BD offers a standard thoracentesis/paracentesis device, available in an 8 Fr, 4 - 3⁄4" (12.1cm) polyurethane catheter, over an 18G x 8" (20.3cm) introducer needle for a safe, strong, supple fluid path, excellent specimen retrieval and therapeutic drainage. It features a self-sealing safety valve to maintain a closed system that is activated automatically upon removal of the introducer needle. Multiple spirally-oriented side ports provide a reduced chance of obstruction, helping to ensure optimum return of fluid.