JP6733698B2 - センサの制御回路 - Google Patents
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/0215—Measuring pressure in heart or blood vessels by means inserted into the body
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/0205—Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
- A61B5/02055—Simultaneously evaluating both cardiovascular condition and temperature
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/026—Measuring blood flow
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- 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
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
- A61B5/6851—Guide wires
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/10—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring thermal variables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/02—Operational features
- A61B2560/0204—Operational features of power management
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/02—Operational features
- A61B2560/0266—Operational features for monitoring or limiting apparatus function
- A61B2560/0276—Determining malfunction
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
- A61B2562/0247—Pressure sensors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/22—Arrangements of medical sensors with cables or leads; Connectors or couplings specifically adapted for medical sensors
- A61B2562/221—Arrangements of sensors with cables or leads, e.g. cable harnesses
- A61B2562/222—Electrical cables or leads therefor, e.g. coaxial cables or ribbon cables
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/22—Arrangements of medical sensors with cables or leads; Connectors or couplings specifically adapted for medical sensors
- A61B2562/225—Connectors or couplings
- A61B2562/227—Sensors with electrical connectors
-
- 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
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
- A61B5/6852—Catheters
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Description
本実施形態に係る計測装置100は、漏電検知回路156により、一定の漏れ電流が生じたことを検知することができる。また、漏れ電流を検知したことを外部へ出力し、モニタに表示させたり、警告音を発せさせたりすることができる。
上記実施形態では、漏電検知回路156が第1検知回路161と第2検知回路162とを備える例が説明された。しかしながら、漏電検知回路156が、第1検知回路161のみ、または、第2検知回路162のみを備えていてもよい。
血液の圧力や流速の測定は、常時実行されてもよいし、間欠的に実行されてもよい。具体的には、駆動回路152は、定電流を常時出力してもよいし、定電流を間欠的に出力してもよい。例えば、駆動回路152の出力端にスイッチング素子を設け、一定周波数の駆動信号をスイッチング素子に入力し、スイッチング素子をオンオフさせる。その結果、駆動回路152は、間欠的に定電流を出力する。その他、既存の技術を用いて、間欠的な定電流の出力を行うことができる。
123・・・機能スイッチ
132・・・シャフト(長尺部材)
133・・・センサ
137・・・熱電対(検知体)
150・・・制御回路
152・・・駆動回路(定電流回路)
155・・・温度補償用回路
156・・・漏電検知回路
157・・・停止回路
161・・・第1検知回路
162・・・第2検知回路
Rs1・・・第1シャント抵抗
Rs2・・・第2シャント抵抗
COM1・・・第1コンパレータ
COM2・・・第2コンパレータ
