Nasal transepithelial potential difference (NPD)

A tiny electrical current in the nose linked to the movement of salt across cells.

NPD is a tiny electric current in the nose. It is created by the movement of salt in the body. NPD is lower in people with cystic fibrosis. This is because salt movement in the body is reduced. NPD can show if a medicine treats cystic fibrosis.

Back to all terms