JPS62139667A - Radioactive liquid medicine distribution apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus for dispensing a medical radiochemical solution from a container to a syringe.

(Prior Art) In recent years, radiological diagnosis in which a radioisotope (RI) is administered into a patient's body and used as a tracer for diagnosis has been actively performed. In this case, since radioactivity is emitted from the chemical solution itself, there is an extremely high risk that the operator will be exposed to radiation during handling.

FIG. 5 shows a conventional method for dispensing this type of chemical solution. In Fig. 5, 1 is a container (vial bottle) containing a radioactive drug solution (hereinafter referred to as IR), 2 is a shield (vial shield) consisting of a button etc. to prevent radioactivity from being released, and 3 is a container containing the required amount of radioactivity. A syringe for dispensing IR, 4 a shield made of lead or the like that is placed over the cylinder part of the syringe 3 to prevent radioactivity from coming out; 5
is a lead glass that allows the scale of the syringe inside to be seen.

The operator holds the syringe 3 equipped with the shield 4 in his hand, sticks the needle into the mouth of the container 1, pulls the piston 3a to dispense the required amount of IR, then pulls out the needle and directly injects it into the patient. Do this work.

(Problem to be solved by the invention) However, in the above conventional dispensing method.

Although shields 2 and 4 are installed, they are not perfect, so there is radioactivity leakage, and since they are manually operated, 1
It was inevitable that the operator would be exposed to radiation during the dispensing process.

The present invention provides a radiopharmaceutical liquid dispensing device that automatically performs dispensing operations and minimizes radiation exposure to the operator.

(Means for solving the problem) In order to achieve the above object, a two-stage elevating mechanism is provided. First, the syringe is raised by the elevating mechanism of the first stage, and the syringe needle is inserted into the mouth of the container set at the top. Once inserted, the piston of the syringe is lowered by the second-stage lifting mechanism to extract the required amount of IR, and in this state, the syringe is lowered by the first-stage lifting mechanism to remove the syringe needle from the mouth of the container. The configuration is such that it is removed.

(Function) By performing the above operations according to a preset program, the required amount of IR can be automatically dispensed, and the chances of the operator being exposed to radiation can be minimized.

(Example) Embodiments will be described in detail below with reference to the drawings.

1 to 4 show an embodiment of the present invention. First, in FIG. 1 showing the front and top surfaces of the device, 11 is a housing, 12 is a container holder that holds an IR container (vial bottle and vial shield) 13 upside down, and 14 is a container holder with a needle 15 facing upward. 17 is a shield made of lead that covers the cylinder portion of the syringe 16, and 18 is a button glass provided so that the scale of the syringe can be seen.

19 is a piston end holding portion that holds the end of the piston 20 of the syringe. The back surface of the shield 17 attached to the syringe is covered with an iron plate, and a magnet is embedded in the part of the syringe holding part 14 facing this, so that the syringe can be easily attached and detached. 30 is a pulse motor.

Next, in FIG. 2 showing the back surface of the device and the internal structure of the container holding part 12, 21 is a rack fixed to the housing 11, and has a groove in the center as described later. 22
23 is a grooved rail fixed to the syringe holder 14 panel, and 24 is a grooved rail fixed to the syringe holder 14 panel. 25a to 25d are rotatable wheels provided on the panel of the syringe holder 14, and are engaged with the grooves of the rack 21 or the rails 22. Reference numerals 26a to 26d are rotatable wheels provided on the panel of the screw end holding portion 19, and are engaged with the grooves of the rack 23 or the grooves of the rail 24. 27 and 28 are pulse motors, and 29 is a limit switch.

The rack 21, rail 22, wheels 25a to 25d, and pulse motor 27 constitute an elevating mechanism (first elevating mechanism) for the syringe holder 14, the main parts of which are shown enlarged in FIG. It is. That is, the four rotatable wheels 25a to 25d provided on the panel of the syringe holder 14 engage with the groove 31a of the rack 21 and the groove 31b of the rail 22, while the wheels 25a to 25d, which are fixed to the panel of the syringe holder 14, engage with the groove 31a of the rack 21 and the groove 31b of the rail 22. Since a pinion 32 connected to the pulse motor 27 via a built-in speed reducer meshes with the teeth of the rack 21, the rotation of the pulse motor 27 causes the syringe holder 14 to move up and down. Similarly, rack 23, rail 24 . Car 26a~
26d and the pulse motor 28 constitute an elevating mechanism (second elevating mechanism) for the piston end holder 19 relative to the syringe holder 14. The elevating mechanism having the above-mentioned structure is characterized in that it moves smoothly and generates extremely little noise compared to a mechanism using a worm gear or the like.

