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.
An alternative dosage of 40 mg once daily for three weeks, starting 12 hours before surgery, may also be used. The standard Lovenox dose for preventing blood clots in people undergoing knee replacement surgery is 30 mg twice daily for 7 to 10 days, starting 12 to 24 hours after surgery.