EP3114450A1 - Sensorblock, rohr sowie herstellungsverfahren - Google Patents

Sensorblock, rohr sowie herstellungsverfahren

Info

Publication number
EP3114450A1
EP3114450A1 EP15707379.2A EP15707379A EP3114450A1 EP 3114450 A1 EP3114450 A1 EP 3114450A1 EP 15707379 A EP15707379 A EP 15707379A EP 3114450 A1 EP3114450 A1 EP 3114450A1
Authority
EP
European Patent Office
Prior art keywords
tube
opening
sensor
pipe
port
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Withdrawn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
EP15707379.2A
Other languages
German (de)
English (en)
Inventor
Martin Baecke
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.)
Seleon GmbH
Original Assignee
Seleon GmbH
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 Seleon GmbH filed Critical Seleon GmbH
Publication of EP3114450A1 publication Critical patent/EP3114450A1/fr
Withdrawn legal-status Critical Current

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
    • G01F1/05—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 using mechanical effects
    • G01F1/34—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 using mechanical effects by measuring pressure or differential pressure
    • G01F1/36—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 using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
    • G01F1/40—Details of construction of the flow constriction devices
    • G01F1/46—Pitot 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
    • A61M16/021—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes operated by electrical means
    • 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
    • A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
    • A61M16/0816—Joints or connectors
    • 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
    • A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
    • A61M16/0816—Joints or connectors
    • A61M16/0841—Joints or connectors for sampling
    • A61M16/085—Gas sampling
    • 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
    • A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
    • A61M16/0816—Joints or connectors
    • A61M16/0841—Joints or connectors for sampling
    • A61M16/0858—Pressure sampling ports
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/18—Supports or connecting means for meters
    • G01F15/185—Connecting means, e.g. bypass conduits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/0007—Fluidic connecting means
    • G01L19/0023—Fluidic connecting means for flowthrough systems having a flexible pressure transmitting element
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/0007—Fluidic connecting means
    • G01L19/003—Fluidic connecting means using a detachable interface or adapter between the process medium and the pressure gauge
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/0007—Fluidic connecting means
    • G01L19/0038—Fluidic connecting means being part of the housing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/14—Housings
    • G01L19/149—Housings of immersion sensor, e.g. where the sensor is immersed in the measuring medium or for in vivo measurements, e.g. by using catheter tips
    • 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
    • A61M16/12—Preparation of respiratory gases or vapours by mixing different gases
    • 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
    • A61M2202/00—Special media to be introduced, removed or treated
    • A61M2202/02—Gases
    • A61M2202/0208—Oxygen
    • 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
    • A61M2205/75—General characteristics of the apparatus with filters
    • A61M2205/7545—General characteristics of the apparatus with filters for solid matter, e.g. microaggregates
    • 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
    • A61M2207/00—Methods of manufacture, assembly or production

