The below are open source tools and mostly available on GNU/Linux, and can run on other platforms too: 1  GeoGebra - open source software for dynamic geometry, algebra and calculus for middle/high school and college. Exports interactive web pages.  Kig[1] A GUI based geometry editor.
â¢ Before surgery, wait at least 24 hours after the last dose of LMW heparin is administered before a spinal/epidural catheter is placed. â¢ After surgery, when there is adequate surgical site hemostasis, for twice daily dosing, wait at least 24 hours after catheter removal before resuming therapeutic-dose LMW heparin.
For patients with AF of greater than 48 hours or unknown duration undergoing elective cardioversion, anticoagulation (warfarin, low-molecular weight heparin at full venous thromboembolism treatment doses, or dabigatran) for at least 3 weeks before cardioversion or a transesophageal echocardiography guided approach with abbreviated anticoagulation.