WO2001030431A1 - Tubus comprising a device for dynamically detecting the endotracheal pressure - Google Patents

Tubus comprising a device for dynamically detecting the endotracheal pressure Download PDF

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Publication number
WO2001030431A1
WO2001030431A1 PCT/EP2000/009472 EP0009472W WO0130431A1 WO 2001030431 A1 WO2001030431 A1 WO 2001030431A1 EP 0009472 W EP0009472 W EP 0009472W WO 0130431 A1 WO0130431 A1 WO 0130431A1
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WIPO (PCT)
Prior art keywords
pressure
pressure sensors
tubus
sensors
tube
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PCT/EP2000/009472
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German (de)
French (fr)
Inventor
Wolfgang Barnikol
Original Assignee
Glukomeditech Ag
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Publication date
Application filed by Glukomeditech Ag filed Critical Glukomeditech Ag
Priority to AU15143/01A priority Critical patent/AU1514301A/en
Publication of WO2001030431A1 publication Critical patent/WO2001030431A1/en

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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
    • A61M16/04—Tracheal 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
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/0027—Accessories therefor, e.g. sensors, vibrators, negative pressure pressure meter
    • 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
    • A61M2016/0036—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical in the breathing tube and used in both inspiratory and expiratory phase
    • 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
    • A61M2205/3331—Pressure; Flow
    • 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
    • A61M2205/35—Communication
    • A61M2205/3546—Range
    • A61M2205/3561—Range local, e.g. within room or hospital
    • 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
    • A61M2205/35—Communication
    • A61M2205/3576—Communication with non implanted data transmission devices, e.g. using external transmitter or receiver
    • A61M2205/3592—Communication with non implanted data transmission devices, e.g. using external transmitter or receiver using telemetric means, e.g. radio or optical transmission

Definitions

  • Tube with device for dynamic detection of endotracheal pressure Tube with device for dynamic detection of endotracheal pressure
  • the invention relates to a sensor tube for the dynamic detection of the endotracheal pressure, the respiratory flow and mechanical cardio- respiratonischen signals with the features of the claims
  • So-called tubes are used in medicine as a connector to artificially ventilate people who can no longer breathe themselves with a suitable machine (respirator).
  • Artificial respiration is usually monitored with the help of pressure and flow sensors, which are located on the respirator itself
  • the respiratory sensors are located on the respirator and not directly on the patient, i.e. on the tube, because during the weaning period, if the ventilation machine is temporarily disconnected, the doctor has no measurement technology Monitoring of the respiration, especially the ventilation, for the determination of which the continuous registration of the respiratory flow is a prerequisite
  • the signal of the respiratory flow must be sufficiently short 90% -
  • a second pressure measurement at the base of the tube would be desirable, so that the pressure drop caused by the respiratory flow can serve as a measure of the respiratory flow. This would also offer the possibility of both tidal volumes - the inspiratory and expiratory - against each other for a long time accounted for
  • the so-called mechanical ones can also be used determine cardio-respiratory signals, which in turn enable functional diagnosis of the bronchial system
  • a pressure sensor is inserted directly into the wall at the tip of the tube, so that the pressure line does not have to be via an air line to the base of the tube, and secondly the connector does not is included in the sensor system so that it can be replaced as required
  • the sensor system has no dead time.
  • the use of quickly indicating micro-pressure sensors with an upper limit frequency of preferably at least 1000 Hz means that the 90% setting time of the sensor System remains less than 1 ms
  • Fig. 1 schematically shows the longitudinal section of the sensor tube
  • the basic body of the tube corresponds to that of a normal tube (1), which is provided close to the tip (5) in the case of an adult tube with a sealing collar (2).
  • a differential pressure sensor (3 ) In the inner wall near the tip there is a differential pressure sensor (3 ), the other (4) in the inner wall near the base (6) of the tube, but far enough away that a connector can be inserted there
  • Both pressure sensors (3,4) are attached to the lumen of the tube in a liquid-tight manner Via an air duct ( 7), which runs in the wall of the tube (1), the "back sides" of both pressure sensors are pneumatically connected to each other, this channel also has an opening (8) to the atmosphere, so that both pressure sensors are pneumatically grounded on their back side.
  • the pneumatic channel also contains the cable connections Binding (1 1) of the pressure sensors to the measuring device (9) This is located at the base end of the sensor tube. It preferably also contains a transmitter (10), via which the signal sizes can be transmitted telematically to a neighboring receiver device (not shown)
  • the transmitted signal sizes are 3 signals, one from each of the two sensors and the difference between the two
  • Fig 2 shows the respiratonsche (a) as well as the mechanical cardio-respiratory (b) signals of a normal person with a tube with a size of 7.5 mm inside diameter.
  • a signal downwards means inspiration.
  • b has the The person arbitrarily closed the glottis and then no mechanical cardio-respiratory signals can be seen

