GB834986A - Improved apparatus for determining blood loss during surgical operations - Google Patents
Improved apparatus for determining blood loss during surgical operationsInfo
- Publication number
- GB834986A GB834986A GB25029/58A GB2502958A GB834986A GB 834986 A GB834986 A GB 834986A GB 25029/58 A GB25029/58 A GB 25029/58A GB 2502958 A GB2502958 A GB 2502958A GB 834986 A GB834986 A GB 834986A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solution
- blood
- bridge
- container
- blood loss
- 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
- 239000008280 blood Substances 0.000 title abstract 6
- 210000004369 blood Anatomy 0.000 title abstract 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 3
- 238000007865 diluting Methods 0.000 abstract 1
- 239000012153 distilled water Substances 0.000 abstract 1
- 239000003792 electrolyte Substances 0.000 abstract 1
- 230000003834 intracellular effect Effects 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 230000002441 reversible effect Effects 0.000 abstract 1
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
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
-
- 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 for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
- A61B5/02042—Determining blood loss or bleeding, e.g. during a surgical procedure
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Surgery (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Pathology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Biophysics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Analytical Chemistry (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Cardiology (AREA)
- Physiology (AREA)
- Biochemistry (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Investigating Or Analysing Biological Materials (AREA)
Abstract
834,986. Measuring blood loss. RUBRICIUS, J. L. Aug. 5, 1958 [Aug. 6, 1957], No. 25029/58. Class 81 (2). [Also in Group XXXVI] The amount of blood lost during a surgical operation is determined by diluting it with water or other suitable liquid, whereby intracellular electrolytes are liberated into the solution, and sensing the electrical conductivity of the solution. As shown, blood is drawn from the operating site by a pump 18 via pipes 26, 20, into a container 12 containing a measured volume of distilled water 34, and blood-soaked swabs are placed in a mesh basket 36 suspended in the water, which is agitated by an agitator 32 driven by an external motor 30. The conductivity of the blood solution is measured by an automatically self-balancing A.C. energized Wheatstone bridge comprising two electrodes 40 immersed in the solution and a temperaturecompensating thermistor 42, also immersed. The other two arms of the bridge comprise resistors 44, 46 and a common variable resistor 48, the position of the sliding contact 50 of which is varied by a reversible electric motor 56 fed with the amplified error signal from the bridge, to restore balance; motor 56 also drives the pointer of a meter 58 which is calibrated in terms of blood loss. At the end of the operation the solution is pumped out of the container 12 by pump 18. Modifications mentioned include locating the electrodes 40 in the outlet pipe 16 from the container, and continuously circulating the solution; adapting the bridge circuit for manual rebalancing ; and replacing the thermistor 42 with a manually variable resistor.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US67655957 US2899636A (en) | 1957-08-06 | 1957-08-06 | rubricius |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB834986A true GB834986A (en) | 1960-05-18 |
Family
ID=592441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25029/58A Expired GB834986A (en) | 1957-08-06 | 1958-08-05 | Improved apparatus for determining blood loss during surgical operations |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2899636A (en) |
| DE (1) | DE1066318B (en) |
| GB (1) | GB834986A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5266189U (en) * | 1975-11-12 | 1977-05-16 | ||
| GB2128335A (en) * | 1982-08-13 | 1984-04-26 | Omnium Assets Trust Syndicate | Measuring conductivity of a soil sample |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB973807A (en) * | 1959-12-24 | 1964-10-28 | Yellow Springs Instr | Improvements in instruments for determining characteristics of blood |
| US3182252A (en) * | 1960-12-16 | 1965-05-04 | Berg Janwillem Van Den | Blood loss meter |
| DK105368C (en) * | 1965-03-19 | 1966-09-19 | Danske Sukkerfab | Method for determining the purity of a flowing solution or mixture and apparatus for performing the method. |
| US3382429A (en) * | 1965-06-02 | 1968-05-07 | Ind Instr Inc | Method of and apparatus utilizing bridge for measuring conductivity |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2192123A (en) * | 1936-09-09 | 1940-02-27 | Champion Paper & Fibre Co | Determination of hydrogen-ion concentration |
| US2687139A (en) * | 1948-04-22 | 1954-08-24 | Bois Co Inc Du | Method for controlling detergent concentration in dishwashing machines or the like |
| US2621235A (en) * | 1951-08-31 | 1952-12-09 | American Sterilizer Co | Draw-off cock and temperature compensated conductivity cell for distilled water |
-
1957
- 1957-08-06 US US67655957 patent/US2899636A/en not_active Expired - Lifetime
-
1958
- 1958-07-26 DE DE1958R0023767 patent/DE1066318B/de active Pending
- 1958-08-05 GB GB25029/58A patent/GB834986A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5266189U (en) * | 1975-11-12 | 1977-05-16 | ||
| GB2128335A (en) * | 1982-08-13 | 1984-04-26 | Omnium Assets Trust Syndicate | Measuring conductivity of a soil sample |
Also Published As
| Publication number | Publication date |
|---|---|
| US2899636A (en) | 1959-08-11 |
| DE1066318B (en) | 1959-10-01 |
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