WO2011107309A1 - Dispositif capteur et procédé permettant d'utiliser le dispositif capteur - Google Patents

Dispositif capteur et procédé permettant d'utiliser le dispositif capteur Download PDF

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Publication number
WO2011107309A1
WO2011107309A1 PCT/EP2011/051037 EP2011051037W WO2011107309A1 WO 2011107309 A1 WO2011107309 A1 WO 2011107309A1 EP 2011051037 W EP2011051037 W EP 2011051037W WO 2011107309 A1 WO2011107309 A1 WO 2011107309A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensor device
hollow enclosure
human body
air
air chamber
Prior art date
Application number
PCT/EP2011/051037
Other languages
English (en)
Inventor
Manish Birla
Archana Kalyansundar
Puneeth Kumar
Kiran Nagaraj
Umesh Shaha
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2011107309A1 publication Critical patent/WO2011107309A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B7/00—Instruments for auscultation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/43—Detecting, measuring or recording for evaluating the reproductive systems
    • A61B5/4306—Detecting, measuring or recording for evaluating the reproductive systems for evaluating the female reproductive systems, e.g. gynaecological evaluations
    • A61B5/4343—Pregnancy and labour monitoring, e.g. for labour onset detection
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/683—Means for maintaining contact with the body
    • A61B5/6831—Straps, bands or harnesses
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/02—Measuring pulse or heart rate
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/08—Detecting organic movements or changes, e.g. tumours, cysts, swellings
    • A61B8/0866—Detecting organic movements or changes, e.g. tumours, cysts, swellings involving foetal diagnosis; pre-natal or peri-natal diagnosis of the baby