Abstract

The invention relates to a tubus comprising a device for detecting the endotracheal pressure and the flow of breath. A sensor system is arranged in the wall of the tubus (1). Said system has practically no idle time and consists of a differential pressure sensor (3, 4) respectively which is introduced into the wall of the tubus (1), in the proximity to the tip thereof and close to the base (6) in a liquid-sealed manner. Both sensors (3, 4) are pneumatically coupled by means of a channel (7) in the wall of the tubus. The channel is connected to the atmosphere via an opening (8). The pressure sensors can be absolute pressure sensors or differential pressure sensors and have a high-end frequency of at least 1,000 Hz. In a preferred embodiment, the measuring signals which are individual values of the two sensors as well as the differential value are telemetrically transmitted by means of a transmitter (10) which is connected to the measuring device (9) on the tubus.

Description

Tubus mit Vorrichtung zur dynamischen Erfassung des endotrachealen DruckesTube with device for dynamic detection of endotracheal pressure
Gegenstand der Erfindung ist ein Sensor-Tubus zur dynamischen Erfassung des endotrachealen Druckes, des Atemstromes sowie mechanischer kardio- respiratonscher Signale mit den Merkmalen der PatentansprücheThe invention relates to a sensor tube for the dynamic detection of the endotracheal pressure, the respiratory flow and mechanical cardio- respiratonischen signals with the features of the claims
Sogenannte Tubusse werden in der Medizin als Verbindungsstuck dazu benutzt, um Menschen, die selbst nicht mehr atmen können, mit einer geeigneten Maschine (Respirator) künstlich zu beatmen. Die Überwachung der kunstlichen Beatmung erfolgt üblicherweise mit Hilfe von Druck- und Flusssensoren, die sich am Respirator selbst befindenSo-called tubes are used in medicine as a connector to artificially ventilate people who can no longer breathe themselves with a suitable machine (respirator). Artificial respiration is usually monitored with the help of pressure and flow sensors, which are located on the respirator itself
Dies hat bezüglich des Druckes den Nachteil, dass ein Lungendruck, sei es der endotracheale oder der alveolare, nicht richtig erfasst werden kann - insbesondere wahrend der Insufflation und insbesondere im Falle einer Verengung der Luftwege (bronchiale Obstruktion) -, weil der Gasstrom erhebliche Stromungswiderstande passieren muß und infolgedessen stromungsabhangig ein Druckabfall vorhanden ist Die genaue Kenntnis eines Lungendruckes, insbesondere seines Verlaufs wahrend des Atmungszyklus wäre aber deshalb sehr hilfreich, weil dann der Arzt die Beatmungsbedingungen mit Sicherheit optimieren konnte Denn einerseits darf ein Beatmungsdruck (auch momentan) nicht zu groß werden, weil dann die Gefahr der Verminderung des Herzzeitvolumens (durch Erhöhung des pulmonalen Perfusionswiderstandes) und /oder die Gefahr eines Barotraumas entsteht Andererseits mochte man die Lunge möglichst gut ventilieren, d h aufblähen Daher muß die Hohe des Beatmungsdruckes genau so groß gewählt werden, dass er maximal nutzt, aber noch nicht schadetRegarding the pressure, this has the disadvantage that a lung pressure, be it the endotracheal or the alveolar, cannot be recorded correctly - especially during insufflation and especially in the event of a narrowing of the airways (bronchial obstruction) - because the gas flow causes considerable flow resistance must and as a result there is a pressure drop depending on the current Exact knowledge of a lung pressure, in particular its course during the breathing cycle, would be very helpful because then the doctor was able to optimize the ventilation conditions with certainty because on the one hand a ventilation pressure (also at the moment) must not become too high, because then there is a risk of a reduction in cardiac output (due to an increase in pulmonary resistance to perfusion) and / or a risk of barotrauma On the other hand, one should ventilate the lungs as well as possible, that is, inflate. Therefore, the level of the ventilation pressure must be chosen so high that it is used to the maximum, but does not cause any damage
