DD159396A1 - Valve for breathing devices - Google Patents

Valve for breathing devices Download PDF

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Publication number
DD159396A1
DD159396A1 DD23057781A DD23057781A DD159396A1 DD 159396 A1 DD159396 A1 DD 159396A1 DD 23057781 A DD23057781 A DD 23057781A DD 23057781 A DD23057781 A DD 23057781A DD 159396 A1 DD159396 A1 DD 159396A1
Authority
DD
German Democratic Republic
Prior art keywords
valve
sealing
expiratory
inspiratory
crater
Prior art date
Application number
DD23057781A
Other languages
German (de)
Inventor
Peter Hobe
Achim Klose
Werner Schiller
Original Assignee
Peter Hobe
Achim Klose
Werner Schiller
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Peter Hobe, Achim Klose, Werner Schiller filed Critical Peter Hobe
Priority to DD23057781A priority Critical patent/DD159396A1/en
Publication of DD159396A1 publication Critical patent/DD159396A1/en

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Abstract

The invention relates to a set up for artificial breathing circuit valve having a Ventilgehaeuse with three paths, one of which leads into the atmosphere and the other two ends in each case a connection, one of which leads to the compressed gas source, while at the other the patient is connected, wherein the valve housing exspirationsseitig has a blaettchenfoermig designed valve body. Through a combination of an inspiratory valve, expiratory valve and diverter valve, an arrangement of their sealing craters on a flow axis and in a plane and a pressure equalizer in the switching part a stable and sudden Ventilbetaetigung is achieved.

Description

Valve for respiratory equipment

Field of application of the invention:

The invention relates to a set up for breathing apparatus valve having a valve housing with three paths, one of which leads to the atmosphere and the other two terminate in each case a terminal, one of which leads to the compressed gas source, while at the other the patient is connected the valve housing exspirationsseitig has a leaf-shaped valve body,

Valves of this type must be designed to allow for a variety of operating conditions, such as insufflation, automatic respiration, or, finally, spontaneous breathing, in which the pressurized gas supply to the patient is disrupted.

Characteristic of the known technical solutions:

It is already known a valve in which an elastic valve body is arranged between the compressed gas connection and the AtMoSphärenanschluß (DE-PS 1 491 74o), This valve

The body is provided with lateral openings designed as a lip valve, which are opened during spontaneous inspiration or during insufflation as a result of the resulting flow of air or gas. At the same time, this flow causes the valve body to bulge forward, closing the path to the atmosphere and clearing the path through the patient port. When inspiration or insufflation is complete, the lip valves close instantaneously and the expiratory air pressure returns the valve body to its initial position. In addition, the atmosphere connection in the outlet nozzle is provided with a second identically designed valve body, which closes as soon as expiration ceases. This is to prevent ingress of air via this path into the valve and the patient * This valve body remains closed when inspiratory, the respiratory gas flow is intensified. Escaping on the other hand, excess breathing gas from the compressed gas source, so with still free access to the atmosphere causes the weak Gas flow opens the lip valves of both valve bodies (slippage) ·

In general, the valve has the characteristics placed on a non-rebreathing valve, but does not optimally limit the rebreathing of exhaled air and also does not prevent the loss of breath portions during inspiration. Thus, spontaneous inspiration becomes part of the total volume of exhaled air breathed back, which remains after completion of expiration between the two valve bodies. From this, however, an inaccuracy of the representative size for the ventilation in the inspiratory control can be derived, since the rebreathed part of exhaled air is not detected by the volume measuring device. This deficiency syndrome is cumulative in both ventilation and spontaneous breathing.

Pernerhin is a non-rebreathing valve, which is preferably used with bellows pumps (AMBU Report No. 3, 2nd ed. O4 / 58). Its valve body is designed plate-shaped and closes by spring force the opening to the bellows. The air forced into the valve body by the bellows pump during inspiration moves the valve disc against the exhalation port to shut it off. If the bellows expands again, the resulting negative pressure in combination with the force of the spring in the non-rebreathing valve ensures that the valve disc releases the exhalation and returns to its closed position on the bellows.

