DD239337A1 - Ventilation unit with universal valve combination for neonatology - Google Patents

Ventilation unit with universal valve combination for neonatology Download PDF

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Publication number
DD239337A1
DD239337A1 DD85278566A DD27856685A DD239337A1 DD 239337 A1 DD239337 A1 DD 239337A1 DD 85278566 A DD85278566 A DD 85278566A DD 27856685 A DD27856685 A DD 27856685A DD 239337 A1 DD239337 A1 DD 239337A1
Authority
DD
German Democratic Republic
Prior art keywords
valve
breathing gas
hose
ventilation
valve combination
Prior art date
Application number
DD85278566A
Other languages
German (de)
Inventor
Gerhard Gruner
Friedrich Weber
Original Assignee
Zittau Kreiskrankenhaus
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 Zittau Kreiskrankenhaus filed Critical Zittau Kreiskrankenhaus
Priority to DD85278566A priority Critical patent/DD239337A1/en
Publication of DD239337A1 publication Critical patent/DD239337A1/en

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/20Valves specially adapted to medical respiratory devices
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0051Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes with alarm devices
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/021Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes operated by electrical means
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/20Valves specially adapted to medical respiratory devices
    • A61M16/201Controlled valves
    • A61M16/202Controlled valves electrically actuated
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/20Valves specially adapted to medical respiratory devices
    • A61M16/208Non-controlled one-way valves, e.g. exhalation, check, pop-off non-rebreathing valves
    • A61M16/209Relief valves
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0096High frequency jet ventilation
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10Preparation of respiratory gases or vapours
    • A61M16/105Filters
    • A61M16/106Filters in a path
    • A61M16/107Filters in a path in the inspiratory path

Abstract

The invention relates to a ventilator with universal valve combination for neonatology. This electronically operating ventilator is used for the automatic and manual ventilation of baby and newborns. This created a ventilator that can perform all types of ventilation, including high frequency oscillation ventilation. The ventilator consists of a device connection between a universal valve combination (2) which can be placed near the patient (14) and regulates all ventilation modes (2) and an electronic control unit (1), respiratory gas source (10) and humidification (11) located outside the incubator (14) ). Fig. 1

Description

For this 2 pages drawings

Field of application of the invention

The invention relates to a medical device, in particular a ventilator with a universal valve combination, which is preferably suitable to automatically and manually ventilate premature babies and neonates in the neonatal primary care, the implementation of transports and consecutive inpatient treatment in the field of basic and specialized care ,

Such medical devices serve the purpose of providing respiratory assistance in the event of disrupted in-use and the stabilization of the self-breathing, ventilation frequency or rhythm, the inspiratory and expiratory ventilation pressure as well as the respiratory time ratio with adequate volume flow being controllable. The course of the ventilation pressure in the ventilated system is determined by its current (physiological or pathophysiological) properties as well as the parameters of the selected ventilation mode.

Characteristic of the known technical solutions

For this field of application, there are various ventilators (also called ventilators or respirators), which in terms of the course of their pressure, volume and flow curves, the type of tidal volume, the type of reversal in the following respiratory phase, the type of drive, the inspiration triggering Mechanism and the conditioning of the breathing gas differ.

Such devices have mechanical, pneumatic, electrical, electronic or combined drives.

The devices are designed in a compact design, d. h., The control, the control and the drive system as well as some facilities for heating and humidifying the breathing gas are housed in a device housing.

To control and regulate all important for the ventilation and largely variable parameters, a variety of valves (positive pressure, counterpressure, pulsator and other valves) and control devices are required, the accommodation of which leads to a considerable size of the equipment, which is disadvantageous in terms of space requirements for intensive care and transport mobility. In addition, the large number of components increases the susceptibility.

For early and newborn therapy mainly ventilators are used, which operate on the principle of a modified Areyschen tee. Ventilation takes the form of intermittent-positive-pressure-ventilation (IPPV), positive end-expiratory-pressure-ventilation (PEEPV) and high-frequency-positive-pressure-ventilation (HFPPV).

