WO2013104629A1 - Oximeter - Google Patents

Oximeter Download PDF

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Publication number
WO2013104629A1
WO2013104629A1 PCT/EP2013/050230 EP2013050230W WO2013104629A1 WO 2013104629 A1 WO2013104629 A1 WO 2013104629A1 EP 2013050230 W EP2013050230 W EP 2013050230W WO 2013104629 A1 WO2013104629 A1 WO 2013104629A1
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WO
WIPO (PCT)
Prior art keywords
ring
photoreceptor
oximeter
finger
diode
Prior art date
Application number
PCT/EP2013/050230
Other languages
French (fr)
Inventor
Philippe Renaudin
Jean-Bernard DUMAND
Cédric SAAB
Clément GASCHET
Adrien RENAULT
Original Assignee
Kaptalia Monitoring
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 Kaptalia Monitoring filed Critical Kaptalia Monitoring
Publication of WO2013104629A1 publication Critical patent/WO2013104629A1/en

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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
    • A61B5/1455—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
    • A61B5/14551—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 for measuring blood gases
    • A61B5/14552—Details of sensors specially adapted therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/6813—Specially adapted to be attached to a specific body part
    • A61B5/6825—Hand
    • A61B5/6826—Finger
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/02—Details of sensors specially adapted for in-vivo measurements
    • A61B2562/0233—Special features of optical sensors or probes classified in A61B5/00
    • A61B2562/0238—Optical sensor arrangements for performing transmission measurements on body tissue

Definitions

  • the present invention relates to an oximeter, also called a saturometer.
  • Pulse oximetry is a non-invasive and continuous measurement of arterial oxygen saturation of hemoglobin. It can quickly detect oxygen deficiency before the appearance of clinical signs.
  • the measurement of oximetry can be performed at different organs of the patient, and more particularly at the end of a finger, a toe, an ear lobe, etc.
  • An oximeter has two light-emitting diodes, one emitting a light beam of red light and the other emitting a light beam of infrared light (respectively 660 and 994 nm), and a photoreceptor which measures the absorption of these light-emitting diodes.
  • light beams by the pulsatile flow The absorption of red and infrared light beams varies depending on whether these light beams encounter reduced non-oxygenated hemoglobin (Hb) or oxyhemoglobin (Hb0 2 ).
  • the information collected by the photoreceptor is then transmitted to a monitoring center, such as a medical surveillance device for example.
  • a monitoring center such as a medical surveillance device for example.
  • a first oximeter model takes the form of a finger-grip that squeezes the end of the patient's finger. Such an oximeter is bulky and hardly remains in place if the patient is agitated.
  • a second oximeter model takes the form of two plasters. In the first plaster are integrated electroluminescent diodes, and in the second plaster is integrated the photoreceptor. Such an oximeter is more stable but it can not be used several times.
  • Oximeters in the form of a ring are also known.
  • An object of the present invention is to provide an oximeter which remains in place on the patient even if it is agitated, which can be reused and which has better performance.
  • an oximeter comprising a ring and an electronic module fixed to the ring,
  • the electronic module comprising at least one light-emitting diode and a photoreceptor
  • the ring having a housing in which houses the electronic module and a ring for slipping on a finger of a patient, said ring being made of a flexible material,
  • the ring having two recesses, each extending between the housing and a window formed on the inner face of the ring, one of the recesses being intended to house the diode or diodes, and the other recess being intended to house the photoreceptor, the window associated with the diode or diodes being arranged in such a way that the diode (s) emit light beams through it, and the window associated with the photoreceptor being arranged in such a way that the photoreceptor receives the light beams emitted by the diode (s) after they have crossed the finger,
  • the ring being split into two arcs and the free end of each arc being curved towards the inside of the ring.
  • the windows are placed vis-a-vis on a transverse axis left-right of the finger.
  • the split is carried out at the lower part of the ring in the plane of symmetry of the oximeter passing through the axis of the ring.
  • each window is closed by a transparent plate in the wavelengths used.
  • FIG. 1 represents an oximeter according to the invention
  • FIG. 2 is a side view of the oximeter of FIG. 1
  • FIG. 3 is a bottom view of the oximeter of FIG. 1, and
  • FIG. 4 is a section along the line IV-IV of FIG. 3.
