JP4367911B2 - Chemical injection device - Google Patents

Description

  The present invention relates to a syringe for injecting a drug solution into a patient, a drug solution injection device, and a syringe mounting method.

  Conventionally, as a chemical | medical solution injection device, what has a drive motor and a slider mechanism, for example, and the syringe is mounted | worn detachably is disclosed (for example, refer patent documents 1, 2).

  Then, for example, when a thrombus of a thrombotic patient is gradually dissolved and removed, a pulse injection method (hereinafter referred to as a pulse injection method) is used to repeatedly inject a certain amount of drug solution. Yes.

  A conventional chemical injection device in which this type of pulse injection method is used includes a cylindrical syringe, a syringe mounting portion to which the syringe is mounted, and a drive mechanism for reciprocating the piston member of the syringe. .

In the conventional drug solution injector configured as described above, a fixed amount of drug solution is repeatedly injected into the patient by reciprocally driving the piston member of the syringe mounted on the syringe mounting unit with a predetermined pulse by the drive mechanism. .
JP 2002-11096 A (FIGS. 11 to 14) Japanese Patent Laying-Open No. 2002-102343 (FIG. 8)

  By the way, the conventional syringe has variation due to dimensional tolerance of the outer diameter. For this reason, in the conventional chemical | medical solution injection | pouring apparatus, there existed a problem that the syringe with which the inside of a syringe mounting part was loose | fluctuated by variation of each dimensional tolerance of a syringe mounting part and a syringe.

  In particular, the conventional chemical injection device using the above-described pulse injection method has a problem that during the injection operation, the syringe attached to the syringe attachment portion vibrates in the syringe attachment portion and the attachment position in the syringe attachment portion changes. was there. Therefore, in the conventional syringe, the injection operation becomes unstable, and the injection amount of the chemical solution may fluctuate.

  Further, there is a disadvantage that a patient who has been injected with a chemical solution using the pulse injection method cannot grasp the injection amount of the chemical solution.

Then, an object of this invention is to provide the chemical | medical solution injection | pouring apparatus which can grasp | ascertain easily the total injection amount of a chemical | medical solution. The present invention is further added for this purpose, to prevent the syringe with syringe mounting portion is floating, to provide a drug injection equipment that can be improved and the reliability of the operation of injecting liquid medicine also object of One .

In order to achieve the above-described object, a chemical solution injection device according to the present invention includes a syringe mounting portion to which a syringe having a cylinder member and a piston member is mounted, and a chemical solution is placed in the cylinder member mounted on the syringe mounting portion. It is a chemical liquid injector for filling and injecting the chemical liquid into a patient continuously and repeatedly by a reciprocating motion of a piston member. The chemical injection device of the present invention calculates a total injection amount based on a plurality of display lamps having different emission colors and the number of injections by reciprocating movement of the piston member, and sequentially flashes the display lamps corresponding to the total injection amount. And a control unit. In the chemical injection device of the present invention, a flat plate-like restricting portion for restricting the mounting position of the cylinder member attached to the cylinder attaching portion is further provided on the circumferential surface of the cylinder member so that the long side is parallel to the moving direction of the piston member It is formed and is provided so as to contact the outer peripheral surface of the cylinder member at the center of the short side perpendicular to the moving direction of the piston member. And an engagement portion provided with an engagement member movably provided between an engagement position engaged with the restriction portion and a release position where the engagement state of the restriction portion is released, and the cylinder member serving as the restriction portion. There is a mounting recess that is mounted upward.

In the chemical solution injection device according to the present invention configured as described above, filling and injection are repeatedly performed continuously as in a chemical solution filling operation, an injection operation, a filling operation, and an injection operation. At this time, the control unit calculates the total injection amount based on the number of injections due to the reciprocating motion of the piston member, and sequentially flashes the display lamp corresponding to the total injection amount, so by checking the blinking state of the display lamp, The total injection volume can be easily grasped.

