https://nova.newcastle.edu.au/vital/access/ /manager/Index en-au 5 Sensitivity of routine coagulation assays to direct oral anticoagulants: patient samples versus commercial drug-specific calibrators https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:29691 n = 39), rivaroxaban, (n = 56) or apixaban levels (n = 22) between February 2013 and November 2015 were analysed and compared to two different commercial drug specific calibrators from different manufacturers for each DOAC. Our results show that dabigatran (Hyphen and Technoclone) and rivaroxaban (Stago) calibrators tend to overestimate the APTT but are similar to patient samples for PT. A cut-off DOAC level of 50 ng/mL based on results from patient samples within the laboratory can be used as the lower limit which will result in prolongation of APTT for dabigatran (sensitivity 96%, n = 25) and PT for rivaroxaban (sensitivity 97%, n = 29), respectively. Individual laboratories should be familiar with the sensitivity of their coagulation reagents to different DOACs including differences between patient samples versus different commercial drug specific calibrators.]]> Wed 11 Apr 2018 15:02:58 AEST ]]> The effectiveness and safety of direct oral anticoagulants following lower limb fracture surgery: a systematic review and meta-analysis https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:46701 P < 0.0001) and less pharmacologically attributable adverse events (Odds ratio 0.62; 95% confidence interval, 0.46–0.82; P = 0.0007). There was difference between DOACs and conventional VTE prophylaxis regarding mortality, PE, symptomatic deep vein thrombosis, or bleeding events. The results generally support the use of DOACs for VTE prophylaxis after nonelective lower limb fracture surgery, such after hip fracture. The results more strongly support the use of XaIs; however, more evidence is needed to fully assess DOACs' role in clinical practice. Level of Evidence: Therapeutic Level II. See Instructions for Authors for a complete description of levels of evidence.]]> Tue 29 Nov 2022 10:42:17 AEDT ]]>