Aus solchen Gründen wäre eine dynamische Erfassung zumindest des endotrachealen Druckes an der Tubusspitze intensivmedizinisch von großer Wichtigkeit Hierzu gehört ebenfalls, dass die Druckanzeige schnell genug erfolgt, um auch Druckspritzen miterfassen zu können Eine 90% - Einstellzeit des Drucksignals von 1 ms wäre hierfür ausreichend Eine getreue quantitative Druckerfassung setzt auch voraus, dass das Sensor-System keine sogen Totzeit (Ansprechzeit) besitztFor such reasons, dynamic detection of at least the endotracheal pressure at the tip of the tube would be of great importance in intensive care medicine.This also means that the pressure is displayed quickly enough to be able to include pressure spraying.A 90% response time of the pressure signal of 1 ms would be sufficient quantitative pressure detection also requires that the sensor system has no so-called dead time (response time)
Bezüglich des Druckes, aber insbesondere bezuglich des Atemstroms, ist es von besonderem Nachteil, wenn sich die respirationschen Sensoren am Respirator befinden und nicht direkt am Patienten, d h am Tubus Denn wahrend der Entwohnungspenode, wenn die Beatmungsmaschine zeitweise abgehängt wird hat dann der Arzt keine messtechnischen Überwachung der Atmung mehr insbesondere der Ventilation, zu deren Ermittlung die kontinuierliche Registrierung des Atemstroms die Voraussetzung istWith regard to the pressure, but especially with regard to the respiratory flow, it is a particular disadvantage if the respiratory sensors are located on the respirator and not directly on the patient, i.e. on the tube, because during the weaning period, if the ventilation machine is temporarily disconnected, the doctor has no measurement technology Monitoring of the respiration, especially the ventilation, for the determination of which the continuous registration of the respiratory flow is a prerequisite
Auch in diesem Fall muß das Signal des Atemstroms eine ausreichend kurze 90%-In this case too, the signal of the respiratory flow must be sufficiently short 90% -
Einstellzeit von etwa 1 ms besitzen, damit atemzugsweise das in- und exspiratonsches Atemzugsvolumen durch eine kontinuierliche Integration richtig ermittelt werden könnenHave a response time of about 1 ms so that the inhaled and expiratory breath volume can be correctly determined by continuous integration
Zur Bestimmung des Atemstroms wäre eine zweite Druckmessuπg an der Basis des Tubus wünschenswert, sodaß der durch den Atemstrom verursachte Druckabfall als Maß für den respiratonschen Fluß dienen kann Damit böte sich auch die Möglichkeit beide Atemzugvolumina - das in- und expiratorische - über lange Zeit gegeneinander zu bilanzierenTo determine the respiratory flow, a second pressure measurement at the base of the tube would be desirable, so that the pressure drop caused by the respiratory flow can serve as a measure of the respiratory flow. This would also offer the possibility of both tidal volumes - the inspiratory and expiratory - against each other for a long time accounted for
Das fortlaufende Differenzsignal dieser beiden Volumina konnte dann zur Warnung vor einer Uberblahung der beatmeten Lunge genutzt werden, d h zur Warnung vor einem sogenannten VolutraumaThe continuous difference signal of these two volumes could then be used to warn of over-inflation of the ventilated lungs, ie to warn of a so-called volute trauma
