JPS6349513B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention includes a CO ₂ absorption device and has an annular conduit forming an inhalation branch and an exhalation branch, in which case a controllable exhaust valve is arranged in the exhalation branch. Anesthesia device for inhalation anesthesia, switchable between half-open and half-closed operating modes.

For example, an anesthesia machine that is switchable between half-open and half-closed operating modes is an embodiment according to Dragerwerk AG's brochure 51/61 3rd edition (July 1970). "Narkosespiromat" belongs to the known technology. In this case, various operations are required for re-preparation.

A switchable anesthesia device is described in British Patent Specification No.
No. 1193522 and also West German Patent Publication No.
Described in No. 2945485. In this case, switching valves are provided in each case, which, depending on the mode of operation, close the inspiratory circulation and open outwards in a half-open operation.

It is recognized that these known switchable embodiments are disadvantageous in that the switching between the two operating modes does not take place clearly enough and in the case of a large number of control operations, inter alia it is possible for incorrect operations to occur which are not directly detected. .

The object underlying the invention is to provide an especially simple and clear changeover point between half-open and half-closed operating modes in an anesthesia machine of the type mentioned above, and to thereby increase the safety of the machine. . The solution to this problem is that the absorption device has an easily visually monitored accessory casing that can be attached to the base casing of the anesthesia device, is placed in the exhalation manifold and has a fixed connection to the base casing. formed as a switching member releasable from the member;
and one fixed connecting member has a shut-off member actuated by the absorber, which serves as a switching element, and which shuts off the annular conduit and separates the breathing device when the absorber is removed. This is achieved in that a second fixed connection element, which forms a branch pipe and is open during said removal, is arranged behind the controllable exhaust valve.

In this embodiment, the mounting element which characterizes the semi-closed operating mode, ie the CO ₂ absorption device, is directly and explicitly used as the switching element. If the CO ₂ absorber is connected, in each case a half-closed operating mode is arranged, and if the CO ₂ absorber is removed and absent, the device is now safely operated in the half-open operating mode You can start from that. Such a device is technically simple in construction and eliminates the risk of erroneous operation.

Advantageously, a quick coupling member can be provided for inserting and releasing the absorption device into the connecting position. For example, such a quick connection element is advantageously designed as a lockable connection plug.
It is therefore possible to connect and disconnect the absorption device in a single operation and at the same time to carry out a reliable switch to the desired operating mode.

Optionally, advantageously, the anesthetic breathing device can be installed in an accessory casing that is attachable to the base casing of the anesthesia breathing device and can be easily monitored visually.
By installing an obvious monitorable member, the operator is clearly informed of the mode of operation he has selected. Switching is possible even during anesthesia, which increases the flexibility of the device.

Another possible advantage is that the absorption device is designed as a container divided into two chambers by a partition wall with permeable slits, and the same connecting element is provided in the two connecting positions, so that the attachment of the absorbent body is carried out in the connecting element. This can be obtained by being provided with the possibility of taking turns. Such a symmetrical structure allows the breathing lime filling of these two chambers to be fully utilized. When the respirable lime in the first chamber is consumed, the absorber, which is easily releasable from its casing-fixed connection position, can be swiveled through 180° and connected again, so that the inlet compartment An advantageous use is made of the respirable lime therein.

The invention will be explained in detail below with reference to drawing examples.

FIG. 1 shows an annular conduit 1 through which purified gas is supplied from a purified gas source 2 or via a ventilator (or manual breathing bag) 3. FIG. Check valves 7, 8 are arranged in the two inspiratory branch pipes 4, 5 before the patient-side outlet 6. Furthermore, an exhaust valve 10 that can be controlled by breathing pressure is connected to the exhalation branch pipe 5 via a connecting pipe 9.
is located.

For safety reasons, an additional air valve 11 and an adjustable overpressure valve 12 are provided. The additional air valve 11 allows the supply of atmospheric air into the breathing apparatus in case of insufficient purified gas supply, and the overpressure valve 12 ensures pressure equilibrium in case of an unacceptable pressure build-up on the supply side. enable. Exhaust valve 10 in flow direction
Behind the absorber device 15 is arranged, which is designed as a releasable switching element and is connected to two connecting elements 13, 14.

