JP7242863B2 - 聴診器 - Google Patents
聴診器 Download PDFInfo
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- JP7242863B2 JP7242863B2 JP2021536962A JP2021536962A JP7242863B2 JP 7242863 B2 JP7242863 B2 JP 7242863B2 JP 2021536962 A JP2021536962 A JP 2021536962A JP 2021536962 A JP2021536962 A JP 2021536962A JP 7242863 B2 JP7242863 B2 JP 7242863B2
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- piezoelectric film
- measured
- stethoscope
- piezoelectric
- protective layer
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- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
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- 229910002113 barium titanate Inorganic materials 0.000 description 2
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 2
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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- 229920001166 Poly(vinylidene fluoride-co-trifluoroethylene) Polymers 0.000 description 1
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
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- 230000004888 barrier function Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
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- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 1
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
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- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
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- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B7/00—Instruments for auscultation
- A61B7/02—Stethoscopes
- A61B7/04—Electric stethoscopes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/25—Bioelectric electrodes therefor
- A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
- A61B5/28—Bioelectric electrodes therefor specially adapted for particular uses for electrocardiography [ECG]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
- A61B5/33—Heart-related electrical modalities, e.g. electrocardiography [ECG] specially adapted for cooperation with other devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/74—Details of notification to user or communication with user or patient ; user input means
- A61B5/7405—Details of notification to user or communication with user or patient ; user input means using sound
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
- B06B1/0644—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element
- B06B1/0662—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element with an electrode on the sensitive surface
- B06B1/067—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element with an electrode on the sensitive surface which is used as, or combined with, an impedance matching layer
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
- G01H11/08—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/02—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/46—Special adaptations for use as contact microphones, e.g. on musical instrument, on stethoscope
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
- H04R17/005—Piezoelectric transducers; Electrostrictive transducers using a piezoelectric polymer
