JPH0214065B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vaporizer for inhalation anesthesia, and particularly to an improvement in an anesthetic solution injection/discharge device into the vaporizer.

(Prior Art) In recent years, inhalation anesthesia has been used for general anesthesia for the first time due to the ease of controlling the anesthetic effect.

Inhalation anesthesia is performed by vaporizing a volatile anesthetic solution in a vaporizer by a gas flow such as oxygen or nitrous oxide passing through the vaporizer, and inhaling the mixture into the patient.

Conventionally, in order to inject and drain anesthetic solution into this anesthesia vaporizer, the threaded cap of the vaporizer was removed,
Inject the anesthetic solution into the vaporizer to a certain level by injecting it into the socket, while loosening the screw at the bottom of the vaporizer and pouring the anesthetic solution into the vaporizer into the empty container placed below. Drainage was accomplished by allowing the liquid to drain naturally.

This injection/draining method does not require special equipment and is extremely simple and convenient, but it is important to avoid the risk of accidentally injecting a different type of anesthetic into the vaporizer, which should be dedicated to each type of anesthetic. Can not.

If you mistakenly inject another type of anesthetic into a vaporizer dedicated to a specific anesthetic solution, or if you refill a specific anesthetic solution that was previously in the vaporizer with another type of anesthetic solution.・When used in combination, there is a strong possibility that it may pose a danger to the patient, and may even lead to fatal results.

In order to avoid such risks, methods are used to call the user's attention with cautionary notes and color-coded signs for each anesthetic solution, but in order to reliably prevent mistakes, it is necessary to physically There is a need for a device that allows only the anesthetic solution container to be used in conjunction with its own vaporizer.

For this reason, a flexible connection that can be connected only to a dedicated anesthetic solution container at one end and only to the inlet of a dedicated vaporizer at the other end and cannot be connected to other anesthetic solution containers or vaporizers. A device has been proposed that uses a conduit to inject and discharge anesthetic solution into a vaporizer. (Tokuko Akira
(No. 48-8197) However, this device does not allow injection of anesthetic solution.
Requires a separate flexible connecting conduit for drainage;
Not only is it inconvenient to store and handle the connecting pipe, but there is also the problem that the anesthetic solution remaining in the connecting pipe vaporizes after use and cannot be prevented from being inhaled by an anesthesiologist or the like nearby.

(Purpose of the Invention) This invention enables only a specific anesthetic solution container to be connected to a specific vaporizer without requiring any other special equipment, and the anesthetic solution can be injected and discharged with simple operations. The present invention aims to provide an injection/discharge device in which less liquid remains at the connecting portion.

(Structure of the Invention) One embodiment of the injection/discharge device for a vaporizer according to the present invention will be described in detail with reference to the drawings.

The figure shows a cross-sectional view of the anesthetic solution container connected to the injection/discharge device of the vaporizer. 1 is an anesthetic solution container, remove the screw cap, and insert the passage switching valve 3.
It is screwed into the attachment/detachment opening 11 of the. The attachment/detachment opening 11 is shaped to fit only the opening of a specific container, so different types of anesthetic solution containers will not be attached.

The passage switching valve 3 is rotatably attached to a valve case 4 provided on the side wall of the vaporizer main body 12, and has two gas-liquid passages 8 and 9 therein. In the upper passage 6, when discharging (third
In the figure, a pipe 5 extending into the container 1 is fixed to the end of the passage 8 communicating with the lower passage 7 on the side of the attachment/detachment opening 11.

The valve case 4 is provided with gas-liquid passages 6, 7 that communicate with the inside of the vaporizer 12, corresponding to the gas-liquid passages 8, 9 at the two positions of the passage switching valve 3. 9 is communicated with or disconnected from by the rotary valve 2.

The vaporizer having the above configuration is used as follows.
A storage container 1 containing a certain type of anesthetic solution is screwed into a removable opening 11 having a shape that fits only the opening of the container, resulting in the state shown in FIG. 1.

Next, the passage switching valve 3 is rotated 180 degrees to place the container 1 in an inverted state, and the rotary valve 2 is rotated to connect the passages 6, 8 and the passages 7, 9.
(FIG. 2) As a result, the anesthetic solution in the container 1 is injected into the vaporizer through the passages 9 and 7. at the same time,
The air in the vaporizer flows into the container 1 through passages 6, 8 and pipe 5.

