GB829409A - Apparatus for sampling gas expired by a patient - Google Patents
Apparatus for sampling gas expired by a patientInfo
- Publication number
- GB829409A GB829409A GB1314456A GB1314456A GB829409A GB 829409 A GB829409 A GB 829409A GB 1314456 A GB1314456 A GB 1314456A GB 1314456 A GB1314456 A GB 1314456A GB 829409 A GB829409 A GB 829409A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switch
- analyser
- tube
- patient
- breathing
- 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
- 238000005070 sampling Methods 0.000 title 1
- 210000002345 respiratory system Anatomy 0.000 abstract 4
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/08—Measuring devices for evaluating the respiratory organs
- A61B5/083—Measuring rate of metabolism by using breath test, e.g. measuring rate of oxygen consumption
- A61B5/0836—Measuring rate of CO2 production
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/483—Physical analysis of biological material
- G01N33/497—Physical analysis of biological material of gaseous biological material, e.g. breath
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Chemical & Material Sciences (AREA)
- Hematology (AREA)
- Obesity (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Food Science & Technology (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Urology & Nephrology (AREA)
- Emergency Medicine (AREA)
- Medicinal Chemistry (AREA)
- Physiology (AREA)
- Pulmonology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
A breathing-tube 1 through which the patient is intended to inspire and expire is connected to analyser 2 through which gas can be drawn from the tube 1, or from the patient's respiratory tract. The analyser 2 incorporates a semi-permeable or other restrictive device whereby gas can only enter the analyser from the breathing-tube 1, or the patient's respiratory tract when a flow is induced by other means such as a suction pump or fan 4 actuated by a source of electric power 5. Alternatively a pump or fan could be situated in the tube 3 between the analyser and the breathing-tube 1, or the respiratory tract. Moreover, between the <PICT:0829409/III/1> analyser and the pump or fan is connected a valve 6 actuatable by a solenoid 7. Two spaced points in the breathing-tube 1 are connected through a pair of tubes 8 and 9 respectively to opposite sides of a diaphragm 10 of a pressure-sensitive switch 11, and the arrangement is such that the pressure differential acting on opposite sides of the diaphragm as the patient expires through the tube 1 will cause the switch to close. The switch 11 is in series with an adjustable resistance 12 and the coil of a relay 13 which is connected to a direct-current supply from the power source 5. Energization of the relay 13 closes the switch 14 and moves the contact piece of the switch 15 to the alternative position. When the switch 11 is closed the condenser 16 is charged at a rate depending on the setting of the resistance 12 to provide a delay before actuation of the relay 13. When the relay 13 is actuated the switch 15 is changed from the position shown to discharge the condenser quickly through the resistance 17, and at the same time the switch 14 is closed to energize the solenoid 7 and thereby open the valve 6. Opening of the valve 6 will cause the suction pump or fan to be placed in operative connection with the analyser so that gas is drawn into the analyser from the breathing-tube, or from the patient's respiratory tract. At the end of expiration the switch 11 opens and the parts return to the positions shown. In use the resistance 12 is so adjusted that gas is only drawn into the analyser during the latter part of the expiration of the patient, normally corresponding to the expiration of the final part of the "end-tidal gas."
