When performing a percutaneous needle puncture of the radial artery, you get only a small spurt of blood. Which of the following is the best action at this time?
a. Slowly withdraw the needle until a pulsa-tile flow fills the syringe.
b. Pull out entirely, use a different angle and then reinsert it.
c. Slowly advance the needle until a pulsatile flow fills the syringe.
d. Repeat the procedure with a fresh blood gas kit.
Question 2
A patient suffering from traumatic brain injury in the ICU has a PtO2 (tissue oxygen) value of 10 to 15 mm Hg, what does this indicate?
a. Normal intracranial pressure
b. Ischemic brain damage
c. Normal cerebral perfusion
d. Cerebral hyperperfusion