Definitions

  • a sensor device and a method for using the sensor device The present invention relates to a sensor device and a method for using the sensor device for detecting sounds from the human body, such as a fetal heart beat.
  • the health of a person may be assessed by detecting or listening to the internal sounds of the human body, which is known as auscultation. Auscultation is performed for the purpose of examining the circulatory system, the respiratory system, as well as the gastrointestinal system. Listening to sounds from the human body is used for diagnostic purposes as well as for monitoring health of a person. Typically, listening to sounds from the human body is done by a
  • Continuous monitoring is basically determining and routinely performing health assessment of the person on an
  • Continuous monitoring systems are essential for measuring blood-pressure levels, heart rate, fetal heart rate and so on.
  • Currently available systems for continuous fetal heart rate monitoring are Doppler-ultrasound based. These systems include a sensor device that sends an ultra-sound signal to a part in the human body and detects the reflected sound signal from the human body to assess health of the fetus. This type of sensor device is also known as a transceiver. This sensor device is held at a specific location on a human body via use of belts or straps, which are cumbersome and make the person immobile .
  • the object is achieved by providing a sensor device according to claim 1 and a method for using said sensor device
  • the sensor device includes a hollow enclosure having a circumferential opening.
  • circumferential opening are adapted such that when the circumferential opening is placed in contact with a human body an air pressure less than a surrounding air pressure is maintainable inside the hollow enclosure.
  • the pressure inside the hollow enclosure is achieved via means for creating air pressure difference between the hollow enclosure and the surroundings.
  • a suction effect is generated which securely attaches the sensor device onto the human body for a continuous monitoring of the sound from the human body with a microphone.
  • the sensor device is
  • the means for creating the air pressure difference between the hollow enclosure and the surroundings includes an elastic wall of the hollow enclosure.
  • the elastic wall of the hollow enclosure enables the hollow enclosure to contract and attach securely to the human body when it is pushed onto the human body thereby making the sensor device cost-effective.
  • the elastic wall of the hollow enclosure is elastic around the circumferential opening. This enables the hollow enclosure to adapt to the shape of the human body providing enhanced sealing.
  • the hollow enclosure comprises a conical shape. The conical shape enables the hollow enclosure to be easily compressible when pushed onto the human body.
  • the hollow enclosure comprises silicone. Silicone is very elastic and durable; hence it can be used several times without losing its elasticity or becoming porous .
  • the means for creating the air is very elastic and durable.
  • the pressure difference includes a pump connected to the hollow enclosure.
  • the pump is configured to extract air from the hollow enclosure.
  • the pump is easy to use and allows a high pressure difference between the hollow enclosure and the surroundings thereby attaching the sensor device securely to the human body.
  • the microphone is arranged in an acoustic connection with the air inside the hollow enclosure. This enables the microphone to capture sounds from the human body and not the sounds from the surroundings.
  • the acoustic connection is formed by an air chamber separated from the hollow enclosure by a diaphragm.
  • the air chamber transmits the sound captured by the diaphragm to the microphone without weakening the sound. This is achieved due to the vibration of the diaphragm which creates sound in form of air pressure waves that travel through the air chamber to the microphone.
  • the air chamber has a monotonously reducing cross section along an axis of the diaphragm.
  • the reducing cross section of the air chamber is able to guide the sound towards the microphone and also amplify the sound, thus increasing the overall sensitivity of the sensor device.
  • the air chamber comprises an inner layer formed from stainless steel.
  • Use of stainless steel prevents sound from the surroundings to enter the air chamber thereby preventing disturbance arising due to
  • the hollow enclosure, the air chamber and the microphone are arranged along an axis
  • this arrangement allows a proper detection of the sound since the microphone is on an axis towards the human body. Additionally, this arrangement provides a compact design for the sensor device.
  • the sensor device further comprises one or more air vents.
  • the air vents advantageously help in
  • the air vents also aid in ambient noise cancellation that may be generated from the human body.
  • a fetal monitoring system comprises a sensor device for sensing a heart beat of a fetus, a fetal monitoring processing unit for processing signals from the sensor device to generate heart beat data.
  • the fetal monitoring system comprises a fetal monitoring display device for displaying heart beat data.
  • the displayed heart beat data is analyzed by a doctor to monitor the health of the fetus.
  • FIG. 1 is a schematic diagram of an exemplary sensor device interfaced to a processing unit which is connected to a display unit;
  • FIG. 2 is a side view of a sensor device with a pump;
  • FIG. 3 is a side view of the exemplary sensor device of FIG. 1;
