JP2018122034A - Syringe holder, medical solution injection device, and use method of medical solution injection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a syringe holder dispensing with an expensive drive device and yet being usable without disturbing a magnetic field even under magnetic field environment such as an MRI apparatus, and a medical solution injection device and use method of the medical solution injection device.SOLUTION: A medical solution injection device 1 includes: a syringe holder 4 consisting of a non-magnetic substance; a first syringe 2 inserted into a recess 42 formed on the syringe holder 4 and filled with a driving fluid; and a second syringe 3 filled with a medical solution. A first small-diameter hole of the first syringe 2 is connected with a syringe pump 6 that delivers the driving fluid via a flexible tube 5 to the first syringe 2. In this state, when the driving fluid delivered from the syringe pump 6 is sucked by the first syringe 2, a first plunger 22 of the first syringe 2 is moved in the axial direction, and accordingly, the medical solution filling the second syringe 3 is discharged from a second small-diameter hole 311.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a syringe holder, a chemical liquid injector, and a method of using the chemical liquid injector. Specifically, the present invention relates to a syringe holder, a chemical liquid injector, and a method of using the chemical liquid injector that can be used without disturbing the magnetic field even in a magnetic field environment such as an MRI apparatus without requiring an expensive drive device. is there.

  Conventionally, medical diagnostic imaging apparatuses include a CT (Computed Tomography) scanner, an MRI (Magnetic Resonance Imaging) apparatus, a PET (Positron Emission Tomography) apparatus, an angiography apparatus, and an MRA (MRAngio) apparatus. When taking a fluoroscopic image of a subject using these devices, a fixed amount of a chemical solution such as a contrast medium, physiological saline, or a sleeping agent is often injected by a syringe pump.

  However, since a general syringe pump for injection uses a magnetic motor or the like, for example, when approaching an MRI apparatus in a strong magnetic field environment, the syringe pump is attracted with a strong force, which is dangerous. In addition, the magnetic body of the pump disturbs the magnetic field of the MRI apparatus, and the electric field of the pump gives electric noise to the detection signal of the MRI apparatus, so that there is a problem that it cannot be installed near the MRI apparatus.

  Therefore, conventionally, when using a syringe pump made of a magnetic material as a general-purpose product, in order to avoid the influence on the magnetic field of the MRI apparatus, the MRI far from the examination room where the MRI apparatus is installed. From the outside of the magnetic field environment, the method of extending the tube of the injection needle and injecting the drug solution to the subject has been performed.

  However, according to this method, the length of the tube from the syringe pump to the injection needle becomes very long, and waste is generated by the amount of the chemical solution accumulated in the tube. In particular, many chemicals used in MRI examinations are expensive and extremely inefficient. In addition, the work of discharging the chemical liquid accumulated in the tube has been a heavy burden on the operator.

  With respect to such a problem, Patent Document 1 discloses a syringe pump for use in a magnetic field environment.

  Specifically, as shown in FIG. 7, a syringe holder 104 that holds the cylinder portion 103 of the syringe 102, a drive motor that generates power corresponding to the supplied electric power, and a piston 105 of the held syringe 102. A syringe pump 101 is disclosed in which a slider mechanism 106 that is slid by the power of a drive motor is made of a non-magnetic material that does not generate a magnetic field.

JP 2003-290348 A

  According to the syringe pump described in Patent Document 1, since the whole is a non-magnetic material, even when used in the MRI room, the syringe pump is attracted to the magnetic field of the MRI apparatus or disturbs the magnetic field of the MRI apparatus. There is no fear of it. However, the syringe pump of Patent Document 1 uses a phosphor bronze alloy, a titanium alloy, or a magnesium alloy as a non-magnetic material, and the syringe pump itself is expensive and is manufactured through complicated processes. Therefore, the manufacturing cost is very high.

  The present invention was devised in view of the above points, and does not require an expensive drive device, and can be used without disturbing the magnetic field even in a magnetic field environment such as an MRI apparatus, a chemical solution, It is an object of the present invention to provide an injection device and a method of using the chemical liquid injection device.

  In order to achieve the above object, the syringe holder of the present invention has a long hole shape having a predetermined length extending from one end to the other end in one direction, and has a cross-section having a predetermined depth. A U-shaped first recess, which is connected to the other end of the first recess, is a predetermined depth deeper than the first recess, and extends in a direction substantially orthogonal to one direction. The first slit portion, one end of which is connected to the first slit portion, has a long hole shape having a predetermined length extending from one end to the other end in one direction, and the depth is the first A second recess having a substantially U-shaped cross-section that is substantially the same as the first recess, connected to the other end of the second recess, substantially the same as the depth of the first slit, and in one direction A second slit portion having a predetermined length extending in a substantially orthogonal direction, one end thereof being connected to the second slit portion. A third recess having a long hole shape having a predetermined length extending in one direction from one end to the other end and having a substantially the same cross section as the first recess. Is formed on a non-magnetic base member.

