The Jackson-Pratt Drain (also called a JP Drain) is a medical device that is commonly used as a post-operative drain for collecting bodily fluids from surgical sites. The device consists of an internal drain connected to a grenade-shaped bulb via plastic tubing. The flexible bulb has a plug that can be opened to pour off collected fluid. By deflating the grenade by squeezing the result is a vacuum that creates suction in the drainage tubing, which draws fluid from the surgical site. The Jackson Pratt can come with a trocar to allow the perforated channelled tubing to be inserted in to the drain site and out the site for the grenade attachment.