  • FIG. 4 is a bottom view of another embodiment of the sensor device with air vents; and
  • FIG. 5 is a diagram depicting a fetal monitoring system having an interface with the sensor device.
  • Embodiments of the present invention described below relate to a sensor device, a fetal monitoring system incorporating the sensor device and a method of using the sensor device for detecting sounds from the human body.
  • a sensor device may be used to detect sounds from the body of an animal.
  • Detection of internal sounds from the human body is important for diagnosis of health of a person. In case of a pregnant woman, health of a fetus needs to be monitored closely. Heart rate of a fetus is a valuable indicator to assess the health of fetus in a pregnant woman. Measurement of fetal heart rate is particularly critical during term or the last month of pregnancy and doctors frequently check this rate to detect fetal distress.
  • continuous monitoring systems such as fetal heart rate monitoring systems are Doppler-ultrasound based. These systems have an ultra-sound source that emits sounds in ultrasonic frequency range which can adversely affect the health of the fetus.
  • an exemplary sensor device for detecting sounds from the human body, which is also securely attachable to the human body is presented.
  • FIG. 1 is a diagrammatic illustration of an exemplary sensor device 2 for detecting sounds from the human body 3 according to an embodiment of the present invention.
  • the present invention as will be described hereinafter provides
  • the present invention may also be used for detecting sounds from other parts of the human body 3.
  • the sensor device 2 is attached to a part of the human body 3, for example a woman's abdomen 4 for detecting fetal heart rate.
  • the sensor device 2 includes a hollow enclosure 6 having a circumferential opening 8.
  • the circumferential opening 8 is placed in contact with the woman's abdomen 4.
  • the hollow enclosure 6 is connected to an air chamber 10 which is located above the hollow enclosure 6.
  • the sensor device 2 also includes a microphone 13 that captures the sound, such as, fetal heart beat from the woman's abdomen 4.
  • the hollow enclosure 6, the air chamber 10 and the microphone 13 are arranged along an axis that is perpendicular to the circumferential opening 8.
  • the sound captured from the woman' s abdomen is converted to a sound signal by the microphone 13 and sent to a processing unit 16.
  • the processing unit 16 is interfaced to the sensor device 2 for processing the sound signal.
  • the processing unit 16 may include filters to filter the sound signal.
  • the processing unit 16 may also include an amplifier to amplify the sound signal.
  • the processing unit 16 is connected to a display unit 18 for displaying the sound signal .
  • the hollow enclosure 6 includes an elastic wall 7 that may be formed from a material which is elastic.
  • a part of the hollow enclosure 6 may be formed from an elastic material.
  • a part of the hollow enclosure 6 around the circumferential opening 8 may be formed from an elastic material.
  • the elastic wall 7 of the hollow enclosure 6 is elastic around the
  • the hollow enclosure 6 may be formed from silicone.
  • silicone is a highly elastic material and can be used several times without losing its elasticity or becoming porous, thereby increasing durability of the hollow enclosure 6.
  • the hollow enclosure 6 may be formed of a shape such that the hollow enclosure 6 is easily compressible when pushed onto the human body 3.
  • the hollow enclosure 6 may be conical in shape. The conical shape enables the hollow enclosure 6 to be easily compressible when pushed onto the human body 3, such as the woman's abdomen 4.
  • the sensor device includes means for creating air pressure difference between the hollow enclosure 6 and the
  • the means for creating air pressure difference includes the elastic wall 7 of the hollow enclosure 6.
  • the sensor device 2 when pushed onto the woman's abdomen 4, contracts the elastic wall 7, creating an air pressure difference which creates a suction effect and enables the sensor device 2 to be securely attached to the woman's abdomen 4.
  • sound from the human body such as the fetal heart beat from the woman' s abdomen 4 is directed to the microphone through the air chamber 10.
  • the detected sound is sent to the processing unit 16, which in turn is connected to the display unit 18.
  • the heart beat data may be displayed in the display unit 18 such as a monitor.
  • the heart beat data may be displayed as an audio. This heart beat data may be analyzed to detect the condition of the fetus, for example.
  • FIG. 2 is a diagrammatical illustration of another embodiment of the sensor device 2 wherein the means for creating air pressure is a pump 20.
  • the pump 20 is connected to the hollow enclosure 6 and is configured to extract air from the hollow enclosure 6.
  • the pump 20 extracts air from the hollow enclosure 6, it creates the air pressure difference between the hollow enclosure 6 and the surroundings.
  • the elastic wall 7 of the hollow enclosure contracts and gets securely
  • the pump 20 is configured to maintain a desired air pressure inside the sensor device 2 by extracting a desired amount of air from the hollow enclosure 6 as well as the air chamber 10.
  • a hand held suction device may be employed to extract air from the hollow enclosure 6 to create suction effect and thereby attach the sensor device 2 to the woman' s abdomen 4.
  • These devices may also include means for
  • FIG.3 illustrates a side view of an embodiment of the sensor device 2.
  • the hollow enclosure 6 is in direct contact with the air chamber 10 so as to prevent any sound from the surroundings to get inside the hollow enclosure 6.