Furthermore, according to the chemical injection device of the present invention, when the syringe is attached to the syringe attachment portion, the restriction portion of the cylinder member is engaged with the engagement portion. It is possible to prevent the syringe mounted in the unit from being idled and to improve the reliability of the liquid medicine injection operation.

  Moreover, the chemical | medical solution injection device which concerns on this invention may be provided with the drive means which reciprocates with a pulse the piston member which moves the inside of the cylinder member of a syringe. As a result, when the piston member is reciprocally driven by a pulse, the syringe is prevented from vibrating in the syringe mounting portion, the stability of the injection operation is ensured, and fluctuations in the injection amount of the chemical solution are suppressed.

As described above, according to the present invention, the total injection amount is calculated based on the plurality of display lamps having different emission colors and the number of injections by the reciprocating motion of the piston member, and the display lamps corresponding to the total injection amount are sequentially blinked. By having the control unit, the total injection amount of the chemical can be easily grasped. In addition, by providing a restricting portion for restricting the mounting position of the cylinder member on the circumferential surface of the cylinder member mounted on the syringe mounting portion, the syringe in the syringe mounting portion is prevented from floating, and the injection operation by the syringe is prevented. Reliability can be improved.

  Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

  The chemical solution injection device of this embodiment is used to continuously and repeatedly perform a series of filling / injecting operations of filling a syringe with a chemical solution and injecting the filled chemical solution into a patient.

  As shown in FIG. 1, a drug solution injector 1 includes a syringe mounting unit 3 to which a syringe 2 for injecting a drug solution into a patient is detachably mounted, a drive unit 4 for performing an injection operation with the syringe 2, And an operation unit 5 for operating the drive unit 4.

  As shown in FIG. 3, the syringe 2 used in the chemical liquid injector 1 includes a cylinder member 11 and a piston member 12 that is slidably provided in the cylinder member 11. On the outer peripheral surface of the cylinder member 11, a position restricting piece 13 for restricting the mounting position mounted on the syringe mounting portion 3 is integrally formed.

  The position restricting piece 13 is formed in a substantially rectangular flat plate shape, and the main surface is formed in parallel with the sliding direction of the piston member 12. The position restricting piece 13 is formed over the longitudinal direction, which is the sliding direction of the piston member 12. Further, the position restricting piece 13 is provided such that the center of the short side perpendicular to the sliding direction of the piston member 12 is in contact with the outer peripheral surface of the cylinder member 11, and protrudes on both sides in the radial direction of the cylinder member 11. Has been.

  A conduit 15 for injecting a chemical solution is integrally formed at the tip of the cylinder member 11. A fixing member 16 for attaching a flow path switching valve 17 is provided at the distal end portion of the conduit 15.

  Although not shown, one end of the piston member 12 is provided with a piston head. This piston head has two head members formed of an elastic material such as a rubber material, for example, and these head members are arranged at a predetermined interval. As described above, the piston member 12 includes the two head members, thereby preventing air from entering the cylinder member 11 from the outside when the piston member 12 reciprocates.

  As shown in FIGS. 2 and 3, a flow path switching valve 17 is fixed to the syringe 2 via a fixing member 16 at the distal end portion of the conduit 15 of the cylinder member 11. The flow path switching valve 17 is connected to a chemical solution tank (not shown) containing a chemical solution via a supply tube 18 and is used for injection to an injection needle (not shown) for injecting a chemical solution to a patient. They are connected via a tube 19.

  The syringe mounting portion 3 included in the chemical injection device 1 includes a placement recess 21 in which the cylinder member 11 of the syringe 2 is placed, an engagement recess 22 in which the position restriction piece 13 is engaged, and one of the position restriction pieces 13. And an engaging member 23 engaged with the side.

  The mounting recess 21 is notched at both ends in the sliding direction of the piston member 12. In the syringe 2 placed in the placement recess 21, the conduit 15 protrudes to the outside from one end side of the placement recess 21, and the piston member 12 protrudes from the other end side of the placement recess 21 to connect to the drive unit 4. Has been.

