CA1210304A - Valve system for venting anesthesia or analgesia apparatus and the like and valves therefor - Google Patents
Valve system for venting anesthesia or analgesia apparatus and the like and valves thereforInfo
- Publication number
- CA1210304A CA1210304A CA000433091A CA433091A CA1210304A CA 1210304 A CA1210304 A CA 1210304A CA 000433091 A CA000433091 A CA 000433091A CA 433091 A CA433091 A CA 433091A CA 1210304 A CA1210304 A CA 1210304A
- Authority
- CA
- Canada
- Prior art keywords
- inlet
- valve
- gas
- room
- venting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0087—Environmental safety or protection means, e.g. preventing explosion
- A61M16/009—Removing used or expired gases or anaesthetic vapours
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/14—Check valves with flexible valve members
- F16K15/144—Check valves with flexible valve members the closure elements being fixed along all or a part of their periphery
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Environmental Sciences (AREA)
- Emergency Medicine (AREA)
- Pulmonology (AREA)
- Ecology (AREA)
- Heart & Thoracic Surgery (AREA)
- Environmental & Geological Engineering (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Biodiversity & Conservation Biology (AREA)
- Mechanical Engineering (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A valve system is provided for venting an anesthesia apparatus in a room space, such as an operating theatre, to the atmosphere outside the room, so as to prevent unwanted build-up of escaping anesthesia gas in the room, together with a venting valve for that purpose. The venting valve has two inlets, each with a respective one-way valve, and a single outlet meeting at an interior junction. Pipe means connect the anesthesia apparatus to one inlet, and the one-way valves ensure that gas flows only to the atmosphere. Other pipe means connect the room interior to the other inlet and again the one-way valves ensure only flow of gas from the room interior to the atmosphere.
Further pipe means connect the outlet to the exterior atmosphere. Preferably the one-way valves are flexible diaphragm valves that are moved by gas movement and pressure into and out of engagement with rigid diaphragm supports to respectively close and open the valve.
A valve system is provided for venting an anesthesia apparatus in a room space, such as an operating theatre, to the atmosphere outside the room, so as to prevent unwanted build-up of escaping anesthesia gas in the room, together with a venting valve for that purpose. The venting valve has two inlets, each with a respective one-way valve, and a single outlet meeting at an interior junction. Pipe means connect the anesthesia apparatus to one inlet, and the one-way valves ensure that gas flows only to the atmosphere. Other pipe means connect the room interior to the other inlet and again the one-way valves ensure only flow of gas from the room interior to the atmosphere.
Further pipe means connect the outlet to the exterior atmosphere. Preferably the one-way valves are flexible diaphragm valves that are moved by gas movement and pressure into and out of engagement with rigid diaphragm supports to respectively close and open the valve.
Description
Valve System for Ventin~ Anesthesia or anal~esia Ap~aratus and the llke and Valves Therefor . . . _ _ . =
Field of the Invention ~ --m The present invention is concerned with a new valve system for venting anesthesia or analgesia apparatus and the like, and with a valve for such a system.
Review of the Prior Art The use of anesthesia or analgesia apparatus or the likè (hereinafter referred to for brevity as anesthesia apparatus) is in practice almost exclusively confined to ~ enclosed spaces, such as operating rooms in hospitals and surgexies. Even if the apparatus is of the rebreathing type it must include a pressure relief valve, through which at least some of the anesthetizing gas escapes into the surrounding area where it can accumulate to an uncomfortable, if not unsafe, concentration. The possibility of such an accumulation is of course substantially greater with apparatus of the direct flow type. To avoid the possibility of such a condition the room could be vented to atmosphere, but this again can be complicated, for example, in the case of an operating room requiring close control of ambient temperature and the maintenance at all times of maximum sterility, even when the outside temperature varies through the normal range of about -30 to 35C.
~2~ 4 Definition of the Invention It is therefore an object of the invention to provide a new valve system for venting anesthesia apparatus permitting venting of the apparatus to the exterior of the room in which it is accommodated.
It is also an object to provide a new venting valve for use in such a valve system.
In accordance with the present invention there is provided a valve system for the venting to the atmosphere outside a room space of anesthesia apparatus within the room space comprising:
vent valve means comprising a valve body having a first inlet, a second inlet and an outlet all meeting at a junction within the body;
pipe means for connecting to the first inlet an outlet of the anesthesia apparatus through which anesthesia gas can escape into the ambient space;
a first one-way valve at the first inlet permitting flow of gas from the first inlet to the junction and preventing reverse flow;
pipe means for connecting the ambient room space to the second inlet;
a second one--way valve at the second inlet permitting flow of gas from the second inlet to the junction and preventing reverse flow; and pip2 means for connecting the outlet to the ambient atmosphere outside the ambient room space.
