DE4007361A1 - Emergency respirator with disposable cartridge - incorporates closed hose containing oxygen under pressure and joined to bellows - Google Patents

Abstract

The emergency respirator has a unit dispensing oxygen, or a mixture of oxygen and air via a hose to a face mask. The oxygen is dispensed by a disposable gas cartridge (1) containing a closed hose system filled with the oxygen under pressure. A bellows (34) for artificial respiration or the supply of an oxygen and air mixture is secured to the cartridge so as to form a sealed joint.

Description

The invention relates to an emergency ventilator for ventilation Oxygen or an oxygen-air mixture according to the generic term of Claim 1.

As a rule, such emergency ventilation devices are concerned unwieldy, bulky and relatively expensive devices. The Oxygen is usually generated from a pressure reducer Oxygen bottle removed and either in medically pure form or via an air mixer of the face mask for ventilation of the emergency Fed to patients.

The disadvantage of the known emergency ventilation devices is that they are difficult are portable, relatively expensive to maintain and the rest only can be operated by experts because z. B. incorrect settings dangerous operating conditions can occur.

The invention is therefore based on the object Emergency ventilator of the type mentioned in such a way that it is easy and reliable to use even by laypeople, easy is portable and is inexpensive to manufacture.

To achieve the object, the invention is based on the technical Teaching of claim 1 characterized.

An essential feature of the present invention is that now according to the invention no longer an oxygen bottle with it  connected pressure reducer is used, but that instead a single-use gas cartridge can be used with a fixed predetermined gas volume is filled, which gas volume by special Training of the gas cartridge controlled over a certain period of time opening the gas cartridge into the face mask.

In a development of the present invention it is provided that the gas cartridge is connected to a bellows for forced ventilation, with the intermittently under pressure the outflowing oxygen gas in the Face mask can be initiated and with which it is also possible is to create an air-oxygen mixture that also forces (corresponding to the bellows actuation) can be fed to the face mask.

The protection of the present invention is not only related to the use of the ventilator according to the invention for emergencies, but the intended use also refers to a therapy on Patients without an emergency.

The function of the gas cartridge is described in more detail below: After such an oxygen cartridge is preferred for medical Emergencies but is also used for therapeutic applications preferred if the outflow of oxygen begins at about 6 liters / minute takes place, this amount changing over the course of the operating time reduced to about 3 liters / minute.

The dimensioning of the pipe coil system is such that a Filling for about 20 minutes with the above mentioned outflow conditions enough.

It is important that the coil system is refillable. It will  but avoided a filling valve recognized as disadvantageous and instead The refilling takes place in the factory by the tightness of the Pipe coil system interrupted at a corresponding extension pipe is and over this attachment pipe under high pressure (and if necessary low temperatures) the oxygen in the coil system is pressed.

Such a pipe coil system then preferably has a socket of about 45 liters of medically pure oxygen.

To meet the above capacities and outflow conditions Reaching the oxygen cartridge is preferred if that closed pipe coil system made of multiple layers parallel to each other coiled coils, in the course of which there are several Outflow pipe connecting coils with a small Cross-section is arranged, which discharge pipe in the area of the Housing arranged opener is interruptible.

So there is a very simple removal of the oxygen from the closed coil system in that in the area of the housing a mechanical opener is arranged, the tightness of a Outflow pipe interrupts. The outflow pipe bridges several Pipe coils of the pipe coil system (is therefore designed as a shunt) and when it is opened, the oxygen flows out of the exhaust pipe in a defined time. The cross section of the outflow pipe is namely chosen so low that the above-mentioned outflow conditions times and times can be achieved.

Here, the housing is designed so that it is ensured that the Oxygen gas escaping from the outlet pipe in a central Recess of the housing is taken, with this central recess  sealingly either a ventilation bellows can be screwed in or at screwed-in ventilation bellows becomes a connecting hose inserted, which is connected to a face mask so that the outflowing oxygen is detected and collected in the ventilation bellows and via the connection hose connected close to the ventilation bellows is introduced into the face mask for emergency ventilation.

This is a preferred embodiment, wherein it goes without saying that the oxygen flowing into the housing can be taken in other ways.

For technical purposes, it is therefore intended to be in the central Recess of the housing a corresponding connection hose tight screw in with an appropriate removal device for Delivery of oxygen for technical purposes (soldering, welding and the like) suitable is.

It is important in all embodiments that the oxygen cartridge takes up relatively little space (housing diameter approx. 140 mm a housing height of 60 mm) and that the coil system is refillable.

