Patients in the Progressive Care Unit (PCU) are acutely or chronically ill and frequently are admitted from intensive care. Nurses take the lead in coordinating care for patients who require continuous monitoring and observation, with special emphasis given to respiratory, neurological and surgical disorders. Many patients depend on technological support, notably those with tracheotomies or negative pressure ventilators (also known as "iron lungs)". Nurses in the PCU teach families to care for their child at home.