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.
1 Bright yellow urine can mean that your body is dehydrated and also it can mean you are highly acidic. 2  Yellow urine indicates that a person is able to flush out acids stored in the body or that a person's body is not able to process the food that he is eating.3  If it is the first situation it is good. Asparagus is another veggie that will make your urine bright yellow. 2  Drink lots of water (8 glasses a day) and that will help to flush out the kidneys. 3  Bright yellow urine can mean that your body is dehydrated and also it can mean you are highly acidic.