Sind die Signale des Druckes und des Atemstroms nicht nur schnell sondern zugleich auch empfindlich genug, dann lassen sich zudem die sogenannten mechanischen kardio-respiratorischen Signale ermitteln, die wiederum insbesondere eine Funktionsdiagnostik des Bronchialsystems ermöglichenIf the signals of pressure and respiratory flow are not only fast but also sensitive enough, the so-called mechanical ones can also be used determine cardio-respiratory signals, which in turn enable functional diagnosis of the bronchial system
Die geschilderten Probleme wurden mit Hilfe eines sekundären Lumens in der Wand des Tubus zu losen versucht, welches von der Spitze des Tubus bis fast zu seiner Basis verlauft und hier über einen dünnen Schlauch seitlich an der Basis des Tubus nach außen gefuhrt wird ( EP 970309967 1997 1210 und US 960770014 1996 1219 ) Die erwähnten Patentschriften lehren, dass am Ende des dünnen seitlichen Schlauches ein Drucksensor zur Ermittlung des endotrachealen Druckes angeschlossen wird Zum Anschluß des zweiten Drucksensors - um den Atemstrom über eine Druckdifferenz zu bestimmen - dient ein weiterer Schlauch, der am Ansatzstuck des Tubus, am sogenannten Konnektor angeschlossen istThe problems described were attempted to be solved with the help of a secondary lumen in the wall of the tube, which runs from the tip of the tube to almost its base and is led outwards here via a thin tube at the base of the tube (EP 970309967 1997 1210 and US 960770014 1996 1219) The mentioned patents teach that a pressure sensor for determining the endotracheal pressure is connected to the end of the thin side tube. To connect the second pressure sensor - in order to determine the respiratory flow via a pressure difference - another tube is used Attachment of the tube, is connected to the so-called connector
Diese Anordnung hat zweierlei Nachteile Erstens kann dadurch dass der Druck über eine lange dünne Luftzuleitung gemessen wird, in diese - ganz besonders in die an der Spitze des Tubus - Flüssigkeit, sprich Bronchialsekret, gelangen und nicht nur den Endwert des Drucksignals verfalschen, sondern auch sein Einstellverhalten - Totzeit und Emstellzeit - verandern wodurch die Eichung auf zweifache Weise falsch werden kann Zweitens ist in diese Anordnung der Konnektor mit einbezogen, wodurch dieser vom Arzt nicht mehr unabhängig manipuliert werden kannThis arrangement has two disadvantages.Firstly, by measuring the pressure via a long thin air supply line, liquid - i.e. bronchial secretion - can get into it - especially the one at the tip of the tube - and not only falsify the final value of the pressure signal, it can also be wrong Adjustment behavior - dead time and reset time - change so that the calibration can be wrong in two ways. Secondly, the connector is included in this arrangement, which means that the doctor can no longer manipulate it independently
Diese entscheidenden Nachteile und vorstehend beschriebenen Aufgaben und Probleme werden erfindungsgemaß dadurch vermieden, dass erstens ein Drucksensor direkt in die Wand an der Spitze des Tubus eingebracht wird, sodass die Druckleitung nicht über eine Luftleitung zur Basis des Tubus erfolgen muß, und dass zweitens der Konnektor nicht mit in das Sensor-System einbezogen ist, sodass er beliebig ausgewechselt werden kannThese decisive disadvantages and the tasks and problems described above are avoided according to the invention in that firstly a pressure sensor is inserted directly into the wall at the tip of the tube, so that the pressure line does not have to be via an air line to the base of the tube, and secondly the connector does not is included in the sensor system so that it can be replaced as required
Durch den Einbau der Drucksensoren in die Wand des Tubus wird insbesondere erreicht, dass das Sensor-System keine Totzeit hat Durch die Verwendung schnell anzeigender Mikro-Drucksensoren mit einer oberen Grenzfrequenz von vorzugsweise mindestens 1000 Hz wird erreicht, dass die 90%-Eιnstellzeιt des Sensor-Systems kleiner als 1 ms bleibtBy installing the pressure sensors in the wall of the tube, it is achieved in particular that the sensor system has no dead time. The use of quickly indicating micro-pressure sensors with an upper limit frequency of preferably at least 1000 Hz means that the 90% setting time of the sensor System remains less than 1 ms
