in a double-blind study , patients with phlebographically proven deep venous thrombosis ( dvt ) were treated with subcutaneous injections twice a day of either unfractionated heparin ( uh ; n = 27 ) or low molecular weight heparin ( lh ; n = 29 ) for 7 days , and the dose was adjusted until therapeutic range was reached , according to a chromogenic substrate anti-xa assay .
C0019134
unfractionated heparin
C0019139
anti-xa