Patent ID: 7917205

Claim:
An iontophoresis-based medical device comprising: a device body having a positive electrode connecting terminal and a negative electrode connecting terminal; a stick-shaped positive electrode section connected to the positive electrode connecting terminal and capable of retaining a drug solution in which an anti-microbial drug solution is dissolved therein; a stick-shaped negative electrode section connected to the negative electrode connecting terminal and capable of retaining a solution increasing the conductivity therein; and an electric circuit connecting the positive electrode section and the negative electrode section respectively with a power source, wherein the device body has a rectangular device box on which the positive electrode connecting terminal, the negative electrode connecting terminal, a voltage adjusting knob, an output changeover switch for changing over continuous conduction and a timer control, an electric conduction time knob for changing an electric conduction time, and a timer start switch are mounted, the positive electrode section is connected to the positive electrode connecting terminal via a lead line, and the negative electrode section is connected to the negative electrode connecting terminal via a lead line, a writing brush is electrically connected to a distal end of the positive electrode section, and a sponge is electrically connected to a distal end of the negative electrode section, the writing brush is impregnated with an aqueous solution of a cationic surface active agent and the sponge is impregnated with a sodium chloride solution, the writing brush is formed of a large number of blended hairs consisting of a large number of long soft hairs and a large number of short soft hairs such that the writing brush has a columnar shape at a base portion thereof and is gradually tapered toward a tip portion thereof from a middle portion thereof and the tip portion is made extremely fine to form an acute apex thus allowing the apex to touch an affected part in a pinpoint manner, and the base portion of the writing brush formed of the blended hairs is made hard and the middle portion and the tip portion of the writing brush are made soft so that air pockets are formed in the large number of hairs so as to absorb and store a drug solution in the middle portion and the tip portion of the writing brush through capillarity, whereby conductivity of electricity to the writing brush at the positive electrode section is enhanced thus easily generating iontophoresis.