Abb 1 gibt den Längsschnitt des Sensor-Tubus schematisch wider Der Grundkorper des Tubus entspricht dem eines normalen Tubus (1 ), der nahe an der Spitze (5) im Falle eines Erwachsenen-Tubus mit einer Abdichtmanschette (2) versehen ist In der Innenwand nahe der Spitze befindet sich der eine Differenz- Drucksensor (3), der andere (4) in der Innenwand nahe der Basis (6) des Tubus, jedoch soweit davon entfernt, dass dort noch ein Konnektor eingesteckt werden kann Beide Drucksensoren (3,4) sind zum Lumen des Tubus flussigkeitsdicht angebracht Über einen Luftkanal (7), der in der Wand des Tubus (1) verlauft, sind die „Ruckseiten" beider Drucksensoren miteinander pneumatisch verbunden, dieser Kanal hat auch eine Öffnung (8) zur Atmosphäre, sodass beide Drucksensoren an ihrer Ruckseite pneumatisch gleichsam geerdet sind Dies ist nur erforderlich für den Fall, dass Differenzdruck-Sensoren verwendet werden, bei Verwendung von Absolutdrucksensoren entfallt der pneumatische Kanal (7) mit der Öffnung (8) Der pneumatische Kanal enthalt auch die Kabelverbindungen (1 1 ) der Drucksensoren zur Meßvorrichtung (9) Diese befindet sich am Basisende des Sensor-Tubus Sie enthalt vorzugsweise auch einen Sender (10), über den die Signalgroßen telemetnsch an ein (nicht gezeigtes) benachbartes Empfangergerat abgegeben werden könnenFig. 1 schematically shows the longitudinal section of the sensor tube The basic body of the tube corresponds to that of a normal tube (1), which is provided close to the tip (5) in the case of an adult tube with a sealing collar (2). In the inner wall near the tip there is a differential pressure sensor (3 ), the other (4) in the inner wall near the base (6) of the tube, but far enough away that a connector can be inserted there Both pressure sensors (3,4) are attached to the lumen of the tube in a liquid-tight manner Via an air duct ( 7), which runs in the wall of the tube (1), the "back sides" of both pressure sensors are pneumatically connected to each other, this channel also has an opening (8) to the atmosphere, so that both pressure sensors are pneumatically grounded on their back side. This is only required in the event that differential pressure sensors are used, when using absolute pressure sensors, the pneumatic channel (7) with the opening (8) is omitted. The pneumatic channel also contains the cable connections Binding (1 1) of the pressure sensors to the measuring device (9) This is located at the base end of the sensor tube. It preferably also contains a transmitter (10), via which the signal sizes can be transmitted telematically to a neighboring receiver device (not shown)
Bei den übermittelten Signalgroßen handelt es sich um 3 Signale je eines von jedem der beiden Sensoren sowie die Differenz beiderThe transmitted signal sizes are 3 signals, one from each of the two sensors and the difference between the two
Als Anwendungsbeispiel zeigt Abb 2 die respiratonschen (a) wie auch die mechanischen kardio-respiratorischen (b) Signale einer Normalperson mit einem Tubus der Große 7,5 mm Innendurchmesser In Teilbild a bedeutet ein Signal nach unten Inspiration In der Mitte der Registrierung b hat die Person willkürlich die Glottis verschlossen man sieht dann keine mechanischen kardio-respiratorischen Signale mehr As an application example, Fig 2 shows the respiratonsche (a) as well as the mechanical cardio-respiratory (b) signals of a normal person with a tube with a size of 7.5 mm inside diameter. In part a, a signal downwards means inspiration. In the middle of the registration b has the The person arbitrarily closed the glottis and then no mechanical cardio-respiratory signals can be seen