3~
Also in accordance with the invention there is provided a vent valve means for the venting to the atmosphere outside a room space of ane~thesia apparatus within the room space comprising:
a valve body having a first inlet for connection ther~to of pipe means from the anesthesia apparatus, a second inlet for the connection therein of pipe means from the said room space, and an outlet for the connection thereto of pipe means to the said atmosphere, all meeting at a junction within the body;
- a first one-way valve at the first inlet permitting flow of gas from the first inlet to the junction and preventing reverse flow; and a second one-way valve at the second inlet permitting flow of gas from the second inLet to the junction and preventing reverse flow.
escri~tion of the Drawings A valve system for venting anesthesia apparatus and a venting valve therefor which are particular preferred embodiments of the invention will now be described, by way of example, with reference to the accompanying diagrammatic drawing, wherein:-FIGVRE 1 is a general perspective view of an anesthes;a apparatus illustrating the manner of use therewith of a valve system of the invention;
FIGURE 2 is a similar view to a larger scale of the valve used in the system illustrated by Figure 1, parts being shown broken away as necessary for the interior to be seen; and ~z9 ~3~4 FIGURES 3 and 4 are respectively plane cross sections ~aken on the lines 3-3 and 4-4 of Figure 2.
Description of the Preferred Embodiments _ The anesthesia apparatus with which the valve system of the invention is used can be of any type, either rebreathing or direct, although a rebreathing type apparatus is illustrated and is indicated by the general reference 10. The apparatus includes as an integral component thereof a relief valve 12 which, in the absence of the valve system invention would vent directly into the surrounding room space. However, a direct - vent to the outside atmosphere would cause difficulty because of the variation encountered in outside tempPratures and pressures with weather changes, resulting in the possibility of lack of adequate venting and inflow of outside air to a space which is required to be kept sterile and at a stable temperature.
In accordance with the invention therefore the apparatus 10 is vented to pipe means 14 from the valve 12 (or from its equivalent from which anesthetic gas may escape into the room), which pipe means connects the valve 12 to a first apparatus inlet 16 of a relief control valve 18 of the invention. Another pipe means 20 leads from one or more convenient locations in the room to a second room inlet 22 of the valve, the downstream side of which is connected at a junction 24 to the downstream side of the first inlet 16. The junction 24 is connected via pipe means 26 to any convenient point of the outside atmosphere.
~2~3~
The inlet-16 is provided inside the valve body with a respective one-way valve 28 that will open automatically upon appliction of pressure and flow from the relief valve 12 (arrow 30), but will close and prevent reverse flow upon application of S pressure and flow from the junction, and thus from the second inlet 22 and the outlet to the pipe 26 (arrow 32). Such a valve consists of a rigid flow through diaphragm brace or support 34 (see also Figure 3), mounted in the inlet 16 and.supporting when the valve is fully closed a flexible valve diaphragm 36 (see also Figure 4) that is moved toward and away from the support by pressure and flow of gas in the respective direction. The inlet 22 is provided with a respective similar one-way valve 38, which will close with pressure and flow from the junction, and thus from the atmosphere or inlet 16 (arrow 40), but will open with pressure and flow from the room interior (arrow 42).
Anesthesia gas escaping from the apparatus can therefore pass to the outside atmosphere without the possibility of entering the room, or of the room air and outside air reaching the apparatus interior. Similarly, if the room air pressure becomes substantially higher than that of the outside atmosphere relief is obtained by automatic opening of the valve 38 without the possibility of that air returning to the apparatus~ Increase in.the outside pressure will no~ permit any outside air to enter ~ither the room or the apparatus.
It wiLl be seen therefore that I have provided a simple but effective valve system for venting anesthetic apparatus from the room in which it is located which, because of the mechanical simplicity of the valve which it employs, is also highly reliable.
Field of the Invention ~ --m The present invention is concerned with a new valve system for venting anesthesia or analgesia apparatus and the like, and with a valve for such a system.