Definitions

  • the field of the invention are ventilators, in particular sensor components for this purpose.
  • the invention relates to sensor blocks according to the preamble of patent claim 1, 5, a pipe with a sensor, tubes according to the preambles of claims 12 to 14 and a manufacturing method.
  • a microsystem is a miniaturized device, assembly, or component whose components are micron-sized and cooperate as a system.
  • a microsystem consists of one or more sensors, actuators and control electronics on a substrate or chip.
  • Microsystems technology is the study of the development of microsystems and the techniques for their realization.
  • MEMS and MOEMS are common in the English language for micro-15 electro-mechanical systems and micro-opto-electro-mechanical systems.
  • micromachines In Asian, primarily Japanese, publications, however, there is also the extended name micromachines.
  • microsystems The use of microsystems is conceivable and useful wherever sensors, actuators and electronics work together. Medical devices as well as products from the fields of safety technology, sports, life sciences and logistics can become more versatile, simpler, smarter, smaller and more efficient with the help of microsystems.
  • differential pressure sensors called SDP1 108 and SDP2108 from SENSIRON AG. Since these sensors have a thermal sensor element, they are actually flow sensors that measure the low gas flow through a capillary. Within the scope of this application, as differential pressure sensors according to the data sheet of SDP1 108 and SDP2108, flow sensors are also to be used.
  • thermal mass flow sensors which measure the pressure drop across a capillary.
  • Molded Interconnect Devices English for: injection molded circuit carriers
  • short MID electronic components are referred to, in which metallic conductors are applied to injection-molded plastic carrier.
  • Essential fields of application for the MID technology are automotive engineering, industrial automation, medical technology, the household appliance industry, telecommunications technology, measurement and analysis technology, and aerospace.
  • Rationalization potential lies in the reduction of the number of parts through material savings and the shortening of the process chains. Furthermore, the reliability can be increased by reducing the assembly steps.
  • MID metallized plastic part
  • a CPAP device applies by means of a compressor, preferably via a humidifier, via a hose and a nasal mask a positive overpressure up to about 30 mbar in the respiratory tract of the patient. This overpressure is intended to ensure that the upper airways remain fully open during sleep during the entire night and thus no obstructive respiratory disorders (apnea) occur (DE 198 49 571 A1).
  • sterile filters are commercially available. They consist for example of a porous plastic body made of polypropylene or Teflon (PTFE, polytetrafluoroethylene) to intercept microorganisms. Typical bacteria can be from 0.2 to 4 ⁇ large. Viruses are smaller than 0.3 ⁇ and bacteriophages can even be up to 0.01 ⁇ small.
  • PTFE Teflon
  • US 7,814,907 B2 describes a system for applying gases for ventilators.
  • a blower pushes air through a humidification chamber and a breathing duct to a patient.
  • the breathing duct is interrupted by, for example, a T-shaped tube having a connection for a sensor housing.
  • the sensor in the sensor housing can measure air humidity, temperature and / or flow.
  • a filter for example a SYMPATEX® film, is provided between the interior of the breathing duct, in particular the interior of the tube, and the sensor.
  • the filter should keep dust, steam, bacteria and viruses away from the sensor.
  • the filter can be glued to the tube.
  • the connection between the tube and sensor housing can be made by a thread, a snap fastener, a bayonet mount or a silicone gasket.
  • the sensor housing itself can be located in the tube and itself consist of a tube whose ends are closed by filters.
  • the sensor block can be easily mounted on the tube.
  • This is when mounting z. B. of CPAP devices advantageous.
  • it allows the use of tubes as disposable while reusing the relatively expensive sensor block.
  • the openings of the tube are usefully closed with sterile filters. Elongated projections on the staple parts that extend parallel to the axis of the tube and / or corresponding grooves in the tube allow for reproducible positioning of the sensor block on the tube.
  • differential pressure sensor advantageously allows the use of pitot tubes or orifices for the correct-sign measurement of the gas flow in the pipe.
  • a double pitot tube in contrast to a simple pitot tube or a Prandtl pitot tube, also allows the correct measurement of the gas flow regardless of the direction of flow in the tube.
  • a connection for a hose advantageously makes it possible to supply additional gases, in particular oxygen, or to draw samples from the respiratory air.
  • a differential pressure sensor which measures the pressure difference between the port of the hose and the interior of the pipe or the environment of the pipe, advantageously enables a flow measurement of the gas supplied or withdrawn via the port. This flow measurement becomes more accurate when the port is connected to the interior of the pipe via a capillary port.
  • the flow measurement in the tube may be more accurate when measuring the differential pressure at a diaphragm (86) of porous material than when using a double pitot tube. The reason for this is the flow-dependent flow profile in the pipe.
  • a sensor block and a tube can be designed in an advantageous manner so that both can be produced with a single mask set in MID technology, at least partially the same injection molding tools and at least partially the same control program parts.
  • FIG. 1 shows an inventive flow tube of a CPAP device.
  • FIG. 2 is an exploded view of the flow tube shown in FIG. 1;
  • FIG. 3 shows an exploded view of a sensor block according to the invention shown in FIGS. 1 and 2;
  • FIG. 4 shows a cross section through a second embodiment of a sensor block according to the invention and a flow tube according to the invention
