Which of the Following Should Be Monitored During the Sampling

Multiple Choice

Which of the following should be monitored during the sampling of arterial blood?
1) Blood pressure proximal to puncture site
2) Presence of pulsatile blood return
3) Presence of air bubbles or clots in sample
4) Appearance of puncture site

A) 1, 2, and 3 only
B) 2, 3, and 4 only
C) 1, 2, 3, and 4
D) 2 and 3 only