  Here, a first concave portion having a predetermined length extending in one direction from one end to the other end and having a predetermined depth and having a substantially U-shaped cross section having a predetermined depth is formed in the base member. By doing so, for example, the cylinder of the first syringe to be held can be fitted into the first recess.

  The first slit portion connected to the other end of the first recess and having a predetermined depth deeper than the first recess and extending in a direction substantially orthogonal to the one direction is formed in the base member. By forming, the flange part provided in the end of the cylinder part of one syringe which should be hold | maintained, for example can be inserted by this 1st slit part.

  Further, one end is connected to the first slit portion, has a long hole shape having a predetermined length extending from one end to the other end in one direction, and the depth is substantially the same as the first recess. Since the second concave portion having the same U-shaped cross section is formed in the base member, for example, the plunger portion of one syringe to be held and the plunger portion of the other cylinder are respectively Can be fitted into the recess.

  A second slit portion having a predetermined length that is connected to the other end of the second recess and is substantially the same as the depth of the first slit portion and extends in a direction substantially orthogonal to the one direction is formed on the base member. By being formed, for example, a flange portion provided at one end of the cylinder portion of the other syringe to be held can be fitted into the second slit portion.

  The one end is connected to the second slit portion, has a long hole shape having a predetermined length extending from one end to the other end in one direction, and the depth is substantially the same as the first recess. Since the third concave portion having a substantially U-shaped cross section is formed in the base member, for example, the cylinder portion of the other syringe to be held can be fitted into the third concave portion.

  Further, since the base member is a non-magnetic material, the magnetic field of the MRI apparatus is not affected by the base member, so that the base member can be installed near the MRI apparatus.

  In order to achieve the above-mentioned object, a chemical injection device according to the present invention includes a first plunger portion having a first piston portion at one end and a first operation portion at the other end, and a first small diameter hole at one end. A cylindrical first cylinder portion having a first large-diameter hole portion through which the first piston portion is inserted at the other end, a second piston portion at one end, and a second piston portion at the other end A second cylindrical portion having a second plunger portion having an operation portion, a second small-diameter hole portion at one end, and a first large-diameter hole portion through which the second piston portion is inserted at the other end. And a first recess in which the first cylinder portion is accommodated, the first recess being adjacent to the longitudinal direction of the first recess, and the first recess being adjacent to the longitudinal direction of the first recess. The first plunger portion has a long hole shape along the longitudinal direction of the first plunger portion and the second plunger portion. A second concave portion in which the second plunger portion is accommodated, and is formed in a long hole shape adjacent to the longitudinal direction of the second concave portion along the axial direction of the second cylinder portion, and the second cylinder A syringe holder in which a third recess for housing the portion is formed in a non-magnetic base member, and a flexible tube having one end connected to the first small-diameter hole portion of the first cylinder portion. .

  Here, by providing a first plunger portion having a first piston portion at one end and a first operation portion at the other end, the first plunger portion is pushed and pulled in the first cylinder portion described later. It can be moved by operation.

  In addition, since the first small diameter hole is formed at one end of the first cylinder, for example, the first plunger is moved from the outside into the first cylinder through the first small diameter. The driving fluid can be inhaled.

  Further, the first large-diameter hole portion through which the first piston portion is inserted is formed at the other end of the first cylinder portion, so that the first piston portion is inserted into the first large-diameter hole portion. The first piston portion can be slid in the first cylinder portion.

  Further, by providing a second plunger portion having a second piston portion at one end and a second operation portion at the other end, the second plunger portion is pushed and pulled in a second cylinder portion to be described later. Can be moved.

  In addition, since the second small diameter hole is formed at one end of the second cylinder part, for example, the fluid filled in the second cylinder part can be discharged to the outside.

  Further, the second large-diameter hole portion through which the second piston portion is inserted is formed at the other end of the second cylinder portion, so that the second piston portion is inserted into the second large-diameter hole portion. And the 2nd piston part can be slid in a 2nd cylinder part, and the fluid with which the 2nd cylinder part was filled can be discharged outside.

  Further, the first recess is formed in the base member by forming a first recess having a long hole shape along the axial direction of the first cylinder portion and accommodating the first cylinder portion. The cylinder portion can be inserted and held.

  Moreover, it is a long hole shape adjacent to the base member in the longitudinal direction of the first concave portion and along the longitudinal direction of the first plunger portion and the second plunger portion, and the first plunger portion and the second plunger portion. By forming the second concave portion in which the plunger portion is accommodated, the first plunger portion and the second plunger portion can be fitted and held in the second concave portion.

  The base member is formed with a long hole shape adjacent to the longitudinal direction of the second concave portion along the axial direction of the second cylinder portion, and a third concave portion for accommodating the second cylinder portion. Thus, the second cylinder portion can be fitted and held in the third recess.

