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Electrical and Wave

Disabling-circuit-for-an-iontophoretic-system

Generating apparatus for providing different rated output voltages to a plurality of electric loads

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Line-powered, phase-control circuit

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Self-compensating switching power converter

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Disabling circuit for an iontophoretic system

Details

Inventors: Flower, Ronald J.;
Assignee: Drug Delivery Technologies, Inc. (New York, NY)
Primary Examiner: Bockelman; Mark
Assistant Examiner:
Attorney, Agent or Firm: Kirkpatrick & Lockhart LLP

An apparatus and a corresponding method for the iontophoretic delivery of drugs that operates only when the supply voltage is higher than a predetermined threshold is provided. The apparatus includes a current control circuit for controlling the current in an iontophoretic patch, and a supply voltage detection circuit. When a low supply voltage is detected, the current control circuit is disabled, which stops the iontophoretic current, thereby stopping the delivery of drugs.

DETAILED DESCRIPTION The present invention advantageously prevents any delivery of drugs to the patient when the power supply voltage falls below a certain level, by disabling the current control circuit upon the detection of this condition.
In one aspect of the invention, a fail-safe iontophoretic drug delivery apparatus is provided.
This apparatus includes a voltage detection circuit and an iontophoretic current control circuit.
The voltage detection circuit outputs a signal to the current control circuit when the supply voltage falls below a predetermined level, causing the current control circuit to stop supplying the iontophoretic current.

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