Just start with the top of the body and work down.....................
You can go into as depth as you want for each, if you are working in a neuro ICU, you will be spending much more time on that.
CVICU will be much more cardiac related.
Basics always to consider in any patient:
Are they awake and alert? Are they neurologically intact? Strong grips and pushes?
What do the pulses feel like throughout? Any edema? Do heart tones sound regular? Capillary refill? Are there pedal pulses? Are there [posterior tibials?
Are resp even, easy, and regular? Is supplemental oxygen being used?
What do the breath sounds sound like?
Abdomen: is it soft and non-tender? bowel sounds present x 4 qudrants?
Are they voiding adequately, color of urine if necessary, do they have a foley?
Hope that this helps and makes it easier for you....................