Respiratory circuit is used to connect patients with anesthesia or respiratory equipment to deliver respiratory gas. It includes respiratory hoses, Y-pieces with angled connections, Luer-Lock endotracheal tubes, respiratory bag connection hoses, T-connectors with expiratory push rods, and joints. Some packages also include anesthetic respiratory bags, cups, and hose fixators.
Therefore, respiratory circuits are mainly used in situations where anesthesia or respiratory support is required for patients, such as during surgery, intensive care, and treatment. It is important to note that this equipment should be used only once to ensure safety and hygiene.