WO2004062713A1

WO2004062713A1 - Injection auxiliary tool

Info

Publication number: WO2004062713A1
Application number: PCT/JP2003/015602
Authority: WO
Inventors: Hideo Ohba; Masakuni Saruhashi; Yasuaki Tamakoshi
Original assignee: Konica Minolta Medical & Graphic, Inc.
Priority date: 2003-01-16
Filing date: 2003-12-05
Publication date: 2004-07-29
Also published as: AU2003289205A1

Abstract

An injection auxiliary tool detachably holding a contrast medium injector capable of injecting the contrast medium charged in a barrel by the pressing movement of a plunger and supporting the injecting operation of the held contrast medium injector, characterized by comprising a holding means holding the barrel, a pressingly moving means pressingly moving the plunger, an operating lever allowed to be operated by the fingers of a hand, and a power transmission means transmitting the operation of the operating lever to the pressingly moving means after reducing a speed and increasing a power by the principle of leverage.

Description

Description Injection / capture aid Technical field

The present invention relates to an injection aid suitable for injecting a contrast agent. Background art

Conventionally, in the medical field, when a contrast medium is injected into a blood vessel or the like, the injection has been performed using a drip, a syringe, or an automatic injection device in which a syringe is set. In this syringe, a contrast medium is injected into a blood vessel by the operation of piercing a patient's blood vessel with a syringe needle and pushing by hand. In the case where an automatic injection device is used, injection may be performed using a mechanical syringe drive mechanism (for example, see Japanese Patent Application Laid-Open No. 2001-224658 (corresponding publication: US Published Patent Application There is a method in which a contrast agent is sent out at a constant speed by a motor (for example, Japanese Patent Application Laid-Open No. 6-7440 (corresponding publication: US Patent Publication No. 5226)). In these devices, a syringe is set, the injection needle at the tip of the tube connected to the injector is pierced into the patient's blood vessel, and the device is automatically pushed. The contrast medium is injected into the blood vessel.

As a manual contrast medium injection aid, there is an OZPa1mInjector (registered trademark) of CardioVascu1arInnovavatios (registered trademark) as shown in FIG. However, this device is a device for injecting the contrast agent filled in the barrel in one operation at a stroke. It is not possible to operate with the fingers of the hand, but it is necessary to fix the bottom of the table to the operating table and press the operation pedal with the palm of your hand with considerable force.

In addition, a device for manually injecting a fixed amount of subcutaneous injection into a large number of animals, which is not a contrast medium injection capturing device, is disclosed in, for example, U.S. Pat. No. 3,110,310 and U.S. Pat. It is described in Japanese Patent Publication No. An apparatus for manually implanting a subcutaneous pellet is described in, for example, US Pat. No. 2,883,984. Also, a device for manually injecting medical pasta is disclosed in, for example, US Pat. It is described in Japanese Patent Publication No. 8778.

As described above, in the past, when a contrast medium was injected into a blood vessel, the injection was performed using a syringe, a drip or an automatic injection device. However, when the contrast medium was injected using a drip or an automatic injection device, the following problems were encountered.

(1) Even if a needle is pierced through a patient's blood vessel, the contrast agent continues to be injected and damages tissue mainly at the injection site.

(2) Even if the patient's blood vessels contract during injection due to the injection of the contrast agent, the contrast agent continues to be injected, causing tissue damage mainly at the injection site.

(3) When injecting using an automatic infusion device, even if the tube is blocked due to the patient gripping the tube between the syringe and the needle or the patient moving and crushing.

The problem of bursting the barrel of the syringe while trying to continue the injection operation.

In order to avoid such problems, it is sufficient to inject the contrast medium by operating the syringe by hand.However, the contrast medium has a large volume to be injected, and unlike a conventional therapeutic drug syringe, the cross-sectional area is different. It is necessary to use a large syringe.

And, because of the high degree, to operate the syringe by hand, it is necessary to press with a considerable force on the palm of the hand rather than with your finger, and if you want to shoot many times continuously, operate the syringe The physician and the technologist who do it can bruise on the palm of the photographer. For this reason, if the palm pressure sensation is exhausted, there is a problem that it becomes difficult to feel the fluctuation of pressure when the patient's blood vessel contracts during injection or when the tube is closed.

Thus, the present invention solves the above-mentioned problems, eliminates the need for a control device such as an automatic injection device, does not need to press the hand with a great deal of force, can perform an injection operation with the power of a finger, and achieves a patient's blood vessel If the patient's blood vessel contracts during injection or the tube is blocked due to the injection of a needle through the needle or the injection of a contrast agent, the pressure fluctuation caused by the It is an object of the present invention to provide a manually operated injection trap which can be felt with a sharp finger and can stop or slow down the injection operation. Disclosure of the invention

In order to solve the above problems and achieve the object, the present invention has the following structure. Done.

The injection capturing aid according to the present invention detachably holds a contrast agent injector capable of injecting a contrast agent filled in a barrel by pushing a plunger, and assists an injection operation of the held contrast agent injector. Injection trapping tool,

Holding means for holding the barrel,

Pushing means for pushing the plunger,

An operation lever that can be operated by a finger of a hand,

And a power transmitting means for transmitting the operation of the operation lever to the pushing means by deceleration based on the principle of leverage.

According to this injection aid, the barrel of the contrast agent injector is held by the injection aid, and the operation of the operation lever is transmitted to the pushing means by deceleration with the principle of leverage, and the barrel is pushed by the pushing means. By pushing the plunger and injecting the contrast agent filled in the barrel, the injection operation can be performed with the power of a finger, and when the injection needle is pierced through the patient's blood vessel, Even if the patient's blood vessels contract during the injection or the tube is blocked, the pressure fluctuations caused by the injection can be felt with the fingers with particularly sharp pressure, and the injection operation is stopped or stopped. It can be made. Further, in the injection assistant of the present invention, it is preferable that the initial volume of the contrast agent filled in the barrel is 40 ml or more.

According to this injection aid, since the initial volume of the contrast agent filled in the barrel is 40 ml or more, the stroke range of the plunger can be appropriately adjusted while injecting the contrast agent required for contrast agent imaging. A control device such as an automatic injection device is not required even within the range of the stroke, and there is no need to press with a great deal of force on the palm, and the injection operation can be performed with the force of a finger. In the injection / capture aid of the present invention, it is preferable that the initial volume of the contrast agent filled in the barrel is 250 ml or less.

According to this injection aid, since the initial volume of the contrast agent filled in the barrel is 250 m1 or less, the injection of the contrast agent required for contrast agent imaging is performed while Even if the stroke range is within the appropriate stroke range, there is no need for a control device such as an automatic injection device, and there is no need to press with a great deal of force on the palm, and the injection operation can be performed with the power of a finger. In the injection / capture aid of the present invention, the barrel preferably has a cross-sectional area of 3 cm ² or more.

According to this injection aid, even with manual operation, a sufficient injection speed is ensured, and a control device such as an automatic injection device is not required. Can work. In the injection / capture aid of the present invention, the barrel preferably has a cross-sectional area of 20 cm ² or less.

