In meicine, a port (or portacath) is a small medical appliance that is installed beneath the skin. A catheter connects the port to a vein. Under the skin, the port has a septum through which drugs can be injected and blood samples can be drawn many times, usually with less discomfort for the patient than a more typical "needle stick". Ports are used mostly to treat hematology and oncology patients, but recently ports have been adapted also for hemodialysis patients.