JPS6211465A - Liquid drug lasting injector with balloon for blood vessel - 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 (A) Industrial Application Field The present invention relates to a medical fluid continuation device with a blood vessel balloon, which is used for injecting a medical fluid into a balloon and injecting a predetermined amount of the chemical fluid into a blood vessel within a predetermined time. It concerns a syringe.

(B) Prior Art Conventionally, as a method for injecting a drug solution into a blood vessel for a relatively long period of time, a syringe filled with a drug solution is connected to a needle or catheter, and the syringe is operated manually, by a spring, or electrically to cause the drug solution to flow out. Alternatively, the drug solution was placed in an intravenous drip bottle or container, and the drug solution was drained out by natural dripping or electrically operated.

When a drug solution is injected into a blood vessel over a period of several minutes to several hours, the injection 4 or drip bottle serving as the drug solution source must be connected to the injection needle or catheter for that length of time, which is a time-consuming process for both the patient and the practitioner. It was causing inconvenience.

For example, in the case of continuous manual injection, the patient and practitioner are restrained and fixed for a certain period of time, which causes great pain both physically and mentally.

In reality, the limit is said to be 1 to 2 minutes.

Even if electric power or springs are used, it is necessary to secure a power source and install a syringe, which limits the patient's movements.

In the case of continuous infusion of a drug solution through an intravenous drip, a large amount of replacement fluid is required compared to the drug solution, and even patients who do not require fluid replacement end up receiving unnecessary fluid. The IV pin or container must be placed higher than the patient, and a complicated and long tube is required to connect the needle or catheter to the IV pin, which restricts the patient's movement and makes it difficult to perform the procedure. It was also necessary for the personnel to conduct appropriate inspections.

e→Problems to be Solved by the Invention The problems to be solved by the present invention are that the structure is simple, easy to handle, and safe when injecting a medicinal solution into a blood vessel for a relatively long period of time. The purpose of the present invention is to obtain a continuous injector for vascular medicinal fluid with high quality.

B) Means for Solving the Problems The continuous drug solution injector with a balloon for blood vessels of the present invention includes a tubular body (1) having a drug solution flow path (l) formed along the longitudinal axis, A reverse valve (12
1), a drug solution injector (12+) having a flow control valve (131) at the other end of the tubular body; An inflow hole (141) is formed on the liquid injection part side and an outflow hole (142) is formed on the liquid injection part side in the vicinity of the blocking member circle, penetrating the tube wall of the tubular body. Then, the inflow hole and the outflow hole are surrounded by a balloon 12+ made of an elastic material, the peripheral edge of the balloon υ is airtightly fixed to the outer periphery of the tubular body, and a vascular catheter is connected to the drug solution injection part. This solves the above problems.

(E) Embodiment The basic structure of the continuous drug injector of the present invention will be explained with reference to FIGS. 1 to 6. The continuous drug infusion device of the present invention is made up of a tubular body 1, a balloon 2, and an intravascular indwelling device 6.

The tubular body 1 has a medicine rL flow path 11 formed along its longitudinal axis. A drug solution inlet 12 is provided at one end (the right end in the illustrated example) of the tubular body 1, and a drug solution outlet portion 13 is provided at the other end (the left end in the illustrated example). Although the drug solution injection part 12 and the drug solution extraction part 16 may be formed integrally with the tubular body 1, it is preferable to connect separate parts as shown in the illustrated row in consideration of convenience in manufacturing and handling.

A conventional check valve 121 is provided in the chemical liquid injection part 12. The check valve 121 may have a function of allowing the injection of the chemical solution in the direction of the arrow 122, but not allowing the liquid to be injected in the opposite direction.

A conventional flow rate regulator 131 is provided in the drug solution pouring section 16.

The flow rate control valve 161 may be one that allows the practitioner to easily adjust the flow rate using a control knob 162.

In the middle of the tubular body 1, there is a member 14 for blocking the chemical liquid flow path.
is provided. The blocking member 14 may be pre-molded integrally with the tubular body 1, or a separate part may be attached later to the drug Ha channel 11.
may be packed in.

An inflow hole 141 is provided near the blocking member 14 on the side of the liquid medicine injection part 12 (in the illustrated example, on the right side), and an inflow hole 141 is formed on the side of the liquid medicine spouting part 16 (on the right side in the illustrated example).
In the illustrated example, the outflow hole 142 is provided on the left side of the tubular body 1.
It is formed by penetrating the pipe wall.

Therefore, the inflow hole 141 and the outflow hole 142 communicate with the chemical fluid channel 11. Although the inflow hole 141 and the outflow hole 142 are each provided at one location in the illustrated example, they may be provided at multiple locations along the outer periphery of the tubular body 1 or along the longitudinal direction, if necessary.

The balloon 2 surrounds the inflow hole 141 and the outflow hole 142, and the peripheral edge 21 of the balloon 2 is fixed to the outer periphery of the tubular body 1 in an airtight manner. The balloon 2 is preferably made of a wear-resistant, high-toughness material that is highly stretchable and is not easily damaged by external forces. In particular, transparent or translucent materials are preferred. As such a material, for example, commercially available silicone rubber or latex rubber is most suitable.

