71f61991_Bleeding_Disorders__Measures
[Test] Partial Thromboplastin Time (PTT) [Ordered when/to] -Investigate bleeding -Pre-surgical screen for risk of excessive bleeding -Monitor heparin anticoagulant therapy [Abnormal results may indicate] Prolonged PTT suggests need for further tests. May indicate: -Coagulation factor deficiency -Specific inhibitor (such as Factor VIII antibody) - Nonspecific inhibitor (such as Lupus anticoagulant) -Patient on heparin and/or blood sample contaminated with heparin [Measures] 
Time to clot; evaluates the intrinsic and common pathways of coagulation cascade
Bleeding Disorders
Measures