JPS6317485Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a flow rate adjustment device for preventing anesthesia errors by ensuring that oxygen is also circulated at the same time as anesthetic gas is used, thereby preventing the patient from inhaling anoxic gas.

Conventionally, in general anesthesia equipment, as shown in Figure 4, anesthetic gas such as laughing gas and oxygen are passed through separate flowmeters and then combined to supply a mixed gas to the patient's breathing circuit. ing.

Therefore, adjusting the mixing ratio and flow rate of anesthetic gas and oxygen requires individually operating and adjusting each flow meter. For this reason, when it is necessary to stop the flow of laughing gas and allow oxygen to flow, such as during awakening from anesthesia, an accident can easily occur in which the oxygen control valve is closed and the laughing gas valve is opened, causing the patient to suffer from severe hypoxia. .

This invention eliminates these drawbacks of the conventional method and makes it possible to easily and reliably ensure that oxygen also flows when anesthetic gas is flowed, automatically adjusting the minimum mixing ratio of oxygen that does not cause oxygen deficiency. Its main purpose is to provide a device that allows oxygen to be introduced at the same time even when only the handle of the anesthetic gas flow control valve is opened or closed, in order to prevent anesthesia errors. be.

The main structure is that a mobile on-off valve is interposed between the anesthetic gas inlet pipe and the anesthetic gas outflow pipe, which are installed at a predetermined position on the flow control device main body, and when this mobile on-off valve opens, oxygen The inlet pipe and the oxygen outflow pipe are automatically connected to each other.

Therefore, according to this device, the oxygen flow operation is reliably performed during the anesthetic gas flow operation, and accidents caused by inhaling only the anesthetic gas can be prevented.

Next, an embodiment of this invention will be explained with reference to the drawings. In FIG.
An anesthetic gas introduction tube 8 and an oxygen introduction tube 9 are connected to the anesthetic gas introduction tube 8 and the oxygen introduction tube 9, respectively. Further, the safety device main body 1 is equipped with an operating handle 5 for anesthetic gas distribution, which has an on-off valve 6 at its tip and operates in conjunction with the anesthetic gas introduction tube 8 and oxygen introduction tube 9.

The anesthetic gas and oxygen that have passed through the inside of the safety device main body 1 flow through the anesthetic gas outflow pipe 29 and the oxygen outflow pipe 12, respectively, and the flow rates are measured by the flowmeters 10, 10 on a scale indicating the outflow state. Check. The anesthetic gas and oxygen that have passed through the flowmeters 10, 10 become a heated gas and are supplied to the breathing circuit through the air supply path 11. Reference numeral 7 designates a rotating handle 7 exclusively for oxygen, which is used when only oxygen flows out from the oxygen introduction pipe 9.

Next, in the embodiment shown in FIG.
A valve body 2 through which oxygen flows is provided at the end thereof, a connecting cylinder 3 is connected to the valve body 2 via a moving diaphragm 17, and a valve cylinder 4 is connected to the connecting cylinder 3 via a diaphragm 19. It is constructed by being connected together through. The valve body 2 includes an oxygen inlet pipe 9 and an oxygen outlet pipe 12.
and a spring 15 and a slide valve 1 inside.
A storage chamber 24 is formed to house the 4.
A valve seat 13 that is closed by the sliding valve 14 is formed in the storage chamber 24 . This valve seat 13
The oxygen inlet pipe 9 and the oxygen outlet pipe 12 are kept in a shut off state by a sliding valve 14 except when in use.

Next, the connecting cylinder 3 has a gap 16 formed at its end adjacent to the diaphragm 17 and into which the push plate 23 moves. Further, an anesthetic gas introduction pipe 8 is connected to one side of the connecting cylinder 3, and an inner cylinder 18 for enclosing a diaphragm 19 is installed inside. A valve chamber 26 is formed inside the inner cylindrical body 18, and a movable valve body 20 that can be raised and lowered is accommodated in the valve chamber 26. An inflow chamber 21 into which anesthetic gas flows is formed inside the movable valve body 20, and a flow path 2 is communicated with the inflow chamber 21.
2 is formed. A needle-like protrusion 31 at the tip of the on-off valve 6 is inserted into the flow path 22 so as to be openable and closable.

Next, the valve cylinder body 4 has a reservoir chamber 28 formed therein into which the anesthetic gas from the flow path 22 enters, and an anesthetic gas discharge pipe 29 communicating with the reservoir chamber 28 on one side. Reference numeral 27 indicates packing such as airtight rings used in various places.

To explain the operating state of the embodiment with the above configuration, when the operation handle 5 is turned in the opening direction, the needle-like protrusion 31 at the tip of the on-off valve 6 retreats, and at the same time, the movable valve body 2
0 also descends together, and the diaphragm 19 curves through the gap in the direction of the anesthetic gas valve chamber 26 via the spring 15, the sliding valve 14 pressed by the gas pressure, the diaphragm 17, and the push plate 23. . By lowering the sliding valve 14, the closed valve seat 13 is opened, and oxygen flows from the oxygen inlet pipe 9 to the oxygen outlet pipe 1.
2 is obtained and distributed to the flow meter 10. Further, when the anesthetic gas that flows in from the anesthetic gas introduction pipe 8 and fills the valve chamber 26 and the inflow chamber 21 rotates the handle 5 further in the opening direction, the needle-like protrusion 31 is separated from the movable valve body 20 and the gap is removed. passing through the gap in the flow path 22 to the reservoir chamber 2.
8 and an anesthetic gas outflow pipe 29 are obtained to flow to the flow meter 10. Thereafter, a gas supply path 11 for the mixed gas is obtained and inhaled by the patient.