In these and other types of ventilation not mentioned here, the breathing gas flow coming from a respiratory gas source is led from the ventilator to the tracheal distribution head (Arey's T-piece) of the patient and back to the ventilator. For this purpose, relatively long hose lines between the ventilator and patients for the outward and return flow of the breathing gas are essential for compact equipment. Due to the length of the hose lines, disadvantages arise from the cooling and condensate formation of the humidified respiratory gas and the possible disturbances in the ventilator. In order to eliminate the condensation, it is necessary to install special patient hose heaters. Another disadvantage of the long hoses and the other present in compact equipment apparagen

Spaces is the large equipment dead space, which leads to a carry-over of the signals from the control part and makes the transmission of high-frequency aerodynamic processes, such as must be realized in the case of HFPPV ventilation, impossible. In order to achieve a high-frequency oscillation ventilation of the lungs with the known respirators, an HF generator and a hose line to the patient must be additionally installed, which further increases the already large expenditure on equipment.

In order to overcome some of the disadvantages mentioned, it has been attempted to miniaturize ventilators to such an extent that they can be placed "close to the patient" in the incubator.These solutions did not produce the desired results, since the devices are still too large, not at the medical In addition, such equipment must be adjusted and checked in the incubator, which encounters the greatest difficulties, at least in the transport incubator.

Finally, as a further disadvantage of compact equipment to mention that for sterilization, the entire device must be treated, which is possible only under certain, the availability of such devices restrictive conditions.

Object of the invention

The object of the invention, while avoiding the disadvantages mentioned, is to develop a medical device with which it is possible to perform all types of ventilation on patients, both during transport and in stationary form, such as in hospitals.

Explanation of the essence of the invention

The invention has for its object to fundamentally change the compact design of the ventilators and by creating a device connection, consisting of a universal valve combination with self-regulating constant pressure and a separate control part to reduce the equipment complexity and susceptibility to significantly reduce the space requirement, the mobility of the ventilator, to prevent condensate formation, to eliminate the large device dead space, to allow the RF oscillation ventilation without additional RF generator and to facilitate the sterilization of the ventilator.

Erfindemäß the object is achieved in that the electronic control part outside the incubator and the valve combination within the incubator in the immediate vicinity of the patient is arranged and connected by a signal line and Manometer hose line. The breathing gas source located outside of the incubator is connected to the air filter of the valve combination by means of a hose line via the heating and humidification with the respiratory gas inlet connection located in the incubator. The tracheal manifold head on the patient is connected to the valve combination by means of breathing gas supply and respiratory gas return line and the breathing gas outlet connection is flanged. The valve combination itself consists of a valve flow with Atemgasaustrittsschlauch on which there is a housing with a rotatable housing head and air filter. In the housing is a Gleichstromzugmagnet with solenoid valve whose seat is formed by a number of circularly mounted valve tubes, which are connected via annular channel, channel, air chamber with the hose nozzle and breathing gas return line arranged. On the housing head is the hose nozzle used for the manometer hose line connected to the annular channel and the dipole coupling serving for the signal line. The rotatable housing head contains a throttle and a pressure relief valve and on this a hose nozzle with breathing gas return, hose nozzle with breathing gas supply and nozzles with air filter and breathing gas inlet nozzle are arranged. The respiratory gas source and the heating and humidification are attached to the electronic control unit. The valve foot has a screw-adjustable, spring-loaded emergency breathing valve at its lower end.

The Trachealverteilerkopf has two hose nozzles, with one hose nozzle connected to the breathing gas supply and the other with the respiratory gas return line.

Furthermore, the Trachealverteilerkopf has a connector suitable for connection of the tracheal tube and a suitable for opening the tracheal tube in suction closure.

Exemplary embodiment

The invention will be described below with reference to exemplary embodiments. In the drawings show:

Fig. 1: the arrangement of a ventilator according to the invention in the ventilation system, shown schematically Fig. 2: an embodiment of the valve combination with the Trachealverteilerkopf

According to FIG. 1, the electronic control part 1 is placed outside and the valve combination 2 linked by the signal line 12 within the incubator 14, wherein the valve combination 2 is in the immediate vicinity of the patient 6. The outside of the incubator 14 located breathing gas source 10, which contains all the facilities required for adjusting the Atejngasvolumenstromes and O 2 concentration is connected by means of hose on the heating and humidification 11 with the breathing gas inlet nozzle 3 on the air filter 18 of the valve combination 2. The Trachealverteilerkopf 5 on the patient 6 is connected by means of breathing gas supply line 4 and breathing gas return line 7 to the valve combination 2. In the control part 1 is an unillustrated pressure gauge, which is connected via the manometer hose 13 to the valve combination 2. At the valve foot 16 of the valve combination 2, a breathing gas outlet nozzle 8 is attached, soften a Atemgasaustittsschlauch 9 can be plugged. The electronic control part 1, which is connectable to the local network or to the electrical system of vehicles, includes an unillustrated audible alarm device and a selector switch to

-3- Z39 337

Conversion of the ventilation modes. An accumulator, also not shown, serves to maintain the alarm function in the event of a power failure.

