What is a primary reason for establishing IV access in perioperative care?

• A. Hemodynamic monitoring of CVP
• B. Administering dry ice
• C. Measuring arterial oxygen tension
• D. Monitoring brain activity

Answer: (A)

Establishing IV access in the perioperative setting is primarily about enabling direct hemodynamic assessment and timely therapeutic intervention. A central venous catheter, accessed through IV lines, allows measurement of central venous pressure, which reflects right atrial pressure and preload. This real-time information helps guide fluid management and the use of vasoactive drugs during anesthesia, especially in patients at risk for hemodynamic instability or undergoing major procedures. While IV access also provides a route to administer fluids and medications, the key idea here is that CVP monitoring via a central line offers essential, actionable data to tailor intraoperative management. Other options—measuring arterial oxygen tension requires an arterial line, brain activity monitoring uses neurophysiologic equipment, and dry ice is not clinically relevant—do not serve this primary purpose.