1. Definition of adherence. In terms of TB control, adherence to treatment may be defined as the extent to which the patient's history of therapeutic drug-taking coincides with the prescribed treatment (7) . Adherence may be measured using either process-oriented or outcome-oriented definitions.
In general, peripheral catheters are preferred when IV access is required for shorter periods, when direct access to the central circulation is unnecessary, and when smaller gauge catheters suffice. Peripheral access is generally safer, easier to obtain, and less painful than central access.
Central Venous Catheters. What is a central venous catheter? A central venous catheter, also called a central line, is a long, thin, flexible tube used to give medicines, fluids, nutrients, or blood products over a long period of time, usually several weeks or more. A catheter is often inserted in the arm or chest through the skin into a large vein.