Heparin anti-Xa may be ordered to monitor some people who have heparin resistance who do not respond as expected to UFH or who have an underlying condition or interfering factor(s) such as lupus anticoagulant (LAC) that affects the PTT test result.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.
Green Urine. Green urine is relatively rare, but it does happen. There are a number of reasons why you may one day find yourself urinating green or greenish urine. Some urinary tract infections and problems with bile production can cause green urine, as well as a number of different foods.
The following medications may cause blue urine color: 1  Triamterene â This is a pteridine that as a mild diuretic and can cause a blue urine color.  Rinsapin â This is an antibiotic sometimes used to treat a staph infection and can cause you to see a blue or green urine color.