Closed Wound Drainage Kit. This vacuum drain's most common use is for post-op drainage Jackson Pratt. The kit is designed to create suction or negative pressure for draining wounds. A fenestrated silicone drain is placed into position with the aid of a stainless steel trocar. This drain is attached to a silicone bulb with a one-way valve. When the bulb is released a vacuum is created that pulls exudates out through the drain. Wound exudates can be stored, visualized, or cultured. The drain has a radio opaque line for the entire length. The kit consists of a 130mm stainess steel trocar, silicone fenestrated drain and tubing a silicone bulb a clamp for attachment to bandage or patient.