This document discusses arterial catheterization and subclavian central venous catheter placement. It describes the anatomy and landmarks for subclavian catheterization. For arterial catheterization, it lists objectives, indications, contraindications, complications, and appropriate sites for insertion. The potential sites covered are radial, ulnar, axillary, dorsalis pedis, posterior tibial, and femoral arteries. Steps for arterial catheter placement and pressure monitoring are also outlined. The importance of removing catheters that cannot be used for pressure monitoring is emphasized.