MTB, #11 blades I think are small and pointy. Not too good for opening chests. Maybe a #10 would be better. Anyway both plenty sharp. When I was a medical intern, a star surgical intern opened his first chest for internal cardiac massage right across his mentors fingers. Blood filled the glove and the surgical resident was out of work for a while but returned completely intact and forgave his zealous intern who was really excellent by the way, just excited. Re the thoracic duct, I was just musing. What really would give access directly to the venous system easily and safely would be infusion into the lymphatics say in the foot the way a lymphangiogram is perfomred. No risk of bleeding there and very superficial skin access could be considered. Too far out?? What say you Jesse? Regards, bp