The purpose of suctioning is to keep the airway clear of secretions and to prevent plugging. Suction Catheters are flexible, long tubes used to remove respiratory secretions from the airway and is used with a suction machine. Sterile. Suction Catheter kits minimize infection and include all necessary components to clear airways and easily dispose of secretions. Gloves are often included to eliminate cross contamination and maintain cleanliness necessary for collecting specimen samples to be analyzed. Catheter tip design accommodates patients comfortably as the DeLee tip minimizes trauma to the tracheal mucosa for pediatric patients with its special blunt smooth design, and a whistle tip is tapered to minimize trauma for adult patients.