In the half-open operating mode, the intake manifold 4 is supplied with purified gas from the purified gas source 2 or via the ventilator 3 . During inspiration by compressing the bellows of a breathing apparatus or manual breathing bag, inspiratory gas is supplied to the patient 6 via the check valve 7 . In this case, a pressure is created in the control line 9 which closes the exhaust valve 10. The patient breathes inhaled gas. Then, during exhalation by depressurizing the bellows or manual breathing bag, the pressure in the control tube 9 decreases, causing the check valve 8 as well as the exhaust valve 1 to decrease.
0 is opened. The exhaled gas from the patient 6 thus escapes via the connecting member 13 which is open or connected to the anesthesia continuous tube.

In this mode of operation, the absorber 15 is removed and
The connecting element 14 is thereby closed by the forcedly actuated shut-off element 16, so that instead of the closed annular conduit 1 two separate exhalation branches 4, 5 are arranged.

In order to enter the semi-closed operating mode, a specific element, the absorption device 15, is inserted between the connecting elements 13, 14. In this case, the blocking member 16 of the connecting member 14
is forcibly opened, and the two breathing branch pipes 4, 5
are connected to one closed annular conduit 1 into which purification gas can be supplied from a purification gas source 2.

FIG. 2 shows the structure of the device according to the invention, in which the anesthetic breathing device is mounted in the base casing 17. In this case, the absorption device 15 is designed as a container with the same width and depth as the base casing 17 of the anesthesia breathing device. This provides a particularly clear and visually easily monitorable indication of the existing operating mode.

Lockable quick-connection members are arranged on the connecting members 13, 14, which enable a gas-tight connection.
A stop valve is provided in the connecting element 14 as a forcedly actuated shut-off element 16 . The connection member 13 contains a quick connection member that can be connected to an anesthetic gas guide tube using a matching connection member.

As is evident from the internal structure of the container 22 represented by the dashed line, the two parts separated by the partition wall 18
Two chambers 20, 21 are provided and are interconnected via a transmission slit 19 in the bottom of the container. These two chambers 20, 21 have a filling made of absorbent material, which fills the transmission slit 1.
Also fill in 9. By rotating the container 22 through 180[deg.], the chamber 21, which was initially arranged on the outflow side, can now be connected to the inflow side, so that a sufficient utilization of the absorbent filling is achieved.

[Brief explanation of drawings]

FIG. 1 is a schematic system diagram of an anesthesia device according to the present invention;
and FIG. 2 is a perspective view schematically showing an embodiment of the apparatus of FIG. 1... Annular conduit, 2... Purified gas source, 3... Artificial respirator, 4... Inhalation branch pipe, 5... Exhalation branch pipe, 6... Patient side outlet, 7, 8... Check valve, 9...
... Connection pipe, 10 ... Exhaust valve, 11 ... Additional air valve, 12 ... Overpressure valve, 13, 14 ... Connection member of absorption device, 15 ... Absorption device, 16 ... Stop valve,
17... Base casing, 18... Partition wall,
19... Transmission slit, 20, 21... Absorbent material storage chamber, 22... Container.

Claims (1)

[Scope of Claims] 1 Having an annular conduit 1 containing a CO ₂ absorption device 15 and forming an inhalation branch pipe 4 and an exhalation branch pipe 5,
In an anesthesia device which can be switched between half-open and half-closed operating modes, in which case an absorption pressure-controlled exhaust valve 10 is arranged in the exhalation branch, the absorption device 15 is connected to the base casing of this anesthesia device. 17 with an easily visually monitored accessory casing arranged in the exhalation branch 5 and designed as a switching element releasable from the connecting elements 13, 14 fixed to the base casing; And one fixed connection member 14 is
It has a shut-off element 16 which is actuated forcibly by the absorption device 15 and serves as a switching element, which shuts off the annular conduit 1 when the absorption device 15 is removed and which separates the separate breathing branches 4, 5. Anesthesia device for inhalation anesthesia, characterized in that a second fixed connection member 13 formed and opened during removal is arranged behind the controllable exhaust valve 10. 2. Claim 1, characterized in that a quick coupling member is provided for attaching and releasing the absorption device 15 to and from the connecting members 13, 14.
Anesthesia device for inhalation anesthesia as described in Section 1. 3. Anesthesia device for inhalation anesthesia according to claim 2, characterized in that the three-speed coupling members 13, 14 are lockable coupling plugs. 4. The absorption device 15 is designed as a container 22 divided into two chambers 20, 21 by a partition wall 18 with a permeable slit 19, and the two connecting members 13, 14 are provided with the same connecting member, thus Anesthesia device for inhalation anesthesia according to claim 1, characterized in that the absorption device (15) can be attached by alternating the connecting members (13, 14).