Quick Answer. Cardiotonic drugs are substances that increase the contracting mechanism within the heart, thereby causing more blood to be pumped throughout the circulatory system. These drugs usually affect intracellular calcium levels in the heart muscle to achieve the desired increase in muscle action.
Like the name suggests, the entire CIC hearing aid fits into the ear canal. There is nothing on the outside of the ear, making it virtually unnoticeable. The CIC hearing aid is custom-made to fit into your ear canal to ensure a perfect fit.
Ear plugs and ear muffs can help prevent noise-induced hearing loss as well as decreasing exposure to loud noises. Otitis Externa Swimmer's ear (external otitis) is an infection of the skin that covers the outer ear canal.