GB1418337A - Measurement of fluid on pieces of wettable material - Google Patents
Measurement of fluid on pieces of wettable materialInfo
- Publication number
- GB1418337A GB1418337A GB2008673A GB2008673A GB1418337A GB 1418337 A GB1418337 A GB 1418337A GB 2008673 A GB2008673 A GB 2008673A GB 2008673 A GB2008673 A GB 2008673A GB 1418337 A GB1418337 A GB 1418337A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fluid
- strip
- capacitor
- meter
- micro
- 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.)
- Expired
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
- G01N27/223—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
- A61B5/14532—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue for measuring glucose, e.g. by tissue impedance measurement
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/42—Detecting, measuring or recording for evaluating the gastrointestinal, the endocrine or the exocrine systems
- A61B5/4261—Evaluating exocrine secretion production
- A61B5/4266—Evaluating exocrine secretion production sweat secretion
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/42—Detecting, measuring or recording for evaluating the gastrointestinal, the endocrine or the exocrine systems
- A61B5/4261—Evaluating exocrine secretion production
- A61B5/4277—Evaluating exocrine secretion production saliva secretion
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C19/00—Dental auxiliary appliances
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F17/00—Methods or apparatus for determining the capacity of containers or cavities, or the volume of solid bodies
-
- 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
- A61B2562/0295—Strip shaped analyte sensors for apparatus classified in A61B5/145 or A61B5/157
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Animal Behavior & Ethology (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Biophysics (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Endocrinology (AREA)
- Gastroenterology & Hepatology (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Physiology (AREA)
- Epidemiology (AREA)
- Electrochemistry (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
- Fluid Mechanics (AREA)
- Emergency Medicine (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Optics & Photonics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Immunology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Investigating Or Analysing Biological Materials (AREA)
- Measuring And Recording Apparatus For Diagnosis (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
1418337 Electrical measurements; determination of amount of fluid in gingival cavity &c. HARCO ELECTRONICS Ltd 27 April 1973 [28 April 1972] 20086/73 Headings G1B and G1N In a device for the quantitative measurement of fluid on pieces of wettable material, e.g. paper strips, a casing 33 houses circuitry, Fig. 6 (not shown), supplied by a regulated power supply, Fig. 7 (not shown), and a digital read-out meter 16, the circuitry including a variable capacitor having a pair of plates and a dielectric piece of material engageable therebetween, means being provided for connecting the capacitor to the meter 16 whereby the quantity of fluid on the material may be ascertained from the read-out in micro-amperes, As shown in Fig. 9, a paper strip has a crease 38 formed there across and a ridge 39 impressed thereon for stiffening purposes. As described, the capacitor is arranged in an oscillator circuit to vary the base bias of a transistor which is read-out on meter 16. In use, the strip is engaged between two anodized aluminium jaws 20, 21 forming the capacitor plates, jaw 21 being fixed but adjustable, and jaw 20 being movable and spring-biased to apply constant pressure to the strip. The device may be used to determine the quantity of gingival fluid by insetting the strip in the gingival crevise between a tooth and the gum, the calibrate micro-pipettes, micro-burettes, loops or syringes, to determine the quantity of sweat, lacrinal fluid (for determining wearer acceptance of contact lenses), and saliva (for determining suitability for wearing dentures). The strip with its wetted area may be laid under a transparent grid and viewed through a magnifying glass or microscope, the wetted area being determined by counting grid squares.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA140,802A CA960755A (en) | 1971-04-28 | 1972-04-28 | Device and method for the quantitative measurement of fluid on paper strips |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1418337A true GB1418337A (en) | 1975-12-17 |