  • FIG. 5 shows a longitudinal section through a third embodiment of a sensor block according to the invention and a flow tube according to the invention
  • Fig. 6 shows a cross section through the third embodiment of a sensor block according to the invention and a device according to the invention
  • Fig. 7 shows a cross section through a fourth embodiment of a flow tube according to the invention.
  • Fig. 8 shows a longitudinal section through a fifth embodiment of a flow tube according to the invention.
  • FIG. 9 shows a cross section through a sixth embodiment of a flow tube according to the invention.
  • FIG. 10 shows a cross section through a seventh embodiment of a flow tube according to the invention.
  • Fig. 1 shows an inventive flow tube 2 for a CPAP device.
  • the front, diffused end of the flow tube 2 is fixed in a wall of the CPAP device.
  • On top of the flow tube 2 sits a sensor block 1.
  • the sensor block 1 may include sensors for flow and / or pressure measurement in the flow tube 2.
  • Fig. 2 shows the removed sensor block 1.
  • Fig. 3 shows the detail of Fig. 2 with the sensor block 1.
  • the sensor block 1 is C-shaped.
  • the two ends are referred to as clip parts 1 1 and 12.
  • the sensor block 1 with its two clamp parts 11 and 12 comprises slightly more than half or, with In other words, a little more than 180 ° of the flow tube 2.
  • each staple part 1 1, 12 at its end an elongated projection 13 and 14, respectively.
  • Each elongate projection 13 and 14 engages in a groove 15 on the flow tube 2 a. In FIGS. 1 and 2, only the groove 15 is shown on the side of the flow tube 2 facing the observer.
  • a pitot tube 6 Below projects out of the sensor block a pitot tube 6 out.
  • the pitot tube 6 protrudes through the opening 8 into the interior of the flow tube 2 into it.
  • the construction of the pitot tube 6 is similar to the construction of the pitot tube 26 shown in FIG. 5 with two openings, wherein an opening in the flow direction 9 and an opening opposite to the flow direction 9 is directed. In the case of the flow tube 2, the flow direction 9 is directed towards the breathing tube connection 3.
  • a defined leak is provided in or near the respiratory mask, through which the exhaled carbon dioxide is washed out. Averaged over a breath so results in a net flow from the ventilator to the respiratory mask out in the direction of the flow direction 9. Nevertheless, when exhaling air to the CPAP device against the flow direction 9 are pushed back.
  • the flow tube 2 and / or the sensor block 1 are made of an elastic material, so that the sensor block 1 can be plugged onto the flow tube 2 several times and removed again.
  • the sensor block 1 is implemented in MID technology. On a plastic body conductor tracks 7, for example, copper and electronic components are attached to the conductor tracks.
  • the components for a preamplifier 51 and a further electrical component 52 are shown in FIG.
  • the attachment takes place for example by soldering, in particular wave soldering (English: flow soldering) or gluing, for example, with silver conductive adhesive.
  • This type of attachment is not only mechanical in nature, but also ensures electrical contact between the electronic components and the tracks 7.
  • differential pressure sensor 4 and a cover 5 is mounted on the sensor block 1.
  • differential pressure sensors and flow sensors in particular thermal mass flow sensors, understood that measure the pressure drop across a capillary such as the sensors SDP1 108 and SDP2108.
  • the central part of the sensor block 1 is stiffer than the clamp parts 11 and 12. This can be achieved by making the central part thicker and / or thicker. or of a stiffer material than the staple parts 1 1, 12 consists. If the clamp members 11, 12 comprise more than 180 ° of the flow tube 2, the grooves 15 and the projections 13, 14 are not
  • the sensor block 1 may also include less than 180 ° of the flow tube 2.
  • the projections 13 and 14 a hook-shaped cross-section
  • the sensor block 1 only a small angular range, ie 60 °, 30 ° or less of the flow tube 2 comprises.
  • FIG. 4 shows a cross section through a second embodiment of a sensor block 101 according to the invention and a flow tube according to the invention
  • the sensor block 101 has on the outside ribs 115 and 16 which facilitate the removal and attachment of the sensor block 101 to the flow tube 102.
  • the clamp members 1 1 1 and 1 12 have no projections and the flow tube 102 also
  • the sensor block 101 includes about 240 ° of the flow tube 102.
  • the sensor block 101 comprises a hose connection 141 for a hose 142.
  • the flow in the hose 142 is measured by means of a flow sensor. How the flow measurement is carried out will be explained with reference to the sections shown in FIGS. 9 and 10.
  • the tube 142 may be for supplying oxygen or
  • the tube 142 may also be used to draw samples, in particular from exhaled gas.
  • an opening 149 is attached below the hose connection 141, the pneumatically connected to the hose connector 141. Sealing ring 124 prevents a pneumatic connection to the environment.
  • the sensor block 101 shown in FIG. 4 can be expanded by a second differential pressure sensor 4 and a pitot tube 6, similar to that shown in FIG. 5.
  • the sensor block 1 can also be supplemented by a second differential pressure sensor and a hose connection 141, similar to that shown in FIG. 5.
  • FIG. 5 shows a longitudinal section through a third embodiment of a sensor block according to the invention with an MID component 21 and a cover 25 as well as a flow tube 22 according to the invention.
  • FIG. 5 essentially represents a combination of those shown in FIGS. 1-3 as well as in FIG. 4
  • the gas space in the flow tube 22 through the sterile filter 28, 38 and 48 separated from the gas space in the sensor block 1.
  • both inspired and exhaled air flows through the flow tube 22.
  • the flow direction 9 is thus arbitrarily selectable parallel to the axis of the flow tube 22 and regardless of the choice come positive and negative gas flows, ie gas flows in the flow direction 9 or against the flow direction 9 before. In terms of amount, the positive and negative gas flows are about the same size.
