EP2470247A1 - Dispositif d'humidification de gaz respiratoire - Google Patents

Dispositif d'humidification de gaz respiratoire

Info

Publication number
EP2470247A1
EP2470247A1 EP10760236A EP10760236A EP2470247A1 EP 2470247 A1 EP2470247 A1 EP 2470247A1 EP 10760236 A EP10760236 A EP 10760236A EP 10760236 A EP10760236 A EP 10760236A EP 2470247 A1 EP2470247 A1 EP 2470247A1
Authority
EP
European Patent Office
Prior art keywords
humidifier
chamber
heating element
breathing gas
humidifier chamber
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.)
Withdrawn
Application number
EP10760236A
Other languages
German (de)
English (en)
Inventor
Peter Schaller
Georg Mainusch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
F STEPHAN GmbH MEDIZINTECHNIK
Original Assignee
F STEPHAN GmbH MEDIZINTECHNIK
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 F STEPHAN GmbH MEDIZINTECHNIK filed Critical F STEPHAN GmbH MEDIZINTECHNIK
Publication of EP2470247A1 publication Critical patent/EP2470247A1/fr
Withdrawn legal-status Critical Current

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
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/14—Preparation of respiratory gases or vapours by mixing different fluids, one of them being in a liquid phase
    • A61M16/16—Devices to humidify the respiration air
    • 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
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/105—Filters
    • A61M16/106—Filters in a path
    • A61M16/1065—Filters in a path in the expiratory path
    • 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
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/105—Filters
    • A61M16/106—Filters in a path
    • A61M16/107—Filters in a path in the inspiratory path
    • 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
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/1075—Preparation of respiratory gases or vapours by influencing the temperature
    • A61M16/1085—Preparation of respiratory gases or vapours by influencing the temperature after being humidified or mixed with a beneficial agent
    • 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
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/1075—Preparation of respiratory gases or vapours by influencing the temperature
    • A61M16/109—Preparation of respiratory gases or vapours by influencing the temperature the humidifying liquid or the beneficial agent
    • 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
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/1075—Preparation of respiratory gases or vapours by influencing the temperature
    • A61M16/1095—Preparation of respiratory gases or vapours by influencing the temperature in the connecting tubes
    • 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
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/14—Preparation of respiratory gases or vapours by mixing different fluids, one of them being in a liquid phase
    • A61M16/16—Devices to humidify the respiration air
    • A61M16/161—Devices to humidify the respiration air with means for measuring the humidity
    • 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
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/105—Filters
    • A61M16/1055—Filters bacterial
    • 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
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/003—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter
    • A61M2016/0033—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical
    • A61M2016/0039—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical in the inspiratory circuit
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3368—Temperature
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/36—General characteristics of the apparatus related to heating or cooling
    • A61M2205/3653—General characteristics of the apparatus related to heating or cooling by Joule effect, i.e. electric resistance

