FR2422161A1 - Detecting bubble in liq. for medical infusion - using liq. in tube as capacitor dielectric with change in value fed to comparator - Google Patents

Detecting bubble in liq. for medical infusion - using liq. in tube as capacitor dielectric with change in value fed to comparator

Info

Publication number
FR2422161A1
FR2422161A1 FR7810095A FR7810095A FR2422161A1 FR 2422161 A1 FR2422161 A1 FR 2422161A1 FR 7810095 A FR7810095 A FR 7810095A FR 7810095 A FR7810095 A FR 7810095A FR 2422161 A1 FR2422161 A1 FR 2422161A1
Authority
FR
France
Prior art keywords
liq
capacitor
comparator
tube
bubble
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
FR7810095A
Other languages
French (fr)
Other versions
FR2422161B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7810095A priority Critical patent/FR2422161A1/en
Publication of FR2422161A1 publication Critical patent/FR2422161A1/en
Application granted granted Critical
Publication of FR2422161B1 publication Critical patent/FR2422161B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

The bubble of air or gas in liquid used for medical infusion is detected by coils providing coupling to capacitor formed by liq. in tubing. A bubble changes dielectric value and thus value of the capacitor. A highly stable quartz oscillator (3) has a transformer (4) coupling to the capacitor plates (1) separated by dielectric formed by liquid flowing in tube (2). Plate separation and capacitor adjustment is provided by a micrometer screw (7). Change in capacitor value due to bubble is detected for amplification (5) for a comparator (6) circuit.
FR7810095A 1978-04-05 1978-04-05 Detecting bubble in liq. for medical infusion - using liq. in tube as capacitor dielectric with change in value fed to comparator Granted FR2422161A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7810095A FR2422161A1 (en) 1978-04-05 1978-04-05 Detecting bubble in liq. for medical infusion - using liq. in tube as capacitor dielectric with change in value fed to comparator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7810095A FR2422161A1 (en) 1978-04-05 1978-04-05 Detecting bubble in liq. for medical infusion - using liq. in tube as capacitor dielectric with change in value fed to comparator

Publications (2)

Publication Number Publication Date
FR2422161A1 true FR2422161A1 (en) 1979-11-02
FR2422161B1 FR2422161B1 (en) 1981-10-09

Family

ID=9206716

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7810095A Granted FR2422161A1 (en) 1978-04-05 1978-04-05 Detecting bubble in liq. for medical infusion - using liq. in tube as capacitor dielectric with change in value fed to comparator

Country Status (1)

Country Link
FR (1) FR2422161A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19651355A1 (en) * 1996-12-10 1998-06-18 Fresenius Medical Care De Gmbh Gas bubble detector for measuring fluid flow gas component in medical infusion or blood dialysis device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1315918A (en) * 1961-12-14 1963-01-25 Commissariat Energie Atomique Duct fragment passage detector
FR2067572A5 (en) * 1969-11-07 1971-08-20 Aura
DE2017112A1 (en) * 1970-04-10 1971-10-21 Hauni-Werke Körber & Co KG, 2050 Hamburg Peritoneal dialysis machine
FR2282111A1 (en) * 1974-08-12 1976-03-12 Ieram Sarl Gas bubble detector for pipe system - compares voltage at spaced electrodes receiving oscillations with reference
GB1491439A (en) * 1974-11-07 1977-11-09 Malcom Ellis Ltd Devices for detecting and indicating the proportions of liquid and gas in fluid or emulsion

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1315918A (en) * 1961-12-14 1963-01-25 Commissariat Energie Atomique Duct fragment passage detector
FR2067572A5 (en) * 1969-11-07 1971-08-20 Aura
DE2017112A1 (en) * 1970-04-10 1971-10-21 Hauni-Werke Körber & Co KG, 2050 Hamburg Peritoneal dialysis machine
FR2282111A1 (en) * 1974-08-12 1976-03-12 Ieram Sarl Gas bubble detector for pipe system - compares voltage at spaced electrodes receiving oscillations with reference
GB1491439A (en) * 1974-11-07 1977-11-09 Malcom Ellis Ltd Devices for detecting and indicating the proportions of liquid and gas in fluid or emulsion

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19651355A1 (en) * 1996-12-10 1998-06-18 Fresenius Medical Care De Gmbh Gas bubble detector for measuring fluid flow gas component in medical infusion or blood dialysis device
DE19651355B4 (en) * 1996-12-10 2004-03-18 Fresenius Medical Care Deutschland Gmbh Gas bubble detector

Also Published As

Publication number Publication date
FR2422161B1 (en) 1981-10-09

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