  Further, since the base member is a non-magnetic material, the magnetic field of the MRI apparatus is not affected by the base member, so that the base member can be installed near the MRI apparatus.

  Further, in the case where a flexible tube connected at one end to the first small-diameter hole portion of the first cylinder portion is provided, the first cylinder is passed through the first small-diameter hole portion of the first cylinder portion from the flexible tube. Fluid can be sucked into the section.

  In order to achieve the above-described object, the chemical injection device of the present invention includes a plunger portion including a first piston portion at one end and a second piston portion at the other end, and a first portion through which fluid is sucked into one end. A cylindrical first cylinder portion in which a first small-diameter hole portion is formed and a first large-diameter hole portion in which the first piston portion is inserted at the other end is formed, and fluid is discharged to one end. A cylindrical second cylinder part in which a second small diameter hole part is formed and a second large diameter hole part through which the second piston part is inserted is formed at the other end, and the first cylinder part A long hole shape along the axial direction of the first concave portion in which the first cylinder portion is accommodated, and a long hole shape adjacent to the longitudinal direction of the first concave portion along the longitudinal direction of the plunger portion And a second recess in which the plunger portion is accommodated, adjacent to the longitudinal direction of the second recess, and A syringe holder having a long hole shape along the axial direction of the second cylinder portion and having a third recess in which the second cylinder portion is accommodated formed in a non-magnetic base member; And a flexible tube connected to the first small-diameter hole portion of the cylinder portion.

  Here, by having a plunger portion including a first piston portion at one end and a second piston portion at the other end, the first piston inside the first cylinder portion and the second cylinder portion, which will be described later, is provided. The part and the second piston part can be slid.

  Further, since the first small diameter hole is formed at one end of the first cylinder part, for example, a drive for moving the plunger part into the first cylinder part from the outside through the first small diameter hole part. Fluid can be inhaled.

  Further, the first large-diameter hole portion through which the first piston portion is inserted is formed at the other end of the first cylinder portion, so that the first piston portion is inserted into the first large-diameter hole portion. The first piston portion can be slid in the first cylinder portion.

  In addition, since the second small-diameter hole is formed at one end of the second cylinder part, the fluid filled in the second cylinder part can be discharged to the outside.

  In addition, the second large-diameter hole portion through which the second piston portion is inserted is formed at the other end of the second cylinder portion, so that the second piston is inserted into the second large-diameter hole portion. The second piston part can be slid in the second cylinder part, and the fluid filled in the second cylinder part can be discharged to the outside.

  In addition, since the base member has a long hole shape along the axial direction of the first cylinder portion and the first concave portion in which the first cylinder portion is accommodated, the first concave portion is provided with the first concave portion. The cylinder portion can be inserted and held.

  Further, the base member has a long hole shape adjacent to the longitudinal direction of the first recessed portion and extending along the longitudinal direction of the plunger portion, and has a second recessed portion in which the plunger portion is accommodated. The plunger portion can be fitted and held in the two recesses.

  The base member is formed with a long hole shape adjacent to the longitudinal direction of the second concave portion along the axial direction of the second cylinder portion, and a third concave portion for accommodating the second cylinder portion. Thus, the second cylinder portion can be fitted and held in the third recess.

  Further, since the base member is a non-magnetic material, the magnetic field of the MRI apparatus is not affected even when the base member is in the vicinity of the MRI apparatus.

  Further, by providing a flexible tube having one end connected to the first small-diameter hole portion of the first cylinder portion, the first cylinder portion passes through the first small-diameter hole portion of the first cylinder portion from the flexible tube. Can inhale fluid.

  In addition, the other end of the first cylinder portion includes a first flange portion, and when the syringe holder is formed with a first slit portion into which the first flange portion is inserted, Since the first flange portion is fitted and held in the first slit portion, the movement of the first cylinder portion in the axial direction is restricted, and the first cylinder portion is more firmly fixed to the syringe holder. It becomes.

  In addition, when the first concave portion and the second concave portion are connected via the first slit portion, the first concave portion, the second concave portion, and the first slit portion are integrally formed. Therefore, the processing becomes easy.

  In addition, the other end of the second cylinder part includes a first flange part, and when the syringe holder is formed with a second slit part into which the second flange part is inserted, Since the second flange portion is fitted and held in the second slit portion, the movement of the second cylinder portion in the axial direction is restricted, and the second cylinder portion is more firmly fixed to the syringe holder. It becomes.

  Further, when the second concave portion and the third concave portion are connected via the second slit portion, the second concave portion, the third concave portion, and the second slit portion are integrally formed. Therefore, the processing becomes easy.

  Further, when the first operation unit and the second operation unit are in contact with each other in the second recess, the second operation unit is pressed by the first operation unit, and the second operation unit is pressed. The pressing operation of the plunger part becomes easy.

  Moreover, when it has the syringe pump connected to the other end of a flexible tube, the fluid sent from a syringe pump can be sent in in a 1st cylinder part through a flexible tube.