The ventilation frequency, the inspiratory pressure, the end-expiratory pressure, the respiratory time ratio and the high-frequency can be adjusted continuously in accordance with the required ventilation modes (IPPV, IPM, PEEPV and HFPPV) by means of conventional control and monitoring units present on the electronic control unit 1.

The corresponding output signals go via the signal line 12 to the valve combination 2 and are converted there into adequate aerodynamic processes. The valve combination 2 assumes the function of the expiratory valve (frequency pulsator), the inspiratory pressure limiter, the end-expiratory pressure limiter, the high-frequency modulator and the regulation of the respiratory time ratio in automatic and in manual (assistive) ventilation.

In addition, the valve combination 2 assumes the function of the inspiratory pressure limiter during manual emergency ventilation as a result of a power failure. Finally, self-regulation of the pressure consistency is carried out by the valve combination 2.

By means of the adjustable throttle 34 present in the valve combination 2, the system path from the respiratory gas source 10 to the valve combination 2 is kept under a dynamic pressure that is greater than the inspiratory pressure. Thereby, and by the short distance between the valve combination 2 and the patient 6, the relatively large device dead space in the ventilator according to the invention is reduced to a minimum, namely to the volume of the extremely short hose connections 4 and 7 in the case of the known ventilators. With this arrangement according to the invention and the extremely low-inertia operation of the solenoid valve 19 as described in the description of FIG. 2, it is possible to impart to the solenoid valve 19, apart from the control of the primary pressure curve of the normal ventilation frequency, the respiratory volume flow, an HF modulation which becomes effective for the oscillation ventilation without, as in the known ventilators to achieve a Oszillationsventilation, a separate RF generator and a pressure line to the patient to install.

The shortening of the tubing and the installation of the valve combination 2 in the incubator 14 also proves to be advantageous in that the formation of condensate is very significantly limited.

By means of the built-in valve foot 16 of the valve combination 2 spring-loaded adjustable emergency ventilation valve 39, the patient 6 can be manually ventilated in case of failure of the electronic control 1 by the inspiration phase by manual closure of the breathing gas outlet nozzle 8 or breathing gas outlet hose 9 is triggered. In this case, the inspiratory pressure is limited by the emergency ventilation valve 39.

For spontaneous breathing of patient 6, the ventilator is switched to CPAP / PEEP breathing assistance. The changeover takes place by means of a selector switch on the control part 1. In this form of ventilation, the valve combination 2 assumes the function of the expiratory pressure limiter and the patient 6 breathes in the expiration phase against the continuously adjustable end-expiratory pressure.

The parts separately shown breathing gas source 10 and heating and humidification 11 may be attached to the electronic control part 1.

According to Fig. 2, the valve combination 2 consists of a housing 15, a valve base 16, a rotatably mounted on the housing 15 housing head 17 and an air filter 18. In the housing 15 is a solenoid valve 19. The actuator of the solenoid valve 19 is a Gleichstromzugmagnet 20. Der Anchor shaft 21 is connected by the adjusting nut 22 with the valve plate 23 and stored in the bearing plate 24. The valve seat is formed by a number of circularly arranged valve tubes 25, which open into an annular channel 26. The same is connected through the channel 27 and the air chamber 28 with the hose nozzle 29, on which the hose of the breathing gas return line 7 is plugged. On the housing stub 30 of the connected to the annular channel 26 hose stub 31 is arranged for the manometer hose 13 and the dipole coupling 32 for the signal line 12.

On the housing stub 33, the rotatable housing head 17, which includes a throttle 34 and a spring-loaded adjustable pressure relief valve 35 stores. On the housing head 17 of the hose nozzle 29 for the respiratory gas return line 7, the hose nozzle 36 for the breathing gas supply line 4 and the nozzle 37 for the air filter 18 is present. At the rotatably mounted on the nozzle 37 air filter 18 of the breathing gas inlet nozzle 3 is arranged.

