JPH0336358Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for injecting a medicinal solution such as an enema into the body.

In hospitals and other medical institutions, enemas have traditionally been administered using syringe-type enema equipment and with the help of others such as nurses. Disposable enema devices are becoming popular. However, with conventional disposable enema devices, when the cap of the tip nozzle is removed, the medicinal liquid container body is soft, so the medicinal liquid may squirt out even if a slight pressure is applied to the circumferential wall of the container. If the tip nozzle is lower than the container body, the chemical liquid will flow out due to gravity, making it difficult for unskilled people to handle it.

In addition, when an enema is given, normally 2 to 5 minutes after injection, the urge to defecate becomes stronger before defecating, but if physical stimulation is given to the rectum by the enema solution, the urge to defecate becomes stronger midway through the injection, and the urge to defecate becomes stronger. You may become unable to defecate. Therefore, it is necessary to warm the medicinal solution to a temperature slightly higher than body temperature (approximately 40°C), and to avoid sudden physical stimulation, such as by slowly injecting it. However, with conventional disposable enema devices, an unskilled person tends to apply strong pressure to the container from the beginning, in which case a large amount of drug solution is injected at once, irritating the rectum, and is likely to fail.

The present invention provides a medical solution such as an enema solution, comprising a flexible collapsible drug solution container and a flexible injection tube communicating with the drug solution container at one end and having a nozzle for injecting the drug solution at the other end. In the injection device, in series with the injection tube, the flow path of the tube is normally closed, but operates to open the flow path within the tube in response to a predetermined pressure within the drug solution container. a check valve, the check valve comprising: a small diameter cylindrical peripheral wall protruding from the drug solution container into the injection tube; a generally hemispherical end wall closing a distal end of the cylindrical peripheral wall; and the hemispherical end wall. Provided is a liquid medicine injection device comprising a slit dividing the cylindrical peripheral wall and the hemispherical end wall into two, the cylindrical peripheral wall and the hemispherical end wall being made of an elastic material.

The present invention will now be described in detail with reference to some specific examples shown in the accompanying drawings.

FIG. 1 is a front view of the device of the present invention, which includes a drug solution bag 1 made of soft plastic, such as low density polyethylene. The bag is generally oval or otherwise shaped and sized to be easily grasped and compressed by hand, and has a relatively rigid port 2. The port 2 can also be attached by integrally molding it to be thicker than the main body of the container 1. Chemical injection tube 3
has one end inserted into the outside of the port 2 to communicate with the container 1, and the other end is provided with a nozzle 4 of ordinary construction. The tube 3 is made of flexible, preferably transparent plastic, such as polyvinyl chloride, and the nozzle 4 is made of high density polyethylene, polypropylene,
It is preferably made of hard plastic such as nylon. The tip of the nozzle 4 is normally sealed with a cap 5.

According to the present invention, the check valve 2 is provided in the injection tube 3.
0 is set. One embodiment of the check valve 20 is illustrated in FIG. The container port 2 has an annular protrusion 10 on its outer periphery to maintain fitting with the tube 3.
The port body is composed of a port body having a diameter of 10 mm, and a small diameter cylinder 7 whose tip is closed and coaxially protrudes from the tip of the port body.

In the specific example shown in FIG. 2, a small diameter cylinder 7 protruding from the port 2 has an opening 8 at its tip. The cylinder 7 is covered by a resilient hollow dome 12 which is generally dome-shaped or bell-shaped and has a slit 14 bisecting the domed top.

The embodiment of FIG. 3 is similar to the embodiment of FIG. 2, except that the hollow dome 12 and cylinder 7 are integrally molded from resilient plastic. In use, when the cap 5 is removed and the nozzle 4 is inserted into the anus and the container 1 is compressed, the increased pressure of the medicinal solution causes the slit 14 at the top of the dome 12 to change from state A to state B in FIG. The drug liquid flows into the tube 3 through the gap, is ejected from the nozzle 4 through the gap, and is injected into the body. that time,
Unless a pressure is applied to the chemical solution in the container 1 that overcomes the force that causes the slit 14 to tightly tighten due to its elasticity, the drug solution will not flow out from the nozzle 4.
The opening 8 will not open if the nozzle 4 is placed below the container 1 with the cap 5 removed, or if the container 1 comes into contact with an object. In addition, due to the elastic restoring force of the dome 12, the flow rate of the medicinal solution gradually increases at first without particularly adjusting the force that presses the container 1, and then the flow rate becomes proportional to the pressure applied to the container. Avoid stimulating the environment.

On the other hand, when the pressurization of the container 1 is stopped and the inside of the container 1 becomes negative pressure, the slit 14 immediately comes into close contact with the container 1.
Air and chemical liquid are prevented from flowing back into the container 1 through the tube 3.

It will be obvious that the present invention can be used not only as an enema device but also as a device for injecting medicinal liquid into a body cavity for other purposes, such as a vaginal irrigation device.

[Brief explanation of the drawing]

Figure 1 is a front view of the liquid drug injection device of the present invention, Figure 2
The figure is an enlarged sectional view of the main part of one specific example, and FIG. 3 is an enlarged sectional view of the main part of another specific example. 1 is a chemical liquid container, 2 is a port, 3 is an injection tube, 4 is a nozzle, 5 is a cap, and 20 is a check valve.

Claims (1)

[Scope of utility model registration request] A drug solution injection device for enema liquid, etc., comprising a flexible collapsible drug solution container and a flexible tube communicating with the drug solution container at one end and having a nozzle for injecting the drug solution at the other end. A check valve is provided in the tube, which normally closes the flow path in the tube, but operates to open the flow path in the tube in response to a predetermined pressure of the drug solution in the drug solution container. , the check valve includes a small-diameter cylindrical peripheral wall protruding from the drug solution container into the injection tube, a generally hemispherical end wall that closes the tip of the cylindrical peripheral wall, and a slit that bisects the hemispherical end wall. A liquid medicine injection device characterized in that the cylindrical peripheral wall and the hemispherical end wall are made of an elastic material.