Wound drains are used to remove exudates from wound sites. The DavolĀ® 400 closed wound suction evacuator kits contain wound drains and evacuators. Wound drains are made up of silicone or PVC materials; they are round shaped with perforations and packaged with a trocar. 400cc evacuators are made up of PVC materials. Clear evacuator sidewalls with volume calibrations facilitate examination and measurement of drainage fluid.