This valve design does not meet all the requirements of the practice, because the connection of the inlet opening with the patient port and the simultaneous closure of the exhalation sÖffnung takes place only after overcoming the spring force. But it is absolutely necessary that the resistance of the valve body in the air flow, so the resistance to the flow of air or gas in the valve is very low . However, there are also other types of valves, which in themselves have the construction of a three-valve and include in the valve housing an inlet conduit in communication with a source of breathing gas, an outlet conduit in open communication with the atmosphere and a third conduit in communication with the patient (US-PS 3,669 Io9, US Pat. No. 3,515,163, FR-PS No. 1 608). These valves sometimes have a relatively complicated overall arrangement and are therefore easily prone to failure. On the other hand, elastic Ventileleraente are provided that do not meet all the requirements of the practice, in particular not solve the technical problem with respect to perfectly automatic switching. Finally, a respirator for the domestic sector has become known, the suction port is connected to a gas source and its pressure port via a humidification device with an exhalation valve. (DE-OS 2 635 532)

This simply constructed valve has a valve element loosely disposed between two differently sized diameter sealing ridges which, during the exhalation phase, sealingly engages and seals the larger sealing ridge of the inlet conduit. It therefore acts as a check valve and prevents the ingress of exhaled air into the inlet pipe. During the ventilation phase, the valve element is pressed against the smaller sealing ridge or the opening of the outlet conduit and closes it completely. Also in this puncture during the inhalation phase, the exhalation valve is functionally the same as the above mentioned ventilation valve. However, his main disadvantage is also in him once in the rebreathing of a significant proportion of exhaled air and on the other hand in the loss of breathing air at the beginning of the inhalation phase. In addition, a labile seal of the outlet conduit is to be noted that its outlet designed as a sealing crater provides too little support for the valve member and a sudden reversal of the valve member into the stable expiratory position is not ensured because the change in pressure forces occurring with the respiratory phase change let the valve element the required differential pressure does not arise.

Object of the invention:

The object of the invention is to provide a simple non-rebreathing valve that is simple in construction, which avoids the disadvantages of known valve types and ensures perfect puncture during spontaneous respiration or automatic respiration.

Explanation of the essence of the invention:

The object of the invention is to develop an Eficht rebreathing valve with a combined valve arrangement which effects a stable and sudden changeover of the valve body at the time of the respective respiratory phase change.

- 5 -

The object is achieved according to the invention by the combination of an inspiratory valve and an expiratory valve with a switching valve whose sealing craters are arranged on a same flow axis and closed depending on the respective respiratory phase of only one valve disc, by the arrangement of the sealing craters of the expiratory valve and the Change-over valve in a plane whose one smaller sealing crater and whose other sealing crater is larger than the sealing crater of the inspiratory valve and by a pressure equalization channel which connects the switching valve to the patient connection in the closed position of the iixspirationsventils

A preferred embodiment of the present invention not re-rebreathing valve is that the valve housing is divided by a partition into an inspiratory chamber and an expiratory chamber, which are interconnected via an expiratory nozzle, its inlet side as a sealing crater for the expiratory valve and the outlet side as a sealing crater for a in the expiratory chamber arranged check valve are formed.

Embodiment:

An embodiment of the invention will be explained in more detail below with reference to a schematic drawing which shows the illustration of the present invention essentially a non-rebreathing valve, whose designated by the reference numeral 1 valve housing a compressed gas port 2, an atmosphere port 3 and a

The valve housing 1 is subdivided by means of a dividing wall 5 into an inspiratory chamber 6 and an expiration chamber 7 which are connected to each other via an expiratory nozzle 8. In the inspiratory chamber 6 there is a switching valve 11 combined with an inspiratory valve 9 and an expiratory valve 10. whose sealing craters 12, 13 and 14 are arranged on a same flow axis 15 and are closed by only one valve disc 16 as a function of the respective adjacent respiratory phase. The sealing crater 13 of the expiration valve 10 and the sealing crater 14 of the reversing valve 11 is in one plane. In addition, the sealing crater 13 is smaller and the sealing crater 14 is larger than the sealing crater 12 of the inspiratory valve 9. If the valve disc 16 rests on the sealing craters 13, 14, arises through this and in conjunction with the expiratory nozzle 8 and the partition wall 5 an annular chamber 17 · This is connected via a pressure equalization channel 18 with the patient port 4, even if the switching valve 11 is in the closed position ·

The expiratory nozzle 8 connecting the inspiratory chamber 6 to the expiration chamber is formed on the one side as a sealing crater 13 for the expiratory valve 10 and on the other side as a sealing crater 19 for a non-return valve 20 arranged in the expiration chamber 7. This is provided with a leaf-shaped valve body 21. The connection of the non-rebreathing valve to the ventilator (not shown) is effected by a connection via the compressed gas connection 2 with the inspiration valve 9, which is closed by the valve disc 16 during the expiration phase. The expiratory valve 10,

which has access to the atmosphere via the expiration chamber 7 and the change-over valve 11, which has a connection to the patient connection 4 via the pressure equalization channel 18, is closed by the valve disc 16 during the inspiration phase.

