Suction catheters are medical devices used to clear mucus and other secretions from a patient's airway. They are typically made of flexible plastic and come in various sizes to accommodate different patients, including infants and adults. These catheters are connected to a suction machine, which creates negative pressure to help remove blockages, ensuring that the patient can breathe more easily. The use of suction catheters is common in settings such as hospitals and clinics, especially for patients with respiratory conditions like chronic obstructive pulmonary disease (COPD) or those recovering from surgery. Proper technique and hygiene are essential to prevent infections and complications during the suctioning process.