A PICC line or central venous catheter is often placed for this purpose.

In severe cases, a person with paruresis can urinate only when alone at home or through the process of catheterization.

I went back to the States, anticipating I'd return to Europe, but the heart catheterization showed that I wasn't going anywhere further that a flight for life from Johns Hopkins Hospital.

Pulsatile tinnitus is usually objective in nature, resulting from altered blood flow, increased blood turbulence near the ear (such as from atherosclerosis, venous hum, but it can also arise as a subjective phenomenon from an increased awareness of blood flow in the ear.