however, the high ptt result, which was at the upper end of the therapeutic range for ufh at our institution (75-108 seconds, corresponding to anti-xa levels of 0.3-0.7 u/ml), was alarming during this life-threatening bleeding episode, caused confusion about the validity of the result, ...
People with high hematocrit levels may have falsely prolonged PTTs. Heparin contamination – this is the most common problem, especially when blood is collected from intravenous lines that are being kept “open” with heparin flushes. Drugs such as antihistamines, vitamin C (ascorbic acid), aspirin...
Monitoring aPTT levels may be indicated for select patients on LDUH thromboprophylaxis who are at high risk or consequence of bleeding and for aPTT prolongation.doi:10.1007/s11239-020-02294-2David FeinbloomJason A FreedAlexander CarboYoojin Jung...