Review of the Prior Art The use of anesthesia or analgesia apparatus or the likè (hereinafter referred to for brevity as anesthesia apparatus) is in practice almost exclusively confined to ~ enclosed spaces, such as operating rooms in hospitals and surgexies. Even if the apparatus is of the rebreathing type it must include a pressure relief valve, through which at least some of the anesthetizing gas escapes into the surrounding area where it can accumulate to an uncomfortable, if not unsafe, concentration. The possibility of such an accumulation is of course substantially greater with apparatus of the direct flow type. To avoid the possibility of such a condition the room could be vented to atmosphere, but this again can be complicated, for example, in the case of an operating room requiring close control of ambient temperature and the maintenance at all times of maximum sterility, even when the outside temperature varies through the normal range of about -30 to 35C.
~2~ 4 Definition of the Invention It is therefore an object of the invention to provide a new valve system for venting anesthesia apparatus permitting venting of the apparatus to the exterior of the room in which it is accommodated.
It is also an object to provide a new venting valve for use in such a valve system.
In accordance with the present invention there is provided a valve system for the venting to the atmosphere outside a room space of anesthesia apparatus within the room space comprising:
vent valve means comprising a valve body having a first inlet, a second inlet and an outlet all meeting at a junction within the body;
pipe means for connecting to the first inlet an outlet of the anesthesia apparatus through which anesthesia gas can escape into the ambient space;
a first one-way valve at the first inlet permitting flow of gas from the first inlet to the junction and preventing reverse flow;
pipe means for connecting the ambient room space to the second inlet;
a second one--way valve at the second inlet permitting flow of gas from the second inlet to the junction and preventing reverse flow; and pip2 means for connecting the outlet to the ambient atmosphere outside the ambient room space.
3~
Also in accordance with the invention there is provided a vent valve means for the venting to the atmosphere outside a room space of ane~thesia apparatus within the room space comprising:
a valve body having a first inlet for connection ther~to of pipe means from the anesthesia apparatus, a second inlet for the connection therein of pipe means from the said room space, and an outlet for the connection thereto of pipe means to the said atmosphere, all meeting at a junction within the body;
- a first one-way valve at the first inlet permitting flow of gas from the first inlet to the junction and preventing reverse flow; and a second one-way valve at the second inlet permitting flow of gas from the second inLet to the junction and preventing reverse flow.
escri~tion of the Drawings A valve system for venting anesthesia apparatus and a venting valve therefor which are particular preferred embodiments of the invention will now be described, by way of example, with reference to the accompanying diagrammatic drawing, wherein:-FIGVRE 1 is a general perspective view of an anesthes;a apparatus illustrating the manner of use therewith of a valve system of the invention;
FIGURE 2 is a similar view to a larger scale of the valve used in the system illustrated by Figure 1, parts being shown broken away as necessary for the interior to be seen; and ~z9 ~3~4 FIGURES 3 and 4 are respectively plane cross sections ~aken on the lines 3-3 and 4-4 of Figure 2.
Description of the Preferred Embodiments _ The anesthesia apparatus with which the valve system of the invention is used can be of any type, either rebreathing or direct, although a rebreathing type apparatus is illustrated and is indicated by the general reference 10. The apparatus includes as an integral component thereof a relief valve 12 which, in the absence of the valve system invention would vent directly into the surrounding room space. However, a direct - vent to the outside atmosphere would cause difficulty because of the variation encountered in outside tempPratures and pressures with weather changes, resulting in the possibility of lack of adequate venting and inflow of outside air to a space which is required to be kept sterile and at a stable temperature.
In accordance with the invention therefore the apparatus 10 is vented to pipe means 14 from the valve 12 (or from its equivalent from which anesthetic gas may escape into the room), which pipe means connects the valve 12 to a first apparatus inlet 16 of a relief control valve 18 of the invention. Another pipe means 20 leads from one or more convenient locations in the room to a second room inlet 22 of the valve, the downstream side of which is connected at a junction 24 to the downstream side of the first inlet 16. The junction 24 is connected via pipe means 26 to any convenient point of the outside atmosphere.
~2~3~
The inlet-16 is provided inside the valve body with a respective one-way valve 28 that will open automatically upon appliction of pressure and flow from the relief valve 12 (arrow 30), but will close and prevent reverse flow upon application of S pressure and flow from the junction, and thus from the second inlet 22 and the outlet to the pipe 26 (arrow 32). Such a valve consists of a rigid flow through diaphragm brace or support 34 (see also Figure 3), mounted in the inlet 16 and.supporting when the valve is fully closed a flexible valve diaphragm 36 (see also Figure 4) that is moved toward and away from the support by pressure and flow of gas in the respective direction. The inlet 22 is provided with a respective similar one-way valve 38, which will close with pressure and flow from the junction, and thus from the atmosphere or inlet 16 (arrow 40), but will open with pressure and flow from the room interior (arrow 42).
