Where is a common site for arterial catheterization?

The dorsalis pedis artery is a common site for arterial catheterization due to its accessibility and the importance of monitoring blood flow in the lower extremities. Located on the dorsum of the foot, this artery can be easily palpated and accessed, making it suitable for both diagnostic procedures and interventions, such as measuring arterial blood gases or administering medications.

In contrast, the proximal humerus and proximal tibia are not traditional sites for arterial catheterization. The proximal humerus is primarily involved in orthopedic procedures or in the context of vascular access, while the proximal tibia is usually associated with intraosseous access rather than direct arterial access. The subclavian vein is a site for venous catheterization rather than arterial access, making it less relevant in the context of this question.

Overall, the choice of the dorsalis pedis artery reflects its practicality and the clinical relevance in monitoring and treating vascular conditions of the feet and legs, emphasizing its importance as a common site for arterial catheterization.