Definitions

  • the invention relates to a device for Atemgasbefeuchtung, which consists of at least one control and regulating device, a humidification chamber for humidifying the breathing gas with molecular steam, a humidifier associated heating element for heating the humidification chamber, a humidifier chamber upstream breathing gas inlet and a humidifier downstream of the Atemgasausgang.
  • This humidifier chamber is heated by means of a sheet-like heating element, the back side of which is thermally insulated from the environment in order to avoid power losses.
  • the humidifier chamber has a relatively large surface exposed to ambient air, at which the respiratory gas partially condenses, thereby typically exiting the humidifier chamber in a saturated state for delivery to the patient via the inspiratory breathing tube.
  • This saturation state is the prerequisite for the regulation of the humidity via a regulation of the temperature.
  • This saturation state is also the reason why inexpensive temperature and humidity meters can not be used due to the risk of condensation.
  • the ventilated volume of the humidifier chamber increases the compressible volume of the patient circuit. That can lead to certain Ventilation forms, such as. As the high frequency oscillation, be limited in their effectiveness. For this reason, it is attempted to keep the chamber volume of breathing gas humidifiers as low as possible. However, this is limited by the demand for a high humidifier area.
  • the object of the invention is now to propose a device for Atemgasbefeuchtung that allows for low compressible volume direct regulation of the respiratory gas moisture.
  • the device for breathing gas humidification comprises at least one control and regulating device, a humidifier chamber for humidifying the respiratory gas with molecular steam, a heating element assigned to the humidifier chamber for heating the humidifier chamber, a respiratory gas inlet upstream of the humidifier chamber and a respiratory gas outlet downstream of the humidifier chamber.
  • a heatable Nachffyrange is disposed between the output of the humidifier and the Atemgasausgang, wherein in or after NachMap zone at least one temperature-humidity sensor is placed, which in conjunction with the control and regulating device, the humidifier chamber and the heating element to a humidity control loop added.
  • the saturated breathing gas leaving the humidifier chamber flows according to the invention through the reheating section whose temperature is above the
  • the temperature humidity sensor forms with the heating element of the humidification chamber and with a first humidity controller of the control and regulating device a control loop, which controls the temperature in the humidifier chamber via the heating power supplied to the heating element in such a way that the desired absolute humidity is established at the temperature humidity sensor.
  • the absolute humidity is naturally temperature independent. Although reheating in the reheating section increases the temperature of the respiratory gas, at the same time its relative humidity is reduced, while its absolute humidity remains constant.
  • the control law of the first humidity controller regulates the absolute humidity on the basis of known relationships between temperature and relative humidity. For reasons of redundancy, it is optionally possible to provide an additional, second temperature / humidity sensor, wherein one of the two temperature humidity sensors for the humidity control and the second temperature / humidity sensor are used for the monitoring.
  • the at least one temperature-humidity sensor is protected from radiant heat, so that it actually detects only the temperature of the moist breathing gas flowing around it. It is also possible to place this or these temperature-humidity sensors in a branch immediately after Nachrouzone, through which constantly flows a small flow of breathing gas into the open air.
  • the Nachsagenpiece can be formed by a pipe, a pipe system, multiple holes, a volume flowed through area or other known in the art flow systems.
  • their inner surfaces, which are in thermal contact with the respiratory gas have a higher temperature than the moist respiratory gas flowing into the reheating section.
  • the energy for heating the Nachsagenrange can advantageously be obtained directly from the waste heat of the heating element of the humidifier by, for example, a first side of the heating element heats the humidifier and a second side of the heating element at least partially the Nachflowerrange.
  • This has the advantage that the requirements for the thermal insulation of the heating element are lower.
  • the humidifier chamber in a cylindrical shape, wherein a second cylinder is concentrically placed around this cylinder and forms the reheating section.
  • the heating element On the inner cylinder jacket, the heating element is placed, which is partially thermally insulated from the Nachannezone. That's how it heats
  • Heating element with its inside the humidifier chamber and with its outside partially the Nachflowerzone.
  • the humidifier chamber is at least partially filled with water.
  • at least two heatable temperature sensors are provided whose resistance changes depending on whether they are surrounded by air or water. Above one located above the water level in the humidifier chamber Bore then flows the breathing gas from the humidifier chamber directly into the reheating section.
  • the humidifier chamber is filled to achieve a small compressible volume with a chamber filling in the form of an absorbent material having air-conducting channels through which the initially dry breathing gas flows to saturate during this passage.
  • This filling of the chamber increases the active surface which can be used for moistening, thereby improving the effectiveness of moistening.
  • absorbent material is preferably used an absorbent ceramic, for. B. a glass sintered ceramic, the air ducting channels, the z. B. meandering or annular, is traversed.
  • all other forms such. B. annular, spiral and other forms known in the art of flow channels possible.
  • the filling of the humidifying chamber with an absorbent ceramic granulate has also proved to be very advantageous. This is preferably spherical in the form of sintered glass spheres, so that the respiratory gas flows through this ball packing with a low flow resistance.
  • the humidifier water should only be directed to the surfaces around it by the suction of the absorbent material. It is disadvantageous if the water fills the channels themselves. With meandering channels, for this purpose, only the part of the chamber filling located below the channel bottom advantageously enters the humidifier water.
  • Humidifier preferably via an automatic refill system, which, for example, from solenoid valves and a reservoir for
