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.
Notice: 1 meter (m) = 1,000 millimeters (103 mm) und 0.001 meter (m) = 1 millimeter (mm) 1 millimeter (mm) = 1000 micrometers (103 Âµm) and 1 meter (m) = 1,000,000 micrometers (106 Âµm) 1 micrometer (Âµm) = 0.000001 meter (10-6 m) = 0.001 millimeter (10-3 mm) - 1 Ã¥ (Angstrom) = 10-10 m. A micron Âµ is a metric unit of distance equal to one millionth of a meter. Micron is simply a shorter. name for the micrometer.