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The ADIOS study is a prospective, observational study will evaluate one hundred and thirty (130) patients with non-valvular atrial fibrillation who are currently receiving treatment with apixaban as indicated to reduce the risk of stroke or systemic embolism, and who require an elective major surgical or invasive procedure will be included in the study. The purpose of the study is to evaluate the efficacy of the recommended pre-procedure washout period of 48 hours.
This study will estimate for what proportion of patients a 48 hour pre-procedure apixaban discontinuation is sufficient to achieve minimal apixaban plasma levels (less than 30 ng/mL) prior to surgery. The investigators hypothesize that this portion will be 80-95%.
All patients will have a blood draw at 48 hours prior to procedure and then a second blood draw on the morning of the procedure to test apixaban plasma and anti-Xa levels. Patients will also receive a follow-up phone call at 30 days to collect information on clinical events.
Observational Model: Cohort, Time Perspective: Prospective
Lab tests for plasma levels of apixaban and anti-10a factor
Thomas Jefferson University
Thomas Jefferson University
Published on BioPortfolio: 2016-10-18T02:08:21-0400
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Heat- and storage-labile plasma glycoprotein which accelerates the conversion of prothrombin to thrombin in blood coagulation. Factor V accomplishes this by forming a complex with factor Xa, phospholipid, and calcium (prothrombinase complex). Deficiency of factor V leads to Owren's disease.
A peptidohydrolytic enzyme that is formed from PREKALLIKREIN by FACTOR XIIA. It activates FACTOR XII; FACTOR VII; and PLASMINOGEN. It is selective for both ARGININE and to a lesser extent LYSINE bonds. EC 18.104.22.168.
Heat- and storage-stable plasma protein that is activated by tissue thromboplastin to form factor VIIa in the extrinsic pathway of blood coagulation. The activated form then catalyzes the activation of factor X to factor Xa.
A plasma protein which is the precursor of kallikrein. Plasma that is deficient in prekallikrein has been found to be abnormal in thromboplastin formation, kinin generation, evolution of a permeability globulin, and plasmin formation. The absence of prekallikrein in plasma leads to Fletcher factor deficiency, a congenital disease.
A derivative of STARCH used as a plasma substitute in the treatment of hemorrhage.
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