  The syringe pump includes a third plunger portion including a third piston portion at one end and a third operation portion at the other end, a third small-diameter hole portion through which fluid is sucked at one end, and the other end at the other end. A cylindrical third cylinder portion having a third large-diameter hole portion through which the third plunger portion is inserted, and the other end of the flexible tube is connected to the third small-diameter hole portion; If it is, the fluid can be fed from the syringe pump into the first cylinder part through the flexible tube by a simple operation.

  In order to achieve the above object, the method of using the chemical injection device of the present invention includes a driving fluid discharge step of discharging a driving fluid from a syringe pump, and a flexible tube that discharges the driving fluid discharged in the driving fluid discharge step. Driving fluid suction step for sucking into a first small-diameter hole formed on one end side of the cylindrical first cylinder portion, and a first large-diameter formed on the other end side of the first cylinder portion A first plan for moving the first plunger portion inserted through the hole portion from the first small-diameter hole portion side of the first cylinder portion to the first large-diameter hole portion side by the driving fluid. By the jar part moving step and the first plunger part moved in the first plunger part moving step, the second large-diameter hole formed on one end side in the cylindrical second cylinder part Second plastic that presses the inserted second plunger part The jar portion pressing step and the second plunger portion pressed in the second plunger portion pressing step from the second large-diameter hole side of the second cylinder portion to the second cylinder portion The second plunger portion moving step for moving to the second small-diameter hole portion formed at the other end, and the second plunger portion moved in the second plunger portion moving step causes the second plunger portion to move. A chemical solution discharging step of discharging the chemical solution filled in the cylinder portion from the second small diameter hole portion.

  Here, by providing the driving fluid discharge step of discharging the driving fluid from the syringe pump, the driving fluid filled in the syringe pump can be discharged to the outside.

  A driving fluid suction step of sucking the driving fluid discharged in the driving fluid discharging step into a first small-diameter hole portion formed on one end side of the cylindrical first cylinder portion through a flexible tube; The driving fluid discharged from the syringe pump can be sucked into the first cylinder part through the flexible tube.

  Further, the first plunger portion inserted through the first large-diameter hole portion formed on the other end side of the first cylinder portion is moved by the driving fluid to the first small-diameter hole portion side of the first cylinder portion. By providing the first plunger part moving step for moving the first plunger part from the first small diameter hole part side to the first large diameter hole part side from the first small diameter hole part side of the first cylinder part by the driving fluid. 1 can be moved toward the large-diameter hole.

  The second plunger inserted through the second large-diameter hole formed on one end side in the cylindrical second cylinder portion by the first plunger portion moved in the first plunger portion moving step. By providing the second plunger portion pressing step for pressing the plunger portion, the second plunger portion can be pressed by the first plunger portion.

  Further, the second plunger portion pressed in the second plunger portion pressing step is formed on the other end of the second cylinder portion from the second large-diameter hole side of the second cylinder portion. By providing a second plunger part moving step for moving to the small diameter hole part side, the second plunger part is moved from the second large diameter part hole part side of the second cylinder part to the second small diameter part hole part. Can be moved to the side.

  In addition, by providing a chemical solution discharging step of discharging the chemical solution filled in the second cylinder portion from the second small diameter hole portion by the second plunger portion moved in the second plunger portion moving step, The chemical solution filled in the second cylinder portion can be discharged to the outside by the second plunger.

  In order to achieve the above object, the method of using the chemical injection device of the present invention includes a driving fluid discharge step of discharging a driving fluid from a syringe pump, and a flexible tube that discharges the driving fluid discharged in the driving fluid discharge step. Driving fluid suction step for sucking into a first small-diameter hole portion formed on one end side of the cylindrical first cylinder portion, and a first end formed on the other end side of the first cylinder portion. The plunger portion inserted into the second large-diameter hole portion inserted into the large-diameter hole portion and having the other end formed on one end side of the second cylinder portion is moved to the first cylinder portion side by the driving fluid. The plunger portion moving step for moving the second cylinder portion from the second cylinder portion side and the plunger portion moved in the plunger portion moving step causes the chemical solution filled in the second cylinder portion to 2 on the other end of the cylinder And a chemical liquid discharge step of discharging from the second small-diameter hole portion which is.

  Here, by providing the driving fluid discharge step of discharging the driving fluid from the syringe pump, the driving fluid filled in the syringe pump can be discharged to the outside.

  In addition, by providing a driving fluid suction step for sucking the driving fluid discharged in the driving fluid discharge step into the first small diameter hole portion formed on one end side of the cylindrical first cylinder portion through the flexible tube, The driving fluid discharged from the syringe pump can be sucked into the first cylinder part through the flexible tube.