The valve foot 16 contains the adjustable by means of the screw 38 spring-loaded emergency breathing valve 39. At the valve foot 16, a breathing gas outlet nozzle 8 is flanged. The respiratory gas supply line 4 and the respiratory gas return line 7 connect the valve combination 2 to the tracheal distribution head 5, which has two hose stubs 40 for this purpose. At Trachealverteilerkopf 5 is a connector piece 41 for the connection of the tracheal tube and a closure member 42 for opening the tube at suction. The breathing gas coming from the respiratory gas source 10 flows through the valve combination 2 in the direction of arrow A-B-C-D. In accordance with the selected ventilation mode and the signals arriving from the control unit 1, the solenoid valve 19 regulates the pressure profile of the respiratory gas flow in the direction of arrow E for the ventilation of the patient 6 in the inspiratory phase and the end expiratory pressure in the expiratory phase.

In case of failure of the electronic control is triggered by manual closure of the breathing gas outlet nozzle 8, the inspiration phase and the ventilation pressure builds up according to the set resistance of the emergency ventilation valve 39. In this case, the breathing gas flows through the emergency ventilation valve 39 and the bores in the valve foot 16.

Any inadmissible high breathing gas pressures are intercepted by the pressure relief valve 35. In this case, the pressure relief valve 35 is set slightly higher than the normally applied inspiratory pressure.

The throttle 34 is adjusted in the HF-ventilation so that in the respiratory gas flow in front of the throttle 34 there is a pressure substantially exceeding the inspiratory pressure. Thus, the device dead space is reduced to the short breathing gas from the throttle 34 to the solenoid valve 19, which is the prerequisite already mentioned for the RF oscillation. The same is generated by the magnetic valve 19 by means of the normal breathing cycle superimposed RF pulses of 5 to 25 Hz.

An essential feature of the valve combination 2 according to the invention is the valve seat of the solenoid valve 19 consisting of a number of valve tubes 25, the sum of the tube cross sections of n-valve tubes being a constant variable determined by the resistance-free flow of the respiratory gas volume flow.

This valve seat design is the prerequisite for the self-regulation of the pressure constant of the solenoid valve 19, since with the number of valve tubes 25, the force-displacement behavior of the valve with the force-displacement behavior of the Gleichstromzugmagneten 20th

can be brought into conformity constructively. This adaptation is an important requirement for the function

the solenoid valve 19 in the ventilation process, since the solenoid valve 19 must keep the back pressure constant even with a change in the breathing gas volume flow. Thus, the required during ventilation operating conditions such. B. ensures the inspiratory and the end-expiratory pressure plateau constant and reproducible. Due to the inventive design of the solenoid valve 19, the control devices usually required for control valves come into elimination.

Essential within the meaning of the invention, it is also that with this valve seat design, the travel of the solenoid valve 19 are very small. This is a prerequisite for the modulation of RF pulses, for which very short switching times and a low-inertia working of the solenoid valve 19 are required.

Another advantage of the valve seat according to the invention arises from the fact that the extremely thin-walled valve tubes 25 form a very small contact surface with the valve plate 23. It is thus achieved a favorable flow through the valve and reduces the risk of a possible adhesion of the valve plate 23 to the valve seat.

In addition, thus possibly occurring in flow processes a continuous control negatively influencing phenomena such. As the aerodynamic paradox switched off.

It has been found that the design parameters must be determined experimentally for the most part. For a better understanding, the connections described are explained in more detail as follows:

Each of the extremely thin-walled valve tubes 25 forms an annular gap at the valve opening with the valve plate 23, the area of which is the product of the valve tube circumference and the valve air gap. The sum of the annular gap areas of n-VentiIrohren is decisive for the resistance in the sealing zone and thus for the back pressure at a certain respiratory gas volume flow.

The ventilation pressure is composed of the resistance in the sealing zone of the valve which can be controlled by the magnetic force and the fixed resistance of the parts through which it flows.

Consequently, for example, caused by increase in volume flow pressure increase must be compensated by corresponding reduction in the resistance in the sealing zone. This requires a reduction in magnetic attraction. This change in the magnetic field is dependent on a specific travel of the armature. To achieve a self-regulating pressure stability of the other hand, dependent on the increase in volume flow valve travel must be adapted to the travel of the armature. This is structurally possible with the valve seat according to the invention by arranging a certain number of valve tubes 25.

The number of valve tubes 25 results from the square of the quotient of the required Ventilstellwegkorrektur with

"'_ { -H- \ 2

where H is the valve lift of a monotube valve and H n is the valve lift at n-valve tubes. The diameter d n of the valve tubes is thereafter

d r = d ψη - 1

when d is the predetermined diameter of the monotube valve.

