving unit so as to push out the first chemical solution to the first position in the second tube, and after the pushing out of the first chemical solution, the said via the first tube. The second driving unit is controlled so as to push the second chemical solution into the second tube, and the first chemical solution at the first position is boosted by the second chemical solution to push the first chemical solution at the first position in the second tube. The second drive unit is controlled so as to stop at the second position closer to the human body than the human body.
The control device boosts the first chemical solution by controlling the second driving unit so as to push out an amount of the second chemical solution corresponding to the length of the second tube, and stops at the second position. A chemical injection device. The control device includes a storage unit.
The chemical solution injection device according to claim 4, wherein the second drive unit is the injection of the second chemical solution in a predetermined injection amount stored in the storage unit in advance. When the control device receives the injection start signal after the stop of the first drug solution in the second tube, further injection of the second drug solution is executed, and the first drug solution is the person. The drug solution injection device according to claim 4, which reaches the body. The chemical injection device according to claim 6, wherein the chemical injection device has a foot switch that can be operated by a user, and the injection start signal is input by operating the foot switch.

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