  • the hollow enclosure 6 may be bonded to the air chamber 10.
  • the hollow enclosure 6 may be glued to the air chamber 10 via an adhesive or glue.
  • the air chamber 10 is formed from a material, such as but not limited to stainless steel. Stainless steel prevents external sounds from entering the air chamber 10 and also prevents internal sounds from the human body from going outside the air chamber 10.
  • the air chamber 10 may also be formed from a material such as copper, or materials exhibiting similar properties.
  • the entire air chamber including an inner layer 11 and an outer layer 12 may be formed from stainless steel.
  • only the inner layer 11 of the air chamber 10 may be formed from stainless steel.
  • the outer layer 12 may also be formed from a material that prevents external sounds from entering the air chamber 10, such as but not limited to a hard rubber.
  • the microphone 13 is arranged in an acoustic connection with the air inside the hollow enclosure 6.
  • the acoustic connection is formed by the air chamber 10 separated from the hollow enclosure 6 by a
  • the diaphragm 14 is typically a thin, semirigid membrane configured to vibrate due to the sound from the human body. Vibration of the diaphragm 14 moves the air inside the air chamber 10 transferring energy to the air that is in contact with the diaphragm 14. This air moves
  • the air chamber 10 has a monotonously reducing cross section along an axis 26 of the diaphragm 14. It may be noted that the cross section of the air chamber 10 is
  • the air chamber 10 may be of a shape such as, but not limited to a bell shape, a dome shape or a conical shape.
  • the advantage of the above-mentioned shape of the air chamber 10 is that as the air chamber 10 becomes narrower towards the microphone 13, for the sound waves the energy remains the same and the amplitude increases. This results in amplification of sound at the microphone 13.
  • the hollow enclosure 6, the air chamber 10 and the microphone 13 are arranged along the axis 26 that is perpendicular to the area within the circumferential opening, as illustrated in FIG.3.
  • This arrangement provides a compact design of the exemplary sensor device 2 and further allows proper detection of the sound since the microphone 13 is on an axis towards the human body. More particularly, the microphone 13 is arranged in a manner such that it lies along the axis 26 passing
  • the microphone 13 may be enclosed in a metal enclosure 22.
  • the processing unit 16 may be in a form of a printed circuit board and is enclosed inside the metal enclosure 22.
  • the processing unit 16 may be external to the metal enclosure 22.
  • the processing unit 16 may be a part of another system that includes a processor to generate signal data.
  • the metal enclosure 22 may include packing 23 in the form of washers, or rubber packing that prevents the components inside the metal enclosure 22 from moving from their place.
  • a lid 24 located on the top of the metal enclosure 22 is used to cover the components inside the metal enclosure 22.
  • the lid 24 has a bush 28 which allows wires to pass through it and be connected to the display unit 18 shown in FIG. 1, for
  • FIG . 4 is a diagrammatical illustration depicting bottom view of an embodiment of the sensor device 2 of FIGs. 1-3.
  • the sensor device 2 includes one or more air vents 30.
  • the air vents 30 are located in the air chamber 10. More
  • the air vents 30 are located along the wall of the air chamber 10.
  • the air vents 30 are configured to maintain constant air pressure inside the air chamber 10 so that the vibrations from the diaphragm 14 are effectively transferred to the microphone 13.
  • the air vents 30 also aid in ambient noise cancellation that may be generated from the human body 3 (see FIG. 1) .
  • FIG. 5 is a diagrammatical illustration of a fetal monitoring system 32 according to an embodiment of the present invention wherein the fetal monitoring system 32 has an interface to connect to the sensor device 2 for measuring heart rate of a fetus.
  • the fetal monitoring system 32 has a fetal monitoring processing unit 34 which processes the signals received from the sensor device 2.
  • the fetal monitoring processing unit 34 may convert the signals which are analog signals into digital signals and generate a heart beat data for determining the heart rate of a fetus thereby aiding in determining the health of the fetus. In case of emergency it can suggest requirement of a cesarean.
  • the fetal monitoring system 32 also includes a fetal monitoring data display device 36 for displaying the fetal heart rate data which can be used by doctors or physicians to monitor the health of the fetus.
  • the fetal monitoring display device 36 may be a video display device, a LED display device, any other mechanical display device or any other display device which can display the fetal heart rate data.
  • the fetal monitoring display device 36 may be connected via a wired network or a universal serial bus (USB) .
  • USB universal serial bus
  • the fetal monitoring display device may be remotely connected to the fetal monitoring system 32 via a wireless network, for example, thereby enabling doctors to monitor the heart rate of the fetus from a remote location.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Animal Behavior & Ethology (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Pathology (AREA)
  • Biophysics (AREA)
  • Physics & Mathematics (AREA)
  • Pregnancy & Childbirth (AREA)
  • Reproductive Health (AREA)
  • Gynecology & Obstetrics (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)