According to this injection aid, only the force that can be pushed manually is sufficient, there is no need for a control device such as an automatic injection device, and there is no need to press with a great deal of force on the palm, and the injection operation can be performed with the force of a finger. In the injection / capture aid of the present invention, it is preferable that a distance from a tip of the barrel to a fulcrum of a power transmission means is 40 cm or less.

According to this injection trapping device, a press when the plunger of the barrel is pushed by the pushing means is unlikely to occur, and it is easy to take and handle with the hand, and the operation with the hand is easy. In the injection / capture aid according to the present invention, it is preferable that a distance from a tip of the barrel to a fulcrum of a power transmission means is 5 cm or more.

According to this injection aid, even if the initial volume of the contrast agent filled in the barrel is sufficiently large, the contrast agent injector can be easily attached and detached. Also, in the injection assistant of the present invention, the power transmission means may be:

A rotating member that rotates around a fulcrum of the pivot by operating the operating lever; It is preferable that, when the rotating member rotates in the pushing direction, the pushing means advances to the barrel side. The turning member may be the operation lever itself, a member that turns integrally with the operation lever, or a member that turns separately from the operation lever. Is also good.

Further, it is preferable that the pushing means advances directly or indirectly to the barrel side by an action from an action point of the rotating member.

According to this housing aid, it can be pushed with a simple structure. Further, in the injection and trapping tool of the present invention, it is preferable that the distance from the fulcrum of the roller to the point of application is 0.5 cm or more.

According to this injection aid, a sufficient distance for the pushing means to be pushed by one operation can be sufficiently secured, the operation frequency of the operating lever can be reduced, and the operability is good. Further, in the injection / capture aid according to the present invention, it is preferable that a distance from a fulcrum of the roller to the point of application is 3 cm or less.

According to this injection trap, the force required to operate the operation lever can be reduced, and the operation can be performed with the force of a finger. When operated with a finger, the pressure fluctuation at the time of occurrence of an abnormality in the injection of the contrast medium can be sensed with a finger having a particularly sharp pressure interval. Further, in the injection capturing aid of the present invention, in the entire operation from the initial position of the operation lever to the maximum operation position, a direction in which the plunger is pushed by the pushing means, It is preferable that the angle between the fulcrum of the roller and the direction connecting the action point is 30 ° or more and 150 ° or less.

According to this injection trap, in all operations from the initial position of the operation lever to the maximum operation position, the direction in which the plunger is pushed by the pushing means, the fulcrum of the power transmission means, The angle between the direction connecting the point of action and the direction is 30 ° or more and 150 ° or less. Except for friction, etc., the force transmitted by the power transmission means is transmitted to the pushing means by more than the specified value. That is preferable. Further, the injection assisting device of the present invention transmits the operation of the operation lever to the pushing means in a decelerated manner during all operations from the initial position of the operation lever to the maximum operation position. It is preferable that

According to this injection trap, in all operations from the initial position of the operation lever to the maximum operation position, the operation of the operation lever is transmitted to the pushing means by decelerating force. The force required for the operation of the push lever is smaller than the force transmitted to the pushing means, and the speed at which the operating lever is operated is faster than the speed at which the pushing means moves. It is preferable because pressure fluctuation is easily felt. In addition, the injection assisting tool of the present invention is not capable of performing all the operations from the start of injection of the initial contrast agent filled in the barrel to the end of injection by one operation of the operation lever, and a plurality of operations of the operation lever. The operation from the start to the end of the injection of the initial contrast agent filled in the barrel can be performed by the operation (preferably, ^. According to this injection trapping device, the operation lever can be operated a plurality of times. It can perform everything from the start of the injection of the contrast agent initially filled in the barrel to the end of the injection, and can inject the contrast agent by grasping the operation rep with finger power. Preferably, the tool allows the barrel to be viewed in a state where the barrel is held by the holding means.

According to this injection aid, the barrel can be visually recognized while holding the barrel by the holding means, and the operator can attach the barrel to the barrel of the contrast agent injector even while operating the operation lever. The scale and the like can be seen, whereby the amount of the contrast agent to be filled can be easily confirmed. In addition, it is preferable that the injection and capture aid of the present invention is for injecting the contrast agent at an injection speed of 5 m 1 s or less on average.

According to the injection capturing aid, the contrast medium is injected at an average injection speed of 5 m1 ns or less, and more appropriate contrast imaging can be performed. Also, injection Tosukegu of the present invention, it is preferable that the contrast agent is for entering Note in 1 XI 0 ⁶ P a following injection pressure.

According to this injection capturing auxiliary tool, is of order to inject contrast at 1 X 1 0 ⁶ P a following injection pressure, to easily operate the operation lever with fingers without barrel exploding The contrast agent can be injected while the pressure fluctuation can be sensed with the fingertip. Also, the injection pressure of the contrast agent must be higher than the fluid pressure of the injection destination, such as blood pressure or pressure in the ureter. Further, it is preferable that the injection / capture aid of the present invention is for injecting the contrast agent into a urinary tract or a small vein.

The injection trap is suitable for use in injecting a contrast medium into the urinary tract or venules. Further, it is preferable that the injection assistant of the present invention is provided with a handle at a position where it can be grasped by a human hand together with the operation lever.

According to this injection aid, a handle is provided at a position where it can be grasped by a human hand together with the operation lever, and the operation lever can be operated by the operation of grasping a finger. Further, it is preferable that the injection / capture aid of the present invention can be lifted and operated by grasping the operation lever and the handle.

According to this injection capturing aid, it is possible to lift and operate by grasping the operation lever and the handle, and the operator can easily operate with his / her finger in any posture. However, the pressure fluctuation during injection of the contrast agent can be easily felt. Further, it is preferable that the injection / capture aid of the present invention is a bistor type in which the handle and the holding means are integrated.

According to this injection trap, the handle and the holding means are of a bistor type integrated with each other, and can be easily operated. Further, in the injection capturing aid of the present invention, when the holding means is openably and closably closed with a receiving portion on which the pallet of the contrast agent injector can be mounted, the holding device is mounted on the receiving portion. And a holding part for holding a part of the barrel.

According to this injection aid, the barrel of the contrast agent injector is placed on the receiving portion, and a part of the barrel is held by the holding portion, so that the attachment and detachment of the contrast agent injector is easy and simple. It can be securely held. Further, in the injection / capture aid of the present invention, it is preferable that the holding portion is a transparent body. According to this injection trap, the holding portion is a transparent body, and the amount of the contrast agent to be filled can be easily confirmed by checking the scale or the like provided on the barrel of the contrast agent injector. In the injection and capture aid of the present invention, it is preferable that the holding portion has an elastic body that presses and holds a part of the barrel.

According to this injection trap, since the holding section has the elastic body that presses and holds a part of the barrel, the barrel can be reliably pressed and held without damaging the barrel. In addition, in the injection capturing aid of the present invention, it is preferable that the barrel of the contrast agent injector has a flange on the opening side of the barrel, and the flange is brought into contact with the holding portion.