  • Fig. 1 shows an oximeter 100 which comprises a ring 102 and an electronic module (401, Fig. 4) and which is fixed to the ring 102.
  • the ring 102 has a ring 106 for slipping on the finger of a patient and a housing 104 in which is housed the electronic module 401.
  • FIG. 2 shows the oximeter 100 in side view, i.e. in the axis of the ring 102
  • FIG. 3 shows the oximeter 100 in a view from below
  • Fig. 4 is a sectional side view of the oximeter 100.
  • the electronic module 401 has two light-emitting diodes 403, one emitting a light beam of red light and the other emitting an infrared light beam (respectively 660 and 994 nm) and a photoreceptor 405.
  • the electronic module 401 also comprises means necessary for controlling the diodes, the means necessary for receiving the information emitted by the photoreceptor, as well as the means necessary for transmitting this information to a monitoring center, such as a medical monitoring device for example.
  • the electronic module 401 also comprises a power source and the means necessary for the transmission are for example wireless communication means.
  • the ring 106 is made of a flexible material such as silicone to fit the shape of the patient's finger on which it is threaded.
  • the ring 106 has two recesses 402a and 402b.
  • One of the recesses 402a is intended to house the two diodes 403, and the other recess 402b is intended to house the photoreceptor 405.
  • Each recess 402a, 402b extends in the ring 106 and opens on the one hand into the housing 104, and on the other hand at the inner face of the ring 106 via a window 404a, 404b.
  • the openings between the recesses 402a and 402b and the housing 104 allow the passage of the two diodes 403, and the photoreceptor 405 during the introduction of the electronic module 401.
  • the window 404a is arranged so that the diodes 403 emit the light beams therethrough, and the window 404b is arranged such that the photoreceptor 405 receives the light beams therethrough.
  • the windows 404a and 404b are arranged so that when the oximeter 100 is threaded to the proximal phalanx of the patient's finger, the light beams emitted by the diodes 403 pass through the finger and are picked up by the photoreceptor 405 thus allowing the measurement of oximetry.
  • Such an oximeter 100 is therefore reusable and is maintained very well in place because of the presence of the ring 106.
  • the windows 404a and 404b and therefore, the diodes 403 and the photoreceptor 405 are placed vis-à-vis along a left-right transverse axis of the finger.
  • the light beams are thus recovered near the proximal phalanx without distinction of finger.
  • This area is less irrigated than the pulp of the finger which is an excellent pulsatile vascular bed, but it is less subject to the phenomenon of vasoconstriction of the vessels, which is a limiting factor of the measurement of oximetry.
  • the ring 106 is split into two arcs 208a and 208b.
  • the split of the ring 106 is performed at the lower part of the ring 106, that is to say the part under the finger when the oximeter 100 is in place.
  • the split is carried out in the plane of symmetry of the oximeter 100 passing through the axis of the ring 106.
  • each arc 208a, 208b of the ring 106 can freely deviate and thus marry the shape of the finger without risk of ischemia for the finger and this regardless of the dimensions of the latter, as long as they are larger than the inner dimensions of the ring 106.
  • the material constituting the ring 106 is flexible and is preferably a silicone because it is biocompatible, transparent or possibly colorable and can receive additives. Silicone is also a thermal and electrical insulator and it resists heat while maintaining its physicochemical properties.
  • the flexibility of the silicone can be modulated according to the needs.
  • the silicone has a hardness of the order of 50 Sh A which can vary from + or - 20 Sh A. Such an order of magnitude is adapted to the comfort of the patient since the finger is not too tight and the arterial pulsation signal is not decreased, and the good maintenance of the oximeter 100 on the finger so that the diodes 403 and the photoreceptor 405 remain correctly positioned despite the movements of the patient.
  • the free end each arc 208a, 208b is bent inwardly of the ring 106, that is to say towards the upper part of the oximeter 100 carrying the electronic module 401.
  • each free end exerts pressure on the flesh of the finger and tends to raise the flesh to fill the inside of the ring 106 and press against the diodes 403 and the photoreceptor 405 to improve the measurement.
