During an ultrasound scan, the gel applied is called coupling medium, which is a specialized gel-like substance used specifically for ultrasound examinations.

The primary function of coupling medium is to eliminate air gaps between the probe and the skin, ensuring ultrasound waves can efficiently transmit from the probe into the body to obtain clear images. This substance is typically colorless, odorless, non-irritating, harmless to skin, and easy to clean.

During an ultrasound examination, the doctor or technician will apply a layer of coupling medium on the area to be examined. This is because ultrasound waves encounter significant resistance when traveling through air, causing signal attenuation and compromising image quality. By using coupling medium, ultrasound penetration and imaging quality are significantly improved, allowing doctors to more accurately observe internal structures and pathological conditions.

【Health Tips:】

1. The coupling medium is easily removable after the examination and can be cleaned with water or wipes.

2. Before applying the coupling gel, ensure the skin at the examination site is clean and dry to improve imaging quality.

3. The coupling gel is harmless to the skin, but if you have any history of allergies, please inform your doctor before the examination.