WO1993024810A1 - Spirometer, insbesondere ultraschall-spirometer - Google Patents
Spirometer, insbesondere ultraschall-spirometer Download PDFInfo
- Publication number
- WO1993024810A1 WO1993024810A1 PCT/EP1993/001109 EP9301109W WO9324810A1 WO 1993024810 A1 WO1993024810 A1 WO 1993024810A1 EP 9301109 W EP9301109 W EP 9301109W WO 9324810 A1 WO9324810 A1 WO 9324810A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- spirometer
- tube
- measuring
- inserts
- largely
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/662—Constructional details
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
- A61B5/087—Measuring breath flow
Definitions
- the invention relates to a spirometer, in particular an ultrasound spirometer, in which a transmitter / receiver cell pair is arranged obliquely or perpendicularly to the measuring tube axis in a measuring section.
- Spirometry ie the measurement of air movements during breathing
- measuring devices which measure the volume flow of a gas in a pipe by determining the flow velocity. The volume flow then results from the product of the cross-sectional area of the pipe and the average flow velocity.
- the temporal course of the volume flow during inhalation and exhalation is of interest.
- the amount of air inhaled or exhaled in a certain time interval can be determined by integration.
- pulmonary function diagnosis pneumotachography
- ultrasound spirometers of the type mentioned at the outset are known, in which a pair of transmitter / receiver cells is arranged in a measuring section at an angle to the measuring tube axis.
- the flow rate is determined via ultrasound Doppler measurement.
- This measuring technique allows a precise measurement of the flow fields within the measuring tube axis and thus an exact determination of the volume flow.
- these measuring devices have the disadvantage that the measuring tube is contaminated with germs and the like with each measurement. It is therefore necessary to disinfect the measuring tube after each measurement, which is complicated on the one hand, but on the other hand represents a constant source of the risk of infection if carried out improperly.
- the object of the present invention is to develop a generic spirometer such that a trouble-free flow rate measurement while ensuring the necessary hygiene is possible.
- this object is achieved by the characterizing features of claim 1. Accordingly, a possibly sterile, easily exchangeable tube is inserted into the measuring tube of the ultrasound spirometer with a precise fit. At the transition to the measuring section, this measuring window has the type that inserts are used in the corresponding openings, which are on the one hand permeable to sound waves, but largely impermeable to germs.
- This solution is based on the finding that ultrasound-permeable windows must be present in the area in which the measuring section opens into the measuring tube axis, since the wall of an inserted tube would dampen the ultrasonic waves too strongly and would therefore make an ultrasonic 1-Doppler measurement impossible .
- the inserts inside the measuring window ensure that as far as possible no germs and also as little other contamination as possible can penetrate into the measuring section, which in turn would result in complex cleaning of the measuring apparatus.
- the inserts consist of elastic plastic, in particular foam rubber.
- Experimental studies have shown that the elasticity of foam rubber allows the ultrasonic waves to be transmitted through the measuring window.
- the measuring windows closed by the foam rubber insert are largely impermeable to the germs contained in the breathing air.
- the pores of the foam rubber have a labyrinth-like, open communication and therefore do not form a seal, such as a dense membrane.
- the pores are not flowed through in use, since the sensor, which is arranged behind the foam rubber window, is arranged in a blind sack.
- the inserts made of elastic plastic and in particular of foam rubber can additionally be impregnated with a germicidal agent.
- the measuring windows in the spirometer In order to be able to insert the measuring windows in the spirometer in the correct position, it can be divided in a plane running through the measuring tube in such a way that it can be opened in this plane passing through the measuring tube. After the sterile packaging has been removed, the sterile tube can be inserted in the correct position in the correspondingly opened spirometer.
- centering lugs or centering flanges can optionally be provided on the measuring tube, which additionally prevent the tube from slipping when the ultrasound spirometer is closed.
- the inserts consist of very thin plates. Compared to the wavelengths generated, these must be so thin that they can be set into vibrations by the ultrasonic waves. So-called Mylar films are suitable for this.
