JPH0515591A - Appliance for self-control of injection of medical fluid and device using the same - Google Patents

Abstract

PURPOSE:To provide a medical fluid self-control appliance capable of arbitrarily selecting an administration dose, capable of being prepared in low cost and not generating trouble such as leakage. CONSTITUTION:The center part of a grasping rotary arm 3 having rollers 5 attached to both ends thereof is mounted on a support fixed stand 1 in a freely rotatable manner by a shaft and a silicone tube 6 filled with a medical fluid is arranged along the revolving locus of the arm 5 in a semicircular arc form and an inlet part 7 and an outlet port 8 are formed to both ends of the silicone tube 6. When the grasping rotary arm 3 is revolved, the silicone tube 6 is squeezed by the rollers 5 to squeeze out the medical fluid in the tube 6. The squeezed-out amount of the medical fluid can be steplessly or stepwise changed by the angle of revolution of the grasping rotary arm 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for self-controlling chemical injection and a device using the same. More specifically, the present invention relates to a device for self-control of drug solution injection, which is used together with an analgesic agent, an anti-cancer agent, etc., in a system for continuous microinjection to relieve postoperative pain and cancer pain, and a device using the same.

[0002]

2. Description of the Related Art In recent years, in the field of anesthesia, drug administration by epidural catheter insertion method using a small amount of continuous infusion device has been performed for pain management such as postoperative pain and cancer pain.
By the way, the patient has various symptoms, and the patient sometimes complains of sudden pain even during the continuous microinjection of the analgesic. In order to deal with such an emergency, a device that allows a patient to administer an analgesic in one shot by himself is under development, and as an example of such a device, as disclosed in Tokuhyo Sho 63-501195.
There is a drug solution self-control tool described in Japanese Patent Laid-Open Publication No.

As shown in FIG. 3A, this self-control tool comprises a plateau 98 of a back plate 86 and a chamber 90 defined by a circular flexible sheet 96.
A conduit communicating with the drug solution container and a conduit communicating with the catheter or the like are connected to 90. A floating plate 100 is placed on the flexible sheet 96, and a push button 84 for the patient to push by himself is arranged above the floating plate 100. The base of the push button 84 is supported by a pin 116, and a coil spring 124 is attached to the pin 116. Then, when the patient pushes the push button 84 as shown in FIGS. 9B and 9C, the chamber 90 is compressed and the liquid medicine is administered to the human body through the conduit. When the push button 84 is released, the push button 84 returns to its original state by the coil spring 124, as shown in FIG.

[0004]

However, in the above conventional example, the flexible sheet 96 does not return to its original state by itself even if the patient releases the push button 84 as shown in FIG. 3 (d). The chamber 90 is refilled with the chemical liquid only by the force of pushing the chemical liquid from the chemical liquid container. However, since the drug solution container was originally intended to administer a very small amount of drug solution, its discharge volume was small and refilling could not be performed without taking a long time (Tokusho Sho 63-501195).
See page 6, lower right column, lines 13 to 19). In addition to this, the above-mentioned conventional example has a drawback in that it is not possible to inject the amount of drug solution required by the patient because the dose is small and limited. Further, as is apparent from FIG. 3, the above-mentioned conventional example has a fundamental defect that the structure is very complicated and the manufacturing cost is high, and in particular, leakage easily occurs around the flexible sheet 96.

In view of such circumstances, it is an object of the present invention to provide a chemical liquid injection self-control tool which allows the dose to be arbitrarily selected, can be manufactured at a low price, and is free from trouble such as leakage. And Moreover, it aims at providing the apparatus for self-injecting the chemical | medical solution using the control tool.

[0006]

SUMMARY OF THE INVENTION An instrument for self-controlling chemical injection according to the present invention comprises a gripping rotary arm having rollers at both ends, and a central portion of a gripping rotary arm rotatably attached to a supporting / fixing base. A silicone tube filled with a chemical solution is arranged in a semicircular shape along the swirl locus, and an inlet port and an outlet port are formed at both ends of the silicone tube.

The drug solution self-control device according to the present invention can also connect an upstream side infusion tube and a downstream side infusion tube to its inlet port and outlet port, respectively. A device for self-injecting a drug solution according to the present invention is characterized in that the device according to claim 2 is connected in parallel to an injection line of a drug solution micro continuous injection device.

[0008]

In the drug solution self-control device of the present invention, when the patient holds the rotating gripping arm by hand and swivels it, the rollers at both ends of the rotating gripping arm squeeze the silicone tube, so that the liquid medicine inside the silicone tube is pushed out. Since the amount of the drug solution pushed out varies depending on the angle at which the gripping rotation arm is swung, the drug solution dose can be changed steplessly or stepwise by adjusting the turning amount. Further, in the drug solution self-control tool of the present invention, the main components are composed of three points of the supporting and fixing base, the silicone tube, and the gripping rotating arm, so that it is very simple and the manufacturing cost is low, and the drug solution is filled. Since there is no sliding part in the part that does not occur, failure such as leak does not occur.

[0009]

EXAMPLES Next, examples of the present invention will be described. In FIG. 1, reference numeral 1 denotes a supporting and fixing base, which is about the size of a men's wristwatch and has a wearing belt 2 for attaching it around a wrist. Support fixing base 1
A central portion of the gripping rotary arm 3 is rotatably attached by a pin 4 at substantially the center thereof, and rollers 5 are rotatably attached to both ends of the gripping rotary arm 4. The silicone tube 6 is moved along the turning trajectory of the grip rotation arm 3.
Are arranged in a semi-circular shape, and the silicone tube 6
An inlet port 7 and an outlet port 8 are attached to both ends of the. The silicone tube 6 serves as a chamber filled with a chemical solution, and usually has an inner diameter of 1 to 5 mm and a length of 20 to 70 mm so as to have a volume of 0.5 to 5.0 ml. In the above configuration, when the patient holds the gripping rotation arm 3 and swivels it in the direction of arrow a, the roller 5 squeezes the silicone tube 6, so that the drug solution in the silicone tube 6 is pushed out from the outlet port 8.

In the above-mentioned chemical liquid self-injection control tool A,
Since the discharge amount of the drug solution changes depending on the turning angle of the gripping rotation arm 3, the drug solution self-injection control tool A of the present embodiment can adjust the drug solution dose steplessly. Further, if a detent mechanism for temporarily stopping the turning angle of the gripping rotation arm 3 at a predetermined position is provided at several places, the dose can be adjusted in several stages. As such a detent mechanism, any mechanism such as protrusions provided at equal intervals in the circumferential direction between the arm 3 and the support fixing base 1 may be used. In addition, the support fixing base 1
It is preferable to display a scale (for example, 1, 2, 3 ml or the like) indicating the dose of the chemical solution corresponding to the turning angle of the arm 3 on the outer periphery of the.

An upstream side infusion tube 11 may be connected to the inlet port 7 of the drug solution self-injection control tool A, and a downstream side infusion tube 12 may be connected to the outlet port 8.
According to this device, since it is easy to connect to other injection lines by means of the import liquid tubes 11 and 12, it is possible to connect the other device to the other liquid injection device with the drug self-injection control tool A attached to the patient's arm. It has the advantage that it can be easily connected.

Next, a device C for self-controlling the chemical liquid injection using the above device will be described.

FIG. 2 shows a device C combined with a chemical liquid micro continuous injection device B. The micro continuous infusion device B is
It is composed of a drug solution container 20 with a drug solution injection pump, an infusion tube 21, a flow rate control means 22 interposed in the infusion tube 21, and a connector 23 connected to the tip of the infusion tube 21. For example, a catheter or the like is connected to the connector 23, and the flow rate of the drug solution extruded from the drug solution container 20 is controlled by the flow rate control means 22 to continuously inject a minute amount of 1 ml / hr, for example.

The liquid medicine self-injection control tool A is connected in parallel with the liquid infusion tubes 11 and 12 to the infusion line constituted by the infusion tube 21. Reference numeral 24 is a flow rate control means interposed in the liquid transfusing tube 11, and limits the flow rate to the drug solution self-injection control tool A to 3 ml / hr, for example. The flow rate control means 22 and 24 may be used by controlling the flow rate within the range of 0.3 to 5.0 ml / hr depending on the symptoms of the patient and the concentration (dilution ratio) of the drug solution.

In this device C, the drug solution flowing out of the drug solution container 20 branches into the infusion tubes 21 and 11, and the drug solution controlled by the flow rate control means 22 is directly injected into the patient. On the other hand, the chemical liquid controlled by the flow rate control means 24 is filled in the chemical liquid injection self-control tool A. Normally, the drug solution does not pass through the drug solution self-control tool A unless the gripping rotation arm 3 is rotated, so that 1 ml / hr of the drug solution is always injected into the patient. When the patient feels sudden pain in such a state of continuous infusion of the drug solution, the patient may turn the gripping rotation arm 3 of the reservoir A by himself. By doing so, the drug solution in the reservoir A can be injected in one shot at a time, so that the patient's pain can be alleviated at any time.

[0016]

INDUSTRIAL APPLICABILITY The drug solution self-control device of the present invention is suitable for patient pain management because the drug solution dose can be arbitrarily set. It can also be manufactured at a low price,
Problems such as leaks do not occur. According to the device of the present invention,
Since the drug solution can be administered in an arbitrary amount, it is suitable for one-shot administration of the drug solution also in combination with the drug solution micro continuous injection device.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a main part of a chemical liquid injection self-control tool according to an embodiment of the present invention.

FIG. 2 is a circuit diagram of a device C for self-controlling chemical injection according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a configuration of a conventional chemical liquid injection self-control tool.

[Explanation of symbols]

A chemical injection self-control tool 1 Support fixed base 3 Grip rotating arm 5 Roller 6 Silicone tube 7 entrance ports 8 exit ports 11 Infusion tube 12 infusion tube 20 Chemical container 21 infusion tube 22 Flow control means 24 Flow control means

Claims (3)

[Claims] 1. A center of a gripping rotary arm having rollers at both ends is rotatably attached to a supporting and fixing base, and a silicone tube filled with a chemical solution is arranged in a semicircular arc along the trajectory of the roller. A device for self-control of chemical liquid injection, characterized in that an inlet port and an outlet port are formed at both ends of the silicone tube. 2. An instrument for self-control of chemical injection, characterized in that an upstream infusion tube and a downstream infusion tube are connected to the inlet port and the outlet port of the instrument according to claim 1, respectively. 3. A device for self-control of chemical liquid injection, characterized in that the device according to claim 2 is connected in parallel to an injection line of a chemical liquid micro continuous injection device.