Which statement about arterial catheterization is true?

Which statement about arterial catheterization is true?

• A. It is used more often as a means to directly measure blood pressure.
• B. Arteries are easier to puncture than veins.
• C. It is a more painful procedure.
• D. All of the above

Answer: (D)

Direct arterial catheterization is used to obtain a direct, continuous measurement of arterial blood pressure and to sample arterial blood quickly, which is more accurate than indirect methods. In many lab settings, arteries can be easier to locate and puncture than veins because the pulse helps identify the vessel and the artery tends to remain patent, while veins may collapse under instrumentation, making cannulation more challenging for a trained practitioner. It is more painful overall because arterial walls have more nerve fibers, and cannulation carries a higher risk of vasospasm, bleeding, and other complications, all contributing to greater discomfort. When you put these points together, they describe true aspects of arterial catheterization, so selecting all of the above is appropriate.

Direct arterial catheterization is used to obtain a direct, continuous measurement of arterial blood pressure and to sample arterial blood quickly, which is more accurate than indirect methods. In many lab settings, arteries can be easier to locate and puncture than veins because the pulse helps identify the vessel and the artery tends to remain patent, while veins may collapse under instrumentation, making cannulation more challenging for a trained practitioner. It is more painful overall because arterial walls have more nerve fibers, and cannulation carries a higher risk of vasospasm, bleeding, and other complications, all contributing to greater discomfort. When you put these points together, they describe true aspects of arterial catheterization, so selecting all of the above is appropriate.