- the plates are transparent to the ultrasonic waves.
- the sterile tube can have two opposite, parallel surfaces, the width of which ideally corresponds to the width of the plates which are rectangular in shape.
- the rectangular plates forming the inserts are coplanar with the corresponding parallel surfaces.
- the sterile tube can in turn have centerings for accurate insertion.
- These can consist, for example, of a flange with a centering recess. Further details and advantages of the present invention are explained in more detail below with reference to the embodiments shown in the drawing. Show it: 1 shows a sectional illustration of an ultrasound spirometer according to a first embodiment of the present invention and
- the structure of the ultrasound spirometer 10 essentially corresponds to that which has already been described in CH 669463 A5.
- the central parts of this ultrasonic spirometer consist of the measuring tube 12 for the breathing air and the measuring section 16 arranged obliquely thereto.
- the transmitting and receiving elements 32 and 36 are arranged in corresponding chambers 30 and 34.
- a sterile or possibly almost sterile tube 14 is inserted, which has 16 measuring windows at the transition to the measuring section in such a way that inserts 18 made of foam rubber are inserted in corresponding openings. These foam rubber inserts 18 are glued on the edge to the corresponding openings of the measuring tube 12 and protrude into the respective sloping channel of the measuring section 16.
- the largely sterile tube 14 can consist of any material.
- the use of plastic tubes is contemplated. It would be advantageous to use a plastic that is easy to rot. In principle, it is also possible to use paper tubes or tubes made of other sterilizable materials that can rot.
- the foam rubber inserts can be impregnated with a germicidal agent.
- the ultrasound spirometer according to FIG. 1 is divided in a manner not shown in the plane of the measuring tube 12. As a result, it can be opened for inserting and removing the sterile tube 14.
- the sterile tube 14 is not formed with a circular cross section.
- the sterile tube 14 has two plane-parallel side surfaces 22 and 24. From Fig. 2b it can be seen that within these plane-parallel plates 22 and 24 each rectangular plates 20 are used to cover the measuring window. These plates 20 run co-planar to the parallel planes 22 and 24. It is crucial for the functionality of the ultrasound spirometer that the plates 20 are so thin in comparison with the generated ultrasound waves that they can be set into vibrations by the ultrasound waves are, so that the ultrasonic waves can continue beyond the window in the sterile tube 14.
- the width of the rectangular plates 20 also corresponds to the width of the parallel surfaces 22 and 24 of the sterile tube 14.
- the position of the measuring window 20 is shown again in FIG. 2a, the course of the measuring section 16 inclined by an angle alpha being shown for clarification.
- the sterile measuring tube has a flange 26 with a centering recess 28. If the measuring tube 14 according to the embodiment according to FIG. 2 is used in an ultrasound spirometer according to FIG. 1, this can be done simply by opening the flange 26 without opening the spirometer in that the flange 38 and the ring shaped part 40 are unscrewed or removed and that sterile tube 14 is used. The exact position of the sterile tube 14 in the measuring tube 12 is ensured by the engagement of a device-side projection in the centering recess 28 on the flange 26 of the sterile tube 14.
- a precise, spirometric sensor which does not hinder the respiratory flow and, moreover, contains a disposable part which is as small as possible in terms of mass and which allows a safe hygienic barrier.
Landscapes
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medical Informatics (AREA)
- Surgery (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Physiology (AREA)
- Molecular Biology (AREA)
- Pulmonology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6500117A JPH06509651A (ja) | 1992-06-03 | 1993-05-06 | 超音波肺活量計 |
DE59306177T DE59306177D1 (de) | 1992-06-03 | 1993-05-06 | Spirometer, insbesondere ultraschall-spirometer |
EP93909906A EP0597060B1 (de) | 1992-06-03 | 1993-05-06 | Spirometer, insbesondere ultraschall-spirometer |
US08/190,053 US5419326A (en) | 1992-06-03 | 1993-05-06 | Spirometer, more particularly an ultrasonic spirometer |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4218317 | 1992-06-03 | ||
DEP4218317.0 | 1992-06-03 | ||
DE4222286A DE4222286C1 (de) | 1992-06-03 | 1992-07-07 | Ultraschall-Spirometer |
DEP4222286.9 | 1992-07-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993024810A1 true WO1993024810A1 (de) | 1993-12-09 |
Family
ID=25915390
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1993/001109 WO1993024810A1 (de) | 1992-06-03 | 1993-05-06 | Spirometer, insbesondere ultraschall-spirometer |
Country Status (7)
Country | Link |
---|---|
US (1) | US5419326A (de) |
EP (1) | EP0597060B1 (de) |
JP (1) | JPH06509651A (de) |
AT (1) | ATE151871T1 (de) |
DE (2) | DE4222286C1 (de) |
ES (1) | ES2099948T3 (de) |
WO (1) | WO1993024810A1 (de) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997045707A1 (de) * | 1996-05-28 | 1997-12-04 | Krohne Ag | Ultraschall-durchflussmesser |
EP0952430A1 (de) * | 1998-04-23 | 1999-10-27 | Siemens-Elema AB | Ultraschall-Durchflussmesser |
WO2001047417A1 (de) * | 1999-11-16 | 2001-07-05 | Cortex Biophysik Gmbh | Ergospirometriesystem für tiere, insbesondere pferde, kamele oder dergleichen |
WO2009019105A1 (de) * | 2007-08-07 | 2009-02-12 | Endress+Hauser Flowtec Ag | Messgerät, zumindest teilweise aus biologisch abbaubarem kunststoff |
CN102564506A (zh) * | 2012-02-28 | 2012-07-11 | 曼瑞德自控系统(乐清)有限公司 | 一种超声波热量表管段及其安装方法 |
US10786178B2 (en) | 2014-11-10 | 2020-09-29 | Ndd Medizintechnik Ag | Breathing tube for use in ultrasonic flow measurement systems |
US11116421B2 (en) | 2017-05-16 | 2021-09-14 | Ndd Medizintechnik Ag | Method for conditioning a breathing tube |
US11154219B2 (en) | 2017-05-16 | 2021-10-26 | Ndd Medizintechnik Ag | Holding device for a breathing tube and method for reading out a coding on a surface of a breathing tube |
Families Citing this family (53)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE9410661U1 (de) * | 1994-07-01 | 1994-10-13 | NDD Medizintechnik GmbH, 97074 Würzburg | Ultraschall-Spirometer |
USD381991S (en) * | 1994-07-12 | 1997-08-05 | Discovery Communications, Inc. | Remote control unit |
US6189389B1 (en) | 1996-05-28 | 2001-02-20 | Krohne A.G. | Ultrasonic flowmeter |
DE19648784C2 (de) * | 1996-05-28 | 1998-04-09 | Krohne Ag | Ultraschall-Durchflußmesser |
US5792665A (en) * | 1996-05-29 | 1998-08-11 | Morrow, Iii; Donald W. | Oxygen sensing method and hand held analyzer therefore |
US6309360B1 (en) | 1997-03-17 | 2001-10-30 | James R. Mault | Respiratory calorimeter |
US6572561B2 (en) | 1998-01-16 | 2003-06-03 | Healthetech, Inc. | Respiratory calorimeter |
JP2002501806A (ja) | 1998-02-05 | 2002-01-22 | ジェームズ アール モールト | 呼吸ガス分析を用いた代謝熱量測定装置 |
SE9801007D0 (sv) * | 1998-03-25 | 1998-03-25 | Siemens Elema Ab | Anordning för mätning av ett gasflöde |
WO2000007498A1 (en) | 1998-08-03 | 2000-02-17 | Mault James R | Method and apparatus for respiratory gas analysis employing measurement of expired gas mass |
SE9803047D0 (sv) | 1998-09-09 | 1998-09-09 | Siemens Elema Ab | Fukt- och bakteriebarriär för medicinska komponenter |
US6406435B1 (en) | 1998-11-17 | 2002-06-18 | James R. Mault | Method and apparatus for the non-invasive determination of cardiac output |
EP1182431A4 (de) * | 1999-03-17 | 2006-06-14 | Matsushita Electric Ind Co Ltd | Ultraschall-durchflussmeter |
US7094206B2 (en) | 1999-04-23 | 2006-08-22 | The Trustees Of Tufts College | System for measuring respiratory function |
US6723055B2 (en) | 1999-04-23 | 2004-04-20 | Trustees Of Tufts College | System for measuring respiratory function |
AU4998600A (en) | 1999-05-10 | 2000-11-21 | James R. Mault | Airway-based cardiac output monitor and methods for using same |
US6468222B1 (en) * | 1999-08-02 | 2002-10-22 | Healthetech, Inc. | Metabolic calorimeter employing respiratory gas analysis |
WO2001028416A1 (en) | 1999-09-24 | 2001-04-26 | Healthetech, Inc. | Physiological monitor and associated computation, display and communication unit |
US6478736B1 (en) | 1999-10-08 | 2002-11-12 | Healthetech, Inc. | Integrated calorie management system |
US6612306B1 (en) | 1999-10-13 | 2003-09-02 | Healthetech, Inc. | Respiratory nitric oxide meter |
US6629934B2 (en) | 2000-02-02 | 2003-10-07 | Healthetech, Inc. | Indirect calorimeter for medical applications |
US6482158B2 (en) | 2000-05-19 | 2002-11-19 | Healthetech, Inc. | System and method of ultrasonic mammography |
US20030226695A1 (en) * | 2000-05-25 | 2003-12-11 | Mault James R. | Weight control method using physical activity based parameters |
US20040254501A1 (en) * | 2000-08-11 | 2004-12-16 | Mault James R. | Achieving a relaxed state |
AU2001288902A1 (en) * | 2000-09-07 | 2002-03-22 | Healthetech, Inc. | Portable computing apparatus particularly useful in a weight management program |
AU2001296456A1 (en) | 2000-09-29 | 2002-04-08 | Healthetech, Inc. | Indirect calorimetry system |
US20020133378A1 (en) * | 2000-10-13 | 2002-09-19 | Mault James R. | System and method of integrated calorie management |
US6607387B2 (en) | 2000-10-30 | 2003-08-19 | Healthetech, Inc. | Sensor system for diagnosing dental conditions |
US20020138213A1 (en) * | 2001-03-02 | 2002-09-26 | Mault James R. | System and method of metabolic rate measurement |
US20030023181A1 (en) * | 2001-07-26 | 2003-01-30 | Mault James R. | Gas analyzer of the fluorescent-film type particularly useful for respiratory analysis |
US7291114B2 (en) * | 2002-04-01 | 2007-11-06 | Microlife Corporation | System and method of determining an individualized drug administration protocol |
USD478660S1 (en) | 2002-07-01 | 2003-08-19 | Healthetech, Inc. | Disposable mask with sanitation insert for a respiratory analyzer |
US7108659B2 (en) * | 2002-08-01 | 2006-09-19 | Healthetech, Inc. | Respiratory analyzer for exercise use |
US20030126593A1 (en) * | 2002-11-04 | 2003-07-03 | Mault James R. | Interactive physiological monitoring system |
DE10316333B3 (de) * | 2003-04-10 | 2004-01-22 | Dräger Safety AG & Co. KGaA | Atemalkohol-Messgerät mit verbessertem Mundstück |
EP1632178A1 (de) * | 2004-09-03 | 2006-03-08 | ndd Medizintechnik AG | Verfahren zur nichtkooperativen Ultraschall-Lungendiagnose |
DE102005015456A1 (de) | 2005-04-04 | 2006-10-05 | Viasys Healthcare Gmbh | Verfahren zur Bestimmung der zeitlichen Lage eines Wellenpakets sowie Flussmessgerät |
US8460223B2 (en) | 2006-03-15 | 2013-06-11 | Hill-Rom Services Pte. Ltd. | High frequency chest wall oscillation system |
US8109268B2 (en) | 2007-01-08 | 2012-02-07 | Dräger Medical GmbH | Device for detecting a gas volume flow |
DE102008063503A1 (de) * | 2008-12-17 | 2010-08-05 | Ganshorn Medizin Electronic Gmbh | Lungendiagnosegerät mit vier Ultraschallelementen |
DE102009036288B4 (de) | 2009-08-06 | 2014-02-13 | Aceos Gmbh | Vorrichtung zur Entnahme einer Gasprobe aus der menschlichen Atmung |
DE102010004611A1 (de) | 2009-08-11 | 2011-02-17 | Aceos Gmbh | Anwendereinheit zur Bestimmung von Leistungsparametern aus Atemgasanalysen |
EP2322917B1 (de) | 2009-11-17 | 2012-05-02 | ndd Medizintechnik AG | Verfahren zur Signallinearisierung eines Gassensorausgangssignals |
DE102010063789A1 (de) | 2010-12-21 | 2012-06-21 | Endress + Hauser Flowtec Ag | Ultraschall-Durchflussmessgerät |
EP2583622B1 (de) | 2011-10-17 | 2016-03-02 | COSMED S.r.l. | Antibakterieller Filter für Tests der Atemfunktion |
US10078074B2 (en) | 2013-01-22 | 2018-09-18 | Arizona Board Of Regents On Behalf Of Arizona State University | Portable metabolic analyzer system |
DE102014004765B3 (de) | 2014-04-01 | 2015-07-09 | Ndd Medizintechnik Ag | Gerät für die Messung und Analyse des Multiple-Breath-Stickstoff-Auswaschverfahrens |
DE102014216553B3 (de) * | 2014-08-20 | 2016-02-11 | Landis+Gyr Gmbh | Durchflussmesser mit einem in ein Gehäuse eingesetzten Messeinsatz |
TR201704582A2 (tr) | 2017-03-27 | 2017-07-21 | Inofab Saglik Teknolojileri Anonim Sirketi | Ultrasoni̇k spi̇rometre |
WO2019074459A2 (en) | 2017-09-11 | 2019-04-18 | Inofab Saglik Teknolojileri Anonim Sirketi | DEVELOPMENT OF AN ULTRASONIC SPIROMETER BODY |
EP3566647B1 (de) * | 2018-05-07 | 2020-05-06 | ndd Medizintechnik AG | Verfahren zur überprüfung der kalibrierung eines spirometers |
CN109637662A (zh) * | 2019-02-14 | 2019-04-16 | 广东工业大学 | 一种肺功能检测及数据统计的方法及系统 |
US20230022892A1 (en) * | 2021-07-14 | 2023-01-26 | Sdi Diagnostics, Inc. | Breathing tube for use with spirometers that employ ultrasonic measurement systems |
Family Cites Families (8)
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FR2077827A1 (de) * | 1970-02-17 | 1971-11-05 | Thomson Csf | |
US3901078A (en) * | 1973-09-07 | 1975-08-26 | Westinghouse Electric Corp | Ultrasonic system for fluid flow measurement |
DE3171832D1 (en) * | 1980-10-31 | 1985-09-19 | Toshiba Kk | Respiration flowmeter |
JPH0634008B2 (ja) * | 1983-11-30 | 1994-05-02 | 株式会社東芝 | 成分流量測定装置 |
JPS60181616A (ja) * | 1984-02-29 | 1985-09-17 | Toshiba Corp | 流量測定管 |
