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.
The Twin-Pass and Twin-Pass .023 catheters (Models 5200 and 5230) are also used to. sub selectively infuse/deliver diagnostic or therapeutic agents. The Twin-Pass .023 catheter (Model 5230) is also intended to be used to measure. intra-arterial pressure within the peripheral vasculature.