As shown in FIG. 1, the balloon 2 is in close contact with the outer periphery of the tubular body 1 in the normal state before injecting the drug solution, and when in operation after the drug solution is injected, the balloon 2 is in close contact with the outer periphery as shown in FIG. 3. @21. 'f: The remaining portion expands away from the outer periphery of the tubular body 1.

A commonly used indwelling device 6 in a curved tube is connected to the drug solution extraction part 16. The curved tube indwelling device 3 is placed in the blood vessel up to a predetermined length from the distal end. A large number of indwelling instruments 3 in a curved canal are prepared in various shapes and sizes depending on the place of use (see FIG. 5), and a desired one is selected as necessary.

As another modification of the present invention, the side of the drug solution spouting part 16 of the tubular main body 1? It may be further extended to form an indwelling device in a curved pipe, and a conventional pinch cock may be attached in place of the flow control valve 161.

Although the balloon 2 is basically spherical, it can be formed into any shape to match the shape of the part of the human body in which it is used. For example, as shown in FIG. 4, it may be in the shape of a flat ellipsoid.

A transparent cover (not shown) covering the outside of the balloon may be removably attached to the tubular body 1 to prevent the balloon from bursting if it comes into contact with an external sharp object.

(F) Effect A predetermined amount of the active drug is injected from the drug solution injector 12 of the continuous drug injector. The medicinal solution is in the tubular body 1, medicinal solution #, channel 11, inflow hole 1.
The liquid flows into the balloon 2 through 41 and fills the balloon 2 while inflating the balloon 2.

The medical solution filled in the balloon 2 flows out into the medical solution channel 11 through the outflow hole 142 due to the contraction force of the balloon 2. Therefore, during filling of the medical solution, the end of the indwelling device 3 in a curved tube should be closed by hand. Squeeze the flow rate control valve 131 to the maximum and close the chemical liquid spouting section 13.
It is preferable to close the . The medical solution filled in the balloon 2 is prevented from flowing backward by the check valve 121.

Due to the contraction force of the balloon itself, the medicinal solution filled in the balloon 2 is transferred to the outflow hole 142, the medicinal solution flow path 11°, and the medicinal solution spouting part 1.
3 and enters the vascular catheter 3.

After the balloon 2 is filled with a predetermined amount of the chemical solution, normal air bleed is performed. Preferably, all elements are transparent or translucent to confirm air release.

A portion of a predetermined length from the tip of the vascular catheter 3 is placed in the blood vessel, and the drug solution is injected into the blood vessel from a continuous drug injector.

The injection time of the medical solution is basically determined by the injection amount and viscosity of the medical solution, the contraction characteristics of the balloon 2, and the cross-sectional area of the outflow hole 142. In reality, it is sufficient to actually measure the dispensing time using a standard drug solution for each drug solution continuous injector.

The ejection resistance of the medicinal solution is determined not only by the cross-sectional area of the outflow hole 142 but also by the throttling rate of the flow control valve 161, the line resistance of the connected vascular catheter B, and the blood resistance in contact with the outflow port. Therefore, in actual use, the pouring time should be determined by comprehensively taking these matters into account.

Furthermore, the outflow hole 142 is used as a means for adjusting the outflow resistance.
It is also effective to attach a permeable membrane to the outlet hole 142, or attach a thin metal plate with pores to the outflow hole 142.

(g) Effects The continuous drug infusion device of the present invention functions as a container for a drug solution and as a device for injecting a drug solution, so it has a simple structure and is easy to handle. Therefore, the patient's actions and body movements are not restricted, and the practitioner's labor and restraint time are reduced. Furthermore, once the air is removed, air will not enter the balloon until it is completely deflated.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a continuous drug injector of the present invention. Figure 2 is a cross-sectional view taken along the line ■-■ in Figure 1. FIG. 6 is a drawing similar to FIG. 1 and shows the balloon in an inflated state. FIG. 4 is a plan view showing an example of another shape of the balloon. FIG. 5 is a plan view showing various shapes of the indwelling device in a curved canal. 1: Tubular body 11: Medical solution flow path 12: Medical solution injection part 16: Medical solution extraction part 14: Blocking member 141: Injection hole 142: Output hole 131: Flow rate control valve 2: Balloon 21: Periphery 6: Intravascular indwelling device

Claims (1)

[Claims] A tubular body (1) having a medicinal liquid flow path (11) formed along the longitudinal axis is provided, a medicinal liquid injection part (12) having a check valve (121) is provided at one end of the tubular body; A liquid medicine spouting part (13) having a flow rate control valve (131) is provided at the other end of the tubular body, a member (14) for blocking the liquid medicine flow path is provided in the middle of the tubular body, and the blocking member (14) An inflow hole (141) and an outflow hole (142) are formed near the drug solution inlet side and the drug solution spout side, respectively, penetrating the tube wall of the tubular body, and a balloon (2) made of an elastic material is formed. ) surrounding the inflow hole and outflow hole, the periphery (21) of the balloon is airtightly fixed to the outer periphery of the tubular body, and the intravascular indwelling device (3) is connected to the drug solution injection part. Continuous drug infusion device with vascular balloon.