GB2333591A - Carboximeter - Google Patents

Carboximeter Download PDF

Info

Publication number
GB2333591A
GB2333591A GB9801641A GB9801641A GB2333591A GB 2333591 A GB2333591 A GB 2333591A GB 9801641 A GB9801641 A GB 9801641A GB 9801641 A GB9801641 A GB 9801641A GB 2333591 A GB2333591 A GB 2333591A
Authority
GB
United Kingdom
Prior art keywords
carbon monoxide
carboxyhaemoglobin
meter
blood
photodetector
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.)
Withdrawn
Application number
GB9801641A
Other versions
GB9801641D0 (en
Inventor
John Wright
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 GB9801641A priority Critical patent/GB2333591A/en
Publication of GB9801641D0 publication Critical patent/GB9801641D0/en
Publication of GB2333591A publication Critical patent/GB2333591A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths
    • G01N21/3151—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths using two sources of radiation of different wavelengths
    • 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
    • A61B5/1455—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 using optical sensors, e.g. spectral photometrical oximeters

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pathology (AREA)
  • General Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Public Health (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Biophysics (AREA)
  • Animal Behavior & Ethology (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Veterinary Medicine (AREA)
  • Toxicology (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

A carboximeter to measure the level of carboxyhaemoglobin in a patient's blood includes an aperture 4 into which a patient's finger is inserted. The transmission of light through the finger at a plurality of wavelengths eg 3 is detected by a photodetector and the level of carboxyhaemoglobin in the blood is determined by a microprocessor and displayed 3. If data concerning the time elapsed since the patient was possibly exposed to carbon monoxide is entered through keypad 5, the system can determine whether carbon monoxide poisoning has occurred.

Description

PATENT APPLICATION DESCRIPTION TiTLE The CARBOXIMETER is a portable meter for measuring the proportion of carboxyhaemoglobin in patients' blood, using a light source and photodetector.
BACKGROUND TO PROBLEM Carbon monoxide is known to poison humans. The source of carbon monoxide poisoning is usually faulty heaters or gas appliances and car exhausts. At the present, the only way of confirming carbon monoxide poisoning is to take a blood sample - usually a painful arterial sample - to measure the level of carboxyhaemoglobin in blood.
Having conducted an extensive literature search I have concluded that the diagnosis of chronic, subacute and even acute carbon monoxide poisoning is frequently missed. A iarge-scale study into the Incidence of carbon monoxide poisoning has not been done, but I am of the opinion from published research - that a significant minority of patients with Vague' winter symptoms such as headache, nausea, vomiting, diarrhoea and 'flu' have been poisoned by carbon monoxide from faulty home heaters. There are two main reasons for this: 1. Medical practitioners throughout the wortd are not aware of the size of the problem.
2. The need for a blood test makes the practitioner less likely to look for carbon monoxide poisoning.
SOLVING THE PROBLEM This Invention is intended to be used by general practitioners and emergency doctors for rapid, painless confirmation or exclusion of the diagnosis of carbon monoxide poisoning.
HOW DOES IT WORK? The invention is a device for measuring carboxyhaemoglobin levels in blood. It is a carboxyhaemoglobin meter, or a "CARBOXIMETER". The patient simply inserts hislher index finger into an aperture in the carboximeter. Within the aperture Is a light-source, emitting different wavelengths of light. Oxyhaemoglobin, deoxyhaemogiobin and carboxyhaemoglobin absorb light of different wavelengths. The transmission of the light to a photodetector is inversely proportional to the concentration of the three forms of haemoglobin. The photodetector is connected to a microprocessor, and the proportion of carboxyhaemoglobin can be calculated as a percentage of total haemoglobin.
The operator keys in the patients smoking history (i.e yeslno), the number of cigarettes smoked per day and length of time in minutes from leaving home, or the potential source of carbon monoxide. From this data, the microprocessor can calculate the percentage of carboxyhaemoglobin in the patient's blood prior to leaving home. the amounts are displayed on the carboximeter, as a percentage of the total, and the carboximeter indicates whether the patient has been poisoned by carbon monoxide.
ESSENTIAL FEATURES 1. Portable box 2. Battery or mains operated 3. Light source, three wavelengths (possibly two) 4. Photodetector 5. Microprocessor 6. Key pad 7. Display 8. OnJoff switch INTRODUCTION TO DRAWINGS The drawings are half lifesize FIG 1 shows a perspective view FIG 2 shows an end elevation FIG 3 shows a front elevation 1. Switch 2. Feet 3. Display 4. Finger aperture, light source and photodetector 5. Key pad 6. Connection to mains.
7. Identification

Claims (5)

  1. CLAIMS 1. A meter which measures the amount of carboxyhaemoglobin in patients' blood by transmitting light through a finger inserted into an aperture and collecting the subsequent transmitted light at a photodetector.
  2. 2. A meter as claimed in claim 1 which incorporates a key pad and microprocessor to calculate the percentage of carboxyhaemoglobin in patients' blood at the time of the investigation and at the time of leaving home or the source of any carbon monoxide.
  3. 3. A meter as claimed in claim I and claim 2 which indicates whether patients have or have not been poisoned by carbon monoxide.
  4. 4. A meter as claimed in claim 3 which is made from plastic andlor other material and includes a two or three wavelength light source, a photodetector, a microprocessor, a display unit, batteries and mains electricity connection.
  5. 5. A carboximeter as herein described and illustrated in the accompanying drawings.
GB9801641A 1998-01-26 1998-01-26 Carboximeter Withdrawn GB2333591A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9801641A GB2333591A (en) 1998-01-26 1998-01-26 Carboximeter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9801641A GB2333591A (en) 1998-01-26 1998-01-26 Carboximeter

