WO2001012056A1 - Capteur corporel et dispositif de detection servant a detecter les caracteristiques chimiques et physiques d'une partie du corps - Google Patents

Capteur corporel et dispositif de detection servant a detecter les caracteristiques chimiques et physiques d'une partie du corps Download PDF

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Publication number
WO2001012056A1
WO2001012056A1 PCT/IT1999/000265 IT9900265W WO0112056A1 WO 2001012056 A1 WO2001012056 A1 WO 2001012056A1 IT 9900265 W IT9900265 W IT 9900265W WO 0112056 A1 WO0112056 A1 WO 0112056A1
Authority
WO
WIPO (PCT)
Prior art keywords
body portion
sensor
temperature
physical characteristics
conditioning
Prior art date
Application number
PCT/IT1999/000265
Other languages
English (en)
Inventor
Michele Setaro
Adele Sparavigna
Original Assignee
Derming S.R.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
Application filed by Derming S.R.L. filed Critical Derming S.R.L.
Priority to PCT/IT1999/000265 priority Critical patent/WO2001012056A1/fr
Priority to AU53868/99A priority patent/AU5386899A/en
Publication of WO2001012056A1 publication Critical patent/WO2001012056A1/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
    • A61B5/145—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
    • A61B5/14539—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 pH
    • 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
    • A61B5/1491—Heated applicators
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/44—Detecting, measuring or recording for evaluating the integumentary system, e.g. skin, hair or nails
    • A61B5/441—Skin evaluation, e.g. for skin disorder diagnosis

Definitions

  • the present invention relates to a body sensor, and to a detecting device for detecting chemical-physical characteristics of a body portion.
  • BACKGROUND ART Body sensors are known in which a sensitive portion of the sensor is pressed lightly onto a surface portion of a body portion, in particular onto the skin, to determine chemical-physical characteristics of the body portion, e.g. the pH value of the skin.
  • the chemical-physical characteristic measurements depend on a number of parameters (e.g. the moisture of the body portion) , which in turn depend largely on the surface temperature of the body portion.
  • the surface temperature of the body portion is largely affected by the temperature of the external environment in which the measurement is made, and by the temperature of the subject. Consequently, measurements made in environments at different temperatures and/or on the same subject in different physical conditions (e.g. in normal health and when feverish) result in different readings, on account of the variation in temperature caused by extraneous factors (ambient temperature and temperature of the subject) altering the measuring parameters.
  • a body sensor characterized by comprising: detecting means having at least one sensitive portion which is placed in contact with a body portion, in particular a skin portion, to determine chemical- physical characteristics of the body portion; and conditioning means cooperating with said detecting means to maintain said body portion at a predetermined temperature .
  • the temperature of the body portion is thus made independent of ambient temperature and/or the temperature of the subject, the measuring results are no longer aff cted by extraneous f ctors , and the measurement is made repeatable by different measurements being made on body portions at the same temperature.
  • Figure 1 shows, schematically, a body sensor in accordance with the teachings of the present invention and operating in conjunction with a detecting device for detecting chemical-physical characteristics of a body portion
  • Figure 2 shows a logic operating diagram of the Figure 1 device.
  • FIG. 1 indicates as a whole a body sensor wherein an insulating casing 3 (e.g. made of plastic material) supports a sensing device 5 (known) for determining chemical-physical characteristics of a body portion 7, and a conditioning device 10 which, in use, maintains body portion 7 at a substantially constant predetermined temperature.
  • Insulating casing 3 comprises a cylindrical tubular wall 3a coaxial with an axis 12 and closed, at a first end, by a flat end wall 3b perpendicular to axis 12. At a second end, cylindrical tubular wall 3a has a circular opening 15.
  • Wall 3a has a through hole 16 coaxial with axis 12 and engaged by sensing device 5, which is cylindrical on the outside and comprises an end 5a fitted with a flat sensitive portion 18 which is suitable to be placed on the outer surface 7a of body portion 7 to determine at least one chemical-physical characteristic (e.g. the pH value) of portion 7. More specifically, sensitive portion 18 is positioned substantially coplanar with a plane P perpendicular to axis 12 and through the free peripheral edges of wall 3a.
  • sensing device 5 is cylindrical on the outside and comprises an end 5a fitted with a flat sensitive portion 18 which is suitable to be placed on the outer surface 7a of body portion 7 to determine at least one chemical-physical characteristic (e.g. the pH value) of portion 7. More specifically, sensitive portion 18 is positioned substantially coplanar with a plane P perpendicular to axis 12 and through the free peripheral edges of wall 3a.
  • the conditioning device comprises a first flat annular disk 21 internally defining a circular opening 22/ and a second annular disk 23 over, coaxial with, and spaced with respect to first disk 21.
  • a number of Peltier-effect heating-cooling devices 25 connected by electric supply cables 27 are interposed between first and second disks 21 and 23, and comprise two dissimilar conductors (not shown), e.g. antimony and bismuth, arranged contacting each other.
  • Disks 21 and 23 are made of good heat-conducting material, and are housed inside tubular wall 3a, coaxially with axis 12, with first disk 21 substantially coplanar with plane P.
  • a temperature sensor 29 is interposed between disks 21 and 23, and is connected by an electric cable 30 to a measuring device 34 controlling, among other things, devices 25.
  • Device 34 is also connected by a cable 37 to sensing device 5, and comprises display devices 40 for displaying the measurement (e.g. the pH value) of the chemical-physical quantity measured by sensing device 5.
  • the tubular casing 3 is placed on a body portion 7, e.g. the back of a hand, with first annular disk 21 contacting the outer surface 7a of body portion 7; and sensing device 5 is moved along axis 12 so that sensitive portion 18 is pressed lightly onto surface (skin) 7a to enable the measurement to be made. In the above position, sensitive portion 18 is located inside opening 22 and substantially coplanar with plane P.
  • Block 100 is followed by a block 110 which, by means of sensor 29, determines a measured temperature Tmis representing the temperature of body portion 7 beneath, and within the perimeter of, disk 21.
  • Block 110 is followed by a block 120 which compares measured temperature Tmis with reference temperature To and is followed by : a block 130 if measured temperature Tmis is higher than the reference temperature - Tmis > To; a block 140 if measured temperature Tmis is lower than the reference temperature - Tmis ⁇ To; and a block 150 if measured temperature Tmis is substantially equal to the reference temperature - Tmis ⁇ To.
  • Block 130 supplies devices 25 with a current i in a first direction to withdraw heat inside devices 25 and cool disk 21 connected thermally to devices 25, thus cooling body portion 7. Block 130 then goes back to block 120.
  • Block 140 supplies devices 25 with a current -i in a second direction to generate heat inside devices 25 and heat disk 21 connected thermally to devices 25, thus heating body portion 7. Block 140 then goes back to block 120.
  • a two-way heat flow may therefore be generated from device 10 to portion 7 (heat - block 140) and from body portion 7 to device 10 (cool - block 130) until a temperature close to reference temperature To (Tmis ⁇ To) is reached and block 150 is selected.
  • Block 150 supplies devices 25 with a hold current to maintain body portion 7 beneath and within the perimeter of disk 21 at the attained predetermined temperature To .
  • the measurement is then made (block 160 downstream from block 150) and the result displayed (block 170 downstream from block 160) on a display device 40.
  • the body sensor and the detecting device for detecting chemical-physical characteristics of a body portion therefore clearly provide for eliminating the drawbacks of known devices, by the temperature of the body portion within the perimeter of disk 21 being set to temperature To prior to each measurement.
  • Sensitive portion 18 is positioned contacting the outer surface 7a of body portion 7 set to a constant temperature To.
  • the measurement is thus made independent of ambient temperature and/or the temperature of the subject, so that the results of the measurement are unaffected by extraneous factors .