Claims (5)

  1. Invention claim:
    1. ventilator with universal valve combination with self-regulating pressure stability for neonatology, characterized in that the electronic control part (1) outside the incubator (14) and the valve combination (2) within the incubator (14) in the immediate vicinity of the patient (6) and by the signal line (12) and manometer hose line (13) is connected, the outside of the incubator (14) located breathing gas source (10) by means of hose over the heating and humidification (11) with the incubator (14) located Atemgaseintrittsstutzen (3) connected to the air filter (18) of the valve combination (2) and on the valve combination (2) the Trachealverteilerkopf (5) on the patient (6) by means of breathing gas supply (4) and respiratory gas return line (7) is connected and flanged the Atemgasaustrittsstutzen (8).
  2. 2. The ventilator according to item 1, characterized in that the valve combination (2) has a valve foot (16) with Atemgasaustrittsschlauch (9) on which a housing (15) with rotatable housing head (17) and air filter (18) and in a Gleichstromzugmagnet (20) with solenoid valve (19) whose seat is formed by a number of circularly mounted valve tubes (25) via annular channel (26), channel (27), air chamber (28) with the hose nozzle (29) and breathing gas return line (7) are connected, and on the housing head (30) is connected to the annular channel (26) for the Manometer hose (13) serving hose nozzle (31) and for the signal line (12) serving Dipolkupplung (32) rotatable housing head (17) includes a throttle (34) and a pressure relief valve (35) and to this are a hose nozzle (29) with breathing gas return line (7), hose nozzle (36) with breathing gas supply (4) and nozzle (37) with air filter (18 ) and Breathing gas inlet nozzle (3) arranged.
  3. 3. The ventilator according to item 1, characterized in that the respiratory gas source (10) and heating and humidification (11) to the electronic control part (1) are cultivated.
  4. 4. The ventilator according to item 2, characterized in that the valve foot (16) at its lower end by a screw (38) adjustable, spring-loaded emergency breathing valve (39).
  5. 5. The ventilator according to item 1 and 2, characterized in that the Trachealverteilerkopf (5) has two hose nozzle (40), wherein a hose nozzle with the breathing gas supply line (4) and the other with the respiratory gas return line (7) is connected and one for connecting the Tracheal tube suitable connector socket (41) and a suitable opening of the tracheal tube during suction closure member (42).
DD85278566A 1985-07-15 1985-07-15 Ventilation unit with universal valve combination for neonatology DD239337A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DD85278566A DD239337A1 (en) 1985-07-15 1985-07-15 Ventilation unit with universal valve combination for neonatology

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DD85278566A DD239337A1 (en) 1985-07-15 1985-07-15 Ventilation unit with universal valve combination for neonatology
DE19863623162 DE3623162A1 (en) 1985-07-15 1986-07-10 Ventilator with universal valve combination for neonatology

Publications (1)

Publication Number Publication Date
DD239337A1 true DD239337A1 (en) 1986-09-24

Family

ID=5569605

Family Applications (1)

Application Number Title Priority Date Filing Date
DD85278566A DD239337A1 (en) 1985-07-15 1985-07-15 Ventilation unit with universal valve combination for neonatology

Country Status (2)

Country Link
DD (1) DD239337A1 (en)
DE (1) DE3623162A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE50013613D1 (en) 1999-08-05 2006-11-23 Map Medizin Technologie Gmbh Device for supplying a gas and humidification device
DE19936499A1 (en) * 1999-08-05 2001-02-08 Map Gmbh Breathing gas moistening arrangement, having dosage arrangement for conveying part of fluid from storage chamber into moistening area
US6935337B2 (en) 2001-02-16 2005-08-30 Resmed Limited Humidifier with structure to prevent backflow of liquid through the humidifier inlet
AU2003903139A0 (en) 2003-06-20 2003-07-03 Resmed Limited Breathable gas apparatus with humidifier
NZ728764A (en) 2003-06-20 2018-09-28 ResMed Pty Ltd Breathable gas apparatus with humidifier
US8365726B2 (en) 2007-06-07 2013-02-05 Resmed Limited Tub for humidifier
US8931481B2 (en) 2009-06-04 2015-01-13 Redmed Limited Flow generator chassis assembly with suspension seal
DE102017009606A1 (en) * 2017-10-13 2019-06-19 Drägerwerk AG & Co. KGaA Method and device for high-frequency ventilation of a patient

Also Published As

Publication number Publication date
DE3623162A1 (en) 1987-01-22

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