Publications (2)

Publication Number Publication Date
GB9801641D0 GB9801641D0 (en) 1998-03-25
GB2333591A true GB2333591A (en) 1999-07-28

Family

ID=10825918

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9801641A Withdrawn GB2333591A (en) 1998-01-26 1998-01-26 Carboximeter

Country Status (1)

Country Link
GB (1) GB2333591A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009021130A1 (en) * 2007-08-08 2009-02-12 Nonin Medical, Inc. Sensor and system providing physiologic data and biometric identification

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4167331A (en) * 1976-12-20 1979-09-11 Hewlett-Packard Company Multi-wavelength incremental absorbence oximeter
EP0319160A1 (en) * 1987-12-02 1989-06-07 The Boc Group, Inc. Blood parameter monitoring apparatus and methods
US5413100A (en) * 1991-07-17 1995-05-09 Effets Biologiques Exercice Non-invasive method for the in vivo determination of the oxygen saturation rate of arterial blood, and device for carrying out the method
US5638816A (en) * 1995-06-07 1997-06-17 Masimo Corporation Active pulse blood constituent monitoring
US5692503A (en) * 1995-03-10 1997-12-02 Kuenstner; J. Todd Method for noninvasive (in-vivo) total hemoglobin, oxyhemogolobin, deoxyhemoglobin, carboxyhemoglobin and methemoglobin concentration determination

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4167331A (en) * 1976-12-20 1979-09-11 Hewlett-Packard Company Multi-wavelength incremental absorbence oximeter
EP0319160A1 (en) * 1987-12-02 1989-06-07 The Boc Group, Inc. Blood parameter monitoring apparatus and methods
US5413100A (en) * 1991-07-17 1995-05-09 Effets Biologiques Exercice Non-invasive method for the in vivo determination of the oxygen saturation rate of arterial blood, and device for carrying out the method
US5692503A (en) * 1995-03-10 1997-12-02 Kuenstner; J. Todd Method for noninvasive (in-vivo) total hemoglobin, oxyhemogolobin, deoxyhemoglobin, carboxyhemoglobin and methemoglobin concentration determination
US5638816A (en) * 1995-06-07 1997-06-17 Masimo Corporation Active pulse blood constituent monitoring

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009021130A1 (en) * 2007-08-08 2009-02-12 Nonin Medical, Inc. Sensor and system providing physiologic data and biometric identification

Also Published As

Publication number Publication date
GB9801641D0 (en) 1998-03-25

Similar Documents

Publication Publication Date Title
Pigg et al. Reliability of intraoral quantitative sensory testing (QST)
ES2201083T3 (en) ANALYSIS SYSTEM FOR THE SUPERVISION OF THE CONCENTRATION OF AN ANALYTE IN THE BLOOD OF A PATIENT.
EP0619880B1 (en) Improved non-invasive near-infrared quantitative measurement instrument
US6607387B2 (en) Sensor system for diagnosing dental conditions
US6415236B2 (en) Apparatus for determining concentrations of hemoglobins
Perkins et al. Carpal tunnel syndrome in patients with diabetic polyneuropathy
US6990369B2 (en) Probe using diffuse-reflectance spectroscopy
US6968221B2 (en) Low-cost method and apparatus for non-invasively measuring blood glucose levels
JP5652777B2 (en) Biosensor lifetime measurement system and method
WO2003075745A3 (en) Detection, diagnosis, and monitoring of a medical condition or disease with artificial olfactometry
ES2161669T1 (en) GLUCOSE TEST 13C PER BREATH FOR THE DIAGNOSIS OF DIABETES INDICATIONS AND MONITORING OF GLYCEMIC CONTROL.
WO2003107252A3 (en) Method and system for monitoring patient care
CN1979173A (en) Method to give acoustically an information in an analytical system
US20160367155A1 (en) Transcutaneous measurement of hemoglobin changes to calculate estimated blood volume change during peritoneal dialysis
GB2333591A (en) Carboximeter
WO2014141293A2 (en) A method and system for estimation of blood anylates
CN111698943A (en) Systems and methods for non-invasively monitoring hematocrit concentration
White et al. Multicenter assessment of the QuietTrak ambulatory blood pressure recorder according to the 1992 AAMI guidelines
RU2637917C1 (en) Device for cardiorespepratory analysis and method for estimation of cardiorespiratory state
WO2013023037A2 (en) Device and method for measuring an analyte under the nail
Owida et al. Validation of earlobe site as an alternative blood glucose testing approach
US11602301B2 (en) Wheal and flare analyzing system
Wang et al. No efficacy without comparison
WO2017168432A1 (en) A non invasive hba1c meter for measuring blood glucose levels in diabetic patients without physical blood sample using nir (near infra red light)
KR100793662B1 (en) Portable health diagnosis equipment using sweat analysis

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)