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Molecular Biology (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Veterinary Medicine (AREA)
  • Medical Informatics (AREA)
  • Biophysics (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Optics & Photonics (AREA)
  • Dermatology (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)

Abstract

L'invention concerne un capteur corporel (1) constitué d'un dispositif de détection (5) muni d'une partie sensible (18) placée sur une partie du corps (7), plus précisément une partie de la peau, afin de déterminer des caractéristiques chimiques et physiques de la partie du corps; ainsi que d'un dispositif de conditionnement (10) coopérant avec le dispositif de détection (5) de manière à maintenir la partie du corps à une température déterminée (To) sensiblement constante.
PCT/IT1999/000265 1999-08-12 1999-08-12 Capteur corporel et dispositif de detection servant a detecter les caracteristiques chimiques et physiques d'une partie du corps WO2001012056A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/IT1999/000265 WO2001012056A1 (fr) 1999-08-12 1999-08-12 Capteur corporel et dispositif de detection servant a detecter les caracteristiques chimiques et physiques d'une partie du corps
AU53868/99A AU5386899A (en) 1999-08-12 1999-08-12 Body sensor and detecting device for detecting chemical-physical characteristicsof a body portion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT1999/000265 WO2001012056A1 (fr) 1999-08-12 1999-08-12 Capteur corporel et dispositif de detection servant a detecter les caracteristiques chimiques et physiques d'une partie du corps

Publications (1)

Publication Number Publication Date
WO2001012056A1 true WO2001012056A1 (fr) 2001-02-22

Family

ID=11333118

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT1999/000265 WO2001012056A1 (fr) 1999-08-12 1999-08-12 Capteur corporel et dispositif de detection servant a detecter les caracteristiques chimiques et physiques d'une partie du corps

Country Status (2)

Country Link
AU (1) AU5386899A (fr)
WO (1) WO2001012056A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981002831A1 (fr) * 1980-04-11 1981-10-15 Radiometer As Dispositif et procede de mesure de la pression partielle de l'oxygene et d'un gaz qui en solution aqueuse produit une base ou un acide
US5131391A (en) * 1989-06-22 1992-07-21 Colin Electronics Co., Ltd. Pulse oxymeter having probe with warming means
WO1998003847A2 (fr) * 1996-07-19 1998-01-29 Mills Alexander K Dispositif non invasif de calcul de parametres du sang
EP0840078A1 (fr) * 1996-11-04 1998-05-06 Luc Pira Sonde cryogénique à base d'un module Peltier

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981002831A1 (fr) * 1980-04-11 1981-10-15 Radiometer As Dispositif et procede de mesure de la pression partielle de l'oxygene et d'un gaz qui en solution aqueuse produit une base ou un acide
US5131391A (en) * 1989-06-22 1992-07-21 Colin Electronics Co., Ltd. Pulse oxymeter having probe with warming means
WO1998003847A2 (fr) * 1996-07-19 1998-01-29 Mills Alexander K Dispositif non invasif de calcul de parametres du sang
EP0840078A1 (fr) * 1996-11-04 1998-05-06 Luc Pira Sonde cryogénique à base d'un module Peltier

Also Published As

Publication number Publication date
AU5386899A (en) 2001-03-13

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