  • the double pitot tube 26 is symmetrical to a plane perpendicular to the flow direction 9.
  • the channel 56 is pneumatically connected via a sterile filter 38 to the opening 39, wherein the sealing ring 37 causes the seal against the environment.
  • the pressure in port 46 is supplied via port 66 through port 29 to the other input of differential pressure sensor 24.
  • the channels 56 and 66 extend directly below the sterile filter 28 and 38, whose area is made as large as possible. As a result, the flow resistance is kept low by the sterile filter.
  • the channel 66 is pneumatically connected via a sterile filter 28 to the opening 29 and sealed by a sealing ring 27 against the environment. It is known to those skilled in the art that based on the Bernoulli equation, the flow velocity can be calculated from the signal provided by the differential pressure sensor 24. In doing so, the Bernoulli equation is parameterized, ie adapted to the specific case of measurement. The sign of the gas flow results from the sign of the signal supplied by the differential pressure sensor 24.
  • the MID component 21 furthermore has a hose connection 41 for a hose 42.
  • oxygen can be forced from the tube 42 into the flow tube 22 via another sterile filter 48 and a capillary opening 49.
  • Another differential pressure sensor 44 is provided to measure the pressure differential across the capillary port 49.
  • the first pressure port of the differential pressure sensor is pneumatically connected via the opening 69 to the interior of the hose connection 41 and sealed by the sealing ring 47 from the environment. Since the second pressure port of the differential pressure sensor 44 is connected via the opening 59 to the environment and not to the interior of the flow tube 22, the differential pressure sensor 44 does not measure the differential pressure at the capillary opening 49.
  • the pressure in the flow tube 22 only deviates by a few tens mbar from the ambient pressure.
  • the pressure difference measured by the differential pressure sensor 44 is large compared to some 10 mbar, the pressure difference between the ambient pressure and the pressure in the flow pipe 22 can be neglected.
  • the differential pressure between the interior of the flow tube 22 and the environment is known, so that the pressure measured by the differential pressure sensor 44 can be corrected by this pressure difference.
  • the capillary opening 49 may be expanded similar to the channels 56 and 66 below the sterile filter 48. This may be particularly advantageous when drawing gas samples through the tube 42.
  • a further opening in the flow tube 22 may be provided below the opening 59. Both openings are pneumatically connected in this embodiment via a sealing ring.
  • sealing rings 27, 37 and 47 it is also possible to use a single seal 10, for example consisting of soft material, which for the application in FIG. 5 would have to have three openings separated by sealing material.
  • the MID component 21 is manufactured in MID technology. For example, therefore, the solder joints 34 and the conductors 33 of the electrical line 32 15 are shown, via which the differential pressure sensors 24 and 44 are supplied with electrical energy and read out.
  • a cover 25 protects the components on the MID component 21.
  • FIG. 6 shows a cross section along the line A-A in FIG. 5 with the MID component 21, the flow tube 22, the double pitot tube 26, the sterile filter 20, the differential pressure sensor 24, preamplifier 51 and an electronic component 52.
  • FIG. 7 shows a flow tube 72 manufactured in MID technology and comprising the double pitot tube 76.
  • the MID component 21 shown in FIGS. 5 and 6 is part of the embodiment shown in FIG.
  • Mask set and injection molds can be summarized under the generic term tool set.
  • FIG. 8 shows a longitudinal section through a fifth embodiment of a flow tube 72 according to the invention.
  • a pressure difference at a porous diaphragm 86 is generated in a known manner by a gas flow in a flow tube 72.
  • the flow direction 9 is determined from left to right.
  • the pressure difference is supplied via two openings 79 and 10 89 to the two terminals of a differential pressure sensor 24.
  • the flow tube 72 is implemented in MID technology.
  • the double pitot tube 26 may also be replaced by a porous shield 86 in the embodiment shown in FIG.
  • FIGS. 9 and 10 show alternative embodiments for the left part of the flow tube 22 shown in FIG. 5 along the line B-B.
  • the flow tube 72 is designed as in FIGS. 7 and 8 in MID technology.
  • no hose is attached to the hose connector 81.
  • One terminal of the differential pressure sensor 84 is above the
  • Hose connection 81 pneumatically connected to the environment.
  • the other terminal of the differential pressure sensor 84 is connected to the interior of the flow tube 72 via the opening 99.
  • the differential pressure sensor 84 thus measures the pressure difference between the interior of the flow tube 72 and the environment.
  • a hose 82 is plugged onto the hose connection 81 and a capillary opening 109 is provided as a bypass to the differential pressure sensor 84. It is thus possible via the tube 82 to supply additional gases, in particular oxygen, to the flow tube 72 or to draw gas samples from the flow tube 72. By way of the differential pressure at the capillary opening 109, the gas flow from the hose 82 into the flow pipe 72 and vice versa can be determined.
  • the flow tubes 72 shown in FIGS. 9 and 10 can be produced with very similar injection molding tools, which can only be replaced by a single injection molding tool different stamp different.
  • the stamp for producing the flow tube 72 shown in FIG. 9 is somewhat shorter, because the cavity in the hose connection 81 is also somewhat shorter.
  • the punch for making the flow tube 72 shown in Fig. 10 is slightly longer to make the capillary opening 109 as well.
  • a hose 82 can also be plugged onto the hose connection 81 in the embodiment shown in FIG. 9, so that either gases are supplied to the interior of the flow pipe 72 can be drawn or gas samples from the interior of the flow tube 72 can be pulled.

