Grading Scale for Infiltration
1-skin blanched, edema <1 in. in any direction from site, cool to touch, with or w/out pain
2-skin blanched, edema 1-6 in., cool to touch, with or w/out pain
3-skin blanched, translucent, gross edema > 6 in., cool to touch, mild or moderate pain, possible numbness
4-skin blanched, translucent, skin tight, leaking, skin discolored, bruised, swollen, gross edema > 6 in., deep pitting tissue edema, circulatory impairment, moderate to severe pain, infiltration of any amount of blood products, vesicant, or irritant.