C3・・・信号維持コンデンサ
R9・・・放電用抵抗
Claims (9)
- 管腔に挿入可能な長尺部材に設けられて当該管腔内の流体の物理量を計測するセンサの制御回路であって、
上記センサに駆動電流を供給する駆動回路と、
漏れ電流を電圧に変換するシャント抵抗を有する漏電検知回路と、
上記センサへの駆動電流の供給を停止させる停止回路と、を備えており、
上記漏電検知回路は、上記シャント抵抗によって変換された電圧に応じた検知電圧及び定電圧を入力され、当該検知電圧が当該定電圧よりも大きいことに応じて検知信号を出力するコンパレータを有しており、
上記停止回路は、上記コンパレータが出力した上記検知信号により、上記センサへの駆動電流の供給を停止させる、制御回路。 - 上記漏電検知回路は、
上記センサの駆動電流に応じた電流または定電流である所定電流と上記センサからの帰還電流との差に応じた上記漏れ電流を上記シャント抵抗である第1シャント抵抗で変換した電圧に応じた上記検知電圧である第1検知電圧と、上記定電圧と、を入力される上記コンパレータである第1コンパレータを有する第1検知回路と、
上記流体とアースとの間の電流である上記漏れ電流を上記シャント抵抗である第2シャント抵抗で変換した電圧に応じた上記検知電圧である第2検知電圧と、上記定電圧と、を入力される上記コンパレータである第2コンパレータを有する第2検知回路と、を備えており、
上記停止回路は、上記第1コンパレータが出力した上記検知信号である第1検知信号、及び、上記第2コンパレータが出力した上記検知信号である第2検知信号により、上記センサへの駆動電流の供給を停止させる、請求項1に記載の制御回路。 - 上記停止回路は、上記駆動回路から上記センサへの駆動電流の供給をオンオフさせるスイッチング素子であって、上記検知信号によってオンオフされるスイッチング素子と、
上記検知信号によって充電され、上記スイッチング素子をオン状態で維持する信号維持コンデンサと、をさらに有する、請求項2に記載の制御回路。 - 上記漏電検知回路から上記停止回路への上記検知信号の入力をオンオフする機能スイッチをさらに備えた請求項1から3のいずれかに記載の制御回路。
- 上記センサに設けられた検知体からの入力を受ける温度補償用回路をさらに備える請求項1から4のいずれかに記載の制御回路。
- 請求項1から5のいずれかに記載の制御回路と、上記センサと、を備えた計測装置。
- 請求項2に記載の制御回路と、上記センサと、上記長尺部材と、を備えており、
上記長尺部材は、
上記センサと、上記第2検知回路が有する電極と、が設けられた円柱状のボビンと、
上記センサ及び上記電極を露出させる開口を具備するホルダと、を先端部に有しており、
上記第2検知回路は、上記電極とアースとの間に流れる電流を検出する回路であり、
上記開口は、上記ボビンの軸線に沿う軸線方向に延びており、
上記センサと上記電極とは、上記軸線方向に並ぶ計測装置。 - 管腔に挿入可能な長尺部材と、
上記長尺部材に設けられて当該管腔内の流体の物理量を計測するセンサと、
上記センサに駆動電流を供給する駆動回路と、漏れ電流を検出し、検出した漏れ電流に応じた出力を行う漏電検知回路と、を有する制御回路と、を備えており、
上記漏電検知回路は、
所定電流と上記センサからの帰還電流との差に応じた値を漏れ電流として検出する第1検知回路と、上記流体とアースとの間の電流を漏れ電流として検出する第2検知回路とを有しており、
上記所定電流は、上記センサの駆動電流に応じた電流または定電流であり、
上記長尺部材は、
上記センサと、上記第2検知回路が有する電極と、が設けられた円柱状のボビンと、
上記センサ及び上記電極を露出させる開口を具備するホルダと、を先端部に有しており、
上記第2検知回路は、上記電極とアースとの間に流れる電流を検出する回路であり、
上記開口は、上記ボビンの軸線に沿う軸線方向に延びており、
上記センサと上記電極とは、上記軸線方向に並ぶ計測装置。 - 上記センサは、熱線流速計である請求項6から8のいずれかに記載の計測装置。
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JP6523427B2 (ja) | 2014-04-04 | 2019-05-29 | セント.ジュード メディカル システムズ アーベーSt.Jude Medical Systems Ab | 血管内圧力及び流量データ診断のシステム、装置、及び方法 |
KR102190440B1 (ko) * | 2019-06-03 | 2020-12-14 | (주)플로트론 | 열식 질량 유량계 |
US11860197B2 (en) * | 2020-12-22 | 2024-01-02 | Nxstage Medical, Inc. | Leakage current management systems, devices, and methods |
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US20190082975A1 (en) | 2019-03-21 |
JP2019049519A (ja) | 2019-03-28 |
CN113679363A (zh) | 2021-11-23 |
CN109069041B (zh) | 2021-09-17 |
WO2017170363A1 (ja) | 2017-10-05 |
JP6864839B2 (ja) | 2021-04-28 |
US11589763B2 (en) | 2023-02-28 |
JPWO2017170363A1 (ja) | 2019-02-14 |
CN109069041A (zh) | 2018-12-21 |
EP3437552A4 (en) | 2020-03-11 |
EP3437552A1 (en) | 2019-02-06 |
US20230172469A1 (en) | 2023-06-08 |
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