Now, in principle for the problem to be solved, it can be assumed that the end of the inspiratory phase in automatic ventilation is always associated with a rapid pressure drop and spontaneous respiration always with a sudden increase in pressure. The effect of these effects is the same, the air flow direction with respect to the patient is reversed, and vice versa, the resultant of the force acting on the valve disc 16 compressive forces · The valve disc 16 thus changes from the stable inspiratory position in the stable expiratory position over

The switching valve 11 has to perform at the transition from the inspiration phase in the expiratory phase, a divider function between the dormant and the back-flowing breathing gas. The switching is effected in the case of automatic ventilation and spontaneous respiration by the increasing pressure gradient between the compressed gas connection 2 and the patient connection 4. The rebreathing via the expiration valve is prevented during spontaneous respiration by the check valve 20. The non-rebreathing valve shown in the figure shows a simple Structure that allows efficient production · The inspiratory valve 9 and the expiratory valve 10 are closed alternately by means of valve disc 16. In the inspiratory phase, the pressure conditions P T P. P TT P _ =

P Athm. = ° is marked with ° P A P I lies

the valve disk 16 on the sealing crater 13 of the expiration valve 10 and at the same time on the sealing crater 14 of the switching valve 11.

The end of the inspiratory phase is achieved when the breathing-pressure reaches its maximum value, that is, Рд s P u = s Pj P e = 0. The following quick drop of the ventilation pressure Pj at 0 causes the lifting of the valve disc 16 by the expiratory valve, because then Рд = Py Pj = Pg = 0. The pressure equalization P 1 to P j is delayed by the throttling effect of the pressure equalization channel 18. In the subsequent expiratory phase, which is characterized by the pressure ratios ρ D = P q P g P P j = о, the inspiration valve 9 is closed. At the end of the expiration phase, the inspiratory chamber 6 prevails general pressure equality, because 11 A = 11 U = 11 B = 11 I = ° -

The following incipient phase of inspiration is characterized by a sudden increase in pressure Pj 0 during automatic ventilation and by a sudden drop in pressure Рд 0 during spontaneous breathing. The check valve 20 prevents expiration-side back breathing. The onset of respiratory gas thus causes the switching of the Yentilscheibe 16th

Claims (1)

  1. Invention claim:
    1 · Valve for respiratory equipment, which has a valve housing with three paths, one of which leads to the atmosphere and the other two each end to a terminal, one of which leads to the compressed gas source, while the patient is connected to the other, the valve housing exspirationsseitig a valve-shaped valve body, characterized by the combination of an inspiratory valve (9) and an expiratory valve (10) with a switching valve (11) whose sealing craters (12, 13 | 14) arranged on a same flow axis (15) and in dependence on the adjoining respiratory phase of only one valve disc (16) are closed by the arrangement of the sealing craters (13, 14) of the exhalation valve (10) and the switching valve (11) in a plane whose one Dichtkrater (13) smaller and whose other Dichtkrater (14 ) is greater than the sealing crater (12) of the inspiratory valve (9) and by a pressure equalization channel (18) in Closing position of the exhalation valve (10) pneumatically connects the changeover valve (11) to the patient connection (4).
    Valve for breathing apparatus according to item 1, characterized in that the valve housing (1) is subdivided by means of a dividing wall (5) into an inspiratory chamber (6) and an expiration chamber (7) which communicate with each other via an expiratory nozzle (8)
    - 10 -
    are connected, the inlet side of which as a sealing crater (13) for the expiratory valve (10) and the outlet side as a sealing crater (19) for a in the Exspirationskamoier (7) arranged check valve (20) are formed
    For this 1 page drawing
DD23057781A 1981-06-04 1981-06-04 Valve for breathing devices DD159396A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DD23057781A DD159396A1 (en) 1981-06-04 1981-06-04 Valve for breathing devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD23057781A DD159396A1 (en) 1981-06-04 1981-06-04 Valve for breathing devices

Publications (1)

Publication Number Publication Date
DD159396A1 true DD159396A1 (en) 1983-03-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
DD23057781A DD159396A1 (en) 1981-06-04 1981-06-04 Valve for breathing devices

Country Status (1)

