What components are typically found in a machine used for iontophoresis?

Iontophoresis is a therapeutic technique that uses electrical current to deliver medication through the skin. The components typically involved in a machine used for iontophoresis include a rectifier and a transformer.

The rectifier is essential because it converts alternating current (AC) into direct current (DC), which is necessary for the iontophoresis process. The direct current allows the charged ions in the medication to penetrate the skin more effectively, enhancing the treatment's efficacy.

The transformer is important as it adjusts the voltage levels to appropriate settings for iontophoresis, ensuring that the electrical output is safe and effective for clinical use. This setup allows the practitioner to manipulate the current flow and voltage to suit various treatment needs.

Considering the other choices, they relate to different functions or equipment not associated with iontophoresis. A timer and voltmeter are useful for monitoring electrical parameters, but they are not core components of an iontophoresis machine itself. Similarly, a compressor and nebulizer are used in aerosol therapies, and a magnifying lamp and steamer are typically used in facial treatments and skincare, not in delivering medications through iontophoresis. Thus, the presence of both a rectifier and a transformer is critical to the operation