According to this injection trap, the movement of the barrel in the pressing direction can be reliably restricted by bringing the flange of the barrel into contact with the holding portion. In the injection / capture aid of the present invention, the receiving portion may have a projection, and the flange may be engaged with the projection. Further, in the injection trapping tool of the present invention, the contrast agent injector has a plunger having a head having a head engaged with the plunger, and the pressing part of the pressing means and the head of the biston are connected to each other. It is preferable to interpose an intermediate plate between them.

According to this injection trap, the pressing force from the pressing means moves the intermediate plate and the piston. The intermediate plate regulates the transmission to the plunger via the biston even if there is a shift on the pushing means side during operation. Can be. In addition, the injection capturing aid of the present invention may be configured such that the intermediate plate is engaged with an engagement sliding portion which is engaged and held movably in a pushing direction toward the holding means, and a head of the piston. It is preferable to have an engagement holding portion for holding.

According to this injection aid, the intermediate plate is movably engaged and held in the pushing direction on the holding means side, and is smoothly pushed and moved by engaging and holding the head of the biston engaged with the plunger. Can move in any direction. Further, in the injection assistant of the present invention, it is preferable that the barrel of the contrast agent injector is a transparent body and has a scale indicating the amount of the contrast agent to be filled.

According to this injection aid, since the barrel of the contrast agent injector is a transparent body and has a scale indicating the amount of the contrast agent to be filled, the amount of the contrast agent can be easily visually checked. it can. In the injection aid of the present invention, the contrast agent preferably contains a barium sulfate enema.

According to the injection capturing device, the contrast agent also includes a barium sulfate enema, and is preferably used in the medical field. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a side view of the injection trap according to the first embodiment,

Figure 2 is a perspective view of the injection aid,

Figure 3 is a plan view of the injection trap,

Figure 4 is a schematic diagram of the power transmission means,

FIG. 5 is a schematic configuration diagram showing an operation state of the power transmission means,

Fig. 6 is a perspective view before operation by the operation lever. Fig. 7 is a perspective view when operating with the operation lever.

FIG. 8 is a perspective view showing the holding means,

Figure 9 is a plan view of the barrel holder,

FIG. 10 is a cross-sectional view showing a plunger pushing state.

FIGS. 11A to 11C are side views of the contrast agent injector,

FIG. 12 is a side view showing a modified example of the injection assistant according to the first embodiment,

FIG. 13 is a diagram showing a power transmission means of the injection trap according to the second embodiment,

FIG. 14 is a side view of the injection trap according to the third embodiment,

FIG. 15 is a perspective view of an injection aid according to the third embodiment,

FIG. 16 is a plan view of the injection trap according to the third embodiment,

FIG. 17 is a perspective view showing a holding unit in the third embodiment,

FIG. 18 is a front view of the intermediate plate according to the third embodiment,

FIG. 19 is a perspective view of the intermediate plate according to the third embodiment,

20A to 20C are perspective views of the contrast agent injector according to the third embodiment,

FIG. 21 is a side view showing a modified example of the injection assistant according to the third embodiment,

FIG. 22 is a schematic configuration diagram of a power transmission unit according to the fourth embodiment,

FIG. 23 is a schematic configuration diagram showing an operation state of the power transmission means in the fourth embodiment, and FIG. 24 is a diagram showing a conventional manual contrast medium injection aid. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an embodiment of the injection assistant of the present invention will be described in detail with reference to the drawings, but the present invention is not limited to this embodiment. Further, the embodiments of the present invention show the most preferable embodiments of the present invention, and the meaning of the terms of the present invention is not limited thereto.

`` Embodiment 1 J

Fig. 1 is a side view of the injection and trapping device in the first embodiment, Fig. 2 is a perspective view of the injection and injection device, Fig. 3 is a plan view of the injection and injection device, Fig. 4 is a schematic configuration diagram of power transmission means, and Fig. FIG. 6 is a schematic configuration diagram showing an operating state of the transmission means. FIG. 6 is a perspective view before operation by an operation lever. 7 is a perspective view at the time of operation by the operation lever, FIG. 8 is a perspective view showing the holding means, FIG. 9 is a plan view of the barrel holding portion, FIG. 10 is a cross-sectional view showing a plunger pushing state, FIG. A to l 1 C are side views of the contrast agent injector.

The injection capturing aid 1 of this embodiment includes a holding means 10, a pushing means 20, an operation repeller 30, and a power transmission means 40, and performs an injection operation of the contrast agent injector 50. Assist.

This contrast agent injector 50 includes a barrel 51 and a plunger 52 as shown in FIGS. 11A to 11C. The barrel 51 is filled with a predetermined amount of a contrast agent, the discharge port 51a of the barrel 51 is closed with a cap 51b, and the cap 51b is removed to use the injection pipe 53 when used. Connecting. An injection needle (not shown) is connected to the other end of the injection pipe 53.

The barrel 51 is formed of a transparent body such as a transparent resin or transparent glass, and has a flange 5lc on the opening side. A label 55 having a scale 54 indicating the amount of the contrast agent to be filled is adhered to the barrel 51 so that the amount of the contrast agent can be easily confirmed visually.

In the plunger 52, a screw hole 52a is formed on the opening side of the barrel 51. As shown in FIGS. 9 and 10, the screw hole 52a is provided at the tip of the mouth 21 forming the pushing means 20. The screw portion 21a1 of the pressing portion 21a is detachably screwed. The pressing portion 21a has a pressing flange portion 21a2 formed at the base of the screw portion 21a1, and the outer diameter D1 of the pressing flange portion 21a2 is the hole diameter of the screw hole portion 52a. The diameter is larger than D2 and smaller than the inner diameter D3 of barrel 51.

By rotating the rod 21 and screwing the screw portion 21a1 into the screw hole portion 52a, the pressing flange portion 21a2 comes into contact with the pressing surface 52b of the plunger 52. The plunger 52 can be pushed.

In this state, the plunger 52 slides in the barrel 51, and the contrast agent in the barrel 51 is injected from the injection pipe 53 connected to the outlet 51a of the barrel 51. In the injection trapping tool of this embodiment, the contrast agent injector 50 is exchangeably held, so that the work of replacing the contrast agent injector 50 is good.

This drug injector 50 is for 100 ml (Fig. 11A) and for 80 ml (Fig. 11B, 5 For Om1 (Figure 11C is shown, the initial volume of contrast agent filled in the barrel 51 should be at least 4 Oml, especially at least 7 Om1. Even though the contrast agent required for imaging can be injected, even if the stroke range of the plunger 52 is within an appropriate range, there is no need to press with a great deal of force on the palm, and the injection operation can be performed with the force of a finger, and the contrast Pressure fluctuations at the time of abnormal occurrence during drug injection can be felt with a finger having a particularly sharp pressure sensation, which is preferable.