  • Stock of sterile water is built up.
  • the water refill to Compensation of the water loss resulting from the evaporation can be done in different ways, for example via float valves, pinch valves and the like.
  • As an indicator of the water level at least two, but preferably three superimposed temperature sensors are provided in one embodiment of the invention. These are heated by an injected current to a temperature above 100 ° C, as long as they are surrounded by air. However, if it surrounds the humidifier water, it will be cooled down. This cooling is associated with a resistance change that is exploited for level detection.
  • the knowledge of the respiratory gas volume flow is required.
  • a volume flow sensor is used.
  • the flow resistance of the humidifier chamber and / or of the reheating section is used in conjunction with a differential pressure sensor for determining the respiratory gas volume flow.
  • the differential pressure sensor measures the pressure difference between the input and output og chambers, from which then the volumetric flow can be determined.
  • the bacteria filter fulfills the task of eliminating any particles of the chamber filling.
  • the inspiratory bacterial filter is additionally either from the waste heat the one or more of the above heating elements heater and / or an additional heating element heated.
  • Bacterial filter is also increased.
  • the waste heat of the heating element and / or an additional heating element is also used for this purpose.
  • a very convenient and cost-saving way to disinfect the Atemgasbefeuchters is to heat the humidifier and reheating after use on the patient so far that harmful bacteria are killed.
  • This measure has the advantage that the device for breathing gas humidification according to the invention is dry when not in use, as a result of which germ growth is hindered.
  • by coating the walls in the entire area through which both the humidifier chamber and the Nachelles using bacteriostatic materials such. As silver or copper, a germ growth can be prevented.
  • Fig. 1 a schematic representation of the device for
  • the dry respiratory gas is supplied via the breathing gas inlet 5 of the humidifier chamber 2.
  • This block filling 10 forming block is within the humidifier, but its water level is still below the bottom of the meandering channel.
  • the respiratory gas flows through this channel, saturates there to then be further heated in the NachMap zone 7.
  • two temperature humidity sensors 8.1 and 8.2 are arranged, which are flowed around by the breathing gas. They are electrically connected to the control unit 1.
  • the humidifier chamber 2 is the heating element 3 and the Nachsagenplex 7 associated with the heating element 9.
  • the two heating elements 3, 9 are formed as separate components and are independently controllable.
  • the first control loop is used for humidity control and includes the heating element 3, the first temperature-humidity sensor 8.1 and the controller 1.1 of the control and regulation unit 1.
  • This controller 1.1 controls the heating power of the heating element 3 in such a way that z. B. sets a desired absolute humidity of 44 mg / l.
  • the controller 1.1 takes into account the measured temperature and relative humidity of the first temperature-humidity sensor 8.1 and calculates the absolute humidity according to known algorithms.
  • the second control circuit is used to control the temperature of Nachmorezone 7 and is formed by the heating element 9, the temperature sensor of the second temperature-humidity sensor 8.2 and the controller 1.2.
  • This regulator 1.2 regulates the heating power for the Nachmorezone 7 associated heating element 9 in such a way that the breathing gas leaves the Nachsagenplex 7 at a temperature of 44 0 C.
  • the differential pressure sensor 8.4 determines the pressure difference across the humidifier 2. From this pressure difference is calculated using the control unit 1 according to a known pressure-volume flow characteristic of the humidifier 2 by flowing respiratory gas volume flow. This respiratory gas volume flow enters as another parameter in the control law for the absolute humidity of the controller 1.1.
  • the refill system 4 is formed by a reservoir for receiving sterile water 4.1, a solenoid valve 4.2 for the inlet to the humidifier chamber 2 and a solenoid valve 4.3 for the drain from the humidifier 2.
  • the water level is controlled by a system of three heated, stacked thermistors, which are shown as temperature sensor 8.3 determined. By heating the thermistors in the environment by air to a temperature above 100 0 C, they can only be cooled in the event of immersion in water The associated resistance change is evaluated in the control unit 1.
  • the solenoid valves 4.2 and 4.3 are switched by means of the control and regulating unit 1 accordingly and so kept the water level at a desired level.
  • the environment is heated by a part of the heating element 9 with. In this way, the condensation of humid inspiratory air in the bacterial filter 11 is avoided.
  • a humidifier chamber 2 in the form of a downwardly closed cylinder, which is surrounded by an equally cylindrical Nachmorenote 7.
  • an annular heating element 3 is placed on the outer wall of the humidifier chamber 2. So it heats inside the humidifier chamber 2 and to the outside of Nachmorenote 7.
  • the heating element 3 is partially surrounded by a thermal insulation against the Nachutzrange 7, via which the degree of reheating can be set.
  • the humidifier chamber 2 is filled with a chamber filling 10 in the form of highly absorbent ceramic balls.
  • the humidifier chamber 2 has a humidifier chamber inlet located at the cylinder entrance, one in the lower area, z.
  • an inlet for the water filling and a below the Befeuchtercros opening water overflow can drain over the excess water from the humidifier 2.
  • the humidifier water flows through the chamber filling 10 from top to bottom, whereby their constant humidification is ensured.
  • the dry respiratory gas flows via the humidifier chamber inlet into the humidifier chamber 2, and absorbs water vapor as it flows through the cavities between the ceramic balls. It leaves the humidifier chamber 2 via the humidifier chamber outlet and enters the reheating section 7. There it is heated further, it is drier and it comes in the area of the breathing gas outlet 6 not to condensation.
  • the one temperature and humidity sensor 8.1 of the control and the second temperature and humidity sensor 8.2 is used to monitor the humidity.
  • the bottom of the humidifier chamber 2 is connected by means of a hose with a transparent pipe section, in which the water level corresponds to the water level present in the interior of the humidifier 2. Using a tube, this tube piece is connected to the upper part of the humidifier chamber 2.