  • the diodes 403 are housed in one of the arcs 208a and the photoreceptor 405 housed in the other arc 208b.
  • the angular orientations of the diodes 403 and of the photoreceptor 405 are such that, on small volume fingers, the emitted light beams converge towards the flesh of the finger, and for the fingers of larger volume, the spacing of the two arcs 208a and 208b allows an adaptation of the angular orientations of the diodes 403 and the photoreceptor 405 so that the emitted light beams remain centered on the flesh.
  • each window 404a, 404b is closed by a transparent plate in the wavelengths used.
  • the transparent plate may be a web from the material constituting the ring 106 if it is transparent, or a plexiglass plate stuck in the window 404a, 404b.
  • the present invention is not limited to the examples and embodiments described and shown, but it is capable of many variants accessible to those skilled in the art.

Abstract

The invention relates to an oximeter (100) comprising a ring (102) and an electronic module (401) attached to the ring (102), said electronic module (401) comprising at least one light-emitting diode (403) and a photoreceptor (405). The ring (102) includes a cavity (104) in which the electronic module (401) is housed and a ring band (106) to be slipped onto the finger of a patient, said band (106) being made from a flexible material. The band (106) includes two recesses (402a, 402b), each of which extends between the cavity (104) and a window (404a, 404b) provided on the inner surface of the band (106), wherein one (402a) of the recesses is intended to house the diode(s) (403) and the other recess (402b) is intended to house the photoreceptor (405). The window (404a) associated with the diode(s) (403) is arranged such that the diode(s) (403) emit light beams therethrough, and the window (404b) associated with the photoreceptor (405) is arranged such that the photoreceptor (405) receives the light beams emitted by the diode(s) (403) after said light beams have passed through the finger. The band (106) is split into two arcs (208a, 208b) and the free end of each arc (208a, 208b) is curved toward the inside of the ring band (106).

Description

Oxymètre  oximeter
La présente invention concerne un oxymètre, également appelé saturomètre.The present invention relates to an oximeter, also called a saturometer.
L'oxymétrie du pouls permet de mesurer de façon non invasive et continue la saturation artérielle en oxygène de l'hémoglobine. Elle permet de détecter rapidement les carences en oxygène avant l'apparition des signes cliniques. Pulse oximetry is a non-invasive and continuous measurement of arterial oxygen saturation of hemoglobin. It can quickly detect oxygen deficiency before the appearance of clinical signs.
La mesure d'oxymétrie peut s'effectuer au niveau de différents organes du patient, et plus particulièrement au bout d'un doigt, d'un orteil, d'un lobe d'oreille, etc.  The measurement of oximetry can be performed at different organs of the patient, and more particularly at the end of a finger, a toe, an ear lobe, etc.
Un oxymètre comporte deux diodes électroluminescentes, l'une émettrice d'un faisceau lumineux de lumière rouge et l'autre émettrice d'un faisceau lumineux de lumière infrarouge (respectivement 660 et 994 nm), et un photorécepteur qui mesure l'absorption de ces faisceaux lumineux par le flux pulsatile. Les absorptions des faisceaux lumineux de lumières rouge et infrarouge sont variables selon que ces faisceaux lumineux rencontrent de l'hémoglobine réduite (Hb) non oxygénée ou de l'oxyhémoglobine (Hb02). An oximeter has two light-emitting diodes, one emitting a light beam of red light and the other emitting a light beam of infrared light (respectively 660 and 994 nm), and a photoreceptor which measures the absorption of these light-emitting diodes. light beams by the pulsatile flow. The absorption of red and infrared light beams varies depending on whether these light beams encounter reduced non-oxygenated hemoglobin (Hb) or oxyhemoglobin (Hb0 2 ).
Les informations relevées par le photorécepteur sont ensuite transmises à un centre de surveillance, tel qu'un appareil de surveillance médicale par exemple. Il existe actuellement différents modèles d'oxymètres. Les modèles les plus répandus se fixent au niveau de l'extrémité distale d'un doigt. The information collected by the photoreceptor is then transmitted to a monitoring center, such as a medical surveillance device for example. There are currently different models of oximeters. The most common models are attached to the distal end of a finger.