In addition, when the initial volume of the contrast agent filled in the barrel 51 is 250 ml or less, particularly 160 m1 or less, the stroke range of the plunger 52 is kept within an appropriate range. It is preferable because the injection operation can be performed with the force of. Also, the cross-sectional area of the barrel 51 should be 3 cm ² or more, especially 7 cm ² or more. Without the injection trap, it is necessary to press with a palm with a considerable force. It is unnecessary, and the stroke range of the plunger 52 is within the appropriate stroke range for the volume of the contrast agent required for the contrast agent imaging. The pressure fluctuation at the time of occurrence of an abnormality can be sensed with the fingers of the hand whose pressure is particularly sharp, which is preferable. As the cross-sectional area of the apparel 5 1, ² 0 cm 2 or less, to be particularly 1 5 cm ² hereinafter, less burden on the device, and can be injection operation by the force of a finger, Note morphism in contrast agents It is preferable because the pressure change when an abnormality occurs can be sensed with the fingers of the hand whose pressure sense is particularly sharp.

The contrast agent to be filled in the barrel 51 can be used as a contrast agent, for example, as shown in Table 1. In particular, it is preferably used as a contrast agent for radiography.

Generic name Brand name Norenore material Oipalomin Konica Cyclic polyolefin Iopamidol

Iopamilon Japan Ring Glass

Iopark Konica reclaimed polyolefin ihexol

OMNIPARK Polypropylene iobersol Optiray Yamanouchi Pharmaceutical Cyclic polyolefin Iomeprol Iomeron Eisa Cyclic polyolefin iopromide Proscope Tanabe Pharmaceutical Glass It has a portion 11 and a holding portion 12 which can be opened and closed with respect to the receiving portion 11. The barrel 51 is pressed toward the receiving portion 11 by closing the holding portion 12 while the barrel 51 is placed on the receiving portion 11. The receiving portion 11 is fixed to a guide body 2, and the guide body 2 is fixed to a handle 3. Thus, the injection aid 1 is a piston type in which the handle 3 and the holding means 10 are integrated.

As shown in FIG. 8, the receiving portion 11 and the holding portion 12 are formed in a shape in which a transparent resin cylinder is divided in the axial direction, and the holding portion 12 is formed shorter than the receiving portion 11. One end of the holding portion 12 can be opened and closed with respect to the receiving portion 11 with the hinge 13 as a fulcrum, and the claw portion 14 at the other end is engaged with the locking portion 15 of the receiving portion 11. Fixed.

The barrel 51 of the contrast agent injector 50 is placed on the receiving part 11 and a part of the barrel 51 is held by the holding part 12, so that the contrast agent injector 50 can be easily attached and detached. Moreover, it can be easily and securely held.

Further, the receiving part 11 and the holding part 12 are transparent, and the barrel 51 of the contrast agent injector 50 is visible. The scale and the like provided on the barrel 51 of the agent injector 50 can be seen, whereby the liquid amount of the contrast agent to be filled can be easily confirmed.

Further, the holding portion 12 has an engagement groove 12 b formed on the pressing surface 12 a side. The elastic body 16 is embedded in and engaged with the groove 12b. By closing and fixing the holding portion 12, the elastic body 16 can press and hold a part of the barrel 51, and can surely press and hold the barrel 51 without damaging the barrel 51. The elastic body 16 uses a flexible resin pipe, but may be made of rubber or the like. Further, the elastic body 16 is provided at one place in this embodiment, but may be provided at a plurality of places, or may be provided on the entire pressing surface 12a.

In addition, the flange 51c is brought into contact with the end 11a of the receiving portion 11 and the end 12c of the holding portion 12 on the opening side of the barrel 51, thereby pressing the barrel 51. The movement in the direction can be reliably regulated. In addition, with the barrel 51 held by the holding portion 12 and the stopper 34 released, the knob 23 of the rod 21 is slightly pulled to pull the plunger 52 and blood is injected. By visually checking the inflow into the pipe 53, it can be confirmed whether the tip of the injection needle has entered the blood vessel.

The pushing means 20 provided in the injection aid 1 includes a rod 21, a pressing portion 21 a provided at the tip of the rod 21, and a knob 2 attached to the head of the rod 21. The rod 21 is provided movably on the guide body 2.

The operation lever 30 provided in the injection trapping tool 1 also functions as a rotation member that rotates around the fulcrum O1 of the roller by operating the operation lever 30. The support shaft 35 fixed to the handle 3 penetrates the grip 30 a on the side gripped by the finger of the operation leopard 30, and the support shaft 35 fixed to the handle 3. It is provided rotatably at the center. By operating the operating lever 30 by gripping the grip portion 30a, it functions as the fulcrum O1 of the armature.

Both the handle 3 and the operation lever 30 are provided at positions where they can be gripped by a human hand. As a result, the handle 3 is gripped by the thumb of one hand, the operating lever 30 is gripped by the other four fingers, and the operating lever 30 is operated by hand power by pulling the handle 3.

That is, the operation lever 30 can be operated by the operation of grasping the finger. It is also possible to lift and operate by gripping the operation lever 30 and the handle 3. Therefore, regardless of the posture of the operator, the operator can easily operate with his / her finger, and can easily feel the pressure fluctuation during the injection of the contrast agent. The power transmission means 40 provided in the injection assistant 1 decelerates and transmits the operation of the operation hopper 30 to the pushing means 20 based on the principle of leverage. As shown in FIGS. 4 and 5, the power transmission means 40 is moved by being pushed by the operation lever 30 and the operation part 30 b of the operation lever 30 around the lever fulcrum O 1. A chucking plate 32, and the chucking plate 32 slidably abuts the operating groove 3O bi of the operation section 30b.

As shown in FIG. 6, the chucking plate 32 has a chucking slot 32 a through which the rod 21 is pushed through by frictionally engaging with the mouth 21, and the operation of the operation lever 30. As a result, as shown in FIG. 7, the chucking plate 21 is inclined, and the long chucking hole 3 2 a of the chucking plate 21 frictionally engages with the rod 21, and the port 21 is drawn. It is sent forward from the state of 4, and the state shown in Fig. 5 is obtained. An elastic member (spring) 33 is disposed between the fixing portion 80 of the guide body 2 and the chucking plate 32 while passing through the rod 21, and the elastic member 33 is The jacking plate 32 is urged to return to the initial state. When the grip of the operation lever 30 is released, the biasing force returns the chucking plate 32 to the initial state, and the operation lever 30 also moves to return to the initial state. A stopper 34 is provided to prevent the rod 21 from moving backward. The stopper 34 includes a reper 34 a that is cantilevered at the upper portion of the handle 3, and an elastic member (spring) that resiliently supports between the leper 34 a and the chucking plate 32. It is made up of 34 c and passes through rod 21 at through hole 34 a 1 of leper 34 a. As soon as the operating lever 30 is loosened, the chucking plate 32 becomes perpendicular to the rod 21 and slides against the rod 21 so that the chucking plate 32 is locked. Do not move C21 back. The spring force of the elastic member 33 is set to be greater than the spring force of the elastic member 34c, and when the contrast agent injector 50 is attached and the operation lever 30 is pulled as shown in Fig. 4, operation is performed. The lever 30 rotates in the pushing direction about the lever fulcrum ◦1, and pushes the chucking plate 3 2 slidably in contact with the operating groove 30b1 of the operation unit 30b. I do. As a result, the chucking plate 3 2 moves forward while tilting against the restoring force of the elastic member 3 3. The plunger 51 of the contrast agent injector 50 is pressed by being chucked by the chucking slot 3 2a of the plate 32 and moving forward, and the contrast agent is discharged from the discharge port 51 a of the barrel 51. Is done. When the operating lever 30 is released, the operating lever 30 and the chucking plate 32 return to the initial position by the restoring force of the elastic member 33 without any influence on the rod 21.