Landscapes

  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Air Humidification (AREA)

Abstract

L'invention concerne un dispositif d'humidification de gaz respiratoire, qui comprend au moins un appareil de commande et de régulation (1), une chambre (2) d'humidificateur conçue pour humidifier le gaz respiratoire au moyen de vapeur d'eau moléculaire, un élément chauffant (3) associé à la chambre d'humidificateur qui permet de chauffer cette dernière (2), une entrée de gaz respiratoire (5) disposée en amont de la chambre (2) d'humidificateur, et une sortie de gaz respiratoire (6) disposée en aval par rapport à la chambre (2) d'humidificateur. Selon l'invention, un segment de post-chauffage chauffable (7) est disposé entre la sortie de la chambre (2) d'humidificateur et la sortie de gaz respiratoire (6), au moins un capteur de température/d'humidité (8.1, 8.2) étant placé dans ou après l'élément de post-chauffage chauffable (7), ledit capteur de température/d'humidité étant fourni pour former une boucle de commande d'humidité conjointement avec l'appareil de commande et de régulation (1), la chambre (2) d'humidificateur, et l'élément chauffant (3).
EP10760236A 2009-08-26 2010-08-17 Dispositif d'humidification de gaz respiratoire Withdrawn EP2470247A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910038635 DE102009038635B4 (de) 2009-08-26 2009-08-26 Vorrichtung zur Atemgasbefeuchtung
PCT/DE2010/000970 WO2011023165A1 (fr) 2009-08-26 2010-08-17 Dispositif d'humidification de gaz respiratoire

Publications (1)

Publication Number Publication Date
EP2470247A1 true EP2470247A1 (fr) 2012-07-04

Family

ID=43066944

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10760236A Withdrawn EP2470247A1 (fr) 2009-08-26 2010-08-17 Dispositif d'humidification de gaz respiratoire

Country Status (3)

Country Link
EP (1) EP2470247A1 (fr)
DE (1) DE102009038635B4 (fr)
WO (1) WO2011023165A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115220499B (zh) * 2021-04-21 2024-05-31 南京润楠医疗电子研究院有限公司 基于呼吸机的温湿度控制系统和方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6918389B2 (en) * 2000-03-21 2005-07-19 Fisher & Paykel Healthcare Limited Breathing assistance apparatus
LT4049703T (lt) * 2004-08-20 2023-11-10 Fisher & Paykel Healthcare Limited Prietaisas pacientui tiekiamų dujų savybėms matuoti
DE102005000690B3 (de) * 2005-01-04 2006-05-11 Dräger Medical AG & Co. KG Beatmungsanfeuchter
AU2008208148B2 (en) * 2007-01-23 2014-04-17 Fisher & Paykel Healthcare Limited Humidification apparatus having RFID tag sensor at patient end of gas pathway
EP2247331B1 (fr) * 2008-01-25 2017-05-10 Salter Labs Système de thérapie respiratoire comprenant un ensemble canule nasale
US8944057B2 (en) * 2008-09-17 2015-02-03 Resmed Limited Method and apparatus for controlling a CPAP device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011023165A1 *

Also Published As

Publication number Publication date
DE102009038635B4 (de) 2015-02-19
DE102009038635A1 (de) 2011-03-03
WO2011023165A1 (fr) 2011-03-03
DE102009038635A8 (de) 2011-06-01

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