  Further, a second large diameter hole portion whose one end is inserted into a first large diameter hole portion formed on the other end side of the first cylinder portion and the other end is formed on one end side of the second cylinder portion. By providing a plunger portion moving step for moving the plunger portion inserted through the first cylinder portion side from the first cylinder portion side to the second cylinder portion side by the driving fluid, the driving fluid flows into the first cylinder portion. Therefore, the plunger part can be gradually moved from the first cylinder part side to the second cylinder part side.

  Further, the chemical liquid filled in the second cylinder part is discharged from the second small-diameter hole formed on the other end side of the second cylinder part by the plunger part moved in the plunger part moving step. By providing the chemical solution discharging step, the chemical solution filled in the second cylinder portion can be discharged to the outside.

  The syringe holder, the chemical injection device, and the method of using the chemical injection device according to the present invention do not require an expensive driving device and can be used without disturbing the magnetic field even in a magnetic field environment such as an MRI apparatus. It has become.

It is a perspective view of the chemical injection device concerning the embodiment of the present invention. It is a top view of the chemical injection device shown in FIG. It is a top view of the syringe holder which concerns on embodiment of this invention. It is a figure which shows the usage method of the chemical injection device which concerns on embodiment of this invention. It is a top view of the chemical injection device concerning other embodiments. It is a figure which shows the usage method of the chemical injection device which concerns on other embodiment. It is a figure which shows a prior art.

  Hereinafter, embodiments of the present invention relating to a syringe holder, a chemical liquid injector, and a method of using the chemical liquid injector will be described with reference to the drawings for understanding of the present invention. For convenience of explanation in each figure, in a state where the chemical solution injector 1 is installed on the installation surface, the direction from the installation surface of the chemical solution injector 1 to the upper side is the upward direction, the opposite direction of the upward direction is the downward direction, the upward direction, and An axial direction represented by a downward direction is defined as a vertical direction, and an axial direction perpendicular to the vertical direction is defined as a horizontal direction.

  First, the whole structure of the chemical injection device 1 according to the embodiment of the present invention will be described with reference to FIGS. 1 and 2. The liquid injector 1 is mainly a syringe pump in which a first syringe 2 and a second syringe 3 are fitted in a syringe holder 4 and connected to the first syringe 2 via a flexible tube 5. It is comprised from 6.

  The first syringe 2 has a first small-diameter hole portion 211 at one end, a first large-diameter hole portion 212 at the other end, and a substantially cylindrical first cylinder having a first flange portion 213. The first piston part 221 is provided at one end, and the first plunger part 22 is provided at the other end with a first operation part 222.

  The first piston portion 221 provided at one end of the first plunger portion 22 is inserted into the first large-diameter hole portion 212 of the first syringe 2, and the first piston portion 221 is The first cylinder portion 21 is slidable while closely contacting the inside.

  Here, the first cylinder portion 21 does not necessarily have the first flange portion 213. However, by having the first flange portion 213, the first syringe 2 is more firmly fixed to the syringe holder 4. Therefore, even when the first syringe 2 is operated, it is preferable that the first flange portion 213 has the first syringe 2 because there is no possibility that the first syringe 2 is detached from the syringe holder 4.

  The second syringe 3 has substantially the same shape as the first syringe 2. That is, the second small-diameter hole portion 311 at one end, the second large-diameter hole portion 312 at the other end, the substantially cylindrical second cylinder portion 31 having the second flange portion 313, and one end The second piston portion 321 is provided on the other end, and the second plunger portion 32 is provided with the second operation portion 322 on the other end.

  A second piston portion 321 provided at one end of the second plunger portion 32 is inserted into the second large-diameter hole portion 312 of the second syringe 3, and the second piston portion 321 is The second cylinder portion 31 is slidable while closely contacting the inside.

  Here, the second cylinder part 31 does not necessarily need to have the second flange part 313. However, by having the 2nd flange part 313, fixation to the syringe holder 4 of the 2nd syringe 3 becomes firmer. Therefore, even when the second syringe 3 is operated, it is preferable that the second flange portion 313 has the second syringe 3 because there is no possibility that the second syringe 3 is detached from the syringe holder 4.

  The syringe holder 4 is made of ceramic or a non-magnetic material such as a resin material. As shown in FIG. 3, a concave portion 42 having a substantially U-shaped cross section is formed at a substantially central portion of the upper surface of a base member 41 having a substantially rectangular parallelepiped shape. Has been. The concave portion 42 has a first concave portion 421, a first slit portion 422, a second concave portion 423, a second slit portion 424, and a third concave portion 425 in a straight line from one end to the other end of the base member 41 in one direction. It is formed so as to be connected to.

  Here, the syringe holder 4 does not necessarily have to be made of ceramics or a resin material. Any material can be used as long as it is a non-magnetic material that does not affect the magnetic field even when installed near the MRI apparatus.

  Further, the base member 41 does not necessarily have a substantially rectangular parallelepiped shape. Any shape may be used as long as the shape is stable when installed, such as a cubic shape.

