Evacuator is applied for irrigating and drawing off the tissues or organs. The evacuators are possessed of removable syringes with a hollow plunger for injecting liquids or sterile solution into bladder for washing and taking out the solutions from urethra or bladder. A syringe is ideal for washing the body cavity with sterile liquid and transporting fluid through the evacuator where tissue is irrigated from solution and contain the tissue fragments removed from the bladders. Evacuators offer easy & smooth operation of traditional syringes for diagnosing and collecting tissue from a circulating solution without impediment to the flow of the solution within the evacuator.