Anesthesia gas escaping from the apparatus can therefore pass to the outside atmosphere without the possibility of entering the room, or of the room air and outside air reaching the apparatus interior. Similarly, if the room air pressure becomes substantially higher than that of the outside atmosphere relief is obtained by automatic opening of the valve 38 without the possibility of that air returning to the apparatus~ Increase in.the outside pressure will no~ permit any outside air to enter ~ither the room or the apparatus.
It wiLl be seen therefore that I have provided a simple but effective valve system for venting anesthetic apparatus from the room in which it is located which, because of the mechanical simplicity of the valve which it employs, is also highly reliable.
Claims (4)
1. A valve system for the venting to the atmosphere outside a room space of anesthesia apparatus within the room space comprising:-vent valve means comprising a valve body having a first inlet, a second inlet and an outlet all meeting at a junction within the body;
pipe means for connecting to the first inlet an outlet of the anesthesia apparatus through which anesthesia gas can escape into the ambient space;
a first one-way valve at the first inlet permitting flow of gas from the first inlet to the junction and preventing reverse flow;
pipe means for connecting the ambient room space to the second inlet;
a second one-way valve at the second inlet permitting flow of gas from the second inlet to the junction and preventing reverse flow; and pipe means for connecting the outlet to the ambient atmosphere outside the ambient room space.
pipe means for connecting to the first inlet an outlet of the anesthesia apparatus through which anesthesia gas can escape into the ambient space;
a first one-way valve at the first inlet permitting flow of gas from the first inlet to the junction and preventing reverse flow;
pipe means for connecting the ambient room space to the second inlet;
a second one-way valve at the second inlet permitting flow of gas from the second inlet to the junction and preventing reverse flow; and pipe means for connecting the outlet to the ambient atmosphere outside the ambient room space.
2. A valve system as claimed in claim 1, wherein each one-way valve comprises a flexible diaphragm which is urged into and out of contact with a rigid diaphragm support for respectively closing and opening of the valve by pressure and flow of gas in the respective direction.
3. Vent valve means for the venting to the atmosphere outside a room space of anesthesia apparatus within the room space comprising:
a valve body having a first inlet for connection thereto of pipe means from the anesthesia apparatus, a second inlet for the connection therein of pipe means from the said room space, and an outlet for the connection thereto of pipe means to the said atmosphere, all meeting at a junction within the body;
a first one-way valve at the first inlet permitting flow of gas from the first inlet to the junction and preventing reverse flow; and a second one-way valve at the second inlet permitting flow of gas from the second inlet to the junction and preventing reverse flow.
a valve body having a first inlet for connection thereto of pipe means from the anesthesia apparatus, a second inlet for the connection therein of pipe means from the said room space, and an outlet for the connection thereto of pipe means to the said atmosphere, all meeting at a junction within the body;
a first one-way valve at the first inlet permitting flow of gas from the first inlet to the junction and preventing reverse flow; and a second one-way valve at the second inlet permitting flow of gas from the second inlet to the junction and preventing reverse flow.
4. Vent valve means as claimed in claim 3, wherein each one-way valve means comprises a rigid diaphragm support and a flexible diaphragm which is urged into and out of contact with the support for respectively closing and opening of the valve by pressure and flow of gas in the respective direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000433091A CA1210304A (en) | 1983-07-25 | 1983-07-25 | Valve system for venting anesthesia or analgesia apparatus and the like and valves therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000433091A CA1210304A (en) | 1983-07-25 | 1983-07-25 | Valve system for venting anesthesia or analgesia apparatus and the like and valves therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1210304A true CA1210304A (en) | 1986-08-26 |
Family
ID=4125737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000433091A Expired CA1210304A (en) | 1983-07-25 | 1983-07-25 | Valve system for venting anesthesia or analgesia apparatus and the like and valves therefor |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1210304A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991000117A1 (en) * | 1989-07-05 | 1991-01-10 | Fisons Plc | Aerosol holding chamber |
-
1983
- 1983-07-25 CA CA000433091A patent/CA1210304A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991000117A1 (en) * | 1989-07-05 | 1991-01-10 | Fisons Plc | Aerosol holding chamber |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |