DE2458017A1 - VALVE FOR BREATHING DEVICES - Google Patents

Description

Applicant ϊ

VEB Kombinat Medical and Laboratory Technology Leipzig 7035 Leipzig

Franz-Ilemming-Strasse 4-3-45

Valve for breathing apparatus

The invention relates to a valve designed for breathing apparatus, which has a valve housing with three paths, one of which leads into the atmosphere and the other two each end at a connection, one of which leads to the pressurized gas source, while the patient is connected to the other the valve housing has a leaflet-shaped, elastically designed valve body ₀

Valves of this type must be designed so that they through a plurality of operating states, such as one Insufflation, ventilation or finally spontaneous breathing allow the compressed gas supply to the. Patient is interrupted.

A valve is already known in which there is an elastic valve between the compressed gas connection and the atmosphere connection Valve body is arranged. This is provided with side openings designed as a lip valve, which in the case of the spontaneous Inspiration or during insufflation as a result of the air or gas flow created. Simultaneously causes

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this flow causes the valve body to bulge forward »which closes the path to the atmosphere and clears the path via the patient connection» When inspiration or insufflation is over, the lip valves close immediately and the expiratory air pressure returns the valve body to its starting position ₀

In addition, the atmosphere connection in the outlet is cut with a second, similarly designed valve body which closes as soon as expiration ceases penetration of air via this path into the valve and to the Patients are prevented »This valve body remains closed even if the breathing gas flow is due to inspiration is intensified. If, on the other hand, excess breathing gas escapes from the compressed gas source, this causes access to the Atmosphere the weak gas flow open the lip valves of both valve bodies (slip) *

Generally, the valve has a non-rebreathing valve features, but does not optimally limit or prevent breathing in exhaled air the loss of parts of the breathing air during inspiration of the exhaled air, which after the end of an expiration between the two valve bodies remains. However, this can also lead to an inaccuracy of the representative parameter for the ventilation during the inspiratory control, since the rebreathed Part of exhaled air from the volume measuring device

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is not detected. This deficiency symptom - is both in the Ventilation "as well as" cumulatively effective for spontaneous breathing.

The purpose of the invention is to provide a proportionate simply set up 'valve for respiratory equipment that works more reliably, easily dismantled and better is sterilized and can be manufactured more cost-effectively

The invention has for its object to avoid the disadvantages of the known embodiments and a valve for To create respiratory devices with only one valve body, both for spontaneous inspiration or for insufflation as well as safe ventilation or spontaneous breathing during expiration enables · In addition, should be constructive. Aimed at interchangeability of the inspiration and expiration ports and thus their assembly can be improved · Finally, to avoid back-breathing, a double back-breathing function is required strive to prevent seepage air from the atmosphere at the same time,

According to the invention, the object is achieved in that the for Pressurized gas sources and paths leading into the atmosphere are formed by means of axially arranged inspiration and expiration ports, which have radially extending openings, vwhich from the outside 'and / or inside of a special membrane fixed between them are enclosed in the rhythm of inspiration and expiration. The advantages of such a valve are based on the fact that by the dead space reduced to a minimum, that after completion Breathing gas to be exhaled for inspiration, maximum of the atmosphere

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supplied or because of the OOg content in the breathing gas to be exhaled the patient breathes back as little as possible · apart from the improved volume measurement of the actually ventilated breathing gas, a smaller design of the valve is achieved and at the same time the complexity and the number of valve bodies used up to now reduced *

The Spezialmem.bran preferably has a shape similar to a finger cot, whereby the part closing the openings in the expiratory port, together with a downstream, second valve body, can bring about a double rebreathing function. It is also expedient to pull the special membrane over the openings in the inspiration connector with a slight bias and to fix it between it and the expiration connector. Furthermore, the expiratory and inspiratory ports can have the same design and they can be connected to the special membrane and the patient connection by means of a bracket for quick disassembly without tools is to arrange the Patientenaaechluß between these _f whereby a circumferential chamber formed * as far as the inventive valve is designed for a double non-return function, the second "Vemtilkörper used may be provided with a supporting studs formed as valve leaflets, and, the latter being fastened in the center of the passage opening and is releasably connected to a strut bridging this opening. Taking advantage of be ~

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known options, it is still useful to connect the patient connection, preferably in its circumferential chamber wall, with a visual fender and / or the inspiration and expiration ports to provide an engagement device or these valve parts to ensure a visible function check made of transparent material «An escape of breathing gas at the connection points is ensured by appropriate Prevents sealant.

