What is the preferred site for a peripheral IV in adults?

The choice of forearm veins as the preferred site for a peripheral IV in adults is justified by several important factors. Firstly, the veins in the forearm, specifically the cephalic vein and basilic vein, are generally larger and more accessible than veins in other anatomical locations. This makes them easier to puncture and more suitable for maintaining intravenous access.

Additionally, forearm veins tend to have fewer associated complications compared to other sites. For example, using veins in the foot can increase the risk of complications such as phlebitis or thrombosis, given that the veins in the foot are typically smaller and less frequently used, leading to potential discomfort for the patient. Furthermore, the forearm provides a more stable site for IV insertion, as it can be easily immobilized during the procedure and while the IV is in place.

Scalp veins are typically reserved for pediatric patients and are not normally used in adults due to their anatomical location and the risk of complications. Similarly, spinal veins do not provide a practical site for peripheral IV access. Thus, the forearm veins represent the most reliable and safest choice for administering IV therapy in adult patients.