In this way, the barrel 51 of the contrast agent injector 50 is held by the injection assistant 1, and the operation of the operation hopper 30 is decelerated and transmitted to the pushing means 20 based on the principle of leverage. The plunger 52 of the barrel 51 is pushed by the moving means 20 to inject the contrast agent filled in the barrel 51, so that the injection operation can be performed with the force of the finger operating the operation lever 30. Even if a patient's blood vessel penetrates a patient's blood vessel and is punctured by a syringe needle, or if a patient's blood vessel contracts during injection due to injection of a contrast agent, or if the tube is blocked, the resulting pressure fluctuations Can be sensed with a particularly sharp finger of the hand, and the injection operation can be stopped or slowed down.

Even if the initial volume of the contrast agent filled in this barrel 51 is 40 m1 or more, and even 70 m1 or more, and the volume is large, a control device such as an automatic injection device is not necessary, and it is quite handy. You do not need to press with the force of the finger, you can perform the injection operation with the force of the finger.

In addition, even if the cross-sectional area of the barrel 51 is 3 cm ² or more, and even 7 cm ² or more, and a large pressing force is required, a control device such as an automatic injection device is not required, and the palm can be used with considerable force. There is no need to press, and injection can be performed with the power of a finger.

In this embodiment, as shown in FIG. 1, the distance L 1 from the tip of the barrel 51 to the fulcrum O 1 of the power transmission means 20 is 40 cm or less, especially 25 cm or less. It is preferable that Thus, even if the initial volume of the contrast agent filled in the barrel 51 of the contrast agent injector 50 is large, it is easy to handle and operate the injection capturing aid 1 by hand. . Further, the distance L 1 is preferably 5 cm or more, particularly preferably 10 cm or more. Thus, even if the initial volume of the contrast agent filled in the barrel 51 of the contrast agent injector 50 is large, the attachment / detachment of the contrast agent injector 50 becomes easy.

Further, in this embodiment, the power transmission means 20 is provided around the lever fulcrum O l by the operating part 30 b integral with the operating lever 30 and by the chucking plate 32. Although the rod 21 is advanced to the barrel side, a member such as a separate revolver is provided on the operation lever 30 so as to rotate on the body, and when this member rotates, the pushing means 20 is configured. The chucking plate 32 and the rod 21 may be advanced to the barrel side. As described above, a member that rotates integrally or integrally with the operation lever 30 around the lever fulcrum O 1 is provided, and when this member rotates, the pushing means moves forward to the barrel side, whereby the operation is performed. The operation of the lever ₃₀ can be pushed by the pushing means 20 with a simple structure based on the principle of leverage.

Further, as shown in FIGS. 4 and 5, the distance L2 from the fulcrum O1 of the tiller to the point of application O2 is preferably 0.5 cm or more, particularly preferably 0.7 cm or more. As a result, the pushing distance of the chucking plate 32 can be secured, the operation frequency of the operation lever 30 can be reduced, and the operability is good.

The distance L2 from the fulcrum O1 to the point of application O2 is preferably 3 cm or less, particularly preferably 2 cm or less. As a result, the force required for operating the operation lever 30 based on the principle of leverage is weakened, the injection operation can be performed with the force of a finger, and the pressure fluctuation when an abnormality occurs during the injection of the contrast medium is reduced. You can feel it with your fingers. Also, in all operations from the initial position of the operating lever 30 to the maximum operating position, the direction DP in which the plunger 52 is pushed by the pushing means 20 and the operating lever 40 as the power transmission means 40 The angle 間の between the direction DL connecting the support shaft 35 as the fulcrum O 1 of the 30 and the tip O 2 of the operation part 30 b of the operation lever 30 as the point of action is 30% or more and 150 ° or less, particularly 45 ° or more and 135 ° or less, excluding friction, etc., 50% of the force transmitted by the power transmission means 40 The above is transmitted to the pushing means 20, which is preferable. In the embodiment shown in the figure, the angle 0 is not less than 80 ° and not more than 135 °. In this manner, in all operations from the initial position of the operation lever 30 to the maximum operation position, the operation of the operation lever 130 is transmitted to the pushing means 20 by deceleration and increase. That is, in all operations from the initial position of the operation lever 30 to the maximum operation position, the force required to operate the operation lever 30 is smaller than the force transmitted to the pushing means 20 and It is preferable that the speed at which the operating lever 30 is operated is higher than the speed at which the pushing means 20 moves, so that the operation can be easily and consistently performed with the force of a finger, and pressure fluctuation can be easily sensed. In addition, the material of the rod 21, the chucking plate 32, and the elastic member 33 is made of metal, and the other members are made of structural plastic, from the viewpoint of weight and durability. preferable. In the case of an MRI apparatus, that is, an MRI apparatus that uses a magnetic resonance effect to capture a tomographic image of a subject in real time, the metal member of the injection trapping tool, particularly a large volume rod, For example, a non-magnetic metal such as non-magnetic stainless steel is preferable because the possibility of disturbing the magnetic field is further reduced.

"Modified example"

FIG. 12 is a side view showing a modification of the injection / capture aid according to the first embodiment. The injection aid 1a of this modification is provided with a projection 71 on the receiving portion 70 of the holding means 10a, and when the contrast medium injector 50 is mounted on the holding means 10a, The protrusion 71 engages with the flange 51c of the barrel 51. As a result, after the operating lever 30 is returned to the initial state and the stopper 34 is released, the knob 23 is pulled rearward on the opposite side to the pressing direction, so that the plunger 52 is pressed in the pressing direction. When the barrel 51 is pulled back in the opposite direction, the barrel 51 can be restricted from being pulled back in the direction opposite to the pressing direction. "Embodiment 2"