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1314456A GB829409A (en) | 1956-04-30 | 1956-04-30 | Apparatus for sampling gas expired by a patient |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1314456A GB829409A (en) | 1956-04-30 | 1956-04-30 | Apparatus for sampling gas expired by a patient |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB829409A true GB829409A (en) | 1960-03-02 |
Family
ID=10017661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1314456A Expired GB829409A (en) | 1956-04-30 | 1956-04-30 | Apparatus for sampling gas expired by a patient |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB829409A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2441377A1 (en) * | 1978-11-08 | 1980-06-13 | Draegerwerk Ag | DEVICE FOR MEASURING IN THE BREATH OF THE ALCOHOLIC RATE |
| US5050615A (en) * | 1988-09-02 | 1991-09-24 | Instrumentarium Corp. | Method for the determination of a gas component content in the respiratory gas of a patient |
| US5072737A (en) * | 1989-04-12 | 1991-12-17 | Puritan-Bennett Corporation | Method and apparatus for metabolic monitoring |
| EP0774233A1 (en) * | 1995-11-15 | 1997-05-21 | Instrumentarium Corporation | Method of preventing the formation of a dangerous underpressure in a respiratory system |
| US5873361A (en) * | 1994-11-14 | 1999-02-23 | Instrumentarium Corp. | Method of preventing the formation of a dangerous underpressure in a respiratory system |
| WO2002095398A1 (en) * | 2001-05-24 | 2002-11-28 | University Of Florida | Method and apparatus for detecting environmental smoke exposure |
| US6981947B2 (en) | 2002-01-22 | 2006-01-03 | University Of Florida Research Foundation, Inc. | Method and apparatus for monitoring respiratory gases during anesthesia |
| US7052854B2 (en) | 2001-05-23 | 2006-05-30 | University Of Florida Research Foundation, Inc. | Application of nanotechnology and sensor technologies for ex-vivo diagnostics |
| US7104963B2 (en) | 2002-01-22 | 2006-09-12 | University Of Florida Research Foundation, Inc. | Method and apparatus for monitoring intravenous (IV) drug concentration using exhaled breath |
| EP1964514A1 (en) | 2007-02-28 | 2008-09-03 | General Electric Company | Controlling the operation of a respiratory gas monitor |
| US7820108B2 (en) | 1999-11-08 | 2010-10-26 | University Of Florida Research Foundation, Inc. | Marker detection method and apparatus to monitor drug compliance |
| US7914460B2 (en) | 2006-08-15 | 2011-03-29 | University Of Florida Research Foundation, Inc. | Condensate glucose analyzer |
| US8211035B2 (en) | 2002-01-22 | 2012-07-03 | University Of Florida Research Foundation, Inc. | System and method for monitoring health using exhaled breath |
| US8230858B2 (en) | 2008-04-01 | 2012-07-31 | General Electric Company | Controlling the operation of a respiratory gas monitor |
-
1956
- 1956-04-30 GB GB1314456A patent/GB829409A/en not_active Expired
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2441377A1 (en) * | 1978-11-08 | 1980-06-13 | Draegerwerk Ag | DEVICE FOR MEASURING IN THE BREATH OF THE ALCOHOLIC RATE |
| US5050615A (en) * | 1988-09-02 | 1991-09-24 | Instrumentarium Corp. | Method for the determination of a gas component content in the respiratory gas of a patient |
| US5072737A (en) * | 1989-04-12 | 1991-12-17 | Puritan-Bennett Corporation | Method and apparatus for metabolic monitoring |
| US5873361A (en) * | 1994-11-14 | 1999-02-23 | Instrumentarium Corp. | Method of preventing the formation of a dangerous underpressure in a respiratory system |
| EP0774233A1 (en) * | 1995-11-15 | 1997-05-21 | Instrumentarium Corporation | Method of preventing the formation of a dangerous underpressure in a respiratory system |
| US7820108B2 (en) | 1999-11-08 | 2010-10-26 | University Of Florida Research Foundation, Inc. | Marker detection method and apparatus to monitor drug compliance |
| US7052854B2 (en) | 2001-05-23 | 2006-05-30 | University Of Florida Research Foundation, Inc. | Application of nanotechnology and sensor technologies for ex-vivo diagnostics |
| WO2002095398A1 (en) * | 2001-05-24 | 2002-11-28 | University Of Florida | Method and apparatus for detecting environmental smoke exposure |
| US7052468B2 (en) | 2001-05-24 | 2006-05-30 | University Of Florida Research Foundation, Inc. | Method and apparatus for detecting environmental smoke exposure |
| US6981947B2 (en) | 2002-01-22 | 2006-01-03 | University Of Florida Research Foundation, Inc. | Method and apparatus for monitoring respiratory gases during anesthesia |
| US7104963B2 (en) | 2002-01-22 | 2006-09-12 | University Of Florida Research Foundation, Inc. | Method and apparatus for monitoring intravenous (IV) drug concentration using exhaled breath |
| US8211035B2 (en) | 2002-01-22 | 2012-07-03 | University Of Florida Research Foundation, Inc. | System and method for monitoring health using exhaled breath |
| US7914460B2 (en) | 2006-08-15 | 2011-03-29 | University Of Florida Research Foundation, Inc. | Condensate glucose analyzer |
| EP1964514A1 (en) | 2007-02-28 | 2008-09-03 | General Electric Company | Controlling the operation of a respiratory gas monitor |
| US8230858B2 (en) | 2008-04-01 | 2012-07-31 | General Electric Company | Controlling the operation of a respiratory gas monitor |
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