CH669463A5 (en) * | 1985-03-21 | 1989-03-15 | Walter Guggenbuehl Prof Dr | Gas flow and temp. measuring device - uses ultrasonic pulses transmitted simultaneously in opposite directions at angle to gas flow |
JPH02236094A (ja) * | 1989-03-06 | 1990-09-18 | Toyoda Mach Works Ltd | 圧力流体用ホース |
US5035147A (en) * | 1990-02-09 | 1991-07-30 | Curtin Matheson Scientific, Inc. | Method and system for digital measurement of acoustic burst travel time in a fluid medium |
-
1992
- 1992-07-07 DE DE4222286A patent/DE4222286C1/de not_active Expired - Lifetime
-
1993
- 1993-05-06 US US08/190,053 patent/US5419326A/en not_active Expired - Lifetime
- 1993-05-06 ES ES93909906T patent/ES2099948T3/es not_active Expired - Lifetime
- 1993-05-06 WO PCT/EP1993/001109 patent/WO1993024810A1/de active IP Right Grant
- 1993-05-06 AT AT93909906T patent/ATE151871T1/de active
- 1993-05-06 EP EP93909906A patent/EP0597060B1/de not_active Expired - Lifetime
- 1993-05-06 JP JP6500117A patent/JPH06509651A/ja active Pending
- 1993-05-06 DE DE59306177T patent/DE59306177D1/de not_active Expired - Lifetime
Non-Patent Citations (5)
Title |
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IEEE TRANSACTIONS ON BIO-MEDICAL ENGINEERING Bd. 33, Nr. 8, August 1986, NEW YORK US Seiten 768 - 773 C.BUESS 'Design and Construction of a Pulsed Ultrasonic Air Flowmeter' * |
PATENT ABSTRACTS OF JAPAN vol. 10, no. 154 (P-463)4. Juni 1986 * |
PATENT ABSTRACTS OF JAPAN vol. 10, no. 177 (P-470)21. Juni 1986 * |
PATENT ABSTRACTS OF JAPAN vol. 10, no. 30 (P-426)5. Februar 1986 * |
PATENT ABSTRACTS OF JAPAN vol. 7, no. 290 (P-245)24. Dezember 1983 * |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997045707A1 (de) * | 1996-05-28 | 1997-12-04 | Krohne Ag | Ultraschall-durchflussmesser |
EP0952430A1 (de) * | 1998-04-23 | 1999-10-27 | Siemens-Elema AB | Ultraschall-Durchflussmesser |
WO2001047417A1 (de) * | 1999-11-16 | 2001-07-05 | Cortex Biophysik Gmbh | Ergospirometriesystem für tiere, insbesondere pferde, kamele oder dergleichen |
WO2009019105A1 (de) * | 2007-08-07 | 2009-02-12 | Endress+Hauser Flowtec Ag | Messgerät, zumindest teilweise aus biologisch abbaubarem kunststoff |
US7845238B2 (en) | 2007-08-07 | 2010-12-07 | Endress + Hauser Flowtec Ag | Measuring device |
CN102564506A (zh) * | 2012-02-28 | 2012-07-11 | 曼瑞德自控系统(乐清)有限公司 | 一种超声波热量表管段及其安装方法 |
US10786178B2 (en) | 2014-11-10 | 2020-09-29 | Ndd Medizintechnik Ag | Breathing tube for use in ultrasonic flow measurement systems |
US11116421B2 (en) | 2017-05-16 | 2021-09-14 | Ndd Medizintechnik Ag | Method for conditioning a breathing tube |
US11154219B2 (en) | 2017-05-16 | 2021-10-26 | Ndd Medizintechnik Ag | Holding device for a breathing tube and method for reading out a coding on a surface of a breathing tube |
Also Published As
Publication number | Publication date |
---|---|
DE59306177D1 (de) | 1997-05-22 |
ATE151871T1 (de) | 1997-05-15 |
EP0597060A1 (de) | 1994-05-18 |
ES2099948T3 (es) | 1997-06-01 |
EP0597060B1 (de) | 1997-04-16 |
DE4222286C1 (de) | 1994-05-11 |
JPH06509651A (ja) | 1994-10-27 |
US5419326A (en) | 1995-05-30 |
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