Sterile Suction Catheters Whistle Style with Tip Control are available in full range of sizes from 6Fr to 18Fr. Suction Catheters with Vacuum Control are sterilized with EO gas and are for single patient use. Suction Catheters are commonly used to extract bodily secretions, such as mucus or saliva from the upper airway. Suction Catheters feature a kink resistant catheter and a soft and rounded open tip with Y type control valve for accurate suction. Suction Catheters are not made with natural rubber latex.