Un premier modèle d'oxymètre prend la forme d'un pince-doigt qui vient serrer l'extrémité du doigt du patient. Un tel oxymètre est volumineux et reste difficilement en place si le patient est agité.  A first oximeter model takes the form of a finger-grip that squeezes the end of the patient's finger. Such an oximeter is bulky and hardly remains in place if the patient is agitated.
Un deuxième modèle d'oxymètre prend la forme de deux sparadraps. Dans le premier sparadrap sont intégrées les diodes électroluminescentes, et dans le deuxième sparadrap est intégré le photorécepteur. Un tel oxymètre est plus stable mais il ne peut pas être utilisé plusieurs fois.  A second oximeter model takes the form of two plasters. In the first plaster are integrated electroluminescent diodes, and in the second plaster is integrated the photoreceptor. Such an oximeter is more stable but it can not be used several times.
On connaît également des oxymètres sous forme de bague.  Oximeters in the form of a ring are also known.
Un objet de la présente invention est de proposer un oxymètre qui reste en place sur le patient même si celui-ci est agité, qui peut être réutilisé et qui présente de meilleures performances.  An object of the present invention is to provide an oximeter which remains in place on the patient even if it is agitated, which can be reused and which has better performance.
A cet effet, est proposé un oxymètre comportant une bague et un module électronique fixé à la bague,  For this purpose, an oximeter is proposed comprising a ring and an electronic module fixed to the ring,
- le module électronique comportant au moins une diode électroluminescente et un photorécepteur,  the electronic module comprising at least one light-emitting diode and a photoreceptor,
- la bague présentant un logement dans lequel loge le module électronique et un anneau destiné à s'enfiler sur un doigt d'un patient, ledit anneau étant réalisé dans un matériau souple,  - The ring having a housing in which houses the electronic module and a ring for slipping on a finger of a patient, said ring being made of a flexible material,
l'anneau présentant deux évidements, chacun s'étendant entre le logement et une fenêtre réalisée sur la face intérieure de l'anneau, l'un des évidements étant destiné à loger la ou les diodes, et l'autre évidement étant destiné à loger le photorécepteur, la fenêtre associée à la ou les diodes étant disposée de manière à ce que la ou les diodes émettent des faisceaux lumineux à travers elle, et la fenêtre associée au photorécepteur étant disposée de manière à ce que le photorécepteur reçoive les faisceaux lumineux émis par la ou les diodes après qu'ils ont traversé le doigt,  the ring having two recesses, each extending between the housing and a window formed on the inner face of the ring, one of the recesses being intended to house the diode or diodes, and the other recess being intended to house the photoreceptor, the window associated with the diode or diodes being arranged in such a way that the diode (s) emit light beams through it, and the window associated with the photoreceptor being arranged in such a way that the photoreceptor receives the light beams emitted by the diode (s) after they have crossed the finger,
l'anneau étant scindé en deux arcs et l'extrémité libre de chaque arc étant recourbée vers l'intérieur de l'anneau.  the ring being split into two arcs and the free end of each arc being curved towards the inside of the ring.
Avantageusement, les fenêtres sont placées en vis-à-vis selon un axe transversal gauche-droit du doigt.  Advantageously, the windows are placed vis-a-vis on a transverse axis left-right of the finger.
Avantageusement, la scission est réalisée au niveau de la partie inférieure de l'anneau dans le plan de symétrie de l'oxymètre passant par l'axe de l'anneau. Avantageusement, chaque fenêtre est obturée par une plaque transparente dans les longueurs d'ondes utilisées. Advantageously, the split is carried out at the lower part of the ring in the plane of symmetry of the oximeter passing through the axis of the ring. Advantageously, each window is closed by a transparent plate in the wavelengths used.
