Polarity exchange type iontophoresis instrument

Abstract

The invention discloses a polarity exchange type iontophoresis instrument which comprises a voltage following module, a lowpass filtering module, a current-limiting module, a signal amplification module, a signal adjusting module, a switch module, an isolation module and a control module. The voltage following module is used for increasing driving capability and comprises an element R7, an element W1 and an element U1B. The input end of the voltage following module is connected with a DA signal, the output end of the voltage following module is connected with the input end of the lowpass filtering module, and the lowpass filtering module is used for filtering out impurities in signals and comprises an element R9, an element R10, an element C3 and an element C4. The output end of the lowpass filtering module is connected with the current-limiting module. The polarity exchange type iontophoresis instrument can perform iontophoresis on ionic medicines of different polarities in an identical electrode and perform deep iontophoresis, the best treatment effect can be achieved, and the possibility of chemical burns to the skin surface is avoided.

Description

technical field [0001] The invention relates to the technical field of ion introduction instruments, in particular to a polarity exchange type ion introduction instrument. Background technique [0002] At present, the known directional drug penetration instruments all use the principle of ion-conducting drugs. In the drug solution, a part of the drug dissociates into ions. The directional drug penetration instrument has two electrode plates. After the drug solution is dropped on the electrode plates, an electric field is applied. Under the action of direct current, anions and cations move in a directional manner. If the cathode drug contains negatively charged drug ions or the anode drug contains positively charged drug ions, it will move toward the human body and enter the body. The therapeutic effect can only be achieved by introducing two kinds of ions from a single electrode at the same time, while the general iontophoresis device outputs a unipolar DC pulse or a zero-cr...

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Problems solved by technology

[0002] At present, the known directional drug penetration instruments all use the principle of ion-conducting drugs. In the drug solution, a part of the drug dissociates into ions. The directional drug penetration instrument has two electrode plates. After the drug solution is dropped on the electrode plates, an electric field is applied. Under the action of direct current, anions and cations move in a directional manner. If the cathode drug contains negatively charged drug ions or the anode drug contains positively charged drug ions, it will move toward the human body and enter the body. The therapeutic effect can only be achieved by introducing two kinds of ions from a single electrode at the same time, while the general iontophoresis device outputs a unipolar DC pulse or a zero-crossing pulse. In the presence of a unipolar DC pulse, only drug ions of the same polarity can be introduced from a single electrode. At the same time, due to the long-term unidirectional current, the single-polarity ions are enriched in the same skin part, which increases the possibility of chemical burns on the skin surface, and the zero-crossing pulse exists because the DC current exists for a short time and the current polarity Fast switching, resulting in too shallow drug introduction, can not achieve the best therapeutic effect

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