It was stated above that for the release of the oxygen Tightness of an outflow pipe by an arranged in the housing mechanically operated break contact can be interrupted.

In this application, the oxygen flows out of the Outflow pipe until the entire coil system is emptied. A such use means a single use of the Oxygen cartridge according to the invention, which is unique after this Can be refilled again.  

Such oxygen cartridges can be stored and stored practically indefinitely can be used immediately in an emergency.

In a second embodiment of the present invention provided that the tightness of the outflow pipe is interrupted in a controlled manner can be. Here is a valve tap in the area of the outflow pipe arranged that opened by mechanical actuation and again can be closed. In this way it is possible to get the oxygen to deliver in a controlled manner and also to return a delivery that has been initiated interrupt.

The subject matter of the present invention does not arise only from the subject of the individual claims, but also from the combination of the individual claims.

All in the documentation - including the summary - Disclosed information and features, especially those in the drawings Spatial training shown are essential to the invention claimed, insofar as they stand alone or in combination with the stand of technology are new.

In the following, the invention is based on only one Execution path illustrating drawings explained in more detail. Go here from the drawings and their description further essential to the invention Features and advantages of the invention.

Show it:

Fig. 1 shows schematically in side view the use of an emergency ventilator according to the invention on the patient;

Fig. 2 shows a section through the emergency ventilator, omitting the face mask shown in Fig. 1.

The emergency ventilation device or the therapy ventilation device essentially consists of a gas cartridge 1 , which is connected via an adapter 31 to a bellows 34 , the bellows of which is tightly connected in its upper, distal end to a mask 35 , in the interior of which a hose 39 can be connected , which in turn is tightly connected to a face mask 42 via a check valve 41 .

In the application shown in FIG. 1, the gas cartridge 1 is opened via an opener 5 to be described later, and oxygen gas flows into the bellows 34 at a defined outflow rate.

By pumping movements of the bellows, air is drawn into the interior 45 of the bellows 34 in the arrow direction 43 via the check valve 37 arranged in the mask 35 (see FIG. 2) and when the bellows is pressed down in the arrow direction 46 , this air-oxygen mixture, which is in the interior 45 was forced through the nozzle 40 in the mask 35 and the hose 39 connected there, introduced via the check valve 41 into the face mask 42 . The oxygen-air mixture released intermittently under pressure (corresponding to the bellows movement in arrow direction 46 and in the opposite direction to this) is pressed into the patient's airways.

The check valve 41 is intended to prevent breathing air from being returned to the bellows 34 via the hose 39 .

On the check valve 41 there are outflow bores which allow the breathing air to escape to the outside, but which are closed off in the case of the gas flowing out in the direction of the arrow 44 ( FIG. 2).

The function of the gas cartridge 1 is explained in more detail below: According to FIGS. 1 and 2, the gas cartridge 1 essentially consists of a circular, rotationally symmetrical housing 2 , which is preferably formed from a plastic material. The housing has a central, central recess 6 on its upper side and a base 3 opposite, in the central region of which an opener 5 is arranged.

In the housing 2 , the coil system 4 is arranged, which consists of a metal tube which is spirally wound in several layers. The beginning of the tube 19 and the end are closed accordingly, wherein, according to FIG. 2, one side of the tube 19 is connected to a filling tube which is soldered to the end of the tube end and which is mechanically closed via a notch after the filling process has taken place.

To refill the pipe coil system 4 , the filling pipe is cut off beyond the notch and the pipe coil system 4 is refilled with oxygen under pressure and, if appropriate, temperatures. A notch is then made again to trap the oxygen in the coil system under high pressure.

Beyond the central recess 6 in the housing 2 there is an annular chamber 7 running all around, in which the coil system 4 is arranged. This can be a two-layer (as shown in the drawing) or a three-layer pipe coil system 4 .

The housing 2 surrounds a base 3 with a collar 12 , which is essentially designed as a disc and has a central, central recess 13 . A bore 14 is made in the recess 13 in the bottom area, through which the opener 5 engages with a bolt 17 . The bolt 17 is connected to a disc 15 in the region of the recess 13 , the disc 15 carrying a handle 16 .

In the area of the free end of the bolt 17 , a slot 18 is provided, through which the outflow pipe 21 of the pipe coil system 4 runs.

The bolt 17 is held close to the recess 13 via an O-ring 29 , the slot 17 being able to be rotated by rotating the handle 16 such that the outflow pipe 21 breaks and the oxygen gas stored in the coil system 4 from the outflow pipe 21 escapes. It thus reaches the central recess 6 , in the wall area of which a thread 8 is arranged.

