Pratt's sign is an indication of femoral deep vein thrombosis. It is seen as the presence of dilated pretibial veins in the affected leg, which remain dilated on raising the leg.
|Differential diagnosis||femoral deep vein thrombosis|
The sign was described by American surgeon Gerald H. Pratt (1928–2006) of St. Vincent's Hospital in 1949.
This is not the same as the Pratt Test, which checks for a DVT by compressing a vein with the hands.
- PRATT GH (June 1949). "An early sign of femoral thrombosis". J Am Med Assoc. 140 (5): 476. PMID 18129854.
- PRATT GH (May 1950). "Classification and treatment of the varicose, post-thrombotic, and arterial venous problems". Bull N Y Acad Med. 26 (5): 306–28. PMC 1929948. PMID 15411581.