The invention is intended below using an exemplary embodiment to be explained in more detail «

In the accompanying drawing show:

Fig. 1 shows a valve for breathing apparatus in a schematic representation and

Fig. 2 the membrane positions during inspiration and ezspiration with the course of the respective respiratory gas flow _β

Compartment Fig. 1, the valve consists of a base body 1, into which an inspiratory nozzle 2 and an expiratory nozzle are inserted to a limited extent. Its parts arranged in the interior of the housing have radially extending openings 4 and 5, which are closed in the rhythm of inspiration and expiration on the inlet side from the outside and on the outlet side from the inside by a special membrane. This has a shape similar to a finger cot and half of it is pulled over the openings 3 onto the inspiratory nozzle 2 with a slight bias. The other half of the membrane is located inside the expiration port

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and runs with its closed end over the openings 4 away in an outward direction »The one between the In- and expiration ports 2 and 3 existing gap is dimensioned so that when the valve is installed the Spezialmenibran 6 is fixed.

To achieve a double rebreathing function, a leaflet-shaped valve body 71 is located on the connection side in the expiratory port 3, which is detachably connected by means of retaining knobs in the center of the passage opening 12 to a strut 13 bridging this opening, which is structurally fixed in terms of its dimensions and the expiratory port 3, which is structurally identical together with the Spezialm.em.bran 6, suitable sealing means 14 and the base body 1 designed as a patient connection 9 mounted in such a way that a bracket 8 adequately secures the connection The inspiration and expiration ports 2 and 3 inserted into it and form a circumferential chamber 10 ₀ with these and form the base body 1 and the inspiration ports as well as the expiration ports 3 to ensure a visible functional check transparent material »

Is from a gas source, such as "B ₀ a wall fitting, a ventilator or a breathing bag launched an air or gas flow through a path to inspiration piece 2, which is also in the spontaneous inspiration or insufflation the case, be due to the up building pressure in

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of the special membrane 6 first the openings 4- in the expiratory port 3 closed and immediately afterwards the openings 5 released in the inspiration nozzle 2. The breathing gas takes a path shown according to FIG. 2 and is via the chamber 10 and the patient connection 9 led to the patient.

The one at the end of the inspiration * or insufflation phase. The associated pressure drop in the inspiration port 2 first causes the openings 5 to close in the opposite direction and immediately thereafter a release of the openings 4, so that the expiratory air escaping through this pushes the valve body into an open position and reaches the open air. The course of the flow takes place in the manner shown in FIG

The valve body 7 arranged in the expiratory port 3 is used exclusively the aspired double rebreathing function · Even without this, the function of the valve according to the invention is fully guaranteed for breathing apparatus.

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Claims (7)

Patent claims: Valve for breathing apparatus that has a valve body with three Has paths, one of which leads into the atmosphere and the other "both of which end at a connection each, whose one leads to the pressurized gas source, while at the other the patient is connected, the valve housing having a leaflet-shaped, elastically designed valve body "Has, characterized in that the pressurized gas source and paths leading into the atmosphere by means of axially arranged inspiration and expiration ports (2 and 3) are formed, which have radially extending openings (4 and 5), which from the outside and / or inside of a between them fixed special membrane (6) in the rhythm of the In- and inspiration are enclosed, 2. Valve for breathing apparatus according to claim 1, characterized. marked, that the special membrane (6) has a shape similar to a finger cot, which closes the openings (4) Part in connection with one in the expiratory port (2) arranged valve body (7) a double non-rebreathing function causes. 3. Valve for breathing apparatus according to claim 1 and 2, characterized characterized in that the special membrane (6) with lighter Pre-tension via the openings (5) on the inspiration nozzle (3) pulled and between these and the expiratory port (2) is fixed. 509828/0502 "* * 4-, valve for Atinungsgerate according to claim 1 "to 3» thereby characterized in that the expiratory nozzle (2) and the Inspiratory connection (3) has an identical design have and these nozzles (2 and 3) together with the Spe cell membrane (6) "and the patient connection (9) are axially connected by means of a retaining bracket (8). 5. valve for breathing apparatus according to claim 1 to 4, characterized characterized in that the patient connection (9) between The inspiration and expiration ports (2 and 3) are arranged, whose distance and axial position are determined and a circumferential chamber (10) formed with them 6. valve for breathing apparatus according to claim 1 to 5, characterized characterized in that the valve body (7) designed as a valve leaflet is provided with a holding knob (11), which is detachably connected in the center of the passage opening (12) to a strut (13) bridging this opening, 7. Valve for breathing apparatus according to claim 1 to 6, characterized in that the patient connection (9) niit one Window is provided or the patient connection (9) and / or the inspiration and expiration ports (2 and 3) known to ensure a visible functional check Has viewing devices or consist of transparent material. 509 828/0502