Les caractéristiques de l'invention mentionnées ci-dessus, ainsi que d'autres, apparaîtront plus clairement à la lecture de la description suivante d'un exemple de réalisation, ladite description étant faite en relation avec les dessins joints, parmi lesquels :  The characteristics of the invention mentioned above, as well as others, will appear more clearly on reading the following description of an exemplary embodiment, said description being given in relation to the attached drawings, among which:
la Fig. 1 représente un oxymètre selon l'invention,  FIG. 1 represents an oximeter according to the invention,
la Fig. 2 est une vue latérale de l'oxymètre de la Fig. 1,  FIG. 2 is a side view of the oximeter of FIG. 1
la Fig. 3 est une vue de dessous de l'oxymètre de la Fig. 1, et  FIG. 3 is a bottom view of the oximeter of FIG. 1, and
la Fig. 4 est une coupe selon la ligne IV-IV de la Fig. 3.  FIG. 4 is a section along the line IV-IV of FIG. 3.
La Fig. 1 montre un oxymètre 100 qui comporte une bague 102 et un module électronique (401, Fig. 4) et qui se fixe à la bague 102.  Fig. 1 shows an oximeter 100 which comprises a ring 102 and an electronic module (401, Fig. 4) and which is fixed to the ring 102.
La bague 102 présente un anneau 106 destiné à s'enfiler sur le doigt d'un patient et un logement 104 dans lequel vient se loger le module électronique 401.  The ring 102 has a ring 106 for slipping on the finger of a patient and a housing 104 in which is housed the electronic module 401.
La Fig. 2 montre l'oxymètre 100 en vue de côté c'est-à-dire dans l'axe de la bague 102, et la Fig. 3 montre l'oxymètre 100 en vue de dessous. La Fig. 4 est une vue de côté en coupe de l'oxymètre 100.  Fig. 2 shows the oximeter 100 in side view, i.e. in the axis of the ring 102, and FIG. 3 shows the oximeter 100 in a view from below. Fig. 4 is a sectional side view of the oximeter 100.
Le module électronique 401 présente deux diodes électroluminescentes 403, l'une émettrice d'un faisceau lumineux de lumière rouge et l'autre émettrice d'un faisceau lumineux de lumière infrarouge (respectivement 660 et 994 nm) et un photorécepteur 405. Le module électronique 401 comporte également des moyens nécessaires à la commande des diodes, des moyens nécessaires à la réception des informations émises par le photorécepteur, ainsi que des moyens nécessaires à la transmission de ces informations vers un centre de surveillance, tel qu'un appareil de surveillance médicale par exemple. Le module électronique 401 comporte également une source d'énergie et les moyens nécessaires à la transmission sont par exemple des moyens de communication sans fil.  The electronic module 401 has two light-emitting diodes 403, one emitting a light beam of red light and the other emitting an infrared light beam (respectively 660 and 994 nm) and a photoreceptor 405. The electronic module 401 also comprises means necessary for controlling the diodes, the means necessary for receiving the information emitted by the photoreceptor, as well as the means necessary for transmitting this information to a monitoring center, such as a medical monitoring device for example. The electronic module 401 also comprises a power source and the means necessary for the transmission are for example wireless communication means.
L'anneau 106 est réalisé dans un matériau souple tel que du silicone afin de s'adapter à la forme du doigt du patient sur lequel il est enfilé.  The ring 106 is made of a flexible material such as silicone to fit the shape of the patient's finger on which it is threaded.
L'anneau 106 présente deux évidements 402a et 402b. L'un des évidements 402a est destiné à loger les deux diodes 403, et l'autre évidement 402b est destiné à loger le photorécepteur 405. Chaque évidement 402a, 402b s'étend dans l'anneau 106 et débouche d'une part dans le logement 104, et d'autre part au niveau de la face intérieure de l'anneau 106 par l'intermédiaire d'une fenêtre 404a, 404b. The ring 106 has two recesses 402a and 402b. One of the recesses 402a is intended to house the two diodes 403, and the other recess 402b is intended to house the photoreceptor 405. Each recess 402a, 402b extends in the ring 106 and opens on the one hand into the housing 104, and on the other hand at the inner face of the ring 106 via a window 404a, 404b.
Les ouvertures entre les évidements 402a et 402b et le logement 104 permettent le passage des deux diodes 403, et du photorécepteur 405 lors de la mise en place du module électronique 401.  The openings between the recesses 402a and 402b and the housing 104 allow the passage of the two diodes 403, and the photoreceptor 405 during the introduction of the electronic module 401.