Landscapes

  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Biomedical Technology (AREA)
  • Veterinary Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Anesthesiology (AREA)
  • Pulmonology (AREA)
  • Emergency Medicine (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Measuring Fluid Pressure (AREA)
  • Measuring Volume Flow (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

Die Erfindung betrifft einen Sensorblock (1) zum Messen von Fluidfluss oder Druck in einem Rohr (22). Der Sensorblock (1) umfasst einen Sensor (4, 24) und ein Gehäuse. Das Gehäuse weist einen elastischen Klammerteil (11, 12) auf, der so geformt ist, das er auf das Rohr in radialer Richtung aufgesteckt werden kann und aufgesteckt einen Teil des Rohres umfasst. Darüber hinaus betrifft die Erfindung ein Rohr (72), das mittels MID-Technologie hergestellt ist. Das Rohr (72) umfasst Leiterbahnen (77) und einen Sensor (24, 84), der fest mit dem Rohr (72) verbunden ist. Darüber hinaus betrifft die Erfindung ein Rohr (2; 22) mit einer Öffnung (49, 36, 46, 56, 66) in der Rohrwand, die mit einem Sterilfilter (28, 38, 48) verschlossen ist. Das Rohr (2; 22) weist ferner zwei längliche Nuten (15) zur lösbaren Befestigung eines Sensorblocks (1) auf. Die Erfindung betrifft ferner ein Rohr (72), das ein doppeltes Pitotrohr (6) aufweist. Die Erfindung betrifft ferner ein Rohr (72) mit einer Blende (86) aus porösem Material. Vor und nach der Blende (86) ist je eine Öffnung (79, 89) in der Rohrwand angebracht. Beide Öffnungen (79, 89) sind durch Sterilfilter verschlossen. Ferner betrifft die Erfindung ein Herstellungverfahren, bei dem sowohl ein erfindungsgemäßer Sensorblock (1) als auch ein erfindungsgemäßes Rohr (2; 22; 72) mit dem gleichen Maskensatz, einem gleichen Spritzgusswerkzeug und/oder einem gleichen Steuerprogrammteil hergestellt werden.
EP15707379.2A 2014-03-04 2015-03-03 Sensorblock, rohr sowie herstellungsverfahren Withdrawn EP3114450A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14157563.9A EP2916120A1 (fr) 2014-03-04 2014-03-04 Bloc de capteur, tube et procédé de fabrication
PCT/EP2015/054374 WO2015132239A1 (fr) 2014-03-04 2015-03-03 Sensorblock, rohr sowie herstellungsverfahren