For better guidance of the housing 2 on the bottom 3 , the inner recess 6 has a bottom 9 which runs parallel to the bottom of the inner recess 13 , but is at a slight axial distance from the bottom of the recess 13 , in order to allow the outflow pipe 21 in this intermediate space to lead into the slot 18 of the bolt 17 .

The bolt 17 thus extends through an opening 10 in the bottom 9 of the recess 6 .

As already mentioned at the beginning, a connecting hose, a ventilation bellows or the like is screwed into the central recess 6 in order to supply the gas flowing out of the outflow pipe 21 to the emergency victim or the patient.

With regard to the coil system, it is only shown schematically that one end of the coil system 4 is connected to a connecting tube 20 which is secured to a tube 19 at its front free end via a soldering point to secure it in position.

The connecting pipe 20 is connected in a gas-conducting manner via a soldering point to the outflow pipe 21 , the outflow pipe 21 on its opposite side likewise being connected to the interior of the pipe 19 arranged there via a soldering point.

Referring to FIG. 2, further details of the arrangement can be seen.

The adapter 31 essentially consists of a screw attachment 32 which is applied axially to the bottom surface of the adapter and which is screwed tightly with its external thread into the associated internal thread 8 of the gas cartridge 1 .

The oxygen gas formed by the gas cartridge 1 can thus reach the interior 45 of the bellows 34 via the bores 33 . The bellows was only shown schematically and essentially consists of a plastic bellows, which is tightly connected to the adapter 31 .

The bellows 34 is tightly connected at its upper end to the mask 35 , in the bottom surface of which the check valve 37 is arranged. The check valve 37 draws air in the arrow direction 43 from the outside into the interior 45 of the bellows 34 when the bellows moves upward in the opposite direction to the arrow direction 46 .

In the face mask there is also a nozzle 40 on which the hose 39 can be attached. The air-oxygen mixture formed in the interior space 45 then flows out through the bore 38 into the tube 39, where it is accelerated in accordance with the bellows movements in the direction of arrow 44 is pumped into the tube 39 and corresponding to Fig. 1 via the check valve 41 into the face mask 42 passed .

For ventilation with pure oxygen, the tube 39 is removed and the face of the person to be ventilated is pressed tightly directly onto the cushion 36 of the mask 35 , so that the airways protrude into the mask 35 . Pure oxygen can now be breathed from the interior 45 of the bellows 34 .

Here, too, it is possible, by moving the bellows in the direction of arrow 46 and in the opposite direction, to generate an oxygen-air mixture via the check valve 37 , which is taken up by the patient's airways placed directly on the mask 35 .

Drawing legend

1 gas cartridge
2 housings
3 floor
4 pipe coil system
5 NC contacts
6 recess
7 chamber
8 threads
9 floor
10 breakthrough
11 outer wall
12 collars
13 recess
14 hole
15 disc
16 handle
17 bolts
18 slot
19 pipe
20 connecting pipe
21 exhaust pipe
24 solder joint
25 solder joint
29 O-ring
31 adapters
32 screw attachment
33 hole
34 bellows
35 mask
36 cushions
37 check valve
38 hole
39 hose
40 sockets
41 check valve
42 face mask
43 arrow direction
44 arrow direction
45 interior
46 arrow direction

Claims (5)

1. emergency respirator for ventilation with oxygen or an oxygen-air mixture by means of a device which emits the oxygen gas or mixture and a connecting tube and a face mask, characterized in that the device for dispensing the oxygen consists of a single-use gas cartridge ( 1 ), which has a self-contained pipe coil system ( 4 ) filled with the oxygen under pressure, that a bellows ( 34 ) for forced ventilation or for producing an air-oxygen mixture can be tightly connected to the gas cartridge. 2. Emergency ventilation device according to claim 1, characterized in that the bellows ( 34 ) via an adapter ( 31 ) on the gas cartridge ( 1 ) can be screwed on and that a mask ( 35 ) is arranged at its upper, distal end. 3. Emergency ventilation device according to claim 2, characterized in that in the mask ( 35 ) a bore ( 38 ) is arranged for the direct supply of oxygen in the respiratory tract. 4. Emergency ventilation device according to claim 2 or 3, characterized in that a check valve ( 37 ) is additionally arranged in the mask ( 35 ), which introduces air from the outside into the interior of the bellows ( 34 ). 5. Emergency ventilation device according to one of claims 1 to 4, characterized in that in the mask ( 35 ) a nozzle ( 40 ) for connecting a hose ( 39 ) is arranged, which is connected via a check valve ( 37 ) to a face mask ( 42 ) is.