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.
If your urine is any color other than yellowish-orange, yellow or clear-you could have a serious medical condition. Very dark orange, reddish or brown If your urine is any color other than yellowish-orange, yellow or clear-you could have a serious medical condition. Very dark orange, reddish or brown urine, for instance, likely has blood in it and could be a sign of infection. There are some prescription drugs, however, that can change the color of your urine simply by passing through your system. Red urine can result, for instance, by taking drugs such as deferoxamine, which is used to treat iron poisoning or phenazopyridine, which is prescribed to treat urinary tract infection pain. Here are some other potential urine colors and some of the drugs that can cause them: Black-can result from taking furazolidone, Flagyl (generic name metronidazole), and other antibiotics. Aldomet (generic name methyldopa), which is used to treat high blood pressure in pregnant women, also can make urine look black because it darkens upon contact with bleach-frequently used to clean toilet bowls.