  The engaging recess 22 is formed to be slightly larger than the outer dimension of the position restricting piece 13, and is provided on both ends in the short side direction of the position restricting piece 13. The engaging recess 22 is positioned with respect to the syringe mounting portion 3 by abutting one end of the long side of the position restricting piece 13 parallel to the sliding direction of the piston member 12, and the piston member It is prevented from floating with respect to 12 sliding directions.

  Further, since the engagement recess 22 is engaged over the long side direction of the position restricting piece 13, a good engagement state is ensured over the entire longitudinal direction of the cylinder member 11. Further, since both ends in the short side direction of the position restricting piece 13 are respectively engaged with the engaging recess 22, it is ensured that the cylinder member 11 rotates around the axis in the sliding direction of the piston member 12. It is prevented.

The engaging member 23 is provided at a position corresponding to a substantially central portion of one side end of the long side of the position regulating piece 13. The engaging member 23 is formed at one end with an engaging claw 25 that is engaged with one side end of the position restricting piece 13, and the engaging claw 25 is moved toward and away from the engaging recess 22. In FIG. 2, it is slidable in the directions of arrows a ₁ and a ₂ . The engaging member 23 is biased by a coil spring (not shown) so that the engaging claw 25 engages with the position restricting piece 13.

Further, the engaging claw 25 is formed with an inclined surface 26 for guiding the position restricting piece 13 into the engaging recess 22. When the position restricting piece 13 is brought into contact with the inclined surface 26 of the engaging claw 25, the engaging member 23 is easily moved in the arrow a ₂ direction and separated from the engaging recess 22. .

  The drive unit 4 includes a piston holding member 31 for holding one end of the piston member 12 and a drive motor (not shown) that reciprocates the piston holding member 31. The drive unit 4 continuously reciprocates the piston member 12 through the piston holding member 31 by driving the drive motor with a predetermined pulse.

  Moreover, although not shown in figure, the chemical | medical solution injection apparatus 1 is electrically connected to the display apparatus which displays the injection | pouring state by the syringe 2. As shown in FIG. This display device includes, for example, three display lamps (not shown) of light blue, green, and orange, and each display lamp blinks by a control unit (not shown) electrically connected to the drive unit 4. Control the state. For example, a light emitting diode (LED) is used as the display lamp. The control unit calculates the total injection amount based on the number of injections by the reciprocation of the piston member 12, and sequentially flashes the display lamps corresponding to the total injection amount.

  About the chemical | medical solution injection device 1 comprised as mentioned above, the operation | movement with which the syringe 2 is mounted | worn in the syringe mounting part 3, and the operation | movement which inject | pours a chemical | medical solution to a patient are each demonstrated.

First, when the syringe 2 is placed in the placement recess 21 of the syringe mounting portion 3, one side of the position regulating piece 13 is brought into contact with the inclined surface 26 of the engaging member 23, and the position regulating piece 13 is inclined. By sliding along the surface 26, the engagement claw 25 is moved in the direction of the arrow a ₂ and separated from the engagement recess 22. Once the engaging claw 25 is moved in the arrow a ₂ direction and separated from the engaging recess 22, the engaging claw 25 is moved in the arrow a ₁ direction on one side of the position regulating piece 13 by the biasing force of the coil spring. Moved and engaged. Therefore, when the syringe 2 is mounted in the syringe mounting portion 3, the engagement member 23 is engaged with the position restricting piece 13, and the floating in the syringe mounting portion 3 is restricted.

Meanwhile, when removing the syringe 2 mounted on the syringe mounting part 3, by sliding operation of the arrow a ₂ direction against the engagement member 23 to the bias of the coil spring, the position regulating piece 13 and the engaging claw 25 Is easily released. Although not shown, the engaging member 23 may be configured to be moved in the direction of the arrow a ₂ , for example, via a moving mechanism.