When the liquid level 10 in the vaporizer rises and closes the mouth of the passage 6, the flow of air into the container 1 is stopped, and the injection of anesthetic solution into the vaporizer is also stopped. Therefore, the injection of liquid into the vaporizer always stops at a constant level. If the rotary valve 2 is rotated to close the communication between the passages 6 and 8 and the passages 7 and 9, the communication between the vaporizer main body 12 and the container 1 will be cut off, and the anesthetic liquid level in the vaporizer will be cut off. will not rise above the specified limit.

If necessary, when storing the anesthetic solution remaining in the vaporizer in a container, as shown in FIG. 3, the container 1 is screwed into the attachment/detachment opening 11 and kept in a hanging state. Next, when the rotary valve 2 is rotated to connect the passages 6, 9 and the passages 7, 8, the anesthetic solution in the vaporizer flows down into the container 1 through the passages 7, 8 and the pipe 5, while the Air flows into the vaporizer through passages 9,6. In addition, if necessary, a vent hole is separately provided in the valve case 4, and after the remaining anesthetic solution is collected into a container, the rotary valve 2 is rotated to close the communication between the passages 6, 7 and the passages 8, 9. ,
The gas-liquid passage 8 can be configured to communicate with the outside air through the ventilation hole only temporarily during the process.

This ensures that the anesthetic solution remaining in the gas-liquid passage 8 and the pipe 5 flows down into the container 1,
When the anesthetic solution storage container 1 is removed, residual vaporized gas generated due to evaporation of the anesthetic solution remaining in this part can be minimized, and environmental contamination in the operating room can be kept to a minimum.

In the above embodiment, the container 1 at the time of injection/drainage
has been rotated 180 degrees and is in an inverted and hanging position.
In reality, it may be inclined at 20 to 30 degrees, and therefore the rotation range may be about 120 degrees.
Therefore, when the container is inverted or erect, it is not only vertically inverted or hanging as shown in the figure, but also when the main body of the anesthetic solution container is placed in a specific position where injection and discharge are possible, that is, in the inflow and outflow passage of the drug solution and air. It means a high position and a low position. At this time, it goes without saying that the communication port of the rotary valve must be able to open and close the two gas-liquid passages at each position.

(Effects of the Invention) The vaporizer of the present invention has the above-mentioned configuration, and since the attachment/detachment port only fits with the opening of a specific type of anesthetic solution storage container, there is no risk of accidentally injecting another type of anesthetic solution. .

Since the container can be directly attached to the passage switching valve provided on the side wall of the vaporizer for injection and discharge, and no other special members are required, management is easy.

Two air-liquid passages are provided to separate the inflow of the anesthetic solution and the accompanying outflow of air, so the inflow and outflow are smooth, and when the medicinal solution blocks the air passage, the inflow of the medicinal solution is automatically stopped. , the drug level during injection is maintained constant.

The two passages can be shut off by a rotary valve, allowing the container to be attached and removed while maintaining the airtightness of the vaporizer.

It has remarkable effects such as

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of one embodiment of the injection/discharge device for an anesthesia vaporizer according to the present invention, and FIGS. 2 and 3 are cross-sectional views showing the state of injection and discharge of a medicinal solution, respectively. 1: Anesthetic solution storage container, 2: Rotary valve,
3: Passage switching valve, 4: Valve case, 5:
Pipe, 6, 7, 8, 9: gas-liquid passage, 11: attachment/detachment port, 12: vaporizer main body.

Claims (1)

[Claims] 1. A passageway for the inflow and outflow of the medicinal solution and air is provided on the side wall of the vaporizer body, and a passageway for the inflow and outflow of the medicinal solution and air is provided at a specific position communicating with both passages, and a specific type of anesthetic solution is stored at one end of the passageway. A passage switching valve having an attachment/detachment port to which only a container can be attached is rotatably fixed, and at a specific position of the anesthetic solution storage container attached to the attachment/detachment port, the passage for inflow/outflow of the vaporizer main body and the outflow of the valve are connected. A drug solution injection/discharge device for an anesthesia vaporizer, characterized in that the drug solution injection/discharge device is configured to communicate with an administration passage.