Publications (1)

Publication Number Publication Date
EP3114450A1 true EP3114450A1 (fr) 2017-01-11

Family

ID=50193324

Family Applications (2)

Application Number Title Priority Date Filing Date
EP14157563.9A Withdrawn EP2916120A1 (fr) 2014-03-04 2014-03-04 Bloc de capteur, tube et procédé de fabrication
EP15707379.2A Withdrawn EP3114450A1 (fr) 2014-03-04 2015-03-03 Sensorblock, rohr sowie herstellungsverfahren

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP14157563.9A Withdrawn EP2916120A1 (fr) 2014-03-04 2014-03-04 Bloc de capteur, tube et procédé de fabrication

Country Status (4)

Country Link
US (1) US20170074695A1 (fr)
EP (2) EP2916120A1 (fr)
JP (1) JP2017508577A (fr)
WO (1) WO2015132239A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11090456B2 (en) * 2015-05-08 2021-08-17 Koninklijke Philips N.V. Liquid removal in a patient interface assembly
US10472072B2 (en) * 2015-11-25 2019-11-12 Hamilton Sundstrand Corporation Supply tube for sensor
SG11201901186TA (en) * 2016-10-11 2019-03-28 Fisher & Paykel Healthcare Ltd An integrated sensor assembly of a respiratory therapy system
EP3524305A1 (fr) 2018-02-12 2019-08-14 Fritz Stephan GmbH Appareil respiratoire ainsi que procédé de commande et d'essai
EP3550291A1 (fr) * 2018-04-05 2019-10-09 Georg Fischer Rohrleitungssysteme AG Dispositif de fixation pour appareils de mesure sur des tubes
US20210231476A1 (en) * 2018-07-27 2021-07-29 Imtmedical Ag Respiratory flow sensor
CA3119471A1 (fr) * 2018-11-19 2020-05-28 Gould Instruments Pty Ltd Dispositif de test pour dispositifs de prevention de reflux
KR102039984B1 (ko) * 2019-05-10 2019-11-04 브레싱스 주식회사 호흡 측정 장치
CN115282465B (zh) * 2022-08-16 2023-10-10 心擎医疗（苏州）股份有限公司 基于血液压力的在线式即时反馈控制的体外式血泵系统

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI82367C (fi) * 1988-02-11 1991-03-11 Instrumentarium Oy Till intubationsroer kopplad spirometer och provtagningsfoerbindning i gasanalysator.
US5081866A (en) * 1990-05-30 1992-01-21 Yamatake-Honeywell Co., Ltd. Respiratory air flowmeter
JPH05164638A (ja) * 1991-12-10 1993-06-29 Toray Ind Inc 圧力センサ
JPH07139977A (ja) * 1993-11-19 1995-06-02 Tokyo Gas Co Ltd コーナータップ式絞り流量計における差圧伝送器設置機構
US5676132A (en) * 1995-12-05 1997-10-14 Pulmonary Interface, Inc. Pulmonary interface system
FI102453B (fi) * 1997-03-17 1998-12-15 Instrumentarium Oy Parannettu mittausanturi ja järjestelmä kaasun virtausmittausta varten
JP4015751B2 (ja) * 1998-04-30 2007-11-28 株式会社技術開発総合研究所 差圧式流量計
DE19833991A1 (de) * 1998-07-29 2000-02-10 Draeger Sicherheitstech Gmbh Vorrichtung zum Nachweis eines gasförmigen Bestandteiles in einem Gasstrom
DE19849571B4 (de) 1998-10-27 2004-12-02 Map Medizin-Technologie Gmbh Beatmungsgerät zur Zufuhr eines Atemgases zu einem Patienten unter einem auf den Patienten abgestimmten Behandlungsdruck
US7168334B1 (en) * 2000-05-30 2007-01-30 Gambro Lundia Ab Arrangement for measuring a property of a fluid present in a tube
US20020191673A1 (en) * 2001-06-15 2002-12-19 Chih-Hsiung Lee Temperature display equipped container clamp
ATE435677T1 (de) 2002-11-01 2009-07-15 Fisher & Paykel Healthcare Ltd System zum nachweis der abgabe von gasen an einen patienten
DE10253935B3 (de) 2002-11-19 2004-03-25 Seleon Gmbh Verfahren zum Steuern des von einem CPAP-Gerät gelieferten Drucks, CPAP-Gerät sowie Speichermedium
ATE411520T1 (de) * 2005-10-25 2008-10-15 Hoffmann La Roche Analysegerät zur analyse einer probe auf einem testelement
EP1785708B1 (fr) * 2005-11-09 2018-01-03 TDK-EPC AG & Co. KG Composant de capteur de pression