La fenêtre 404a est disposée de manière à ce que les diodes 403 émettent les faisceaux lumineux à travers elle, et la fenêtre 404b est disposée de manière à ce que le photorécepteur 405 reçoive les faisceaux lumineux la traversant. En outre, les fenêtres 404a et 404b sont disposées de manière à ce que lorsque l'oxymètre 100 est enfilé jusqu'à la phalange proximale du doigt du patient, les faisceaux lumineux émis par les diodes 403 traversent le doigt et sont captés par le photorécepteur 405 permettant ainsi la mesure de l'oxymétrie.  The window 404a is arranged so that the diodes 403 emit the light beams therethrough, and the window 404b is arranged such that the photoreceptor 405 receives the light beams therethrough. In addition, the windows 404a and 404b are arranged so that when the oximeter 100 is threaded to the proximal phalanx of the patient's finger, the light beams emitted by the diodes 403 pass through the finger and are picked up by the photoreceptor 405 thus allowing the measurement of oximetry.
Un tel oxymètre 100 est donc réutilisable et est maintenu très bien en place du fait de la présence de l'anneau 106.  Such an oximeter 100 is therefore reusable and is maintained very well in place because of the presence of the ring 106.
Pour une meilleure prise de mesure de l'oxymétrie, les fenêtres 404a et 404b et par conséquent, les diodes 403 et le photorécepteur 405 sont placés en vis-à-vis selon un axe transversal gauche-droit du doigt.  For better measurement of the oximetry, the windows 404a and 404b and therefore, the diodes 403 and the photoreceptor 405 are placed vis-à-vis along a left-right transverse axis of the finger.
Les faisceaux lumineux sont ainsi récupérés à proximité de la phalange proximale sans distinction de doigt. Cette zone est moins irriguée que la pulpe du doigt qui est un excellent lit vasculaire pulsatile, mais elle est moins assujettie au phénomène de vasoconstriction des vaisseaux, qui est un facteur limitant de la mesure d'oxymétrie.  The light beams are thus recovered near the proximal phalanx without distinction of finger. This area is less irrigated than the pulp of the finger which is an excellent pulsatile vascular bed, but it is less subject to the phenomenon of vasoconstriction of the vessels, which is a limiting factor of the measurement of oximetry.
Pour faciliter l'adaptation de l'anneau 106 à la plupart des doigts, l'anneau 106 est scindé en deux arcs 208a et 208b. La scission de l'anneau 106 est réalisée au niveau de la partie inférieure de l'anneau 106, c'est-à-dire la partie qui se trouve sous le doigt lorsque l'oxymètre 100 est en place. La scission est réalisée dans le plan de symétrie de l'oxymètre 100 passant par l'axe de l'anneau 106.  To facilitate the adaptation of the ring 106 to most of the fingers, the ring 106 is split into two arcs 208a and 208b. The split of the ring 106 is performed at the lower part of the ring 106, that is to say the part under the finger when the oximeter 100 is in place. The split is carried out in the plane of symmetry of the oximeter 100 passing through the axis of the ring 106.
Du fait de la souplesse du matériau utilisé, chaque arc 208a, 208b de l'anneau 106 peut librement s'écarter et ainsi épouser la forme du doigt sans risque d'ischémie pour le doigt et ceci quelles que soient les dimensions de ce dernier, tant qu'elles sont supérieures aux dimensions intérieures de l'anneau 106.  Due to the flexibility of the material used, each arc 208a, 208b of the ring 106 can freely deviate and thus marry the shape of the finger without risk of ischemia for the finger and this regardless of the dimensions of the latter, as long as they are larger than the inner dimensions of the ring 106.
Afin de faciliter l'adhérence des arcs 208 et 208b au doigt, ils sont amincis à leurs extrémités libres afin de les assouplir. Comme précisé ci-dessus, le matériau constituant l'anneau 106 est souple et est de préférence un silicone car il est biocompatible, transparent ou éventuellement colorable et il peut recevoir des additifs. Le silicone est également un isolant thermique et électrique et il résiste à la chaleur tout en conservant ses propriétés physico-chimiques. In order to facilitate the adhesion of the arches 208 and 208b to the finger, they are thinned at their free ends in order to soften them. As specified above, the material constituting the ring 106 is flexible and is preferably a silicone because it is biocompatible, transparent or possibly colorable and can receive additives. Silicone is also a thermal and electrical insulator and it resists heat while maintaining its physicochemical properties.
