NL7603909A - Fluid level measuring catheter - has oblong body with measuring devices at end connected to gauges - Google Patents

Fluid level measuring catheter - has oblong body with measuring devices at end connected to gauges

Info

Publication number
NL7603909A
NL7603909A NL7603909A NL7603909A NL7603909A NL 7603909 A NL7603909 A NL 7603909A NL 7603909 A NL7603909 A NL 7603909A NL 7603909 A NL7603909 A NL 7603909A NL 7603909 A NL7603909 A NL 7603909A
Authority
NL
Netherlands
Prior art keywords
gauges
measuring
end connected
fluid level
oblong body
Prior art date
Application number
NL7603909A
Other languages
Dutch (nl)
Original Assignee
Mattheus Gijsbertus Jozef Arts
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 Mattheus Gijsbertus Jozef Arts filed Critical Mattheus Gijsbertus Jozef Arts
Priority to NL7603909A priority Critical patent/NL7603909A/en
Publication of NL7603909A publication Critical patent/NL7603909A/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Thermal Sciences (AREA)
  • Electromagnetism (AREA)
  • Medical Informatics (AREA)
  • Veterinary Medicine (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Biomedical Technology (AREA)
  • Pathology (AREA)
  • Biophysics (AREA)
  • Radiology & Medical Imaging (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)

Abstract

The catheter measures the level of a fluid, partic. blood in a natural vessel, eg in a wound during open-heart surgery. It has a oblong body (1) with measuring devices (3) at the end which is inserted in the vessel, while at the other there are connections (5) to measuring gauges etc. The devices can be inductive or capacitive. The body can have a hollow coil insulated from the blood and immersed in it, while a capacitor is connected in parallel with the coil. The coil is connected to an alternating-current source, the frequency of whose voltage is equal to the resonance frequency of the LC-circuit thus formed. The impedance of this LC-circuit at this frequency is measured.
NL7603909A 1976-04-13 1976-04-13 Fluid level measuring catheter - has oblong body with measuring devices at end connected to gauges NL7603909A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL7603909A NL7603909A (en) 1976-04-13 1976-04-13 Fluid level measuring catheter - has oblong body with measuring devices at end connected to gauges

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7603909A NL7603909A (en) 1976-04-13 1976-04-13 Fluid level measuring catheter - has oblong body with measuring devices at end connected to gauges

Publications (1)

Publication Number Publication Date
NL7603909A true NL7603909A (en) 1977-10-17

Family

ID=19826013

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7603909A NL7603909A (en) 1976-04-13 1976-04-13 Fluid level measuring catheter - has oblong body with measuring devices at end connected to gauges

Country Status (1)

Country Link
NL (1) NL7603909A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0338400A2 (en) * 1988-04-16 1989-10-25 DODUCO GMBH + Co Dr. Eugen DÀ¼rrwächter Capacitive sensor for determining the liquid level in a container

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0338400A2 (en) * 1988-04-16 1989-10-25 DODUCO GMBH + Co Dr. Eugen DÀ¼rrwächter Capacitive sensor for determining the liquid level in a container
EP0338400A3 (en) * 1988-04-16 1991-02-06 DODUCO GMBH + Co Dr. Eugen DÀ¼rrwächter Capacitive sensor for determining the liquid level in a container

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Legal Events

Date Code Title Description
BA A request for search or an international-type search has been filed
A85 Still pending on 85-01-01
BV The patent application has lapsed