The heparin anti-Xa test is not routinely ordered but may be performed whenever a doctor wants to evaluate UFH or LMWH concentrations in the blood.It may be ordered periodically to monitor UFH therapy, especially when a doctor feels that a person is not responding as expected to UFH or when the PTT is not useful.he heparin anti-Xa test is not routinely ordered but may be performed whenever a doctor wants to evaluate UFH or LMWH concentrations in the blood.
Also known as urochrome, urobilins are the pigment that gives urine its yellow color. Urine is usually pale yellow, but it can range from clear to a deep amber color in a healthy person. The level of yellow is determined by how hydrated a person is.
Yellow - That is the normal color of urine. If your pee is too pale to see the color, it means you're over-hydrated. If you have colorless urine yet want a yellow tint, you can take a vitamin B12 capsule. Another option, which is also extremely fast, is to drink a colored energy drink. Look for one that contains added B vitamins. Amber - Dark golden urine often results from dehydration (not drinking enough water).