Next, FIG. 13 shows the vicinity of the power transmitting means 4 Oa of the injection capturing aid 1 b of the second embodiment, which is an example in which the power transmitting means 40 provided in the injection capturing aid 1 of the first embodiment is modified. Show. In this embodiment, a guide member 90 is provided on the operation lever 30 in parallel with the rod 21. The guide member 90 is provided with two pairs of support rollers 91 disposed at two front and rear positions. It is movably supported in the backward direction. Rack teeth 90 a are formed on the guide member 90, and pinion teeth 92 a of a rotating body 92 provided in the injection trapping tool 1 b mesh with the rack teeth 90 a. . The rotating body 92 has a built-in one-way clutch 93 that allows rotation only in the forward direction.The rotating body 92 and the drive shaft 94 rotate in a body, and the pinion teeth 9 of the drive shaft 94 4a is engaged with the rack teeth 2 1d of the rod 21. When the operating lever 30 is pulled, the guide member 90 rotates the rotating body 92 in the forward direction, whereby the rotating body 92 and the drive shaft 94 rotate together in the pushing direction, and the rod 21 is rotated. Moves forward. That is, the pushing means 20 advances to the barrel 51 side. At this time, the operation of the operation lever 130 is performed by changing the speed reduction ratio between the pinion teeth 92 a and the pinion teeth 94 a of the rotating body 92. In accordance with the principle of the roller according to the above, the deceleration is increased and transmitted to the driving means 20. Thereby, the plunger 52 is pushed and the contrast agent filled in the barrel 51 is injected. When the hand for operating the operation lever 30 is released, the operation lever 30 is returned to the original position by the elastic member 95.

In all operations from the initial position of the operation lever 30 to the maximum operation position, the direction DP in which the plunger 52 is pushed by the pushing means 20 and the rotating body that is the power transmission means 20 are used. The central axis O 1, which is the fulcrum of the 94, is engaged with the pinion teeth 94 a of the rotating body 94, which is the point of action, and the rack teeth 21 d provided on the rod 21. The angle 間の between the direction DL connecting O 2 and the angle DL 3 should be 30 ° or more and 150 ° or less, and in particular, 45 ° or more and 135 ° or less, except for friction, etc. Preferably, 50% or more of the force transmitted by the power transmitting means 40a is transmitted to the pushing means 20.

In the embodiment shown in FIG. 13, the angle 0 is 90 °. In this manner, in all operations from the initial position of the operation lever 30 to the maximum operation position, the operation of the operation lever 30 is transmitted to the pushing means 20 by deceleration and increase. That is, in all operations from the initial position of the operation lever 30 to the maximum operation position, the force required to operate the operation lever 30 is smaller than the force transmitted to the pushing means 20 and It is preferable that the speed at which the operation lever 30 is operated is higher than the speed at which the pushing means 20 moves, so that the operation can be easily performed with the force of a finger consistently and the pressure fluctuation can be easily sensed.

In the first and second embodiments described above, one operation of the operation lever 30 does not enable the entire operation from the start of injection of the initial contrast agent filled in the barrel 51 to the end of injection, but a plurality of operations. By operating the operation lever 30 a number of times, the entire operation from the start of the injection of the contrast agent filled in the barrel 51 to the end of the injection can be performed. Thus, the contrast agent can be injected by the operation of grasping the operation lever 30 with the force of a finger. The start of injection refers to the timing at which the initial contrast agent filled in the barrel 51 is sent out from the inside of the barrel 51 for the first time, and the end of injection refers to the pushing of the plunger 52 in the barrel 51. This is the timing at which the pushing means 20 that cannot be moved forward can no longer move forward. In the first and second embodiments, it is preferable that the injection speed of the contrast agent be 5 ml seconds or less on average. Thereby, the operation lever 30 can be easily operated with the finger of the hand, and the contrast agent can be injected while the pressure fluctuation can be felt more easily with the fingertip. The injection speed of the contrast medium is preferably 0.1 m1 second or more on average. Thereby, more appropriate contrast imaging can be performed. Further, the injection pressure of the contrast agent is preferably 1 × 10 ⁶ Pa or less. Thus, the operating lever 30 can be easily operated with the finger without the barrel 51 being ruptured, and the contrast agent can be injected while the pressure fluctuation can be felt more easily with the fingertip. Also, the injection pressure of the contrast agent needs to be higher than the fluid pressure of the injection destination, such as blood pressure or pressure in the ureter. The contrast medium injection device is suitable for use in injecting a contrast medium into the urinary tract or venules.

"Embodiment 3"

The third embodiment is a modified example of the holding means 10 and the pushing means 20 of the contrast agent injector of the first or second embodiment.

FIG. 14 is a side view of the injection assistant in the third embodiment, FIG. 15 is a perspective view of the injection assistant, FIG. 16 is a plan view of the injection assistant, FIG. 18 is a front view of the intermediate plate, FIG. 19 is a perspective view of the intermediate plate, and FIGS. 20A to 20C are perspective views of the contrast agent injector.

The injection auxiliary tool 101 of this embodiment includes a holding means 110, a pushing means 120, an operation lever 130, and a power transmission means 140, and the contrast medium injector 1 Assists the 50 injection operation.

This contrast agent injector 150 includes a barrel 151 and a plunger 152 as shown in FIGS. 20A to 20C. The barrel 15 1 is filled with a predetermined amount of a contrast agent, the discharge port 15 1 a of the barrel 15 1 is closed with a cap 1 ′ 5 1 b, and the cap 15 1 b is removed during use. And connect the injection pipes 15 3.

The barrel 151 is formed of a transparent body such as a transparent resin or transparent glass, and has a flange portion 151c on the opening side. A label 155 having a scale 154 indicating the amount of the contrast agent to be filled is adhered to the barrel 151, so that the amount of the contrast agent can be easily confirmed visually. Plunger 152 removably engages with a biston 1556 having a head 1556a. The head 1 56 a is pushed by the pushing means 1 20, and this push causes the biston 15 6 and the plunger 15 2 to slide on the barrel 15 1 內, and the outlet 1 of the barrel 15 1 Injection is possible from an injection pipe 15 3 connected to 51 a.

In the injection assistant of the present embodiment, the contrast agent injector in the state where the pistons 156 are engaged is exchangeably held, so that the work of replacing the contrast agent injector is good.

This contrast agent injector 150 is for 100ml (Fig. 20A), for 80ml (Fig. 20B, 50ml (Fig. 20C is shown, for example, as shown in Table 2) Although it can be used as a contrast medium, it is particularly preferable to use it as a contrast medium for radiography.

Table 2

The present invention is not limited to this, and may be used for injection of a large amount of a contrast agent.

Further, in this embodiment, a drug solution of a contrast agent is shown as a drug, but it can be used as a large-capacity barium sulfate enema, etc. in addition to the above-mentioned contrast agent.

Barium sulfate enema is injected into the large intestine from the anus and imaged.

Product name Manufacturer

Parienema Ota Pharmaceutical

Parosparsenimaset (Horii) Horii Pharmaceutical

Etc., and is preferably used in the medical field.

