40 ml of dark red blood in the drain at 18 days after tummy tuck may be a little hematoma that has liquefied and has finally drained. The volume by itself is not concerning, but if the drainage picks up or continues see your plastic surgeon for an evaluation. Usually at 3 weeks, drains are ready to come out. Kenneth Hughes, MD Los Angeles, CA
Thank you for the question. Your plastic surgeon will be your best resource when it comes to this issue; he/she is able to evaluate the entire clinical picture, a small part of which is the drain output. In the context of the entire clinical picture, the drain output may or may not be “normal”. In other words, continue to follow closely with your plastic surgeon. Other sources of advice/reassurance cannot be specific enough. Best wishes.