  Then, the chemical injection device 1 in which the syringe 2 is mounted in the syringe mounting portion 3 is disposed in the syringe 2 from the chemical solution tank via the supply tube 18 as the piston member 12 is slid by the drive portion 4. Is filled with chemicals. Subsequently, as the piston member 12 is slid by the driving unit 4, the drug solution injector 1 is filled with a drug solution from the syringe 2 through the injection tube 19 to the patient. The medicinal solution injecting apparatus 1 injects a predetermined amount of medicinal solution into a patient by continuously repeating a series of operations including the above filling operation and injecting operation.

  Finally, an example of the blinking operation of each display lamp of the display device described above will be described with reference to the drawings.

  When, for example, 100 mL of a chemical solution is injected using the chemical solution injection device 1, as shown in FIG. 4, the injection operation starts from step 101, and the light blue LED blinks simultaneously with the start of injection by the control unit (step 102). . When the total injection amount of the chemical solution reaches 25 mL, as shown in step 103, when the injection operation is temporarily stopped, the process proceeds to step 111 in FIG. If the injection operation has not been temporarily stopped, the green LED is blinked by the control unit when the total injection amount becomes 50 mL or more (step 104).

  When the total injection amount of the chemical solution reaches 75 mL, as shown in step 105, when the injection operation is temporarily stopped, the process proceeds to step 131 in FIG. When the injection operation is not temporarily stopped, the orange LED is blinked by the control unit when the total injection amount becomes 90 mL or more (step 106).

  When the total injection amount of the chemical solution reaches 95 mL, as shown in step 107, when the injection operation is temporarily stopped, the process proceeds to step 151 in FIG. If the injection operation is not temporarily stopped, the injection operation by the drive unit 4 is stopped by the control unit when the total injection amount reaches 100 mL, and the calculation process of the total injection amount is reset (step 108). The injection operation ends (step 109).

  When the injection operation is temporarily stopped in step 103 described above, as shown in FIG. 5, the control unit determines whether or not the injection operation is started after the calculation process of the total injection amount is reset (step). 111).

  When the calculation process of the total injection amount is reset in step 111, the control unit sets the total injection amount to 0 mL and blinks the light blue LED (step 112). Thereafter, when the total injection amount becomes 50 mL or more, the green LED blinks (step 113), when the total injection amount becomes 90 mL or more, the orange LED blinks (step 114), and the total injection amount reaches 100 mL. When this happens, it is reset (step 115), and the injection operation ends (step 116).

  On the other hand, when the calculation process of the total injection amount is not reset in Step 111, the control unit continues the total injection amount to 25 mL and blinks the light blue LED (Step 122). Thereafter, when the total injection amount becomes 50 mL or more, the green LED blinks (step 123), when the total injection amount becomes 90 mL or more, the orange LED blinks (step 124), and the total injection amount reaches 100 mL. When this happens, it is reset (step 125), and the injection operation ends (step 126).

  Similarly, when the injection operation is temporarily stopped in step 105 described above, as shown in FIG. 6, the control unit determines whether or not the injection operation is started after the calculation process of the total injection amount is reset. (Step 131).

  When the calculation process of the total injection amount is reset in step 131, the control unit sets the total injection amount to 0 mL and blinks the light blue LED (step 132). Thereafter, when the total injection volume becomes 50 mL or more, the green LED blinks (step 133), when the total injection volume becomes 90 mL or more, the orange LED flashes (step 134), and the total injection volume reaches 100 mL. When this happens, it is reset (step 135), and the injection operation ends (step 136).

  On the other hand, when the calculation process of the total injection amount is not reset in step 131, the control unit continues the total injection amount to 75 mL, the green LED blinks (step 142), and the total injection amount becomes 90 mL or more. When this occurs, the orange LED blinks (step 144), and is reset when the total injection amount reaches 100 mL (step 145), and the injection operation ends (step 146).

  Similarly, when the injection operation is temporarily stopped in step 107 described above, as shown in FIG. 7, the control unit determines whether or not the injection operation is started after the calculation process of the total injection amount is reset. (Step 151).