Furthermore, in FIG. 2, 35 is a container holding plate, 36 is a moving plate, 37 is a needle position detection sensor unit, and 38.39 is a pulse motor fixed to the top plate 40 of the casing for moving the moving plate 36. be.

The needle 15 attached to the syringe does not always align with the axis of the syringe. Therefore, if the needle tip is attached with a deviation from the axis, even if the syringe is raised as it is, it will shift from the mouth of the container 135.Therefore, it is necessary to detect the position of the needle tip and move the container to match it. There is.

FIG. 4 shows the moving mechanism. Housing top plate 4
0 is rotatably provided with arms 41a, 41b, and 41c, whose rotation axes are connected to pulse motors 3g and 39 shown in FIG. 2, and pulse motor 30 shown in FIG. 1, respectively. The arms 41a, 41b, and 41c each have a rotatable axle 42a+42bv
42c, and this axle has a long hole 43a formed in the moving plate 36.

43b and 43c (see FIG. 1). Moving board 3
6 is rollers 44 a + 44 b arranged on the top plate 40
The limit switches 45a, 44c are biased in the direction of arrow P by a spring (not shown), etc.
The initial position is set by 45b and 45c. When aligning the tip of the injection needle 15 with the opening of the container, the pulse motor 30 is driven to rotate the arm 41c to move the moving plate 36 by a predetermined amount in the X direction, and then the pulse motors 3g and 39 are rotated. By driving, the arms 41a and 41b are rotated to move the moving plate 36 a predetermined amount in the Y direction.

Next, the operation of this embodiment will be explained. First, the container 13 containing the IR is placed upside down on the holding plate 35, and then the syringe holding part L4 in which the syringe is set is raised by the first elevating mechanism. When the needle tip reaches the upper chain line A shown in the needle position detection sensor section 37 in FIG. 2, the syringe holding section 14 temporarily stops. Therefore, the needle position is detected by the sensor disposed at the level of the lower chain line B shown in the needle position detection sensor section 37, and the pulse motor 30, 38, 39
is activated, and the position of the moving plate 36 can be adjusted. After the needle position coincides with the position of the opening of the container, the syringe holder 14 is raised again by the first elevating mechanism, and the needle is inserted into the opening of the container. Then, the second elevating mechanism is activated, and the piston end holder 19 that holds the end of the piston of the syringe is lowered to dispense the required amount of IR into the syringe.

In this state, the first elevating mechanism operates and the syringe holding part 1
4 is lowered and the needle is removed from the mouth of the container. The above operation is
This is executed under the control of a pre-programmed control unit (not shown). After that, the syringe 16 with the shield 17 attached
The operator may remove the syringe from the syringe holder 14 and inject it into the patient.

In this embodiment configured as described above, the I
Since R is dispensed into the syringe automatically, the chances of the operator being exposed to radiation are greatly reduced.

(Effects of the Invention) As explained above, according to the present invention, by employing a two-stage elevating mechanism, IR dispensing can be performed automatically and with high precision, thereby exposing the operator to radioactivity. It has the advantage of being able to minimize the

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the front and top surfaces of an embodiment of the present invention, FIG. 2 is a view showing the back surface and the internal structure of the container holder, and FIG. 3 is a perspective view showing the elevating mechanism. , FIG. 4 is a diagram showing the x-y moving mechanism of the container holding section, and FIG. 5 is a diagram showing the conventional dispensing method. 12... Container holding part, 13... Container, 14... Syringe holding part, 15... Needle, 16... Syringe, 19...
... Piston end holding part, 21.23 ... Rack, 22.23-... Rail, 25a to 25d, 2
6a-26d-car, 27.28--pulse motor, 3
1a, 31b - groove. Patent applicant Daishin Electric Industry Co., Ltd. Anzai Sogyo Co., Ltd. Figure 1 19. - Figure 3: 31a, 31b ---1 to Figure 4! 4a-44c, Colo Fig. 5

Claims (1)

[Claims] a container holding means for holding a container containing a medical radiopharmaceutical solution in an inverted state; a syringe holding means for holding a syringe with a needle facing upward; a syringe holding means arranged vertically movably below the container holding means; a first elevating mechanism that moves the syringe holding means up and down; a piston end holding means that is provided on the syringe holding means so as to be movable up and down and holds the piston end of the syringe; and a first lifting mechanism that moves the piston end holding means up and down. and a second elevating mechanism, wherein the first elevating mechanism raises the syringe holding means to insert the syringe needle into the mouth of the container, and the second elevating mechanism lowers the piston end holding means. A radiation drug solution dispenser characterized in that a required amount of drug solution is dispensed into a syringe, and in this state, the syringe holding means is lowered by the first elevating mechanism to remove the syringe needle from the mouth of the container. Note device.