Claims

PatentansprϋchePatentansprϋche
1 Tubus mit Vorrichtung zur Erfassung des endotrachealen Drucks und des Atemstroms, dadurch gekennzeichnet, daß in der Tubuswand (1 ) nahe deren1 tube with device for detecting the endotracheal pressure and the respiratory flow, characterized in that in the tube wall (1) close to it
Spitze (5) und nahe der Basis (6) flussigkeitsdicht je ein Differenzdruck-Sensor (3,4) angeordnet ist und beide Sensoren (3,4) pneumatisch über einen Kanal (7) in der Tubuswand, der über eine Öffnung (8) mit der Atmosphäre verbunden ist, gekoppelt sindA differential pressure sensor (3, 4) and both sensors (3, 4) are arranged pneumatically via a channel (7) in the tube wall, which is connected via an opening (8) connected to the atmosphere
2 Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass die Drucksensoren eine obere Grenzfrequeπz von wenigstens 1000 Hz haben2 Device according to claim 1, characterized in that the pressure sensors have an upper limit frequency of at least 1000 Hz
3 Vorrichtung nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, daß die Drucksensoren (3,4) Absolutdruck-Sensoren sind3 Device according to one of claims 1 to 2, characterized in that the pressure sensors (3, 4) are absolute pressure sensors
4 Vorrichtung nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, daß die Drucksensoreπ (3,4) Differenzdruck-Sensoren sind4 Device according to one of claims 1 to 2, characterized in that the pressure sensors (3,4) are differential pressure sensors
5 Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass5 Device according to one of claims 1 to 4, characterized in that
Meßsignale der Drucksensoren über im Kanal (7) geführte Kabelverbindungen (1 1 ) einer Meßvorrichtung (9) zugeleitet werdenMeasurement signals from the pressure sensors are fed to a measuring device (9) via cable connections (11) guided in the channel (7)
6 Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet dass die Meßvorrichtung einen Sender (10) zur telemetrischen Übermittlung der Meßdaten umfaßt6 Device according to one of claims 1 to 5, characterized in that the measuring device comprises a transmitter (10) for the telemetric transmission of the measurement data
7 Vorrichtung nach einem Ansprüche 1 bis 6, dadurch gekennzeichnet, dass sowohl die Signale der beiden Drucksensoren als auch ihre Differenz telemetnsch übertragen wird7 Device according to one of claims 1 to 6, characterized in that both the signals of the two pressure sensors and their difference is transmitted telematically
8 Vorrichtung nach Anspruchel bis 7, dadurch gekennzeichnet, dass sie in Tubusse für Frühgeborene Säuglinge und Kinder implementiert ist 8 Device according to claim 7, characterized in that it is implemented in tubes for premature infants and children
PCT/EP2000/009472 1999-10-27 2000-09-28 Tubus comprising a device for dynamically detecting the endotracheal pressure WO2001030431A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU15143/01A AU1514301A (en) 1999-10-27 2000-09-28 Tubus comprising a device for dynamically detecting the endotracheal pressure

Applications Claiming Priority (2)

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DE19951578.6 1999-10-27
DE19951578A DE19951578C1 (en) 1999-10-27 1999-10-27 Trachea tube with integrated sensor system having 2 spaced difference or absolute pressure sensors attached to inside wall of tube

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