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2015132239A1 *

Also Published As

Publication number Publication date
EP2916120A1 (fr) 2015-09-09
JP2017508577A (ja) 2017-03-30
WO2015132239A1 (fr) 2015-09-11
US20170074695A1 (en) 2017-03-16

Similar Documents

Publication Publication Date Title
WO2015132239A1 (fr) Sensorblock, rohr sowie herstellungsverfahren
DE19617738C1 (de) Atemstromsensor
EP1989523B1 (fr) Procédé de fabrication d'une unité de mesure de la pression d'un fluide, et composant destiné à être utilisé dans ladite unité.
EP3669189B1 (fr) Ensemble capteur comprenant un capteur de pression et un capteur de gaz thermique
EP2221079B1 (fr) Dispositif de distribution d'un liquide pharmaceutique sous forme atomisée
DE102007023714B4 (de) Pneumatik- und/oder Fluidikmodul, Pneumatik und/oder Fluidiksystem und Verfahren zur Herstellung eines Pneumatik- und/oder Fluidikmoduls
DE102004017403B4 (de) Messvorrichtung zur Messung des Volumenstromes eines Gases, dessen Strömungsrichtung sich umkehren kann
EP1408313A2 (fr) Capteur de débit massique thermique
WO2019057621A1 (fr) Capteur de débit de gaz pour dispositif respiratoire, présentant une vulnérabilité réduite à la présence d'humidité dans le boîtier de capteur
DE202012013442U1 (de) Pneumatische Komponente zur Probenahme für einen Gassensor
DE102017210124A1 (de) Luftleitsystem und Messsystem zum Messen von wenigstens einem Parameter eines aus einem Luftausströmer austretenden Luftstroms
EP3432962B1 (fr) Système pour mesurer le débit volumique d'un patient sous ventilation artificielle
DE102009015928A1 (de) Verfahren und Vorrichtung zur Anreicherung von Atemgas mit Sauerstoff
WO2008148652A2 (fr) Boîtier à montage rapide pour capteurs en contact avec l'air
EP4041358B1 (fr) Raccord destiné à un système de ventilation de patient
DE102013114608A1 (de) Relativdrucksensor
WO2019185492A1 (fr) Capteur de débit par pression différentielle pour dispositifs respiratoires à résistance à l'écoulement améliorée à abattant en plusieurs parties
EP3714822B1 (fr) Dispositif de commande de fluide pour un appareil médical
WO2020104996A1 (fr) Dispositif de transport comprenant un actionneur et une couche de séparation
DE102011003007A1 (de) Leiterplatte mit Überdruckventil, Insufflator
EP2002411B1 (fr) Détecteur de fumée
DE102017106404A1 (de) Einrichtung mit Einrichtung zum Ermitteln einer, insbesondere geometrischen, Eigenschaft der Einrichtung
WO2020021492A1 (fr) Capteur de débit respiratoire
DE102019205938A1 (de) Fluidleitungssystem zur Führung von Fluid, insbesondere für ein Kraftfahrzeug, sowie Klimagerät für ein Kraftfahrzeug insbesondere ein HVAC-Gerät
DE102014119146A1 (de) Sensorvorrichtung für die maschinelle Beatmung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20160823

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20200103

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20200218