Next, in the embodiment shown in FIG. 3, an oxygen inlet pipe 9 and an oxygen outlet pipe 12 are installed in the safety valve main body 1 in a perpendicular direction, and a movable valve body 20 is housed therein so as to be able to move up and down. The movable valve body 20 is provided with a pressure contact valve 25 on the upper part thereof which is pressed against the valve seat 13 to close the valve, and a protrusion 30 which is pressed by the spring 15 is formed on the outer periphery.

Further, inside the movable valve body 20, an inflow chamber 21 is provided.
A flow path 2 communicating with the inflow chamber 21 is provided.
2 is formed. An on-off valve 6 having a needle-like protrusion 31 at its tip is screwed into the flow path 22 . To explain how to use this structure, when the operation handle 5 is rotated in the opening direction, the on-off valve 6 is lowered and the flow passage 22 is opened, and laughing gas from the anesthetic gas introduction tube 8 enters the inflow chamber 21. The moving valve body 2
0 is lowered by the pressure and the pushing force of the spring 15, and the upper pressure valve 25 is opened to release oxygen to the oxygen outlet pipe 12.
It flows to. At this time, when the operating handle 5 is further rotated in the opening direction, the laughing gas from the anesthetic gas introduction pipe 8 passes through the gap created between the inflow chamber 21 and the flow path 22 and flows into the anesthetic gas discharge pipe 29. The mixed gas is mixed with oxygen in the oxygen outflow pipe 12 to form a gas supply path 11, which is inhaled by the patient.

Furthermore, what is shown in FIG. 4 is for explaining a conventional anesthesia device, in which an anesthetic gas introduction tube 8 and an oxygen introduction tube 9 are connected from the side wall of an anesthesia machine box 32, and the tips of these tubes are directly connected to each flow rate. A volatile anesthetic mixer 34 is obtained by separately connecting the two gases 10, 10, and by operating the respective inflow control valves 33, 33, to obtain a volatile anesthetic mixer 34, which leads to a mixed gas outlet pipe 35. , into the patient's inhalation circuit.

As described above, according to the device for preventing anesthesia mistakes of this invention, when operating and flowing anesthetic gas, a fixed amount of oxygen gas is automatically flowed, so it has the effect of absolutely preventing mistakes in inhaling only anesthesia gas. There is.

Furthermore, the anesthetic gas inlet pipe, the anesthetic gas outflow pipe, and the oxygen inlet pipe and oxygen outflow pipe are connected to each other at predetermined positions on the safety valve main body, so the safety valve main body can be significantly downsized as a whole, and can be installed lightweight. It has an excellent effect that is easy to use.

In addition, by interposing a movable on-off valve between the anesthetic gas introduction pipe and the anesthetic gas discharge pipe, the movable valve body also moves reliably in conjunction with the rotation operation of the on-off valve, and the on-off valve can be rotated. It has the excellent effect of being able to appropriately adjust the amount of anesthetic gas discharged in response to opening and closing.

[Brief explanation of the drawing]

Fig. 1 is a side view systematically showing an example of this invention, Fig. 2 is a sectional view showing an example of a safety valve, Fig. 3 is a sectional view showing an example of another safety device, and Fig. 4 is a sectional view showing an example of the safety valve.
The figure is an explanatory diagram showing a conventional device. Reference numeral 1 is the safety device main body, 4 is the valve cylinder body, 6 is the on-off valve, 8 is the anesthetic gas introduction pipe, 9 is the oxygen introduction pipe, 11
is an air supply path, 12 is an oxygen outflow pipe, 13 is a valve seat, 15
20 is a moving valve body, 21 is an inflow chamber, 22 is a flow path, 28 is a reservoir chamber, and 29 is an anesthetic gas outflow pipe.

Claims (1)

[Scope of utility model registration request] In a safe flow rate adjustment device for preventing anesthesia mistakes, which has an on-off valve 6 that operates in conjunction with an anesthetic gas introduction pipe 8 and an oxygen introduction pipe 9, the safety flow rate adjustment device main body 1 includes:
A valve body 2 through which oxygen flows is provided at the end, and a connecting cylinder 3 is connected to the valve body 2 via a movable diaphragm 17, and a valve cylinder 4 and a diaphragm 19 are connected to the connecting cylinder 3. The valve body 2 is provided with the oxygen inlet pipe 9 and the oxygen outflow pipe 12, and has a storage chamber 24 for housing the spring 15 and the slide valve 14 therein. In addition, a gap 16 is formed in the connecting cylinder 3 adjacent to the diaphragm 17 in which the push plate 23 moves, and an anesthetic gas introduction pipe 8 is connected to one side of the connecting cylinder 3. , an inner cylindrical body 18 that sandwiches a diaphragm 19 is formed inside the inner cylindrical body 18, a valve chamber 26 is formed inside the inner cylindrical body 18, and a movable valve body 20 that can be raised and lowered is housed in the valve chamber 26. , the movable valve body 20 includes:
An inflow chamber 21 is provided inside, and a flow path 22 communicating with the inflow chamber 21 is formed. A needle-like protrusion 31 at the tip of the on-off valve 6 is inserted into the flow path 22 so as to be openable and closable, and the valve barrel is inserted into the flow path 22. The body 4 is provided with a reservoir 28 into which the anesthetic gas from the flow path 22 enters, and an anesthetic gas discharge pipe 29 communicating with the reservoir 28 is formed on one side. Safety flow regulator.