  Further, the recess 42 does not necessarily have to be formed at the substantially central portion of the upper surface of the base member 41. The position where the recess 42 is formed can be changed as appropriate.

  The first concave portion 421 includes the first cylinder portion 21, the first slit portion 422 includes the first flange portion 213, the second slit portion 424 includes the second flange portion 313, and the third concave portion 425. The second cylinder portion 31 is inserted and inserted. Then, the movement of the first cylinder portion 21 in the axial direction is restricted by the first flange portion 213 fitted into the first slit portion 422, and the second flange portion 424 is inserted into the second slit portion 424. The flange portion 313 restricts the movement of the second cylinder portion 31 in the axial direction. In addition, the second operation portion 222 of the first plunger portion 22 and the second operation portion 322 of the second plunger portion 32 are in contact with the second recess portion 423 so as to face each other. Inserted.

  Here, the first operation unit 222 and the second operation unit 322 do not necessarily need to be fitted into the second recess 423 in a state where they are in contact with each other. The first operation unit 222 and the second operation unit 322 may be fitted into the second recess 423 with a predetermined clearance.

  The flexible tube 5 is a nylon tube having one end connected to the first small diameter hole 211 of the first cylinder portion 21 and the other end connected to a syringe pump 6 described later.

  Here, the flexible tube 5 does not necessarily need to be made of nylon. As long as it is used as a medical tube, it can be appropriately selected from known materials such as polyurethane, silicone rubber, PP and FEP.

  The syringe pump 6 includes a syringe pump main body 61 and a third syringe 62 attached to the syringe pump main body 61. The third syringe 62 has substantially the same shape as the first syringe 2 and the second syringe 3. That is, the third syringe 62 has a third small-diameter hole portion 621a at one end, a third large-diameter hole portion 621b at the other end, and a third cylindrical portion having a third flange portion 621c. Cylinder portion 621 and a third plunger portion 622 provided with a third piston portion 622a at one end and a third operation portion 622b at the other end.

  The syringe pump main body 61 discharges the driving fluid (for example, water) filled in the third cylinder part 621 to the first cylinder part 21 of the first syringe 2 through the flexible tube 5 per time. It is a device for discharging in small amounts so that the amount is appropriate.

  Next, a method of using the chemical injection device configured as described above will be described with reference to FIG.

  First, as shown in FIG. 4A, the third syringe 62 is set in the syringe pump body 61 in a state where the third syringe 62 is filled with water as the driving fluid W.

  The syringe holder 4 is fitted with the first syringe 2 filled with a fixed amount of the driving fluid W in the first recess 421, the first slit 422, and the second recess 423. Further, the second syringe 3 filled with the drug solution D according to the purpose for injecting into the subject is inserted into the second recess 423, the second slit 424, and the third recess 425. And the 1st syringe 2 and the 3rd syringe 62 are connected by the flexible tube 5, and the setting before use of the chemical injection device 1 is completed.

  In the chemical solution injector 1 set in this way, first, as shown in FIG. 4B, the driving fluid W is discharged from the syringe pump 6 to the flexible tube 5, and the first syringe 2 has the first syringe 2. The small diameter hole portion 211 is sucked into the first cylinder portion 21.

  When the driving fluid W from the syringe pump 6 is sucked into the first cylinder portion 21, the amount of the driving fluid W sucked into the first cylinder portion 21 increases, and accordingly, the first plunger portion 22 The first piston part 221 slides in the first cylinder part 21 toward the first large-diameter hole part 212 side.

  Along with the movement of the first plunger portion 22, the second operation portion 322 is pressed by the first operation portion 222, and the second piston portion 321 of the second plunger portion 32 is moved to the second cylinder portion 31. The liquid D sliding inside the second large-diameter hole 312 from the second large-diameter hole 312 toward the second small-diameter hole 311 and filled in the second cylinder 31 from the injection needle 7 is not shown in the body of the subject. Infused in small quantities.

  And as shown in FIG.4 (c), all the chemical | medical solutions D used as a required quantity with respect to a test subject are inject | poured by sliding until the 2nd piston part 321 contact | abuts to the 2nd small diameter hole part 311 side. Then, the injection of the chemical liquid D by the chemical liquid injection device 1 is completed.

  Here, it is not always necessary to use water as the driving fluid W. However, since water is inexpensive, even if the driving fluid W remains in the flexible tube 5 as a surplus, waste of the driving fluid can be minimized.

  Next, a chemical liquid injector 1 ′ according to another embodiment of the present invention will be described with reference to FIG. FIG. 5 is a plan view of a chemical liquid injector 1 ′ according to another embodiment. In FIG. 5, parts common to the chemical liquid injector 1 according to the above-described embodiment are denoted by the same reference numerals. .