The holding means 110 provided on the injection capturing aid 101 includes a receiving part 111 on which the barrel 151 of the contrast agent injector 150 can be placed, and a receiving part 111 The placed palle And a holding portion 112 for holding a part of the rule 151. The receiving part 111 is fixed to the guide 102, and the guide 102 is fixed to the handle 103. The receiving part 111 and the holding part 112 are shown in FIG. As shown in the figure, the transparent resin cylinder is formed in a shape obtained by halving the cylinder in the axial direction, and the holding portion 112 is shorter than the receiving portion 111. One end of the holding portion 1 1 2 can be opened and closed with respect to the receiving portion 1 1 1 with the hinge 1 1 3 as a fulcrum, and the claw 1 1 4 at the other end can be locked with the receiving portion 1 1 1 1 1 1 Engage with 5 and fix.

The barrel 1 5 1 of the contrast agent injector 150 is placed on the receiving section 1 1 1, and a part of the barrel 1 5 1 is held by the holding section 1 1 2, whereby the contrast agent injector 1 5 0 Can be easily attached and detached, and can be easily and reliably held.

In addition, the receiving part 111 and the holding part 112 are transparent bodies, and the scale of the contrast agent injected into the barrel 150 of the contrast medium injector 150 is checked. The amount can be easily confirmed.

The holding portion 1 12 has an engaging groove 1 12 b on the pressing surface 1 12 a side, and an elastic body 1 16 is engaged with the engaging groove 1 1 2 b. . By closing and fixing the holding portion 1 1 2, the elastic body 1 16 presses and holds a part of the barrel 15 1, so that the barrel 15 1 can be reliably pressed and held without damaging the barrel 15 1. . The elastic body 116 uses a flexible resin pipe, but may be made of rubber or the like. Further, in this embodiment, the elastic body 116 is provided at one place, but may be provided at a plurality of places, or may be provided on the entire pressing surface 112a.

In addition, a flange 1 51 c provided on the opening side of the barrel 15 1 abuts on an end 1 1 a of the receiving portion 1 1 1 and an end 1 1 2 c of the holding portion 1 1 2. Thus, the movement of the barrel 151 in the pressing direction can be reliably restricted.

The pushing means 120 provided in the injection capturing aid 101 includes a rod 121, a pressing part 122 attached to a tip part 121a of the rod 121, and a rod 122. And a knob 1 2 3 attached to the head 1 2 1 b of the 1 2 1. The rod 122 is movably provided on the guide body 102, and an intermediate plate 124 is interposed between the pressing part 122 and the head 156a of the piston 156. ing. As shown in FIGS. 18 and 19, the intermediate plate 124 has an engaging sliding portion 124a, an engaging holding portion 124b, and a pressing portion 124c. It is integrally formed of resin, but is not limited to this. The engaging sliding portions 124a are formed on both sides of the pressing portion 124c, and the notch portions 124a1 are formed on the left and right sides of the guide 102, and the rail portions 102a. And is slidably engaged with the holding means and is engaged and held movably in the pushing direction on the holding means side. The engagement holding portion 124b is formed below the pressing portion 124c, and the outer surface 12441 can slide on the guide surface 102b of the guide body 102. The head 1556a of the piston 1556 is engaged with and held by the concave groove 124b2. Thus, by pulling the knob 123 of the mouth 122, the plunger 152 is pulled via the piston 156, and it can be confirmed whether the tip of the injection needle is in the blood vessel.

An opening 102 c is formed in the guide body 102, and a pressing portion 122 of the rod 121, an intermediate plate 124, and an engagement holding portion 1 of the intermediate plate 124 are formed. The head 1 56 a of the piston 1 56 engaged with and held in the 2 4 b does not interfere with the guide body 102.

The pressing force from the pushing means 120 is transmitted to the plunger 152 via the intermediate plate 124 and the piston 156, and even if the pushing means shifts during operation, the intermediate plate 122 4 restricts the transmission to the plunger 15 2 via the piston 15 6, so that the contrast medium can be injected accurately by manual operation.

The intermediate plate 124 is engaged and held movably in the pushing direction on the holding means 110 side, that is, the guide body 102 to which the holding means 110 is fixed. By being engaged with and held by the head part 156a, it is possible to smoothly move in the pushing direction. The operation lever 130 provided in the injection aid 101 has a grip portion 130a and an operation portion 130b, and the operation portion 130b side has a support shaft on the handle 103. 13 5 is provided to be pivotable. Hold the handle 103 with one thumb and the control lever 130 with the other four fingers, and operate with the manual force pulled toward the handle 103.

"Modified example"

FIG. 21 is a side view showing a modification of the injection assistant according to the third embodiment. The injection capturing aid 101a of this modified example has a projection 17 at the receiving portion 170 of the holding means 110a. When the contrast agent injector 150 is attached to the holding means 110a, the protrusion 1711 engages with the collar 1.51c of the barrel 151. . As a result, after the operation lever 130 is returned to the initial state, by pulling the knob 123 to the rear opposite to the pushing direction with the stopper 134 released, the plunger 150 is pulled. When the 2 is pulled in the direction opposite to the pressing direction, it is possible to restrict the barrel 15 1 from being pulled back to the side opposite to the pressing direction.

"Embodiment 4"

This embodiment is a modification of the power transmission means of the first to third embodiments. FIG. 22 is a schematic configuration diagram of the power transmission means 140a of the fourth embodiment, and FIG. 23 is a schematic configuration diagram showing an operation state of the power transmission means 140a of the fourth embodiment.

The power transmission means 140a provided in the injection assistant 101 transmits the manual force to the operation lever 130 to the pushing means 120 by increasing the manual force by the principle of leverage. According to this principle of leverage, as shown in FIGS. 22 and 23, the chucking plate 13 2 is fixed to the operation portion 130 b of the operation lever 130. The chucking plate 13 2 has a through hole 13 2 a through which the rod 12 1 passes, and with the operation of the operation lever 130, the mouth 1 2 1 is brought into the state shown in FIG. From the front, and it will be in the state as shown in Fig. 23.

An elastic member (spring) 133 is disposed between the fixed portion 180 of the guide body 102 and the chucking plate 132 while passing through the rod 122. The elastic member 133 has a restoring force for returning the chucking plate 132 to the initial state.

Also, a stopper 134 is provided to prevent the rod 122 from moving backward. The stopper 13 4 has a lever 13 4 a which is supported at the upper portion of the handle 10 3 and a lever 13 4 a which is fixed to the guide body 10 2 with a fixing portion 13 4 b. And an elastic member 134c that elastically supports between them, and passes through the rod 122 through the through hole 133a1 of the repeller 134a.

This stopper ^ "1 34 has no effect on the forward movement of the rod 12 1 by pulling the operating lever 13 3 toward the handle 10 3, but the rod 12 1 When a force is applied that pushes in the direction of Increase the frictional resistance to prevent the mouth 1 2 1 from sliding backwards.

When the contrast agent injector 150 is attached and the operating lever 13 is pulled as shown in Fig. 22, the chucking plate 13 2 moves forward while tilting against the restoring force of the elastic member 133. At this time, the rod 12 1 is chucked by the chucking plate 13 2 and moves forward, and the plunger 15 1 of the contrast medium injector 15 As a result of being pressed through the plate 124, the chemical solution is discharged from the outlet port 151a of the nozzle 1515.