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
- H04R17/02—Microphones
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/85—Piezoelectric or electrostrictive active materials
- H10N30/852—Composite materials, e.g. having 1-3 or 2-2 type connectivity
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/88—Mounts; Supports; Enclosures; Casings
- H10N30/883—Additional insulation means preventing electrical, physical or chemical damage, e.g. protective coatings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
- B06B2201/70—Specific application
- B06B2201/76—Medical, dental
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Pathology (AREA)
- Biophysics (AREA)
- Signal Processing (AREA)
- Cardiology (AREA)
- Multimedia (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Description
まず、図1から図3を参照して、本例示的実施形態に係る聴診器10の構成について説明する。図1から図3に示すように、聴診器10は、支持台20と、圧電フィルム30と、心電電極の一例としてのプラス電極50P、マイナス電極50M及びリファレンス電極50Rがそれぞれに配置された弾力性部材52P、52M、52Rと、を備える。
幅12mmの試験片の一端を試験板の端に貼り、直ちに圧着ローラを用いて、1mm/sの速さで圧着しながら、試験片の他端側が引っ張り代として残るようにして試験板に貼った。試験板を試験機(AGS-X(株式会社島津製作所製)又はZTA(株式会社イマダ製))にセットして、試験片を10mm/sの速さで試験板から引き剥がし、測定値(N)が安定した後から引き剥がし終了時までの測定値の平均を算出して、粘着力の値とした。
次に、図14及び図15を参照して、本例示的実施形態に係る聴診器10の構成について説明する。なお、図14及び図15において、第1例示的実施形態で説明した要素と同等の要素については同一符号を付し、詳細な説明を省略する。
Claims (19)
- 開口部を有する支持台と、
前記開口部から露出した表面が凸状に湾曲した状態で前記支持台に支持され、被測定物から発生される音によって生じる振動を検出する圧電フィルムと、
前記圧電フィルムの前記被測定物と接触する側の面に配置され、前記被測定物の音響インピーダンスと前記圧電フィルムの音響インピーダンスとの間の音響インピーダンスを有する保護層と、
を備える聴診器であって、
前記保護層は、前記被測定物と接触する側ほど音響インピーダンスが低くなるように音響インピーダンスを傾斜させた層、又は前記被測定物と接触する側の層ほど音響インピーダンスが低くなるように積層した複数の層で構成される
聴診器。 - 前記支持台の前記開口部の周囲に延在する面が、前記被測定物に接触する接触面とされ、
前記圧電フィルムの前記開口部から露出した表面が、前記接触面に対して突出している
請求項1に記載の聴診器。 - 前記圧電フィルムの前記開口部から露出した部分の外周を囲み、前記圧電フィルムに伝達される外部音を遮蔽する遮音部材を更に備える
請求項1又は請求項2に記載の聴診器。 - 前記遮音部材の先端が、前記圧電フィルムの凸状に湾曲した表面に対して突出している
請求項3に記載の聴診器。 - 前記圧電フィルムの前記被測定物と接触する側とは反対側に設けられ、前記圧電フィルムを支持するクッション材を更に備える
請求項1から請求項4の何れか1項に記載の聴診器。 - 前記圧電フィルムの前記被測定物と接触する側とは反対側に、前記圧電フィルムを支持する気体が充填されている
請求項1から請求項4の何れか1項に記載の聴診器。 - 前記保護層は、音響インピーダンスが1.3MRayls以上5.0MRayls以下である
請求項1から請求項6の何れか1項に記載の聴診器。 - 前記保護層は、エラストマー材料、シリコーン樹脂、シリコーンゴム、ウレタンゴム、天然ゴム、スチレンブタジエンゴム、クロロプレンゴム、アクリルニトリルゴム、ブチルゴム、エチレンプロピレンゴム、フッ素ゴム及びクロソスルホン化ポリエチレンゴムのうち少なくとも1つからなる
請求項1から請求項7の何れか1項に記載の聴診器。 - 前記保護層は、ASTM D2240に準拠したタイプAデュロメータを用いた硬さ試験における測定値が50以上100以下である
請求項1から請求項8の何れか1項に記載の聴診器。 - 前記保護層は、前記被測定物と接触する面が粗面化されている
請求項1から請求項9の何れか1項に記載の聴診器。 - 前記保護層は、前記被測定物と接触する面の算術平均粗さRaが0.1μm以上、100μm以下である
請求項10に記載の聴診器。 - 前記保護層は、前記被測定物と接触する面がシリコーン樹脂からなり、該シリコーン樹脂は、シロキサン骨格を主鎖骨格とし、疎水性の側鎖としてメチル基、ビニル・メチル基及びフェニル・メチル基の少なくとも1つを有する
請求項1から請求項11の何れか1項に記載の聴診器。 - 前記圧電フィルムは、
互いに対向する2つの主面として、前記被測定物の側の主面である第1の主面、及び前記被測定物の側とは逆の主面である第2の主面を有する圧電体層と、
前記第1の主面に設けられた第1の電極と、
前記第2の主面に設けられた第2の電極と、
を備える請求項1から請求項12の何れか1項に記載の聴診器。 - 前記圧電体層は、高分子材料からなるマトリックス中に、圧電体粒子を分散してなる高分子複合圧電体からなる
請求項13に記載の聴診器。 - 前記圧電体層は、前記圧電体層の厚み方向に誘電分極を生じる
請求項13又は請求項14に記載の聴診器。 - 前記圧電体層は、誘電分極により、前記第2の主面の側に正の電荷を生じ、前記第1の主面の側に負の電荷を生じる
請求項15に記載の聴診器。 - 前記第1の電極は、前記第1の主面の中央部のみに設けられている
請求項13から請求項16の何れか1項に記載の聴診器。 - 前記圧電フィルムは、前記振動に基づいて振動信号を出力し、
前記振動信号に基づいて音信号を出力し、前記振動信号のレベル変化に応じて前記音信号のレベルを調整する出力部を更に備える
請求項1から請求項17の何れか1項に記載の聴診器。 - 前記圧電フィルムの周囲に配置され、前記被測定物の心電を検出する心電電極を更に備える
請求項1から請求項18の何れか1項に記載の聴診器。
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