Postoperative nadroparin administration for prophylaxis of thromboembolic events is not associated with an increased risk of hemorrhage after spinal surgery.
Gerlach R, Raabe A, Beck J, Woszczyk A, Seifert V.
Eur Spine J. 2004 Feb;13(1):9-13. doi: 10.1007/s00586-003-0642-8. Epub 2003 Nov 13.
PMID:14615928
High thoracic epidural in cardiac anesthesia: a review.