When the operating lever 13 is released, the operating lever 13 and the chucking plate 13 return to the initial position by the restoring force of the elastic member 13 without any influence on the rod 12. Will do.

As described above, in the injection auxiliary tool 101 of this embodiment, the barrel 15 1 of the contrast agent injector 150 is mounted and held on the holding means 110, and the operation lever 130 is manually operated. When this is operated, this manual force is transmitted to the pushing means 120 by the power transmission means 140, and the pushing means 120 pushes the plunger 15 2 of the contrast agent injector 150 to the intermediate plate 1 24, By pushing through the pistons 156, the drug solution of the contrast agent injector 150 can be injected, and even when a high-viscosity contrast agent is injected at high pressure, manual operation is required. Injection can be performed quickly and easily, and for example, it is possible to know whether or not the injection needle is correctly inserted into the blood vessel of the patient, the injection speed, and the like with the sense of a finger of the hand.

By increasing the manual force applied to the operating lever 130 by the principle of leverage and transmitting it to the pushing means 120, injection can be performed more quickly and easily by manual operation.

Industrial applicability

As described above, in the injection assistant of the present invention, the barrel of the contrast agent injector is held by the injection assistant, and the operation of the operation lever is transmitted to the pushing means by deceleration by the principle of leverage. By pushing the barrel plunger by means and injecting the contrast agent filled in the barrel, the injection operation can be performed with the force of a finger, and when the injection needle is pierced through the patient's blood vessel, Even if the patient's blood vessel contracts during the injection or the tube becomes blocked due to the injection of the contrast agent, the pressure fluctuation caused by the In particular, it can be felt with a sharp finger and the injection operation can be stopped or slowed down. Therefore, it is suitable for injecting a contrast agent.

Claims

The scope of the claims

1. An injection aid for detachably holding a contrast agent injector capable of injecting a contrast agent filled in a barrel by pushing a plunger, and assisting an injection operation of the held contrast agent injector. ,

Holding means for holding the barrel,

Pushing means for pushing the plunger,

An operation lever operable by a finger of a hand,

And a power transmission means for transmitting the operation of the operation lever to the pushing means by deceleration based on the principle of leverage.

2. The injection and capture device according to claim 1, wherein the initial volume of the contrast agent filled in the barrel is 40 m1 or more.

3. The injection and capture device according to claim 1, wherein the initial volume of the contrast agent filled in the barrel is 250 ml or less.

4. Injection aid according to any one of Claims paragraphs 1 through the third term, wherein the cross-sectional area of the barrel is 3 cm ² or more.

5. The injection trap according to any one of claims 1 to 4, wherein a sectional area of the barrel is 20 cm ² or less.

6. The injection according to any one of claims 1 to 5, wherein a distance from a tip of the barrel to a fulcrum of a ram of the power transmission means is 4 Ocm or less. Aids.

7. The injection according to any one of claims 1 to 6, wherein a distance from a tip of the barrel to a fulcrum of a power transmission means is 5 cm or more. An aid.

8. The power transmission means is:

A rotating member that rotates around a fulcrum of a pivot by operating the operating lever, and when the rotating member rotates in a pushing direction, the pushing means advances to the barrel side. The injection / capture aid according to any one of claims 1 to 7, wherein the injection / capture aid is provided.

9. The injection assisting tool according to claim 8, wherein the pushing means advances directly or indirectly to the barrel side by an action from an action point of the rotating member. .

10. The injection aid according to claim 9, wherein the distance from the fulcrum of the roller to the point of application is 0.5 cm or more.

11. The injection / capture aid according to claim 9 or 10, wherein a distance from a fulcrum of the roller to the point of application is 3 cm or less.

1 2. In all operations from the initial position of the operation lever to the maximum operation position, the direction in which the plunger is pushed by the pushing means, the fulcrum of the pivot of the power transmission means, and The injection trap according to any one of claims 9 to 11, wherein an angle between the direction and a direction connecting the action point is not less than 30 ° and not more than 150 °. Aids.

13. In all the operations from the initial position of the operation lever to the maximum operation position, the operation of the operation lever is transmitted to the pushing means by decelerating force. The injection aid according to any one of claims 1 to 12, wherein:

144. One operation of the operation lever cannot perform all operations from the start to the end of injection of the original contrast agent filled in the barrel. The injection trap according to any one of claims 1 to 13, wherein the injection trap is capable of performing everything from the start of injection of the filled contrast agent to the end of injection.

15. The injection aid according to any one of claims 1 to 14, wherein the barrel is visible while the barrel is held by the holding means.

16. The injection trap according to any one of claims 1 to 15, wherein the contrast medium is injected at an injection speed of 5 m1 second or less on average. Aids.

17. The method according to any one of claims 1 to ^16, wherein the contrast agent is for injecting at an injection pressure of 1 X 106 Pa or less. Injection assistance Utensils. one

18. The injection and capture device according to any one of claims 1 to 17, wherein the contrast agent is for injecting the contrast agent into the urinary tract or venules.

19. The injection trap according to any one of claims 1 to 18, wherein a handle is provided at a position where the handle can be grasped by a human hand together with the operation lever. Aids.

20. The injection aid according to claim 19, wherein the auxiliary device can be lifted and operated by grasping the operation lever and the handle.

21. The injection aid according to claim 19 or 20, wherein the handle and the holding means are of an integral type.

22. The holding means includes: a receiving portion on which the barrel of the contrast agent injector can be placed; and a holding portion for holding a part of the barrel placed on the receiving portion when the barrel is openably and closably closed. 2. The injection aid according to claim 1, wherein the injection aid has a portion.

23. The injection / capture aid according to claim 22, wherein the holding section is a transparent body.

24. The injection assistant according to claim 22 or 23, wherein the holding portion has an elastic body that presses and holds a part of the barrel.

25. The barrel of the contrast agent injector, wherein the barrel has a flange on the opening side of the barrel, and the flange is brought into contact with the holding portion. Injection / capture aid according to any one of Items 4 to 4.

26. The receiving portion according to any one of claims 22 to 25, wherein the receiving portion has a projection, and the flange is engaged with the projection. Injection catcher.

27. In the contrast agent injector, a plunger having a head having a head is engaged, and an intermediate plate is interposed between a pressing portion of the pressing means and the head of the biston. The injection aid according to any one of claims 22 to 24, characterized in that:

28. The intermediate plate has an engagement sliding portion which is engaged and held movably in the pushing direction on the holding means side, and an engagement holding portion which engages and holds the head of the biston. 28. The injection / capture aid according to claim 27, characterized by the above-mentioned.

29. The contrast agent injector according to any one of claims 1 to 28, wherein the barrel of the contrast agent injector is a transparent body and has a scale indicating the amount of the contrast agent to be filled. Injection / capture aid according to 1.

30. The injection / capture aid according to any one of claims 1 to 29, wherein the contrast agent includes a barium sulfate enema.