En outre, la souplesse du silicone peut être modulée en fonction des besoins. Dans un mode de réalisation préféré de l'invention, le silicone présente une dureté de l'ordre de 50 Sh A qui peut varier de + ou - 20 Sh A. Un tel ordre de grandeur est adapté au confort du patient puisque le doigt n'est pas trop serré et le signal des pulsations artérielles n'est pas diminué, et au bon maintien de l'oxymètre 100 sur le doigt afin que les diodes 403 et le photorécepteur 405 restent correctement positionnés malgré les mouvements du patient.  In addition, the flexibility of the silicone can be modulated according to the needs. In a preferred embodiment of the invention, the silicone has a hardness of the order of 50 Sh A which can vary from + or - 20 Sh A. Such an order of magnitude is adapted to the comfort of the patient since the finger is not too tight and the arterial pulsation signal is not decreased, and the good maintenance of the oximeter 100 on the finger so that the diodes 403 and the photoreceptor 405 remain correctly positioned despite the movements of the patient.
Pour assurer que la peau du doigt est bien en contact avec les diodes 403 et le photorécepteur 405 et ainsi éviter les interférences lumineuses dues par exemple à la réception par le photorécepteur 405 de faisceaux lumineux n'ayant pas traversé le doigt, l'extrémité libre de chaque arc 208a, 208b est recourbée vers l'intérieur de l'anneau 106, c'est-à-dire vers la partie haute de l'oxymètre 100 portant le module électronique 401.  To ensure that the skin of the finger is in contact with the diodes 403 and the photoreceptor 405 and thus avoid light interference due for example to the reception by the photoreceptor 405 of light beams that have not passed through the finger, the free end each arc 208a, 208b is bent inwardly of the ring 106, that is to say towards the upper part of the oximeter 100 carrying the electronic module 401.
Ainsi, chaque extrémité libre exerce une pression sur la chair du doigt et tend à remonter cette chair afin de remplir l'intérieur de l'anneau 106 et la plaquer contre les diodes 403 et le photorécepteur 405 pour améliorer la prise de mesure.  Thus, each free end exerts pressure on the flesh of the finger and tends to raise the flesh to fill the inside of the ring 106 and press against the diodes 403 and the photoreceptor 405 to improve the measurement.
Les diodes 403 sont logées dans l'un des arcs 208a et le photorécepteur 405 logé dans l'autre arc 208b.  The diodes 403 are housed in one of the arcs 208a and the photoreceptor 405 housed in the other arc 208b.
Les orientations angulaires des diodes 403 et du photorécepteur 405 sont telles que sur les doigts de petit volume, les faisceaux lumineux émis convergent vers la chair du doigt, et pour les doigts de plus gros volume, l'écartement des deux arcs 208a et 208b permet une adaptation des orientations angulaires des diodes 403 et du photorécepteur 405 de manière à ce que les faisceaux lumineux émis restent centrés sur la chair.  The angular orientations of the diodes 403 and of the photoreceptor 405 are such that, on small volume fingers, the emitted light beams converge towards the flesh of the finger, and for the fingers of larger volume, the spacing of the two arcs 208a and 208b allows an adaptation of the angular orientations of the diodes 403 and the photoreceptor 405 so that the emitted light beams remain centered on the flesh.
Pour éviter que des salissures se déposent sur les diodes 403 et le photorécepteur To prevent dirt from getting on the 403 diodes and the photoreceptor
405, chaque fenêtre 404a, 404b est obturée par une plaque transparente dans les longueurs d'ondes utilisées. La plaque transparente peut être un voile issu du matériau constituant l'anneau 106 s'il est transparent, ou une plaque de plexiglas collée dans la fenêtre 404a, 404b. Bien entendu, la présente invention n'est pas limitée aux exemples et modes de réalisation décrits et représentés, mais elle est susceptible de nombreuses variantes accessibles à l'homme de l'art. 405, each window 404a, 404b is closed by a transparent plate in the wavelengths used. The transparent plate may be a web from the material constituting the ring 106 if it is transparent, or a plexiglass plate stuck in the window 404a, 404b. Of course, the present invention is not limited to the examples and embodiments described and shown, but it is capable of many variants accessible to those skilled in the art.

