Device for iontophoresis

A - Human Necessities – 61 – N

Patent

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A61N 1/30 (2006.01)

Patent

CA 2363105

A device for iontophoresis capable of detecting the state of conduction accurately. A voltage compartor (10B) detects the presence of inactive current by a comparison between an output current signal (18) indicative of an inactive current flowing in the skin or the mucous membrane and a threshold level (SL) preadjusted to the voltage value corresponding to the lower inactive current. When the output current signal is higher than the threshold level, the voltage comparator produces "H" as its output signal (11B) to inform a control circuit that the state of conduction is normal. When the output current signal is lower than the threshold level, the voltage comparator produces "L" as its output signal (11B) to inform the control circuit that the state of conduction is abnormal.

L'invention concerne un dispositif d'ionophorèse capable de détecter avec précision un état de conduction. Un comparateur de tension (10B) détecte la présence d'un courant inactif par comparaison d'un signal de courant (18) de sortie indicateur de l'écoulement d'un courant inactif à travers la peau ou une muqueuse, et d'un niveau de seuil (SL) préréglé à une valeur de tension correspondant au courant inactif le plus bas. Lorsque le signal de courant de sortie est plus élevé que le niveau seuil, le comparateur de tension produit un signal de sortie (11B) H, destiné à informer un circuit de commande que l'état de conduction est normal. Lorsque le signal de courant de sortie est moins élevé que le niveau seuil, le comparateur de tension produit un signal de sortie (11B) L, destiné à informer le circuit de commande que l'état de conduction est anormal.

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