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- Mesure avec précision l
SpO2
, la fréquence cardiaque et l
indice de
perfusion.
- Démarrage automatique de mesure après l
introduction du doigt.
- Arrêt automatique après 8 secondes sans signal.
- Alarmes visuelles et audio.
- Indicateur de batterie faible.
2.2 Principales applications et but du produit
L
oxymètre de doigt est adapté tant pour l
usage domestique que pour
l
usage hospitalier. Il peut surveiller l
SpO2
, la fréquence cardiaque et
l
indice de perfusion.
Ce dispositif n
est pas adapté à la surveillance continue.
2.3 Caractéristiques environnementales
Température de service : 5°C~40°C
Humidité de service : 30%~80%
Pression de service : 70 kPa~106 kPa
2.4 Connaissances communes sur la SpO2
1. Signication de SpO2
La
SpO2
est le pourcentage de saturation de l
oxygène dans le sang,
appelé également concentration d’O2 dans le sang; il est déni par le
pourcentage en oxyhémoglobine (HbO2) dans l’hémoglobine totale du
sang des artères.
La
SpO2
est un paramètre physiologique important qui reète la fonction
respiratoire ; il est calculé selon la formule suivante:
SpO2 = HbO2/ (HbO2 +Hb)×100%
Les HbO2 sont les oxyhémoglobines (hémoglobines oxygénées), les Hb
sont les hémoglobines qui relâchent l’oxygène.
2. Principe de la mesure
Fondée sur la loi de Beer-Lambert, l’absorption de lumière d’une subs-
tance donnée est directement proportionnelle à sa densité ou concen-
tration. Lorsque la lumière est émise avec une certaine longueur d’onde
sur le tissu humain, l’intensité mesurée de cette lumière après réexion,
absorption et atténuation sur un tissu permet de déterminer les caracté-
FRANÇAIS
4


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