NL7504686A - Zero correction for electronic measuring system - used e.g. for measuring blood pressure is fully electronic and automatic in operation - Google Patents

Zero correction for electronic measuring system - used e.g. for measuring blood pressure is fully electronic and automatic in operation

Info

Publication number
NL7504686A
NL7504686A NL7504686A NL7504686A NL7504686A NL 7504686 A NL7504686 A NL 7504686A NL 7504686 A NL7504686 A NL 7504686A NL 7504686 A NL7504686 A NL 7504686A NL 7504686 A NL7504686 A NL 7504686A
Authority
NL
Netherlands
Prior art keywords
electronic
measuring system
automatic
blood pressure
memory
Prior art date
Application number
NL7504686A
Other languages
Dutch (nl)
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Priority to NL7504686A priority Critical patent/NL7504686A/en
Publication of NL7504686A publication Critical patent/NL7504686A/en

Links

Classifications

    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R17/00—Measuring arrangements involving comparison with a reference value, e.g. bridge
    • G01R17/02—Arrangements in which the value to be measured is automatically compared with a reference value

Landscapes

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

Abstract

A zero connection system for an electronic measuring system especially one used in deriving signals from various forms of transducers, in which a correction signal is derived in a reference measurement and stored in a memory for subsequent application. The generator for the error signal consists of a comparator (1) with one input (9) connected to an output of the measuring system and the other (13) connected to a reference signal source: the output is connected through a switch (17) to the memory which is formed by a storage capacitor (19) connected to the gate of a field effect transistor (21)in series with a resistance (23) to form a potential divider.. The transducer (3) feeds a differential amplifier (5) which is also fed with a correction signal from the potential divider through the line (25). The arrangement is fully electronic, as compared with similar known systems which require adjustment of mechanical controls, such as potentiometers.
NL7504686A 1975-04-21 1975-04-21 Zero correction for electronic measuring system - used e.g. for measuring blood pressure is fully electronic and automatic in operation NL7504686A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL7504686A NL7504686A (en) 1975-04-21 1975-04-21 Zero correction for electronic measuring system - used e.g. for measuring blood pressure is fully electronic and automatic in operation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7504686A NL7504686A (en) 1975-04-21 1975-04-21 Zero correction for electronic measuring system - used e.g. for measuring blood pressure is fully electronic and automatic in operation

Publications (1)

Publication Number Publication Date
NL7504686A true NL7504686A (en) 1976-10-25

Family

ID=19823619

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7504686A NL7504686A (en) 1975-04-21 1975-04-21 Zero correction for electronic measuring system - used e.g. for measuring blood pressure is fully electronic and automatic in operation

Country Status (1)

Country Link
NL (1) NL7504686A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2439997A1 (en) * 1978-10-26 1980-05-23 Hazemeijer Bv CAPACITIVE VOLTAGE DIVIDER

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2439997A1 (en) * 1978-10-26 1980-05-23 Hazemeijer Bv CAPACITIVE VOLTAGE DIVIDER

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