  The chemical injection device 1 ′ according to this embodiment is simplified by integrating the first plunger portion 22 and the second plunger portion 32 among the components of the chemical injection device 1 according to the above-described embodiment. Is. That is, the plunger portion 22 ′ inserted into the second recess 423 has a first piston portion 221 inserted into the first large-diameter hole portion 212 of the first cylinder portion 21 at one end, The other end has a second piston portion 321 inserted into the second large-diameter hole portion 312 of the second cylinder portion 31.

  Thereby, it is not necessary to prepare each of the first plunger part 22 and the second plunger part 32, and the first cylinder part 21 and the second cylinder part 31 can be formed by one plunger part 22 ′. Axial sliding is possible.

  Next, the usage method of the chemical injection device 1 ′ according to the other embodiment will be described with reference to FIG. Similarly to the chemical solution injector 1 according to the above-described embodiment, first, as shown in FIG. 6A, the third syringe 62 is filled with water as the driving fluid W. 62 is set in the syringe pump main body 61.

  The syringe holder 4 is fitted with the first cylinder portion 21 filled with a predetermined amount of the driving fluid W in the first concave portion 421, and the first flange portion 213 is inserted into the first slit portion 422. Insert. Further, the second cylinder portion 31 filled with a predetermined amount of the chemical solution D according to the purpose for injecting into the subject is fitted into the second recess 423, and the second flange portion 313 is inserted into the second slit portion. 424 is inserted. At this time, the plunger portion 22 ′ in which the first piston portion 221 and the second piston portion 321 are inserted into both the first cylinder portion 21 and the second cylinder portion 31 is fitted in the second recess portion 423. Will be inserted. And the 1st syringe 2 and the 3rd syringe 62 are connected by the flexible tube 5, and the setting before use of the chemical injection device 1 is completed.

  In the chemical solution injector 1 set in this way, the driving fluid W is discharged from the syringe pump 6 to the flexible tube 5 and the first small-diameter hole of the first syringe 2 as shown in FIG. The air is sucked from the portion 211 into the first cylinder portion 21.

  When the driving fluid W from the syringe pump 6 is sucked into the first cylinder portion 21, the amount of the driving fluid W sucked into the first cylinder portion 21 increases, and the first of the plunger portion 22 ′ is accordingly increased. The piston portion 221 slides in the first cylinder portion 21 toward the first large-diameter hole portion 212 side.

  Along with the movement of the plunger portion 22 ′, the second piston portion 321 inserted through the second cylinder 31 passes through the second cylinder 31 from the second large-diameter hole portion 312 side to the second small-diameter hole portion. The drug solution D that moves to the 311 side and is filled in the second cylinder 31 is injected little by little into the body of the subject (not shown).

  And as shown in FIG.6 (c), the 2nd piston part 321 slides until it contacts the 2nd small diameter hole 311 side, Therefore The chemical | medical solution D used as a required quantity with respect to a subject is carried out. All are injected, and the injection of the chemical liquid D by the chemical liquid injection device 1 ′ is completed.

  As described above, the syringe holder, the chemical injection device, and the method for using the chemical injection device according to the present invention do not require an expensive driving device and can be used without disturbing the magnetic field even in a magnetic field environment such as an MRI apparatus. It is possible.

DESCRIPTION OF SYMBOLS 1, 1 'chemical | medical solution injection apparatus 2 1st syringe 21 1st cylinder part 211 1st small diameter hole part 212 1st large diameter hole part 213 1st flange part 22 1st plunger part 221 1st Piston part 222 1st operation part 22 'Plunger part 3 2nd syringe 31 2nd cylinder part 311 2nd small diameter hole part 312 2nd large diameter hole part 313 2nd flange part 32 2nd plan Jar part 321 2nd piston part 322 2nd operation part 4 Syringe holder 41 Base member 42 Recessed part 421 1st recessed part 422 1st slit part 423 2nd recessed part 424 2nd slit part 425 3rd recessed part 5 Flexible tube 6 Syringe pump 61 Syringe pump main body 62 Third syringe 621 Third cylinder part 621a Third small diameter hole part 621b Third large diameter hole part 621c 3rd flange part 622 3rd plunger part 622a 3rd piston part 622b 3rd operation part 7 Injection needle W Driving fluid D Chemical solution

Claims (10)