If Step 1 5 1 calculation process of the total injection amount is reset, the control unit, the total injection amount as 0 mL, blinks the blue LED (step 152). Thereafter, when the total injection amount becomes 50 mL or more, the green LED blinks (step 153), when the total injection amount becomes 90 mL or more, the orange LED blinks (step 154), and the total injection amount reaches 100 mL. When this happens, it is reset (step 155), and the injection operation ends (step 156).

  On the other hand, when the calculation process of the total injection amount is not reset in step 151, the control unit continues the total injection amount to 95 mL, the orange LED blinks (step 162), and the total injection amount becomes 100 mL. Sometimes reset (step 165), the injection operation is terminated (step 166).

  Therefore, according to the display device, even when the injection operation is temporarily stopped, the total injection amount can be confirmed by the blinking state of each display lamp.

  As described above, according to the syringe 2 and the chemical liquid injector 1, the position restricting piece 13 provided in the syringe 2 is engaged with the engaging recess 22 of the syringe mounting unit 3, thereby It is possible to reliably prevent the syringe 2 attached to the piston 2 from floating in the sliding direction of the piston member 12 and rotating around the axis in the sliding direction of the piston member 12. For this reason, according to the syringe 2 and the chemical | medical solution injection apparatus 1, it can prevent reliably that the injection amount of a chemical | medical solution is fluctuate | varied and can improve the reliability of injection | pouring operation | movement.

It is a perspective view which shows the chemical injection device concerning this invention. It is a perspective view which shows the principal part of the said chemical | medical solution injection apparatus. It is a disassembled perspective view which shows the principal part of the said chemical injection device. It is a flowchart for demonstrating the blinking state of each display lamp of a display part. It is a flowchart for demonstrating the blinking state of each display lamp after a total injection | pouring amount is temporarily stopped by 25 mL. It is a flowchart for demonstrating the blink state of each display lamp after the total injection | pouring amount is temporarily stopped by 75 mL. It is a flowchart for demonstrating the blink state of each display lamp after a total injection | pouring amount is temporarily stopped at 95 mL.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Chemical liquid injection device 2 Syringe 3 Syringe mounting part 4 Drive part 5 Operation part 11 Cylinder member 12 Piston member 13 Position control piece 17 Flow path switching valve 18 Supply tube 19 Injection tube 21 Mounting recessed part 22 Engaging recessed part 23 Engagement Member 25 engaging claw 26 inclined surface 31 piston holding member

Claims (3)

The piston member includes a syringe mounting portion to which a syringe having a cylinder member and a piston member is mounted, the cylinder member mounted on the syringe mounting portion is filled with a chemical solution, and an operation of injecting the chemical solution into a patient is performed. A chemical injection device for continuously and repeatedly performing the reciprocating motion of
A plurality of display lamps having different emission colors;
A control unit that calculates a total injection amount based on the number of injections by reciprocating movement of the piston member, and sequentially blinks the display lamps corresponding to the total injection amount;
I have a,
On the peripheral surface of the cylinder member, a flat plate-shaped restricting portion for restricting the mounting position of the cylinder member mounted on the cylinder mounting portion is formed with a long side parallel to the moving direction of the piston member, and Provided so as to be in contact with the outer peripheral surface of the cylinder member at the center of the short side perpendicular to the moving direction of the piston member;
The syringe mounting portion has an engagement recess with which the restriction portion is engaged, and an engagement position engaged with the restriction portion and a release position where the engagement state between the restriction portion is released. The liquid injector is provided with an engaging portion provided with an engaging member movably provided on the cylinder, and a mounting recess in which the cylinder member is mounted with the restricting portion facing upward. . The chemical liquid injector according to claim 1 , wherein the engaging member has an engaging claw that is biased to engage with the restricting portion. Liquid injector according to claim 1 or 2 comprising a drive means for reciprocating the piston member by a pulse for moving the cylinder member of the syringe.

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