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.
The normal color of urine can range from a translucent yellow to amber. It is a sterile liquid that is expelled from the body and is a product of cellular metabolism. The appearance of your urine can be affected by certain foods you eat, beverages you drink and diseases that you may be afflicted by. The yellow to amber color that normal urine has is due to a pigment called urochrome. When your urine is darker (amber), this usually is a sign you arenât getting enough fluids.