I would state it rather depends on the severity of the shock and the level of badness I anticipate, Independant of shock type. If i only need close monitoring, a radial arterial line is sufficient. However, if I need to guide therapy, I prefer using a central arterial line.

ICU (Central Venous/Arterial) Line Secrets - Part 3:

Following from where I stopped last week & if you are not already bored by parts 1 & 2, there are some additional points that may be worth noting

Here the (probably) final part begins: