Sterile Suction Catheters Whistle Style 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 which offers easy fingertip control with no residual vacuum in the open position. Suction Catheters are not made with natural rubber latex.