Iontophoresis Overview

The polarity of the electrodes in Iontophoresis is determined based on the medication being used. Each medication has a specific charge (positive or negative) and requires a corresponding electrode polarity for effective delivery.

To prevent chemical burns during Iontophoresis, the size of the cathode (negative electrode) should be larger than the anode (positive electrode). This distributes the current density more evenly, reducing localized accumulation of ions and potential burns. Additionally, increasing the distance between the electrodes further minimizes this risk.

Iontophoresis uses direct current to deliver charged medications through the skin. This method offers a safe and effective way to introduce a variety of medications into the body.

The speed at which ions enter the body via Iontophoresis is dependent on several factors. The duration of the treatment plays a crucial role, longer treatments allow for deeper penetration. The pH of the solution also impacts delivery, while a suitable pH enhances penetration. Molecular size of the solute matters, smaller molecules navigate through the skin more easily.

Iontophoresis delivers ions across the skin at a consistent rate. It primarily uses a direct current, not alternating current, for optimal delivery. While effective, the therapeutic effects of Iontophoresis may only last for a limited duration.

The active electrode in Iontophoresis features a smaller size and a higher current density. This configuration focuses the current, enhancing medication delivery to the targeted area.

Increasing the size of an electrode reduces the current density beneath it. This spreads the current over a larger area, decreasing its intensity in a specific location.

While Iontophoresis offers numerous benefits, certain conditions warrant caution. Cardiac and respiratory disorders, skin sensitivity, and proximity to the carotid sinus are considered contraindications. However, scar tissue is generally not a contraindication.