Claims

REVENDICATIONS
1) Oxymètre (100) comportant une bague (102) et un module électronique (401) fixé à la bague (102), 1) Oximeter (100) comprising a ring (102) and an electronic module (401) fixed to the ring (102),
- le module électronique (401) comportant au moins une diode électroluminescente (403) et un photorécepteur (405),  the electronic module (401) comprising at least one light-emitting diode (403) and a photoreceptor (405),
- la bague (102) présentant un logement (104) dans lequel loge le module électronique (401) et un anneau (106) destiné à s'enfiler sur un doigt d'un patient, ledit anneau (106) étant réalisé dans un matériau souple,  - the ring (102) having a housing (104) in which houses the electronic module (401) and a ring (106) for slipping on a finger of a patient, said ring (106) being made of a material flexible,
l'anneau (106) présentant deux évidements (402a, 402b), chacun s'étendant entre le logement (104) et une fenêtre (404a, 404b) réalisée sur la face intérieure de l'anneau (106), l'un des évidements (402a) étant destiné à loger la ou les diodes (403), et l'autre évidement (402b) étant destiné à loger le photorécepteur (405),  the ring (106) having two recesses (402a, 402b), each extending between the housing (104) and a window (404a, 404b) formed on the inner face of the ring (106), one of recesses (402a) for accommodating the one or more diodes (403), and the other recess (402b) for accommodating the photoreceptor (405),
la fenêtre (404a) associée à la ou les diodes (403) étant disposée de manière à ce que la ou les diodes (403) émettent des faisceaux lumineux à travers elle, et la fenêtre (404b) associée au photorécepteur (405) étant disposée de manière à ce que le photorécepteur (405) reçoive les faisceaux lumineux émis par la ou les diodes (403) après qu'ils ont traversé le doigt,  the window (404a) associated with the at least one diode (403) being disposed in such a manner that the at least one diode (403) emits light beams therethrough, and the window (404b) associated with the photoreceptor (405) being arranged in such a way that the photoreceptor (405) receives the light beams emitted by the diode (s) (403) after they have passed through the finger,
l'anneau (106) étant scindé en deux arcs (208a, 208b) et l'extrémité libre de chaque arc (208a, 208b) étant recourbée vers l'intérieur de l'anneau (106).  the ring (106) being split into two arcs (208a, 208b) and the free end of each arc (208a, 208b) being bent inwardly of the ring (106).
2) Oxymètre (100) selon la revendication 1, caractérisé en ce que les fenêtres (404a, 404b) sont placées en vis-à-vis selon un axe transversal gauche-droit du doigt. 2) Oximeter (100) according to claim 1, characterized in that the windows (404a, 404b) are placed vis-à-vis a transverse axis left-right finger.
3) Oxymètre (100) selon l'une des revendications 1 ou 2, caractérisé en ce que la scission est réalisée au niveau de la partie inférieure de l'anneau (106) dans le plan de symétrie de l'oxymètre (100) passant par l'axe de l'anneau (106). 3) Oximeter (100) according to one of claims 1 or 2, characterized in that the split is performed at the lower part of the ring (106) in the plane of symmetry of the oximeter (100) passing by the axis of the ring (106).
4) Oxymètre (100) selon l'une des revendications 1 à 3, caractérisé en ce que chaque fenêtre (404a, 404b) est obturée par une plaque transparente dans les longueurs d'ondes utilisées. 4) Oximeter (100) according to one of claims 1 to 3, characterized in that each window (404a, 404b) is closed by a transparent plate in the wavelengths used.
PCT/EP2013/050230 2012-01-13 2013-01-08 Oximeter WO2013104629A1 (en)

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FR1250332A FR2985656B1 (en) 2012-01-13 2012-01-13 OXYMETER

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