WO2004049940A1 - Dispositif de mesure du debit expiratoire de pointe portatif - Google Patents

Dispositif de mesure du debit expiratoire de pointe portatif Download PDF

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Publication number
WO2004049940A1
WO2004049940A1 PCT/ES2002/000578 ES0200578W WO2004049940A1 WO 2004049940 A1 WO2004049940 A1 WO 2004049940A1 ES 0200578 W ES0200578 W ES 0200578W WO 2004049940 A1 WO2004049940 A1 WO 2004049940A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
sensor
peak
spirometer
portable
Prior art date
Application number
PCT/ES2002/000578
Other languages
English (en)
Spanish (es)
Inventor
Antonio Bote Bote
Justo Crespo Tejero
Original Assignee
Servicio De Instrumentacion Hospitalaria, S.L.
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
Priority to ES200102319A priority Critical patent/ES2188405B1/es
Priority claimed from ES200102319A external-priority patent/ES2188405B1/es
Application filed by Servicio De Instrumentacion Hospitalaria, S.L. filed Critical Servicio De Instrumentacion Hospitalaria, S.L.
Priority to AU2002358822A priority patent/AU2002358822A1/en
Priority to PCT/ES2002/000578 priority patent/WO2004049940A1/fr
Publication of WO2004049940A1 publication Critical patent/WO2004049940A1/fr

Links

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—Detecting, measuring or recording devices for evaluating the respiratory organs
    • A61B5/087—Measuring breath flow
    • A61B5/0871—Peak expiratory flowmeters

Definitions

  • the present invention relates to a portable peak or peak spirometer
  • Flow Meter designed to measure the maximum expired flow, also known by its initials in English PEF (Peak espiratory Flow), based on the combination of a Pitot tube and a Venturi tube, whose pressure difference is collected and analyzed by a microprocessor that shows it on a display.
  • PEF Pulak espiratory Flow
  • This invention has application in the field of medicine.
  • Spirometry is the measurement of air flows during breathing. These measures are essential for the diagnosis and control of various diseases of the respiratory system, such as asthma, emphysema and COPD (Chronic Pulmonary Obstructive Disease).
  • various parameters are measured such as the total expired volume, the total volume in the first second, and others.
  • PEF or maximum exhaled flow. It consists of the maximum speed at which the air is expelled from the lungs during a forced exhalation. It is usually measured in liters per second or liters per minute. This maximum value is usually reached a few tens of milliseconds after expiration (from 40ms to 200ms), and is maintained for a few milliseconds.
  • spirometers carry out their measurement by one of two types below.
  • One of the types collects the exhaled volume of the subject in bellows or in another container, whose displacement corresponds to the volume of exhaled air. These devices are great by nature to allow you to pick up one . Enough air volume, so you can't easily make laptops.
  • a second type measures the air flow rate through a flow measurement device. The exhaled volume is derived by integrating the airflow regime over some period of time.
  • the portable spiometer, object of the present invention is based on the measurement of the pressure difference between a Venturi tube (negative pressure or depression) and a Pitot tube ( positive pressure) placed in the center of a narrowing of the tube where the user exhales. This double arrangement generates a pressure difference greater than that of any of the elements separately.
  • the Pitot tube is an application of fluid dynamics used to measure velocities, obtaining a pressure at its outlet, called stagnation pressure, proportional to the square of the velocity and the density of the fluid.
  • the Venturi tube is another application of fluid dynamics with which a depression is created when a fluid passes, also proportional to the square of the velocity and the density of the fluid.
  • This pressure difference is injected into a differential pressure sensor., .- which generates a voltage!, Which feeds an analog / digital converter, and a microprocessor, which applies the correct corrections to ensure accuracy and linearity required.
  • the value of the measure is presented on an alphanumeric screen, stored and transmitted by electronic procedures. This screen also presents messages to the user for easy handling.
  • Figure 1 Schematic sectional view of an application tube to the spirometer object of the present invention.
  • the tube (1) is distinguished in the first place where the patient is exhaling; in its final part there is a narrowing (5) where a sensor head (2) has been placed with the two pressure taps: the one corresponding to the Pitot tube (3) in the direction of the flow, and that corresponding to the depression caused in the Venturi tube (4), in the sense.perpe.ndjcu.lar to the flow ..
  • the tube is simple and cheap to make, it can be discarded at a low cost or be disinfected.
  • the sensing head (2) can be cleaned externally without the risk of clogging the holes due to their small size and because they are sealed at its other end.
  • the sensor head (2) is integral with the tube (1), where the holes communicate with the sensor through two holes provided with joints and membranes. With this arrangement all parts that may be contaminated by a patient can be completely discarded or disinfected.
  • the tube (1) is fixed to the body of the spirometer thanks to a groove that carries on one side of the same diameter as the tube.
  • the measurements of the tube (1) and the sensor head (2) are adequate to obtain a sufficient pressure difference to comply with international recommendations on this type of equipment, and so that the pressure loss in the apparatus is as low as possible.
  • Another of the innovations present in this device is the transmission of the measurements made and stored, through various electronic procedures. In this way, the doctor can receive the information quickly, and act accordingly.
  • this stored data can be requested and displayed on the screen (8), being able to create historical, graphical, average, etc., depending on the program inserted in the microprocessor (6).
  • this data and applications can be exported by an RS-232 data transmission module (9).
  • the device In order to be easily transported by the user, the device is highly portable, thanks to the possibility of the materials and technology used, of a size and weight similar to that of a tobacco package, and powered by standard batteries ( 10), easily obtainable in commerce.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Pulmonology (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Physiology (AREA)
  • Physics & Mathematics (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