Country Link
DD (1) DD159396A1 (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6112746A (en) 1996-07-26 2000-09-05 Resmed Limited Nasal mask and mask cushion therefor
US6123071A (en) 1993-06-18 2000-09-26 Resmed Limited Facial masks for assisted respiration or CPAP
US6123082A (en) 1996-12-18 2000-09-26 Resmed Limited Device for preventing or reducing the passage of air through the mouth
US7942150B2 (en) 2004-04-09 2011-05-17 Resmed Limited Nasal assembly
US8517023B2 (en) 2007-01-30 2013-08-27 Resmed Limited Mask system with interchangeable headgear connectors
US9662467B2 (en) 2000-10-19 2017-05-30 Resmed R&D Germany Gmbh Breathing mask for feeding a breathing gas to a mask user and discharge device for discharging breathing gas
US9757534B2 (en) 2001-10-22 2017-09-12 Resmed R&D Germany Gmbh Breathing mask arrangement as well as an application device and a forehead support device for same
US9757533B2 (en) 2008-03-04 2017-09-12 Resmed Limited Mask system with snap-fit shroud
US9770571B2 (en) 1996-10-16 2017-09-26 Resmed Limited Vent valve assembly
US9802021B2 (en) 2002-12-06 2017-10-31 Fisher & Paykel Healthcare Limited Mouthpiece
US9895503B2 (en) 2003-05-02 2018-02-20 Resmed Limited Mask system
US9962510B2 (en) 2005-10-25 2018-05-08 Resmed Limited Respiratory mask assembly
US10058671B2 (en) 2001-10-22 2018-08-28 Resmed R&D Germany Gmbh Application device for a breathing mask arrangement
US10137270B2 (en) 2005-10-14 2018-11-27 Resmed Limited Cushion to frame assembly mechanism

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6123071A (en) 1993-06-18 2000-09-26 Resmed Limited Facial masks for assisted respiration or CPAP
US6112746A (en) 1996-07-26 2000-09-05 Resmed Limited Nasal mask and mask cushion therefor
US9770571B2 (en) 1996-10-16 2017-09-26 Resmed Limited Vent valve assembly
US6123082A (en) 1996-12-18 2000-09-26 Resmed Limited Device for preventing or reducing the passage of air through the mouth
US9662467B2 (en) 2000-10-19 2017-05-30 Resmed R&D Germany Gmbh Breathing mask for feeding a breathing gas to a mask user and discharge device for discharging breathing gas
US10058671B2 (en) 2001-10-22 2018-08-28 Resmed R&D Germany Gmbh Application device for a breathing mask arrangement
US9757534B2 (en) 2001-10-22 2017-09-12 Resmed R&D Germany Gmbh Breathing mask arrangement as well as an application device and a forehead support device for same
US9889266B2 (en) 2001-10-22 2018-02-13 Resmed R&D Germany Gmbh Breathing mask arrangement as well as an application device and a forehead support device for same
US10245403B2 (en) 2001-10-22 2019-04-02 RedMed R&D Germany GmbH Breathing mask arrangement as well as an application device and a forehead support device for same
US9802021B2 (en) 2002-12-06 2017-10-31 Fisher & Paykel Healthcare Limited Mouthpiece
US9956369B2 (en) 2002-12-06 2018-05-01 Fisher & Paykel Healthcare Limited Mouthpiece
US9895503B2 (en) 2003-05-02 2018-02-20 Resmed Limited Mask system
US7942150B2 (en) 2004-04-09 2011-05-17 Resmed Limited Nasal assembly
US9895505B2 (en) 2004-04-09 2018-02-20 Resmed Limited Nasal assembly
US10137270B2 (en) 2005-10-14 2018-11-27 Resmed Limited Cushion to frame assembly mechanism
US9962510B2 (en) 2005-10-25 2018-05-08 Resmed Limited Respiratory mask assembly
US10183138B2 (en) 2005-10-25 2019-01-22 Resmed Limited Interchangeable mask assembly
US9937315B2 (en) 2007-01-30 2018-04-10 Resmed Limited Mask with removable headgear connector
US8517023B2 (en) 2007-01-30 2013-08-27 Resmed Limited Mask system with interchangeable headgear connectors
US9950131B2 (en) 2008-03-04 2018-04-24 Resmed Limited Mask system with snap-fit shroud
US9962511B2 (en) 2008-03-04 2018-05-08 Resmed Limited Mask system with snap-fit shroud
US9757533B2 (en) 2008-03-04 2017-09-12 Resmed Limited Mask system with snap-fit shroud
US9770568B2 (en) 2008-03-04 2017-09-26 Resmed Limited Mask system with snap-fit shroud

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