A first concave portion having a long hole shape having a predetermined length extending in one direction from one end to the other end and having a predetermined depth and a substantially U-shaped cross section;
A first slit portion having a predetermined length that is connected to the other end of the first concave portion, is deeper than the first concave portion, and extends in a direction substantially orthogonal to one direction;
One end is connected to the first slit portion and has a long hole shape having a predetermined length extending from one end to the other end in one direction, and the depth is substantially the same as the first recess. A second recess having a substantially U-shaped cross section,
A second slit portion having a predetermined length which is connected to the other end of the second recess and is substantially the same as the depth of the first slit portion and extends in a direction substantially perpendicular to one direction;
One end is connected to the second slit portion, has a long hole shape having a predetermined length extending in one direction from one end to the other end, and the depth is substantially the same as the first recess. A syringe holder in which a third recess having a substantially U-shaped cross section is formed on a nonmagnetic base member. A first plunger portion having a first piston portion at one end and a first operation portion at the other end;
A cylindrical first cylinder part formed with a first small diameter hole part at one end and a first large diameter hole part through which the first piston part is inserted;
A second plunger portion having a second piston portion at one end and a second operation portion at the other end;
A cylindrical second cylinder portion having a second small diameter hole portion at one end and a first large diameter hole portion through which the second piston portion is inserted at the other end;
A first recess having an elongated hole shape along the axial direction of the first cylinder portion and accommodating the first cylinder portion; and the first plunger portion adjacent to the longitudinal direction of the first recess. And a second concave portion in which the first plunger portion and the second plunger portion are accommodated, and a second concave portion of the second concave portion. A syringe holder having a long hole shape adjacent to the longitudinal direction and extending along the axial direction of the second cylinder portion, and having a third recess for accommodating the second cylinder portion formed in a non-magnetic base member When,
And a flexible tube having one end connected to the first small-diameter hole of the first cylinder portion. A plunger portion including a first piston portion at one end and a second piston portion at the other end;
A cylindrical first cylinder part formed with a first small diameter hole part at one end and a first large diameter hole part through which the first piston part is inserted;
A cylindrical second cylinder part formed with a second small diameter hole part at one end and a second large diameter hole part through which the second piston part is inserted;
A first recess having an elongated hole shape along the axial direction of the first cylinder portion, in which the first cylinder portion is accommodated, and a longitudinal direction of the plunger portion adjacent to the longitudinal direction of the first recess And a long hole shape along the axial direction of the second cylinder part adjacent to the longitudinal direction of the second concave part. And a syringe holder in which a third recess in which the second cylinder portion is accommodated is formed in a non-magnetic base member;
A chemical injection device comprising: a flexible tube having one end connected to the first small diameter hole of the first cylinder. The other end of the first cylinder part includes a first flange part,
The syringe holder is formed with a first slit portion into which the first flange portion is inserted,
The chemical solution injection device according to claim 2 or 3, wherein the first recess and the second recess are connected via the first slit portion. The other end of the second cylinder part includes a second flange part,
The syringe holder is formed with a second slit portion into which the second flange portion is fitted,
The chemical injection device according to any one of claims 2 to 4, wherein the second concave portion and the third concave portion are connected to each other through the second slit portion. The first operation unit and the second operation unit are:
The chemical solution injection device according to any one of claims 2, 4, and 5, which are in contact with each other in the second recess. The chemical injection device according to any one of claims 2 to 6, further comprising a syringe pump connected to the other end of the flexible tube. The syringe pump is
A third plunger portion including a third piston portion at one end and a third operation portion at the other end;
A third small-diameter hole portion through which fluid is discharged at one end, and a cylindrical third cylinder portion having a third large-diameter hole portion through which the third piston portion is inserted at the other end. And
The syringe device according to any one of claims 2 to 7, wherein the other end of the flexible tube is connected to the third small-diameter hole. A driving fluid discharge step of discharging the driving fluid from the syringe pump;
A driving fluid suction step for sucking the driving fluid discharged in the driving fluid discharge step into a first small-diameter hole portion formed on one end side of the cylindrical first cylinder portion through a flexible tube;
The first plunger portion inserted into the first large-diameter hole portion formed on the other end side of the first cylinder portion is moved by the drive fluid into the first small-diameter hole of the first cylinder portion. A first plunger part moving step of moving from the part side to the first large diameter hole part side;
The second plunger inserted through the second large-diameter hole formed on one end side in the cylindrical second cylinder part by the first plunger part moved in the first plunger part moving step. A second plunger portion pressing step for pressing the plunger portion;
The second plunger portion pressed in the second plunger portion pressing step is formed from the second large-diameter hole side of the second cylinder portion to the other end of the second cylinder portion. A second plunger part moving step for moving the second small diameter hole part;
A chemical solution discharging step of discharging the chemical solution filled in the second cylinder portion from the second small-diameter hole portion by the second plunger portion moved in the second plunger portion moving step; A method for using a chemical injection device. A driving fluid discharge step of discharging the driving fluid from the syringe pump;
A driving fluid suction step for sucking the driving fluid discharged in the driving fluid discharge step into a first small-diameter hole portion formed on one end side of the cylindrical first cylinder portion through a flexible tube;
One end is inserted into a first large-diameter hole formed on the other end side of the first cylinder portion, and the other end is a second large diameter formed on one end side of the cylindrical second cylinder portion. A plunger part moving step of moving the plunger part inserted through the hole part from the first cylinder part side to the second cylinder part side by the driving fluid;
A second small-diameter hole formed in the other end side of the second cylinder part by using the plunger part moved in the plunger part moving step to feed the chemical liquid filled in the second cylinder part. A method for using a chemical injection device comprising: a chemical discharge step for discharging from a liquid.

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