1 Capillary Refill: Push on the tip of the great toe or the nail bed until blanching occurs. 2  Then release and note how long it takes for the red color to return, a reflection of blood inflow to the distal aspect of the lower extremity. Pulses are rated on a scale ranging from 0 (not palpable) to 2+ (normal). 2  As with edema, this is very subjective and it will take you a while to develop a sense of relative values. 3  In the event that the pulse is not palpable, the doppler signal generated is also rated, ranging again from 0 to 2+.
Just how small is ânano?â In the International System of Units, the prefix nano means one-billionth, or 10-9; therefore one nanometer is one-billionth of a meter. The illustration below has three visual examples of the size and the scale of nanotechnology, showing just how small things at the nanoscale actually are.
There are 1000000000 micrometer in a kilometer. 1 Kilometer is equal to 1000000000 Micrometer. 1 km = 1000000000 um. A kilometer is among the most widely used metric units of distance and length, including the countries traditionally using the Imperial system units. One kilometer is equal to 1000 meters.