L'invention concerne un dispositif de mesure du débit expiratoire de pointe portatif, comprenant un tube (1) d'aspiration comportant un étranglement (5) dans lequel est situé un capteur (2). Ce capteur (2) se compose d'un tube de Pitot (3) et d'un tube de Venturi (4) permettant de mesurer le flux expiratoire de pointe (PEF, ou Peak Espiratory Flow) conformément aux recommandations internationales en la matière. Le dispositif comprend également un écran alphanumérique (8) sur lequel sont affichés les résultats des mesures, avec les instructions adéquates pour l'utilisateur. Le dispositif comprend également une mémoire (7) dans laquelle sont stockés ces résultats, un microprocesseur (6) permettant de traiter ces résultats, et des moyens de transmission de données (9).
PCT/ES2002/000578 2001-10-22 2002-12-04 Dispositif de mesure du debit expiratoire de pointe portatif WO2004049940A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES200102319A ES2188405B1 (es) 2001-10-22 2001-10-22 Espirometro portatil de pico.
AU2002358822A AU2002358822A1 (en) 2002-12-04 2002-12-04 Portable peak flow meter
PCT/ES2002/000578 WO2004049940A1 (fr) 2001-10-22 2002-12-04 Dispositif de mesure du debit expiratoire de pointe portatif

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES200102319A ES2188405B1 (es) 2001-10-22 2001-10-22 Espirometro portatil de pico.
PCT/ES2002/000578 WO2004049940A1 (fr) 2001-10-22 2002-12-04 Dispositif de mesure du debit expiratoire de pointe portatif

Publications (1)

Publication Number Publication Date
WO2004049940A1 true WO2004049940A1 (fr) 2004-06-17

Family

ID=32963829

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2002/000578 WO2004049940A1 (fr) 2001-10-22 2002-12-04 Dispositif de mesure du debit expiratoire de pointe portatif

Country Status (1)

Country Link
WO (1) WO2004049940A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10466082B2 (en) 2015-01-08 2019-11-05 University Of Surrey Flow meter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0268108A (ja) * 1988-08-31 1990-03-07 Shintou Dasutokorekutaa Kk 集塵機における自動風量監視装置
GB2267758A (en) * 1992-05-28 1993-12-15 Nagano Limited Airflow measuring device
ES2073542T3 (es) * 1990-01-04 1995-08-16 Glaxo Wellcome Australia Ltd Espirometro.
WO1996010360A1 (fr) * 1994-09-30 1996-04-11 Societe De Thermoformage Et D'injection Des Plastiques - S.T.I. Plastic Appareil de mesure de debit expiratoire de pointe
WO1997020500A1 (fr) * 1995-12-05 1997-06-12 Pulmonary Interface, Inc. Interface pulmonaire

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0268108A (ja) * 1988-08-31 1990-03-07 Shintou Dasutokorekutaa Kk 集塵機における自動風量監視装置
ES2073542T3 (es) * 1990-01-04 1995-08-16 Glaxo Wellcome Australia Ltd Espirometro.
GB2267758A (en) * 1992-05-28 1993-12-15 Nagano Limited Airflow measuring device
WO1996010360A1 (fr) * 1994-09-30 1996-04-11 Societe De Thermoformage Et D'injection Des Plastiques - S.T.I. Plastic Appareil de mesure de debit expiratoire de pointe
WO1997020500A1 (fr) * 1995-12-05 1997-06-12 Pulmonary Interface, Inc. Interface pulmonaire

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 199016, Derwent World Patents Index; AN 1990-119023 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10466082B2 (en) 2015-01-08 2019-11-05 University Of Surrey Flow meter

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