Family
ID=4093096
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2008673A Expired GB1418337A (en) | 1972-04-28 | 1973-04-27 | Measurement of fluid on pieces of wettable material |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS584301B2 (en) |
DE (1) | DE2321458C3 (en) |
FR (1) | FR2182172B1 (en) |
GB (1) | GB1418337A (en) |
NO (1) | NO137800C (en) |
SE (1) | SE388280B (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5046507A (en) * | 1989-03-20 | 1991-09-10 | Showa Yakuhin Kako Co., Ltd. | Tear production measuring sheet and package therefor |
EP1839576A1 (en) * | 2006-03-29 | 2007-10-03 | F.Hoffmann-La Roche Ag | Test system with test unit for analysing body fluids |
US7819822B2 (en) | 2004-03-06 | 2010-10-26 | Roche Diagnostics Operations, Inc. | Body fluid sampling device |
US8000762B2 (en) | 2004-03-06 | 2011-08-16 | Roche Diagnostics Operations, Inc. | Body fluid sampling device |
CN102589486A (en) * | 2012-01-19 | 2012-07-18 | 上海市计划生育科学研究所 | Tissue pathologic change degree pathological diagnosis quantifying membrane |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE68915809T2 (en) * | 1988-02-20 | 1995-02-16 | Showa Pharm Chem Ind | Test strips for measuring tear production. |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1178534A (en) * | 1957-06-08 | 1959-05-12 | Electronic device for measuring the moisture content of sheet products |
-
1973
- 1973-04-18 SE SE7305507A patent/SE388280B/en unknown
- 1973-04-26 JP JP48048361A patent/JPS584301B2/en not_active Expired
- 1973-04-27 NO NO175173A patent/NO137800C/en unknown
- 1973-04-27 DE DE19732321458 patent/DE2321458C3/en not_active Expired
- 1973-04-27 GB GB2008673A patent/GB1418337A/en not_active Expired
- 1973-04-27 FR FR7315296A patent/FR2182172B1/fr not_active Expired
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5046507A (en) * | 1989-03-20 | 1991-09-10 | Showa Yakuhin Kako Co., Ltd. | Tear production measuring sheet and package therefor |
US7819822B2 (en) | 2004-03-06 | 2010-10-26 | Roche Diagnostics Operations, Inc. | Body fluid sampling device |
US8000762B2 (en) | 2004-03-06 | 2011-08-16 | Roche Diagnostics Operations, Inc. | Body fluid sampling device |
US8162854B2 (en) | 2004-03-06 | 2012-04-24 | Roche Diagnostics Operations, Inc. | Body fluid sampling device |
US8369918B2 (en) | 2004-03-06 | 2013-02-05 | Roche Diagnostics Operations, Inc. | Body fluid sampling device |
US8814808B2 (en) | 2004-03-06 | 2014-08-26 | Roche Diagnostics Operations, Inc. | Body fluid sampling device |
US9022952B2 (en) | 2004-03-06 | 2015-05-05 | Roche Diagnostics Operations, Inc. | Body fluid sampling device |
EP1839576A1 (en) * | 2006-03-29 | 2007-10-03 | F.Hoffmann-La Roche Ag | Test system with test unit for analysing body fluids |
WO2007112908A3 (en) * | 2006-03-29 | 2008-05-29 | Hofmann La Roche Ag F | Test system comprising a test unit for analyzing body fluids |
CN102589486A (en) * | 2012-01-19 | 2012-07-18 | 上海市计划生育科学研究所 | Tissue pathologic change degree pathological diagnosis quantifying membrane |
Also Published As
Publication number | Publication date |
---|---|
SE388280B (en) | 1976-09-27 |
DE2321458A1 (en) | 1973-11-15 |
JPS4981068A (en) | 1974-08-05 |
NO137800B (en) | 1978-01-16 |
FR2182172A1 (en) | 1973-12-07 |
DE2321458B2 (en) | 1979-03-01 |
FR2182172B1 (en) | 1979-01-05 |
JPS584301B2 (en) | 1983-01-25 |
NO137800C (en) | 1978-04-26 |
DE2321458C3 (en) | 1979-10-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |