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.
Now, some foods may also cause your urine to have a dark yellow urine color. Asparagus makes your urine darker yellow and it creates a strong odor.The important thing is to think about your diet.f you do not drink enough water, then your urine becomes over-concentrated with waste, which is why it is a darker yellow urine color. You may also notice a stronger odor since the concentration is higher.