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.
A central venous catheter is a tube that goes into a vein in your chest and ends at your heart. Sometimes this type of catheter is attached to a device called a port that will be under your skin. The port and catheter are put in place in a minor surgery. The catheter helps carry nutrients and medicine into your body. It will also be used to take blood when you need to have blood tests.