Abstract

La présente invention a trait à un dispositif capteur et à un procédé permettant d'utiliser le dispositif capteur en vue de détecter des sons provenant du corps humain. Le dispositif capteur (2) comprend une enceinte creuse (6) dotée d'une ouverture circonférentielle (8), laquelle enceinte creuse (6) et laquelle ouverture circonférentielle (8) sont conçues de manière à ce que lorsque l'ouverture circonférentielle (8) est placée en contact avec un corps humain (3), une pression d'air inférieure à la pression de l'air ambiant pouvant être maintenue à l'intérieur de l'enceinte creuse (6), ce qui permet ainsi de produire un effet d'aspiration permettant de fixer le dispositif capteur (2) sur le corps humain (3); des moyens (7, 20) permettant de créer une différence de pression d'air entre l'enceinte creuse (6) et l'environnement et un microphone (13) permettant de détecter les sons provenant du corps humain (3).
PCT/EP2011/051037 2010-03-05 2011-01-26 Dispositif capteur et procédé permettant d'utiliser le dispositif capteur WO2011107309A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN214/KOL/2010 2010-03-05
IN214KO2010 2010-03-05

Publications (1)

Publication Number Publication Date
WO2011107309A1 true WO2011107309A1 (fr) 2011-09-09

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PCT/EP2011/051037 WO2011107309A1 (fr) 2010-03-05 2011-01-26 Dispositif capteur et procédé permettant d'utiliser le dispositif capteur

Country Status (1)

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WO (1) WO2011107309A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014089060A1 (fr) 2012-12-03 2014-06-12 Elegant Medical LLC Stéthoscope électronique
US20140276150A1 (en) * 2013-03-15 2014-09-18 Ying Sun Apparatus for Acoustic Measurements of Physiological Signals with Automated Interface Controls
CN108472006A (zh) * 2015-12-18 2018-08-31 皇家飞利浦有限公司 胎儿监测系统和方法

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2214847B1 (de) * 1972-03-27 1973-10-18 Rose, Ewald, 5500 Trier Geräuschaufnahmevorrichtung für Körper mit schlaffer Haut, insbesondere zum Abhören von Herzschlaggeräuschen
US4736749A (en) * 1985-04-26 1988-04-12 Astra-Tech Aktiebolag Holder for medical use fixed by vacuum
US4777961A (en) * 1985-10-15 1988-10-18 Bruce Saltzman High sensitivity stethoscopic system and method
US5345935A (en) * 1990-04-19 1994-09-13 Egnell Ameda Limited Non-invasive medical probe provided with suction cup
EP0676170A1 (fr) * 1994-04-04 1995-10-11 Graphic Controls Corporation Sonde à foetus noninvasiblée
WO1997005821A1 (fr) * 1995-08-10 1997-02-20 Pentavox Kft. Procede et appareil pour mesurer le rythme cardiaque d'un foetus et sonde electroacoustique pour capter les sons provenant du coeur d'un foetus
WO2001050953A1 (fr) * 2000-01-07 2001-07-19 Agilent Technologies Inc. Detecteur a contact de succion, notamment pour mesures non-invasives sur un foetus, telles que frequence du pouls
US20030229267A1 (en) * 2000-12-15 2003-12-11 Amir Belson Obstetrical imaging system and integrated fetal vacuum extraction system
WO2009060431A2 (fr) * 2007-11-08 2009-05-14 Association For Public Health Services Extracteur d'accouchement à dépression

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2214847B1 (de) * 1972-03-27 1973-10-18 Rose, Ewald, 5500 Trier Geräuschaufnahmevorrichtung für Körper mit schlaffer Haut, insbesondere zum Abhören von Herzschlaggeräuschen
US4736749A (en) * 1985-04-26 1988-04-12 Astra-Tech Aktiebolag Holder for medical use fixed by vacuum
US4777961A (en) * 1985-10-15 1988-10-18 Bruce Saltzman High sensitivity stethoscopic system and method
US5345935A (en) * 1990-04-19 1994-09-13 Egnell Ameda Limited Non-invasive medical probe provided with suction cup
EP0676170A1 (fr) * 1994-04-04 1995-10-11 Graphic Controls Corporation Sonde à foetus noninvasiblée
WO1997005821A1 (fr) * 1995-08-10 1997-02-20 Pentavox Kft. Procede et appareil pour mesurer le rythme cardiaque d'un foetus et sonde electroacoustique pour capter les sons provenant du coeur d'un foetus
WO2001050953A1 (fr) * 2000-01-07 2001-07-19 Agilent Technologies Inc. Detecteur a contact de succion, notamment pour mesures non-invasives sur un foetus, telles que frequence du pouls
US20030229267A1 (en) * 2000-12-15 2003-12-11 Amir Belson Obstetrical imaging system and integrated fetal vacuum extraction system
WO2009060431A2 (fr) * 2007-11-08 2009-05-14 Association For Public Health Services Extracteur d'accouchement à dépression

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014089060A1 (fr) 2012-12-03 2014-06-12 Elegant Medical LLC Stéthoscope électronique
EP2925233A4 (fr) * 2012-12-03 2015-11-25 Elegant Medical LLC Stéthoscope électronique
US20140276150A1 (en) * 2013-03-15 2014-09-18 Ying Sun Apparatus for Acoustic Measurements of Physiological Signals with Automated Interface Controls
CN108472006A (zh) * 2015-12-18 2018-08-31 皇家飞利浦有限公司 胎儿监测系统和方法
CN108472006B (zh) * 2015-12-18 2021-05-18 飞利浦金科威（深圳）实业有限公司 胎儿监测系统和方法

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